某摩擦摆隔震框架结构地震反应分析
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摘要
介绍摩擦摆隔震支座的基本原理,采用可考虑动轴力和双方向耦合的FP模型建立摩擦摆隔震框架结构,分别用ETABS、SAP2000和MIDAS三个软件对摩擦摆隔震框架结构及其对应的非隔震框架结构进行模态分析、反应谱分析以及动力时程分析。结果表明:安装摩擦摆隔震支座能有效地控制位移、加速度和基底剪力等地震反应,削减构件内力;相比于多遇地震,罕遇地震下支座耗能性能得到更充分的发挥、结构响应降幅明显,减震效果更为理想。
The basic principle of friction pendulum bearing(FPB) is introduced,FPB isolated frame structure models are built by adopting the FP model considering the dynamic axial force and biaxial effect,modal analysis,response spectrum analysis and time history analysis of FPB isolated and non-isolated frame structures are conducted in ETABS,SAP2000 and MIDAS.Results show that: installing FPB can effectively control the seismic response of structure,including displacement,acceleration,base shear,etc.,internal forces of structural members are reduced.The hysteretic energy dissipation behavior of FPB under rare earthquake is performed into fuller play than that under conventional earthquake,the decreasing amplitude of structural response is obvious,and the seismic reduction effect is more ideal.
The basic principle of friction pendulum bearing(FPB) is introduced,FPB isolated frame structure models are built by adopting the FP model considering the dynamic axial force and biaxial effect,modal analysis,response spectrum analysis and time history analysis of FPB isolated and non-isolated frame structures are conducted in ETABS,SAP2000 and MIDAS.Results show that: installing FPB can effectively control the seismic response of structure,including displacement,acceleration,base shear,etc.,internal forces of structural members are reduced.The hysteretic energy dissipation behavior of FPB under rare earthquake is performed into fuller play than that under conventional earthquake,the decreasing amplitude of structural response is obvious,and the seismic reduction effect is more ideal.
引文
[1]Zayas V,Low S,Mahin S.A simple pendulum techniquefor achieving seismic isolation[J].Earthquake Spectra,1990,6(2):317-333
[2]Mokha A,Constantinou M C,Reinhorn A M.Teflon bearingsin aseismic base isolation.Experimental studies andmathematical modeling[R].Buffalo:State University of NewYork,1988
[3]龚健,周云.摩擦摆隔震技术研究和应用的回顾与前瞻(I)——摩擦摆隔震支座的类型与性能[J].工程抗震与加固改造,2010,32(3):1-10
[4]周云,龚健.摩擦摆隔震技术研究和应用的回顾与前瞻(II)——摩擦摆隔震结构的性能分析及摩擦摆隔震技术的应用[J].工程抗震与加固改造,2010,32(4):1-19
[5]龚健,邓雪松,周云.摩擦摆隔震支座理论分析与数值模拟研究[J].防灾减灾工程学报,2011,31(1):56-62
[6]龚健.新型摩擦摆隔震支座及其隔震结构体系研究[D].广州:广州大学,2010
[7]巫炜.摩擦摆隔震结构分析[D].北京:北京交通大学,2007
[2]Mokha A,Constantinou M C,Reinhorn A M.Teflon bearingsin aseismic base isolation.Experimental studies andmathematical modeling[R].Buffalo:State University of NewYork,1988
[3]龚健,周云.摩擦摆隔震技术研究和应用的回顾与前瞻(I)——摩擦摆隔震支座的类型与性能[J].工程抗震与加固改造,2010,32(3):1-10
[4]周云,龚健.摩擦摆隔震技术研究和应用的回顾与前瞻(II)——摩擦摆隔震结构的性能分析及摩擦摆隔震技术的应用[J].工程抗震与加固改造,2010,32(4):1-19
[5]龚健,邓雪松,周云.摩擦摆隔震支座理论分析与数值模拟研究[J].防灾减灾工程学报,2011,31(1):56-62
[6]龚健.新型摩擦摆隔震支座及其隔震结构体系研究[D].广州:广州大学,2010
[7]巫炜.摩擦摆隔震结构分析[D].北京:北京交通大学,2007
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