通过有限元软件SAP2000对某体育馆的钢管桁架屋盖进行分析研究，着重对其自振特点进行分析，进而研究屋盖整体结构在地震作用下的抗震特性，结果表明：钢管桁架屋盖结构的自振特性比较复杂，高阶振型是抗震分析时需考虑因素之一，水平地震作用下屋盖结构反应不明显，结构具有较好的刚度。%This paper studies the steel tube truss roof of the stadium with finite element SALVO00, mainly analyzes its vibration characteristics, and furthermore discusses the seismic features of the total roof structure under the earthquake. Results show that ： the vibration characteristics of steel tube truss roof structure are rather complicated, higher vibration mode is critical factor needing considering in seismic analysis, roof structure reflection is not obvious under horizontal earthquake, and the structure has better rigidity.
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