Análise computacional da interação solo-estrutura em edificações de alvenaria estrutural com fundações em radier estaqueado

Abstract

The present study aims to analyze stress distribution in the walls of a structural masonry building, as well as moments and displacements in the foundation raft, considering the soil-structure interaction through the implementation of a piled raft foundation. Two walls and the raft were analyzed, based on the application of nine combinations of different spring coefficients, both for the raft and the pile, based on the application of Winkler’s theory. The loads applied follow the NBR 6120 (2019) standard, which defines loads to calculate building structures. The model, discretized using the finite element method, was implemented in SAP2000® V18 software. All elements were modeled as shell elements. The material Properties were obtained from the NBR 6118 (2023) for na environmental aggressiveness class II, using C30 concrete, and the NBR 16868-1 (2020) for structural masonry walls with creamic blocks. The soil was simulated by applying springs to nodes representing the piles, while area springs were applied under the raft elements. The results showed that with the formation of the arching effect, stresses migrate to the ends and regions with higher stiffness, and increasing the pile stiffness significantly reduces vertical displacements of the raft, also resulting in a small decrease in bending moments.