摘要
本文基于文献[1]所建立的拉索式预应力钢桁架基本理论,通过引入组合单元和刚度变化因子,利用矩阵摄动原理建立了以结点竖向位移为约束,以确定弹性支承多次张拉预应力钢桁架各类单元刚度为目标的反演摄动迭代方程。算例表明,该方法具有较高的逼近精度,可满足工程设计需要。
Based on the fundamental theory of the cable-prestressed steel truss established in paper [1], the inversive iterative perturbation equations which can be used to determine the stiffeness of elements of the prestressed steel truss with elastic supports are put forward by using the principle of matrix perturbation and introducing the concepts of the combined elements and stiffeness factors. Some computational examples show that the method presented here has higher approaching accuracy, and can meet the need of engineering design.
出处
《上海力学》
CSCD
1999年第4期396-403,共8页
Chinese Quarterly Mechanics
基金
山东省自然科学基金
关键词
弹性支承
多次张拉
刚度反演
预应力钢桁架
摄动
elastic supports
repeatedly stretching
stiffeness inversive analysis
iterative perturbation.
