贵阳奥体中心主体育场罩篷采用了预应力平面桁架斜交网格结构体系,最大悬挑49m。首先确定了抗震性能化设计目标,然后分别采用振型分解反应谱法、弹性动力时程分析方法和弹塑性动力时程分析方法对该工程进行抗震性能研究。针对单独钢筋混凝土看台模型、钢结构模型以及结构整体模型三种计算模型,对结构自振特性、构件应力比、结构位移、塑性铰分布与损坏程度等性能进行深入量化分析与设计。另外针对上下部整体计算模型分别按一致激励和多点激励进行动力时程反应计算。计算表明:采用单独罩篷钢结构模型进行抗震设计存在不安全因素,必须考虑上下部共同工作的整体模型;多点激励法计算基底总剪力小于一致激励法计算结果,采用一致激励法进行设计能保证结构安全性;在罕遇地震作用下,看台钢筋混凝土结构刚度的退化对上部钢结构抗震有利。通过上述系列分析研究,实现了抗震安全性能化设计目标。 Guiyang Olympic Sports Center main stadium canopy using prestressed plane truss oblique grid structure system, the maximum cantilevered 49m. First, the design goal of seismic performance was established, and then the seismic performance of the project was studied by using the modal decomposition response spectrum method, the elastic dynamic time history analysis method and the elasto-plastic dynamic time history analysis method. According to the three models of single reinforced concrete stands, steel structure model and overall structure model, the quantitative analysis and design of structure self-vibration characteristics, component stress ratio, structural displacement, plastic hinge distribution and damage degree are conducted. In addition, for the upper and lower part of the overall calculation model, respectively, according to consistent incentives and multi-point incentive dynamic time-history response calculation. The calculation results show that there are some unsafe factors in the seismic design of a single canopy steel structure model, and the overall model of joint work of the upper and lower parts must be taken into consideration. The multi-point excitation method calculates the total base shear force less than the uniform excitation method and adopts the uniform excitation method Which can ensure the structural safety. In the rare earthquake, the degradation of the rigidity of the reinforced concrete structure of the stands is beneficial to the seismic resistance of the upper steel structure. Through the series of analysis and research, to achieve the design of seismic safety performance goals.