FRP strengthening of steel and steel-concrete composite structures: an analytical approach |
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Authors: | Carlo Pellegrino Emanuele Maiorana Claudio Modena |
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Affiliation: | (1) Department of Structural and Transportation Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy |
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Abstract: | A recent technique for strengthening steel and steel-concrete composite structures by the use of externally bonded Fiber Reinforced
Polymer (FRP) sheets, to increase the flexural capacity of the structural element, is described. Several researches developed
FRP strengthening of reinforced concrete and masonry structures, but few experimental studies about steel and steel-concrete
composite elements are available. Some examples of guidelines for the design and construction of externally bonded FRP systems
for strengthening existing metal structures are available, but the method used to predict the flexural behaviour of FRP strengthened
elements is usually based on the hypothesis of elastic behaviour of materials and FRP laminate is mainly considered only under
the tensile flange. In this paper, an analytical procedure to predict the flexural behaviour of FRP strengthened steel and
steel-concrete composite elements, based on cross-sectional behaviour and taking into account the non-linear behaviour of
the materials with any configuration of FRP reinforcement, is given. Analytical predictions are compared with some experimental
results available in the literature on the flexural behaviour of FRP strengthened steel and steel-concrete composite elements,
showing good agreement of the results, even in the non-linear phase, until failure. |
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Keywords: | Steel Steel-concrete composite Flexural elements FRP Strengthening |
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