考虑水-饱和土场地-结构耦合时的沉管隧道地震反应分析

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。

Seismic Response Analysis of Immersed Tube Tunnel Considering the Dynamic Interactions between Water, Stratum and Structure Influence of Liquid Parameters on the Damage of Buried Pipeline

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.