大跨度大型复杂体型网架结构的风效应分析

Analysis of Wind-excited Behavior of Large Span Complicated Space Truss Structure

以世界上最大的网架结构——深圳市民中心屋顶网架结构为工程背景,详细探讨了此类结构的在风荷载作用下的风效应。对于这种自振频率密集型的结构用随机振动理论分析其在脉动风荷载下的动力响应时,不仅要考虑选择主导模态振型,而且不能忽略交叉项的影响。

Wind is the main design load of the large span complicated space truss structures. In this paper, the dynamics behavior of large span complicated space truss structures under wind-excited was discussed in detail with the roof of Shenzhen people center, the biggest space truss structure in the whole world, as the engineering background. The result demonstrated that both the main mode shapes and cross terms between the mode shapes were considered when the wind-excited behavior of structure was analyzed based on random vibration theory.