Steel and Composite Structures

  • 제18권5호
  • /
  • Pages.1145-1160
  • /
  • 2015
  • /
  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Steel-CFRP composite and their shear response as vertical stirrup in beams

  • Uriayer, Faris A. (Department of Civil Engineering, Jamia Millia Islamia, New Delhi, India on leave from Kufa University) ;
  • Alam, Mehtab (Department of Civil Engineering, Faculty of Engineering and Technology)
  • 투고 : 2013.12.22
  • 심사 : 2014.11.08
  • 발행 : 2015.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

An experimental study was conducted for the effectiveness of steel-CFRP composite (CFRP laminates sandwiched between two steel strips) as stirrups in concrete beam to carry shearing force and comparison was made with conventional steel bar stirrups. A total numbers of 8 concrete beams were tested under four point loads. Each beam measured 1,600 mm long, 160 mm width and 240 mm depth. The beams were composed of same grade of concrete, with same amount of flexural steel but different shear reinforcements. The main variables include, type of stirrups (shape of stirrups and number of CFRP layers used in each stirrup) and number of stirrups used in shear spans. After getting on an excellent closeness between the values of ultimate shear resistance and ultimate tensile load of steel-CFRP stirrups, it could be concluded that the steel-CFRP stirrups represent the effective solution of premature failure of FRP stirrups at the bends.

키워드

참고문헌

  1. ACI 440.4R-04 (2004), Prestressing Concrete Structures with FRP Tendons, Farmington Hills, MI, USA.
  2. ACI 440.1R-06 (2006), Guide for The Design and Construction of Structural Concrete Reinforced with FRP Bars, Farmington Hills, MI, USA.
  3. Bousselham, A. and Chaallal, O. (2008), "Mechanisms of shear resistance of concrete beams strengthened in shear with externally bonded FRP", J. Compos. Construct., 12(5), 499-512. https://doi.org/10.1061/(ASCE)1090-0268(2008)12:5(499)
  4. CAN/CSA-S06-06 (2006),Canadian Highway Bridge Design Code , Rexdale, ON, Canada.
  5. El-Sayed, A., El-Salakawy, E. and Benmokrane, B. (2007), "Mechanical and structural characterization of new carbon FRP stirrups for concrete members", J. Compos. Construct., 11(4), 352-362. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:4(352)
  6. Lau, D. and Pam, H.J. (2010), "Experimental study of hybrid FRP reinforced concrete beams", Eng. Struct., 32(12), 3857-3865. https://doi.org/10.1016/j.engstruct.2010.08.028
  7. Lee, C., Kim, J. and Heo, S. (2010), "Experimental observation on the effectiveness of fiber sheet strip stirrups in concrete beams", J. Compos. Construct., 14(5), 487-497. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000109
  8. McGregor, J.G. and Wight, J.K. (2008), Reinforced Concrete: Mechanics and Design, Prentice-Hall, Englewood Cliffs, NJ, USA.
  9. Pellegrino, C. and Modena, C. (2008), "An experimentally based analytical model for shear capacity of FRP strengthened reinforced concrete beams", Mech. Compos. Mater., 44(3), 231-244. https://doi.org/10.1007/s11029-008-9016-y
  10. Uriayer, F.A. and Alam, M. (2013), "Mechanical properties of steel-CFRP composite specimen under uniaxial tension", Steel Compos. Struct., Int. J., 15(6), 659-677. https://doi.org/10.12989/scs.2013.15.6.659
  11. Wu, G., Wu, Z.S., Luo, Y.B., Sun, Z.Y. and Hu, X.Q. (2010), "Mechanical properties of steel-FRP composite bar under uniaxial and cyclic tensile loads", J. Mater. Civil Eng., 22(10), 1056-1066. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000110