Simulating the Behavior of FRP-Confined Cylinders Using the Shear-Friction Mechanism
Publication: Journal of Composites for Construction
Volume 19, Issue 6
Abstract
The axial compressive behavior of concrete confined with fiber reinforced polymer (FRP) has received much attention over the past two and a half decades, with over 90 empirical and semiempirical models developed to predict the compressive stress strain behavior. While there is no doubt that in general these models show a good correlation to the dataset from which they were derived, when applied to a global dataset, accuracy is reduced. In response to the largely empirical analysis approaches, which should only be applied within the bounds from which they were developed, a new, mechanics-based approach for predicting the axial and lateral stress–strain relationships of concentrically loaded FRP-confined cylinders is presented. The approach uses shear-friction theory to simulate the formation and displacement of sliding planes as concrete softens. It is shown that cylinders can fail through two shear-friction mechanisms, namely, through either the formation of a circumferential wedge, or, a single sliding plane. Importantly, from this is shown that although each mechanism is defined by the same shear-friction material properties different stress–strain relationships result and this may explain some of the scatter of test results. In this paper, the mechanism of a single sliding plane is derived and compared with that of a circumferential wedge.
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References
Achillopoulou, D. V., Rousakis, T. C., and Karabinis, A. I. (2012). “Square reinforced concrete columns strengthened through fiber reinforced polymer (FRP) sheet straps.” Proc., 6th Int. Conf. on FRP Composites in Civil Engineering—CICE 2012, J. Monti, ed., IIFC, ON, Canada.
Ansari, F., and Li, Q. (1998). “High-strength concrete subjected to triaxial compression.” ACI Mater. J., 95(6), 747–755.
Balmer, G. G. (1949). “Shear strength of concrete under high triaxial stress—Computation of Mohr’s envelope as a curve.”, Dept. of the Interior Bureau of Reclamation, Research and Geology Div. Branch of Design and Construction, Denver.
Chen, Y., Visintin, P., and Oehlers, D. J. (2013). “Size dependent stress-axial strain and stress-lateral strain models for actively confined concrete.”, Univ. of Adelaide, Adelaide, SA, Australia.
Chen, Y., Visintin, P., and Oehlers, D. J. (2014a). “Concrete shear-friction material properties: Derivation from actively confined cylinder tests.” Adv. Struct. Eng., in press.
Chen, Y., Visintin, P., Oehlers, D. J., and Alengaram, U. (2014b). “Size dependent stress–strain model for unconfined concrete.” J. Struct. Eng., 04013088.
Chen, Y., Zhang, T., Visintin, P., and Oehlers, D. J. (2014c). “Concrete shear-friction material properties: Application to shear sliding and shear capacity of RC beams of all sizes.” Adv. Struct. Eng., in press.
Cusson, D., and Paultre, P. (1995). “Stress strain model for confined high-strength concrete.” J. Struct. Eng., 468–477.
De Lorenzis, L., and Tepfers, R. (2003). “Comparative study of models on confinement of concrete cylinders with fiber-reinforced polymer composites.” J. Compos. Constr., 219–237.
Harmon, T. G., Ramakrishnan, S., and Wang, E. H. (1998). “Confined concrete subjected to uniaxial monotonic loading.” J. Eng. Mech., 1303–1309.
Haskett, M., Oehlers, D. J., Mohamed Ali, M. S., and Sharma, S. K. (2010). “The shear friction aggregate interlock resistance across sliding planes in concrete.” Mag. Concr. Res., 62(12), 907–924.
Haskett, M., Oehlers, D. J., Mohamed Ali, M. S., and Sharma, S. K. (2011). “Evaluating the shear-friction resistance across sliding planes in concrete.” Eng. Struct., 33(4), 1357–1364.
Hsu, T. T. C. (1998). “Unified approach to shear analysis, and design.” Cem. Concr. Compos., 20(6), 419–435.
Jamet, P., Millard, A., and Nanas, G. (1984). “Triaxial behaviour of a micro-concrete complete stress-strain curves for confining pressures ranging from 0 to 100 MPa.” RILEM-CEB Int. Conf. Concrete under Multiaxial Conditions, INSA Toulouse, Toulouse, France, 133–140.
Karabinis, A. I., and Rousakis, T. C. (2002). “Concrete confined by FRP material: A plasticity approach. “ Eng. Struct., 24(7), 923–932.
Karam, G., and Tabbara, M. (2009). “Hoek–Brown strength criterion for actively confined concrete.” J. Mater. Civ. Eng., 110–118.
