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Structural Engineering and Mechanics Volume 78, Number 5, June10 2021 , pages 573-583 DOI: https://doi.org/10.12989/sem.2021.78.5.573 |
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Impact of thermal effects in FRP-RC hybrid cantilever beams |
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Hassaine Daouadji Tahar, Rabahi Abderezak, Benferhat Rabia and Abdelouahed Tounsi
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| Abstract | ||
| This paper presents a theoretical approach of the structures reinforced with bonded FRP composites, taking into account loading model, shear lag effect and the thermal effect. These composites are used, in particular, for rehabilitation of structures by stopping the propagation of the cracks. They improve rigidity and resistance, and prolong their lifespan. In this paper, an original model is presented to predict and to determine the stresses concentration at the FRP end, with the new theory analysis approach. The model is based on equilibrium and deformations compatibility requirements in and all parts of the strengthened beam, i.e., the concrete beam, the FRP plate and the adhesive layer. The theoretical predictions are compared with other existing solutions. The numerical resolution was finalized by taking into account the physical and geometric properties of materials that may play an important role in reducing the stress values. This solution is general in nature and may be applicable to all kinds of materials. | ||
| Key Words | ||
| interfacial stresses; RC beam; strengthening; shear lag effect; thermal effects; composite materials | ||
| Address | ||
| Hassaine Daouadji Tahar, Rabahi Abderezak, Benferhat Rabia: Civil Engineering Department, University of Tiaret, Algeria; Laboratory of Geomatics and Sustainable Development, University of Tiaret, Algeria Abdelouahed Tounsi: YFL (Yonsei Frontier Lab), Yonsei University, Seoul, Korea; LMH Laboratory, Civil Engineering Department, University of Sidi Bel Abbes, Algeria; Department of Civil and Environmental Engineering, King Fahd University Saudi Arabia | ||