【摘要】 河南省体育场罩棚采用了变厚度双层扁网壳结构形式，长度２７０ｍ，最大悬挑５５ｍ。本文结合实际工程，采用有限元非线性分析理论对网壳结构的稳定性进行了全过程跟踪分析，分别讨论了网壳结构在有无初始安装偏差影响下的稳定性质。并对网壳结构进行动力分析，研究了结构的自振特性，然后进一步利用振型分解反应谱法，分析了竖向地震作用下，网壳结构的地震内力系数分布情况。更多还原

【Abstract】 The canopy of Henan Stadium is a double layer flat shell with varied thicknesses. It is about 270m long and has an overhanging length of 55m. The geometrically nonlinear stability analysis with or without considering the effect of geo-metric deviation of the shell has been studied in this paper by the nonlinear finite element method. And the dynamic characteristics have been studied by use of the vertical seismic response spectrum method. The distribution regularity of internal force coefficients of members in space frame under vertical earthquake has been analyzed and some useful conclusions have been drawn.更多还原