超限型钢混凝土框支剪力墙结构抗震性能评估
摘要
通过对普通与带粘滞阻尼器的型钢混凝土框支剪力墙结构进行动力时程分析与静力弹塑性分析,获得结构地震需求曲线和抗震能力曲线,开展抗震性能评估并检验是否达到预期的性能目标;此外,分析了塑性铰的分布与发展,揭示出型钢混凝土框支剪力墙结构的破坏机制.结果表明:粘滞阻尼器有效地降低了型钢混凝土框支剪力墙结构的地震响应,在不同强度地震作用下结构峰值位移和最大层间位移角最大减幅分别为35%和38%,带粘滞阻尼器型钢混凝土框支剪力墙结构的地震需求降幅介于14%～54%之间;型钢混凝土框支剪力墙结构最终形成以梁铰为主的破坏机制,结构破坏时大部分转换构件与剪力墙仍处于弱非线性状态,原结构设计达到"中震作用下框支层与避难层处转换构件与剪力墙仍处于弹性范围"的抗震性能目标.
The dynamic time history and push-over analyses of SRC(Steel-Reinforced Concrete) frame-supported shear wall structures with and without viscous dampers were carried out to obtain the seismic demand and capacity curves,and the seismic performances of the structures were evaluated and the expected performance objects were verified.Then,by analyzing the distribution and development of plastic hinges,the failure mechanism of the structures was investigated.The results show that viscous dampers effectively decrease the seismic responses of the structures,that the peak displacement and the maximum inter-story drift angle of the structures respectively decrease by 35% and 38% under earthquake actions with different intensities,that the seismic demand of the structure with viscous dampers decreases by 14% to 54%,that beam hinge failure is dominant in the structure fai-lure,and that most of transfer components and shear walls are still kept in weakly nonlinear state when the structure fails.Thus,the seismic performance object,namely transfer components and shear walls at the transfer and refuge stories are in elastic state under medium earthquake actions,is achieved.
The dynamic time history and push-over analyses of SRC(Steel-Reinforced Concrete) frame-supported shear wall structures with and without viscous dampers were carried out to obtain the seismic demand and capacity curves,and the seismic performances of the structures were evaluated and the expected performance objects were verified.Then,by analyzing the distribution and development of plastic hinges,the failure mechanism of the structures was investigated.The results show that viscous dampers effectively decrease the seismic responses of the structures,that the peak displacement and the maximum inter-story drift angle of the structures respectively decrease by 35% and 38% under earthquake actions with different intensities,that the seismic demand of the structure with viscous dampers decreases by 14% to 54%,that beam hinge failure is dominant in the structure fai-lure,and that most of transfer components and shear walls are still kept in weakly nonlinear state when the structure fails.Thus,the seismic performance object,namely transfer components and shear walls at the transfer and refuge stories are in elastic state under medium earthquake actions,is achieved.
引文
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[3]徐培福,王翠坤,肖从真.剪力墙竖向不连续结构的震害与抗震设计概念[J].建筑结构学报.2004,25(5):1-9.Xu Pei-fu,Wang Cui-kun,Xiao Cong-zhen.Earthquakedamages and design concepts of structures with verticaldiscontinuous shear walls[J].Journal of Building Struc-tures,2004,25(5):1-9.
[4]Moehle J P.Seismic response of vertically irregular struc-tures[J].Journal of Structural Engineering,1984,110(9):2002-2014.
[5]Valmundsson E V,Nau J M.Seismic response of buildingframes with vertical structural irregularities[J].Journalof Structural Engineering,1997,123(1):30-40.
[6]何铭基,吴轶,蔡健,等.基于IDA的带耗能腋撑转换框架地震易损性分析[J].华南理工大学学报:自然科学版,2011,39(12):144-151.He Ming-ji,Wu Yi,Cai Jian,et al.IDA-based seismic fra-gility analysis of transfer frame with energy dissipationhaunch braces[J].Journal of South China University ofTechnology:Natural Science Edition,2011,39(12):144-151.
[7]吴轶,何铭基,蔡健,等.带耗能腋撑型钢混凝土转换框架结构地震易损性分析[J].工程力学,2012,29(10):184-192.Wu Yi,He Ming-ji,Cai Jian,et al.Seismic fragility analy-sis of steel reinforced concrete transfer frame with energydissipation haunch brace[J].Engineering Mechanics,2012,29(10):184-192.
[8]吴轶,何铭基.消能减震技术在D8-C3项目的应用[R].广州:广州大学,2011.
[9]叶燎原,潘文.结构静力弹塑性分析(Push-over)的原理和计算实例[J].建筑结构学报,2000,21(1):37-43.Ye Liao-yuan,Pan Wen.The principle of nonlinear staticanalysis(Push-over)and numerical examples[J].Jour-nal of Building Structures,2000,21(1):37-43.
[10]朱杰江,吕西林,容柏生.复杂体型高层结构的推覆分析方法和应用[J].地震工程与工程振动,2003,23(2):26-36.Zhu Jie-jiang,LüXi-lin,Rong Bai-sheng.Push-overanalysis method and its application to RC tall buildingwith complex structural type[J].Earthquake Enginee-ring and Engineering Vibration,2003,23(2):26-36.
[11]Mander J B,Priestley M J N,Park R.Theoretical stress-strain model for confined concrete[J].Journal of Struc-tural Engineering,1988,114(8):1804-1826.
[12]门俊,陆新征,宋二祥,等.分层壳单元在剪力墙结构有限元计算中的应用[J].防护工程,2006,28(3):9-13.Men Jun,Lu Xin-zheng,Song Er-xiang,et al.Applicationof layered model in analysis of shear wall structures[J].Protective Engineering,2006,28(3):9-13.
[13]叶列平,陆新征,马千里,等.混凝土结构抗震非线性分析模型、方法及算例[J].工程力学,2006,23(S2):131-140.Ye Lie-ping,Lu Xin-zheng,Ma Qian-li,el at.Nonlinearanalytical models,methods and example for concretestructures subject to earthquake loading[J].Enginee-ring Mechanics,2006,23(S2):131-140.
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[15]韩小雷,陈学伟,熊爱国,等,盛德大厦改建工程抗震性能研究[J].建筑结构,2011,41(4):88-92.Han-Xiao lei,Chen Xue-wei,Xiong Ai-guo,el at.Seis-mic performance research of the reconstructing designproject of Shengde building[J].Building Structure,2011,41(4):88-92.
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