Seismic Behavior Analysis Of Sloping Field Building Structure Considering Soil-structure Interaction

China is a country with many mountains and much earthquake. Buildings on the slope are more and more popular. But the research on seismic effects of structures on the slope has lagged behind the needs of engineering practice. This thesis discusses the FEM model of structure on slope and analyzes the seismic response of the structure. The contents of the thesis are shown as follows:(1) In the paper, the theory results of the dynamic soil-structure interaction and the research achievements of sloping structural seismic performance are summarized, and the analysis method of sloping structure considering soil-structure interaction are discussed. Through the analysis and comparison of the structure form of sloping building, the suspending structure as the object of study, based on an example of the damage characteristic of suspending structure, seismic damage influence factors are analyzed and summarized.(2) Infinite element boundary is used to simulate the soil boundary effect. Mohr-Coulomb soil constitutive model is chosen to simulate soil nonlinearity. The model of soils is established, calculations of different spectrum characteristics of seismic waves are carried out, and soil filtering and amplification effect are studied.(3) Finite elements for soils, pile, foundation and superstructure are reasonably selected, infinite element boundary is adopted to simulate soil boundary effect. The finite element model is established; characteristics of vibration responses of the structure under different seismic excitation are studied, Dynamic characteristics are obtained with and without considering soil-structure interaction effect are compared through modal analysis. Seismic responses of superstructure with different degree of slope and different height of superstructure on the slope under different seismic excitations are studied, and the impacts of slope degree and height on the slope on sloping structure seismic responses are discussed. Modal analysis showed that soil-structure interaction has changed the dynamic characteristics of the slope structure. Time history analysis indicates that with the increase of the slope, sloping structure earthquake response tends to decrease. With the construction slope height increased, the growth of its top-level peak acceleration remains nearly. The acceleration spectral response analysis showed that three of the selected seismic waves peak roughly in between1~2Hz, the natural frequency of the contrast modal analysis shows that, since the structure of the first4modal control action.