带黏弹性阻尼器可更换连梁的剪力墙结构抗震性能分析  

Seismic Performance Analysis of Shear Wall Structures with Viscoelastic Dampers as Replaceable Coupling Beams

作　　者：汪盟 吴浩[1] 刘晓芳 WANG Meng;WU Hao;LIU Xiaofang(State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2022年第5期51-58,共8页Structural Engineers

基　　金：国家自然科学基金资助项目(51938013,51908429);上海市自然科学基金项目(22ZR1465400)。

摘　　要：地震作用后,传统剪力墙结构在连梁和墙角等位置常常发生难以修复的损伤,造成经济损失。针对这一问题,对一种在连梁中设置黏弹性阻尼器的可更换连梁剪力墙结构的抗震性能进行研究。以一个10层联肢剪力墙体为例,通过有限元软件OpenSees分别建立传统方案模型和可更换连梁方案模型,并对二者进行四水准下的弹塑性时程分析,对比分析层间位移角、楼层剪力、墙脚塑性转角和连梁塑性转角等抗震性能指标。结果表明,相较于传统剪力墙结构,在连梁中设置黏弹性阻尼器可以减小剪力墙结构的地震响应,降低塑性损伤,提高抗震性能。After earthquakes,it is found that the coupling beams and the bottom corners of traditional shear wall structures easily suffer damage which is very difficult to be repaired,thus causing economic lost. To solve this problem,a type of shear wall structure with viscoelastic dampers as replaceable coupling beams was investigated. A case study of a 10-story coupled shear wall was carried out. Finite element software OpenSees was utilized to build a traditional structure and a structure with replaceable beams,and conduct elastoplastic time history analysis of both structures under four-level seismic fortifications. Then the seismic performance indexes such as inter-story drift ratio,story shear force,plastic damage of the coupling beams and the bottom corners of shear walls were compared and analyzed. The results show that compared with the traditional shear wall structures,the seismic performance of shear wall structures with viscoelastic dampers as replaceable coupling beams is improved because of smaller seismic response and less damage to the main structure.

关 键 词：黏弹性阻尼器 可更换连梁 OPENSEES 弹塑性时程分析 

分 类 号：TU352.11[建筑科学—结构工程]