基于弹塑性地震响应的轻型消能摇摆架-框架结构损伤性能分析  

Damage Performance Analysis of Energy-Dissipative Light Rocking Frame Structure on The Basis of Elasto-Plastic Seismic Response

作　　者：杜永峰[1,2] 祁磊[1] 包超[1] 张文丽[1] 

机构地区：[1]兰州理工大学防震减灾研究所,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《工程抗震与加固改造》2016年第1期98-104,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金资助项目(51178211)

摘　　要：轻型消能摇摆架-框架结构作为一种新的结构体系,要将其应用于工程实际中,还需要大量理论分析和试验研究的支持。本文以一栋5层钢筋混凝土框架结构为原型,利用Open Sees有限元软件建立钢筋混凝土(RC)框架结构、摇摆架-框架结构、轻型消能摇摆架-框架结构的模型。首先利用单条地震动对三种模型进行弹塑性动力时程分析,从而对其局部损伤进行研究;然后选用20条地震动对结构进行增量动力分析(IDA分析),利用概率统计分析方法对于三种模型的整体损伤情况进行统计和分析。依据损伤指数可以对结构局部和整体损伤分布情况做出较好的评判,分析结果表明:增设轻型摇摆架能够提高结构的抗震能力,改善结构损伤机制,添加自复位消能支撑更可以优化结构耗能机制,大幅降低结构整体损伤程度。Energy-dissipative light rocking frame structure is a new structure system,some of the correlated technologies are not mature.In order to promote and apply the new structure system to the actual project,more research should be done. Based on a 5-story RC frame structure,finite element models of RC frame structure,rocking frame structure and energy-dissipative light rocking frame structure model are established by Open Sees software. The models are investigated by time-history method and IDA method respectively,the local damage index and global damage situations of these models are got. Results show that light energy-dissipative rocking frame has better anti-seismic performance and seismic damage mechanism. By installing the self-centering energy dissipation braces,the energy dissipation mechanism can be improved,and the global damage of structure can be decreased significantly.

关 键 词：轻型消能摇摆架-框架结构 增量动力分析(IDA) 损伤指数 局部损伤 整体损伤 

分 类 号：TU375.4[建筑科学—结构工程] TU317