钢筋混凝土框架结构外设隔震支座加固前后抗震性能模拟分析  

Simulation Analysis of Seismic Performance of Reinforced Concrete Frame Structures Before and After Reinforcement with External Seismic Isolation Bearings

作　　者：王科亮[1] 张娟[1] 郝骏 童晔[1] 王帅 WANG Keliang;ZHANG Juan;HAO Jun;TONG Ye;WANG Shuai(Jiangsu Surveying and Design Institute of Water Resources Co.,Ltd.,Yangzhou 225127,China;Jiangsu Water Conservancy Construction Engineering Co.,Ltd.,Yangzhou 225001,China)

机构地区：[1]江苏省水利勘测设计研究院有限公司,江苏扬州225127 [2]江苏省水利建设工程有限公司,江苏扬州225001

出　　处：《华南地震》2024年第4期168-176,共9页South China Journal of Seismology

摘　　要：采用隔震支座对钢筋混凝土框架结构进行加固处理,并研究加固前后抗震性能变化情况,旨在提高加固效果,提高建筑物的抗震性能。通过在原始钢筋混凝土框架试件中安装间歇式SMA支座,制作出加固试件,并通过设计地震输入参数,得到试件在不同地震波影响下的结构响应情况。并搭载加载装置,针对两组试件同时进行拟静力模拟试验,检测出钢筋的抗震强度。通过对比两组试件在不同地震波条件下层间位移角的变化情况,证明钢筋混凝土框架结构的最大层间位移出现在结构底部。相较于原始试件,隔震支座加固后的试件的结构响应性能分别提高了38.47%以及40.14%。并调取两组试件的水平荷载—位移滞回曲线,实验结果显示,相对于加固前,隔震支座可以提高42.8%的滞回环面积。隔震支座可以有效提高建筑框架结构的抗震性能,相对于原始试件,加固后的试件残余形变较低,可以充分发挥结构的承载能力。This paper used seismic isolation bearings to reinforce reinforced concrete frame structures and studied the changes in seismic performance before and after reinforcement,so as to improve the reinforcement effect and enhance the seismic performance of buildings.By installing intermittent SMA bearings in the original reinforced concrete frame specimens,reinforced specimens were made,and the structural response of the specimens under different seismic wave effects was obtained by designing seismic input parameters.A loading device was equipped,and quasi-static simulation tests were conducted simultaneously on two sets of specimens,so as to detect the seismic strength of the steel bars.By comparing the changes in displacement angles between the lower layers of two sets of specimens under different seismic wave conditions,it is proven that the maximum inter-layer displacement of reinforced concrete frame structures occurs at the bottom of the structure.Compared with that of the original specimens,the structural response performance of the specimens reinforced with seismic isolation bearings increases by 38.47%and 40.14%,respectively.The horizontal load displacement-hysteresis curves of two sets of specimens are taken,and the experimental results show that after reinforcement,the seismic isolation bearings can increase the hysteresis loop area by 42.8%.Seismic isolation bearings can effectively improve the seismic performance of building frame structures.Compared with that of the original specimens,the residual deformation of the reinforced specimens is lower,which can fully utilize the load-bearing capacity of the structure.

关 键 词：钢筋混凝土 隔震支座 加固方法 抗震性能 

分 类 号：TU528[建筑科学—建筑技术科学]