基于耗能减震结构耗能装置的优化设置的研究
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摘要
在建筑物中设置耗能减震装置,已在抗震领域研究多年,而阻尼安装位置的优化确是摩擦阻尼器应用中面临的主要问题之一.相同数量的阻尼器,不同的布置位置,将会对主体结构的消能减震作用产生较大影响.对此,本文以某八层框架为例,通过ANSYS有限元软件对结构进行八度多遇及罕遇地震作用分析,得出了结构在无阻尼、循环优化法及遗传算法再优化三种情况下结构的地震响应.计算结果表明,安装摩擦阻尼器的消能减震结构抗震性能明显提高;在摩擦阻尼器数量一定的前提下,通过遗传算法对阻尼器位置布设的进一步优化有利于减小结构地震响应,提高结构抗震性能.
Setting energy dissipator in the building has been in research for many years in the seismic field.One of the friction damper application problems is the damper setting place.There is great influence on energy dissipation in structure whether the damper setting place is optimized under the same number of the dampers.Eight degrees multi-in earthquake and rare earthquake dynamic time history analysis was done in an eight-floor frame by ANSYS finite element software.Three conditions of structural dynamic response are obtained:no friction damper,friction damper optimized by cycled optimum method,and friction under GA method.The results show that the structure,with friction damper installed,can markedly improve the seismic ability,and the optimization of friction damper installation place will be greatly helpful for reducing the structural dynamic response as the number of friction damper is determined.
Setting energy dissipator in the building has been in research for many years in the seismic field.One of the friction damper application problems is the damper setting place.There is great influence on energy dissipation in structure whether the damper setting place is optimized under the same number of the dampers.Eight degrees multi-in earthquake and rare earthquake dynamic time history analysis was done in an eight-floor frame by ANSYS finite element software.Three conditions of structural dynamic response are obtained:no friction damper,friction damper optimized by cycled optimum method,and friction under GA method.The results show that the structure,with friction damper installed,can markedly improve the seismic ability,and the optimization of friction damper installation place will be greatly helpful for reducing the structural dynamic response as the number of friction damper is determined.
引文
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[2]周福霖.工程结构减震控制[M].北京:地震出版社,1997.ZHOU Fu-lin.Damping control of engineering structures[M].Beijing:Earthquake Press,1997.
[3]PALL A S,VERGANELAKIS V,MARSH C.Friction-Dampers for Seismic Control of Concordia University Li-brary Building[C].Proc.of 5th Canadian Conference on Earthquake Engineering,Ottawa,1987.
[4]SAHAI R.Performance Based Design of 4-story Moscone Convention Center Expansion Using Steel Couple GirderMoment Resisting Frame and Friction Dampers[C]∥Proceedings,SEAOC Anuual Convention,Santa Barbara,California,2000.
[5]欧进萍,邹向阳.振戎中学食堂楼耗能减震分析与设计(I)—反应谱法[J].地震工程与工程振动,2001,21(1),109-114.OUJin-ping,ZOU Xiang-yang.Seismic analysis and design of energy of Zhenrong high school’Dining-room(I)—Response spectrum method[J].Earthquake Engineering and Engineering Vibration,2001,21(1),109-114.
[6]NIELSEN L O,MUALLAI H,I WAI Y.Seismic Isolation with a New Friction-Viscoelastic Damping System[C]∥Proceedings,13th World Conference on Earthquake Engineering,Vancouver,2004.
[7]周建中,赵鸿铁,薛建阳.黏弹性阻尼结构的递归神经网络优化[J].西安建筑科技大学学报:自然科学版,2005,37(1):35-39.ZHOUJian-zhong,ZHAO Hong-tie,XUE Jian-yang.Opti mum of the viscoelastic structure based on recurrentneural network[J].J.Xi′an Univ.of Arch.&Tech.:Natural Science Edition,2005,37(1):35-39.
[8]冯瑛.网架结构优化设计分析[D].西安:西安建筑科技大学,2008.FENG Ying.Opti mization Design and Analysis of network structure[D].Xi′an:Xi′an University of Architectureand Technology,2008.
[9]雷英杰,张善文.Matlab遗传算法工具箱及应用[M].西安:西安电子科技大学出版社,2005.LEI Ying-jie,ZHANG Shan-wen.Matlab Genetic Algorithm Toolbox and Its Application[M].Xi′an:Xi′an Elec-tronic Science and Technology University Press,2005.
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