Seismic Response Analysis Of Interaction About The Upper Structure, Pile Foundation And The Foundation Soil Of High-rise Building

For the upper structure, pile foundation and soil of the coupling system dynamicinteraction, because involves in not many factors such as structure, under the pile groupfoundation makes this subject in recent years, structural dynamics and one of the mostcomplicated subjects in soil dynamics. Tongji university, LvXilin, etc, on the basis ofconventional evenly on the soil test and further realize the stratified soil-foundation-high-rise frame structure interaction system of shaking table model test, this is our countryfirst introduced comprehensively building-basis-foundation of interaction of indoormodel test. Through the frame structure-1/2scale model of pile-soil structure dynamicinteraction of the field test,the equality of man of ShangShouping Hunan universityestablish the test model of the structure of the three-dimensional finite element analysismodel, based on the experimental model of calculating the reliability of the finite elementmodel was verified. Chongqing university JiShuYan Etal., probes into the soil-structuredynamic interaction effects on structural elastic-plastic deformation.As you can see it in the pile-soil-structure dynamic interaction numericalsimulation, there exist the following problems：pile seismic response calculation ofsimplified remains to be further discussed;pile-soil-structure dynamic interactionequations of motion, and the analysis methods of the research still to be developed;theconstitutive relation of soil structure and the processing is still in the choice of previousempirical; connection of different types of unit selection and artificial boundaries on bothsides of the pile soil system is questionable;playing field material properties equivalentmaterial properties and meshing is unconvincing; Fifteen layers of frame-shear wallstructure in this paper a dynamic finite element analysis, discusses the stratification of soilof pile-soil-structure interaction influence, gets some useful conclusions for engineeringpractice.This article studies mainly in the following steps: first of all, the theoreticalanalysis part simply introduces the theory of calculation methods of pile soil contactanalysis;secondly, on the choice of finite element analysis method, the specific contactanalysis method and the model of lumped mass method is introduced, comparing twomethods advantages and disadvantages, choose method of lumped mass model as aresearch method in this paper; after entered the stage of modeling analysis, this paper points three modeling, the upper structure uses the layout rules of15layers of frame-shear wall model, the soil selection reference TuZuoQi a geological explorationreport;according to the practical soil layer changes established the model1of a soil layerdepth; A uniform soil for gravel sand model2; According to the conventional designmethod without considering interaction, by fully embedded at the bottom of the solidmodel3.Modeling is completed, start their solution. Finally, in view of three finite elementmodel for modal, time history analysis of the specific data were analyzed.Results showed that the soil condition of upper structure, pile foundation and thefoundation soil seismic response effect significantly, if can interact a lot to carry out theanalysis of quantitative relationship and will make the design closer to the actual responsein earthquake engineering.