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      Flexural Strength of Carbon Fiber Reinforced Polymer Repaired Cracked Rectangular Hollow Section Steel Beams

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      International Journal of Polymer Science

      Hindawi Limited

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          Abstract

          The flexural behavior of rectangular hollow section (RHS) steel beams with initial crack strengthened externally with carbon fiber reinforced polymer (CFRP) plates was studied. Eight specimens were tested under three-point loading to failure. The experimental program included three beams as control specimens and five beams strengthened with CFRP plates with or without prestressing. The load deflection curves were graphed and failure patterns were observed. The yield loads and ultimate loads with or without repairing were compared together with the strain distributions of the CFRP plate. It was concluded that yield loads of cracked beams could be enhanced with repairing. Meanwhile, the ultimate loads were increased to some extent. The effect of repair became significant with the increase of the initial crack depth. The failure patterns of the repaired specimens were similar to those of the control ones. Mechanical clamping at the CFRP plate ends was necessary to avoid premature peeling between the CFRP plate and the steel beam. The stress levels in CFRP plates were relatively low during the tests. The use of prestressing could improve the utilization efficiency of CFRP plates. It could be concluded that the patching repair could be used to restore the load bearing capacity of the deficient steel beams.

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          Most cited references 16

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          State-of-the-art review on FRP strengthened steel structures

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            Fatigue strengthening of damaged metallic beams using prestressed unbonded and bonded CFRP plates

             M. Galli,  A Herwig,  J Botsis (2012)
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              Strengthening of a Steel Bridge Girder Using CFRP Plates

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                Author and article information

                Journal
                International Journal of Polymer Science
                International Journal of Polymer Science
                Hindawi Limited
                1687-9422
                1687-9430
                2015
                2015
                : 2015
                :
                : 1-9
                Article
                10.1155/2015/204861
                © 2015

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