顶部无支撑壁板及其上部框架的等效框架计算法研究

Study on Equivalent Frame Calculation Method of Top Unsupported Panel and Its Upper Frame

本文以送水泵房为分析对象,采用分部计算法、等效框架法、有限元整体计算法对比分析,通过计算分析比较发现在外侧水土压力工况下,上部框架的约束使下部壁板外侧竖向弯矩明显减少,其减小幅度受壁板与框架柱的线刚度比值的控制,并据此得出等效框架计算法中等效宽度的取值方法,以及分部计算法的适用条件。

In this paper,the water supply pump house was taken as the analysis object,and the comparative analysis was made by using the partial calculation method,the equivalent frame method and the finite element overall calculation method.It was found that under the condition of external water and soil pressure,the outer vertical bending moment of the lower wall plate was significantly reduced by the upper frame constraint,and the reduction range was controlled by the linear stiffness ratio of the wall plate and the frame column.The value of the equivalent width in the equivalent frame calculation method and the applicable conditions of the partial cal-culation method were obtained.