【作者】 段伦良； 郑东生； 张启博； 杨兵；

【Author】 Duan Lunliang;Zheng Dongsheng;Zhang Qibo;Yang Bing;Department of Bridge Engineering,Southwest Jiaotong University;

【机构】 西南交通大学；

【摘要】 为研究波浪荷载作用下桥梁基础周围海床响应,以跨海桥梁常用的桩-承台复合桩基础为工程对象,建立了波浪-海床-基础相互作用三维数值模型。研究过程中基于ola Foam求解器求解波浪模型,同时有限元软件COMSOL Multiphysics建立多孔介质海床模型。将从波浪模型中求得的海床表面波浪压力作为海床模型的边界条件,通过求解海床模型进而得到海床响应,最终以此判断波浪荷载作用下桥梁基础周围海床的稳定性。首先与以往实验数据验证模型的然后基于模型进一步研究承台淹没深度对桥梁基础周围海床瞬态液化稳定性的影响。研究表明:桥梁基础的存在会对海床中孔隙水压力分布产生一定影响。此外,当承台完全被淹没后,随着承台淹没深度增加,基础周围海床趋于不稳定。更多还原

【Abstract】 To investigate the soil response around a bridge foundation, a three dimensional integrated numerical model is developed in this study, in which the ola Foam solver is used to simulate wave-bridge foundation interaction and the poro-elastic Biot’s equation is applied to govern the soil response. After validated by previous laboratory experiment, the present model is further used to investigate the effects of the cap submerged depth on soil response. Numerical results indicate that the present model can accurately predict the wave-induced soil response and the cap submerged depth can affect the magnitude of the wave-induced pore pressure around the bridge foundation.更多还原