力法在索-桁结构静力分析中的应用  

Application of The Force Method in Cable-Truss Structures

作　　者：聂建国[1] 陈必磊[1] 肖建春[2] 

机构地区：[1]清华大学,北京100084 [2]贵州工业大学,贵阳550003

出　　处：《应用力学学报》2003年第3期111-117,共7页Chinese Journal of Applied Mechanics

基　　金：北京市科委资助项目 (H0 10 610 2 3 0 112 )

摘　　要：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Newton RaphsonMethod(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。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.

关 键 词：力法 索-桁结构 静力分析 悬索结构 计算方法 迭代法 

分 类 号：TU323.4[建筑科学—结构工程] TU311.1