近场地震动特性及其弹性与塑性谱的研究
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摘要
结构在近场地震动作用下的反应和远场地震动作用下的明显不同,这主要是由近场地震动高能量的速度脉冲等特征决定的。通过对110条近场地震动记录的分析,得到了相应的弹性反应谱,并通过对近场地震动和远场地震动作用下结构塑性分析进行对比,得到了以下结论:近场地震动作用下结构的弹性反应谱与规范谱明显不同,尤其在长周期阶段,表明规范谱值偏小;近场地震动作用对结构提出了更高的强度和变形需求。
Near-field earthquakes result in quite different structural responses from far-field earthquakes,which is mainly due to the characteristic of high-power velocity pulses for near-field earthquakes.In this paper,elastic and inelastic response spectra are obtained based on the analysis of 110 near-field ground motion records.Comparison of response spectra for near-field and far-field earthquakes is conducted and the results show that the near-field earthquake has a distinct response spectrum compared to the design spectrum,especially in the long-period range.The near-field earthquake shows much higher demand of strength and deformation.
Near-field earthquakes result in quite different structural responses from far-field earthquakes,which is mainly due to the characteristic of high-power velocity pulses for near-field earthquakes.In this paper,elastic and inelastic response spectra are obtained based on the analysis of 110 near-field ground motion records.Comparison of response spectra for near-field and far-field earthquakes is conducted and the results show that the near-field earthquake has a distinct response spectrum compared to the design spectrum,especially in the long-period range.The near-field earthquake shows much higher demand of strength and deformation.
引文
[1]Hall JF,Heaton TH,Halling MW,et al.Near-source ground motions and its effects on flexible buildings[J].Earthquake Spectra,1995,11(4):569-605.
[2]GB50011-2001.建筑抗震设计规范[S].
[3]王京哲.近场地震速度脉冲下的反应谱加速度敏感区[J].中国铁道科学,2003,24(6):27-30.
[4]杨迪雄,李刚,程耿东.近场脉冲型地震动作用下隔震结构地震反应分析[J].地震工程与工程振动,2005,25(2):119-124.
[5]Hall JF,Heaton TH,Halling MW,et al.Near-source ground motions and its effects on flexible buildings[J].Earthquake.Spectra,1995,11(4):569-605.
[6]胡聿贤.地震工程学[M].北京:地震出版社,1988.
[7]王国权,周锡元,马宗晋,等.921台湾地震近场强地面运动反应谱与中美规范的对比研究[J].工程抗震,2000(增刊):1-10.
[8]http://peer.berkeley.edu/smcat/search.
[9]胡聿贤.《中国地震动参数区划图》宣贯教材[M].北京:中国标准出版社,2001.86-87
[10]Iwan W D,Huang C T,Guyader A C.Importantfeatures of the response of inelastic structures to near-field ground motions[C]//Proceedings of 12W CEE.Auckland,New Zealand:2000
[11]Chopra A K,Chintanapakdee C.Comparing response of SDF systems to near-fault and far-fault earthquake motions in the context of spectral regions[J].Earthquake Engineering and Structural Dynamics,2001,30(12):1769-1789.
[12]Newmark N M,HallW J.Earthquake spectra and design[M].EER I,Berkeley,California,1982.
[2]GB50011-2001.建筑抗震设计规范[S].
[3]王京哲.近场地震速度脉冲下的反应谱加速度敏感区[J].中国铁道科学,2003,24(6):27-30.
[4]杨迪雄,李刚,程耿东.近场脉冲型地震动作用下隔震结构地震反应分析[J].地震工程与工程振动,2005,25(2):119-124.
[5]Hall JF,Heaton TH,Halling MW,et al.Near-source ground motions and its effects on flexible buildings[J].Earthquake.Spectra,1995,11(4):569-605.
[6]胡聿贤.地震工程学[M].北京:地震出版社,1988.
[7]王国权,周锡元,马宗晋,等.921台湾地震近场强地面运动反应谱与中美规范的对比研究[J].工程抗震,2000(增刊):1-10.
[8]http://peer.berkeley.edu/smcat/search.
[9]胡聿贤.《中国地震动参数区划图》宣贯教材[M].北京:中国标准出版社,2001.86-87
[10]Iwan W D,Huang C T,Guyader A C.Importantfeatures of the response of inelastic structures to near-field ground motions[C]//Proceedings of 12W CEE.Auckland,New Zealand:2000
[11]Chopra A K,Chintanapakdee C.Comparing response of SDF systems to near-fault and far-fault earthquake motions in the context of spectral regions[J].Earthquake Engineering and Structural Dynamics,2001,30(12):1769-1789.
[12]Newmark N M,HallW J.Earthquake spectra and design[M].EER I,Berkeley,California,1982.
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