Strain based damage indicators for finite element analysis of reinforced concrete structures Shigehiko Saito; Takeshi Maki; Satoshi Tsuchiya; Tadatomo Watanabe
Structures,
巻:58,
開始ページ:105473,
終了ページ:105473, 2023年12月,
[査読有り]Elsevier BV, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1016/j.istruc.2023.105473DOI ID:10.1016/j.istruc.2023.105473,
ISSN:2352-0124 Flexural Behavior of Precast Concrete Slab Connections using Loop Steel Bars and MortarQuang-Thinh Nguyen; Takeshi Maki; Hiroshi Mutsuyoshi; Yosuke Ishihara
Journal of Advanced Concrete Technology,
巻:21,
号:6,
開始ページ:436,
終了ページ:449, 2023年06月,
[査読有り]Japan Concrete Institute, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.3151/jact.21.436DOI ID:10.3151/jact.21.436,
ISSN:1346-8014,
eISSN:1347-3913 Effect of Joint Flexibility on Seismic Performance of a Reinforced Concrete Ductile Moment-Resisting FrameDagvabazar Gombosuren; Takeshi Maki
Advances in Materials Science and Engineering,
巻:2022,
開始ページ:1,
終了ページ:21, 2022年12月,
[査読有り]Currently, the seismic collapse risk of modern code-conforming reinforced concrete (RC) frame structures is often evaluated without considering the behavior of the beam-column (BC) joints since joints designed to meet modern concrete design codes are assumed to be sufficiently rigid. BC joints in RC ductile moment frames may undergo a significant amount of inclined cracking during strong earthquakes. Consequently, the stiffness, strength, and dynamic characteristics of the RC moment frames may vary. Hence, the rigid joint assumption may be unsuitable for assessing the seismic performances of RC ductile moment frames because the local strength and ductility demands of the constituent members can be misinterpreted by structural analyses based on the assumption of a rigid joint. In this study, nonlinear static and dynamic analyses are conducted to quantify the seismic response variations of low- to midrise RC-frame structures under different joint modeling assumptions. In total, six 2D continuum finite element models of four- and eight-story frames with rigid and flexible joints were constructed by simulating the actual structures as realistically as possible. The results indicate that the interior joints in the considered frames suffer light-to-moderate damage, and the effect of joint cracking is found to be significant in a four-story structure whose column-to-beam flexural strength ratio and column-to-beam area ratio are below 1.5. Such joint behavior demonstrates that current code provisions cannot ensure joint behavior compatible with the rigid joint assumption that is used in the practical structural analysis of RC-frame buildings.
Hindawi Limited, 研究論文(学術雑誌)
DOI:https://doi.org/10.1155/2022/6858283DOI ID:10.1155/2022/6858283,
ISSN:1687-8434,
eISSN:1687-8442 Investigation into vibration-based structural damage identification and amplitude-dependent damping ratio of reinforced concrete bridge deck slab under different loading statesSania Gohar; Yasunao Matsumoto; Takeshi Maki; Satoru Sakuma
Journal of Civil Structural Health Monitoring,
巻:13,
号:1,
開始ページ:133,
終了ページ:148, 2022年09月,
[査読有り]Springer Science and Business Media LLC, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1007/s13349-022-00625-wDOI ID:10.1007/s13349-022-00625-w,
ISSN:2190-5452,
eISSN:2190-5479 Effects of particle size and type of aggregate on mechanical properties and environmental safety of unbound road base and subbase materials: A literature review
Thai, H. N.; Kato, A.; Nguyen, H. G.; Nruyen, T. D.; Tong, T. K.; Nguyen, V. T.; Uchimura, T.; Maki, T.; Kawamoto, K.
International Journal of GEOMATE, 巻:20, 号:78, 開始ページ:148, 終了ページ:157, 2021年02月, [査読有り]
英語
Prediction of Joint Shear Deformation Index of RC Beam–Column JointsDagvabazar Gombosuren; Takeshi Maki
Buildings,
巻:10,
号:10,
開始ページ:176,
終了ページ:176, 2020年10月,
[査読有り]In the analysis of reinforced concrete (RC) buildings, beam–column joints are regarded as rigid nodes. In fact, joint deformation may make a significant difference in the lateral response of RC buildings if joints are not properly designed and detailed. To consider joint flexibility, several types of joint models have been proposed. However, these models require complicated computations, consequently making them challenging to apply in engineering practice. This paper proposed a simple approach for predicting the contribution of the joint deformation to the total deformation of RC interior beam–column joints under critical structural deformations. To develop such a simple and accurate approach, experimental and analytical studies were performed on RC interior beam–column joints. In this study, eight half-scale joint specimens were tested under reversed cyclic loading, and 39 full–scale FE models were constructed, varying the selected key parameters. The experimental and analytical results showed that the “joint shear” is a useful index for the beam–column joints with high shear stress levels of vj>1.7 fc′ but is unsuitable for defining the failure of beam–column joints with medium or low shear stress levels of vj≈1.25–1.7fc′ and vj≈1.0fc′. Based on the results, three equations were developed to predict the joint shear deformation index (SDI) of RC interior beam–column connections corresponding to three different types of failure (i.e., joint failure before beam yielding, joint failure after beam yielding, and beam flexural failure). SDI predictions of the proposed equations correlate well with 50 test results of beam–column joints available from the literature.
