Authors : K.R. Bindhu and K.P. Jaya
Abstract: The main objective of this study is to investigate the effect of cross inclined bars at the joint as confining reinforcement on the behaviour of exterior reinforced concrete beam-to-column connections subjected to earthquake loading. The joint with transverse reinforcement, detailed, as per general RC construction code of practice in India, (non-seismic joints) is unsatisfactory for performance under seismic loading. In this study, an attempt has been made to improve the confinement of core concrete without congestion of reinforcement in joints. Four exterior beam-column joint sub assemblages were tested under reverse cyclic loading applied at beam end. The specimens were sorted into 2 groups based on the joint reinforcement detailing. Group-A comprises of 2 joint assemblages with joint detailing as per ductile detailing code in India (IS 13920:1993) with 2 axial load cases and Group-B comprises of 2 specimens with cross inclined bars as confining reinforcements for the joints detailed as per IS 13920 with 2 axial load cases same as that of in first group. All the test specimens were designed to satisfy the strong column-weak beam concept and with adequate shear strength. The test results indicate that cross-inclined bars as confining reinforcement improve the seismic performance. The performance of the sub assemblages were compared with the analytical model developed using finite element software package ANSYS.
K.R. Bindhu and K.P. Jaya , 2008. Performance of Exterior Beam Column Joints with Cross-Inclined Bars under Seismic Type Loading. Journal of Engineering and Applied Sciences, 3: 591-597.