并联隔震体系的非弹性能量谱研究
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摘要
并联隔震体系中隔震层耗能能力的大小直接关系到结构在地震作用下的安全性,目前此类结构体系的设计方法没有考虑到隔震结构耗能的特点,而且用来确定地震作用的加速度反应谱也没有涉及地震持时、隔震结构长周期的影响,存在一定的缺陷.本文采用双线性滞回模型,以4种场地土条件下40条强震记录为输入,建立了并联隔震体系单质点的非弹性能量谱,并建议了能量谱曲线峰值和相关参数的取值.工程分析表明,本文建议的能量谱具有一定的可靠性,计算结果偏于安全.
The dissipative ability magnitude of parallel isolation system affects structure security strongly under earthquake.The dissipative feature of base-isolated structure isn't considered in the current design method of parallel base-isolated system,in addition to earthquake duration and long period of base-isolated structure.So,the current design method has some defects.Based on the bilinear hysteretic model,inelastic energy spectrum of parallel isolation system is studied under a world-wide ensemble of 40 earthquake records of four types site.The related parameter span and the peak value of energy spectrum curve are proposed rationally.The analysis of case history indicates that the proposed energy response spectrum has higher reliability.
The dissipative ability magnitude of parallel isolation system affects structure security strongly under earthquake.The dissipative feature of base-isolated structure isn't considered in the current design method of parallel base-isolated system,in addition to earthquake duration and long period of base-isolated structure.So,the current design method has some defects.Based on the bilinear hysteretic model,inelastic energy spectrum of parallel isolation system is studied under a world-wide ensemble of 40 earthquake records of four types site.The related parameter span and the peak value of energy spectrum curve are proposed rationally.The analysis of case history indicates that the proposed energy response spectrum has higher reliability.
引文
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[4]Benavent-Climent A,Pujades L G,Lopez-Almansa F.Design energy input spectra for moderate-seismicity regions[J].Earthquake Engineering and Structural Dynamics,2002,31(5):1151-1172.
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[7]刘哲锋,沈蒲生.地震动输入能量谱的研究[J].工程抗震与加固改造,2006,28(4):1-5.
[8]荣强.并联隔震体系地震总输入能量的影响因素分析[J].烟台大学学报:自然科学与工程版,2010,23(3):229-232.
[9]Sucuoglu H,Nurtug A.Earthquake ground motion char-acteristics and seismic energy dissipation[J].EarthquakeEngineering and Structural Dynamics,1995,24(9):1195-1213.
[10]中华人民共和国建设部.GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[11]Trifunac M D,Brady A G.A study on the duration ofstrong earthquake ground motion[J].Bulletin of the Seismo-logical Society of America,1975,65(3):581-626.
[2]Uang C M,Bertero V V.Evaluation of seismic energy instructures[J].Earthquake Engineering and Structural Dy-namics 1990,19(1):77-90.
[3]Fajfar P,Vidic T.Consistent inelastic design spectra:hysteretic and input energy[J].Earthquake Engineering andStructural Dynamics 1994,23(5):523-537.
[4]Benavent-Climent A,Pujades L G,Lopez-Almansa F.Design energy input spectra for moderate-seismicity regions[J].Earthquake Engineering and Structural Dynamics,2002,31(5):1151-1172.
[5]Decanini L D,Mollaioli F.Formulation of elastic earth-quake input energy spectra[J].Earthquake Engineering andStructural Dynamics,1998,27(12):1503-1522.
[6]Riddell R,Garcia J E.Hysteretic energy spectrum anddamage control[J].Earthquake Engineering and StructuralDynamics,2001,30(12):1791-1816.
[7]刘哲锋,沈蒲生.地震动输入能量谱的研究[J].工程抗震与加固改造,2006,28(4):1-5.
[8]荣强.并联隔震体系地震总输入能量的影响因素分析[J].烟台大学学报:自然科学与工程版,2010,23(3):229-232.
[9]Sucuoglu H,Nurtug A.Earthquake ground motion char-acteristics and seismic energy dissipation[J].EarthquakeEngineering and Structural Dynamics,1995,24(9):1195-1213.
[10]中华人民共和国建设部.GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[11]Trifunac M D,Brady A G.A study on the duration ofstrong earthquake ground motion[J].Bulletin of the Seismo-logical Society of America,1975,65(3):581-626.
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