MDPI AG, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.3390/buildings10100176DOI ID:10.3390/buildings10100176,
eISSN:2075-5309 Influence of reinforcement arrangement details on mechanical behavior of precast concrete barrier with loop connection S. Basit; T. Maki; H. Mutsuyoshi; Y. Ishihara; H. Tajima
Structures,
巻:27,
開始ページ:1682,
終了ページ:1692, 2020年10月,
[査読有り]Elsevier BV, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1016/j.istruc.2020.08.003DOI ID:10.1016/j.istruc.2020.08.003,
ISSN:2352-0124 Experimental study on time-dependent deformation of hybrid steel–PRC girder with headed stud shear connections under sustained loading Mohammad Najmol Haque; Takeshi Maki
Structures,
巻:22,
開始ページ:327,
終了ページ:340, 2019年12月,
[査読有り]Elsevier BV, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1016/j.istruc.2019.09.004DOI ID:10.1016/j.istruc.2019.09.004,
ISSN:2352-0124 Finite Element Approach to Evaluate Time Dependent Shear Behavior of Connections in Hybrid Steel-PC Girder under Sustained Loading
Mohammad Najmol Haque; Takeshi Maki; Jun Sasaki
International Journal of Architectural, Civil and Construction Sciences, 巻:12.0, 号:9, 開始ページ:565, 終了ページ:574, 2019年09月, [査読有り]
英語, 研究論文(国際会議プロシーディングス)
Use of cement-treated sand to enhance the lateral capacity of pile foundationsKhawaja Adeel Tariq; Takeshi Maki
International Journal of Physical Modelling in Geotechnics,
巻:19,
号:5,
開始ページ:221,
終了ページ:233, 2019年09月,
[査読有り]Cement-treated sand is a material used for increasing the axial and lateral capacity of the ground around piles. Piles are commonly used to carry the axial load; however, in some structures, the lateral capacity of the pile is also important. This study investigates improving the lateral capacity of a single pile using cement-treated sand. Cement-treated sand was cast using high-early-strength cement, sand and limestone powder. Displacement-controlled lateral cyclic-load tests were performed on piles embedded in sand compacted to 70% of its relative density, and on piles embedded in cement-treated sand. The volume of cement-treated sand was varied to determine its effect on the lateral capacity of the pile. The flexural stiffness of the pile also affected its lateral capacity. The lateral capacity of the pile embedded in the cement-treated sand was five times greater than that of the piles surrounded by sand. The area and depth of improved ground around the pile strongly affected the increase in the lateral capacity of the pile. The results have indicated that the use of cement-treated sand can improve the lateral capacity of the pile and volume of the improved ground should be carefully designed, keeping in mind the ground conditions.
Thomas Telford Ltd., 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1680/jphmg.17.00020DOI ID:10.1680/jphmg.17.00020,
ISSN:1346-213X,
eISSN:2042-6550 Development of effective precast concrete barrier wall thickness for existing bridge
Basit, S.; Maki, T.; Mutsuyoshi, H.; Ishihara, Y.; Tajima, H.
Journal of Structural Engineering, JSCE, 巻:65A, 開始ページ:579, 終了ページ:588, 2019年03月, [査読有り]
英語
Seismic Response of RC Bridge Piers Considering Soil-Pile InteractionMaki, T.; Mutsuyoshi, H.; Chotesuwan, A.
