摘要
近年来,抗震设防目标逐渐从保护生命安全转向震后快速修复,可替换耗能梁段半刚性连接偏心支撑钢框架体系在震后通过替换新耗能梁,能够快速恢复其使用功能,因而得到了广泛关注。为了研究震后修复的偏心支撑钢框架的抗震性能及论证震后替换耗能梁段方法的可行性,首先对1个1∶2缩尺偏心支撑钢框架进行低周往复加载试验,然后更换新的耗能梁,再次对其进行低周往复加载试验。试验结果表明:修复替换后的试件与原试件相比,其滞回性能、承载力、延性系数、抗侧刚度和耗能性能虽不及原试件,但仍保留一定的承载力和良好的耗能性能;通过对层间位移角和耗能梁转角的分析,表明修复后的模型的整体变形能力以及其耗能梁转动能力依旧很好;对框架的失效模式和关键部位应变的分析,验证了更换耗能梁修复方法的可行性。
In recent years,the goal of seismic fortification has gradually shifted from protecting life safety to quickly returning to normal after an earthquake.The semi-rigid connection eccentrically braced steel frame system with replaceable links can be quickly restored to use by replacing the new link after an earthquake.In order to study the seismic performance of the eccentrically braced steel frame repaired after earthquake and demonstrate the feasibility of replacing links after earthquake,a 1∶2 scaled eccentrically braced steel frame was first subjected to quasi-static load,then it was repaired with a new links after the earthquake,and perform quasi-static loading tests again.The test results showed that compared with the original specimen,the hysteresis performance,bearing capacity,ductility coefficient,lateral stiffness and energy dissipation performance of the repaired and specimen with replaceable link were not as good as the original specimen,but still retained a certain bearing capacity and generally good energy-dissipating capacity.Through the analysis of inter-storey displacement angle and the rotation angle of the link,it was shown that the overall deformation capacity of the repaired model and the rotation capacity of the link were still very good.The failure mode and strain of key parts of the frame were analyzed to verify the feasibility of replacing the link repair method.
作者
周鑫
王新武
余永强
李通
ZHOU Xin;WANG Xinwu;YU Yongqiang;LI Tong(School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Henan International Joint Laboratory of New Civil Engineering Structure,Luoyang Institute of Science and Technology,Luoyang 471023,China;School of Civil Engineering,Henan University of Science&Technology,Luoyang 471023,China)
出处
《工业建筑》
北大核心
2023年第2期122-128,共7页
Industrial Construction
基金
国家自然科学基金项目(51678284)
河南省科技创新杰出人才基金项目(184200510016)
中原科技创新领军人才(214200510002)
关键词
偏心支撑
可替换构件
抗震性能
拟静力试验
震后修复
eccentrically braced frame
replaceable member
seismic performance
quasi-static test
seismic retrofit
