Computers and Concrete

  • 제19권6호
  • /
  • Pages.631-639
  • /
  • 2017
  • /
  • 1598-8198(pISSN)
  • /
  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Flexural behavior and a modified prediction of deflection of concrete beam reinforced with a ribbed GFRP bars

  • Ju, Minkwan (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Park, Cheolwoo (Department of Civil Engineering, Kangwon National University) ;
  • Kim, Yongjae (Department of Civil Engineering, Kangwon National University)
  • 투고 : 2016.07.11
  • 심사 : 2017.02.12
  • 발행 : 2017.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study experimentally investigated the flexural capacity of a concrete beam reinforced with a newly developed GFRP bar that overcomes the lower modulus of elasticity and bond strength compared to a steel bar. The GFRP bar was fabricated by thermosetting a braided pultrusion process to form the outer fiber ribs. The mechanical properties of the modulus of elasticity and bond strength were enhanced compared with those of commercial GFRP bars. In the four-point bending test results, all specimens failed according to the intended failure mode due to flexural design in compliance with ACI 440.1R-15. The effects of the reinforcement ratio and concrete compressive strength were investigated. Equations from the code were used to predict the deflection, and they overestimated the deflection compared with the experimental results. A modified model using two coefficients was developed to provide much better predictive ability, even when the effective moment of inertia was less than the theoretical $I_{cr}$. The deformability of the test beams satisfied the specified value of 4.0 in compliance with CSA S6-10. A modified effective moment of inertia with two correction factors was proposed and it could provide much better predictability in prediction even at the effective moment of inertia less than that of theoretical cracked moment of inertia.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Land, Infrastructure and Transport (MOLIT), National Research Foundation of Korea (NRF)

참고문헌

  1. AASHTO (2009), LRFD Bridge Design Guide Specifications for GFRP-Reinforced Concrete Bridge Decks and Traffic Railings, American Association of State Highway and Transportation Officials, Washington, U.S.A.
  2. AASHTO (2012), LRFD Bridge Design Guide Specifications, American Association of State Highway and Transportation Officials, Washington, U.S.A.
  3. ACI 440.1R-06 (2006), Guide for the Design and Construction of Concrete Reinforced with FRP Bars, American Concrete Institute, Farmington Hills, U.S.A.
  4. ACI 440.1R-15 (2015), Guide for the Design and Construction of Concrete Reinforced with FRP Bars, American Concrete Institute, Farmington Hills, U.S.A.
  5. Adam, M.A., Said, M., Mahmoud, A.A. and Shanour, A.S. (2015), "Analytical and experimental flexural behavior of concrete beams reinforced with glass fiber reinforced polymers bars", Constr. Build. Mater., 84, 354-366. https://doi.org/10.1016/j.conbuildmat.2015.03.057
  6. ASTM D 3916 (2002), Standard Test Method for Tensile Properties of Pultruded Glass Fiber Reinforced Plastic Rods, American Standard Test Method International, West Conshohocken, U.S.A.
  7. Barris, C., Torres, L.I., Turon, A., Baena, M. and Catalan, A. (2009), "An experimental study of the flexural behavior of GFRP RC beams and comparison with prediction models", Compos. Struct., 91(3), 286-295. https://doi.org/10.1016/j.compstruct.2009.05.005
  8. Bischoff, P. (2005), "Reevaluation of deflection prediction for concrete beams reinforced with steel and fiber reinforced polymer bars", J. Struct. Eng., 131(1), 752-767. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:5(752)
  9. Branson, D.E. (1965), Instantaneous and Time-Dependent Deflections of Simple and Continuous Reinforced Concrete Beams, HPR Report No. 7, Part 1, Alabama Highway Department, Bureau of Public Roads.
  10. CAN/CSA S806-12 (2012), Design and Construction of Building Structures with Fibre-Reinforced Polymers, Canadian Standards Association/National Standard of Canada, Ontario, Canada.
  11. Castro, P.F. and Carino, N.J. (1998), "Tensile and nondestructive testing of FRP bars", J. Compos. Constr., 2(1), 17-27. https://doi.org/10.1061/(ASCE)1090-0268(1998)2:1(17)
  12. CSA S6-10 (2010), Canadian Highway Bridge Design Code, Canadian Standards Association, Mississauga, Canada.
  13. FHWA (2010), Status of the Nation's Highways, Bridges, and Transit: Conditions and Performance, Report for Congress, Federal Highway Administration, US Department of Transportation.
  14. http://www.concrete.org/students/AslanFRPRebar.pdf
  15. http://www.concrete.org/students/Pultrall-V-Rod-Technical-Data-Sheet-for-2009-Competition.pdf
  16. ISIS Canada (2007), Reinforcing Concrete Structures with Fibre Reinforced Polymers, ISIS Canada, Winnipeg, Canada.
  17. Korea Expressway Corporation (2013), Research on Decision Making Methodology for Bridge Re-Construction and Maintenance, Report for the Korea Expressway Corporation, Expressway and Transportation Research Institute (ETRI).
  18. Maranan, G.B., Manalo, A.C., Benmokrane, B., Karunasena, W. and Mendis, P. (2015), "Evaluation of the flexural strength and serviceability of geopolymer concrete beams reinforced with glass-fibre-reinforced polymer (GFRP) bars", Eng. Struct., 101, 529-541. https://doi.org/10.1016/j.engstruct.2015.08.003
  19. Park, C., Park, Y., Kim, S. and Ju, M. (2016), "New emerging surface treatment of hybrid GFRP bar for stronger durability of concrete structures", Smart Struct. Syst., 17(4), 593-610. https://doi.org/10.12989/sss.2016.17.4.593
  20. Wang, H. and Belarbi, A. (2013), "Flexural durability of FRP bars embedded in fiber-reinforced-concrete", Constr. Build. Mater., 44, 541-550. https://doi.org/10.1016/j.conbuildmat.2013.02.065
  21. Weber, A. (2005), "Bond properties of a newly developed composite rebar", Proceedings of the International Symposium on Bond Behaviour of FRP in Structures (BBFS 2005), Hong Kong, China, December.
  22. You, Y.J., Kim, J.H.J., Kim, S.J. and Park, Y.H. (2015), "Methods to enhance the guaranteed tensile strength of GFRP rebar to 900 MPa with general fiber volume fraction", Constr. Build. Mater., 75, 54-62. https://doi.org/10.1016/j.conbuildmat.2014.10.047

피인용 문헌

  1. Effect of geometrical configuration on seismic behavior of GFRP-RC beam-column joints vol.9, pp.3, 2017, https://doi.org/10.12989/acc.2020.9.3.313
  2. Shear deformations based on variable angle truss model for concrete beams reinforced with FRP bars vol.79, pp.3, 2021, https://doi.org/10.12989/sem.2021.79.3.337