Abstract:Previous studies on the factors influencing the seismic performance of buildings are confined to external conditions such as construction materials and technical methods. The influence of the safety factor of foundation soils and foundation pit conditions is often neglected, and this weakens the seismic performance of buildings. Therefore, in this study, the influence of foundation pit pile rows on the seismic performance of buildings is analyzed. Through the finite element strength reduction method, the safety factor of soil and the judging standards of the foundation pit condition were obtained, which helped to obtain the calculation parameter of each soil layer. Based on these parameters and the ABAQUS finite element software, the Mohr-Coulomb elasto-plastic soil model and a two-dimensional elastic pile model were adopted to establish a finite element analysis model of pile rows in a foundation pit. An experimental analysis method was used to analyze the seismic performance of a building from the aspects of row spacing and stiffness of the foundation pit. The experimental results show that if the foundation pit pile row spacing is properly selected, the seismic performance of the building would be effective. The greater the stiffness of the double-row piles, the better the seismic performance of the building, which tended to be stable with the increase of piles stiffness.