Análise computacional de edifícios de parede de concreto considerando a interação solo-estrutura e o faseamento construtivo

Abstract

The objective of the present work is to analyze three concrete walls buildings molded on site using the finite element software SAP2000, taking into account the influence of the soil-structure interaction and the staged construction. Among the analyzed buildings, two different architectures were used and in one of them two different heights were tested, in order to verify how the architectural difference and the number of pavements can affect the distribution of the loads in the walls and foundations. The walls and slabs of the buildings were modeled as a shell finite elements, while only the foundation beams were modeled as a frame element. Point translation springs coefficients were used in the supports of the foundation beams to simulate the effect of soil-structure interaction. The springs were defined trough the determination of the vertical reaction coefficients (CRV) defined as a function of the estimates soil settlements according to Aoki’s (1979) theory. The staged construction was considered with the “staged construction” feature assistance available in SAP2000 V18 software. After the analysis, a comparison was made between the normal stresses and reaction in the supports of three walls in each building, in order to evaluate how the redistribution of loads occurs in the models. It was verified that the soil-structure interaction results in the migration of the loads to peripheral walls, resulting in percentage differences for the reactions of up to 65,4% of an indeslocable model with respect to a model with soil-structure interaction. It was also observed that the staged construction didn’t cause significant changes in the load distribution, with the largest percentage difference found of 7,1% for the reactions of a simultaneous loading model with respect to a staged loading model.