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Keywords: debonding, fibre-reinforced polymer, contact, damage.

Summary

In this paper the complex mechanism of debonding-peeling failure of fibre-reinforced polymer (FRP) reinforcement is studied, with a three-dimensional approach, within the context of damage mechanics to appropriately model transverse effects and develop a more realistic and comprehensive study of the delamination process [1,2,3,4,5].

The system is viewed as composed by three different physical basic layers: the concrete support, the adhesive layer and the composite strip. The adhesion has been reconstructed by means of a contact model and an elastic-damage constitutive law which relates interlaminar stresses acting in the sliding direction.

The ABAQUS finite element code has been supplemented with a numerical procedure accounting for Mazars's damage law inside the contact algorithm. The coupled behaviour between concrete, FRP and adhesive, resulting in specific bonding-debonding features under different load levels, has consequently been attained. It is shown that such an approach is able to model the delamination evolution during the loading processes.

References

1: C. Pellegrino, D. Tinazzi, C. Modena, "Experimental Study on Bond Behaviour between Concrete and FRP Reinforcement", ASCE J. Composites for Construction, 12(2), 180-189, 2008. doi:10.1061/(ASCE)1090-0268(2008)12:2(180)
2: C. Majorana, J. Mazars, "Thermohygrometric and mechanical behaviour of concrete using damage model", J. Mat. Struct., 30, 349-354, 1997. doi:10.1007/BF02480685
3: P. Wriggers, "Computational Contact Mechanics", Springer-Verlag, Berlin Heidelberg, 2006.
4: G. Mazzucco, V. Salomoni, C. Pellegrino, C. Majorana, "Three-dimensional modelling of bond behaviour between concrete and FRP reinforcement", Eng. Comp., 28(1), 5-29, 2011. doi:10.1108/02644401111096993
5: K.V. Subramaniam, C. Carloni, L. Nobile, "An Understanding of the Width Effect in FRP-Concrete Debonding", Int. J. Exp. Mech. 2008. doi:10.1111/j.1475-1305.2008.00481.x

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 93 PROCEEDINGS OF THE TENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 236 Comparisons between Numerical and Experimental Results for Fibre-Reinforced Polymer Strengthened Concrete Elements G. Mazzucco, V. Salomoni, C. Pellegrino and C. Majorana Department of Structural and Transportation Engineering, University of Padova, Italy doi:10.4203/ccp.93.236 purchase the full-text of this paper Full Bibliographic Reference for this paper G. Mazzucco, V. Salomoni, C. Pellegrino, C. Majorana, "Comparisons between Numerical and Experimental Results for Fibre-Reinforced Polymer Strengthened Concrete Elements", in , (Editors), "Proceedings of the Tenth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 236, 2010. doi:10.4203/ccp.93.236 Keywords: debonding, fibre-reinforced polymer, contact, damage. Summary In this paper the complex mechanism of debonding-peeling failure of fibre-reinforced polymer (FRP) reinforcement is studied, with a three-dimensional approach, within the context of damage mechanics to appropriately model transverse effects and develop a more realistic and comprehensive study of the delamination process [1,2,3,4,5]. The system is viewed as composed by three different physical basic layers: the concrete support, the adhesive layer and the composite strip. The adhesion has been reconstructed by means of a contact model and an elastic-damage constitutive law which relates interlaminar stresses acting in the sliding direction. The ABAQUS finite element code has been supplemented with a numerical procedure accounting for Mazars's damage law inside the contact algorithm. The coupled behaviour between concrete, FRP and adhesive, resulting in specific bonding-debonding features under different load levels, has consequently been attained. It is shown that such an approach is able to model the delamination evolution during the loading processes. References 1 C. Pellegrino, D. Tinazzi, C. Modena, "Experimental Study on Bond Behaviour between Concrete and FRP Reinforcement", ASCE J. Composites for Construction, 12(2), 180-189, 2008. doi:10.1061/(ASCE)1090-0268(2008)12:2(180) 2 C. Majorana, J. Mazars, "Thermohygrometric and mechanical behaviour of concrete using damage model", J. Mat. Struct., 30, 349-354, 1997. doi:10.1007/BF02480685 3 P. Wriggers, "Computational Contact Mechanics", Springer-Verlag, Berlin Heidelberg, 2006. 4 G. Mazzucco, V. Salomoni, C. Pellegrino, C. Majorana, "Three-dimensional modelling of bond behaviour between concrete and FRP reinforcement", Eng. Comp., 28(1), 5-29, 2011. doi:10.1108/02644401111096993 5 K.V. Subramaniam, C. Carloni, L. Nobile, "An Understanding of the Width Effect in FRP-Concrete Debonding", Int. J. Exp. Mech. 2008. doi:10.1111/j.1475-1305.2008.00481.x purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £145 +P&P)
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