경량콘크리트 및 GFRP 보강근의 종류에 따른 부착 특성
- Alternative Title
- Bond Characteristic of Lightweight Concrete and GFRP Bars by Types
- Abstract
- In this study, two kinds of lightweight concrete (all-lightweight concrete and sand-lightweight concrete) and two kinds of GFRP bars (GFRP bar with spiral shape on the reinforcing bar surface and sand blasted GFRP bar reinforced with sand on it) were used in order to investigate the bond properties between them. We fabricated a series of bond strength specimens and measured the bond strength, and also investigated the results of other researchers. The conclusions obtained through the comparative analysis of the obtained data are as follows.
(1) In case of using deformed GFRP bar or sand coated GFRP bar embedded in normal concrete, there is almost no difference in the bond strength depending on the kind of the GFRP bars and it is about 70% of that of steel rebar in the normal concrete.
(2) The bond strength of deformed GFRP bar and sand coated GFRP bar in sand-lightweight concrete were 62% and 86%, respectively, compared to bond strength of steel rebar in normal concrete.
(3) The use of sand-coated GFRP bar in all-lightweight concrete or sand-lightweight concretes results in an increase in bond strengths of about 1.4 to 1.6 times greater than that of the use of deformed GFRP bar in all-lightweight concrete or sand-lightweight concretes .
(4) When the deformed GFRP bars are used in normal concrete, all-lightweight concrete, and sand-lightweight concrete, the normalized bond strengths are summarized in the order of normal concrete, sand-lightweight concrete, and all-lightweight concrete. Therefore, it can be regarded as a general criterion that normal concrete is higher in bond strength than lightweight concrete
(5) When sand-coated GFRP bars are used in normal concrete, all-lightweight concrete and sand-lightweight concrete, the normalized bond strengths are sorted in order of sand-lightweight concrete, all-lightweight concrete, and normal concrete. Therefore, it is concluded that it is contrary to general judgment criteria and it is necessary to investigate further the bond characteristics between lightweight concrete and sand coated GFRP bars
- Issued Date
- 2018
- Awarded Date
- 2018. 8
- Type
- Dissertation
- Publisher
- 부경대학교
- Affiliation
- 부경대학교 대학원
- Department
- 대학원 토목공학과
- Advisor
- 장희석
- Table Of Contents
- 목 차
표목차 iii
그림목차 iv
Abstract v
제1장 서론 1
1.1 연구목적 1
1.2 연구범위 2
제2장 보통콘크리트와 철근사이의 부착강도 3
2.1 실험체 제작 3
2.2 부착강도 측정실험 5
2.3 실험결과 및 문헌조사 결과 9
제3장 경량콘크리트와 이형 GFRP 보강근의 부착강도 10
3.1 실험체 제작 10
3.2 부착강도 측정실험 13
3.3 실험결과 및 문헌조사 결과 17
제4장 전경량콘크리트와 모래분사형 GFRP 보강근의 부착강도 19
4.1 실험체 제작 19
4.2 부착강도 측정실험 20
4.3 실험결과 및 문헌조사 결과 27
제5장 경량콘크리트와 이형 GFRP 보강근의 부착강도 29
5.1 실험체 제작 29
5.2 부착강도 측정실험 30
5.3 실험결과 및 분석 34
제6장 결과분석 35
6.1 부착강도의 정리 35
6.2 보통콘크리트에 이형 GFRP 보강근 및 모래분사형 GFRP 보강근을
사용한 실험체의 부착강도 36
6.3 전경량콘크리트에 이형 GFRP 보강근 및 모래분사형 GFRP 보강근을
사용한 실험체의 부착강도 36
6.4 모래경량콘크리트에 이형 GFRP 보강근 및 모래분사형 GFRP 보강근을
사용한 실험체의 부착강도 37
6.5 콘크리트 종류에 따른 이형 GFRP 보강근 및 모래분사형 GFRP 보강근을
사용한 실험체의 부착강도 38
제7장 결론 39
참고문헌 41
감사의 글
표 목차
Table 1 Specimen details 3
Table 2 Result of this experiment (normal concrete and steel rebar) 8
Table 3 Bond strength between normal concrete and steel rebar 9
Table 4 Specimen details 11
Table 5 Physical properties of lightweight aggregates 11
Table 6 Mechanical properties of GFRP bars 11
Table 7 Result of this experiment
(lightweight concrete and deformed GFRP bar) 16
Table 8 Bond strength between lightweight concrete
and deformed GFRP bar 17
Table 9 Bond strength between normal concrete
and deformed GFRP bar 18
Table 10 Specimen details 19
Table 11 Result of this experiment 26
Table 12 Bond strengths between lightweight concrete
and sand coated GFRP bar 27
Table 13 Bond strengths between normal concrete
and sand coated GFRP bar 28
Table 14 Specimen details 29
Table 15 Result of this experiment (deformed GFRP bar
and sand coated GFRP bar in sand lightweight concrete) 33
Table 16 Bond strengths of deformed GFRP bar
and sand coated GFRP bar in sand lightweight concrete 34
Table 17 Normalized Bond strengths and relative
ratios of the specimens. 35
그림 목차
Fig. 1 Specimen dimension (unit: mm) 4
Fig. 2 Specimen setup dimension (unit: mm) 4
Fig. 3 Test setup 6
Fig. 4 Failure type of specimen NS13-1 6
Fig. 5 Bond stress and slip curves of specimen NS13-1, 2 7
Fig. 6 Figure of GFRP bars 12
Fig. 7 Failure type of specimens LG13-4∼8 13
Fig. 8 Bond stress-slip curves of specimens LG13-1∼8 15
Fig. 9 Failure type of specimen L-SCG13-3 20
Fig. 10 Failure type of specimens SCG-1∼5 22
Fig. 11 Failure type of specimens SCG-6∼8 23
Fig. 12 Failure type of specimens N-SCG13-1∼3 24
Fig. 13 Bond stress-slip curves 25
Fig. 14 Failure type of specimens SLG-1∼8 30
Fig. 15 Failure type of specimens SLSCG-1∼3 31
Fig. 16 Bond stress-slip curves of specimens SLG-1∼10 31
Fig. 17 Bond stress-slip curves of specimens SLSCG-1∼3 32
- Degree
- Master
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