预应力双向网格单层网壳结构整体稳定性分析  

Stability Behavior of Prestressed Two-Way Single Layer Lattice Shells

作　　者：宋同[1] 吴明儿[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《建筑钢结构进展》2010年第1期45-49,共5页Progress in Steel Building Structures

摘　　要：预应力双向网格单层网壳结构是通过在双向网格单层网壳结构内置入预应力索单元而形成的杂交结构,它能显著提高单层网壳结构的整体稳定性能。本文设置了三种预应力索单元的配置模式,分析预应力索截面积和索内预应力值的大小对结构整体稳定性能的影响,并与对应单层网壳结构进行了比较,体现其稳定性能方面的的优越性。Prestressed two-way single layer lattice shell is a new kind of hybrid structure,consisting of prestressed cables and two-way single layer lattice shell.The critical load of single layer lattice shell can be increased effectively through introducing prestressed cables.In this paper,three ways of the layout of cable is given,the influences of the cross section area of cable and the value of the pre-stress on the critical load of the shell is numerically investigated.It is shown that the stability of the prestressed shell can be improved greatly by introducing cables into the two-way single layer lattice shell.

关 键 词：网壳结构 预应力结构 稳定性 极限承载力 

分 类 号：TU311.2[建筑科学—结构工程]