特大型桥梁桩基完全非平稳随机地震反应分析
|
摘要
考虑地震动的随机性及频率和强度非平稳性,利用作者所提出的基于强度和能量控制的随机地震动模型,建立了非平稳随机地震反应分析方法。以某特大型桥梁群桩基础为研究对象,将群桩-土-桥墩结构体系作为一个整体进行了特大型桥梁桩基非平稳随机地震反应分析。首先,基于目标加速度时程的强度和能量信息确定了作为输入的加速度时-频演变功率谱密度;其次,分析了非平稳随机过程激励下自由场和桥梁桩基相互作用体系的地震反应,探讨了非平稳随机过程激励下的群桩-土-桥墩结构动力相互作用;最后,通过比较强度非平稳随机过程和完全非平稳随机过程激励下桥梁桩基相互作用体系的地震反应,探讨了频率非平稳性对相互作用体系地震反应的影响。
In this paper, the non-stationary stochastic seismic motion model presented by authors is used to analyze stochastic seismic response of a supergiant pile group foundation employed to support the bridge. The pile group-soil-pier structure is treated as a whole and the finite element method and complex response technique are used to perform the analysis. Firstly, the input time-frequency evolutionary power spectrum is defined according to the intensity and energy information of target acceleration time-history. Secondly, stochastic seismic responses of a free field and a pile group-soil-pier structure system under a nonstationary stochastic seismic excitation are analyzed respectively, and the dynamic pile group-soil-pier structure interaction is discussed. Finally, the effects of frequency nonstationarity on seismic responses of the interaction system are discussed.
In this paper, the non-stationary stochastic seismic motion model presented by authors is used to analyze stochastic seismic response of a supergiant pile group foundation employed to support the bridge. The pile group-soil-pier structure is treated as a whole and the finite element method and complex response technique are used to perform the analysis. Firstly, the input time-frequency evolutionary power spectrum is defined according to the intensity and energy information of target acceleration time-history. Secondly, stochastic seismic responses of a free field and a pile group-soil-pier structure system under a nonstationary stochastic seismic excitation are analyzed respectively, and the dynamic pile group-soil-pier structure interaction is discussed. Finally, the effects of frequency nonstationarity on seismic responses of the interaction system are discussed.
引文
[1]Housner G W.Characteristics of strong motion earthquakes[J].Bulletin of the Seismological Society of America,1947,37(1):19―31.
[2]Kanai K.Semi-empirical formula for the seismic characteristics of the ground[J].Bulletin of Earthquake Research Institute,University of Tokyo,Tokyo,Japan,1957,35:309―325.
[3]Tajimi H.A statistical method of determining the maximum response of a building structure during an earthquake[C].Proceedings of the2nd World Conference on Earthquake Engineering,1960,II:781―798.
[4]Clough R W,Penzien J.Dynamics of structures[M].New York,McGraw-Hill,Inc.,1993.
[5]Faravelli L.Stochastic modeling of the seismic excitation for structural dynamics purposes[J].Probabilistic Engineering Mechanics,1988,3(4):189―195.
[6]Bogdanoff J I,Goldberg J E,Bernard M C.Response of a simple structure to a random earthquake-type disturbance[J].Bulletin of the Seismological Society of America,1961,51(2):293―310.
[7]Levy R,Kozin F,Moorman R B B.Random processes for earthquake simulation[J].Journal of Engineering Mechanics,ASCE,1971,97(2):495―517.
[8]Shinozuka M,Sato Y.Simulation of nonstationary random processes[J].Journal of Engineering Mechanics,ASCE,1967,93(1):11―40.
[9]Iyengar R N,Iyengar K T S R.A nonstationary random process model for earthquake accelerograms[J].Bulletin of the Seismological Society of America,1969,59(3):1163―1188.
[10]Saragoni G R,Hart G C.Nonstationary analysis and simulation of earthquake ground motions[R].Report No:UCLA-ENG-7238,Earthquake Engineering and Structures Laboratory,University of California,Los Angeles,California,1972.
[11]Kubo T,Penzien J.Simulation of three-dimensional strong ground motions along principle axes,San Fernando Earthquake[J].Earthquake Engineering and Structure Dynamics,1979,7:279―294.
[12]Lin Y K,Yong Y.Evolutionary Kanai-Tajini earthquake models[J].Journal of Engineering Mechanics,ASCE,1987,113(8):1119―1137.
[13]Yeh C H,Wen Y K.Modeling of nonstationary ground motion and analysis of inelastic structural response[J].Structural Safety,1990,8(1-4):281―298.
[14]Der Kiureghian,Crempien A,Crempien J.An evolutionary model for earthquake ground motion[J].Structural Safety,1989,6(2-4):235―246.
[15]Conte J P.Effects of earthquake frequency nonstationary on inelastic structural response[C].Proceedings of the10th World Conference on Earthquake Engineering,Balkema A A,Rotterdam.The Netherlands,1992.
[16]Biswajit B,Vinay K G.Seismic response of SDOF systems by wavelet modeling of nonstationary processes[J].Journal of Engineering Mechanics,1998,124(10):1142―1150.
[17]Loh C H,Wu T C,Huang N E.Application of the empirical mode decomposition-Hilbert spectrum method to identify near-fault ground-motion characteristics and structural responses[J].Bulletin of the Seismological Society America,2001,91(5):1339―1351.
