杆件撤除对平面刚架影响的实用计算法

A SIMPLIFIED CALCULATION OF INTERNAL FORCE REDISTRIBUTION IN PLANE FRAME STRUCTURES DUE TO THE REMOVAL OF A MEMBER

基于矩阵位移法，提出了用于分析杆件撤除对平面刚架结构影响的简化计算方法．与以往不同，本法仅将杆件撤除视为在原结构上增加荷载工况，因此。无需重建总体刚度矩阵即可用于分析杆件撤除对结构的影响．本方法的计算速度比矩阵位移法快很多，其例表明。

Based on the matrix displacement method, a simplified method is presented in this paper. This method can be used to calculate the in ternal forcere distribution in plane frame structures due to the removal of a member. In this method,such removal is treated as applying four kinds of load cases to the original structures, and the internaJ force rediStribution can be calculated without modifying the global stiffiness matrix. The computation by this method is time-saving as compared with the traditional method. Numerical examples show that the results of the two methods are almost the same.