Experimental assessment shows improved energy dissipation and bearing capacity in precast concrete joints, indicating enhanced seismic resilience.
To improve the quality of precast components and reduce embedding costs, this paper proposes a novel precast concrete beam-column joint. The joint adopts an H-section steel segment to connect the embedded anchor plates at the beam end and the column side. Two specimens (labeled SD and CD) are designed: SD’s damage was controlled within the steel connector, while CD’s damage was limited to the reinforced concrete beam. Low-cycle loading tests were carried out to study the seismic performance (including failure modes) of the proposed joints. Additionally, a cast-in-situ concrete joint specimen (RC) was fabricated and tested for comparison. Test results indicate that SD has better energy dissipation capacity than CD. Compared with RC, the bearing capacity of SD and CD increases by 35.1% and 47.6% respectively, and their ductility coefficient nearly doubles compared with RC. For this novel beam-column joint, the damage location is controlled by the ratio of the ultimate flexural capacity of the H-section steel segment to that of the reinforced concrete beam.
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Hu et al. (2025) studied this question.
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