Experimental Study on Beam Column Joints by Using Steel Fiber Reinforcement for Cyclic Looading

This paper describes the experimental results of ten steel fibre reinforced high performance concrete (SFRHPC) exterior beam-column joints under cyclic loading. The M30, grade concrete used. Volume fraction of the fibres used in this study varied from 0 to 1% with an increment of 0.25%. Joints were tested under positive cyclic loading, and the results were evaluated with respect to strength, ductility and stiffness degradation. Test results indicate that the provision of SFRHPC in beam-column joints enhances the strength, ductility and stiffness, and is one of the possible alternative solutions for reducing the congestion of transverse reinforcement in beam column joints. Also, an attempt has been made to compare the shear strengths of beam-column joints obtained by using the models. As these models are meant for the joints in ordinary concrete, comparison was not found to be satisfactory. The moderoposed by co-workers was modified to account for the presence of high performance concrete. The proposed model was found to compare satisfactorily with the test results.