Dynamic Interaction Test And Numerical Simulation Of Ground-Nuclear Power Plant

In order to meet the seismic requirements of non-bedrock site selection for nuclear power plant,a series of shaking table model tests of raft-multilayer frame shear wall structure in soil foundation are carried out in this paper.In order to meet the seismic requirements of non-bedrock site selection for nuclear power plant,the shaking table model test of raft-multilayer frame shear wall structure in soil foundation is carried out in this paper,and the numerical simulation of the shaking table model is carried out with ABAQUS finite element software.The specific research work and achievements are as follows:1)Overview of theoretical research on soil-structure dynamic interactionIn this paper,the research status and achievements of soil-structure dynamic interaction at home and abroad are systematically summarized,and the shaking table test and numerical simulation analysis of soil-structure dynamic interaction at home and abroad are reviewed.The main research contents and experimental and numerical analysis methods adopted in this paper are clarified.2)Dynamic interaction test of shaking table of soil-raft-multistory frame shear wall structure in nuclear power plantA series of shaking table tests for nuclear power plant with soil foundation are designed and completed,including the shaking table tests with rigid foundation fixed directly on the shaking table.Experiments on the interaction between the raft pit soil model and the horizontal surface homogeneous soil model;Dynamic interaction test of foundation soil-raft foundation-shaking table of nuclear power plant.The dynamic interaction law of soil-foundation-structure was studied by analyzing the macroscopic test phenomenon and the test data of various test conditions in detail.The results show that the effect of motion interaction is not obvious,and the soil-junction dynamic interaction is mainly inertial interaction.Considering soil-junction dynamic interaction can effectively reduce the dynamic response of superstructure.The shallow raft foundation may cause the swaying motion of the superstructure layer and increase the displacement response of the superstructure.3)Finite element analysis of shaking table test model of soil-raft-multistory frame shear wall structure in nuclear power plantThe finite element model of soil and superstructure in shaking table test was established by using ABAQUS finite element software.The comparison between numerical calculation and experimental results shows that the numerical calculation and experimental results are in good agreement qualitatively,which verifies the reliability of finite element modeling method and related parameter setting.Then,the finite element software ABAQUS is used to simulate more working conditions of the shaking table test model,and further explore the characteristics of soil-structure dynamic interaction.The results show that the finite element modeling and numerical simulation results can be verified by shaking table model test,and the finite element modeling method presented in this paper can be extended to seismic response analysis of actual nuclear power plant.