A New Model for Failure Mode of Reinforced Concrete Interior Beam Column Joints under Seismic Loading

The study presented in this paper develops a statistical model which could predict the failure mode of an RC interior beam-column connection under seismic load. A database has been compiled by assembling the details of 150 test specimens loaded to failure under quasi-static cyclic loading, selected from past research. Multinomial logistic regression was employed to develop the model to predict the joint response with three possible outcomes such as shear failure, beam failure and beam-joint failure. Performance analysis of six interior connection specimens, designed to be seismic-resistant with varying aspect ratios, concrete compressive strength, and beam bar yield strength, has validated the statistical model.