无锡会展中心钢结构屋盖稳定分析

Stability analysis of steel structure roof of Wuxi Exhibition Center

本文对无锡会展中心大跨度钢结构屋盖进行稳定性分析,分析内容包括单榀空腹桁架的线性屈曲分析、带初始缺陷的几何非线性屈曲分析和几何非线性弹塑性屈曲分析。分析结果表明:几何非线性和初始缺陷对空腹桁架的稳定性影响比较小,而材料非线性对稳定性的影响比较明显。依据分析结果,本工程采取相应的技术措施。对采取技术措施后的结构进行稳定分析,结果表明,采取技术措施后,结构满足安全的要求。

In this paper,the stability analysis of span steel roof of Wuxi Exhibition Center is presented,including linear buckling analysis,geometric nonlinear buckling analysis with initial imperfection and geometric nonlinear elasto-plastic bucking analysis of a vierendeel truss.The analysis results show that geometric nonlinearity and initial imperfection have little influence on stability of structure,while material nonlinearity have obvious influence on stability of structure.According to analysis result,corresponding technological measures are taken to improve stability of the vierendeel truss.Results show that after the adoption of the technological measures,the structure meets safe requirements.