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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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Silva, Mag
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Topics
Publications (17/17 displayed)
- 2019Bond durability of CFRP laminates-to-steel joints subjected to freeze-thawcitations
- 2017Aging of some GFRP-concrete joints under external pressure
- 2017Bond characteristics of CFRP-to-steel jointscitations
- 2016Influence of External Compressive Stresses on the Performance of GFRP-to-Concrete Interfaces Subjected to Aggressive Environments: An Experimental Analysiscitations
- 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
- 2014Composites and FRP-Strengthened Beams Subjected to Dry/Wet and Salt Fog Cyclescitations
- 2014On estimates of durability of FRP based on accelerated testscitations
- 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
- 2010Monotonic axial behavior and modelling of RC circular columns confined with CFRPcitations
- 2006Size and relative stiffness effects on compressive failure of concrete columns wrapped with glass FRPcitations
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article
Bond-slip on CFRP/GFRP-to-concrete joints subjected to moisture, salt fog and temperature cycles
Abstract
Research on bond between composite and concrete on beams externally reinforced with fiber reinforced polymers (ERBs) has generated many publications, but uncertainties remain. The issue of the long term behavior of those joints, especially the effect that severe and prolonged environmental actions may induce, justifies the search for additional data and recommendations to avoid premature debonding and failures. The present paper devotes attention to the effects of environmental aging on the constitutive bond-slip curves. Aging was imposed on an accelerated manner and several actions used to degrade the behavior of the joints evaluated by mechanical testing. Prismatic blocks of reinforced concrete linked on the upper side by a stainless steel hinge and externally bonded by a continuous strip of carbon or glass fiber reinforced polymer (CFRP or GFRP) adherent to the soffit were made so as to fit in commercially available laboratory climatic chambers. After aging, they were tested till failure under four point loading. Aging conditions imposed on the CFRP beams were (i) cycles of high-low relative humidity, (ii) salt fog cycles, and, on the GFRP beams, (iii) salt fog cycles, (iv) dry/wet cycles (water with 5.0% weight of NaCl), (v) total immersion in salt water, and (vi) freeze/thaw cycles. The results of the experimental program enabled the proposal of bond-slip laws that take into account the aging of the beams. They also showed that salt fog cycles were more severe in the case of CFRP, while freeze/thaw cycles were more degrading on bond of GFRP-to-concrete. The salt water effects on the GFRP beams appeared to be beneficial, most likely by improving the tensile strength of concrete. Numerical modeling certified by the obtained experimental data is presented that allows more general estimates of the environmental effects. Crown Copyright