抄録
A finite element analysis for the pipeline-seabed interaction problem is carried out in order to simulate both the pipeline movement and the pore water pressure accumulation in seabed due to the horizontal cyclic loading of pipeline. The cyclic movement behaviour of pipeline, the effective stress path and the shear stress-strain relationship in seabed during horizontal cyclic loading of pipeline are numerically investigated through some examples from the viewpoint of the ratio of horizontal load to vertical one and the seabed characteristics. Pipeline movement during horizontal cyclic loading greatly depends on not only the frequency of horizontal cyclic load but also the seabed characteristics around the pipeline.
