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Title |
Experimental Study on Shear Behavior of Reinforced Concrete Deep Beams with Indirect Loading
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Authors |
김상우(Sang-Woo Kim) ; 이선호(Sunho Lee) ; 최연제(Yeonje Choi) ; 이정윤(Jung-Yoon Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.6.61 |
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Keywords |
깊은보; 전단거동; 간접하중; 철근콘크리트 Deep beam; Shear behavior; Indirect loading; Reinforced concrete |
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Abstract |
This paper presents experimental results on the reduction of shear strength in reinforced concrete deep beams subjected to indirect loads from supported beams. The primary experimental variables are the load transfer path and the location of the load-transfer beam. The load transfer path is categorized into direct and indirect loads. The specimens subjected to indirect loads consist of a reinforced concrete deep beam and load-transfer beams that are supported and perpendicular to it. The location of the load-transfer beams is categorized into upper and lower positions of the deep beam. The specimen with load-transfer beams positioned at the bottom was designed to include hanger reinforcement for shear strengthening, aiming to evaluate the effect of the hanger reinforcement. The shear span-to-depth ratio of the supporting beam for all specimens was uniformly 0.7. The experimental results showed that the shear strength of specimens subjected to indirect loads was significantly decreased compared to those subjected to direct loads, with the reduction in shear strength increasing as the position of the load-transfer beam moved lower. Additionally, the position of the load-transfer beams was found to affect the distribution and magnitude of the concrete compression strut as well as the strain in the tension reinforcement.
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