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SAITOH Masato
| Environmental Science and Civil Engineering Division | Professor |
| Department of Civil and Environmental Engineering |
Researcher information
■ Field Of Study- Social infrastructure (civil Engineering, architecture, disaster prevention), Structural and seismic engineering
■ Educational Background
■ Member History
- 01 Jan. 2021 - 31 Dec. 2023
埼玉県建設工事の入札及び契約事務適正化委員会, 委員長 - 01 Jun. 2020 - 31 May 2022
土木学会教育企画・人材育成委員会, 幹事 - 01 Jun. 2020 - 31 May 2022
土木学会論文集（教育部門）編集委員会, 委員長 - 01 Jun. 2018 - 31 May 2020
土木学会論文集（教育部門）編集委員会, 幹事長 - 01 Apr. 2019 - 31 Mar. 2020
土木学会論文賞選考委員会, 幹事長 - 01 Apr. 2016 - 31 Mar. 2019
東京大学地震研究所-京都大学防災研究所拠点間共同研究委員会, 委員 - 01 Apr. 2016 - 31 Mar. 2019
自然災害研究協議会, 関東支部長 - 01 Apr. 2017 - 31 Mar. 2018
埼玉県 AI等の技術活用による防災力強化検討会委員, 委員 - 01 Apr. 2017 - 31 Mar. 2018
蕨市新庁舎建設基本構想・基本計画審議会, 会長 - 01 Apr. 2016 - 31 Mar. 2017
蕨市庁舎整備検討審議会, 副会長
Performance information
■ Paper- Seismic performance of pile foundations reinforced with micropiles
Rahman M.; Iwamura S.; Goit CS; Saitoh M.
18th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-18), Nov. 2024, [Reviewed]
English, International conference proceedings - Effects of soil nonlinearity on the seismic behavior of pile foundations reinforced with micropiles
Goit CS; Honma S.; Saitoh M.; Giri P.
International Journal of Geomechanics, Volume：24, Number：10, First page：04024206, Oct. 2024, [Reviewed]
English, Scientific journal - Innovative Mechanical Device Enhancing Base Isolation Performance against Long-Period Earthquakes
Saitoh M.
18th World Conference on Earthquake Engineering, Jun. 2024, [Reviewed]
English, International conference proceedings - Experimental studies on the kinematic response of micropiles-retrofitted bridge foundations
Goit CS; Maruyama Y.; Saitoh M.; Ekubo S.
18th World Conference on Earthquake Engineering, Jun. 2024, [Reviewed]
English, International conference proceedings - Frequency-and intensity-dependent impedance functions of laterally loaded pile groups in cohesionless soil
NR Shrestha, M Saitoh, CS Goit, AK Saha, R Yokota
Soils and Foundations, Volume：63, Number：4, First page：101340, Aug. 2023, [Reviewed] - Vertical impedance functions of pile groups under low-to-high loading amplitudes: numerical simulations and experimental validation
U Zafar, CS Goit, M Saitoh, R Fukuda
Earthquake Engineering and Engineering Vibration, Volume：Volume 22, First page：647, Last page：666, Jul. 2023, [Reviewed] - APPLICABILITY OF GYRO-LUMPED PARAMETER MODEL IN IDENTIFYING HORIZONTAL IMPEDANCE FUNCTIONS OF PILE GROUPS
M Saitoh
9th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering, Jun. 2023, [Reviewed] - On the Method to Evaluate the Post-earthquake State of Collapsed Structures and Its Applications to Numerical Analyses
Z Liu, M Saitoh
Lecture Notes in Civil Engineering, Proceedings of the 6th International Conference on Advances in Civil Engineering, Volume：Vol.368, First page：323, Last page：336, Dec. 2022, [Reviewed] - On the modeling of frequency- and intensity-dependent impedance functions at the head of horizontally loaded single piles
Saitoh, M.
Soils and Foundations, Volume：62, Number：2, First page：101107, Apr. 2022, [Reviewed] - Influence of Nonlinearities on the Vertical Kinematic Interaction of Piles
Zafar, U. , Goit, C.S. , Saitoh, M.
World Congress on Civil, Structural, and Environmental Engineering, First page：ICSECT 173, Last page：1-8, Apr. 2022, [Reviewed] - 単杭の有効入力動の増幅に及ぼす支配パラメータについて
土井 達也, 室野 剛隆, 齊藤 正人
土木学会論文集A1（構造・地震工学）, Volume：77 巻 3 号, First page：515, Last page：526, Dec. 2021, [Reviewed] - 応答変位法を活用した入力損失効果の実務的評価手法の適用拡大
土井 達也, 室野 剛隆, 齊藤 正人
土木学会論文集A1（構造・地震工学）, Volume：77 巻 3 号, First page：395, Last page：404, Oct. 2021, [Reviewed] - Numerical Modelling of the Rate-Dependent Characteristics of Laterally Loaded Single Pile in Dry Sand
Saha, A.K. , Saitoh, M. , Shrestha, N.R. , Goit, C.S.
Lecture Notes in Civil Engineering, Volume：184, First page：73, Last page：80, Oct. 2021, [Reviewed] - EFFECT OF THE JOINT SHEAR RESISTANCE ON THE DYNAMIC RESPONSES OF STEEL PIPE SHEET PILE FOUNDATIONS
M.S. Ullah, A. Sasaki, C.S. Goit, M. Saitoh
17th World Conference on Earthquake Engineering, Volume：4c-0046, First page：1, Last page：12, Sep. 2021, [Reviewed] - On the Performance of Vertical Base Isolation Systems Using an Adjustable Constant-Force Generator
M. Saitoh, Y. Sawano
17th World Conference on Earthquake Engineering, Volume：2g-0225, First page：1, Last page：12, Sep. 2021, [Reviewed] - Experimental and numerical investigations on vertical dynamic pile-to-pile interactions considering soil and interface nonlinearities
Zafar, Usama, Goit, CS, Saitoh, M
Bulletin of Earthquake Engineering, Volume：Vol.20 Issue7, First page：3117, Last page：3142, Jul. 2021, [Reviewed] - Inclined single piles under vertical loadings in cohesionless soil
Goit Chandra Shekhar, Saitoh Masato, Igarashi Takumi, Sasaki Shun
Acta Geotechnica, Volume：16, First page：1231, Last page：1245, Apr. 2021, [Reviewed] - Experimental and Numerical Analysis on the Rate-Dependent Cyclic Lateral Load on a Single Pile in Sand
Shrestha Naba Raj、Saitoh Masato、Saha Alok Kumer、Goit Chandra Shekhar
International Journal of Civil Infrastructure, Volume：4, First page：9, Last page：15, 2021, [Reviewed] - Frequency- and intensity-dependent impedance functions of laterally loaded single piles in cohesionless soil
Shrestha Naba Raj、Saitoh Masato、Saha Alok Kumer、Goit Chandra Shekhar
Soils and Foundations, Volume：61, First page：129, Last page：143, 2021, [Reviewed] - 地震直後の危険な建物を空撮動画から早期検出する手法の開発
水川裕貴, 齊藤正人
日本地震工学会, Volume：A-2-6_T2020-41, First page：1, Last page：9, Dec. 2020, [Reviewed] - Rate-Dependent Cyclic Lateral Load Test on a Single Pile in Sand
Naba Raj Shrestha, Masato Saitoh, Alok Kumer Saha, Chandra Shekhar Goit
Proceedings of the 5th International Conference on Civil Structural and Transportation Engineering (ICCSTE'20), Volume：DOI: 10.11159/iccste20.231, First page：231, Last page：1-7, Nov. 2020, [Reviewed] - 鉄道構造物の耐震設計における危機耐性の定量評価法の提案
室野 剛隆, 田中 浩平, 齊藤 正人, 坂井 公俊, 豊岡 亮洋
土木学会論文集A1（構造・地震工学）, Volume：75 巻 3 号, First page：336, Last page：349, Dec. 2019, [Reviewed] - Earthquake motion filtering effect by pile foundations considering nonlinearity of soil and piles
Hochi, Yudai; Murono, Yoshitaka; Saitoh, Masato; Goit, Chandra Shekhar
Soil Dynamics and Earthquake Engineering, Volume：Volume 125, First page：105748, Oct. 2019, [Reviewed] - Effective foundation input motion for soil-steel pipe sheet pile (SPSP) foundation system
1) Ullah MS, Kajiwara K, Goit CS, Saitoh M.
