한국구조물진단유지관리공학회 논문집 (Journal of the Korea institute for structural maintenance and inspection)

  • 제26권4호
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  • Pages.40-47
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  • 2022
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  • 2234-6937(pISSN)
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  • 2287-6979(eISSN)
한국구조물진단유지관리공학회 (Korea Institute for Structural Maintenance Inspection)
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축소 철근콘크리트 벽체의 내력과 균열진전에 대한 개구부모서리 균열제어 띠의 영향

Effect of Crack Control Strips at Opening Corners on the Strength and Crack Propagation of Downsized Reinforced Concrete Walls

  • 왕혜린 (경기대학교 일반대학원 건축공학과) ;
  • 양근혁 (경기대학교 스마트시티공학부 건축공학전공)
  • 투고 : 2022.06.30
  • 심사 : 2022.08.29
  • 발행 : 2022.08.30
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초록

이 연구의 목적은 철근콘크리트 벽체의 내력, 변형 및 균열진전에 대한 개구부 모서리의 사인장 균열 제어를 위한 다양한 보강방법들이 효율성을 평가하는 것이다. 개구부 모서리의 사인장 균열제어 보강방법으로서 이 연구에서 제안한 균열제어 띠, 기존의 경사보강근 배근방법, 그리고 응력분산곡면판을 선택하였다. 균열제어 띠에서는 균열치유 기능성이 부여된 것도 함께 고려하였다. 개구부 주위의 체적변화 및 균열 폭 진전을 평가하기 위하여 개구부 모서리에서 사인장 균열 유도를 위한 축소 벽체 실험을 수행하였다. 실험결과 균열제어 띠는 경사보강근 및 응력분산곡면판에 비해 개구부 주위의 체적변화 감소 및 개구부 모서리 균열 폭 제어에 효율적이었다. 균열 치유 기능이 포함된 균열제어 띠는 사전 실험에서 발생한 균열들을 치유하면서 축소 벽체의 내력 향상 및 균열 폭 감소에 가장 좋은 성능을 보였다.

The present study aimed to examine the effectiveness of different techniques for controlling the diagonal cracks at the corners of openings on the strength, deformation, and crack propagation in reinforced concrete walls. The crack control strip proposed in this study, the conventional diagonal steel reinforcing bars, and stress-dispersion curved plates were investigated for controlling the diagonal cracks at the opening corners. An additional crack self-healing function was also considered for the crack control strip. To evaluate the volume change ratio and crack width propagation around the opening, downsized wall specimens with a opening were tested under the diagonal shear force at the opening corner. Test result showed that the proposed crack control strip was more effective in reducing the volume change and controlling the crack width around the opening when compared to the conventional previous methods. The crack control strip with crack healing feature displayed the superior performance in improving the strength of the wall and reducing the crack width while healing cracks occurred in the previous tests.

키워드

과제정보

본 연구는 2020년도 중소벤처기업부의 기술개발사업 지원에 의한 연구(과제번호:S3035523)이며, 2022학년도 경기대학교 대학원 연구원장학생 장학금 지원에 의하여 수행된 연구임.

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