框架结构抗震、隔震和减振控制的对比分析
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摘要
运用有限元分析软件MIDAS/GEN建立典型三维多层钢框架模型,对设置铅芯橡胶支座基础隔震结构和粘弹性阻尼器结构分别进行双向水平地震作用下非线性时程分析。与传统抗震方法比较,讨论隔震结构和黏弹性阻尼结构的减震效果。在力学性质方面,结构在隔震和设置黏弹性阻尼器时,其顶层加速度峰值、顶层位移、相对位移、基底剪力等均有较大幅度地降低,表现出良好的隔震和减震效果。在经济性方面,隔震结构和黏弹性阻尼结构能够通过减小构件截面,减轻结构重量,达到经济的目的。在抗震可靠度方面,基础隔震结构更能表现出优越性。
A typical three-dimensional multi-storey steel frame model is established by the finite element analysis software MIDAS/ GEN which is also used to analyze non-linear time history analysis of base-isolated building with lead laminated rubber bearings and structure with viscoelastic damper under horizontal seismic two-way.Comparing with traditional seismic methods,the base-isolated structure and the viscoelastic structure are discussed on damping effects.In mechanical properties,the peak value of the acceleration and the displacement at the top floor,the relative displacement and the base shear of the isolated structure and VED structure are both reduced remarkably and aseismic behaviors are excellent.In the economy,the isolation structure and the viscoelastic structure are able to reduce the weight of structural,to achieve economic objectives by reducing member's cross-section.In the seismic reliability,the base-isolated structure shows it's superiority.
A typical three-dimensional multi-storey steel frame model is established by the finite element analysis software MIDAS/ GEN which is also used to analyze non-linear time history analysis of base-isolated building with lead laminated rubber bearings and structure with viscoelastic damper under horizontal seismic two-way.Comparing with traditional seismic methods,the base-isolated structure and the viscoelastic structure are discussed on damping effects.In mechanical properties,the peak value of the acceleration and the displacement at the top floor,the relative displacement and the base shear of the isolated structure and VED structure are both reduced remarkably and aseismic behaviors are excellent.In the economy,the isolation structure and the viscoelastic structure are able to reduce the weight of structural,to achieve economic objectives by reducing member's cross-section.In the seismic reliability,the base-isolated structure shows it's superiority.
引文
【1】GB50011-2001建筑抗震设计规范[S].
【2】付德宗,何广杰,周灵源.橡胶支座隔震结构弹塑性时程分析[J].工程结构,2005,25(5):62-66.
【3】徐赵东,马乐为.结构动力学[M].北京:科学出版社,2007.
【4】杨荣,王肇民.黏弹性阻尼器控制高层建筑地震响应的研究[J].同济大学学报,1998,26(6):613-616.
【5】薛素铎,赵均,高向宇.建筑抗震设计[M].北京:科学出版社,2003:92-94.
【6】田洁,张俊发,刘云贺,等.铅芯橡胶支座基础隔震体系参数优化配置研究[J].世界地震工程,2003,19(1):158-163.
【6】杨树标,杨艳秋,高天宝,等.框架复合隔震结构地震响应分析[J].河北建筑科技学院学报,2006,23(1):23-26.
【2】付德宗,何广杰,周灵源.橡胶支座隔震结构弹塑性时程分析[J].工程结构,2005,25(5):62-66.
【3】徐赵东,马乐为.结构动力学[M].北京:科学出版社,2007.
【4】杨荣,王肇民.黏弹性阻尼器控制高层建筑地震响应的研究[J].同济大学学报,1998,26(6):613-616.
【5】薛素铎,赵均,高向宇.建筑抗震设计[M].北京:科学出版社,2003:92-94.
【6】田洁,张俊发,刘云贺,等.铅芯橡胶支座基础隔震体系参数优化配置研究[J].世界地震工程,2003,19(1):158-163.
【6】杨树标,杨艳秋,高天宝,等.框架复合隔震结构地震响应分析[J].河北建筑科技学院学报,2006,23(1):23-26.
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