Three Dimensional, Linear and Nonlinear Finite Element Modeling of FRP to Concrete Pull-Off Test

Abstract:

External bonding of fiber reinforced polymer (FRP) sheets to concrete is a popular method of strengthening reinforced concrete (RC) structures. A simple test was set-up in order to simulate the process of debonding in this type of strengthening. The set-up is simulating the bond behavior of strengthened RC structures. In the recent researches it was found out that bond behavior and actual stress distribution is a 3 dimensional phenomenon. This paper is presenting more details about pull-off tests by applying 3-D and nonlinear finite element models. As a first step linear model has been generated to show general stress distribution in the test, in a second step nonlinear model is implemented in order to predict the behavior of pull-off tests more accurately. Tests have shown that at ultimate load, deboning occurs within a concrete layer near the bond surface. Therefore, the paper is focusing on using a more realistic concretebehavior in the model.

• Periodical: Applied Mechanics and Materials (Volume 147)
• Pages: 92-98
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.147.92
• Online since: December 2011
• Authors: Majid Noori Hamedani
• Keywords: Bond Behaviour, Concrete, FRP, Pull-Off Test, Slip

References

[1] Lu, X. Z., J. G. Teng, L. P. Ye and J. J. Jiang: Engineering structures 27(6) (2005), pp.920-937.

[2] J. F. Chen and W. K. Pan: Construction and Building Materials 20(2006), pp.46-58.

[3] Information on http: /www. sika. com. au.

[4] Information on http: /www. basf-cc. co. in.

[5] H. Toutanji, P. Saxena, L. Y. Zhao and T. Ooi: Journal of Composites for construction, ASCE 11(4) (2007), pp.427-436.

[6] C. Mazzotti, M. Savoia and B. Ferracuti: Construction and building materials 22(7) (2008), pp.1409-1421.

DOI: 10.1016/j.conbuildmat.2007.04.009

[7] Czaderski, C., K. Soudki, and M. Motavalli: Journal of Composites for Construction, ASCE, 14(4) (2010), pp.451-463.

[8] G. Camata, E. Spacone, R. Zarnic: Composites: Part B 38 (2007), 277–288.

[9] ACI_440. 2R: American Concrete Institute (2008).

[10] G. C. Mays and A. R. Hutchinson, in Adhesives in civil engineering, Cambridge University Press.

[11] GB 50010, in Code for design of concrete structures, Building Industry Press, Beijing, (2002).

[12] Govindjee S, Kay GJ, Simo JC: International Journal of Numerical Methods Engineering 1995; 38: 3611–33.

[13] Abaqus user's manual ver. 6. 9. 1.

[14] ACI_318-05 (2008), in: Building code requirements for structural concrete and commentary. " (ACI 318R-05). American Concrete Institute.

DOI: 10.1016/0262-5075(85)90031-4

[15] TR55 (2004), in: Design guidance for strengthening concrete structures using fibre composite materials, SecondEdition, Technical Report No. 55 of the Concrete Society, UK. p.102.