【摘要】 河南艺术中心大剧院是屋盖为81m×108m大跨度钢结构,下部由主台、后台、观众厅三个混凝土结构单元组成的复杂结构体系。采用仅考虑上部钢结构、上下结构共同工作的整体结构、改变上下结构连接的滑动支座约束刚度等不同结构计算模型,进行小震作用反应谱分析、大震作用动力弹塑性时程分析。结果表明,下部结构刚度以及支座约束刚度对屋盖钢结构自振周期、地震作用总水平剪力、水平位移、支座反力影响均超过10%;在罕遇地震作用下对结构塑性铰分布有明显的影响。屋盖钢结构抗震安全性能设计应考虑上下部共同工作影响。更多还原

【Abstract】 The theatre of Henan Provinical Art Centre is a complex structural system,including the long-span structural steel roof with the dimension of 81m×108m and the reinforced concrete bottom structures consisting of main stage,back stage,and exhibition hall.Both spectral response analysis of frequently occured earthquake action and elastic-plastic time-history analysis of seldomly occurred earthquake action are performed,considering the top structure only,the coincident top and bottom structure,and the structures by modifying sliding support connections between top and bottom structures.As a result,there are more than 10 percent impacting on natural frequency of the roof,total seismic horizontal shear force,horizontal displacement, and support reaction,as well as especially apparent impact on the distribution rule of structural plastic hinge under seldomly occurred earthquake action,due to the stiffness of bottom structure and its support restraint.And the coincident effect of top and bottom structures shall be considered in the design of structural steel roof’s earthquake-resistance behavior.更多还原