空间框架共同作用分析的简化方法

Simplified Interactive Analysis of Rafted Space Frames

在实际工程中,有许多筏基空间框架结构纵向不是很长,纵横向框架的跨数几乎相当或相差不多,为分析这一类结构的共同作用,本文提供了一种简化方法。在此简化方法中,考虑了结构变形的协调条件对荷载进行重分配,因此简化方法所得结果与三维空间有限元共同作用分析结果十分接近。本简化方法同样也适用于纵向很长,横向框架特性相类似的筏基空间框架结构。

In this paper, a simplified method is presented for analysing the structures that are not very long and have no harmonic similarity in the longitudinal direction. In this method, the redistribution of the loads has been considered in terms of compatibility condition of structural deformation.The application of the method is demonstrated by an interactive analysis of several space frames built on raft foundations resting on inhomogeneous soil media. It is shown that the results obtained from this simplified method are comparable with those of three dimensional finite element analysis.