Steel and Composite Structures

  • 제32권1호
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  • Pages.21-35
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  • 2019
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Strengthening of steel-concrete composite beams with prestressed CFRP plates using an innovative anchorage system

  • Wan, Shi-cheng (School of Transportation, Southeast University) ;
  • Huang, Qiao (School of Transportation, Southeast University) ;
  • Guan, Jian (School of Transportation, Southeast University)
  • 투고 : 2018.05.16
  • 심사 : 2019.05.30
  • 발행 : 2019.07.10
⟨ 이전 논문 다음 논문 ⟩

초록

This study investigates the flexural behavior of steel-concrete composite beams strengthened with prestressed carbon fiber-reinforced polymer (CFRP) plates. An innovative mechanical anchorage system was developed. The components of the system can be easily assembled on site before applying a prestressing force, and removed from the structures after strengthening is completed. A total of seven steel-concrete composite specimens including four simply supported beams strengthened at the positive moment region and three continuous beams strengthened at the negative moment region were tested statically until failure. Experimental results showed that the use of prestressed CFRP plates enhanced the flexural capacity and reduced the mid-span deflection of the beams. Furthermore, by prestressing the CFRP laminates, the material was used more efficiently, and the crack resistance of the continuous composite specimens at the central support was significantly improved after strengthening. Overall, the anchorage system proved to be practical and feasible for the strengthening of steel-concrete composite beams. The theoretical analysis of ultimate bearing capacity is reported, and good agreement between analytical values and experimental results is achieved.

키워드

참고문헌

  1. Aiello, M.A., Valente, L. and Rizzo, A. (2007), "Moment redistribution in continuous reinforced concrete beams strengthened with carbon-fiber-reinforced polymer laminates", Mech. Compos. Mater., 43(5), 453-466. https://doi.org/10.1007/s11029-007-0043-x
  2. Akbarzadeh, H. and Maghsoudi, A.A. (2010), "Experimental and analytical investigation of reinforced high strength concrete continuous beams strengthened with fiber reinforced polymer", Mater. Des., 31(3), 1130-1147. https://doi.org/10.1016/j.matdes.2009.09.041
  3. Al-Saidy, A.H., Klaiber, F.W. and Wipf, T.J. (2007), "Strengthening of steel-concrete composite girders using carbon fiber reinforced polymer plates", Constr. Build. Mater., 21(2), 295-302. https://doi.org/10.1016/j.conbuildmat.2005.08.018
  4. Ashour, A.F., El-Refaie, S.A. and Garrity, S.W. (2004), "Flexural strengthening of RC continuous beams using CFRP laminates", Cement Concrete Compos., 26(7), 765-775. https://doi.org/10.1016/j.cemconcomp.2003.07.002
  5. Basler, M., Clanin, R. and Limin, W. (2004), "Bridge strengthening with prestressed CFRP plate systems", Proceedings of IABSE Symposium: Metropolitan Habitats and Infrastructure, Shanghai, China, January.
  6. Chen, S., Wang, X. and Jia, Y. (2009), "A comparative study of continuous steel-concrete composite beams prestressed with external tendons: experimental investigation", J. Constr. Steel Res., 65(7), 1480-1489. https://doi.org/10.1016/j.jcsr.2009.03.005
  7. Correia, L., Teixeira, T., Michels, J., Almeida, J.A. and Sena-Cruz, J. (2015), "Flexural behaviour of RC slabs strengthened with prestressed CFRP strips using different anchorage systems", Compos. Part B: Eng., 81, 158-170. https://doi.org/10.1016/j.compositesb.2015.07.011
  8. Czaderski, C. and Motavalli, M. (2007), "40-Year-old full-scale concrete bridge girder strengthened with prestressed CFRP plates anchored using gradient method", Compos. Part B: Eng., 38(7-8), 878-886. https://doi.org/10.1016/j.compositesb.2006.11.003
  9. Deng, L.N. (2010), "Experimental research and theoretical analysis of flexural members strengthened with prestressed CFRP Plates", Ph.D. Dissertation; Guangxi University, Nanning, China.
  10. El-Hacha, R. and Aly, M.Y. (2012), "Anchorage system to prestress FRP laminates for flexural strengthening of steelconcrete composite girders", J. Compos. Constr., 17(3), 324-335. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000323
  11. Garden, H.N. and Hollaway, L.C. (1998), "An experimental study of the failure modes of reinforced concrete beams strengthened with prestressed carbon composite plates", Compos. Part B: Eng., 29(4), 411-424. https://doi.org/10.1016/S1359-8368(97)00043-7
  12. Ghafoori, E. and Motavalli, M. (2015), "Normal, high and ultrahigh modulus carbon fiber-reinforced polymer laminates for bonded and un-bonded strengthening of steel beams", Mater. Des., 67, 232-243. https://doi.org/10.1016/j.matdes.2014.11.031
  13. Hu, S.W. and Ye, X.F. (2014), "Test for flexural behavior of prestressed steel concrete continuous composite beams", Adv. Sci. Technol. Water Resources, 34(1), 37-42. https://doi.org/10.3880/j.issn.1006-7647.2014.01.007
  14. Peng, H., Shang, S.P., Zhang, J.R. and Li, C.X. (2009), "Test and theoretical research of T-beam strengthened with prestressed CFRP plate", J. Highway Transport. Res. Develop., 26(10), 59-65. https://doi.org/10.3969/j.issn.1002-0268.2009.10.012
  15. Samaaneh, M.A., Sharif, A.M., Baluch, M.H. and Azad, A.K. (2016), "Numerical investigation of continuous composite girders strengthened with CFRP", Steel Compos. Struct., Int. J., 21(6), 1307-1325. http://dx.doi.org/10.12989/scs.2016.21.6.1307
  16. Tavakkolizadeh, M. and Saadatmanesh, H. (2003), "Strengthening of steel-concrete composite girders using carbon fiber reinforced polymers sheets", J. Struct. Eng., 129(1), 30-40. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:1(30)
  17. Triantafillou, T.C., Deskovic, N. and Deuring, M. (1992), "Strengthening of concrete structures with prestressed fiber reinforced plastic sheets", ACI Struct. J., 89(3), 235-244.
  18. Wang, W.W., Dai, J.G. and Harries, K.A. (2013), "Intermediate crack-induced debonding in RC beams externally strengthened with prestressed FRP laminates", J. Reinf. Plastics Compos., 32(23), 1842-1857. https://doi.org/10.1177/0731684413492574
  19. Wight, R.G., Green, M.F. and Erki, M.A. (1996), "Poststrengthening prestressed concrete beams with prestressed FRP sheets", Proceedings of the 2nd International Conference on Advanced Composite Materials in Bridges and Structures, Montreal, Canada, June.
  20. Yousefi, O., Narmashiri, K. and Ghaemdoust, M.R. (2017), "Structural behaviors of notched steel beams strengthened using CFRP strips", Steel Compos. Struct., Int. J., 25(1), 35-43. https://doi.org/10.12989/scs.2017.25.1.035

피인용 문헌

  1. Experimental analysis of shear deficient reinforced concrete beams strengthened by glass fiber strip composites and mechanical stitches vol.40, pp.2, 2019, https://doi.org/10.12989/scs.2021.40.2.267