SP-313 Proceedings of the First ACI & JCI Joint Seminar: Design of Concrete Structures Against Earthquake and Tsunami Damage,
開始ページ:9.1,
終了ページ:9.12, 2017年03月,
[査読有り],
[招待有り],
[筆頭著者]American Concrete Institute, 英語, 研究論文(国際会議プロシーディングス)
DOI:https://doi.org/10.14359/51689691DOI ID:10.14359/51689691 Effect of creep induction at an early age on subsequent prestress loss and structural response of prestressed concrete beam Shingo Asamoto; Kyosuke Kato; Takeshi Maki
Construction and Building Materials,
巻:70,
開始ページ:158,
終了ページ:164, 2014年11月,
[査読有り]Elsevier BV, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1016/j.conbuildmat.2014.07.028DOI ID:10.1016/j.conbuildmat.2014.07.028,
ISSN:0950-0618 Mechanical behaviour of cement-treated sand K.A. Tariq; T. Maki
Construction and Building Materials,
巻:58,
開始ページ:54,
終了ページ:63, 2014年05月,
[査読有り]Elsevier BV, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1016/j.conbuildmat.2014.02.017DOI ID:10.1016/j.conbuildmat.2014.02.017,
ISSN:0950-0618 Numerical modelling and full-scale testing of concrete piles under lateral loading Rabin Tuladhar; H. Mutsuyoshi; T. Maki
Australian Journal of Structural Engineering,
巻:14,
号:3,
開始ページ:229,
終了ページ:242, 2013年,
[査読有り]Engineers Media, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.7158/S12-022.2013.14.3DOI ID:10.7158/S12-022.2013.14.3,
ISSN:1328-7982,
SCOPUS ID:84886285238 Seismic behavior of bridges with pier and foundation strengthening: PsD tests and analytical study Anawat Chotesuwan; Hiroshi Mutsuyoshi; Takeshi Maki
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS,
巻:41,
号:2,
開始ページ:279,
終了ページ:294, 2012年02月,
[査読有り]英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1002/eqe.1129DOI ID:10.1002/eqe.1129,
ISSN:0098-8847,
Web of Science ID:WOS:000299070700007 Seismic performance of bond controlled RC columns G. R. Pandey; H. Mutsuyoshi; T. Maki
ENGINEERING STRUCTURES,
巻:30,
号:9,
開始ページ:2538,
終了ページ:2547, 2008年09月,
[査読有り],
[国際誌]英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1016/j.engstruct.2008.02.001DOI ID:10.1016/j.engstruct.2008.02.001,
ISSN:0141-0296,
CiNii Articles ID:80019789585,
Web of Science ID:WOS:000259631200025 Cyclic behavior of laterally loaded concrete piles embedded into cohesive soil Rabin Tuladhar; Takeshi Maki; Hiroshi Mutsuyoshi
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS,
巻:37,
号:1,
開始ページ:43,
終了ページ:59, 2008年01月,
[査読有り]英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1002/eqe.744DOI ID:10.1002/eqe.744,
ISSN:0098-8847,
CiNii Articles ID:120001370822,
Web of Science ID:WOS:000252939000003 RC pile-soil interaction analysis using a 3D-finite element method with fibre theory-based beam elements Takeshi Maki; Koichi Maekawa; Hiroshi Mutsuyoshi
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS,
巻:35,
号:13,
開始ページ:1587,
終了ページ:1607, 2006年11月,
[査読有り],
[筆頭著者]英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.1002/eqe.588DOI ID:10.1002/eqe.588,
ISSN:0098-8847,
CiNii Articles ID:120001370379,
Web of Science ID:WOS:000241918000001 Seismic behavior of reinforced concrete piles under ground Takeshi Maki; Hiroshi Mutsuyoshi
Journal of Advanced Concrete Technology,
巻:2,
号:1,
開始ページ:37,
終了ページ:47, 2004年04月,
[査読有り],
[筆頭著者]Japan Concrete Institute, 英語, 研究論文(学術雑誌)
DOI:https://doi.org/10.3151/jact.2.37DOI ID:10.3151/jact.2.37,
ISSN:1346-8014,
CiNii Articles ID:130000080173,
SCOPUS ID:12344281997
水中におけるRC柱の動的応答性状に関する研究 牧 剛史; 早坂 雅俊; 中村 慎
構造工学論文集 A,
巻:62,
開始ページ:885,
終了ページ:895, 2016年,
[査読有り]The objective of this paper is to clarify dynamic response behavior of RC columns under water. The dynamic reversed cyclic loading test of RC column specimens has been conducted. The specimen in water subjected to lateral loads with dispalcement rate of 500mm/sec exhibited lower ductility than the specimen in air. This might be due to the internal water pressure in carcks together with the loss of friction and interlocking. Dynamic water pressure induced by crack opening-closing was also examined by conducting dynamic loading test as well as numerical calculation using SPH method.
