短峰波作用下饱和海床中的单桩响应分析

发布时间：2018-03-16 20:13

本文选题：短峰波　切入点：饱和砂质海床　出处：《上海交通大学学报》2016年11期 　论文类型：期刊论文

【摘要】：采用准静态三维数值分析方法直接模拟短峰波作用于海床表面与桩身的三维波压力分布,在考虑了海床土体的流固耦合和桩土界面的接触特征的基础上,研究了短峰波荷载作用下饱和砂质海床中的单桩响应问题.根据数值分析结果,研究了波浪荷载作用下土体的孔压变化规律、桩柱的位移和弯矩分布情况,探讨了桩土接触面不同处理方式的影响,并与自由海床和完全埋置单桩的模型结果进行比较.结果表明:泥线附近与桩端处土体的响应局部现象明显;采用桩土耦合模型时,孔压与弯矩响应相比于接触面模型有放大效应,而位移响应则正好相反.完全埋置桩在波浪作用下的响应主要受海床影响,在桩柱伸出海面的模型中,波浪荷载在桩柱上的影响起主导作用.
[Abstract]:The quasi-static three-dimensional numerical analysis method is used to simulate the pressure distribution of the short peak wave acting on the surface of the seabed and the pile body directly. The fluid-solid coupling of the seabed soil and the contact characteristics of the pile-soil interface are considered. The response of single pile in saturated sandy seabed under short peak wave loading is studied. According to the numerical analysis results, the variation law of pore pressure, displacement and moment distribution of pile column under wave load are studied. The effects of different treatment methods on pile-soil interface are discussed, and compared with the model results of free seabed and completely buried single pile. The results show that the response of soil around the mud line and the pile end is obvious, and when the pile-soil coupling model is adopted, Compared with the contact surface model, the pore pressure and the moment response have magnification effect, while the displacement response is just the opposite. The response of completely buried pile under the wave action is mainly affected by the seabed, and in the model where the pile pillar extends out of the sea, The influence of wave load on pile column plays a leading role.
【作者单位】：上海交通大学土木工程系;上海交通大学海洋工程国家重点实验室;
【基金】：国家自然科学基金项目(41372282) 上海市浦江人才计划项目(13PJD017)
【分类号】：TU473.1

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