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    Volume 46, Issue 6 (April 2018)

    Testing and Evaluation of Bond Surface Profile Influencing the CFRP Strengthening of Steel Members

    (Received 26 March 2017; accepted 2 June 2017)

    Published Online: 02 April 2018

    CODEN: JTEVAB

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    Abstract

    The strengthening of steel structures using Fiber-Reinforced Polymers (FRP) is one of the most effective strengthening techniques based on recent research. Usually, FRP has good characteristics with regard to a high strength-to-weight ratio, chemical resistance, and corrosion resistance. Generally, steel-structure strengthening is accomplished by changing the inherent property of the section. Comparatively, the FRP strengthening technique has simplicity, lighter weight, higher strength, and greater durability. The strength of the FRP-strengthened steel member depends on the bond between the FRP and steel substrate. In the present experimental investigation, the bond strength between the FRP and steel substrate is studied for different surface profiles (SA 2, SA 21/2, and SA 3), which are prepared with two different types of blasting, namely, sand blasting and copper slag blasting. A series of pull-off and pull tests have been carried out to assess the bond strength between FRP and steel substrate. From the pull-off test results, the maximum average bond-strength values of copper slag–blasted test specimens are 39.37 (SA 2), 35.71 (SA 21/2), and 31.44 % (SA 3) higher than those of the test specimens prepared with sand blasting. In the pull test, the maximum average tensile strength values of the copper slag–blasted test specimens are 20.95 (SA 2), 29.51 (SA 21/2), and 37.30 % (SA 3) higher than those of the sand-blasted test specimens prepared with the same profiles. Thus, the performance of test specimens prepared with the SA 3 surface profile with copper slag blasting is potentially stronger than other surface profiles.

    Author Information:

    Cyril Thomas, A.
    Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu

    Baskar, K.
    Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu


    Stock #: JTE20170195

    ISSN:0090-3973

    DOI: 10.1520/JTE20170195

    Author
    Title Testing and Evaluation of Bond Surface Profile Influencing the CFRP Strengthening of Steel Members
    Symposium ,
    Committee D30