소형 결손부를 가지는 휨지배 RC 벽체의 횡력저항성능 및 보강방안

다국어 초록 (Multilingual Abstract)

This study aimed to determine the effects of small defects on the structural performance and reinforcement method of reinforced-concrete (RC) structural walls. For this purpose, a cyclic lateral loading test was performed on five reinforced concrete walls with an aspect ratio of 2.6 and small defects. The size of small defects was taken as the major test parameter. The specimens were designed to fail with flexural behavior, corresponding to the failure pattern of slender RC walls. Based on the test results, the structural performances and behavioral characteristics of the test specimens were investigated in terms of load-carrying capacity_(flexural strength), hysteretic behavior, strain distribution, and the size of defects. The test results show that the specimens undergo flexural failure irrespective of the size of the defects, and the main performance_parameters, such as flexural strength and deformation capacity, were not affected by the small defects. It could thus be concluded that small defects do not affect the flexural behavior of slender walls if the walls have sufficient shear performance, and the small defects are located in the compression zone where compressive stress does not decrease. Based on the characteristics of the structural wall, the experimental results and the analysis results, propose a reinforcement method according to the size of the defects. By applying this reinforcement method, it is possible to secure the structural safety of the RC structural wall in which the defects exist, and it can be reasonably expected that the economical efficiency and construction of the RC structural wall construction can be secured.

목차 (Table of Contents)

• Ⅰ. 서 론 1
• 1.1 연구의 배경 및 목적 1
• 1.2 연구범위 및 방법 2
• Ⅱ. 고층 공동주택 아파트의 구조적 특성 및 결손부 유형 분석 5
• 2.1 고층 공동주택 아파트 구조벽체 분석 5
• 2.1.1 고층 공동주택 아파트 구조벽체의 압축력 및 파괴모드 분석 8
• 2.2 고층 공동주택 아파트 구조벽체의 결손부 유형 분석 11
• Ⅲ. 벽체 개구부 철근보강에 관한 국내 구조기준 분석 13
• Ⅳ. 실험체 설계 및 실험계획 14
• 4.1 실험체 설계 14
• 4.2 실험계획 24
• 4.2.1 철근 변형률 계측 계획 24
• 4.2.2 LVDT 계측 계획 29
• 4.2.3 실험체 셋업 및 가력 계획 30
• 4.2.4 하중 계획 32
• Ⅴ. 실험결과 및 분석 34
• 5.1 실험결과 34
• 5.1.1 재료실험 결과 34
• 5.1.2 하중-변위비 관계 36
• 5.1.3 철근 변형률 43
• 5.2 실험결과 분석 51
• 5.2.1 실험체 균열 및 파괴특성 51
• 5.2.2 압축대 내에서의 결손부 위치에 따른 강도분석 62
• Ⅵ. 소형결손부를 가지는 휨지배 구조벽체의 보강방안 상세제안 67
• 6.1 RC 구조벽체 결손부와 개구부 67
• 6.2 RC 구조벽체 결손부 보강방안 68
• 6.2.1 결손부 크기에 따른 보강방안 68
• 6.2.2 결손부에 의해 철근절단이 발생한 경우 보강방안 72
• Ⅶ. 결 론 74
• 참고문헌 77