Study on influence of different buried depth of steel cylindrical breakwater on seismic stability of structure

Taking the steel cylindrical breakwater structure as the research object which is located in a port of high seismic area, the research method of numerical simulation and indoor shaking table test were used, to investigate the influence of different buried depths on seismic stability of steel cylindrical structures. The displacement and acceleration time-history curves of different depth-ratio structures and the distribution of shear stress in the soil before and after earthquake were obtained under different peak accelerations. The results show that the depth ratio, the peak acceleration and the soil pressure, are important parameters which influence the seismic stability of steel cylindrical structures, and they are closely related. With the increase of the buried depth ratio, the seismic displacement response and the acceleration response at the top of the cylinder show the opposite trend, and the variation of the shear stress of the soil around the cylinder is quite different before and after earthquake. Based on the site conditions and earthquake resistance level of the project, in order to ensure the normal use of the steel cylindrical structure, a reasonable range of the depth ratio of the structure is presented.