弹性单自由度体系能量反应谱研究
|
摘要
根据反应谱计算理论得到了线性单自由度体系在地震作用下的输入能量谱、阻尼耗能谱、滞回耗能谱以及动能谱计算公式,通过数值计算得到了4种不同类别场地土条件下160条强震记录的输入能量谱,研究了输入能量谱的特点。研究结果表明,能量谱曲线可以分为3段,即短周期的上升段、中等周期的平台段和长周期的下降段。场地类别对能量谱平台段有一定的影响。最后,提出了描述输入能量谱的谱形状的3段式曲线方程,回归得到了输入能量谱的简化计算公式,验证了简化计算公式的合理性。
According to the spectrum analysis theory,the energy spectrum formulas were developed,which could be used to compute input energy spectrum,damping energy spectrum,hysteric energy spectrum and kinetic energy spectrum of elastic SDOF systems under earthquakes.Input energy spectrum were obtained for 160 records of strong earthquakes in four site conditions.The input energy spectrum curve is composed of three sections: the increase section for short periods,the plateau section for medium periods and the decrease section for long periods.Among them,the plateau section is affected by the site condition.Simplified formulas are proposed to describe the variation of spectrum curves,and whose rationality is verified.
According to the spectrum analysis theory,the energy spectrum formulas were developed,which could be used to compute input energy spectrum,damping energy spectrum,hysteric energy spectrum and kinetic energy spectrum of elastic SDOF systems under earthquakes.Input energy spectrum were obtained for 160 records of strong earthquakes in four site conditions.The input energy spectrum curve is composed of three sections: the increase section for short periods,the plateau section for medium periods and the decrease section for long periods.Among them,the plateau section is affected by the site condition.Simplified formulas are proposed to describe the variation of spectrum curves,and whose rationality is verified.
引文
[1]Housner G.Limit design of structures to resist earthquakes[C]//Proceedings of the first world conference onearthquake engineering,UA:Berkeley.1956,5:1-11.
[2]Erberik A,Sucuoglu H.Seismic energy dissipation indeteriorating systems through low-cycle fatigue[J].Earthquake Engineering and Structural Dynamics,2004,33(1):49-67.
[3]Luis D Decanini,Fabrizio Mollaioli.Formulation of elasticearthquake input energy spectra[J].Earthquake Engineeringand Structural Dynamics,1998,27(12):1503-1522.
[4]Fajfar P,Vidic T,Fischinger M.Amearsure of earthquakemotion capacity to damage medium-period structures[J].Soil Dynamics and Earthquake Engineering,1990,9(5):236-242.
[5]Chai Y H,Fajfar P.A procedure for estimating inputenergy spectra for seismic design[J].Journal ofEarthquake Engineering,2000,4(4):539-561.
[6]Riddell R,Garcia J E.Hysteretic energy spectrum anddamage control[J].Earthquake Engineering and StructuralDynamics,2001,30(12):1791-1816.
[7]Manfredi G.Evaluation of seismic energy demand[J].Earthquake Engineering and Structural Dynamics,1995,30(4):1195-1213.
[8]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.
[9]程光煜,叶列平.弹性SDOF系统的地震输入能量谱[J].工程抗震与加固改造,2006,28(5):1-8.
[10]GB 50011—2001建筑抗震设计规范[S].
[2]Erberik A,Sucuoglu H.Seismic energy dissipation indeteriorating systems through low-cycle fatigue[J].Earthquake Engineering and Structural Dynamics,2004,33(1):49-67.
[3]Luis D Decanini,Fabrizio Mollaioli.Formulation of elasticearthquake input energy spectra[J].Earthquake Engineeringand Structural Dynamics,1998,27(12):1503-1522.
[4]Fajfar P,Vidic T,Fischinger M.Amearsure of earthquakemotion capacity to damage medium-period structures[J].Soil Dynamics and Earthquake Engineering,1990,9(5):236-242.
[5]Chai Y H,Fajfar P.A procedure for estimating inputenergy spectra for seismic design[J].Journal ofEarthquake Engineering,2000,4(4):539-561.
[6]Riddell R,Garcia J E.Hysteretic energy spectrum anddamage control[J].Earthquake Engineering and StructuralDynamics,2001,30(12):1791-1816.
[7]Manfredi G.Evaluation of seismic energy demand[J].Earthquake Engineering and Structural Dynamics,1995,30(4):1195-1213.
[8]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.
[9]程光煜,叶列平.弹性SDOF系统的地震输入能量谱[J].工程抗震与加固改造,2006,28(5):1-8.
[10]GB 50011—2001建筑抗震设计规范[S].
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心