Structural Design Method And Seismic Performance Analysis Of Floating Bodies In Epeirogenic Engineering

The use of floating body structures for expanding epeirogenic island project construction has been brought to the attention of the many coastal countries and regions,become an important way of the human activities related to island reef waters off the development and utilization of coastal zone.In view of the actual demand of building large floating body structure expansion epeirogenic island project and floating body structure dynamic stability less research under the action of earthquake,this paper designs a new type(T-shape)expansion island epeirogenic floating body structure,numerical simulation method is applied to analyze the floating body dynamic response of structure under seismic action.Hope that this article research has certain reference value and practical significance for the design method and seismic design of the floating body structure on epeirogenic island building land area.In this paper,the specific work and research results are as follows:1)A new method of rapid construction related engineering expanding epeirogenic island is proposed.Building bottom-pile type and assemble prefabricated floating body structure on the requirement-relevant waters near islands can achieve the purpose of expanding epeirogenic island quickly,and the concrete design scheme of this new type of floating body structure form is given.2)In the theoretical basis of interaction with the structure and soil,water,the whole 3d finite element model with the seabed soil structure was established By finite element software ABAQUS,and the two materials(soil and steel)in the whole model were carried out relative damping calculation by using ABAQUS own frequency analysis.Then on the seabed soil ground stress balance,the stress and displacement response of the structure were examined in the normal load condition.3)Based on additional quality method of considering of the dynamic water pressure during the earthquake,the standard research is mainly focused on the displacement,acceleration and the rule of the stress response of the floating body structure of expanding the epeirogenic island under the action of often encounter and rarely met earthquake,and by the finite element calculation result the conclusion of seismic analysis and research were given.Finally through a contrastive analysis of two cases between in-water and out-water surrounding structure,the action of hydrodynamic pressure effect on the dynamic response of the floating body structure is studied in three different seismic wave.4)Based on this study,the recommendations for code for seismic design of floating body structures for expanding epeirogenic island is proposed.