预应力自平衡索桁架的承载性能研究  

Behavior of prestress self-balanced cable trusses

作　　者：郭彦林[1] 郭宇飞[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《空间结构》2008年第3期41-46,共6页Spatial Structures

摘　　要：预应力自平衡索桁架作为点支玻璃幕墙的支承体系有着广泛的应用,本文重点研究这一新型结构形式的组成特点、受力机理及设计方法.首先应用小挠度弹性理论,在一些合理简化假设的基础上,推导自平衡索桁架的初始刚度、松弛刚度及临界松弛荷载公式.然后基于Ansys的弹塑性大挠度数值分析,研究预应力自平衡索桁架的全过程力学性能,验证理论公式的正确性.最后,提出预应力自平衡索桁架的设计方法.As a new kind of supporting member,a prestress self-balanced cable truss has been widely applied in point-supported glass curtain walls.This paper gives a detailed introduction of its mechanical characteristics and design method.Based on the small-deflection elastic theory and some simplified assumptions, the initial stiffness,the slack stiffness and the critical slack load have been derived theoretically.By employing the elasto-plastic finite element analysis associated with large-deflection effects,the pr...

关 键 词：点支玻璃幕墙 自平衡索桁架 预拉力 初始刚度 松弛刚度 极限承载力 

分 类 号：TU394[建筑科学—结构工程]