Avaliação do comportamento de edifícios de alvenaria estrutural sobre estrutura de transição considerando a interação solo-estrutura e o efeito construtivo

Abstract

This research consisted on the evaluation of the effects caused by the construction sequence and the soil-structure interaction (ISE) in structural masonry buildings up transition structures in reinforced concrete. For this, it was used the equivalent frame model to simulate the interaction between the structural walls in the first floor of the buildings and the support structure in reinforced concrete, and the three-dimensional frame model to simulate the structural walls in the upper floors of building. The analyzes related to the construction sequence consisted of the gradual load and stiffness incorporation during the construction time; while those related to ISE incorporated the effects of the foundations deformability on the stresses distribution in the structure, using linear springs. Four modeling methodologies were developed for two buildings with different geometries. The analyzes consisted on the evaluation of the stresses and displacements of the transition structure (columns and beams), as well as the stresses distribution at the base of the walls, for panels with different types of opening. The results show that the introduction of the ISE and the construction sequence do not affect the stresses routing to the supports, but their intensities, provoking relief or possible need for reinforcement in elements exceed the safety limit. Besides that, it was confirmed that the interaction with the soil reduces the differential settlements of the foundations.