Estudo comparativo da influência da rigidez da ligação na viga no modelo de pórtico espacial e pórtico plano em uma estrutura de concreto armado in-loco

Abstract

The structural analyses of reinforced concrete buildings often consider beam-column connections as rigid. However, studies have shown that relevant rotations in beam-column connections indicate a partial transmission of bending moment. As a result, the forces and deformations in a structure differ from the considerations made during the structural analysis because there is a redistribution of forces and displacements when the real behavior of connections in the building is taken into account. The change in the stiffness of the nodes alters how the structure behaves, affecting horizontal displacement values and also second-order results, thus changing the sizing of structural elements relevant to the construction. In this way, a better understanding of the influence of beam-column connection stiffness on structural behavior is expected to contribute to designs that are closer to real-life conditions. These considerations can ensure greater safety and cost-effectiveness in reinforced concrete structural projects. Furthermore, the safe use of available computational resources requires a deeper overall understanding of software that can mathematically and physically influence structural behavior by modifying the stiffness of beam-column connections.