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Influence of reinforcement viscous properties on reliability of existing structures strengthened with externally bonded composites

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Abstract The time-depending stress transfer in existing structures strengthened with externally bonded fiber reinforced polymer (FRP) systems, due to viscous effects of reinforcement, is analysed in this paper. A new… Click to show full abstract

Abstract The time-depending stress transfer in existing structures strengthened with externally bonded fiber reinforced polymer (FRP) systems, due to viscous effects of reinforcement, is analysed in this paper. A new modelling strategy for assessing the long-term response of these composite beams was developed, by assembling two one-dimensional components (existing structural element and external strengthening) and accounting for thin-walled sectional geometry of FRPs. Several numerical experiments dealing with FRP laminates-reinforced concrete (RC) composite beams were performed and the corresponding results were compared with the predictions of the Effective Modulus Method (EM). A relevant stress redistribution between the components of the examined strengthened structures was observed.

Keywords: influence reinforcement; reinforcement viscous; existing structures; externally bonded; strengthened externally; structures strengthened

Journal Title: Composite Structures
Year Published: 2018

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