International conference on computational & experimental engineering and sciences (ICCES), Volume：Paper No. 4966, First page：1, Last page：14, Mar. 2019, [Reviewed] - Frequency and intensity dependent dynamic responses of soil-steel pipe sheet pile (SPSP) foundation-superstructure system
Ullah, Md. Shajib; Kajiwara, Keisuke; Goit, Chandra Shekhar; Saitoh, Masato
Soil Dynamics and Earthquake Engineering, Volume：Volume 125, First page：105730, 2019, [Reviewed] - Development of the collapse direction control device to improve anti-catastrophe performance
Toyooka, Y. Murono, M. Saitoh
16th European Conference on Earthquake Engineering, Volume：Paper No.10340, First page：1, Last page：11, 2018, [Reviewed] - A comprehensive study on the performance of base isolation systems with variable negative stiffness
S. Nepal, M. Saitoh
25th International Congress on Sound and Vibration, First page：1, Last page：8, 2018, [Reviewed] - Influence of pile radius on the pile head kinematic bending of end-bearing pile groups
M.F. Torshizi, M. Saitoh, G.M. Álamo, C.S. Goit, L.A. Padrón
Soil Dynamics and Earthquake Engineering, Volume：105, First page：184, Last page：203, 2018, [Reviewed] - 杭基礎ラーメン高架橋の構造全体系による入力損失効果とその簡易な評価手法
寳地 雄大, 室野 剛隆, 齊藤 正人
土木学会論文集A1（構造・地震工学）, Volume：74 巻 3 号, First page：504, Last page：515, 2018, [Reviewed] - On the verification of superposition method of kinematic interaction and inertial interaction in dynamic response analysis of soil-pile-structure systems
M.S. Ullah, H. Yamamoto, C.S. Goit, M. Saitoh
Soil Dynamics and Earthquake Engineering, Volume：113, First page：522, Last page：533, 2018, [Reviewed] - Single pile under vertical vibrations in cohesionless soil
C. S. Goit, M. Saitoh
Géotechnique, Volume：68(10), First page：893, Last page：904, 2018, [Reviewed] - Influence of pile radius on the pile head kinematic bending strains of endbearing pile groups
Mostafa Faghihnia Torshizi, Masato Saitoh, Guillermo M. Álamo, Chandra Shekhar Goit, Luis A. Padrón
Soil Dynamics and Earthquake Engineering, Volume：105, First page：184, Last page：203, 2017, [Reviewed] - Influence of Pile Radius on Inertial Response of Pile Group in Fundamental Frequency of Homogeneous Soil Medium
Faghihnia Torshizi Mostafa, Saitoh Masato
International Journal of Geological and Environmental Engineering, Volume：Vol:11, No:4, First page：345, Last page：351, 2017, [Reviewed] - Expanded superposition method for impedance functions of inclined-pile groups
Saitoh, M., Padrón, L.A., Aznárez, J.J., Maeso, O., Goit, C. S.
International Journal for Numerical and Analytical Methods in Geomechanics, Volume：Vol.40, First page：185, Last page：206, 2016, [Reviewed] - Principle of superposition for assessing horizontal dynamic response of pile groups encompassing soil nonlinearity
Goit, C.S., Saitoh, M., Mylonakis, G.
Soil Dynamics and Earthquake Engineering, Volume：Vol.82, First page：73, Last page：83, 2016, [Reviewed] - Experimental approach on the pile-to-pile interaction factors and impedance functions of inclined piles.
Goit C.S, Saitoh M.
Géotechnique, Volume：Vol. 66(11), First page：888901, 2016, [Reviewed] - Resilient Structural Systems for Earthquake Disaster Mitigation Using Collapse Direction Control Devic
Saitoh, M., Murono, Y., Motoyama, H.
Proceedings International Symposium on Engineering, Energy and Environment, Volume：Vol.4, First page：614, Last page：617, 2015, [Reviewed] - Analytical evaluation of deformation-mitigation device for structures subjected to earthquake ground motions
Liu, Z., Saitoh, M.
Proceedings International Symposium on Engineering, Energy and Environment, Volume：Vol.4, First page：676, Last page：680, 2015, [Reviewed] - Novel method in avoiding flood induced damages due to tidal waves
Nakabe, S., Saitoh, M.
Proceedings International Symposium on Engineering, Energy and Environment, Volume：Vol.4, First page：681, Last page：685, 2015, [Reviewed] - Model Tests on Horizontal Impedance Functions of Fixed-Head Inclined Pile Groups under Soil Nonlinearity
Chandra Shekhar Goit; Masato Saitoh
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, Volume：140, Number：6, First page：04014023, Last page：1-12, Jun. 2014, [Reviewed]
The effects of soil nonlinearity on the dynamic behavior of fixed-head floating inclined pile groups are investigated experimentally in the form of horizontal impedance functions (IFs) and internal forces in piles. A 2x2 model of inclined pile groups embedded in dry cohesionless soil and subjected to a broad range of lateral harmonic loadings at the pile-cap level are examined. Piles with a spacing-to-the-diameter ratio (s/d) of 5 with practical pile inclinations of 0, 5, and 10 degrees along the direction of loading are reported. Results show a profound impact of local nonlinearity and resonance of soil on the horizontal impedance functions. The inclined pile groups show higher values of horizontal IFs than the vertical pile group, in accordance with the general understanding. Influence of pile inclinations on the horizontal IFs is further examined through the variation of soil reactions along the depth of the piles. Semiempirical expressions for estimating the soil reactions, as a function of pile inclinations, are proposed. As for the internal forces in piles, bending strains for the inclined piles are smaller than the vertical pile; the axial strains show an opposite behavior. (C) 2014 American Society of Civil Engineers.
ASCE-AMER SOC CIVIL ENGINEERS, English, Scientific journal
DOI：https://doi.org/10.1061/(ASCE)GT.1943-5606.0001127
DOI ID：10.1061/(ASCE)GT.1943-5606.0001127, ISSN：1090-0241, eISSN：1943-5606, Web of Science ID：WOS:000336250200019 - An external rotary friction device for displacement mitigation in base isolation systems
Saitoh M.
Structural Control and Health Monitoring, Volume：vol.21, First page：173, Last page：188, 2014, [Reviewed] - Formulas for Determining Structural Variables to Control the Maximum Deformations and Stored Energies in Structures with Elastic-Perfectly Plastic Springs under Monotonic Loading
Saitoh M.
Journal of Engineering Mechanics, Volume：Vol.140(2), First page：250, Last page：256, 2014, [Reviewed] - 地震動の高振動数成分が杭基礎のキネマティック応答に及ぼす影響に関する研究
佐藤絵人、齊藤正人
第14回日本地震工学シンポジウム論文集, First page：3758, Last page：3766, 2014 - 近傍地盤の局所非線形性を考慮した斜杭基礎の動的水平インピーダンス特性に関する実験的研究
齊藤正人、Goit Shekhar Chandra
第14回日本地震工学シンポジウム論文集, First page：3772, Last page：3777, 2014 - 強震時における室内機器等の転倒抑制デバイスの解析的評価
竹村隆一、齊藤正人
第14回日本地震工学シンポジウム論文集, First page：3797, Last page：3804, 2014 - Effects of Soil Nonlinearity on the Active Length of Piles Embedded in Cohesionless Soil: Model Studies
Goit, C.S, Saitoh, M., Oikawa, H., Kawakami, H.
Acta Geotechnica, Volume：Vol.9, Number：No.3, First page：455, Last page：467, 2014, [Reviewed] - 斜杭基礎のキネマチック・インターラクションに関する研究
田蔵隆,張至鎬,田地陽一,木全宏之,坂井康伸,齊藤正人,Chandra Goit
土木学会論文集A, Volume：Vol.70, Number：No.1, First page：51, Last page：66, 2014, [Reviewed] - An external rotary friction device for displacement mitigation in base isolation systems
Saitoh M.
Structural Control and Health Monitoring, Volume：DOI: 10.1002/stc.1560, 2013, [Reviewed] - Model tests and numerical analyses on horizontal impedance functions of inclined single piles embedded in cohesionless soil
Goit, C.S, Saitoh, M.
Earthquake Engineering and Engineering Vibration, Volume：12(1), First page：143, Last page：154, 2013, [Reviewed] - Applicability of principle of superposition in obtaining horizontal impedance functions of pile group under soil nonlinearity
Chandra Goit, Masato Saitoh, George Mylonakis
Computational Methods in Structural Dynamics and Earthquake Engineering, Volume：CD-ROM, First page：1, Last page：7, 2013, [Reviewed] - Model tests on horizontal pile-to-pile interaction incorporating local non-linearity and resonance effects
Goit, C.S, Saitoh, M., Mylonakis, G., Kawakami, H., Oikawa, H
Soil Dynamics and Earthquake Engineering, Volume：Vol.48, First page：175, Last page：192, 2013, [Reviewed] - A New Experimental Technology for Representing Soil-Foundation Systems by Mechanical Interface
Saitoh, M., Hikima, T., Imanishi, K.
Proceedings International Symposium on Engineering, Energy and Environment, Volume：Vol.3, First page：441, Last page：446, 2013, [Reviewed] - On the Performance of External Rotary Friction Device for Preventing Fall of Furniture and Equipments
Takemura, R., Saitoh, M.
Proceedings International Symposium on Engineering, Energy and Environment, Volume：Vol.3, First page：453, Last page：458, 2013, [Reviewed] - Representation of Soil-Foundation Systems and Its Application to Shaking Table Tests by Constructing a Mechanical Interface
Saitoh, M., Saito, T., Hikima, T., Ozawa, M., Imanishi, K.
Earthquake Spectra, Volume：Vol.29, No.2, First page：547, Last page：571, 2013, [Reviewed] - Highly Reduced Lumped Parameter Models Representing Impedance Functions at the Interface of One-Dimensional Viscoelastic Continua
Masato, Saitoh
Journal of Vibration and Acoustics, Volume：134, First page：031008, Last page：1-11, 2012, [Reviewed] - A one-dimensional lumped parameter model representing impedance functions in general structural systems with proportional damping
Masato Saitoh
International Journal for Numerical Methods in Engineering, Volume：90, First page：353, Last page：368, 2012 - On the performance of lumped parameter models with gyro‐mass elements for the impedance function of a pile‐group supporting a single‐degree‐of‐freedom system
Masato Saitoh
Earthquake Engineering and Structural Dynamics, Volume：41, First page：623, Last page：641, 2012 - Impedance functions of end-bearing inclined piles
Padron, L.A, Aznarez, J.J., Maeso, O., Saitoh, M.
