任意厚度非加劲钢板剪力墙与防屈曲钢板剪力墙的通用拉杆模型

钢板剪力墙在墙板屈曲后仍具有一定的抗压能力，板厚越大，抗压能力越强，对结构整体性能的影响也越大，现有的简化模型尚不能很好地考虑该效应。为此，首先分析了计入压应力的钢板墙的受力状态，进而推导了考虑墙板抗压能力的钢板剪力墙的刚度、承载力和屈服位移的计算式，并据此提出了一种通用拉杆模型。该模型仅通过调整经典多拉杆模型中拉杆的截面积以及屈服强度便可有效考虑墙板抗压能力的影响，应用简便。分析表明，所提出的通用拉杆模型具有与壳单元模型相似的精度，广泛适用于各种几何条件下的非加劲钢板剪力墙以及防屈曲钢板剪力墙的弹塑性分析。此外，目前对钢板剪力墙薄厚程度的划分尚缺乏定量依据，文中根据墙板抗压作用大小的不同，将钢板剪力墙划分为薄、中厚、厚三类，并给出了统一的刚度、承载力和屈服位移计算式，可供工程设计参考。

Universal strip model for buckling-restrained steel plate shear walls and unstiffened steel plate shear walls with different plate thicknesses

The buckled steel plate shear walls (SPSWs) still have the capability of resisting compressive stresses. The thicker the plate, the greater the residual capability, and the greater influence on the structural behavior. Current simplified models for SPSWs cannot accurately capture this effect. The compressive stress was incorporated into the theoretical analysis to propose the expressions of elastic stiffness, shear stress and yielding displacement for SPSWs. A more general simplified analytical model, termed the universal strip model, was developed. The new model takes into account the compressive stress of the infill plate by adjusting the cross sectional area and yielding stress of the strips of the classic strip model, which is convenient to apply. It is demonstrated that the universal strip model has a high accuracy and is applicable to elasto-plastic analysis for both buckling-restrained SPSWs and unstiffened SPSWs under various geometrical conditions. In addition, due to the lack of quantitative basis, depending on the effect of the panel compressive resistance, a quantitative method was proposed to classify the SPSWs into three categories: thin, medium, and thick. The developed universally formulae of the elastic stiffness, shear stress and yielding displacement are applicable to the engineering design.