PEELING-OFF PHENOMENON IN FRP STRENGTHENED CONCRETE BEAMS DUE TO THERMAL RESIDUAL STRESS |
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| Authors: | Qianjun Xu Shichang Duan |
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| Institution: | [1]State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China [2]Hydraulic and Civil Engineering College, Xinjiang Agriculture University, Urumqi 830052, China [3]Beijing Institute of Architectural Design, Beijing 100045, China |
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| Abstract: | Peeling-off phenomena in FRP strengthened concrete beams are investigated in this paper.Based on the beam theory and the fracture mechanics,a new theoretical model is proposed to analyze the peeling-off behavior near FRP-concrete interfaces,which is governed by residual thermal stresses.Numerical examples are presented to provide a clear insight into the failure mechanism.Some suggestions are provided for the optimal design of FRP strengthened structures. |
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| Keywords: | FRP strengthened concrete beams thermal mismatch peeling-off strain energy release rate |
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