Numerical Investigation on Seismic Strengthening of Composite Two Way Beam- Column Joint

Beam-column joints are crucial structural components to ensure the overall stability of composite framed structures subjected to seismic loads. Many more research efforts have been dedicated to enhance the seismic behavior of beam-column joints. Due to limited research on composite beam-column joint, the effect of some parameters is not well documented on the current building codes. A total of eleven specimens including a control specimen were simulated by considering the effects of doubler plate thickness, haunch plate thickness and haunch configuration in a numerical research conducted using ABAQUS/Standard to investigate the performance of composite steel beam column joint under cyclic loading. Experimental results from other researchers validated the accuracy of the numerical model. Finite-element analysis results showed use of higher thickness doubler plate with better haunch thickness increased the load carrying capacity by 45.02% and 34.02% respectively. Moreover, using appropriate haunch configuration along the flange and beam column with haunch support improved the load carrying capacity and seismic resistance of the joint. With use of higher doubler plate and haunch thickness the stiffness and energy dissipation capacity of the joint showed improved result. These results verified that the composite beam column joint with the aid of doubler plate thickness, haunch plate thickness, better haunch configuration and supporting the joint with haunch helps the beam column joint to withstand the seismic action better.