MODELLING WAVE-INDUCED RESIDUAL PORE PRESSURE AND DEFORMATION OF SAND FOUNDATIONS UNDERNEATH CAISSON BREAKWATERS

Proceedings of the International Conference on Coastal Engineering

Hocine Oumeraci¹  Matthias Kudella²  Hisham El Safti¹ 

[1] Leichtweiss-Institute TU Braunschweig;Coastal Research Centre (FZK) Leibniz Universität Hannover

关键词: caisson breakwater;    sand foundation;    porous flow;    pore pressure;    plasticity;   

DOI  :  10.9753/icce.v33.structures.56

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A finite volume model is developed for modelling the behaviour of the seabed underneath monolithic breakwaters. The fully coupled and fully dynamic Biot’s governing equations are solved in a segregated approach. Two simplifications to the governing equations are presented and tested: (i) the pore fluid acceleration is completely neglected (the u-p approximation) and (ii) only the convective part is neglected. It is found that neglecting the pore fluid convection does not reduce the computational time for the presented model. Verification of the model results with the analytical solution of the quasi-static equations is presented. A multi-yield surface plasticity model is implemented in the model to simulate the foundation behaviour under cyclic loads. Preliminary validation of the model with large-scale physical model data is presented.

【 授权许可】

Unknown