Strengthening steel bridge sections using CFRP laminates |
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| Affiliation: | 1. University of Manchester, School of Mechanical, Aerospace & Civil Engineering, Manchester, UK;2. University of Babylon, College of Engineering, Hilla, Iraq;3. University of Warwick, School of Engineering, Coventry, UK |
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| Abstract: | This paper presents results from an experimental investigation to determine the feasibility of using carbon fiber reinforced polymer (CFRP) epoxy laminates to repair steel composite bridge members. Six specimens, each consisting of a 6.1 m long W8×24 wide flange A36 steel beam acting compositely with a 0.114 m thick by 0.71 m wide reinforced concrete slab, were first loaded past yield of the tension flange to simulate severe service distress. The damaged specimens were then repaired using 3.65 m lengths of 2 or 5 mm thick CFRP laminates bonded to the tension flange and tested to failure. The results indicated significant ultimate strength gains but more modest improvement in the elastic response. Non-linear finite element analyses were in good agreement with the experimental results. The study suggests that it is feasible to strengthen steel composite members using CFRP laminates. |
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