斜拉空间桁架结构在静力作用下受力性能研究

Performance Study of a Cable-stayed Spatial Truss under Static Loads

利用有限元分析软件ANSYS计算了某斜拉空间桁架在静力作用下的内力及自由端位移,归纳了内力系数与节间位置、预应力、斜拉索高度之间的函数关系;详细分析了斜拉索施加的初始预应力和斜拉索高度对该结构内力及自由端位移的影响,提出了斜拉空间桁架的临界预应变概念,回归出了自由端位移与初始预应变以及斜拉索高度的函数关系。本文的研究成果能够为斜拉空间结构的受力性能研究和工程实践提供指导。

Internal force and displacement of the free end under the static state of a cable-stayed space truss was calculated by using the finite element analysis software ANSYS .The relations between the internal force coefficient and the inter-node position , height , prestressed cable were summarized .The influence of cable prestress and the cable height on the internal force and displacement at the free end of the structure was ana -lyzed in detail .The concept of critical pre strain in cable-stayed space truss was raised .The relations between the free end displacement , the initial pre strain , and the cable height were derived .