Simulation of Seismic Impact on Multistory Buildings on Piles by Grid-Characteristic Method on Cartesian and Nonconformal Curved Meshes

Construction in the Far North requires taking into account weather conditions. Different conditions result in different soil subsidence. These circumstances require the use of a special type of foundation for a multistory building, i.e., a pile foundation. We have developed the computational method and software for determining the seismic resistance of buildings in the Far North, allowing one to vary and take into account the number of floors, entrances, ceiling heights, frequency of pile arrangement, length and thickness of piles elastic and strength characteristics of materials, the form of soil subsidence, soil type, profile and type of incident seismic waves. In the test calculations in this manuscript, we varied the number of floors and entrances, the type of seismic wave, soil elastic properties, the pile frequency and determined the pile strength for all these sets of problem statements depending on the form of soil subsidence. We use the computational method from the family of grid-characteristic methods on a system of nonconformal curvilinear and Cartesian computational grids. A feature of this computational method is the saving of computing resources due to the following factors. Where possible, we use Cartesian computational grids. To account for arbitrary soil subsidence, we use curvilinear structured computational grids that are conformal with adjacent Cartesian computational grids. In this case, two adjacent curvilinear grids are nonconformal to each other. But we construct them in such a way that it is possible to use linear interpolation, which also allows one to save computational resources.