钢框架-钢板剪力墙结构弹塑性状态的层剪力分布研究  

DISTRIBUTION OF HORIZONTAL SEISMIC SHEAR BASED ON INELASTIC STATE OF STEEL PLATE SHEAR WALLS

作　　者：孙国华[1] 顾强[1] 何若全[1] 方有珍[1] 

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

出　　处：《工程力学》2013年第7期113-121,共9页Engineering Mechanics

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：为研究钢框架-钢板剪力墙结构(SPSW)在弹塑性状态下层剪力的分布,该文设计了4个具有理想屈服模式的SPSW结构。考虑了结构层数、近场地震的速度脉冲效应及远场地震加速度累积循环效应的影响,采用弹塑性时程分析方法获得了SPSW结构在两类地震作用下层剪力分布的平均值,提出了SPSW结构弹塑性状态的层剪力分布模式,并同已有的层剪力分布模式进行了对比。分析表明:地震波的近场速度脉冲效应及远场加速度循环效应对SPSW结构的层剪力影响较大,层剪力分布模式应考虑其影响。该文建议的层剪力分布模式在精度上优于其他层剪力分布模式,基于能量的抗震设计方法可采用该文建议的层剪力分布计算结构楼层的耗能。In order to investigate the horizontal storey shear distribution of a steel plate shear wall under an elastic-plastic state, a total of four SPSW structures with ideal yield mechanism were designed. The effects of story number, velocity pulse near-fault records and acceleration cumulative effect far-fault records were considered. The average story shears of SPSW structures under two kinds of earthquake records were obtained through a nonlinear time history method. The formula of elastic-plastic story shear of SPSW was proposed, and the existing horizontal shear distribution pattern was compared. Near-fault records with velocity pulse and far-fault records with acceleration cumulative effect had important effects on the story shear distribution of SPSW, and this effect factor should be taken into account. The story shear distribution proposed by this paper was more accurate than other story shear distribution patterns. The story hysteric energy of SPSW can be computed reasonably through this new proposed story shear distribution pattern in the energy based aseismic method.

关 键 词：钢板剪力墙 弹塑性 层剪力分布 近场地震 远场地震 

分 类 号：TU391[建筑科学—结构工程]