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1.苏州科技大学土木工程学院,江苏 苏州 215011
2.中建八局第三建设有限公司苏南分公司,江苏 苏州 215021
Received:29 March 2023,
Revised:2023-05-28,
Published:15 October 2024
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蔡新江,陈磊,毛小勇等.柱脚不同连接形式钢框架‑摇摆墙结构抗震性能对比分析[J].防灾减灾工程学报,2024,44(05):1062-1071.
CAI Xinjiang,CHEN Lei,MAO Xiaoyong,et al.Comparative Analysis of Seismic Performance of Steel Frame‑Rocking Wall Structures with Different Connection Forms of Column Foot[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(05):1062-1071.
蔡新江,陈磊,毛小勇等.柱脚不同连接形式钢框架‑摇摆墙结构抗震性能对比分析[J].防灾减灾工程学报,2024,44(05):1062-1071. DOI: 10.13409/j.cnki.jdpme.20230329004.
CAI Xinjiang,CHEN Lei,MAO Xiaoyong,et al.Comparative Analysis of Seismic Performance of Steel Frame‑Rocking Wall Structures with Different Connection Forms of Column Foot[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(05):1062-1071. DOI: 10.13409/j.cnki.jdpme.20230329004.
增设摇摆墙后框架结构地震下柱脚仍会发生一定程度的塑性损伤,将柱脚设置为铰接或提离后有望减轻上述缺陷。以三层、六层和九层钢框架为基准模型,分别建立柱脚固接、铰接及提离三种框架‑摇摆墙结构模型并进行动力弹塑性时程分析,对比各结构最大侧向位移、层间位移角、峰值加速度、层间剪力、墙体剪力和弯矩等;进一步建立耗能连梁固接和铰接的对比模型,研究连梁连接方式对结构抗震性能的影响。结果表明:三层模型中柱脚固接时侧向位移、层间位移角、加速度、层间剪力及摇摆墙墙体剪力的控制效果最优,六层、九层模型中分别对应柱脚提离和柱脚铰接效果最好;摇摆墙墙体剪力图和弯矩图分别呈现“C形”和“反C形”,柱脚固接时墙体弯矩均为最小,与层数无关。柱脚固接耗能连梁两端采用固接最优,柱脚铰接和柱脚提离时耗能连梁两端采用铰接形式效果更优。此分析可为框架‑摇摆墙结构进一步推广应用提供参考。
After the rocking wall is introduced into frame structure
the column foot will still undergo a certain degree of plastic damage during earthquakes. Adjusting the column foot to be hinged or uplifted can potentially mitigate these defects. Using the three-story
six-story
and nine-story steel frames as the benchmark models
this study established three kinds of frame-rocking wall structure models with fixed
hinged and uplifted column feet
respectively
followed by dynamic elastoplastic time history analysis. The maximum lateral displacement
inter-story drift
peak acceleration
inter-story shear force
wall shear force
and bending moment of each structure were compared. The comparative model of fixed and hinged energy-dissipating coupling beams was further established to study the effects of coupling beam connection modes on the structure's seismic performance. The results showed that in the three-story model
fixed column foot achieved optimal control of lateral displacement
inter-story drift
acceleration
inter-story shear force and rocking wall shear force. In the six-story and nine-story models
the best performance was achieved with uplifted and hinged column feet
respectively. The shear force and bending moment diagrams of the rocking wall exhibited "C -shaped" and "reverse C-shaped" patterns
respectively
with the smallest wall bending moment observed when the column foot was fixed
regardless of the number of stories. For energy-dissipating coupling beam
fixed connections at both ends were optimal for fixed column foot
while hinged connections at both ends of the energy-dissipating coupling beam were better for hinged and uplifted column feet. This analysis provides a reference for further application and development of steel frame-rocking wall structures.
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