Experimental Assessment of Bond Behavior and Structural Performance of High-Strength Concrete Beam-Column Joints under Static Load

Abstract - This study explores the bond characteristics and structural behavior of reinforced concrete (RC) beam-column joints constructed with High Performance Concrete under static loading conditions. Beam-column joints are critical structural elements whose failure can compromise the entire frame integrity, especially during seismic events. Twelve specimens, including L- and T-shaped configurations with M30 and M60 concrete grades, were fabricated and assessed. The investigation focused on reinforcement detailing, development length provisions, and HPC’s influence on load-displacement responses. Findings demonstrate that HPC enhances joint strength, reduces deflections, and improves ductility compared to conventional concrete. Particularly, T-section joints with M60 HPC achieved superior load capacity and lower deflections. Incorporating development length in L-section joints raised strength and decreased deflections by over 20%. Numerical simulations using ANSYS closely matched experimental data, confirming the reliability of the computational model. These results support the use of HPC in beam-column joints for improved performance in high-rise and earthquake-resilient structures. Key Words: High Performance Concrete, beam column joint, static loading, reinforcement detailing, ANSYS simulation.