Experimental Study On Beam Column Joint Behavior Under Cyclic Loading

Abstract

Beam Column Joints Are Critical Zones In Reinforced Concrete (RC) Framed Structures That Significantly Influence Seismic Performance. Under Earthquake Induced Cyclic Loading, Joints Are Subjected To Complex Stress States Including Shear, Bending, And Bond Stresses, Leading To Stiffness Degradation, Energy Dissipation, And Eventual Failure. This Experimental Study Investigates The Behavior Of RC Beam Column Joints Under Reversed Cyclic Loading. A Total Of Three Specimens With Varying Reinforcement Detailing Were Tested Under Controlled Laboratory Conditions. Key Parameters Such As Load Displacement Response, Stiffness Degradation, Energy Dissipation, Ductility, Crack Patterns, And Failure Modes Were Evaluated. Results Show That Joint Detailing Substantially Affects Seismic Performance, And Strengthened Joints With Adequate Confinement Exhibit Higher Ductility And Energy Absorption Capacity. The Findings Provide Insights For Improved Seismic Design And Retrofitting Strategies.

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