以某网架顸屋面改造工程为背景，利用MSTCAD空间结构分析设计软件建立该网架顶模型，并进行动力分析，分析认为换用新型轻钢结构屋面可以减轻恒荷载，从而使结构满足承栽力要求。%Taking the transformation project of a grid roof as the background, the essay sets up the grid roof model by using MSTCAD spatial structure analysis and design software, carries out dynamic analysis, and finds out that using new light steel roof structure can reduce constant load and can meet the bearing requirement.
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