层间隔震体系的理论研究
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摘要
通过建立层间隔震体系的两质点简化分析模型与多质点动力时程分析模型,提出层间隔震体系隔震层参数优化设计的方法,系统地研究了层间隔震体系当隔震层位置变化时其相应的减震工作机理,结果表明随着隔震层位置下移,层间隔震体系减震机理由TMD调谐逐步过渡为隔震耗能,在结构动力特性上体现为前两阶模态质量参与系数的比例发生变化。最后通过某10层框架结构的仿真分析,验证了层间隔震体系在控制地震下反应的有效性,并发现隔震层位置越低减震效果越明显,隔震层的阻尼能够有效地抑制隔震层下部子结构的反应。
A story isolation system is modeled by a simple theoretical two degree of freedom model and a multi-degree of freedom model of dynamic response analysis,respectively.A procedure is proposed for optimal design of isolator parameters of a story isolation system.The control mechanism of the story isolation system is systematically investigated for various isolation levels.The results demonstrate that the working mechanism of the story isolation system changes from frequency modulation to energy dissipation when the isolation level is from the roof to the bottom of the structure,while the ratios of the first two modal mass participation factors are quite different.A 10-story frame structure is employed in a numerical example to investigate the effectiveness of the story isolation on seismic response reduction,and the results indicate that the story isolation system with lower isolation level may achieve a higher level of response reduction and the seismic response of the substructure below the isolation level may be well attenuated by increasing the damping of the isolation level.
A story isolation system is modeled by a simple theoretical two degree of freedom model and a multi-degree of freedom model of dynamic response analysis,respectively.A procedure is proposed for optimal design of isolator parameters of a story isolation system.The control mechanism of the story isolation system is systematically investigated for various isolation levels.The results demonstrate that the working mechanism of the story isolation system changes from frequency modulation to energy dissipation when the isolation level is from the roof to the bottom of the structure,while the ratios of the first two modal mass participation factors are quite different.A 10-story frame structure is employed in a numerical example to investigate the effectiveness of the story isolation on seismic response reduction,and the results indicate that the story isolation system with lower isolation level may achieve a higher level of response reduction and the seismic response of the substructure below the isolation level may be well attenuated by increasing the damping of the isolation level.
引文
[1]Zhou Fulin.Progress of application and development inbase isolation and passive energy dissipation for civil andindustrial structure in P.R.China[C]//Proceedings ofthe International Post-SMiRTConference Seminar.Cheju,Korea,1999:30-40
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[5]徐忠根,胡敏茵,周福霖.房屋建筑中间层隔震研究[J].工程抗震与加固改造,2004(5):23-28(XuZhonggen,Hu Minyin,Zhou Fulin.Discussion on mid-story isolation of building[J].Earthquake ResistantEngineering and Retrofitting,2004(5):23-28(inChinese))
[6]谢军龙,周福霖.多层房屋结构TMD“加层减震”试验研究和应用[J].世界地震工程,1998,14(4):57-60(Xie Junlong,Zhou Fulin.Test investigation of seismicreduction using additional stories as a TMD and itsapplication to exsisting multistory buildings[J].WorldInformation On Earthquake Engineering,1998,14(4):57-60(in Chinese))
[7]和田章.免震构法の适用にぉける新しぃ动き[C].免震构造の研究と设计,1996:123-128
[8]祁皑.层间隔震技术评述[J].地震工程与工程振动,2004,24(6):114-120(Qi Ai.State-of-the-art of storyisolation system[J].Earthquake Engineering andEngineering Vibration,2004,24(6):114-120(inChinese))
[9]李向真,欧海龙,林舒.层间隔震结构计算模型的简化分析[J].地震工程与工程振动,2002,22(1):121-125(Li Xiangzhen,Ou Hailong,Lin Shu.Simplified analysison calculation model of interlayer seismic isolation[J].Earthquake Engineering and Engineering Vibration,2002,22(1):121-125(in Chinese))
[10]丁文镜.减振理论[M].北京:清华大学出版社,1988
[11]R克拉夫,J彭津.结构动力学(第二版)[M].王光远,译.北京:高等教育出版社,2006
[2]Fujita T,Fujita S,Tazaki S,et al.Research,developmentand implementation of rubber bearings for seismic isolation[J].JSME International Journal,1990,33(3):394-403
[3]Sladek J R,Klingner R E.Effect of tuned-mass damperson seismic response[J].Journal Structural Engineering,1983,109(8):2004-2009
[4]村上勝英,北村春幸,小崎均等.中間階に免震層を持つ建物の設計[R].日本,日本建築学会技術報告集(7),1999
[5]徐忠根,胡敏茵,周福霖.房屋建筑中间层隔震研究[J].工程抗震与加固改造,2004(5):23-28(XuZhonggen,Hu Minyin,Zhou Fulin.Discussion on mid-story isolation of building[J].Earthquake ResistantEngineering and Retrofitting,2004(5):23-28(inChinese))
[6]谢军龙,周福霖.多层房屋结构TMD“加层减震”试验研究和应用[J].世界地震工程,1998,14(4):57-60(Xie Junlong,Zhou Fulin.Test investigation of seismicreduction using additional stories as a TMD and itsapplication to exsisting multistory buildings[J].WorldInformation On Earthquake Engineering,1998,14(4):57-60(in Chinese))
[7]和田章.免震构法の适用にぉける新しぃ动き[C].免震构造の研究と设计,1996:123-128
[8]祁皑.层间隔震技术评述[J].地震工程与工程振动,2004,24(6):114-120(Qi Ai.State-of-the-art of storyisolation system[J].Earthquake Engineering andEngineering Vibration,2004,24(6):114-120(inChinese))
[9]李向真,欧海龙,林舒.层间隔震结构计算模型的简化分析[J].地震工程与工程振动,2002,22(1):121-125(Li Xiangzhen,Ou Hailong,Lin Shu.Simplified analysison calculation model of interlayer seismic isolation[J].Earthquake Engineering and Engineering Vibration,2002,22(1):121-125(in Chinese))
[10]丁文镜.减振理论[M].北京:清华大学出版社,1988
[11]R克拉夫,J彭津.结构动力学(第二版)[M].王光远,译.北京:高等教育出版社,2006
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