变截面剪力墙体系的空间分析

Space Analysis of the System of Shear Wall with Variable Cross Section Subjected to Horizontal Loads

本文对水平荷载作用下的变截面剪力墙体系进行了空间分析。先将楼层所受水平荷载分解为两部份:一是通过刚度中心的水平力,它使楼盖产生平移;一是围绕刚度中心的扭矩,它使楼盖产生转角。前者引起的剪力墙内力可由横向及纵向弯矩分配法算出。后者引起的内力则由剪力计算求得。剪力墙弯矩确定后,它的水平位移也可以很快算出。本文方法可用手算,费时也有限,可用于对电算的校核。更重要的是通过手算有助于对结构性能的了解。这种了解对建立概念设计是十分必要的。文末有算例,其结果与采用矩阵位移法在计算机上运算的结果符合甚佳。

The effect of horizontal loads on any story of shear wall system isdecomposed into a horizontal force passing through the stiffness center of shear walls and a torque about it. The story moment is then distributed to each of the shear walls in both horizontal and vertical directions, while the torque is taken by the shearing force of the walls. The numerical work involved is relatively simple and limited, and can be conducted on a hand calculator. An illustrative example shows satisfactory agreement with the results found by the matrix method of displacements carried out on a digital computer.