Soil Dynamics and Earthquake Engineering, Volume：38, First page：97, Last page：108, 2012 - Lumped parameter models representing impedance functions at the end of a finite beam on a viscoelastic medium
Masato Saitoh
Computers and Structures, Volume：92-93, First page：317, Last page：327, 2011 - On the performance of gyro-mass devices for displacement mitigation in base isolation systems
Masato Saitoh
Structural Control and Health Monitoring, Volume：DOI: 10.1002/stc.419 (in printing), First page：1, Last page：14, 2010 - Lumped parameter models representing impedance functions at the interface of a rod on a viscoelastic medium
Masato Saitoh
Journal of Sound and Vibration, Volume：330, Number：9, First page：2062, Last page：2072, 2010 - Equivalent One-Dimensional Spring-Dashpot System Representing Impedance Functions of Structural Systems with Non-Classical Damping
Masato Saitoh
CMES: Computer Modeling in Engineering & Sciences, Volume：67, Number：3, First page：211, Last page：238, 2010 - Effect of local nonlinearity in cohesionless soil on optimal radius minimizing fixed-head pile bending by inertial and kinematic interactions
Masato Saitoh
Acta Geotechnica, Volume：5, First page：273, Last page：286, 2010 - Nonlinear Response of Superstructures Influenced by Frequency- Dependent Oscillations in Impedance Functions of Pile Groups Embedded in a Layered Soil
Masato Saitoh
Computational Methods in Structural Dynamics and Earthquake Engineering, Volume：2(CD), 2009 - Mechanical Representation of Dynamic Stiffness of Soil- Foundation Systems, Seismic Design
Masato Saitoh
Seismic Design, Observation, Retrofit of Foundations, Volume：3, 2009 - Effects of Nonliearity upon Optimal Radius of Fixed-Head Pile Subjected to Kinematic Interaction
Masato Saitoh
International Symposium on Engineering, Energy and Environment (ISEEE), Volume：1, First page：101, 2009 - Damage to Structures Subjected to Aftershocks Evaluated by Using Damage Index
Otsuka, S., Saitoh, M., Kawakami, H., Nogami Y., and Murono Y.
International Symposium on Engineering, Energy and Environment (ISEEE), Volume：1, First page：111, 2009 - Evaluation of Natural Periods of Ground Subjected to Strong Earthquake Waves Based on H/V Technique
Nakagawa, R., Saitoh, M., and Kawakami, H.
International Symposium on Engineering, Energy and Environment (ISEEE), Volume：1, First page：112, 2009 - Soil-Structure Interaction Effects on Elastic Response of Buildings in Bangkok by Frequency-Dependent Impedance Foundation
Pongsathon, C.Nakhorn P.Saitoh, M.
International Symposium on Engineering, Energy and Environment (ISEEE), Volume：1, First page：119, 2009 - Gyromass Element を利用した基礎 地盤系の動的相互作用問題に関する新手法の提案
齊藤正人
理論応用力学講演会 講演論文集, Volume：57, First page：1, Last page：2, 2008, [Reviewed] - 粘性土地盤の杭基礎近傍における塑性化が最適杭径に及ぼす影響の解析的評価
齊藤正人
土木学会論文集A, Volume：64, Number：2, First page：179, Last page：191, 2008, [Reviewed]
土木学会 - Experimental Studies on Non-Linear Response of Soil-Pile-Structure Systems Subjected to Strong Ground Motion
C. S. Goit, M. Saitoh, H. Kawakami and S. Nishiyama
14th World Conference on Earthquake Engineering, Beijing, China, First page：1, Last page：8, 2008 - An Innovative Method for Evaluating the Dynamic Response of Inelastic Structures with Frequency-Dependent SSI
Masato Saitoh
14th World Conference on Earthquake Engineering, Beijing, China, First page：1, Last page：8, 2008 - AN INNOVATIVE BASE-ISOLATION SYSTEM FOR ENVIRONMENTAL PROTECTION AGAINST POLLUTIONS CAUSED BY DAMAGE TO FACILITIES DUE TO EARTHQUAKES
Masato Saitoh
International Symposium on Environmental Management: Hazardous-Environmental Management toward Sustainability, Volume：1, First page：22, 2008, [Reviewed] - 強震動による免震システムの過大応答変位を抑制するための新機構の提案と解析的評価
齊藤正人
土木学会論文集A, Volume：64, Number：2, First page：258, Last page：272, 2008, [Reviewed]
土木学会 - Simple Model of Frequency-Dependent Impedance Functions in Soil-Structure Interaction Using Frequency-Independent Elements
Masato Saitoh
Journal of Engineering Mechanics, ASCE, Volume：133, Number：10, First page：1101, Last page：1114, 2007, [Reviewed] - Evaluation of Seismic Deformation Method for Determining Optimal radius minimizing Fixed-Head Pile Bending and Its Application to Practical Conditions
Masato Saitoh
Computational Methods in Structural Dynamics and Earthquake Engineering, Volume：CD, First page：1, Last page：12, 2007, [Reviewed] - Minimization of Fixed-Head Pile Bending at Optimal Radius under Realistic Conditions by Using Seismic Deformation Method
Masato Saitoh
Proceedings of the 2nd Greece-Japan Workshop(Tokyo), Seismic Design, Observation, Retrofit of Foundations, Volume：2, First page：401, Last page：408, 2007 - Optimization of pile radius minimizing fixed-head pile bending inflluenced by kinematic interaction
Masato Saitoh
Research Report of Depertment of Civil and Environmental Engineering, Volume：34, First page：31, Last page：37, 2006 - Fixed-head pile bending by kinematic interaction and criteria for its minimization at optimal pile radius
Masato Saitoh
Journal of Geotechnical and Geoenvironmental Engineering, Volume：131, Number：10, First page：1243, Last page：1251, Oct. 2005
This study focuses on how to determine an optimal radius minimizing the bending strains of vertical, cylindrical fixed-head piles embedded in a homogeneous elastic stratum in soil-pile-structure systems where the kinematic interaction dominates. In order to determine the appropriate radius, closed form formulae for the bending strains at the head of the piles are derived based on three-dimensional wave propagation theory. A general expression of the closed form formulae can be obtained by normalizing the bending strains with respect to a mean shear strain of the soil medium. The normalized bending strains can be expressed by the radius to height ratio of the piles, the ratio of soil to pile stiffness, and a factor representing the relative amplitude and the phase lag between the loading at the head of the piles and the deformation of the ground. The results of parametric analyses reveal the presence of an optimal radius that locally minimizes the bending strains of the piles. Criteria for determining the optimal radius of soil-pile-structure systems are presented. Journal of Geotechnical and Geoenvironmental Engineering © ASCE.
English, Scientific journal
DOI：https://doi.org/10.1061/(ASCE)1090-0241(2005)131:10(1243)
DOI ID：10.1061/(ASCE)1090-0241(2005)131:10(1243), ISSN：1090-0241, CiNii Articles ID：80017581160, SCOPUS ID：26844545413 - 地盤変形と慣性力を同時に受ける杭基礎の損傷低減のための最適杭径に関する基礎的研究
齊藤正人
土木学会論文集, Volume：787, Number：787, First page：161, Last page：175, 2005
It is known that the bending strain of pile foundations is generated not only by the inertial interaction due to superstructure, but also by the kinematic interaction due to large deformation of soft soil layers. Therefore, it is highly necessary to investigate the characteristic of pile bending due to kinematic and inertial interactions. The present study focuses on the appropriate diameter that minimizes the bending strain at the top of the piles when subjected to these interactions simultaneously. In this research, the relation between the diameter of pile and its bending strain is evaluated based on theoretical approaches. As a result, the appearance of the adequate diameter that minimizes the pile bending strain and its conditions are found and their characteristics are investigated.
Japan Society of Civil Engineers, Japanese
DOI ID：10.2208/jscej.2005.787_161, ISSN：0289-7806, CiNii Articles ID：10014006243, CiNii Books ID：AN10014020 - A Quasistatic Analysis Method to Improve Collapse Mechanism Analyses of Multistory Buildings
Saitoh M, Ikegame M., and Tanamura, S.
13th World Conference on Earthquake Engineering Conference Proceedings (CD-ROM), Number：1284, First page：1, Last page：10, Aug. 2004 - Effects of flexibility on rocking impedance of deeply embedded foundation
M Saitoh; H Watanabe
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, Volume：130, Number：4, First page：438, Last page：445, Apr. 2004
This paper presents a detailed investigation of the influence on the rocking impedance of flexible sidewalls in embedded foundations. The study focuses on vertical and cylindrical foundations embedded in a homogeneous elastic stratum. In order to anticipate the effects of the flexibility, closed-form formulae for rocking impedance are derived based on three-dimensional wave propagation theory and superposition of both the rocking and flexural movements on a single model by assuming complete bonding conditions between the soil and foundations. A function representing the effect of the flexibility is identified from the closed-form formulae, in terms of the height to radius ratio of the foundations and the ratio of the stiffnesses of the ground and foundations. The rocking impedance for a flexible sidewall differs from those evaluated under the assumption of a rigid sidewall. The applicable range of rocking impedance evaluated under the assumption of a rigid sidewall is assessed, and contours to assist in the estimation of the dynamic response of deeply embedded foundations are presented.
