(中南建筑设计院 武汉 430071)
【提要】 介绍了预应力索圆拱结构的稳定分析，从圆拱和预应力索的应变值出发，求出两者的应变能。假定拱轴长度不变，得到拱的位移函数，由驻值原理，可求得预应力索圆拱的欧拉临界荷载。算例分析表明，方法简便，概念清楚，可供结构设计参考。
【关键词】 预应力 圆拱结构 稳定分析
Stability Analysis of Prestressed Cable Circular Arch/Liu Kaiguo(Zhongnan Architecture Design Institute,Wuhan 430071,China)
Abstract:The stability analysis of prestressed cable circular arch is introduced.Based on the strain of the arch and prestressed cable,the strain energy can be gotten.According to the displacement function,the Eulerian critical load can be calculated.Numerical ex
ample is given.The proposed method is clear in conception and convenient in calculation for the arch structure,which can be used in design.
Keywords:prestressed cable; circular arch; stability analysis;design