FE Modeling of FRP-Repaired Planar Concrete Elements Subjected to Monotonic and Cyclic Loading
Publication: Journal of Composites for Construction
Volume 14, Issue 6
Abstract
In this paper, a nonlinear finite-element model is developed for the analysis of plane stress members, such as RC beams and walls, strengthened either unidirectionally or bidirectionally with fiber-reinforced polymer (FRP) composites and subjected to either monotonic or cyclic loading. The model takes into account the effects of the bonded interface between the FRP and concrete while allowing slippage in each direction. A two-dimensional membrane contact element is developed to model the effects of local bond-slip with debonding failure between the FRP and concrete capable of being captured. The model has been incorporated into a finite-element program for the analysis of RC members subject to plane stress with verification against test data of FRP-strengthened RC joints, beams, and walls. The numerical results show good agreement with the experimental data for both load-displacement responses and for the overall failure mechanisms.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This study was funded by the Australian Research Council (ARC) discovery Grant No. ARCDP0453096. The support of the ARC is gratefully acknowledged.
References
ACI Committee 440. (2007). “Report on fiber-reinforced polymer (FRP) reinforcement for concrete structures.” Rep. No. 440R-07, Farmington Hills, Mich.
Aprile, A., Spacone, E., and Limkatanyu, S. (2001). “Role of bond in RC beams strengthened with steel and FRP plates.” J. Struct. Eng., 127(12), 1445–1452.
Crisfield, M. A. (1983). “An arc length method including line searches and accelerations.” Int. J. Numer. Methods Eng., 19, 1269–1289.
Elsayed, W., Ebead, U. A., and Neale, K. W. (2007). “Interfacial behavior and debonding failures in FRP-strengthened concrete slabs.” J. Compos. Constr., 11(6), 619–628.
Foster, S. J. (1992). “An application of the arc length method involving concrete cracking.” Int. J. Numer. Methods Eng., 33(2), 269–285.
Foster, S. J., Budiono, B., and Gilbert, R. I. (1996). “Rotating crack finite element model for reinforced concrete structures.” International Journal of Computers and Structures, 58(1), 43–50.
Foster, S. J., and Marti, P. (2003). “Cracked membrane model: FE implementation.” J. Struct. Eng., 129(9), 1155–1163.
Goodman, R. E., Taylor, R. L., and Brekke, T. L. (1968). “A model for the mechanics of jointed rock.” J. Soil Mech. and Found. Div., 94(SM3), 637–659.
Hollaway, L. C., and Teng, J. G. (2008). Strengthening and rehabilitation of civil infrastructures using fibre-reinforced polymer (FRP) composites, Woodhead, Cambridge, U.K.
Homam, S. M., Sheikh, S. A., Pernica, G., and Mukherjee, P. K. (2000). “Durability of fibre reinforced polymers (FRP) used in concrete structures.” Research Rep., Dept. of Civil Engineering, Univ. of Toronto, Toronto.
Hoshino, H. (1974). “Ein beitrag zur untersuchung des spannungszustandes an arbeitsfugen mit spanngliedkopplungen von abschnittsweise in ortbeton hergestellten spannbetonbrucken.” Dissertation, PhD, Darmstadt.
Kaufmann, W., and Marti, P. (1998). “Structural concrete: Cracked membrane model.” J. Struct. Eng., 124(12), 1467–1475.
Khomwan, N. (2005). “Debonding failure in CFRP strengthened plane stress members.” Ph.D. thesis, School of Civil and Environmental Engineering, The Univ. of New South Wales, Kensington, New South Wales, Australia.
Khomwan, N., Foster, S. J., and Smith, S. T. (2005). “Debonding failure in CFRP flexurally strengthened reinforced concrete beams.” UNICIV Rep. No. R-439, School of Civil and Environmental Engineering, The Univ. of New South Wales, Kensington, New South Wales, Australia.
Ko, H., and Sato, Y. (2007). “Bond stress-slip relationship between FRP sheet and concrete under cyclic load.” J. Compos. Constr., 11(4), 419–426.
Lombard, J. C. (1999). “Seismic strengthening and repair of reinforced concrete shear walls using externally bonded carbon fibre tow sheets.” MS thesis, Carleton Univ., Ottawa.