ASCE-AMER SOC CIVIL ENGINEERS, English, Scientific journal
DOI：https://doi.org/10.1061/(ASCE)1090-0241(2004)130:4(438)
DOI ID：10.1061/(ASCE)1090-0241(2004)130:4(438), ISSN：1090-0241, CiNii Articles ID：80016585984, Web of Science ID：WOS:000220572200010 - EVALUATION OF INPUT LOSS OF DEEPLY EMBEDDED RIGID FOUNDATIONS UNDER COMPOUNDED NONLINEAR CONDITIONS
SAITOH Masato; IKEGAME Masaki; TANAMURA Shirou; WATANABE Hiroyuki
Number：759, First page：143, Last page：155, 2004
Japanese
DOI ID：10.2208/jscej.2004.759_143, ISSN：0289-7806, CiNii Articles ID：10012033161, CiNii Books ID：AN10014020 - EXPERIMENTAL RESEARCH ON RESONANT CHARACTERISTIC OF DEEPLY EMBEDDED CIRCULAR FOUNDATION-SUPERSTRUCTURE SYSTEM UNDER COMPOUNDED NONLINEAR CONDITIONS
SAITOH Masato; IKEGAME Masaki; TANAMURA Shirou; WATANABE Hiroyuki
Number：759, First page：131, Last page：142, 2004
Japanese
DOI ID：10.2208/jscej.2004.759_131, ISSN：0289-7806, CiNii Articles ID：10012033137, CiNii Books ID：AN10014020 - THEORETICAL EVALUATION OF INPUT LOSS REFLECTED TO FLEXIBILITY OF DEEPLY EMBEDDED FOUNDATIONS
SAITOH Masato; NISHIMURA Akihiko; WATANABE Hiroyuki
Number：731, First page：317, Last page：330, 2004
Japanese
DOI ID：10.2208/jscej.2003.731_317, ISSN：0289-7806, CiNii Articles ID：10012499968, CiNii Books ID：AN10014020 - 地盤変形を受ける杭基礎の杭径寸法が杭体の損傷に及ぼす影響について
齊藤正人
Number：766, First page：175, Last page：189, 2004
DOI：https://doi.org/10.2208/jscej.2004.766_175
DOI ID：10.2208/jscej.2004.766_175, ISSN：0289-7806, CiNii Articles ID：10012801297 - 滑りと剥離の境界非線形性が杭基礎の動的インピーダンスに及ぼす影響に関する研究
齊藤正人; 渡邉啓行
土木学会論文集, Volume：766, Number：766, First page：263, Last page：275, 2004
土木学会, Japanese
DOI ID：10.2208/jscej.2004.766_263, ISSN：0289-7806, CiNii Articles ID：10012801410, CiNii Books ID：AN10014020 - EVALUATION OF INPUT LOSS OF DEEPLY EMBEDDED FOUNDATIONS REFLECTED TO SLIPPAGE AND SEPARATION BETWEEN SOILAND FOUNDATION WALL
SAITOH Masato; WATANABE Hiroyuki
Doboku Gakkai Ronbunshu, Volume：2003, Number：745, First page：39, Last page：51, 2003
The present study focuses on input loss of deeply embedded foundations that support bridges and viaducts. It is predicted that slippage and separation occur at the interface between soil and the sidewall of the foundations when subjected to strong motions. Therefore, it is desirable to know the effect of slippage and separation on the input loss. This study investigates the above effect by means of analytical approach based on a three-dimensional wave propagation theory, including the influence of inertial interaction due to the mass of foundation and superstructure upon the interface. The present study gives physical understanding of the effect of slippage and separation on the input loss.
Japan Society of Civil Engineers, Japanese
DOI：https://doi.org/10.2208/jscej.2003.745_39
DOI ID：10.2208/jscej.2003.745_39, ISSN：0289-7806, CiNii Articles ID：10011670208 - A New Method to Detect Damage to Foundation Utilizing Intelligent Material
西岡英俊,渡辺健治,齊藤正人,村田修,川上英二
土と基礎, Volume：51, Number：11, First page：17, Last page：19, 2003
type:text
It is difficult and is not efficient to detect damage to the underground structures by conventional damage detection method used for the usual maintenance of railway structures on the ground such as girder and pier. In this study, a new method using intelligent material was established to make it possible to detect damage to foundation with simplicity and cost effectivity Further, vertical loading tests against concrete specimen in which three different types of intelligent material were installed were carried out The experiments revealed that all intelligent materials employed in this study can certainly detect damage to the specimen.
rights: 社団法人地盤工学会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110003889738/
地盤工学会, Japanese, Scientific journal
ISSN：0041-3798, CiNii Articles ID：110003889738, CiNii Books ID：AN00312317 - 地盤のひずみ依存性が大型基礎の入力損失効果に与える影響に関する評価
齊藤正人; 池亀真樹; 棚村史郎; 渡邉啓行
土木学会論文集, Volume：2003, Number：738, First page：219, Last page：231, 2003
The present study focuses on the input loss of deeply embedded foundations that support bridges and viaducts. It is widely known that the strain dependency of soil dominates in surface layers supporting the foundations when subjected to strong motions. Therefore, it is desirable to know how the input loss is affected by the strain dependency accompanied by changes in stiffness and damping of soil. This study investigates the influence of strain dependency on the input loss by means of vibration tests and a theoretical approach of a closed form solution of input loss with a constitutive model for the nonlinearity of soil. The present study gives physical understanding for the relation of the strain dependency and the input loss.
Japan Society of Civil Engineers, Japanese
DOI：https://doi.org/10.2208/jscej.2003.738_219
DOI ID：10.2208/jscej.2003.738_219, ISSN：0289-7806, CiNii Articles ID：80016053257
- 基礎の曲げ剛性および基礎先端の回転抵抗が 入力損失効果に及ぼす影響
土井達也,室野剛隆,齊藤正人
第22回橋梁等の耐震設計シンポジウム講演論文集, First page：209, Last page：216, Jul. 2019 - 倒壊方向制御構造で危機耐性を向上 させたラーメン高架橋の振動台実験
布川博一,豊岡亮洋,齊藤正人
第22回橋梁等の耐震設計シンポジウム講演論文集, First page：305, Last page：312, Jul. 2019 - 基礎の曲げ剛性および基礎先端の回転剛性が 有効入力動の増幅に及ぼす影響
土井達也,室野剛隆,齊藤正人
第39回地震工学研究発表会, 2019 - FEM 解析と常時微動観測に基づく鉄道高架橋－隣接建物間の動的相互作用の基本特性
和田 一範,室野 剛隆,寳地 雄大, 小野寺 周,齊藤 正人
第20回性能に基づく橋梁等の耐震設計に関するシンポジウム講演論文集, Volume：No.20, First page：181, Last page：186, 2017, [Reviewed] - 杭基礎を有するラーメン高架橋の構造全体系による入力損失の評価手法に関する研究
寳地 雄大, 室野 剛隆,齊藤 正人,和田 一範
第20回性能に基づく橋梁等の耐震設計に関するシンポジウム講演論文集, Volume：No.20, First page：193, Last page：200, 2017, [Reviewed] - 危機耐性を向上させる倒壊方向制御構造の振動台実験
豊岡 亮洋, 室野 剛隆, 齊藤 正人
第20回性能に基づく橋梁等の耐震設計に関するシンポジウム講演論文集, Volume：No.20, First page：49, Last page：56, 2017, [Reviewed] - 鉄道構造物における危機耐性の定量評価に関する試算例
田中 浩平,坂井 公俊,室野 剛隆, 齊藤 正人
第20回性能に基づく橋梁等の耐震設計に関するシンポジウム講演論文集, Volume：No.20, First page：65, Last page：72, 2017, [Reviewed] - 鉄道構造物における危機耐性の性能規定化にむけたフレームワーク構築
田中浩平, 室野剛隆, 坂井公俊, 齊藤正人,本山紘希
第19回性能に基づく橋梁等の耐震設計に関するシンポジウム講演論文集, Volume：Vol.19, 2016, [Reviewed] - 基盤構造インターフェースのメカニカルシミュレータの創成とその基礎研究
齋藤 正人
総合研究機構研究プロジェクト研究成果報告書, Number：6(平成19年度), 2008
埼玉大学総合研究機構 - M7級の都市直下地震が引き起こす側方流動の被害を最小限に抑制する信頼性・安全性の高いハイパフォーマンス基礎システムの研究
齊藤 正人
総合研究機構研究プロジェクト研究成果報告書, Number：5(18年度), First page：610, Last page：611, 2007
埼玉大学総合研究機構 - 基盤断層の変位が第四紀地盤上の構造物に与える影響の評価
岩下 和義; 谷山 尚; 長田 昌彦; 川上 英二; 茂木 秀則; 斎藤 正人
Volume：7, First page：80, Last page：83, 2006 - 新潟県中越地震で観測された液状化現象に伴う極軟弱地盤の側方流動に適応したハイパフォーマンス基礎システムに関する研究
齊藤 正人
総合研究機構研究プロジェクト研究成果報告書, Number：4(17年度), 2006
埼玉大学総合研究機構 - 地表面での地震動のばらつきと地形・樹木・建物群などの影響の解明
川上英二; 渡辺啓行; 荒川洋二; 岩下和義; 茂木秀則; 谷山尚; 斎藤正人
Volume：4, 2005
ISSN：1347-1945, J-Global ID：200902244211646860 - 湾岸開発地域に建設される超高層免震タワーの群杭基礎システムに関する地震被害予測とその最適プロポーション選定法の研究<速報>
齊藤 正人