[18]王志华,陈国兴,刘汉龙.基于强度和能量控制的随机地震动模型研究[J].地震工程与工程振动,2006,26(6):37―43.Wang Zhihua,Chen Guoxing,Liu Hanlong.Stochastic seismic ground motion model based on intensity and energy[J].Earthquake Engineering and Engineering Vibration,2006,26(6):37―43.(in Chinese)
[19]杨伟林,陈国兴,王志华.深厚场地上特大桥墩-群桩-土相互作用体系地震反应特性的二维和三维分析[J].地震工程与工程振动,2003,23(6):124―132.Yang Weilin,Chen Guoxing,Wang Zhihua.2D and3D seismic response analyses of supergiant bridge pier-group piles-soil interaction system on deep overburden layers[J].Earthquake Engineering and Engineering Vibration,2003,23(6):124―132.(in Chinese)
[20]王志华,刘汉龙,陈国兴.基于随机地震反应的桥墩-群桩-土相互作用研究[J].岩土力学,2006,27(3):409―413.Wang Zhihua,Liu Hanlong,Chen Guoxing.Study on pier-pile foundation-soil interaction based on stochastic seismic response[J].Rock and Soil Mechanics,2006,27(3):409―413.(in Chinese)
[2]Kanai K.Semi-empirical formula for the seismic characteristics of the ground[J].Bulletin of Earthquake Research Institute,University of Tokyo,Tokyo,Japan,1957,35:309―325.
[3]Tajimi H.A statistical method of determining the maximum response of a building structure during an earthquake[C].Proceedings of the2nd World Conference on Earthquake Engineering,1960,II:781―798.
[4]Clough R W,Penzien J.Dynamics of structures[M].New York,McGraw-Hill,Inc.,1993.
[5]Faravelli L.Stochastic modeling of the seismic excitation for structural dynamics purposes[J].Probabilistic Engineering Mechanics,1988,3(4):189―195.
[6]Bogdanoff J I,Goldberg J E,Bernard M C.Response of a simple structure to a random earthquake-type disturbance[J].Bulletin of the Seismological Society of America,1961,51(2):293―310.
[7]Levy R,Kozin F,Moorman R B B.Random processes for earthquake simulation[J].Journal of Engineering Mechanics,ASCE,1971,97(2):495―517.
[8]Shinozuka M,Sato Y.Simulation of nonstationary random processes[J].Journal of Engineering Mechanics,ASCE,1967,93(1):11―40.
[9]Iyengar R N,Iyengar K T S R.A nonstationary random process model for earthquake accelerograms[J].Bulletin of the Seismological Society of America,1969,59(3):1163―1188.
[10]Saragoni G R,Hart G C.Nonstationary analysis and simulation of earthquake ground motions[R].Report No:UCLA-ENG-7238,Earthquake Engineering and Structures Laboratory,University of California,Los Angeles,California,1972.
[11]Kubo T,Penzien J.Simulation of three-dimensional strong ground motions along principle axes,San Fernando Earthquake[J].Earthquake Engineering and Structure Dynamics,1979,7:279―294.
[12]Lin Y K,Yong Y.Evolutionary Kanai-Tajini earthquake models[J].Journal of Engineering Mechanics,ASCE,1987,113(8):1119―1137.
[13]Yeh C H,Wen Y K.Modeling of nonstationary ground motion and analysis of inelastic structural response[J].Structural Safety,1990,8(1-4):281―298.
[14]Der Kiureghian,Crempien A,Crempien J.An evolutionary model for earthquake ground motion[J].Structural Safety,1989,6(2-4):235―246.
[15]Conte J P.Effects of earthquake frequency nonstationary on inelastic structural response[C].Proceedings of the10th World Conference on Earthquake Engineering,Balkema A A,Rotterdam.The Netherlands,1992.
[16]Biswajit B,Vinay K G.Seismic response of SDOF systems by wavelet modeling of nonstationary processes[J].Journal of Engineering Mechanics,1998,124(10):1142―1150.
[17]Loh C H,Wu T C,Huang N E.Application of the empirical mode decomposition-Hilbert spectrum method to identify near-fault ground-motion characteristics and structural responses[J].Bulletin of the Seismological Society America,2001,91(5):1339―1351.
[18]王志华,陈国兴,刘汉龙.基于强度和能量控制的随机地震动模型研究[J].地震工程与工程振动,2006,26(6):37―43.Wang Zhihua,Chen Guoxing,Liu Hanlong.Stochastic seismic ground motion model based on intensity and energy[J].Earthquake Engineering and Engineering Vibration,2006,26(6):37―43.(in Chinese)
[19]杨伟林,陈国兴,王志华.深厚场地上特大桥墩-群桩-土相互作用体系地震反应特性的二维和三维分析[J].地震工程与工程振动,2003,23(6):124―132.Yang Weilin,Chen Guoxing,Wang Zhihua.2D and3D seismic response analyses of supergiant bridge pier-group piles-soil interaction system on deep overburden layers[J].Earthquake Engineering and Engineering Vibration,2003,23(6):124―132.(in Chinese)
[20]王志华,刘汉龙,陈国兴.基于随机地震反应的桥墩-群桩-土相互作用研究[J].岩土力学,2006,27(3):409―413.Wang Zhihua,Liu Hanlong,Chen Guoxing.Study on pier-pile foundation-soil interaction based on stochastic seismic response[J].Rock and Soil Mechanics,2006,27(3):409―413.(in Chinese)
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