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首先采用反应谱法和时程分析两种方法对大跨度空间网壳结构进行了全面分析,了解该形式结构的工程抗震受力性能。然后对两种方法的分析结果进行了对比,考查了结构杆件内力的变化,进而得出了内力差异随结构跨度、矢跨比和周期等的变化关系,找出了采用球反应谱法分析得出的结构响应偏于危险的杆件,从而为网壳结构的抗震设计提出了改进建议。
Firstly, the method of response spectrum and time-history analysis are used to comprehensively analyze the structure of long-span space reticulated shells, and to understand the seismic performance of this form of structure engineering. Then, the results of the two methods are compared, and the change of internal force of the structural members is investigated. Then the relationship between the internal force and the span of the structure, the ratio of pitch to span and the cycle is obtained. The results show that the response of the structure is biased to the dangerous members, so some suggestions for improving the aseismic design of the reticulated shell structure are put forward.