Volume：1, Number：38, First page：110, Last page：113, 2005 - 湾岸開発地域に建設される超高層免震タワーの群杭基礎システムに関する地震被害予測とその最適プロポーション選定法の研究
齊藤 正人
総合研究機構研究プロジェクト研究成果報告書, Volume：16年度, 2005
埼玉大学総合研究機構 - 基礎と地盤の境界部に生じる滑り・剥離の影響を考慮した動的解析
齊藤正人; 棚村史郎
Volume：15, Number：3, First page：29, Last page：34, 2001 - Effective Seismic Motion of Caisson and Pile Foundation
Saitoh, M
Volume：46, First page：1, Last page：275, 2001 - 基礎と地盤の境界部に生じる滑り・剥離の影響を考慮した動的解析
齊藤正人; 棚村史郎
鉄道総合技術論文誌，鉄道総研報告, Volume：15, Number：3, First page：29, Last page：34, 2001
鉄道総合技術研究所, Japanese
ISSN：0914-2290, CiNii Articles ID：40004709572, CiNii Books ID：AN1008252X - Effective Seismic Motion of Caisson and Pile Foundation
Saitoh, M
Railway Technical Research Institute, RTRI REPORT, Special, Volume：46, First page：1, Last page：275, 2001 - 既設構造物の耐震性評価法に関する研究
羅休,齊藤正人,室野剛隆,羽矢洋,棚村史郎,田中玲光,今村年成
第4回耐震補強・補修，耐震診断に関するシンポジウム論文集, Volume：1, First page：131, Last page：138, 2000 - 地盤の非線形性を考慮した有効入力動に関する模型振動実験とそのシミュレーション
齊藤正人; 池亀直樹; 棚村史郎; 渡邉啓行
Volume：1, First page：125, Last page：130, 2000 - 既設構造物の耐震性評価法に関する研究
羅休; 齊藤正人; 室野剛隆; 羽矢洋; 棚村史郎; 田中玲光; 今村年成
第4回耐震補強・補修，耐震診断に関するシンポジウム論文集, Volume：1, First page：131, Last page：138, 2000 - 地盤の非線形性を考慮した有効入力動に関する模型振動実験とそのシミュレーション
齊藤正人; 池亀直樹; 棚村史郎; 渡邉啓行
第45回地盤工学シンポジウム論文集, Volume：1, First page：125, Last page：130, 2000
CiNii Articles ID：80011998513 - A.:Study on Effective Seismic Motion and Its Application to Seismic Design
Saitoh, M; Nishimura
12th World Conference on Earthquake Engineering(CD-ROM) No.2697., Volume：1, First page：1, Last page：8, 2000 - ケーソン基礎の耐震設計
西山誠冶,齊藤正人,羽矢洋,棚村史郎,西村昭彦
鉄道総合技術論文誌，鉄道総研報告, Volume：13, Number：3, First page：19, Last page：24, 1999
鉄道総合技術研究所, Japanese
ISSN：0914-2290, CiNii Articles ID：40004709345, CiNii Books ID：AN1008252X - 地盤の不整形性および構造物への有効入力動の評価
室野剛隆,齊藤正人,西村昭彦
鉄道総合技術論文誌，鉄道総研報告, Volume：13, Number：2, First page：23, Last page：28, 1999
鉄道総合技術研究所, Japanese
ISSN：0914-2290, CiNii Articles ID：40004709336, CiNii Books ID：AN1008252X - 大型基礎の耐震設計
小林雅彦; 齊藤正人; 棚村史郎; 西村昭彦
Volume：13, Number：3, First page：31, Last page：36, 1999 - 基礎の入力損失効果を考慮した所要降伏震度スペクトルに関する研究
齊藤正人,西村昭彦
第25回地震工学研究発表会講演論文集, Volume：1, First page：541, Last page：544, 1999
DOI：https://doi.org/10.11532/proee1997.25.541
DOI ID：10.11532/proee1997.25.541 - 所要降伏震度スペクトルの作成と耐震設計への適用
西村昭彦,室野剛隆,齊藤正人
第3回地震時保有耐力法に基づく橋梁の耐震設計に関するシンポジウム講演論文集, Volume：1, First page：43, Last page：48, 1999 - ケーソン基礎の耐震設計
西山誠冶; 齊藤正人; 羽矢洋; 棚村史郎; 西村昭彦
鉄道総合技術論文誌，鉄道総研報告, Volume：13, Number：3, First page：19, Last page：24, 1999 - 地盤の不整形性および構造物への有効入力動の評価
室野剛隆; 齊藤正人; 西村昭彦
鉄道総合技術論文誌，鉄道総研報告, Volume：13, Number：2, First page：23, Last page：28, 1999
Japanese
ISSN：0914-2290, CiNii Articles ID：40004709336, CiNii Books ID：AN1008252X - 大型基礎の耐震設計
小林雅彦; 齊藤正人; 棚村史郎; 西村昭彦
鉄道総合技術論文誌，鉄道総研報告, Volume：13, Number：3, First page：31, Last page：36, 1999
鉄道総合技術研究所, Japanese
ISSN：0914-2290, CiNii Articles ID：40004709347, CiNii Books ID：AN1008252X - 基礎の入力損失効果を考慮した所要降伏震度スペクトルに関する研究
齊藤正人; 西村昭彦
第25回地震工学研究発表会講演論文集, Volume：1, First page：541, Last page：544, 1999
DOI：https://doi.org/10.11532/proee1997.25.541
DOI ID：10.11532/proee1997.25.541 - 所要降伏震度スペクトルの作成と耐震設計への適用
西村昭彦; 室野剛隆; 齊藤正人
第3回地震時保有耐力法に基づく橋梁の耐震設計に関するシンポジウム講演論文集, Volume：1, First page：43, Last page：48, 1999 - ケーソン基礎・地盤系の地震時復元力特性に関する研究
西山誠冶,齊藤正人,羽矢洋,棚村史郎,西村昭彦
第10回日本地震工学シンポジウム論文集, Volume：3, First page：3103, Last page：3108, 1998 - Study on effective seismic motion of caisson foundation with flexural and rocking motions
SAITOH M.
The 10th Earthquake Engrg. Sym., Proc., 1998, Volume：2, First page：1693, Last page：1698, 1998
CiNii Articles ID：80010720157 - ケーソン基礎・地盤系の地震時復元力特性に関する研究
西山誠冶; 齊藤正人; 羽矢洋; 棚村史郎; 西村昭彦
第10回日本地震工学シンポジウム論文集, Volume：3, First page：3103, Last page：3108, 1998 - A.:Study on Effective Seismic Motion of Caisson Foundation with Flexural and Rocking Motion
Saitoh, M; Murono. Y; Nishimura
The 10th Earthquake Engineering Symposium, Volume：2, First page：1693, Last page：1698, 1998 - Vibration Tests of Pile Foundation Models on a Shaking Table and Numerical Simulation of Them
Watanabe, H; Aoto, K; Saitoh, M
Volume：3, First page：241, Last page：246, 1994 - Vibration Tests of Pile Foundation Models on a Shaking Table and Numerical Simulation of Them
Watanabe, H; Aoto, K; Saitoh, M
The Ninth Japan Earthquake Engineering Symposium, Volume：3, First page：241, Last page：246, 1994
- Lecture Notes in Civil Engineering Volume368, Proceedings of the 6th International Conference on Advances in Civil Engineering
S Arthur, M Saitoh, A Hoque
Springer Singapore, Jan. 2024
Total pages：475
ISBN：9789819938261 - Lecture Notes in Civil Engineering Volume 184 : Advances in Civil Engineering
Scott Arthur, Masato Saitoh, Sudip K. Pal
Springer Singapore, 2022
Total pages：525
ISBN：9789811655463 - Advances in Geotechnical Earthquake Engineering - Soil Liquefaction and Seismic Safety of Dams and Monuments
Masato Saitoh
INTECH, 2012
Responsible for pages：424
- 地震時における構造物の応答抑制を目的とした深層強化学習による非線形デバイスの探索
與羽 将昭、齊藤 正人
土木学会第77回年次学術講演会講演概要集, Sep. 2023, [Domestic conference] - 深層強化学習を用いた多様な地震動に対するセミアクティブ免震システムに関する研究
古賀 弘将、齊藤 正人
土木学会第77回年次学術講演会講演概要集, Sep. 2023, [Domestic conference] - 構造物と周辺地盤の地震応答を利用した 群杭基礎の水平動的ばね特性の推定手法の一提案
齊藤 正人、横田 怜哉、岡本 宙、ゴイト チャンドラ
土木学会第77回年次学術講演会講演概要集, Sep. 2023, [Domestic conference] - ON THE METHOD TO EVALUATE THE POST-EARTHQUAKE STATE OF COLLAPSED STRUCTURES AND ITS APPLICATIONS TO NUMERICAL ANALYSES
Zongmu Liu, Masato Saitoh
Proceeding of 6th International Conference on Advances in Civil Engineering (ICACE-2022), Dec. 2022, [International conference] - 地震応答を利用した群杭基礎の大変形領域における水平動的ばね特性の評価
齊藤正人、横田怜哉、岡本宙、Goit Shekhar Chandra
77回年次学術講演会概要集, Sep. 2022, [Domestic conference] - 深層強化学習を用いた多様な地震動に対する セミアクティブ免震システムの学習方法に関する研究
古賀 弘将、齊藤正人
77回年次学術講演会概要集, Sep. 2022, [Domestic conference] - 多様な地震動に対するアクティブ免震システムの考案と駆動制御法に関する研究
古賀 弘将、齊藤 正人
76回年次学術講演会講演概要集, Sep. 2021, [Domestic conference] - Frequency vs. intensity dependencies of soil-pile systems: Broadening the advanced soilstructure interaction horizon in the light of new experimental findings
Masato Saitoh
Proceedings of The 5th International Conference on Advances in Civil Engineering (ICACE-2020), Mar. 2021, [International conference] - NUMERICAL MODELLING OF THE RATE-DEPENDENT CHARACTERISTICS OF LATERALLY LOADED SINGLE PILES IN DRY SAND
Alok Kumer Saha, Masato Saitoh, Naba Raj Shrestha, Chandra Shekhar Goit
Proceedings of The 5th International Conference on Advances in Civil Engineering (ICACE-2020), Mar. 2021, [International conference] - Mechanism of automatically switching display using earthquake’s motion
Yuki Mizukawa and Masato Saitoh
The 6th International Conference on Engineering, Energy, and Environment 2019, Nov. 2019, [International conference] - 倒壊方向制御構造で危機耐性を向上させた ラーメン高架橋の振動台実験
布川 博一・豊岡 亮洋・齊藤 正人・室野 剛隆
