Modeling of the System “Platform – Building Model” with a Seismic Isolation Belt

 Algorithms for the numerical solution of dynamic problems of building models with a seismic-isolating belts when the sliding plane is located at different levels have been developed. The algorithms take into account the nonlinear behavior of the structure associated with displacements in the area of the sliding layer, and allow for modeling taking into account various insulation parameters. A computer program implementing the proposed algorithms has been developed. It allows to calculate the dynamic response of buildings under various seismic effects, taking into account the geometrical and mechanical characteristics of the structure. The program implements numerical methods for integrating equations of motion, which ensures the accuracy and stability of calculations. Calculations of seismic-insulated building models with different system parameters, including the height of the sliding plane location, stiffness of the above-ground part and damping characteristics, have been carried out. The results showing the influence of these factors on the behavior of the structure under seismic loads have been obtained. The analysis of the results showed that the location of the sliding plane has a significant effect on the dynamic response of the building. In particular, the lower location of the sliding layer contributes to the reduction of accelerations transmitted to the above-ground part, which leads to a decrease in internal forces and an increase in the overall seismic resistance of the structure. The proposed algorithms and program can be used in the design of buildings with seismic insulation, as well as in the assessment of their reliability under various seismic effects

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