[논문]Pullout Test of Headed Reinforcing Bar in RC or SFRC Members with Side-Face Blowout Failure

Lee, Chang-Yong; Kim, Seung-Hun; Lee, Yong-Taeg

doi:10.5659/aikar.2020.22.1.33

Pullout Test of Headed Reinforcing Bar in RC or SFRC Members with Side-Face Blowout Failure 원문보기

Architectural research, v.22 no.1, 2020년, pp.33 - 39

Lee, Chang-Yong (Department of Architecture Engineering, Hanbat National University) , Kim, Seung-Hun (Department of Architecture Engineering, Hanbat National University) , Lee, Yong-Taeg (Department of Architecture Engineering, Hanbat National University)

Abstract ▼ AI-Helper

In this study, side-face blowout failure strength of high strength headed reinforcing bar, which is vertically anchoring between RC or SFRC members, is evaluated throughout pullout test. The major test parameters are content ratio of high strength steel fibers, strength of rebar, length of anchorage, presence of shear reinforcement, and the side concrete cover thickness planned to be 1.3 times of the rebar. In pullout test, tensile force was applied to the headed reinforcing bar with the hinged supports positioned 1.5 and 0.7 times the anchorage length on both sides of the headed reinforcing bar. As a result, the cone-shaped crack occurred where the headed reinforcing bar embedded and finally side-face blowout failure caused by bearing pressure of the headed reinforcing bar. The tensile strength of specimens increased by 13.0 ~26.2% with shear reinforcement. The pullout strength of the specimens increased by 3.6 ~15.4% according to steel fiber reinforcement. Increasing the anchoring length and shear reinforcement were evaluated to reduce the stress bearing ration of the total stress.

주제어

표/그림 (11)

표 Table 1. Test matrix
그림 Figure 1. Detailed view of the specimens
그림 Figure 2. Test setup
표 Table 2. Test results of concrete materials
표 Table 3. Results of tensile test of headed reinforcing bar
그림 Figure 3. Typical specimen failures
표 Table 4. Test result
그림 Figure 4. Comparison of load-displacement curves
그림 Figure 5. Comparison of P_max
그림 Figure. 6 Bearing stress
표 Table 5. Comparison of Theoretical Strength and Experimental Strength

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

문제 정의

The purpose of this study was to investigate the detailed performance of mechanical anchorage of side fractured headed reinforcing bar in the vertical joint between RC members or SFRC members with high strength headed reinforcing bar. The test parameters are included content rate of steel fiber, strength of rebar, length of anchorage and presence of shear reinforcement.

제안 방법

A total of 10 specimens were produced as shown in Table 1 The experiment parameters include steel fiber mixing rate (NC: 0%, SC: SFRC 1%), design compressive strength of concrete (24: C24, 40: C40), strength of reinforcement (S5: SD500, S6: SD600), length of anchorage (H350: 270mm, H450: 370mm), shear reinforcement (C0: no-details, C1: D10@80). Figure.
In this study, a simplified test specimen was planned which the tensile force was applied directly to the headed reinforcing bar without making the horizontal member used as the main reinforcement at the connections between RC member and SFRC members, and the compressive e force was carried out at a point considering the effective depth.
In this study, pullout test was performed to evaluate the sideface blowout failure strength of high strength headed reinforcing bar used for mechanical anchorage between RC or SFRC members. The results are summarized as follows:
The calculation of the anchorage performance of the headed reinforcing bar is highly influenced by the materials used, types of components and joints, working stress, and detail of anchoring reinforcement. Thus, much research is needed.
The purpose of this study was to investigate the detailed performance of mechanical anchorage of side fractured headed reinforcing bar in the vertical joint between RC members or SFRC members with high strength headed reinforcing bar. The test parameters are included content rate of steel fiber, strength of rebar, length of anchorage and presence of shear reinforcement.

이론/모형

A cylindrical standard specimen of 100 x 200 mm was fabricated to test the concrete compressive strength (fck). Compressive strength test was performed using Universal Testing Machine (UTM) according to KS F 2405. The concrete compressive strength test was carried out after 28 days of casting, and the test results are shown in Table 2.

성능/효과

(2) Pullout strength with shear reinforcement of the C1 series specimens increased by 13.0 ~ 26.2% compared to the C0 series specimens. The SC series with steel fiber increased the pullout strength by 3.
(4) The result of the ratio of test strength to side-face blowout failure strength of Chun at al. was estimated to be 0.59 on average and 0.078 on the standard deviation. From this, it can be seen that the equation of Chun at al evaluated the actual side-face blowout failure as unstable.

