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Title |
Flexural Experiments on Reinforced Concrete Beams Strengthened with ECC and High Strength Rebar
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Keywords |
ECC ; 고장력 철근 ; 휨 실험 ; 균열 제어 ; 보강 공법 ECC ; high strength rebar ; flexural performance ; crack control ; reinforcement method |
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Abstract |
ECC is a micro-mechanically designed cementitious composite which exhibits tightly controlled crack width and strain hardening behavior in uniaxial tension while using a moderate amount of reinforcing fiber, typically less than 2% fiber volume fraction. Recently, a variety of applications of this material ranging from repair and retrofit of structures, cast-in-place structures, to precast structural elements requiring high ductility are developed. In the present study, a retrofitting method using ECC reinforced with high strength rebar was proposed to enhance load-carrying capacity and crack control performance of deteriorated reinforced concrete (RC) beams. Six beam specimens were designed and tested under a four-point loading setup. The flexural test revealed that load-carrying capacity and crack control performance were significantly enhanced by the use of ECC and high strength rebar. This result will be useful for practical field applications of the proposed retrofitting method.
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