Numerical investigation of the effect of materials on intensified shear and moment in IPE steel beams with reduced beam section

Abstract

Looking at the structures damaged by the force of the earthquake in the past years around the world, it has been observed that the most failed part of the structures is the panel zone or beam-to-column connection. Therefore, strengthening the panel zone is very important. One of the connections that can be used in steel structures is the beam connection with a reduced section or (RBS connection). In the RBS connection, by weakening the flange near the connection, excessive force and moment to the connection are prevented, and the plastic hinge is formed outside the connection.  In this research, numerical tests were performed on three IPE beam and column samples with different sections that were connected in the panel zone. The analysis was nonlinear static. For each model, intensified shear based on the results of ABAQUS was compared with the anchor, and intensified moment and shear was compared to the code of design and implementation of steel buildings (10th topic of the National Building Regulations). After comparing the moment and shear parameters It was observed that the regulation parameters were always higher compared to the analytical parameters, and in all the models, the highest stress occurred in the reduced area of the beam, and as we moved away from the place of the plastic hinge of the beam, the stresses decreased to a minimum, and the resistance of the panel zone was increased by increasing the size of the beam and columns.