力法在索-桁结构静力分析中的应用

索-梁(桁)结构是一种新型的空间杂交结构体系，它首先在中国获得工程应用和发展。通过下压平行布置在单层悬索上的实腹梁或桁架等横向加劲构件，强迫其产生向下位移后并固定其位置，以便在整个索与横向构件组成的体系之间建立起预应力，就形成具有足够刚度和形状稳定性的横向加劲单层索屋盖结构。本文根据力法原理，提出了一种新型迭代计算方法，采用Newtpm Raphson Method(N-R)方法计算索-桁结构体系的静力响应。算例计算结果表明：本文方法是可行的，计算精度满足工程需求。

Application of The Force Method in Cable-Truss Structures

The cable-truss structure is a new type of spatial hybrid structure which is put forward and used firstly in China. When transverse rib-stiffening components, such as beams and trusses, which are disposed parallel on single curvature suspended cable roorfs, are moved down and then fixed, the pre-stress between trusses and cables is formed. This pre-stress can greatly improve the shape stability and rigidity of cable-truss structures. Based on the force method, a new algorithm is presented and the Newton-Raphson Method (N-R) is applied to the calculation of the cable-truss structures. The method proposed here is precise compared to other methods and can be used in practical engineering.