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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。
At present, the shear strength design of steel plate shear walls assumes that the perimeter frame provides simply supported constraint for the shear wall of the steel plate, and then considers the constraint of the perimeter frame by multiplying by the embedment coefficient of 1.23, irrespective of the stiffness of the perimeter frame. The finite element analysis of the elastic buckling behavior of the steel plate shear wall under combined shear and uniaxial pressure shows that the ratio η between the torsional stiffness of the two side members and the bending stiffness of the steel plate shear wall can accurately measure the ratio between the two side members Stiffeners) on the steel shear wall restraint level. Based on the analysis of more than 400 models, the formula for calculating the critical stress of steel plate shear walls considering the elastic restraint on both sides is fit under the action of shear load.