Test results and strength estimation of R/C beams strengthened against flexural or shear failure by the use of SRP and CFRP

Article English OPEN
Mitolidis, G. J. ; Salonikios, T. N. ; Kappos, A. J. (2012)

The paper reports tests on three groups of reinforced concrete (R/C) beam full-scale specimens, strengthened in flexural or shear using Steel Reinforced Polymers (SRP) and Carbon Fibre Reinforced Polymers (CFRP). The first group of five specimens represents the middle part of the span of a continuous beam and specimens are flexurally strengthened. The second group represents the support region of a continuous beam and its four specimens are strengthened in flexure. The third group also represents the support region of a continuous beam and its four specimens are strengthened in shear. Four specimens in total are tested unstrengthened to allow comparisons with the response of strengthened specimens. In addition to the different part of the beam that each specimen represented and the shear or flexural strengthening, the main parameters that varied among the specimens were: the type of polymer (SRP of two different types, or CFRP), the type of steel bars (ribbed or smooth, the latter being representative of older R/C members), the type of anchorage used for the polymers, and the way loading is applied to the specimens. Low strength concrete grade is used for the specimens, again to simulate older R/C members. The recorded response of the specimens is presented and discussed, and the experimentally measured strengths of the specimens are estimated analytically on the basis of the measured deformations of the specimens. Finally conclusions are drawn regarding the relative performance and merits of SRPs and CFRPs as strengthening materials for R/C beams.
  • References (27)
    27 references, page 1 of 3

    [2] Kim, J.Y., Fam, A., Kong, A. and El-Hacha, R. Flexural Strengthening of RC Beams Using Steel Reinforced Polymer (SRP) Composites. In: 7th Int. Symp. FRP Reinforcement for Concrete Structures, SP-230, ACI Vol. 1, Farmington Hills, USA, 2005. Paper # 93.

    [3] Huang, X., Birman, V., Nanni, A. and Tunis, G. Properties and Potential for Application of Steel Reinforced Polymer (SRP) and Steel Reinforced Grout (SRG) Composites. Compos Part B: Eng 2005; 36(1):73-82.

    [4] Barton, B.L., Wobbe, E., Dharani, L.R., Silva, P.F., Birman V., Nanni, A., Alkhrdaji, T., Thomas, J. and Tunis, T. Characterization of RC Beams Strengthened by Steel Reinforced Polymer and Grout (SRP and SRG) Composites. Materials Science and Engineering A 2005; 412:129.

    [5] Matana, M., Nanni, A., Dharani, L., Silva, P. and Tunis, G. Bond Performance of Steel Reinforced Polymer and Steel Reinforced Grout. In: Proceedings of International Symposium on Bond Behaviour of FRP in Structures, BBFS 2005. Paper # 101.

    [6] Figeys, W., Schueremans, L., Brosens, K. and Van Gemert, D. Strengthening of Concrete Structures using Steel Wire Reinforcement Polymer. In: Proceedings of 7th Int. Symp. FRP Reinforcement for Concrete Structures, SP-230, ACI Vol. 1, Farmington Hills, USA 2005, Paper # 43.

    [7] Toutanji, H., Saxena, P., Zao, L. and Ooi, T. Prediction of Interfacial Bond Failure of FRPConcrete Surface. J Compos Construct 2007;11(4):427-436.

    [8] Chen, J., and Teng, J. Anchorage Strength Models for FRP and Steel Plates Bonded to Concrete. J Structural Engineering 2001; 127(7):784-791.

    [9] Khalifa, A.,Gold, W. J., Nanni, A., and Aziz, A. Contribution of Externally Bonded FRP to Shear Capacity of RC Flexural Members. J Compos Construct 1998; 2(4):195-202.

    [10] Yang, Y. X.,Yue, Q. R., and Hu, Y. C. Experimental study on bond performance between carbon fibre sheets and concrete. J Building Structures 2001; 22(3):36-42.

    [11] Yuan, H., and Wu, Z. Interfacial fracture theory in structures strengthened with composite of continuous fibre. In: Proceedings of Symposium of China and Japan: Science and Technology of the 21st Century, Tokyo, 1999.

  • Metrics
    0
    views in OpenAIRE
    0
    views in local repository
    111
    downloads in local repository

    The information is available from the following content providers:

    From Number Of Views Number Of Downloads
    City Research Online - IRUS-UK 0 111
Share - Bookmark