Simplified empirical model for shear strength of RC beam–column joints

Abstract

In this study, a simplified empirical model is proposed to estimate the shear strength of reinforced concrete beam–column joint. For development of proposed model, various governing parameters affecting the joint shear strength have been identified and evaluated. The identified parameters, namely, concrete compressive strength, width of beam and column, depth of beam and column, column axial load, longitudinal reinforcement of beam and column, yield strength of reinforcement, and joint shear reinforcement, are considered. The influence of aforementioned parameters is determined from the statistical evaluation of collected 326 experimental results of interior and exterior beam–column joints from the literature. The database consists of specimens with wide range of above-mentioned parameters. Proposed model is suitable for the beam–column joints reinforced with vertical, horizontal and diagonal (X-cross) type of reinforcement. Based on experimental database, the efficacy of proposed model is compared with various joint shear strength models. Comparison shows that proposed model predicts more accurate joint shear strength than other considered models. The proposed model is simple in use and can be used for the design purpose.