Numerical Analysis of Seismic Response of Sloping Breakwater Structure in Silty and Fine Sand Base
In response to the structural deformation and safety evaluation of sloping breakwater under earthquake action.Based on the generalized elastic-plastic constitutive model,finite element method is used to analyze the dynamic response of breakwater structures in fine sand under OSE and SSE conditions.The main conclusions obtained from the study are as follows:the amplification factor of the ground peak acceleration in the soft soil foundation compared to the PGA reaches 1.4,which is in line with the classification of site types in the specifications;Under the OSE condition,the liquefaction probability of the fine sand layer is less than 0.3,which is distributed on the surface outside the breakwater.The minimum overall anti-skid safety factor of the breakwater during earthquake is 1.25,which meets the requirements of the code for structural safety;Under SSE condition,the liquefaction probability of the fine sand layer reaches 0.75,and the liquefaction area mainly occurs at the foot of the embankment on the inner side of the bay,the corresponding maximum horizontal displacement on the inner side of the bay reaches 0.9 m,on the sea side reaches 0.25 m,and the vertical displacement reaches 0.85 m.The deformation of the breakwater does not affect the functional performance of the structure and can meet the deformation limit requirements.
Sloping BreakwaterFinite Element ModelLiquefaction of Fine SandDeformation Calculation
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