Aperfeiçoamento de modelagem computacional para análise da interação entre painéis de alvenaria e estrutura de suporte em concreto armado

Abstract

The developed study consists in modifications in the equivalent frame model, developed by Nascimento et al. (2014) and calibrated by Medeiros (2015), for simulating the interaction of structural masonry walls and support structure in reinforced concrete - transition structures. The modifications were made in three ways: first, in rigidities and areas used; later, taking in consideration the crack between the wall and support beam, which was incorporated into the model by removing the vertical frame elements in which had occurred normal force of traction, which resulted, as hope, in internal redistribution of stiffness and efforts. Lastly, in consideration of eccentricity of the wall-beam system. The developed examples considered linear elastic behavior for the materials and evaluated the efforts and vertical displacements in the support beams, plus tensions at the base of walls, to panels with different types of opening, supported by reinforced concrete beam with one span. Among the obtained results, it is emphasized that cracking between masonry and support beam resulted in significant increases in normal compressive stresses occurring at the ends of the walls as well as decreasing of the horizontal tension forces in the support beam. About the effects of the eccentricity, it was found that the consideration of the torsion strongly influences the dimensioning of the beam.