预应力杂交结构的屈曲分析

含有预应力索的半刚性大跨度空间结构是一种非常有生命力的杂交钢结构形式,对应用日益广泛的空间杂交结构的正确分析是保证结构安全设计的前提,屈曲分析通常是这类结构分析的主要内容之一,结构的屈曲分析可分为特征值屈曲分析和非线性屈曲分析。论文首先阐述了结构特征值屈曲分析和非线性屈曲分析中的分枝屈曲分析的基本理论,提出了含有恒定荷载的预应力结构特征值的求解方法,明确正确应用屈曲理论对保证工程安全设计的重要性,然后应用有限元软件ANSYS对待建的安徽大学体育馆新型弦支网壳屋盖结构进行了特征值屈曲分析和分枝屈曲分析,提出应用通用有限元程序跟踪结构分枝屈曲路径的方法,本文结论对预应力杂交结构的屈曲分析具有指导意义。

Buckling Analysis of Prestressed Hybrid Structure

Semirigid large span spatial structure which is composed of cable strut structure and steel structure is widely used and studied. The correct analysis of hybrid structure is the prerequisite of structural design. Buckling analysis usually is one of the most important part of structural analysis, and it can be sorted into eigenvalue buckling analysis and nonlinear buckling analysis. The basic theory of eigenvalue buckling analysis and bifurcation buckling analysis were presented and the method to obtain eigenvalue in the existence of constant load was provided. The importance of correctly applying the buckling theory was clarified. The roof of Anhui University Gymnasium is a new type of suspen-dome. Based on the buckling theory, it's buckling feature was analyzed by using ANSYS and the track of bifurcation buckling was presented. The conclusion is instructive to the analysis of structures with the same character.