참고문헌 (24)

ACI (2002). "Code requirements for nuclear safety related concrete structures." American Concrete Institute, ACI 352-02.
ACI (2007). "Code requirements for nuclear safety related concrete structures." American Concrete Institute, ACI349-07.
B. I. Bae, J. H. Chung, H. K. Choi, H. S. Jung, & C. S. Choi (2018). "Experimental study on the cyclic behavior of steel fiber reinforced high strength concrete columns and evaluation of shear strength." Engineering Structures, 157: 250-267.

상세보기
B. H. AbdelAleem, & A. A.A. Hassan (2019). "Effect of combining steel fibers with crumb rubber on enhancing the behavior of beam-column joints under cyclic loading." Engineering Structures, 182: 510-527.

상세보기
C. C. Hung, & C. Y. Chueh (2016). "Cyclic behavior of UHPFRC flexural members reinforced with high strength steel rebar." Engineering Structures, 122: 108-120.

상세보기
C. G. Berrocal, I. Lofgren, & K. Lundgren (2018). "The effect of fibres on steel bar corrosion and flexural behaviour of corroded RC beams." Engineering Structures, 163: 409-425.

상세보기
F. Delhomme, G. Debicki, & Z. Chaib (2010). "Experimental behaviour of anchor bolts under pullout and relaxation tests." Construction and Building Materials, 24: 266-274.

상세보기
H. J. Sim, S. C. Chun, & S. H. Choi (2016). "Anchorage strength of headed reinforcing bars in steel fiber-reinforced UHPC of 120 and 180 MPA." Journal of the Korea Concrete Institute, 28:365-373.

원문보기 상세보기
H. J. Sim, & S. C. Chun (2018). "A reevaluation of anchorage strength of headed reinforcing bars in exterior beam-column joints." Journal of the Korea Concrete Institute, 30: 207-216.

상세보기
J. Wang, J. Qi, T. Tong, Q. Xu, & H. Xiu (2019). "Static behavior of large stud shear connectors in steel-UHPC composite structures." Engineering Structures, 178: 534-542.

상세보기
KCI (2012). "Korean concrete structure Code." Korea Concrete Institute, KCI 2012.
KCI (2017). "KCI Model Code 2017." Korea Concrete Institute, KCI-M-18-006.
K. N. Chi, C. K. Chiu, & K. C. Lin (2018). "Study on straight development length of tensile threaded bars in high strength reinforced concrete members." Construction and Building Materials, 183: 661-674.

상세보기
L. Hou, B. Zhou, S. Guo, N. Zhuang, & D. Chen (2018). "Bondslip behavior between pre-corroded rebar and steel fiber reinforced concrete." Construction and Building Materials, 182: 637-645.

상세보기
M. Pourbaba, E. Asefi, H Sadaghian, & A. Mirmiran (2018). "Effect of age on the compressive strength of ultra-highperformance fiber-reinforced concrete." Construction and Building Materials, 175: 402-410.

상세보기
M. Toth, B. Bokor, & A. Sharma (2019). "Anchorage in steel fiber reinforced concrete-concept, experimental evidence and design recommendations for concrete cone and concrete edge breakout failure modes." Engineering Structures, 181: 60-75.

상세보기
M. Weglorz (2017). "Influence of headed anchor group layout on concrete failure in tension." Procedia Engineering, 193:242-249.

상세보기
N. D. Tung, & N. V. Tue (2018). "Shear resistance of steel fiberreinforced concrete beams without conventional shear reinforcement on the basis of the critical shear band concept." Engineering Structures, 168: 698-707.

상세보기
S. Gali, & K. Subramaniam (2017). "Investigation of the dilatant behavior of cracks in the shear response of steel fiber reinforced concrete beams." Engineering Structures, 152:832-842.

상세보기
S. H. Kim, S. C Peak, C. Y. Lee, H. W. Yuk, & Y. T. Lee (2018). "Development strength of headed reinforcing bars for steel fiber reinforced concrete by pullout test". Architectural Research, 20: 129-135.

원문보기 상세보기
S. J. Jang, & H. D. Yun (2018). "Combined effects of steel fiber and coarse aggregate size on the compressive and flexural toughness of high strength concrete." Engineering Structures, 185: 203-211.
S. Yilmaz, M. A. Ozen, & Y. Yardim (2013). "Tensile behavior of post-installed chemical anchors embedded to low strength concrete." Construction and Building Materials, 47: 861-866.

상세보기
S. Y. Seo, B. R. Nam, & S. K. Kim (2016). "Tensile strength of the grout-filled head-splice-sleeve." Construction and Building Materials, 124: 155-166.

상세보기
Z. M. Yaseen, M. T. Tran, S. W. Kim, T. Bakhshpoori, & R. C. Deo (2018). "Shear strength prediction of steel fiber reinforced concrete beam using hybrid intelligence models: A new approach." Engineering Structures, 177: 244-255.

상세보기

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증