경량화 설계 및 자유로운 성형이 가능하고 유사연성의 장점을 가지는 직물보강 콘크리트는 철근콘크리트의 대체재로 큰 기대를 모으고 있다. 본 연구에서는 탄소 직물을 보강한 콘크리트 복합체 (TRC) 패널의 휨 특성을 살펴보고, 탄소 직물의 배치 위치 변수에 따른 차이를 살펴보기 위해 TRC 시험체를 제작하고 4점 재하 휨실험을 수행하였다. 또한, 일반 철근콘크리트 개념을 바탕으로 시험체의 휨 거동을 수치계산 결과와 실험결과를 비교하였다. 실험 결과, 콘크리트 매트릭스에서 탄소 직물간 의 부착파괴로 인해 TRC 패널의 큰 휨강도 감소와 내하력 감소가 나타났고, 탄소 직물을 시험체 하부로 편심 배치한 경우 휨 성능의 감소를 다소 줄일 수 있었다. TRC 패널의 수치계산 결과, 초기 거동에서는 휨실험 결과와 유사한 거동을 나타내었지만, 두 번째 균열의 발생 이후부터는 부착파괴의 발생으로 거동의 큰 차이를 나타내었다.

The paper presents an experimental evaluation of RC columns retrofitted by TRC(Textile fabric Reinforced Concrete). TRC were made using textile fabric fiber and self leveling mortar. A total of three specimens was constructed and was performed cyclic loading test. One specimen was a non-retrofitted column, while others were retrofitted with textile fabric and sheet type fiber. By comparing with non-retrofitted specimen, the maximum strength and ductility of retrofitted RC column was improved compared to non-retrofitted RC column.

Numerical analysis was performed to predict for deflection of reinforced concrete (RC) beams in flexure strengthened with textile reinforced concrete (TRC) in this study. TRC is new reinforcing material to strengthen for deteriorated RC structures. TRC consists of fiber reinforced polymer (FRP) reinforcement of textile form and concrete using fine aggregate. This paper presents both results and process of nonlinear analysis method for experimental results published in 2015 by Jung et al. Nonlinear analysis method proposed by Cho et al. was used to predict the displacement at the cross-section of mid-span for RC beams in flexure strengthened with TRC. At the three states of the RC beams such as occurrence of initial flexural crack in tensile concrete, the yield of tensile rebar, and ultimate in accordance with debonding of TRM. Displacements of beams were calculated at the three state and load-displacement curves by predicting results were compared to the collected test results. As a result, nonlinear analysis method accurately predicted the deflection of RC beams strengthened with TRC.

Numerical analysis was performed to predict for deflection of reinforced concrete (RC) beams in flexure strengthened with textile reinforced concrete (TRC) in this study. TRC is new reinforcing material to strengthen for deteriorated RC structures. TRC consists of fiber reinforced polymer (FRP) reinforcement of textile form and concrete using fine aggregate. This paper presents both results and process of nonlinear analysis method for experimental results published in 2015 by Jung et al. Nonlinear analysis method proposed by Cho et al. was used to predict the displacement at the cross-section of mid-span for RC beams in flexure strengthened with TRC. At the three states of the RC beams such as occurrence of initial flexural crack in tensile concrete, the yield of tensile rebar, and ultimate in accordance with debonding of TRM. Displacements of beams were calculated at the three state and load-displacement curves by predicting results were compared to the collected test results. As a result, nonlinear analysis method accurately predicted the deflection of RC beams strengthened with TRC.