自回复跷动减震结构地震反应分析
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摘要
自回复跷动减震技术是一种新型的隔震减震技术,它使结构发生跷动的同时,能够消除结构的残余变形或者使结构的残余变形维持在一个足够低的水平。本文对自回复跷动减震结构体系进行推覆-卸载和增量动力分析(IDA),提出自回复跷动减震结构抗震性能的快速评估方法;验证在大震作用下,自回复跷动减震结构具有显著减小结构位移响应、减小结构残余位移(即自回复)和耗能的减震性能;随着地震波强度的增大,自回复跷动减震结构具有显著的自回复性能。
Self-centering rocking aseismic technology is a new base isolation aseismic technology,which allows the structure rocking and isolates the energy input of ground motion,meanwhile the structure can undergo large lateral displacement with little or no residual drift by providing sufficient restoring force,and earthquake energy can also be dissipated by special energy-dissipating devices.Based on incremental dynamic analysis(IDA) and cyclic pushover analysis,fast evaluation method for seismic performance of self-centering rocking aseismic structures(SCRAS) was studied.The analytical results indicated that the SCRAS exhibited excellent performances in reducing the displacement response,eliminating the residual displacement,and dissipating energy.With higher seismic intensity,the self-centering performance is more superior.
Self-centering rocking aseismic technology is a new base isolation aseismic technology,which allows the structure rocking and isolates the energy input of ground motion,meanwhile the structure can undergo large lateral displacement with little or no residual drift by providing sufficient restoring force,and earthquake energy can also be dissipated by special energy-dissipating devices.Based on incremental dynamic analysis(IDA) and cyclic pushover analysis,fast evaluation method for seismic performance of self-centering rocking aseismic structures(SCRAS) was studied.The analytical results indicated that the SCRAS exhibited excellent performances in reducing the displacement response,eliminating the residual displacement,and dissipating energy.With higher seismic intensity,the self-centering performance is more superior.
引文
[1]Christopoulos C,Filiatrault A,Folz B.Seismic response ofself-centering hysteresis SDOF systems[J].EarthquakeEngineering and Structrual Dynamics,2002,31(5):1131-1150
[2]Li Peng.Seismic response evaluation of self-centeringstructural systems[D].San Francisco:Stanford University,2005
[3]Michael P,Michel B.Seismic retrofit of bridge steel trusspiers using a controlled rocking approach[J.]Journal ofBridge Engineering,2007,12(5):600-610
[4]刘猛.屈曲约束柱跷动减震技术的试验和理论研究[D.]上海:同济大学,2009
[5]Bertero V V.Strength and deformation capacities of buildingsunder extreme environments[M.]New Jersey:Prentice Hall,1977:211-215
[6]Vamvatsikos D,Cornell C A.Incremental dynamic analysis[J.]Earthquake Engineering and Structural Dynamics,2002,31(3):491-514
[2]Li Peng.Seismic response evaluation of self-centeringstructural systems[D].San Francisco:Stanford University,2005
[3]Michael P,Michel B.Seismic retrofit of bridge steel trusspiers using a controlled rocking approach[J.]Journal ofBridge Engineering,2007,12(5):600-610
[4]刘猛.屈曲约束柱跷动减震技术的试验和理论研究[D.]上海:同济大学,2009
[5]Bertero V V.Strength and deformation capacities of buildingsunder extreme environments[M.]New Jersey:Prentice Hall,1977:211-215
[6]Vamvatsikos D,Cornell C A.Incremental dynamic analysis[J.]Earthquake Engineering and Structural Dynamics,2002,31(3):491-514
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