公益社団法人 土木学会, 日本語
DOI:https://doi.org/10.11532/structcivil.62A.885DOI ID:10.11532/structcivil.62A.885,
ISSN:1881-6614,
CiNii Articles ID:130005608060,
CiNii Books ID:AA12210243 少数主桁形式の鋼合成桁とPC桁のずれ止め方式による接合構造の研究 篠崎 裕生; 浅井 洋; 紙永 祐紀; 牧 剛史; 睦好 宏史
構造工学論文集 A,
巻:60,
開始ページ:861,
終了ページ:871, 2014年,
[査読有り]Authors devised the joint of composite steel girder and PC girder using shear connecting method. In this paper, simplified design methods of shear connector located in the joint are proposed and verified through loading test of the 1/2 scaled model together with three-dimensional nonlinear finite element analyses. Further, it is proved that new shear connecting method using mortal filled steel tube inserted in perforated steel plate are available for shear connector at web steel plate of joint.
公益社団法人 土木学会, 日本語
DOI:https://doi.org/10.11532/structcivil.60A.861DOI ID:10.11532/structcivil.60A.861,
ISSN:1881-6614,
CiNii Articles ID:130005438932 耐震補強された高速道路橋梁の耐震安全性に関する研究
牧 剛史; 睦好 宏史; Chotesuwan, A.
高速道路と自動車, 巻:53, 号:9, 開始ページ:18, 終了ページ:24, 2010年, [査読有り], [筆頭著者]
日本語
3次元非線形有限要素法を用いたRC杭基礎-地盤系の連成地震応答解析
牧 剛史; 土屋 智史; 渡辺 忠朋; 前川 宏一
土木学会論文集A, 巻:64, 号:2, 開始ページ:192, 終了ページ:207, 2008年, [査読有り], [筆頭著者]
実地盤中に設置された実大コンクリート杭の杭頭水平復元力特性と変形性状
牧 剛史; 睦好 宏史; Rabin TULADHAR; 醍醐 宏治
土木学会論文集E, 巻:63, 号:3, 開始ページ:396, 終了ページ:409, 2007年, [査読有り], [筆頭著者]
鉄筋の付着を制御することによるRC柱部材の耐震性状改善に関する研究
睦好 宏史; 牧 剛史; Pandey, G. R.; 杉田 清隆
土木学会論文集, 巻:802, 号:V-69, 開始ページ:155, 終了ページ:169, 2005年11月, [査読有り]
RCラーメン橋脚におけるはり部耐震補強に関する研究
睦好 宏史; 牧 剛史; 山田 伝一郎; 小西 由人; 藤田 亮一
土木学会論文集, 巻:746, 号:V-61, 開始ページ:215, 終了ページ:228, 2003年11月, [査読有り]
RC杭体-地盤相互作用解析における線材モデルの適用性 牧 剛史; 睦好 宏史; 前川 宏一
土木学会論文集,
巻:746,
号:V-61,
開始ページ:57,
終了ページ:70, 2003年11月,
[査読有り],
[筆頭著者]鉄筋コンクリート構造物全体系の応答解析手法の確立を見据え, 杭体-地盤界面における非線形局所挙動を含むRC杭の非線形応答解析に, 線材モデル (fiber model) がどの程度適用できるかを, 既往の載荷実験結果との比較から総合的に検討を行った. 杭体-地盤間の界面剥離 (No Tension) が構造応答に及ぼす影響は小さくはなく, 杭体に生じる最大損傷深さが深いほど, その影響が顕著に表れることを明らかにした. さらに, 杭-地盤系の数値応答評価への適用を念頭に置き, 本論文で用いた解析モデルに対して, 推定精度の検討を行った.
土木学会, 日本語
DOI:https://doi.org/10.2208/jscej.2003.746_57DOI ID:10.2208/jscej.2003.746_57,
ISSN:0289-7806,
CiNii Articles ID:10012472994,
CiNii Books ID:AN10014020 鉄筋コンクリート杭の水平復元力特性と変形性状に関する研究
牧 剛史; 睦好 宏史
土木学会論文集, 巻:683, 号:V-52, 開始ページ:103, 終了ページ:118, 2001年08月, [査読有り], [筆頭著者]
プレストレスを導入した鉄筋コンクリート橋脚の耐震性状
睦好 宏史; W. A. Zatar; 牧 剛史
土木学会論文集, 巻:669, 号:V-50, 開始ページ:27, 終了ページ:38, 2001年02月, [査読有り]
吹付けコンクリートのリバウンド評価に対する2次元個別要素法の適用
牧 剛史; 魚本健人
土木学会論文集, 巻:620, 号:V-43, 開始ページ:109, 終了ページ:118, 1999年05月, [査読有り], [筆頭著者]
日本語