DefinePK

Abstract

This study aims at investigating the nonlinear behavior of adequate reinforced concrete frames with semi-rigid connections under high lateral load and comparing them to the moment resisting systems. These two systems were compared based on their energy dissipation capacity, inter-storey drift ratio, force distribution, ductility, failure mechanism, and self-centering capacity. Also, this study aims at evaluating important parameters for the Reinforced concrete building with semi rigid connections such as over-strength factor, ductility, and response modification factor and compare them with that of moment resisting system. A complete three-dimensional finite element model for the RC connections is developed using ANSYS finite element software to determine the moment rotation curve for the connections based on their size, concrete strength and reinforcement details. SAP2000 finite element analysis model is performed to investigate the impact of semi rigid connections on the nonlinear behavior of RC buildings. The seismic force and displacement demand on the proposed system are determined using nonlinear time history analysis. Moreover, the maximum displacement that the building can withstand is determined using pushover analysis. The study concluded that considering RC beam-column joint as a rigid connection, will significantly overestimate the stiffness of RC buildings and will give erroneous structural responses under earthquake loading.