第 22 回橋梁等の耐震設計シンポジウム講演論文集, Jul. 2019, [Domestic conference] - Resilient Structures against Natural Disasters and Its Extension toward SSI
Masato Saitoh
Dec. 2018, [International conference] - SSI Innovation: Beyond the integration of structural inelasticity and frequency-dependency of soil-foundation systems
Masato Saitoh
16th Symposium on Earthquake Engineering, 20-22 December 2018, IIT Roorkee, India, Dec. 2018, [International conference] - 常時微動観測に基づく建物－連絡橋間の相互作用に関する基礎検討
赤坂 大介, 和田 一範, 小野寺 周, 室野 剛隆, 齊藤 正人
第72回年次学術講演会講演概要集, Sep. 2018, [Domestic conference] - 危機耐性に優れた倒壊方向制御構造の振動台実験
豊岡 亮洋,室野 剛隆,寳地 雄大,齊藤 正人
第72回年次学術講演会講演概要集, Sep. 2017, [Domestic conference] - 地震時における構造物の倒壊方向抑制方法に関する解析的評価
劉 宗牧, 齊藤 正人,室野 剛隆
第72回年次学術講演会講演概要集, Sep. 2017, [Domestic conference] - ラーメン高架橋全体系の入力損失効果に関する研究
寳地 雄大,室野 剛隆,齊藤 正人,和田 一範
第72回年次学術講演会講演概要集, Sep. 2017, [Domestic conference] - 強震時における斜杭基礎のキネマティック相互作用に関する実験的検討
渡邊 賢徳,齊藤 正人
第71回年次学術講演会講演概要集, Sep. 2016, [Domestic conference] - 強震動の高振動数成分が杭基礎のキネマティック応答に与 える影響に関する研究
佐藤 絵人, 齊藤 正人
第71回年次学術講演会講演概要集, Sep. 2016, [Domestic conference] - 地震時における構造物の倒壊に対する危機耐性機構の一考察
齊藤正人, 室野剛隆, 本山紘希
第70回年次学術講演会講演概要集, Sep. 2015, [Domestic conference] - Effects of Soil Nonlinearity on the Lateral Impedance Functions of Inclined Single Piles
Chandra Shakhar Goit, Masato Saitoh
第70回年次学術講演会講演概要集, Sep. 2015, [Domestic conference] - Experimental Study on Kinematic Response of Soil-Pile-Superstructure System
Md Shajib Ullah, Masato Saitoh
第70回年次学術講演会講演概要集, Sep. 2015, [Domestic conference] - 単調載荷を受ける構造システムの弾性・弾完全塑性ばねの最大応答変形量とひずみエネルギー分担率のコントロール手法に関する一考察
齊藤正人
第69回年次学術講演会講演概要集, Sep. 2014, [Domestic conference] - TRANSFORMED GYRO-LUMPED PARAMETER MODEL AND ITS APPLICATION TO MULTI-STORY BUILDINGS
Naba Raj Shrestha、Masato Saitoh
第69回年次学術講演会講演概要集, Sep. 2014, [Domestic conference] - 地震動の高振動数成分が杭基礎のキネマティック応答に及ぼす影響に関する研究
佐藤絵人、齊藤正人
第69回年次学術講演会講演概要集, Sep. 2014, [Domestic conference] - 強震時における室内機器等の転倒抑制デバイスの解析的評価
竹村隆一、齊藤正人
第69回年次学術講演会講演概要集, Sep. 2014, [Domestic conference] - 津波や洪水による浸水被害を抑制するための対策法に関する研究開発
中部駿吾、齊藤正人
第69回年次学術講演会講演概要集, Sep. 2014, [Domestic conference] - 地盤の非線形性を考慮した杭間相互作用係数と Superposition Method の適用性に関する実験的研究
齊藤正人, Chandra Goit, George Mylonakis
第68回土木学会全国大会概要集ＣＤ, Sep. 2013, [Domestic conference] - Seismic Behavior of Batter-Pile Foundation: Centrifuge Tests and Analytical Study
Tazoh, T., Sato, M., Jang, J., Taji, Y., Kimata, H., Kobayashi, N., Saitoh, M., Goit, C. and Gazetas, G.
The 3rd International Symposium on Advances in Urban Safety, Nov. 2012, [International conference] - Model tests on validation of principle of superposition in obtaining pile groups’ horizontal impedance functions under soil non-linearity
Goit, C. S., Saitoh, M. and Mylonakis, G.
Proceedings of the International Symposium on Earthquake Engineering, Nov. 2012, [Domestic conference] - Modal lumped parameter models for representing frequency-dependent impedance functions of soil-foundation systems
Masato Saitoh
15th World Conference on Earthquake Engineering, Sep. 2012, [International conference] - 地盤の非線形性を考慮した群杭基礎のインピーダンス特性と動的復元力特性に関する実験的検討
齊藤正人
第６７回土木学会全国大会概要集ＣＤ, Sep. 2012, [Domestic conference] - 振動システムのインピーダンス特性を表現するためのLumped Parameter Model の提案
齊藤正人
第66回年次学術講演会概要集, Sep. 2011 - 直接基礎の動的インピｰダンス特性が構造物の動的応答に及ぼす影響の研究
工藤 昌哉,齊藤正人
第65回年次学術講演会概要集, Sep. 2010 - 杭基礎構造物の振動数依存性が上部構造物の非線形挙動に及ぼす影響について
齊藤正人
第65回年次学術講演会概要集, Sep. 2010 - 3次元有限要素法に基づく慣性力と地盤変形を受ける杭の最適杭径に関する評価
染谷 祥次,齊藤正人
第65回年次学術講演会概要集, Sep. 2010 - 単杭基礎の水平動的ばねの大変形時における収束特性の実験的評価
齊藤正人、Shrestha Raj Naba、Saha Kumer Alok、Goit Shekhar Chandra
70 回年次学術講演会講演概要集, Oct. 2009, [Domestic conference] - 地震動を受ける構造物の高精度な実験シミュレーションのための基礎 地盤系メカニカルインターフェースの構築手法の提案
齊藤正人
第64回土木学会年次学術講演会概要集, Sep. 2009 - 非線形解析に使用可能な振動数依存性を有する基礎 地盤系のパラメータモデルの提案
齊藤正人
第63回土木学会年次学術講演会概要集(CD-ROM), Sep. 2008 - 近接建物群が建築基礎の逸散減衰効果に与える影響の解明
坂田太郎、齊藤正人、川上英二
第62回土木学会年次学術講演会概要集(CD-ROM), Sep. 2007 - 回転慣性免震装置によるクリアランスを抑制した免震システムの評価
齊藤正人
第62回土木学会年次学術講演会概要集(CD-ROM), Sep. 2007 - 近傍地盤の非線形性が最適杭径に及ぼす影響に関する解析的評価
齊藤正人
第61回土木学会年次学術講演会概要集(CD-ROM), Sep. 2006 - 地盤変形と慣性力を同時に受ける杭基礎の最適杭径に関する理論的評価
齊藤正人
第60回土木学会年次学術講演会概要集(CD-ROM), Sep. 2006 - Minimization of Fixed-Head Pile Bending at Optimal Pile Radius
Masato Saitoh
Proceedings of the 1st Greece-Japan Workshop(Athens), Seismic Design,, Aug. 2006 - 基礎構造物への作用荷重が構造物全体系の損傷過程に及ぼす影響に関する研究
千葉一樹,齊藤正人,川上英二
第59回土木学会年次学術講演会概要集(CD-ROM), Sep. 2004 - インテリジェントマテリアルによる基礎構造物の損傷検知手法の開発（その２透水デバイス）
西岡英俊,齊藤正人,村田 修,川上英二,渡辺健治
第59回土木学会年次学術講演会概要集(CD-ROM), Sep. 2004
■ Works
- Gyromass Base Isolation System
TAMA-TLO代表
Oct. 2006 - Gyromass Base Isolation System
齊藤正人
Sep. 2006 - AL-Isolation System
齊藤正人
AL免震は、美術品や文化財、薬品などの地震時における転倒や破損・損壊に対して、これを阻止するための機構です。装置の上に保護対象物を設置しておくと、緊急地震速報を受信した場合、あるいは地震を直接感知することで、対象物を保護する機構が作動します。作動後は、地震の揺れに対して安定した状態を保ちます。本発明の機構は、粒状体群を地震前、あるいは振動を感知した際に変形あるいは移動させることで、保護対象物を緩やかに傾斜あるいは粒状体内に沈降させて、物理的に安定した状態に遷移させるものとなります。 - Vertical Vibration Isolation System
村井英男(共同研究先)
共同研究で開発中の都市直下型地震を対象とした新しい鉛直振動対応の免震システム試作品を、東京ビックサイトで開催された危機管理産業展2018にて出展した。 - Caster Movement-Control System
埼玉大学 齊藤正人、株式会社昭電
埼玉大学と株式会社昭電との共同開発製品「キャスター制動装置」の参考出品を行った。 - Base Islation with Seistic
齊藤正人
産学連携による共同研究成果として、製品リリース前の免震装置とデバイス「サイスティックス」の展示を実施。
- Highly accurate evaluation of dynamic response of foundations subjected to large earthquake ground motions based on small earthquake events
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Apr. 2021 - Mar. 2024
Saitama University
Grant amount(Total)：17030000, Direct funding：13100000, Indirect funding：3930000
Grant number：21H01414 - Highly accurate computational method for dynamic response of structure systems supported by pile foundations allowing yielding behavior in capacity design
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Apr. 2018 - Mar. 2021
Saitoh Masato, Saitama University
Grant amount(Total)：13000000, Direct funding：10000000, Indirect funding：3000000
In recent years, there have been reported that several cases in which foundations were severely damaged during earthquake events. An increase in the amplitude of loading transmitting to soil-foundation systems is attributed to inelastic behavior of the system, thus leading to intricate combination of failure mechanisms and wave propagations. This research conducted experimental and numerical studies of single piles and pile groups for prevailing the relation between yielding procedures and frequency-dependent characteristics in the systems. This study proposed a new phenomenological model that can consider both the intensity and frequency dependencies of the systems. The model was verified by comparing the impedance functions and their convergence trends with the amplitude of loadings obtained from the experiments. This study finally proposed the applicability of the proposed model based on the yielding level.
