스트랜드 간격이 좁은 그리드 타입 CFRP 인장보강재 적용 슬래브의 단면 높이 및 스트랜드 간격에 따른 휨거동 평가
Flexural behavior of slabs reinforced by grid-type CFRP reinforcement with the narrow spacing of strands with different section height and strand spacing
Grid-type FRP reinforcement has been used as reinforcement for cement composites instead of rebars mainly in offshore structures due to its corrosion-resistant properties. Recently, the structural application of grid-type FRP reinforcement has been expanded in order to reduce the weight of members and to improve eco-friendliness of the reinforced concrete (RC) structure. This paper experimentally investigated the effective depth of the section and the spacing of strands in the weft and warp direction on the flexural behavior of textile reinforced concrete (TRC) slabs applied the biaxial warp knitting structure grid-type CFRP reinforcement (hereafter referred to as carbon grid) with the narrow spacing of strands. As a result, it was found that the maximum load increased and the deflection at peak decreased as the effective depth increased. In addition, when the strand spacing was narrow, the load was gradually reduced as the load was transferred to the carbon grid after the peak. On the other hand, compared with the RC specimens, the stiffness of the TRC specimens was sharply lowered due to cracks, resulting in greater deflection at the same load. Although the maximum loads of the TRC specimens were larger than those of the RC specimens, the TRC specimens exhibited brittle behavior due to strand fracture after the peak. In this paper, based on the experimental results, the load-deflection relationship of the TRC structure was modeled as a bilinear curve in which the stiffness changes around the crack initiation point, and to calculate the stiffness after crack initiation, an equation that applied a reduction factor to the cracked transformed moment of inertia was proposed. The stiffness after cracking according to the proposed formula was larger than that to the experimental results, but the overall load-deflection relationship was shown to be able to be simulated.
목차
Abstract 1. 서론 1.1 연구배경 1.2 연구목표 2. 실험 개요 2.1 실험체 개요 2.2 재료 특성 2.3 가력 및 계측 방법 3. 실험 결과 및 고찰 3.1 손상 및 파괴 형상 3.2 하중-처짐 관계 3.3 하중-탄소그리드 변형률 관계 3.4 균열 단면 강성 4. 결론 REFERENCES
대한건축학회지회연합회 [The Regional Association of Architectural Institute of Korea]
설립연도
2000
분야
공학>건축공학
소개
본회는 건축에 관한 학술․ 예술․ 기술을 연구 연마하는 지회회원들의 입지향상과 회원상호간의 친목도모와 함께 건축 문화창달에 기여함을 목적으로 한다.
목적을 달성하기 위하여 다음의 사업을 한다.
1. 지회회원의 입지향상과 친목도모
2. 건축에 관한 조사․연구지도 및 이에 관련된 사업
3. 회지, 논문집, 연구보고서 기타 건축에 관한 도서의 간행
4. 건축에 관한 강습회․강연회․간담회․전람회․견학회 등의 개최
5. 건축에 관한 계획, 감독, 기술검토에 대한 국가공공기관 기타의뢰에 관한 사항
6. 국내외 관계 제 학회와의 교류 및 회의참석
7. 기타 본회 목적달성에 필요한 사업
간행물
간행물명
대한건축학회연합논문집 [Journal of the Regional Association of Architectural Institute of Korea]