可替换式偏心支撑钢框架抗震性能  

Seismic performance of replaceable eccentrically braced steel frame

作　　者：李通 王新武[2] 时强[2,3] 布欣[2] 孙海粟[2] LI Tong;WANG Xin-wu;SHI Qiang;BU xin;SUN Hai-su(School of Civil Engineering,Henan University of Science and Technology,Luoyang 471023,China;Henan International Joint Laboratory of New Civil Engineering Structure,Luoyang Institute of Science and Technology,Luoyang 471023,China;School of Science,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]河南科技大学土木工程学院,河南洛阳471023 [2]洛阳理工学院河南新型土木工程结构国际联合实验室,河南洛阳471023 [3]武汉理工大学理学院,湖北武汉430070

出　　处：《浙江大学学报（工学版）》2021年第9期1725-1733,共9页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51678284);中原科技创新领军人才项目(214200510002);河南省高校科技创新团队项目(21IRTSTHN010);河南省科技厅科技攻关项目(212102310969);河南省高等学校重点科研项目(21B560010);河南省高校青年骨干教师培养计划(2020GGJS244).

摘　　要：为了研究耗能梁段屈服类型、柱轴压和震后替换耗能梁段对可替换式偏心支撑钢框架抗震性能的影响,采用拟静力循环加载的方法对4个可替换式偏心支撑钢框架进行试验,并从滞回曲线、刚度退化、延性系数和构件应变等方面分析其抗震性能.结果表明,耗能梁段屈服类型对可替换式偏心支撑钢框架抗震性能影响较大,随着耗能梁段从剪切型过渡到弯曲型,结构的承载能力、延性和耗能能力均呈下降趋势;随着柱轴压的增加,试件的初始刚度和延性系数逐渐降低;震后替换耗能梁段的模型与原模型相比,仅耗能能力有所下降,其余性能变化不大,说明这种结构具有良好的可替换性.通过对应变分析发现,直至试验结束,耗能梁以外绝大部分区域仍处于弹性阶段,说明耗能梁段作为第一道抗震防线可以保护其他构件.In order to study the yield type of the link,the axial force of the column and the post-earthquake replacement link on seismic performance of replacement eccentrically braced steel frame,the pseudo-static cyclic loading tests of four replaceable eccentrically braced steel frames were carried out.The hysteretic curves,the stiffness degradation,the ductility coefficient and the strain of specimens were investigated to evaluate the seismic performance.Results show that the yield type of the link is one of the important factors affecting the seismic performance of the replaceable eccentrically braced steel frame,the bearing capacity,the ductility and the energy dissipation capacity of the specimens with shear type is higher than that of bending type.The initial stiffness and the ductility coefficient of the structure decrease with the increase of the axial force of the column.Compared with the original model,only the energy dissipation capacity of the model of replacing the link after the earthquake is decreased,while the other performance did not change much which indicates that the structure has good replaceability.Through the corresponding strain analysis,it is found that until the end of the test,most areas are still in the elastic status except the link,which indicates that the link as the first seismic defense line can protect other members.

关 键 词：偏心支撑钢框架 可替换 高强螺栓 拟静力试验 抗震性能 

分 类 号：TU391[建筑科学—结构工程]