Grant number：18H01517 - Soil-pile-structure interaction under nonlinearity in soil and developement of method for dynamic response of structural systems
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Apr. 2014 - Mar. 2017
SAITOH Masato, Saitama University
Grant amount(Total)：4940000, Direct funding：3800000, Indirect funding：1140000
This study deals with the mechanism of soil-pile-superstructure interaction subjected to strong ground motions by conducting shaking table tests and analytical approaches. In this study, shaking table tests were conducted first for evaluating the total response of structural systems. Then, an analytical model consisting of one-degree-of-freedom system supported by a sway model was developed. To clarify the mechanism of discrepancies between the test results and analytical results, specific table tests were performed. In the tests, base input and pile-head loading were simultaneously applied to the experimental models. The test results indicate that a new mechanism of soil-pile interaction is generated when nonlinearity in soils and interface nonlinearity occurs: kinematic interaction and inertial interaction are interrelated with each other due to inseparable nonlinear behavior in the system.
Grant number：26420454 - Deformation of overburden and mitigation of structural damage due to fault displacement
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Apr. 2014 - Mar. 2017
Taniyama Hisashi; RAHMAN Md. Aftabar; VAIDYA Kunj Anand, Saitama University
Grant amount(Total)：4940000, Direct funding：3800000, Indirect funding：1140000
The deformation of an overburden subjected to an oblique slip movement was examined . The result showed the possibility of a right step pattern if normal fault displacement with a slight right lateral strike slip fault component was applied to the overburden. When overburden was subjected to a strike slip movement with a slight reverse fault component, large shear deformation and en echelon zones were observed mainly on the footwall side of the overburden in a narrower zone. The analytically obtained width of the high strain zone was comparable to the observed width at the Nojima fault.
Response of buried pipeline owing to fault movement was examined by numerical simulation. The results showed relation between force acting on the pipe and pipe-soil relative displacement. Effectiveness of flexible joints on pipe has been examined. The reduction in strains of the pipes is seen more efficient when the flexible joint is placed near the fault activation plane.
Grant number：26420453 - 強震時における高層建物支持機構の解明と非線形メカニカルインターフェースの創成
Apr. 2015 - Mar. 2016
Grant amount(Total)：1200000, Direct funding：1200000
Grant number：15F14367 - Experimental Evaluation of Pile-to-Pile Interaction and Impedance Functions with Local Nonlinearity in Soils
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 2011 - 2013
SAITOH Masato, Saitama University
Grant amount(Total)：5460000, Direct funding：4200000, Indirect funding：1260000
This study dealt with impedance functions (IFs) of pile groups subjected to strong vibrations due to earthquakes. IFs are defined as dynamic stiffness and damping representing dynamic characteristics at the interface between superstructure and soil-foundation systems. In general, impedance functions have been evaluated under linear-elastic conditions of soils. However, in accordance with the recent earthquake events, strong ground motions and resultant high amplitude of structural response may generate strong nonlinearity in soils near the piles. Therefore, this study conducted model tests on fixed-head floating piles embedded in cohesionless soil carried out under 1-g conditions, to investigate the effects of local soil nonlinearity on the impedance characteristics of pile groups. Results obtained from such tests indicate that soil nonlinearity markedly change impedance characteristics.
Grant number：23560562 - Research on earthquake resistant adobe structure by using combination of fiber reinforced plaster and fiber strings
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 2009 - 2011
IWASHITA Kazuyoshi; TANIYAMA Hisashi; SAITOU Masato, Saitama University
Grant amount(Total)：4680000, Direct funding：3600000, Indirect funding：1080000
To integrate seismic resistance of adobe structure, the combination of external reinforcement by the fiber net and fiber reinforced mud plaster was studied. The aim of tow method is both to increase the strength of structure and to decrease the initial cracking of mud plaster. Static bending test of adobe column and drawing test of strings from mud plaster were done to build the relational expression for earthquake performance of reinforced adobe structure. As a result, the required amount of strings can be determined for many materials. The fixing ability of fiber reinforced mud plaster is not enough to resist at the yielding failure state of adobe structure. To integrate the fixing, wire binding through wall or column is good enough.
Grant number：21560497 - Damage to Reinforced Concrete Piers Due To Earthquake After Strengthening
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 2009 - 2011
MUTSUYOSHI Hiroshi; MAKI Takeshi; SAITO Masato, Saitama University
Grant amount(Total)：18200000, Direct funding：14000000, Indirect funding：4200000
This study focuses on the seismic behavior of reinforced concrete (RC) bridge piers and foundations based on pseudo-dynamic (PSD) tests. It was found that the foundation suffers increased hysteretic response when pier strengthening is applied.
Grant number：21360210 - Evaluation of extent of damage in geogrid reinforced soil walls subjected to earthquakes
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 2008 - 2010
KUWANO Jiro; SAITO Masahito; IZAWA Jun; TACHIBANA Shinya, Saitama University
Grant amount(Total)：18850000, Direct funding：14500000, Indirect funding：4350000
In this study, evaluation of degree of damage in GRSW is discussed. Shear strain of backfill material in the reinforced area is evaluated from the horizontal displacement of the wall. Then, occurrence of the slip line is decided based on the simple plastic theory. Since the past studies show that seismic stability of the GRSW depends upon the pullout resistance between geogrid and backfill material after the generation of slip line in the backfill, seismic stability of the GRSW having slip line in the reinforced area is evaluated from the results of the pullout test. Finally, the validity of the proposed method was verified with results of some centrifuge shaking table tests.
Grant number：20360208 - Construction of Mechanical Interface Representing Soil-Foundation Systems and Experimental Study on Dynamic Response of Structures during Earthquakes
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (A), 2008 - 2009
SAITOH Masato, Saitama University
Grant amount(Total)：26000000, Direct funding：20000000, Indirect funding：6000000
A mechanical interface representing soil-foundation systems is constructed based on the previously-published paper titled "Masato Saitoh, Simple Model of Frequency-Dependent Impedance Functions in Soil-Structure Interaction Using Frequency-Independent Elements,Journal of Engineering Mechanics, ASCE". The results of this study found a large number of difficulties and their solutions when the mechanical interface is designed and constructed.
Grant number：20686031 - 強震動による地盤変形と慣性力を受ける杭基礎の損傷低減のための最適杭径に関する研究
2006 - 2007
Grant amount(Total)：3600000, Direct funding：3600000
Grant number：18760344 - Study on deformation of subsurface layer by faulting and mitigation of damage to structures due to fault displacement
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 2005 - 2007
TANIYAMA Hisashi; SAITO Masato; MAKI Takeshi, Saitama University
Grant amount(Total)：3710000, Direct funding：3500000, Indirect funding：210000
The following research results were obtained. 1. Stress change history of the 2000 Tottori-ken Seibu earthquake was estimated directly from the observed strong motion records. It was hind that the large stress drop occurred in the upper central part and lower part of the fault and that the stress dropped monotonically within 1-1.5 s. 2. Development of shear bands in the subsurface layer due to strike slip fault was examined using DEM analysis. In the sediment model of distinct elements, concave-upward shear zones which developed from the basement fault on bath sides of the fault were observed first and were followed by a helicoidally shaped shear. The helicoidally shaped shear (Riedel shear) propagated through the sediment model and broke the surface. With increasing basement displacement, shear zone striking at lower angle to the basement fault developed at surface. The geometry and sequence of these shears agreed with those observed in sandbox tests. It was hind that the development of ship shape structures (shear zones which developed from the basement fault on both sides of the fault) and Riedel shears was attributable to the stress due to dilatancy and the shear in the vertical plane along with the lateral shear. 3. Model tests of strike slip fault showed that the location and amount of slip farmed in model sediments due to basement fault changed by replacing part of the model sediment with ground material which had different properties. 4. 3-D finite element analyses were carried out to investigate the seismic response of piles. Nonlinear material properties and interaction were incorporated. It was shown that the numerical analysis simulated fairly well the actual behavior of pile-soil system with proper consideration of nonlinear material property and that the dynamic and static analyses gave different ground strain.
Grant number：17560421 - Study on Time-Space Variations of Earthquake Waves Considering Non-Uniformity of Ground Surface Conditions
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 2005 - 2007
KAWAKAMI Hideji; IWASHITA Kazuyosi; MOGI Hidenori; TANIYAMA Hisashi; SAITO Masato, Saitama University
Grant amount(Total)：13520000, Direct funding：12800000, Indirect funding：720000
The purpose of this study is to clarify the effects of the conditions of the ground surface on the earthquake ground motions. Irregular shaped ground, lots of trees and buildings, Which are existing ordinally at the ground surface, were considered in this study. Even if it has been pointed out previously that the ground with an irregular surface may cause complicated seismic responses, the process of generating this complex response has not yet been clarified. In this study, such a process was also examined.
Regarding the effects of the irregular ground surface, for example, it has been pointed out that the ground with an irregular surface causes complicated seismic responses. However, the process of generating this complex response is not yet clarified. In this study, boundary element-perturbation method has been developed to investigate scattering of seismic waves due to an irregular surface. This method is based on the boundary element method in frequency domain and perturbation technique employing the Neumann series. By using this method, the ground response can be separated into those induced by incident waves and scattered waves. Numerical results showed that the amplitudes of the scattered waves are affected by both distance and direction of the irregular surface to the observation points.
