滑移隔震结构基于能量分析的简化计算方法研究
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摘要
采用能量法对多自由度剪切型结构隔震体系进行非线性地震反应分析时,其计算量大、分析复杂,难以用于工程实际.针对上述问题,将对其多自由度振动方程进行求解分析,找到一种等代体系来简化隔震体系的求解过程,并简要分析了近断层地震动三要素对滑移隔振结构总输入能的影响.最后,对一五层框架隔震结构模型分别采用能量分析法和简化后的能量法进行计算,将其结果进行对比,说明了本文提出的计算方法是偏于安全的,为工程的抗震设计提供参考.
A large amount of calculation and complex analysis is involved in the nonlinear seismic response analysis of the multi-DOF shear structure isolation system with the energy method,not ready for use in engineering practice.In order to solve these problems,this paper,through its analysis of free vibration equation,finds an equivalent system to simplify the solution of the isolation system.And the influence of three elements of near-fault ground motion on the total input energy was simply analyzed.Finally,a five-storey framework isolation structure model under the action of earthquake is respectively analyzed by energy method and the simplified calculation method Compared with the results,it shows the method proposed is rather safe,which also provides the reference for the seismic design of the project.
A large amount of calculation and complex analysis is involved in the nonlinear seismic response analysis of the multi-DOF shear structure isolation system with the energy method,not ready for use in engineering practice.In order to solve these problems,this paper,through its analysis of free vibration equation,finds an equivalent system to simplify the solution of the isolation system.And the influence of three elements of near-fault ground motion on the total input energy was simply analyzed.Finally,a five-storey framework isolation structure model under the action of earthquake is respectively analyzed by energy method and the simplified calculation method Compared with the results,it shows the method proposed is rather safe,which also provides the reference for the seismic design of the project.
引文
[1]党育,杜永峰,李慧.基础隔震结构设计及施工指南[M].北京:中国水利水电出版社,2007.DANG Yu,DU Yong-feng,LI Hui.The design and construction guidelines of Base-isolation structure[M].Beijing:Chinese Water Conservancy and Hydropower Press,2006.
[2]姚谦峰,梅占馨,吴敏哲.滑移隔震结构振动分析[J].西安建筑科技大学学报:自然科学版,1999,31(3),208-210.YAO Qian-feng,MEI Zhan-xin,WU Min-zhe.Vibration analysis of structure base isolated by sliding[J].Xi′an Univ.of Arch.&Tech:Natural Science Edition,1999,31(3):208-210.
[3]毛利军,李爱群.多层滑移隔震建筑结构的简化模型及分析精度[J].建筑结构学报.2005,26(2):117-123.MAO Li-jun,LI Ai-qun.The simplified models and their precision for analysis of multi-story sliding isolated structures[J].Journal of building structures,2005,26(2):117-123.
[4]姚谦峰,夏禾.基础滑移隔震结构振动特性分析[J].世界地震工程,2001,17(1):50-55.YAO Qian-feng,XIA He.Analysis of vibration properties of structures with sliding base isolation[J].World information on earthquake engineering,2001,17(1):50-55.
[5]NICOS Makris,CHANG Shih-Po.Effect of viscous,viscoplastic and fricti-on damping on the response of seismic isolated structures[J].Earthquake Engineering and Structural Dynamics,2000,29:85-107.
[6]李新乐,朱唏.考虑场地和震源机制的近断层地震动衰减特性的研究[J].工程地质学报.2004,12(2):141-147.LI Xin-le,ZHU Xi.Attenuation of near-fault ground motions based on site and focal the study mechanism[J].Journal of engineering geology,2004,12(2):141-147.
[7]BRAY J D,RODRIGUEZ Marek.Characterization of forward-directivity ground motions in the near-fault region[J].Soil Dynam Earthquake Eng.,2004,24:815-828.
[8]MAVROEIDIS G P,PAPAGEORGIOUS A S.A mathematical representation of near-fault ground motions[J].Bull.Seism.Soc.Am.2003,93:1099-1131.
[9]刘晓通.滑移隔震结构在近断层地震作用下的能量分析[D].西安:西安建筑科技大学,2011.LIU Xiao-tong.The simplified of energy analysis based on sliding base isolation structure under the action[D].Xi′an:Xi′an Univ.of Arch.&Tech,2011.