Lam, L., and Teng, J. G. (2003). “Design-oriented stress–strain model for FRP-confined concrete in rectangular columns.” J. Reinf. Plast. Compos., 22(13), 1149–1186.
Lam, L., and Teng, J. G. (2004). “Ultimate condition of fiber reinforced polymer-confined concrete.” J. Compos. Constr., 539–548.
Lu, X. B., and Hsu, C. T. (2006). “Behavior of high strength concrete with and without steel fiber reinforcement in triaxial compression.” Cem. Concr. Res., 36(9), 1679–1685.
Mattock, A. H. (1974). “Shear transfer in concrete having reinforcement at an angle to the shear plane.” ACI Spec. Publ., 42(2), 17–42.
Mohamed Ali, M. S., Oehlers, D. J., and Griffith, M. C. (2010). “The residual strength of confined concrete.” Adv. Struct. Eng., 13(4), 603–618.
Nisticò, N., Pallini, F., Rousakis, T., Wu, Y. F., and Karabinis, A. (2014). “Peak strength and ultimate strain prediction for FRP confined square and circular concrete sections.” Compos. Part B: Eng., 67, 543–554.
Oehlers, D. J., Visintin, P., Chen, J. F., and Ibell, T. (2014a). “Simulating RC members. Part 1: Partial interaction properties.” ICE Struct. Build., 167(11), 646–653.
Oehlers, D. J., Visintin, P., Chen, J. F., and Ibell, T. (2014b). “Simulating RC members. Part 2: Displacement based analysis.” ICE Struct. Build., 167(12), 718–727.
Oehlers, D. J., Visintin, P., Zhang, T., Chen, Y., and Knight, D (2012). “Flexural rigidity of reinforced concrete members using a deformation based analysis.” Concr. Aust., 38(4), 50–56.
Ozbakkaloglu, T., Lim, J. C., and Vincent, T. (2013). “FRP-confined concrete in circular sections: Review and assessment of stress–strain models.” Eng. Struct., 49, 1068–1088.
Popovics, S. (1973). “A numerical approach to the complete stress–strain curve of concrete.” Cem. Concr. Res., 3(5), 583–599.
Roddenberry, M., Kampmann, R., Ansley, M. H., Bouchard, N., and Ping, W. V. (2011). “Failure behavior of concrete cylinders under different end conditions.” ACI Mater. J., 108(1), 79–87.
Rousakis, T. C., Rakitzis, T. D., and Karabinis, A. I. (2012). “Design-oriented strength model for FRP-confined concrete members.” J. Compos. Constr., 615–625.
Rutland, C. A., and Wang, M. L. (1997). “The effects of confinement on the failure orientation in cementitious materials experimental observations.” Cem. Concr. Compos., 19(2), 149–160.
Teng, J. G., Huang, Y. L., Lam, L., and Ye, L. P. (2007). “Theoretical model for fiber-reinforced polymer confined concrete.” J. Compos. Constr., 201–210.
Van Mier, J. G. M., and Man, H. K. (2009). “Some notes on microcracking, softening, localization, and size effects.” Int. J. Damage Mech., 18(3), 283–309.
Visintin, P., Chen, Y., and Oehlers, D. J. (2015). “Size dependent axial and lateral stress strain relationships for actively confined concrete.” Adv. Struct. Eng., 18(1), 1–20.
Visintin, P., Oehlers, D. J., Wu, C., and Haskett, M., (2012). “A mechanics solution for hinges in RC beams with multiple cracks.” Eng. Struct., 36, 61–69.
Visintin, P., Oehlers, D. J., Wu, C., and Haskett, M., (2013). “A mechanics based hinge analysis for reinforced concrete columns.” J. Struct. Eng., 1973–1980.
Walraven, J. C., and Reinhardt, H. W. (1981). “Theory and experiments on the mechanical behaviour of cracks in plain and reinforced concrete subjected to shear loading.” HERON, 26(1A).
Xiao, Q. G., Teng, J. G., and Yu, T. (2010). “Behavior and modeling of confined high-strength concrete.” J. Compos. Constr., 249–259.
Zhang, T. (2014). “A generic mechanics approach for predicting shear strength of reinforced concrete beams.” Ph.D. thesis, Univ. of Adelaide, Adelaide, Australia.
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Published In
Journal of Composites for Construction
Volume 19 • Issue 6 • December 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Oct 9, 2014
Accepted: Feb 20, 2015
Published online: Mar 27, 2015
Discussion open until: Aug 27, 2015
Published in print: Dec 1, 2015
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