【摘要】 介绍了江苏溧水体育场上部钢管桁架下部混凝土框架结构的设计理念和结构体系.采用有限元软件MI-DAS对钢结构独立模型和钢结构与混凝土结构整体模型进行了静力分析、模态分析和反应谱分析的比较.结果表明,该结构在两种模型中的杆件内力变化不大,节点位移变化较大,而结构的自振特性及在地震作用下的响应差异很大.当上部结构刚度较大,而下部结构刚度较小时,应进行上下部结构的整体分析,考虑结构的共同工作.更多还原

【Abstract】 Based on the steel-pipe truss superstructure and concrete frame substructure of Jiangsu Lishui Stadium,design concept and structural system were introduced.With FEM software MIDAS,the static analysis,modal analysis and response spectrum analysis for the individual model of steel structure and the whole model of steel-concrete structure were calculated and compared.Results show that the difference between two models is not evident in internal force of bars.While it is larger in displacement of joints,and evident in character of free vibration and the response of earthquake action.The whole structure analysis should be considered assuming that the stiffness of the upper part is larger than that of the lower parts.更多还原