考虑两侧边约束作用钢板剪力墙剪压弹性屈曲分析

ELASTIC BUCKLING ANALYSIS OF STEEL PLATE SHEAR WALL WITH ELASTIC RESTRAINT OF TWO SIDES UNDER THE ACTION OF SHEAR AND COMPRESSION FORCE

目前钢板剪力墙抗剪设计中假定周边框架为钢板剪力墙提供简支约束,再通过乘以1.23的嵌固系数来考虑周边框架的约束作用,而不考虑周边框架刚度的影响。通过对剪力和单向压力组合作用下钢板剪力墙的弹性屈曲性能的有限元分析表明,两侧边构件扭转刚度与钢板剪力墙弯曲刚度的比值η可以准确地衡量两侧边构件(加劲肋)对钢板剪力墙的约束程度。在对400多个模型计算结果分析的基础上,拟合了剪压荷载作用下,考虑两侧边弹性约束作用的钢板剪力墙临界应力计算公式。

Surrounding members（ i. e. beams and columns）were assumed to supply simply supported edges for steel plate shear wall in the design of steel plate shear wall, and then the embedded coefficient of 1.23 was introduced to consider the restriction effect of surrounding members. The effect of rigidities of the surrounding members was not considered in the design process. A finite element analysis was carried out to investigate the elastic buckling of steel plate shear wall under shear and compression load. It was found that the factor 7/, that is ratio of rotational rigidity of the surrounding members and bending rigidity of the steel plate, was a good factor to measure precisely the elastic restraints of surrounding members to the shear wall. Based on computing data from more than 400 models, the equation of shear buckling coefficients was developed for steel plate shear wall with elastic restraint of two sides.