考虑水-饱和土场地-结构耦合时的沉管隧道地震反应分析
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摘要
用理想流体介质模拟水层、流体饱和多孔介质模拟饱和土地层,在理想流体介质与流体饱和多孔介质相连接边界的连续条件基础上,结合已有的对理想流体介质、流体饱和多孔介质进行动力反应分析的显式有限元方法,开考虑地层与结构的动力相互作用,建立了进行水与场地、结构耦合动力分析的方法。利用该方法对沉管隧道的地震响应进行了研究,重点分析了水深、地质条件等因素对沉管隧道地震反应的影响,并从中得出了一些可供相关人员进行沉管隧道抗震分析时参考的结论。
In this paper,considering dynamic soil-structure interaction,an explicit finite element method to analyze the dynamic responses of water-stratum-structure coupled systems was developed on the basis of the numerical simulation of the continuous condition on the boundary between water and stratum,where the water was modeled as ideal fluid medium,the saturated soil stratum was modeled as saturated porous medium and the structure was modeled as single-phase elastic medium.By using this method,the earthquake responses of the immersed tunnel were studied on some different conditions,such as different water depths and different soil properties.All these studies can be helpful to establish perfect structure design methods for the immersed tube tunnel.
In this paper,considering dynamic soil-structure interaction,an explicit finite element method to analyze the dynamic responses of water-stratum-structure coupled systems was developed on the basis of the numerical simulation of the continuous condition on the boundary between water and stratum,where the water was modeled as ideal fluid medium,the saturated soil stratum was modeled as saturated porous medium and the structure was modeled as single-phase elastic medium.By using this method,the earthquake responses of the immersed tunnel were studied on some different conditions,such as different water depths and different soil properties.All these studies can be helpful to establish perfect structure design methods for the immersed tube tunnel.
引文
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[2]陈贵红,高波,赵玉光.沉管隧道抗震研究[J].地震研究,2006,29(1):60-64. Chen G H,Gao B,Zhao Y G.Earthquake-resistant research of immersed tunnels[J].Journal of Seismological Research,2006,29(1):60-64.
[3]李伟华.含饱和土的复杂局部场地波动散射问题的解析解和显式有限元数值模拟[D].北京:北京交通大学,2004. Li W H.Analytical solutions and numerical simulation of the scattering of plane waves by local sites with saturated soil[D].Beijing:Beijing Jiaotong Unversity, 2004.
[4]王维佳.粘性可压缩流体中的波[J].地球物理学报, 1984,27(1):84-93. Wang W J.The waves in viscous compressible fluid [J].Chinese Journal of Geophys,1984,27(1):84-93.
[5]王进廷.两相饱和多孔介质与其它介质偶连时的动力显式有限元法[D].北京:北方交通大学,1998. Wang J T.Dynamic analysis of fluid-saturated porous media and other medium by using explicit finite element method[D].Beijing:Northern Jiaotong Unversity, 1998.
[6]Biot M A.Theory of propagation of elastic wave in fluid-saturated porous soil[J].The Journal of the Acoustical Society of America,1956,28(2):168-178.
[7]赵成刚,王进廷,史培新,等.流体饱和两相多孔介质动力反应分析的显式有限元法[J].岩土工程学报,2001, 23(2):178-182. Zhao C G,Wang J T,Shi P X,et al.Dynamic analysis of fluid-saturated porous media by using explicit finite element method[J].Chinese Journal of Geotechnical Engineering,2001,23(2):178-182.
[8]布列霍夫斯基赫.分层介质中的波[M].北京:科学出版社,1985. Brekhovskikh.Waves in Layered Media[M].Beijing: Science Press,1985.
[9]Li W H,Zhou Q F.The seismic response analysis of the subway station in saturated soft soil[J].Journal of Harbin Institute of Technology(New Series), 2009,16(S1 ):128-134.
[10]廖振鹏.工程波动理论导引[M].北京:科学出版社, 1996. Liao Z P.The Guidance of Wave Theory in Engineering [M].Beijing:Science Press,1996.
[11]李小军.非线性场地地震反应分析方法的研究[D].哈尔滨:中国地震局工程力学研究所,1993. Li X J.Study on the method for analyzing the earthquake response of nonlinear site[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration, 1993.
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