| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Biscaia, Hc
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2018Development of a simple bond-slip model for joints monitored with the DIC techniquecitations
- 2017Prediction of the interfacial performance of CFRP laminates and old timber bonded joints with different strengthening techniquescitations
- 2017Flexural Strengthening of Old Timber Floors with Laminated Carbon Fiber-Reinforced Polymerscitations
- 2016Analysis of the debonding process of CFRP-to-timber interfacescitations
- 2016Influence of External Compressive Stresses on the Performance of GFRP-to-Concrete Interfaces Subjected to Aggressive Environments: An Experimental Analysiscitations
- 2016Experimental Evaluation of Bonding between CFRP Laminates and Different Structural Materialscitations
- 2015Numerical modelling of the effects of elevated service temperatures on the debonding process of FRP-to-concrete bonded jointscitations
- 2015Factors influencing the performance of externally bonded reinforcement systems of GFRP-to-concrete interfacescitations
- 2015Bond-slip model for FRP-to-concrete bonded joints under external compressioncitations
- 2014An experimental study of GFRP-to-concrete interfaces submitted to humidity cyclescitations
- 2013Bond-slip on CFRP/GFRP-to-concrete joints subjected to moisture, salt fog and temperature cyclescitations
- 2013Modelling GFRP-to-concrete joints with interface finite elements with rupture based on the Mohr-Coulomb criterioncitations
- 2013A smeared crack analysis of reinforced concrete T-beams strengthened with GFRP compositescitations
- 2013Nonlinear numerical analysis of the debonding failure process of FRP-to-concrete interfacescitations
- 2012Double shear tests to evaluate the bond strength between GFRP/concrete elementscitations
- 2010Effects of exposure to saline humidity on bond between GFRP and concretecitations
Places of action
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article
A smeared crack analysis of reinforced concrete T-beams strengthened with GFRP composites
Abstract
The strengthening of reinforced concrete structures with laminates of fibre reinforced polymeric (FRP) matrix has received considerable attention, although there still is lack of information on the more adequate modelling of the interface between FRP composites and concrete. An experimental programme is described and was designed to: (i) characterise glass FRP-to-concrete interface by shear tests; (ii) analyse reinforced concrete T-beams with external GFRP plates. Double shear tests were carried out based on 15 cm cubes with GFRP bonded to two opposite faces. The concrete T-beams were 3.0 m long and 0.28 m high and were loaded till rupture in 4-point bending tests. The external reinforcement system showed great strength increment in relation to the non retrofitted T-beam, confirming to be an effective approach to the flexural strengthening of RC beams. The computational analysis was based on a three dimensional smeared crack model. In total, 22 computational analyses were made. Models with and without interface FE associated with Mohr-Coulomb failure criterion for the FRP-to-concrete interface were defined and different strength types of concrete were considered. The rigid interface does not predict the rupture of the T-beam with precision; however, the results obtained for low concrete strengths revealed that rigid interfaces can be assumed when conjugated with the fixed crack approach. Consequently, a slightly stiffer response of the beam is obtained. The maximum bond stresses obtained from Finite Element Analysis (FEA) revealed that the models with rigid interfaces developed lower bond stresses due to the lack of relative displacements between both materials. The effects of assuming either fixed or rotated crack approaches were also compared. The rotated crack conjugated to a fine mesh in the vicinity of the GFRP-to-concrete stress led to a very good estimation of the bond stresses along the interface. The prediction of the T-beam rupture was also estimated with better results when the rotated crack was used in the model. In general, the FEA predicted with very good results the de-bonding of the GFRP-to-concrete interface of T-beams externally bonded with GFRP composites. Crown Copyright