结构参数对郑州国际会展中心屋盖结构的抗震性能影响分析

本文以郑州国际会展中心展厅钢屋盖的矩形单元为工程算例,借助ANSYS,采用振型分解反应谱法,计算结构在不同参数下的自振频率、动位移、支反力、动静内力比和动静位移比并对结果加以比较分析。研究表明预张力对于结构的动力性能影响甚微,可以忽略不计;但边界条件却改变了结构在多遇地震作用下的受力性能,建议慎重选取。为掌握该类斜拉式预张力索拱结构体系的动力性能提供设计依据。

Seismic analysis of structural parameters of Zhengzhou International Conference Exhibition Center

A rectangular unit of steel roof in Zhenghou International Conference Exhibition Center is introduced to research the effects of different structural parameters on dynamic performance with ANSYS software.Response spectrum method is applied to calculate natural vibration frequency,dynamic displacements,and support reactions,ratio of the maximum dynamic forces to static forces and ratio of the maximum dynamic displacement to static displacement,and so on.Moreover,the comparative analysis is made to summarize the rules.The results indicate that the influences of pre-tensions on dynamic properties may be ignored,but,the boundary condition can change the mechanical performance under seismic action,so that it should be careful to choose them.This paper proposes a design basis for assessing the dynamic performance of the stay pre-tension cable-arch structures.