Numerical investigation of parameters influencing debonding of FRP sheets in shear-strengthened beams
| Autor: | M.J. Esfandiari, H. Rahimi Bondarabadi, S. Sheikholarefin, S.H. Dehghan Manshadi |
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| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
Materials science business.industry Constitutive equation Linear elasticity 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Structural engineering Fibre-reinforced plastic Orthotropic material Finite element method 0201 civil engineering 021105 building & construction Composite material business Reinforcement Failure mode and effects analysis Civil and Structural Engineering Parametric statistics |
| Zdroj: | European Journal of Environmental and Civil Engineering. 22:246-266 |
| ISSN: | 2116-7214 1964-8189 |
| DOI: | 10.1080/19648189.2016.1186117 |
| Popis: | An effective technique for strengthening of concrete members is to provide extra reinforcements in the form of externally bonded fibre-reinforced polymer (FRP) sheets. Nonetheless, debonding often prevents strengthened beams from gaining their full load capacity and experimental studies have confirmed this. The current study proposes a non-linear three-dimensional (3D) finite element model to look into debonding failure of FRP sheets and its consequential effects in various strengthening schemes such as side-bonded and U-wrap (i.e. continuous FRP or discontinuous strips). 3D elements with linear elastic orthotropic constitutive relation was assumed for the FRP sheet and appropriate interface elements are used to simulate bond–slip behaviour between concrete, internal steel reinforcements and external FRP reinforcement. Once the model was validated against published experimental results, a parametric study was conducted to research the influence of some parameters on the shear capacity and failure mode, wi... |
| Databáze: | OpenAIRE |
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