自复位钢木混合剪力墙结构直接基于位移的设计方法及易损性分析  

Direct Displacement-Based Design Method and Fragility Analysis for Self-centering Steel Timber Hybrid Shear Wall Structures

作　　者：吕兆华 陈飞[2] 李征[2] LYU Zhaohua;CHEN Fei;LI Zheng(Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China;College of Civill Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092 [2]同济大学土木工程学院,上海200092

出　　处：《建筑钢结构进展》2022年第5期1-7,共7页Progress in Steel Building Structures

基　　金：国家自然科学基金(51878476)。

摘　　要：提出一种适用于自复位钢木混合剪力墙结构的直接基于位移的设计方法,并设计了一栋6层自复位钢木混合剪力墙结构,通过非线性时程分析对设计方法的合理性进行了验证。进一步选取50条地震动记录进行结构的非线性时程分析,研究了结构在地震作用下的损伤状态。基于云图法的易损性分析,获得了6层自复位钢木混合剪力墙结构针对不同性能目标的易损性曲线,研究了自复位系数对结构易损性的影响。研究结果表明:直接基于位移的设计方法适用于自复位钢木混合剪力墙结构的分析,且可设置结构最大层间位移角和最大残余层间位移角为性能目标。结构在大震作用下具有良好的抗倒塌能力和自复位能力。This study proposes a direct displacement-based design(DDD)method for self-centering steel timber hybrid shear wall structures.Using this method,a six-story prototype structure is designed.The performance of the structure is evaluated through nonlinear dynamic time-history analysis,which in turn provides the rationality of the design method.In addition,nonlinear time-history analysis on the structure is conducted to assess the structural damaging status under different levels of 50 earthquake excitations.Regarding different performance targets,the fragility curves of the six-story structure are obtained with cloud method.The influence of the self-centering coefficient on structural fragility is studied.The results indicate that the DDD method is applicable in designing self-centering structures,and the designers can set two different performance targets,i.e.,the maximum inter-story drift and the maximum residual inter-story drift.The six-story self-centering steel timber hybrid shear wall structure has a good performance in resisting collapse and a good self-centering ability.

关 键 词：自复位钢木混合剪力墙 直接基于位移的设计 易损性分析 非线性时程分析 云图法 

分 类 号：TU398.7[建筑科学—结构工程]