某国际会展中心地震多点激励时程分析  

Time-history analysis of seismic multi-support excitation in an international convention and exhibition center

作　　者：杨斌斌 赵勇 魏建峰 吴国勤 YANG Binbin;ZHAO Yong;WEI Jianfeng;WU Guoqin(CCDI(Shenzhen)Consulting Co.,Ltd.,Shenzhen 518000,Guangdong,China;Hongkong Huayi Design Consultants(Shenzhen)Limited,Shenzhen 518057,Guangdong,China)

机构地区：[1]悉地国际设计顾问(深圳)有限公司,广东深圳518000 [2]香港华艺设计顾问(深圳)有限公司,广东深圳518057

出　　处：《工程建设》2023年第12期27-33,49,共8页Engineering Construction

摘　　要：广东佛山潭洲国际会展中心底部支撑结构东西向长度约为292 m,南北向长度约为323.8 m(屋盖总长度约为380 m),南北向结构超长,属超限大跨空间结构。本文采用大质量法对其进行考虑行波效应的地震多点激励时程分析,并对多点激励与一致地震输入下结构的扭转效应、重要构件的内力情况进行对比分析。结果表明:多点激励作用下,地震输入方向与地震传播方向垂直时结构的扭转效应明显,地震输入方向与地震传播方向一致时结构的扭转效应不明显;不同部位的杆件,地震多点激励作用的影响程度不同,文中给出了考虑地震多点激励作用影响的调整系数,构件设计时,可将反应谱分析结果乘以多点激励调整系数,以此来考虑地震多点激励作用的影响;总体上,地震多点激励对本结构的影响不大。The total length of bottom support structure of Guangdong(Tanzhou) International Convention and Exhibition Center is about 292 m in the east-west direction,about 323.8 m in the north-south direction andits roof is about 380 m in length in the north-south direction.The structure is super-long in the north-south direction and belongs to the transfinite large-span spatial structure.In this paper,the large-mass method is used to conduct the time history analysis of the seismic multi-support excitation considering the traveling wave effect,and the torsion effect of the structure and the internal force of important components are compared and analyzed under the multi-support excitation and the uniform seismic input.The results show that the torsion effect of the structure is obvious when the earthquake input direction is perpendicular to the earthquake propagation direction under the action of multi-support excitation,but not obvious when the earthquake input direction is consistent with the earthquake propagation direction.The influence degree of seismic multi-support excitation is different on members at different parts.The adjustment coefficient is given considering the effect of seismic multi-support excitation in this paper.When designing members,the response spectrum analysis result can be multiplied by the adjustment coefficient to consider the effect of seismic multi-support excitation.On the whole,the seismic multi-support excitation has little effect on the structure.

关 键 词：会展中心 多点激励 大质量法 行波效应 地震传播方向 

分 类 号：TU393.3[建筑科学—结构工程]