不同连接方式非对称双塔连体结构地震响应分析
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摘要
为了研究非对称双塔楼连体结构在地震作用下的响应特征,采用SAP2000分析软件对无连廊及连廊与主体结构之间采用阻尼连接、刚性连接3种结构模型分别进行了模态分析、反应谱分析及弹性和弹塑性时程分析.结果表明:增设连廊后结构的整体刚度和协调性明显提高;连廊与主体结构采用刚性连接更能提高整体结构的协调性,但连廊及与连廊相邻构件受力复杂;连廊与主体结构采用阻尼连接能够适当提高整体结构的协调性且连廊受力较小,这种连接方式更有利于提高严重不对称双塔楼连体结构的抗震性能.
In order to investigate the response characteristics of asymmetric twin-tower connected structures under earthquakes,the modal analysis,the response spectrum analysis,the elastic time-history analysis and the elastoplastic time-history analysis were conducted using the software SAP2000 on three models with different connection ways.The first model is the structure without a joint corridor between two towers.And the other two models are the structures with a rigid collection or a damping connection between the joint corridor and towers.Results show that the stiffness and coordination are improved obviously after adding the joint corridor.The rigid connection can improve coordination more effectively,but in this condition the joint corridor and neighbouring components have complex stress states.The damping connection can appropriately enhance coordination,and the joint corridor bears a smaller force.So this kind of connection can improve the seismic behaviors of the seriously asymmetric twin-tower connected structures more reasonably.
In order to investigate the response characteristics of asymmetric twin-tower connected structures under earthquakes,the modal analysis,the response spectrum analysis,the elastic time-history analysis and the elastoplastic time-history analysis were conducted using the software SAP2000 on three models with different connection ways.The first model is the structure without a joint corridor between two towers.And the other two models are the structures with a rigid collection or a damping connection between the joint corridor and towers.Results show that the stiffness and coordination are improved obviously after adding the joint corridor.The rigid connection can improve coordination more effectively,but in this condition the joint corridor and neighbouring components have complex stress states.The damping connection can appropriately enhance coordination,and the joint corridor bears a smaller force.So this kind of connection can improve the seismic behaviors of the seriously asymmetric twin-tower connected structures more reasonably.
引文
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[3]陈伟军,刘永添,苏艳桃.带连廊高层建筑连接方式设计研究[J].建筑结构学报,2008,29(S1):73-77.
[4]Xu Y L,He Q,Ko J M.Dynamic Response of Damper-connect-ed Adjacent Buildings Under Earthquake Exciation[J].Engi-neering Structures,1999,21(2):135-148.
[5]Kim J,Ryu J,Chung L.Seismic Performance of Structures Con-nected by Viscoelastic Dampers[J].Engineering Structures,2006,28(2):183-195.
[6]侯家健,李桢章,韩小雷,等.双塔连体超高层建筑结构连接方案比较[J].工程抗震与加固改造,2006,28(6):81-85.
[7]Lee D,Kim H,Ko H.Evaluation of Coupling-control Effect ofa Sky-bridge for Adjacent Tall Buildings[J].The StructuralDesign of Tall and Special Buildings,2012,21(5):311-328.
[8]李国胜.高层混凝土结构抗震设计要点、难点及实例[M].北京:中国建筑工业出版社,2009.
[9]张丁喜,李春锋.连体连接方式对高层连体结构地震响应的影响[J].建筑结构,2010,40(2):33-36.
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