钢板剪力墙结构的剪切变形分析

Shear Deformation Analysis of Steel Plate Shear Walls

目的研究钢框架-钢板剪力墙结构(Steel Plate Shear Wall,SPSW)的剪切变形比及变化规律,为采用基于能量性态方法设计时,合理估计剪力墙板的滞回耗能提供参考.方法基于5个系列15个单跨SPSW子结构、4个多层多跨SPSW结构的推覆分析,研究了SPSW结构剪切变形比、变化规律、及相关设计参数的影响.结果弹性阶段SPSW结构的楼层剪切变形比相对较小,但随着结构塑性的发展,楼层剪切变形比呈显著的增大趋势.剪力墙板厚度、钢柱刚度、跨度、层数、水平加载方式对SPSW结构楼层剪切变形比的影响较大,剪力墙板钢材的强度等级、钢梁刚度对SPSW结构剪切变形比的影响较小.结论高层钢框架-钢板剪力墙结构采用基于能量的性态方法设计时,上部楼层滞回耗能的计算需考虑剪力墙板剪切变形所占比例的影响.

The shear deformation and changing rule of steel plate shear wall were studied to provide a reference for computing the hysteretic of infill walls, which could be designed through energy-based seismic design method. Based on pushover analysis of fifteen single-span SPSW structures and four multi-storey, multispan SPSW structures, the ratio of shear deformation, changing rule and related to design parameters were analyzed. The results show that the value of storey shear deformation ratio at the elastic stage is small, but with the increase of structural plastic deformation, the shear deformation ratio increases. In addition, the thickness of infill wall, steel column stiffness, span, storey number, and loading pattern have the important effect on the storey shear deformation. The steel strength of infill wall and steel beam stiffness have slightly effect on it. The seismic design of high-rise SPSW should be taken into account the effect of shear deformation. when energy-based seismic design methode was adopted.