近断层地震作用下钢板剪力墙结构基于MECE谱的性态设计方法  

Performance-based seismic design of steel plate shear walls using MECE spectrum under near-fault earthquake

作　　者：孙国华[1] 顾强[1,2] 何若全[1] 杨文侠[2] 

机构地区：[1]苏州科技学院江苏省结构工程重点实验室,江苏苏州215011 [2]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《建筑结构学报》2012年第5期105-117,共13页Journal of Building Structures

基　　金：国家自然科学基金项目(50978175);江苏省高校自然科学基金项目(10KJB560004)

摘　　要：结构在近断层地震作用下的损伤通常与强速度脉冲所携带的瞬时输入能量相关,为反映这种近场地面运动特征,以10条坚硬场地的近场地震记录为输入,建立了适用于设计的最大有效滞回耗能(MECE)谱,提出了基于MECE谱确定钢板剪力墙结构屈服基底剪力的性态设计方法。该方法不仅反映近场地震速度脉冲的影响,而且还可区别不同结构体系滞回特性的影响。同时,结合已有研究成果完善了钢板剪力墙结构周边构件能力设计的简化公式。通过对1榀10层3跨钢板剪力墙结构的弹塑性时程分析,对建议方法进行了验证。结果表明:在多遇及罕遇地震作用下结构层间位移角满足我国现行建筑抗震设计规范的要求,结构出现理想的渐进式梁铰屈服机构,证明了基于MECE谱钢板剪力墙结构性态设计方法的合理性和可靠性。The damage of buildings under near-fault earthquakes was related to the instantaneous input energy. In order to reflect near-fault pulse effect, a total of 10 near-fault ground motion records of stiff soil site condition were selected to construct the maximum effect cyclic energy （MECE） spectrum appropriate for seismic design. The base shear of steel plate shear wall （SPSW） was determined based on the MECE spectrum. Velocity pulse effect and hysteretic behavior of different structural system were taken into account in this energy-based seismic design method of SPSW. The design formula of steel beam and column surrounding of SPSW were proposed based on previous research results. A ten-story, three-span SPSW was designed based on this new design method, and seismic behavior was evaluated by nonlinear time history method. The analytical results show that the maximum average drift of SPSW can satisfy the deformation requirement of Chinese seismic code under frequent and rare earthquake levels, and the SPSW structure exhibits the ideal progressively developeil plastic mechanism. The reliability and accuracy of this new design method are verified.

关 键 词：钢板剪力墙 MECE谱 弹塑性时程分析方法 性态设计 

分 类 号：TU973.13[建筑科学—结构工程] TU318