屋盖网架结构设计对比分析

Design and Comparative Analysis of Grid Structure Roof

用结构设计软件对一个上部网架、下部混凝土结构的体育馆进行了设计分析,采用整体建模计算和局部建模计算的方式进行了结构对比分析。通过对4种模型的周期、位移、挠度对比分析得出:建立整体结构模型进行结构计算是更符合实际情况,而对网架屋盖的设计,在合理考虑下部结构刚度后,可以按单独模型进行计算;铰接支座网架计算可能偏于不合理、不安全。说明了上部网架及下部结构整体计算需要注意的问题,为设计提供参考。

In combination of an overall model and a local model calculation,a gymnasium with Grid and Supported Reinforced Concrete Structure was analyzed and designed. Based on the comparative analysis of cycle,displacement and deflectionof four models,it is more fit in application to establish an overall model for the structural calculation,and in the design of steel structure grid roof,in consideration of the substructure stiffness,it is feasible to establish a model individually; the calculation of the articulated support grid may be unreasonable and unsafe. They are explained the problems to be paid attention to the overall calculation of the grid and the lower structure,and provide reference for the design.