基于相位差谱的多点激励人工波数值生成算法研究
|
摘要
在三角级数时域合成与快速离散傅里叶变换频域调整算法的基础上,实现基于对数正态分布相位差谱的单点激励人工波的数值生成,着重分析了目标反应谱的迭代拟合技术.结合相关建筑标准中所列地震波,给出了四类场地土的相位差谱统计特征,以利于工程采用.并以描述频谱幅值衰减关系的相干函数与以相位表征的行波效应为条件,实现多点激励地震波的数值生成.同时考虑幅值与相位两因素,保证了多点激励地震波在相邻两近点处的地震位移曲线的一致性合理条件.
According to the phase difference spectrum under log-normal distribution,artificial seismic wave for single-support excitation is firstly numerically generated by utilizing the synthesis technique of time-domain trigonometric series and frequency-domain DFFT,for which the iterative procedure is discussed in detail to make the fitting response spectrum consistent with the aim response spectrum.To meet the needs in engineering practice,statistical characteristics of phase difference spectrum are presented for four various ground conditions by analyzing the seismic waves listed in the related construction criterion for earthquake engineering.Furthermore,under the conditions of both coherence function in amplitude spectrum and traveling wave effect in phase spectrum,an advanced numerical generation method for the artificial seismic waves for multi-support excitation is proposed by expanding the single-point excitation wave.Surely,it can be numerically ensured for the displacement convergence among those near sites along the seismic propagating way by considering both the two effects of amplitude and phase.
According to the phase difference spectrum under log-normal distribution,artificial seismic wave for single-support excitation is firstly numerically generated by utilizing the synthesis technique of time-domain trigonometric series and frequency-domain DFFT,for which the iterative procedure is discussed in detail to make the fitting response spectrum consistent with the aim response spectrum.To meet the needs in engineering practice,statistical characteristics of phase difference spectrum are presented for four various ground conditions by analyzing the seismic waves listed in the related construction criterion for earthquake engineering.Furthermore,under the conditions of both coherence function in amplitude spectrum and traveling wave effect in phase spectrum,an advanced numerical generation method for the artificial seismic waves for multi-support excitation is proposed by expanding the single-point excitation wave.Surely,it can be numerically ensured for the displacement convergence among those near sites along the seismic propagating way by considering both the two effects of amplitude and phase.
引文
[1]林伟.大跨度空间结构多维多点非平稳随机地震反应分析[D].天津:天津大学,2005
[2]夏友柏,王年桥,张尚银.一种合成多点地震动时程的方法[J].世界地震工程,2002,18(1):119-122
[3]刘先明,叶继红,李爱群.空间相关多点地震动合成的简化方法[J].工程抗震,2003(1):30-36
[4]董汝博,周晶,冯新.一种考虑局部场地收敛性的多点地震动合成方法[J].振动与冲击,2007,26(4):5-9
[5]OHSAKI Y.On the significance of phase content inearthquake ground motions[J].EarthquakeEngineering and Structural Dynamics,1979,7(5):427-439
[6]杨庆山,姜海鹏,陈英俊.基于相位差谱的时-频非平稳人造地震动的生成[J].地震工程与工程振动,2001,21(3):10-16
[7]杨庆山,姜海鹏.基于相位差谱的时-频非平稳人造地震动的反应谱拟合[J].地震工程与工程振动,2002,22(1):32-38
[8]胡聿贤,何训.考虑相位谱的人造地震动反应谱拟合[J].地震工程与工程振动,1986,6(2):37-51
[9]赵凤新.时程的相位差特性与设计地震动合成[D].北京:中国地震局地球物理研究所,1992
[10]国家地震局.GB 50267—97核电厂抗震设计规范[S].北京:中华人民共和国建设部,1997
[11]屈铁军,王君杰,王前信.空间变化的地震动功率谱的实用模型[J].地震学报,1996,18(1):55-62
[12]中国地震局工程力学研究所.CECS160:2004建筑工程抗震性态设计通则(试用)[S].北京:中国计划出版社,2004
[13]TRUJILLO D M.A new approach to the integrationof accelerometer data[J].Earthquake Engineeringand Structural Dynamic,1982,10:529-535
[14]李建波,陈健云,林皋.相互作用分析中地震动输入长周期校正研究[J].大连理工大学学报,2004,44(4):550-555(LI Jian-bo,CHEN Jian-yun,LIN Gao.Study oflong-period correction of seismic accelerogram fordynamic interaction analysis[J].Journal of DalianUniversity of Technology,2004,44(4):550-555)
[2]夏友柏,王年桥,张尚银.一种合成多点地震动时程的方法[J].世界地震工程,2002,18(1):119-122
[3]刘先明,叶继红,李爱群.空间相关多点地震动合成的简化方法[J].工程抗震,2003(1):30-36
[4]董汝博,周晶,冯新.一种考虑局部场地收敛性的多点地震动合成方法[J].振动与冲击,2007,26(4):5-9
[5]OHSAKI Y.On the significance of phase content inearthquake ground motions[J].EarthquakeEngineering and Structural Dynamics,1979,7(5):427-439
[6]杨庆山,姜海鹏,陈英俊.基于相位差谱的时-频非平稳人造地震动的生成[J].地震工程与工程振动,2001,21(3):10-16
[7]杨庆山,姜海鹏.基于相位差谱的时-频非平稳人造地震动的反应谱拟合[J].地震工程与工程振动,2002,22(1):32-38
[8]胡聿贤,何训.考虑相位谱的人造地震动反应谱拟合[J].地震工程与工程振动,1986,6(2):37-51
[9]赵凤新.时程的相位差特性与设计地震动合成[D].北京:中国地震局地球物理研究所,1992
[10]国家地震局.GB 50267—97核电厂抗震设计规范[S].北京:中华人民共和国建设部,1997
[11]屈铁军,王君杰,王前信.空间变化的地震动功率谱的实用模型[J].地震学报,1996,18(1):55-62
[12]中国地震局工程力学研究所.CECS160:2004建筑工程抗震性态设计通则(试用)[S].北京:中国计划出版社,2004
[13]TRUJILLO D M.A new approach to the integrationof accelerometer data[J].Earthquake Engineeringand Structural Dynamic,1982,10:529-535
[14]李建波,陈健云,林皋.相互作用分析中地震动输入长周期校正研究[J].大连理工大学学报,2004,44(4):550-555(LI Jian-bo,CHEN Jian-yun,LIN Gao.Study oflong-period correction of seismic accelerogram fordynamic interaction analysis[J].Journal of DalianUniversity of Technology,2004,44(4):550-555)
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