Journal of Korean Association for Spatial Structures (한국공간구조학회논문집)

Korean Association for Spatial Structures (한국공간구조학회)
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Experimental Performance Evaluation of RC Beams Strengthened by TRM with Improved Bond Capacity

부착성능이 개선된 TRM 보강 RC 보의 실험적 성능평가

  • 전인근 (해밀이앤씨 (주)해밀EnC 부설연구소) ;
  • 김승직 (계명대학교 건축공학전공)
  • Received : 2023.12.12
  • Accepted : 2023.12.14
  • Published : 2024.03.15
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Abstract

The paper presents the experimental investigation of RC beams retrofitted with Textile Reinforced Mortar (TRM), featuring enhanced bond capacity. Anchoring systems, including an extension of retrofitting length and the use of chemical anchors, are newly employed to improve the structural performance of the RC beam retrofitted with TRM. For the experimental investigation, a total of seven shear-critical RC beams, with and without stirrups, were designed and constructed. The structural behaviors of specimens retrofitted with the proposed TRM methods were compared to those of non-retrofitted specimens or specimens strengthened with conventional TRM methods. Crack pattern, force-displacement relationship, and absorbed energy were evaluated for each specimen. The experimental results indicate a significant improvement in the shear capacity of the RC beam with the proposed retrofitting method. Therefore, it is concluded that the application of an extended retrofitting length and chemical anchors to the TRM retrofitting method can effectively enhance the bond capacity of TRM, thereby improving the shear performance of RC beams.

Keywords

Acknowledgement

본 연구는 2023년도 국토교통과학기술진흥원에서 국토교통기술촉진연구사업(RS-2021-KA161540)의 지원으로 수행되었습니다.

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