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Title |
Failure Behavior of Reinforced Concrete Bridge Piers with Longitudinal Rebars Lap-spliced Using U-shaped Hooks
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DOI |
https://doi.org/10.11112/jksmi.2026.30.1.18 |
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Keywords |
겹침이음; 파괴거동; U형 갈고리; 축방향철근비; 교량 교각 lap splice; failure behavior; U-shaped hook; longitudinal reinforcement ratio; bridge pier |
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Abstract |
The objective of this study is to evaluate the failure behavior and seismic performance of octagonal solid-section RC bridge piers and to analyze the influence of lap-spliced longitudinal reinforcement on their failure behavior. A lap-splice detail for longitudinal reinforcement with U-shaped hooks was developed, and the developed detail was applied to three test specimens. Four scaled octagonal solid-section column specimens were fabricated, and cyclic lateral loading tests were conducted under a constant axial load. All specimens were provided with a constant volumetric ratio of transverse spiral reinforcement of 0.592%, while the longitudinal reinforcement ratio ranged from 1.15% to 2.29%. According to the test results, all specimens ultimately failed in a flexural failure mode. The maximum lateral load capacities of the specimens with lap splices were 13∼26% higher than that of the specimen without lap splices, whereas the displacement ductility of the lap-spliced specimens was 25∼34% lower than that of the specimen without lap splices.
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