采用连续分布地震作用函数在框架—抗震墙结构中的内力和侧移分析

Analysis of Displacement and Shear Force by Adopting the Function of Continually Distributed Earthquake Load in a Frame-shear Wall Structure

由于地震作用本身是通过惯性力等效地反映 ,因此本文对高层框架 剪力墙结构建立力学模型时考虑了结构的质量分布 ,将楼盖的集中质量和墙体质量采用δ函数表示 ,推导出连续分布地震荷载作用下的位移和剪力 ,并与倒三角地震荷载作用下结构的位移和剪力作了相应的比较。通过算例发现 ,地震荷载分布形式对结构的剪力和位移影响较大 ,且采用连续分布形式地震作用分析高层框架

In this paper, a mechanical model of the frame-shear wall structure is proposed. The distribution of structural mass is considered because earthquake effect is reflected by structural inertia, and both story mass and wall mass are formulated by theδfunction. The ratios of both displacement and shear force under the condition of continually distributed earthquake load to those under the condition of reverse triangle earthquake load are given. Based on the case, it is known that the distribution of earthquake load greatly influences the structural shear force and the displacement and it is better to adopt the model of continually distributed earthquake load in analyzing a frame-shear wall structure.