Grant number：17360209 - 強震時における大型基礎の入力損失効果が構造物の損傷被害に及ぼす影響の解明と検証
2004 - 2005
Grant amount(Total)：2600000, Direct funding：2600000
Grant number：16760367 - Earthquake Response Analysis of Whole Structural System for Reinforced Concrete Structures
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 2004 - 2005
MUTSUYOSHI Hiroshi; MAEKAWA Kouichi; WAKAI Akihiko; SAITOU Masato; MAKI Takeshi, SAITAMA UNIVERSITY
Grant amount(Total)：11100000, Direct funding：11100000
Recent earthquakes have stressed the importance of conducting response analysis of a whole structural system including structure, foundation and ground for the performance based design of a structure. For the development of a realistic analytical method, however, it is first imperative to clarify the behavior of pile and soil during earthquakes. The main objectives of this research are to study the seismic behavior of concrete pile and soil using full-scaled lateral loading test and to establish an analysis procedure based on the experiment. Full-scale lateral loading tests were carried out on concrete piles embedded into cohesive soil. Two of the piles were embedded into the ground using inside drilling technique, whereas other two piles were embedded using outside drilling technique with bentonite-cement paste around the pile and soil. The results of the experiments revealed that the lateral load carrying capacity of piles significantly degrades when subjected to cyclic loading compared to the monotonic loading. Three-dimensional non-linear finite element analysis was then carried out to study the behavior of experimental specimens analytically. The analysis implied that interface element should be used between pile and soil surface to simulate the gap formation between the soil and pile. Moreover, the analysis also showed that if the degradation in soil stiffness due to cyclic loading is ignored, the analysis highly overestimates the lateral loading capacity of the pile. It was also found that for the outside-boring pile, bentonite-cement layer has to be considered in the analysis to obtain the actual lateral behavior of pile.
Grant number：16360222 - The effects of surface geometry tree and buildings on distribution of wave propagation
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 2002 - 2004
IWASHTTA Kazuyoshi; KAWAKAMI Hideji; MOGI Hidenori; TANIYAMA Hisashi; SAITOH Masato, Saitama University
Grant amount(Total)：10500000, Direct funding：10500000
It is well known that the most fundamental and important problem in the seismic engineering is estimation of the surface ground motion caused by earthquake. Usually, to evaluate the surface ground motion and wave propagation in the surface layer, the ground is modeled as the very simple flay layer system, while the real surface ground is quite irregularly shaped. And the programs, like as SHAKE, based on the wave propagation in simple layer system are applied. In those cases, the ground is assumed as flat and there is nothing on the surface. There are many local and micro geographical features on the ground surface. On the ground, there may be many trees, forests, houses and buildings. There is a possibility that wave propagation is affected these features, In this study, the effects of these omitted phenomena on the wave propagations are evaluated.
Seismic responses of a ground with various types of sinusoidal shaped irregularity were evaluated by using the boundary element method and analyzed based on "scattered-wave contribution". The examination of the numerical results revealed the following : 1)the response at the trough varies sharply with frequency whereas the response at the peak shows large amplification over a wide frequency range ; 2)the predominant frequencies at the trough depend on the amplitude of the surface irregularity and do not depend on the number of fluctuations of the ground ; and 3)these characteristics can be understood as the results of the interference of scattered waves coming from the irregular surface.
Peak ground acceleration(PGA) as a measure of earthquake motion intensity is an important factor in the earthquake-resistant design and reliability analysis of structures. The purpose of this article is to examine the spatial variability of PGAS (recorded at the same epicentral distance) as a function of separation distance. To do this, we define PGA ratios as spatial intraevent variations of PGAS and examine their statistical characteristics. We analyze the probability distribution of the ratios and formulate equations for their probability density functions, mean values, standard deviations, and percentiles. These statistics are then estimated using accelerometer arrays of the Chiba, SMART-1, and SIGNAL databases. Then, the relationship between these statistics and the station separation distances is analyzed. We found that the means and standard deviations have an almost linear relationship with the logarithm of the station separation distances ranging from several meters to 100 km. Finally, based on the fiftieth and ninety-fifth percentiles, the differences between PGAS at two different sites due to future earthquakes are discussed.
Grant number：14350237 - 地上構造物や樹木などの不規則分布を考慮した地震外力の推定手法の開発
2001 - 2002
Grant amount(Total)：2100000, Direct funding：2100000
Grant number：13878079 - -
Competitive research funding - -
Competitive research funding
- 弾性機構
齊藤正人, Patent right
Patent/Registration no：US10,879,588, JST支援対象の登録特許である。メカニカルな機構を用いた定荷重ばねであり、用途としては自重を支えなが... - 支持システム及び支持方法
齊藤 正人, 村井 和男, 今西 圭一, Patent right
地震速報もしくは地震動を直接感知すると、展示物や構造体を安定な位置、安定な状態に遷移させて地震から守... - 変位抑制装置及び免震システム
齊藤正人, 村井和男, Patent right
発明は、従来の免震システムで問題となっている長周期地震動による共振現象に対して、これを阻止し、過大な... - 変位抑制装置、免震システム及び負復元力機構
齊藤正人、Nepal Sandhya, 村井和男, Patent right
直下型地震と長周期地震動に対応した負復元力による新免震システムの特許であり、 様々な地震動に対する... - 弾性機構
齊藤正人, Patent right
可変式定荷重ばね機構、可変式正負ばね機構の特許、企業との共同研究により製品化を進めている。 - 建造物
齊藤正人、室野剛隆、本山紘希, Patent right
レジリエント社会を構築するために必要なプログラマブル構造として、指定した一方向に倒壊するように制御可... - キャスター付機能及びキャスター
齊藤正人、村井和男, Patent right
医療機器などストッパーの定常固定が難しい機器について、直下型地震動や長周期地震動に対して移動量を抑制... - 変位抑制装置
齊藤正人, Patent right
Patent/Registration no：第5659090, 断層直下地震と長周期地震動の両方の地震動に対して有効な免震装置と免震用デバイスに関する特許であり、す... - 変位抑制装置及び免震装置
齊藤正人、村井和男, Patent right
大型構造体に対する、断層直下地震ならびに長周期地震動に対応した免震システムならびに免震デバイスに関す... - 変位制御装置及び変位制御システム
齊藤正人、村井和男, Patent right
断層直下地震と長周期地震動の両方の地震動に対して有効な免震装置と免震用デバイスに関する特許であり、す... - キャスター付き機器及び回転慣性付加装置
齊藤正人, Patent right
本発明の目的は、相対変位を好適に抑制できるキャスター付き機器及び回転慣性付加装置を提供することにある... - キャスター付機器、免震用支承装置、免震対象物の変位抑制装置、免震対象物の変位抑制ユニット及び回転慣性...
齊藤正人, Patent right
本発明の目的は、相対変位を抑制可能なキャスター付き機器、免震用支承装置、免震対象物の変位抑制装置、... - キャスター付き機器及び回転慣性付加装置
齊藤正人, Patent right
強震時におけるキャスター付き機器の過大な変位量を抑制するためのアーム型免震システムの発明。回転慣性と... - キャスター付機器、免震用支承装置、免震対象物の変位抑制装置
齊藤正人角田敦, Patent right
キャスター付機器、免震用支承装置、免震対象物の地震時における過大な変位を抑制するための装置。 - 振り子型免震装置
齊藤正人, Patent right
振り子型免震装置が強震動や長周期地震動を受けたときに生じる過大な変位を抑制するための回転慣性と摩擦の... - 免震装置及び回転慣性付加装置
齊藤正人, Patent right
本発明は、滑り支承や転がり支承等により免震対象物を支持し、地震等による免震対象物の振動を長周期化させ... - 解析システム、解析方法、プログラムおよび機械装置
齊藤正人, Patent right
本特許申請は、国際特許（PCT）出願としてJSTから許可されたものである。建物を支持する地盤構造の波... - 構造物外力検知装置、及び構造物の外力検知方法
齊藤正人、渡辺健治, Patent right
Patent/Registration no：特許第4076779号, 災害後に構造物の被害状況を把握するための装置と方法に関する特許であり、圧電材料を含む2重管構造を利用して、検知部位の損傷と部材損傷の程度を把握するものである。 - 構造物外力検知装置、及び構造物の外力検知方法
齊藤正人、西岡英俊、渡辺健治, Patent right
Patent/Registration no：特許第4039965号, 災害後に構造物の被害状況を把握するための装置と方法に関する特許であり、吸水性ポリマーを含む2重管構造を利用して、検知部位の損傷と部材損傷の程度を把握するものである。 - 構造物外力検知装置、及び構造物の外力検知方法
齊藤正人、西岡英俊、渡辺健治, Patent right
Patent/Registration no：特許第4039964号, 災害後に構造物の被害状況を把握するための装置と方法に関する特許であり、形状記憶合金を含む2重管構造を利用して、検知部位の損傷と部材損傷の程度を把握するものである。
- 特集コーナー『県政の課題「災害対策」～首都直下地震への対応は～』コメント
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10月7日の夜、埼玉県南部などで震度5強を観測した地震について, 10月7日の夜、埼玉県南部などで震度5強を観測した地震について - 未定
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建設通信新聞, 28 Oct. 2015
地域から／埼玉大学大学院理工学研究科教授 齊藤正人氏, 地域から／埼玉大学大学院理工学研究科教授 齊藤正人氏 - 未定
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自然災害に強いレジリエンス都市を実現するためのプログラマブル・ストラクチャの考案と開発, 自然災害に強いレジリエンス都市を実現するためのプログラマブル・ストラクチャの考案と開発 - 未定
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直下型・長周期地震から電子機器守る 埼玉大が免震装置, 直下型・長周期地震から電子機器守る 埼玉大が免震装置 - 未定
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埼玉大、昭電とサーバルームラック用免震装置を開発, 埼玉大、昭電とサーバルームラック用免震装置を開発