Lu, X. Z., Teng, J. G., Ye, L. P., and Jiang, J. J. (2005). “Bond-slip models for FRP sheets/plates bonded to concrete.” Eng. Struct., 27, 920–937.
Lu, X. Z., Teng, J. G., Ye, L. P., and Jiang, J. J. (2007). “Intermediate crack debonding in FRP-strengthened RC beams: FE analysis and strength model.” J. Compos. Constr., 11(2), 161–174.
Menegotto, M., and Pinto, P. (1973). “Method of analysis for cyclically loaded reinforced concrete plane frames including changes in geometry and nonelastic behaviour of elements under combined normal force and bending.” Proc., IABSE Symp. on Resistance and Ultimate Deformability of Structures Acted on by Well-Defined Repeated Loads, Final Report, IABSE, Lisbon, 15–22.
Nakaba, K., Kanakubo, T., Furuta, T., and Yoshizawa, H. (2001). “Bond behavior between fiber-reinforced polymer laminates and concrete.” ACI Struct. J., 98(3), 359–367.
Neale, K. W. (2007) “Assessment of numerical models for FRP-strengthened concrete structures.” Proc., Asia-Pacific Conf. on FRP in Structures, APFIS 2007, S. T. Smith, ed., IIFC, Hong Kong, 13–22.
Ngo, D., and Scordelis, A. C. (1967). “Finite element analysis of reinforced concrete beams.” ACI J., 64(3), 152–163.
Niu, H. D., and Wu, Z. S. (2006). “Effects of FRP-concrete interface bond properties on the performance of RC beams strengthened in flexure with externally bonded FRP sheets.” J. Mater. Civ. Eng., 18(5), 723–731.
Oehlers, D. J., and Seracino, R. (2004). Design of FRP and steel plated RC structures: Retrofitting beams and slabs for strength, stiffness and ductility, Elsevier, Oxford, U.K.
Okamura, H., and Maekawa, K. (1991). Nonlinear analysis and constitutive models of reinforced concrete, Giho-do, Tokyo.
Pham, H. B., and Al-Mahaidi, R. (2007). “Modeling of CFRP-concrete shear-lap tests.” Constr. Build. Mater., 21, 727–735.
Popovics, S. (1973). “A numerical approach to complete stress-strain curve of concrete.” Cem. Concr. Res., 3, 583–599.
Saatcioglu, M. (1992). “Strength and ductility of confined concrete.” J. Struct. Eng., 118(6), 1590–1607.
Sato, Y., Kimura, K. and Kobatake, Y. (1997). “Bond behavior between CFRP sheet and concrete (Part 1).” J. Struct. Constr. Eng., 500. 75–82 (in Japanese).
Schafer, H. (1975). “A contribution to the solution of contact problems with the aid of bond elements.” Comput. Methods Appl. Mech. Eng., 6, 335–353.
Teng, J. G., Smith, S. T., Yao, J., and Chen, J. F. (2003). “Intermediate crack induced debonding in RC beams and slabs.” Constr. Build. Mater., 17(6–7), 447–462.
Vecchio, F. J., and Bucci, F. (1999). “Analysis of repaired reinforced concrete structures.” J. Struct. Eng., 125(6), 644–652.
Vecchio, F. J., and Collins, M. P. (1986). “The modified compression field theory for reinforced concrete elements subjected to shear.” ACI Struct. J., 83(2), 219–231.
Wong, R. S. Y. (2001). “Towards modelling of reinforced concrete members with externally-bonded fiber reinforced polymer (FRP) composites.” M.A.Sc thesis, Univ. of Toronto, Toronto.
Wong, R. S. Y., and Vecchio, F. J. (2003). “Towards modeling of reinforced concrete members with externally bonded fibre-reinforced polymer composites.” ACI Struct. J., 100(1), 47–57.
Yang, Z., Chen, J., and Proverbs, D. (2003). “Finite-element modelling of concrete cover separation failure in FRP plated RC beams.” Constr. Build. Mater., 17(1), 3–13.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 14 • Issue 6 • December 2010
Pages: 720 - 729
Copyright
© 2010 ASCE.
History
Received: Jul 28, 2009
Accepted: Apr 1, 2010
Published online: Apr 7, 2010
Published in print: Dec 2010
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.