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Title |
Evaluation of Structural Behavior of Reinforced Concrete Exterior Beam-Column Joints with High-Strength Concrete
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Authors |
이범식(Bum-Sik Lee) ; 김경덕(Kyung-Duk, Kim) ; 김상우(Sang-Woo Kim) ; 김길희(Kil-Hee Kim) ; 이정윤(Jung-Yoon Lee) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2014.18.6.072 |
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Keywords |
고강도 콘크리트 ; 보-기둥 접합부 ; 파괴모드 ; 전단강도 ; 확대머리철근 High-strength concrete ; Beam-column joint ; Failure mode ; Shear strength ; Headed bar |
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Abstract |
This paper reports the test results of reinforced concrete exterior beam-column joints with high-strength concrete. The main parameters of eight specimens were joint failure modes, the compressive strength of concrete, and the head shapes of steel bars. All specimens were designed according to ACI 352R-02 design recommendations. Two types of failure modes were considered; J-failure and BJ-failure. The longitudinal steel bars were anchored by 90 degree standard hooks or headed reinforcement. Experimental results indicated that the current ACI design recommendation limited by the compressive strength of concrete somewhat underestimated the strength of beam-column joints with high-strength concrete. In the specimens showed joint shear failure, the strength of beam-column joints with headed bars was approximately 10 percent higher than that of joints with 90 degree standard hooks.
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