考虑框架柱轴向变形的变刚度框剪结构简化分析模型

A Simplified Model of Frame-shear Wall Structures with Varying Stiffness Allowing for Axial Deformation of Columns

高层建筑框架剪力墙结构在水平荷载作用下产生的倾覆力矩由剪力墙和框架共同承担,由框架分担的倾覆力矩会引起框架柱的轴向变形。本文利用连续介质理论,将考虑框架柱轴向变形的等刚度框剪结构位移控制微分方程应用到变刚度框剪结构,提出了考虑框架柱轴向变形的变刚度框剪结构简化分析模型。与通用有限元模型计算结果相比,该方法计算精度比未考虑框架柱轴向变形的框剪结构简化分析模型明显提高,可用于高层建筑框架剪力墙结构的初步设计,也可用于定量和定性分析框架剪力墙结构的受力特性。

Overturning moment induced by horizon loads are resisted by shear wall and frame together in tall building structures, and the overturning moment resisted by frame leads to axial deformation of columns. Based on continuum theory, the deflection governed differential equation allowing for axial deformation of columns is applied to the frame shear-wall structures with varying stiffness, and a simplified model allowing for axial deformation of columns is proposed. In comparison with general finite element method, the model allowing for axial deformation of columns is more accurate than the same model ignoring axial deformation of columns. The simplified model should be applied especially to preliminary design, quantitative and qualitative study of tall building frame shear-wall structures.