一种确定预应力索网结构几何形状与索力的方法  

A METHOD FOR DETERMINATION OF SHAPE AND INTERNAL FORCES OF CABLE-NET STRUCTURES

作　　者：韩大建[1] 苏建华[1] 

机构地区：[1]华南理工大学土木工程系,广东广州510640

出　　处：《工程力学》2005年第3期107-111,共5页Engineering Mechanics

摘　　要：节点位移与索元内力的求解是索网结构静力计算中的两个基本问题,其特点是结构的形状与内力是耦合的。从索网结构的节点平衡方程出发,推导了索网节点位移与索元内力增量所必须满足的平衡方程与变形协调方程的增量形式,然后用迭代法求解上述非线性方程组,从而对预应力索网结构进行初始平衡态以及荷载态下的节点位移和索力计算。最后给出了两个算例,验证了方法的正确性。This paper focuses on the feature that shape and internal forces are coupled for a cable-net structure. Equilibrium equations of the free nodes of a cable-net are established. Incremental equilibrium and compatibility equations of the nodal displacements and the cable forces are derived. The nonlinear equations are solved by iteration method. Two examples are given. The proposed approach proves to be feasible for determination of the initial equilibrium state and the loading state of cable-net structures.

关 键 词：索网结构 非线性 增量形式 初始平衡态 荷载态 

分 类 号：TU35[建筑科学—结构工程]