Flexural performance of NSC and SCC Beam Column Joint with Headed Bar subjected to Cyclic loading

Abstract

Designing beam-column joints with enhanced flexural performance is crucial for constructing earthquake-resistant buildings. Ductile detailing methods are recommended for strengthening these joints, but they often lead to reinforcement congestion that NSC cannot accommodate. Self-Consolidating Concrete (SCC) with added fibres offers a solution by improving joint performance while reducing reinforcement congestion. This study investigates beam-column joints reinforced with headed bars and subjected to cyclic loading. It explores the feasibility of using SCC and NSC in combination to optimize joint design. Experimental specimens undergo reverse cyclic loading to evaluate hysteresis behaviour, stiffness degradation, ductility displacement, and failure envelopes. Results highlight the benefits of SCC with fibres and headed bars in enhancing joint resilience under seismic conditions. The findings contribute to understanding the effectiveness of these reinforcement strategies in mitigating damage and improving structural performance in earthquake-prone regions.