基于容许位移的网壳结构稳定验算实用方法

PERMISSIBLE DISPLACEMENT-BASED PRACTICAL METHOD FOR VERIFICATION OF RETICULATED SHELL STRUCTURE STABILITY

针对网壳结构的稳定承载能力分析操作复杂且所需机时较多的不足,本文提出了一种容许位移验算方法。该方法以设计临界荷载所对应的位移值作为容许位移值,将承载能力验算转换为位移验算,然后以容许位移值来校核网壳结构的稳定设计。以K8型单层球面网壳为例,展现了该方法的具体实现过程。实例设计表明该方法操作简单,计算量小,可为网壳结构在方案设计阶段进行稳定验算提供了一种近似方法。

Considering complicated analysis on stable carrying capacity of reticulated shell structure and high machine time, this paper proposes a permissible displacement verification method, which takes displacement related to the design critical load as the permissible displacement and converts carrying capacity verification into displacement verification before using the permissible displacement value to verify the reticulated shell structure stability design. K8-type single-layer spherical reticulated shell is adopted as an example to introduce the practical implementation procedure of this method. Practical design proves the convenient operation and low calculation work of this method. This is an approximate method to verify reticulated shell structure stability in scheme design phase.