基于目标反应谱和包线的地震动合成
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摘要
本文给出了以目标反应谱和目标包线函数为双目标函数的人工地震动合成方法,不仅使人工地震动符合目标反应谱,还在迭代过程中对地震动波形进行调整,使之基本符合目标包线函数,并消除了加速度时程的基线偏移,使速度时程和位移时程更为合理。本文认为当研究非线性结构体系的动力反应规律时,有必要对输入的人工地震动时程的反应谱和包线均进行比较准确的控制,使人工地震动时程符合多个统计特征。
The authors put forward a method that takes the response spectrum and the enveloping curve as the double target functions to synthesize the artificial ground motion.The method not only makes the response spectrum of the artificial ground motion comply with the target spectrum,but also in the iterative process adjusts the ground motion wave-shape to conform to the goal enveloping curve function approximately,and eliminates the base-line shift in the acceleration time history,then makes the velocity and displacement time histories of ground motion more reasonable.The authors argue that it may be necessary to make the artificial ground motions accord with both the target response spectrum and the target enveloping function,when the dynamic response characteristics of certain nonlinear structural system are studied.
The authors put forward a method that takes the response spectrum and the enveloping curve as the double target functions to synthesize the artificial ground motion.The method not only makes the response spectrum of the artificial ground motion comply with the target spectrum,but also in the iterative process adjusts the ground motion wave-shape to conform to the goal enveloping curve function approximately,and eliminates the base-line shift in the acceleration time history,then makes the velocity and displacement time histories of ground motion more reasonable.The authors argue that it may be necessary to make the artificial ground motions accord with both the target response spectrum and the target enveloping function,when the dynamic response characteristics of certain nonlinear structural system are studied.
引文
[1]Trifunac MD.A method for synthesizing realistic strong ground motion[J].Bull.Seism.Soc.Amer.1971,61:1739-1753.
[2]Wong HL,Trifunac MD.Generation of artificial strong motion accelerograms[J].Earthq.Eng.Struct.Dyn,1979,7:509-528.
[3]胡聿贤,何训.考虑相位谱的人造地震动反应谱的拟合[J].地震工程与工程震动,1986,6(2):37-51.
[4]Boore D M.Simulation of ground motion using the stochastic method[J].Pure Appl.Geophys,2003(160):635-676.
[5]蔡长青,沈建文.人造地震动的时域叠加法和反应谱整体逼近技术[J].地震学报,1997,19(1):71-78.
[6]Ohsaki Y.On the significance of phase content in earthquake ground motions[J].Earthquake Engineering and Structural Dynamics,1979,7(5):427-439.
[7]朱昱,冯启民.相位差谱的分布特征和人造地震动[J].地震工程与工程振动,1992,12(1):37-44.
[8]金星,廖振鹏.地震动强度包线函数的理论研究[J].地震学报,1994,16(4)519-525.
[9]金星,廖振鹏.强地震动相位特征的统计规律性[J].地震学报,1994.16(1):106-110.
[10]霍俊荣,胡聿贤,冯启民.地面运动时程强度包线函数的研究[J].地震工程与工程振动,1991,11(1):1-12.
[11]Chopra A K,Goel R K.Capacity-demand-diagram methods for estimating seismic deformation of inelastic structures:SDF systems[R].Berke-ley:Pacific Earthquake Engineering Research Center,College of Engineering University of California,1999.
[12]Fajfar P.Capacity spectrum method based on inelastic demand spectra[J].Earthquake Engineering and Structural Dynamics,1999,28:979-993.
[13]Wang Guo Quan,Boore D M,Igel H,et al.Some observations on colocated and closely-spaced strong ground motion records of the 1999,Chi-Chi,Taiwan Earthquake[J].Bull.Seism.Soc.Am,2003,93:674-693.
[14]杜修力,胡晓,陈厚群.强震地运动随机过程模拟[J].地震学报,1995,17(1):103-109.
[15]胡聿贤,周锡元.弹性体系在平稳和非平稳化地面运动下的反应[C]//地震工程研究报告集第一集,北京:科学出版社,1962:33-50.
[16]欧进萍,牛荻涛,杜修力.设计用随机地震动模型及其参数的确定[J].地震工程与工程振动,1991,11(3):45-54.
[2]Wong HL,Trifunac MD.Generation of artificial strong motion accelerograms[J].Earthq.Eng.Struct.Dyn,1979,7:509-528.
[3]胡聿贤,何训.考虑相位谱的人造地震动反应谱的拟合[J].地震工程与工程震动,1986,6(2):37-51.
[4]Boore D M.Simulation of ground motion using the stochastic method[J].Pure Appl.Geophys,2003(160):635-676.
[5]蔡长青,沈建文.人造地震动的时域叠加法和反应谱整体逼近技术[J].地震学报,1997,19(1):71-78.
[6]Ohsaki Y.On the significance of phase content in earthquake ground motions[J].Earthquake Engineering and Structural Dynamics,1979,7(5):427-439.
[7]朱昱,冯启民.相位差谱的分布特征和人造地震动[J].地震工程与工程振动,1992,12(1):37-44.
[8]金星,廖振鹏.地震动强度包线函数的理论研究[J].地震学报,1994,16(4)519-525.
[9]金星,廖振鹏.强地震动相位特征的统计规律性[J].地震学报,1994.16(1):106-110.
[10]霍俊荣,胡聿贤,冯启民.地面运动时程强度包线函数的研究[J].地震工程与工程振动,1991,11(1):1-12.
[11]Chopra A K,Goel R K.Capacity-demand-diagram methods for estimating seismic deformation of inelastic structures:SDF systems[R].Berke-ley:Pacific Earthquake Engineering Research Center,College of Engineering University of California,1999.
[12]Fajfar P.Capacity spectrum method based on inelastic demand spectra[J].Earthquake Engineering and Structural Dynamics,1999,28:979-993.
[13]Wang Guo Quan,Boore D M,Igel H,et al.Some observations on colocated and closely-spaced strong ground motion records of the 1999,Chi-Chi,Taiwan Earthquake[J].Bull.Seism.Soc.Am,2003,93:674-693.
[14]杜修力,胡晓,陈厚群.强震地运动随机过程模拟[J].地震学报,1995,17(1):103-109.
[15]胡聿贤,周锡元.弹性体系在平稳和非平稳化地面运动下的反应[C]//地震工程研究报告集第一集,北京:科学出版社,1962:33-50.
[16]欧进萍,牛荻涛,杜修力.设计用随机地震动模型及其参数的确定[J].地震工程与工程振动,1991,11(3):45-54.
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