[10]熊仲明,史庆轩,李菊芳.框架结构基于能量地震反应分析及设计方法的理论研究[J].世界地震工程,2005,121(2):141-146.XIONG Zhong-ming,SHI Qing-xuan,LI Ju-fang Theoretical study on seismic response and design method of[],,():
[11]杨文星.单自由度体系非线性地震能量反应分析[D].西安:西安建筑科技大学,2002.YANG Wen-xing.Nonlinear analysis on seismic energy response of SDOF system[D].Xi′an:Xi′an Univ.of Arch.&Tech,2002.
[12]熊仲明,王佳,郭瑜.基于耗能减震结构耗能装置的优化设置的研究[J].西安建筑科技大学学报:自然科学版,2011,43(2):166-171.XIONG Zhong-ming,WANG Jia,GUO Yu.Resarch on optimization setting based on passive energy dissipation structural device[J].Xi′an Univ.of Arch.&Tech.:Natural Science Edition,2011,43(2):166-171.
[2]姚谦峰,梅占馨,吴敏哲.滑移隔震结构振动分析[J].西安建筑科技大学学报:自然科学版,1999,31(3),208-210.YAO Qian-feng,MEI Zhan-xin,WU Min-zhe.Vibration analysis of structure base isolated by sliding[J].Xi′an Univ.of Arch.&Tech:Natural Science Edition,1999,31(3):208-210.
[3]毛利军,李爱群.多层滑移隔震建筑结构的简化模型及分析精度[J].建筑结构学报.2005,26(2):117-123.MAO Li-jun,LI Ai-qun.The simplified models and their precision for analysis of multi-story sliding isolated structures[J].Journal of building structures,2005,26(2):117-123.
[4]姚谦峰,夏禾.基础滑移隔震结构振动特性分析[J].世界地震工程,2001,17(1):50-55.YAO Qian-feng,XIA He.Analysis of vibration properties of structures with sliding base isolation[J].World information on earthquake engineering,2001,17(1):50-55.
[5]NICOS Makris,CHANG Shih-Po.Effect of viscous,viscoplastic and fricti-on damping on the response of seismic isolated structures[J].Earthquake Engineering and Structural Dynamics,2000,29:85-107.
[6]李新乐,朱唏.考虑场地和震源机制的近断层地震动衰减特性的研究[J].工程地质学报.2004,12(2):141-147.LI Xin-le,ZHU Xi.Attenuation of near-fault ground motions based on site and focal the study mechanism[J].Journal of engineering geology,2004,12(2):141-147.
[7]BRAY J D,RODRIGUEZ Marek.Characterization of forward-directivity ground motions in the near-fault region[J].Soil Dynam Earthquake Eng.,2004,24:815-828.
[8]MAVROEIDIS G P,PAPAGEORGIOUS A S.A mathematical representation of near-fault ground motions[J].Bull.Seism.Soc.Am.2003,93:1099-1131.
[9]刘晓通.滑移隔震结构在近断层地震作用下的能量分析[D].西安:西安建筑科技大学,2011.LIU Xiao-tong.The simplified of energy analysis based on sliding base isolation structure under the action[D].Xi′an:Xi′an Univ.of Arch.&Tech,2011.
[10]熊仲明,史庆轩,李菊芳.框架结构基于能量地震反应分析及设计方法的理论研究[J].世界地震工程,2005,121(2):141-146.XIONG Zhong-ming,SHI Qing-xuan,LI Ju-fang Theoretical study on seismic response and design method of[],,():
[11]杨文星.单自由度体系非线性地震能量反应分析[D].西安:西安建筑科技大学,2002.YANG Wen-xing.Nonlinear analysis on seismic energy response of SDOF system[D].Xi′an:Xi′an Univ.of Arch.&Tech,2002.
[12]熊仲明,王佳,郭瑜.基于耗能减震结构耗能装置的优化设置的研究[J].西安建筑科技大学学报:自然科学版,2011,43(2):166-171.XIONG Zhong-ming,WANG Jia,GUO Yu.Resarch on optimization setting based on passive energy dissipation structural device[J].Xi′an Univ.of Arch.&Tech.:Natural Science Edition,2011,43(2):166-171.
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