钢板剪力墙弹塑性分析

分析了钢板墙从弹性屈曲到拉力带全部屈服的受力全过程。在弹性屈曲阶段,引入了弹性嵌固系数以考虑框架约束的影响。在弹塑性阶段,考虑了拉力带倾角、塑性变形系数和屈服后阶段弹性模量折减等影响,用斜拉杆模型合理地模拟了拉力带的受力过程,推导了斜拉杆初始屈服应力、极限应力、钢板墙剪力和位移计算公式。分别计算了钢板和纯框架的单独作用,然后再考虑其组合作用,得到了钢板墙的弹塑性荷载-位移曲线,通过算例验证了公式的有效性。

Elasto-plastic Analysis of Steel Plate Shear Walls

A full shear resisting process of steel plate shear wall,which is developed from elastic buckling to the yielding of tension field formed in the panel,is investigated.At the elastic buckling stress stage,an amplified coefficient is introduced to evaluate the anchor effect of the surrounding frame.At the elastoplastic stress stage,the action of tension field is simulated reasonably by the strip model including the effects of the angle of tension field,plastic deformation factor and postinitial yielding behavior modulus etc.The formulas of initial yielding stress and ultimate stress of strip,the shear and displacement at different stress stages for panels are conducted.The action of the panel and steel frame is considered separately,and their interaction is taken into account.The load-displacement curve for steel plate shear walls at different stages is obtained.The effectiveness of the method is demonstrated by comparing the predicted response with results from test.