同时设置金属和粘滞阻尼器的钢框架结构减震效果研究
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摘要
利用有限元软件SAP2000对同时设置金属阻尼器和粘滞阻尼器的15层钢框架结构分别作了多遇地震和罕遇地震下的弹塑性时程分析。分析中,所有阻尼器均布置在横向框架的两个边跨,根据两种阻尼器组合方式的不同定义了不同的分析工况,且比较了各工况时的楼层最大位移、层间最大位移角、层间最大剪力系数等地震响应值,从而讨论了各自的减震效果。研究结果表明:同时使用金属阻尼器和粘滞阻尼器进行减震控制时,两者可以较好地协同工作,从而减小结构的地震响应值,而且通过合理地调整其相对位置与数量,可以将结构在地震作用下的各响应值控制在理想的范围内。与此同时,仅需在结构下部2/3左右楼层设置阻尼器就能够较好地控制结构各层的侧移,从而取得较好的经济效益。本文的研究结果可为结构抗震设计提供有益的参考。
The elastic-plastic time-history analysis is made on one 15 floor high steel frame structure with metallic dampers and viscous dampers at the same time under frequently occurred and rarely occurred earthquakes by finite element software SAP2000.All dampers are arranged in two side spans of horizontal layers of the frame during the whole discussion.Different working conditions are delimited in accordance with different combinations of the two dampers.Then,damping effects of different conditions are discussed by comparison with the earthquake response,including maximum displacement of each floor、maximum inner-story drift angles、maximum inner-story coefficient of shear and so on.The result indicates that: when metallic dampers and viscous dampers are used for vibration control,they can not only work together well and reduce the value of seismic response of structure,but also control the earthquake response in the ideal range through reasonable adjustments to their relative location and numbers.At the same time,the lateral displacement can be well controlled at all levels when dampers are set up in the lower 2 /3 floors of structure,thus better economic benefits are achieved.The conclusions from this paper can provide useful reference for seismic design of structure.
The elastic-plastic time-history analysis is made on one 15 floor high steel frame structure with metallic dampers and viscous dampers at the same time under frequently occurred and rarely occurred earthquakes by finite element software SAP2000.All dampers are arranged in two side spans of horizontal layers of the frame during the whole discussion.Different working conditions are delimited in accordance with different combinations of the two dampers.Then,damping effects of different conditions are discussed by comparison with the earthquake response,including maximum displacement of each floor、maximum inner-story drift angles、maximum inner-story coefficient of shear and so on.The result indicates that: when metallic dampers and viscous dampers are used for vibration control,they can not only work together well and reduce the value of seismic response of structure,but also control the earthquake response in the ideal range through reasonable adjustments to their relative location and numbers.At the same time,the lateral displacement can be well controlled at all levels when dampers are set up in the lower 2 /3 floors of structure,thus better economic benefits are achieved.The conclusions from this paper can provide useful reference for seismic design of structure.
引文
[1]中国工程院土木、水利与建筑学部.《汶川地震建筑震害分析与重建研讨会》建议书.汶川地震建筑震害调查与灾后重建分析报告[R].北京:中国建筑工业出版社,2008Department of Civil Engineering、Water Engineering andArchitecture of Chinese Academy of Engineering.Proposals for the damage analysis and reconstruction ofWenchuan earthquake.Analysis Report of the buildingdamage investigation and reconstruction of Wenchuanearthquake[R].Beijing:China Building IndustryPress,2008(in Chinese)
[2]李爱群.工程结构减震控制[M].北京:机械工业出版社,2007Li Ai-qun.Damping control of engineering structures[M].Beijing:Machinery Industry Press,2007(in Chinese)
[3]周云,邓雪松,等.中国(大陆)耗能减震技术理论研究、应用的回顾与前瞻[J].工程抗震与加固改造,2006,28(6):1～15Zhou Yun,Deng Xue-song,et al.State of the Art andProspect of Energy Dissipation Technology in ChinaMainland[J].Earthquake Resistant Engineering andRetrofitting,2006,28(6):1～15(in Chinese)
[4]北京金土木软件技术有限公司,中国建筑标准设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006Beijing Civil King Software Technology Co.,Ltd.,China Institute of building standard design and research.User guide of SAP2000 with Chinese[M].Beijing:Communications Press,2006(in Chinese)
[5]GB50011—2001,建筑抗震设计规范[S]GB50011—2001,Code for Seismic Design of Buildings[S](in Chinese)
[6]王肇民.建筑钢结构设计[M].上海:同济大学出版社,2001:139～156Wang Zhao-min.Building Steel Structure Design[M].Shanghai:Tongji University Press,2001:139～156(in Chinese)
[2]李爱群.工程结构减震控制[M].北京:机械工业出版社,2007Li Ai-qun.Damping control of engineering structures[M].Beijing:Machinery Industry Press,2007(in Chinese)
[3]周云,邓雪松,等.中国(大陆)耗能减震技术理论研究、应用的回顾与前瞻[J].工程抗震与加固改造,2006,28(6):1～15Zhou Yun,Deng Xue-song,et al.State of the Art andProspect of Energy Dissipation Technology in ChinaMainland[J].Earthquake Resistant Engineering andRetrofitting,2006,28(6):1～15(in Chinese)
[4]北京金土木软件技术有限公司,中国建筑标准设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006Beijing Civil King Software Technology Co.,Ltd.,China Institute of building standard design and research.User guide of SAP2000 with Chinese[M].Beijing:Communications Press,2006(in Chinese)
[5]GB50011—2001,建筑抗震设计规范[S]GB50011—2001,Code for Seismic Design of Buildings[S](in Chinese)
[6]王肇民.建筑钢结构设计[M].上海:同济大学出版社,2001:139～156Wang Zhao-min.Building Steel Structure Design[M].Shanghai:Tongji University Press,2001:139～156(in Chinese)
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