Assessment of Influence of Reinforcement Detailing on Blast Resistance of Reinforced Concrete Beam-column Connections

Abstract

This study investigates the influence of blast loading on Reinforced Concrete (RC) beam-column connections, which are critical components for maintaining the structural integrity of buildings during extreme events like explosions. The impact of varying blast loads, detonation distance, and reinforcement detailing on the extent of damage in the RC frame and connections is analyzed using ABAQUS/CAE Finite Element Method (FEM) software. Joint rotation is used as a damage indicator to assess the damage level in the structure. The study evaluates the effect of reinforcement detailing on the blast damage resistance of the RC frame and connections and proposes recommendations for reducing damage in the connections through the effective placement of steel reinforcement. The effectiveness of different configurations of reinforcing steel bars is also analyzed, and the presence of shear and diagonal reinforcements is found to reduce joint damage by 3-4 times. This study highlights the significance of reinforcement detailing and recommends its careful consideration in the design of blast-resistant structures.

Keywords

• beam-column connection
• blast resistance
• damage
• reinforcement detailing