FRP-Reinforced Concrete Beams: Unified Approach Based on IC Theory
Publication: Journal of Composites for Construction
Volume 15, Issue 3
Abstract
In general, steel-reinforced concrete involves a ductile steel material and a very strong and ductile bond between the steel reinforcement and concrete, so that debonding rarely governs the design. In contrast, fiber-reinforced polymer (FRP) reinforcement is a brittle material with a weak and brittle bond, making debonding a major issue. Consequently, there has been an extensive amount of research on FRP debonding and in particular intermediate crack (IC) debonding. This paper shows that the very good research by the FRP research community on the mechanics of IC debonding can be applied to a wide range of apparently disparate reinforced concrete behaviors to produce a unified approach. Hence, a single mechanism, or unified approach, based on IC debonding is proposed in this paper for dealing with moment rotation, tension stiffening and deflections, member ductility and moment redistribution, shear capacity, confinement, and fiber concrete for FRP RC beams.
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References
American Concrete Institute (ACI). (2008). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.” ACI 440.2R-08, Detroit.
Bischoff, P. H. (2003). “Tension stiffening and cracking of steel fiber-reinforced concrete.” J. Mater. Civ. Eng., 15(2), 174–182.
Chang, K. C., and Sung, H. C. (1996). “Tension stiffening model for planar reinforced concrete members.” Comput. Struct., 59(1), 179–190.
Comité Euro-International du Béton–Fédération Internationale de la Précontrainte (CEB-FIP). (1985). CEB manual-cracking and deformations, Swiss Federal Institute of Technology.
Comité Euro-International du Béton–Fédération Internationale de la Précontrainte (CEB-FIP). (1992). CEB-FIP Model Code 90, London.
Dai, J., Ueda, T., and Sato, Y. (2005). “Development of the nonlinear bond stress—Slip model of fiber reinforced plastics sheet—Concrete interfaces with a simple method.” J. Compos. Constr., 9(1), 52–62.
Daniell, J. E., Oehlers, D. J., Griffith, M. C., Mohamed Ali, M. S., and Ozbakkaloglu, T. (2008). “The softening rotation of reinforced concrete beams.” Eng. Struct., 30, 3159–3166.
David, Z. Y., Mahmood, J., and Amir, D. A. (2008). “One dimensional analysis of tension stiffening in reinforced concrete with discrete cracks.” Eng. Struct., 30, 206–217.
De Lorenzis, L., and Nanni, A. (2002). “Bond between near-surface mounted fiber-reinforced polymer rods and concrete in structural strengthening.” ACI Struct. J., 99(2), 123–132.
Eligehausen, R., Popov, E. P., Bertero, V. V. (1983). “Local bond stress-slip relationship of deformed bars under generalized excitations.” Rep. No. UCB/EERC83/23, Pacific Earthquake Engineering Research Center, Berkeley, CA.
European Committee for Standardization (CEN). (1992). Eurocode 2, Design of concrete structures, Part 1-1: General rules and rules for buildings, ENV 1992-1-1:1991.
Fam, A. Z., and Rizkalla, S. H. (2001). “Confinement model for axially loaded concrete confined by circular fibre-reinforced polymer tubes.” ACI Struct. J., 98(4), 451–461.
Fantili, P. A., Mihashi, H., and Vallini, P. (2007). “Crack profile in R/C, R/FRCC and R/HPFRCC members in tension.” Mater. Struct., 40, 1099–1114.
Fantili, P. A., Mihashi, H., and Vallini, P. (2009). “Multiple cracking and strain hardening in fiber-reinforced concrete under uniaxial tension.” Cem. Concr. Res., 39, 1217–1229.
Farrall, J., Kotomski, R., Paterson, L., and Visintin, P. (2008). “Moment rotation of confined beams.” Final year research rep., School of Civil, Environmental and Mining Engineering, Univ. of Adelaide.
Fédération Internationale du Béton (FIB). (2001). “Design and use of externally bonded fibre reinforced polymer reinforcement (FRP EBR) for reinforced concrete structures.” FIB Bulletin 14: Externally bonded FRP reinforcement for RC structures, Task Group 9.3, Lausanne, Switzerland.
Gilbert, R. I. (2007). “Tension stiffening in lightly reinforced concrete slabs.” J. Struct. Eng., 133(6), 899–903.
Griffith, M. C., Wu, Y. F., and Oehlers, D. J. (2005). “Behaviour of steel plated RC columns subject to lateral loading.” Adv. Struct. Eng., 8(4), 333–347.
Harajli, M. H., Hamad, B. S., and Rteil, A. A. (2004). “Effect of confinement of bond strength between steel bars and concrete.” ACI Struct. J., 101(5), 595–603.
Haskett, M., Mohamed Ali, M. S., Oehlers, D. J., and Wu, C. (2009a). “Influence of bond on the hinge rotation of FRP plated beams.” Adv. Struct. Eng., 12(6), 833–843.
Haskett, M., Oehlers, D. J., and Mohamed Ali, M. S. (2008). “Local and global bond characteristics of steel reinforcing bars.” Eng. Struct., 30(2), 376–383.
Haskett, M., Oehlers, D. J., and Mohamed Ali, M. S. (2010a). “Design for moment redistribution in RC beams retrofitted with steel plates.” Adv. Struct. Eng., 13(2), 379–391.
Haskett, M., Oehlers, D. J., Mohamed Ali, M. S., and Sharma, S. K. (2010b). “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 Wu, C. (2009b). “Rigid body moment-rotation mechanism for reinforced concrete beam hinges.” Eng. Struct., 31(5), 1032–1041.
Haskett, M., Oehlers, D. J., Mohamed Ali, M. S., and Wu, C. (2009c). “Yield penetration hinge rotation in reinforced concrete beams.” J. Struct. Eng., 135(2), 130–138.
Haskett, M., Oehlers, D. J., Mohamed Ali, M. S., and Wu, C. (2010c). “Analysis of moment redistribution in FRP plated RC beams.” J. Compos. Constr., 14(4), 424–433.
Jenson, B. C. (1975). “Line of discontinuity for displacements in the theory of plasticity of plain and reinforced concrete.” Mag. Concr. Res., 27(92), 143–150.
Jungwirth, J., and Muttoni, A. (2004). “Structural behaviour of tension members in ultra high performance concrete.” Int. Symp. on UHPC 2004, Kassel, Germany.
Lam, L., and Teng, J. G. (2004). “Ultimate condition of fibre reinforced polymer-confined concrete.” J. Compos. Constr., 8(6), 539–548.
Lu, X. J., 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.
Lucas, W., Oehlers, D. J., and Mohamed Ali, M. S. (2011a). “The formulation of a shear resistance mechanism for inclined cracks in RC beams.” J. Struct. Eng., in press.
Lucas, W., Oehlers, D. J., Mohamed Ali, M. S., and Griffith, M. C. (2011b). “The FRP reinforced concrete shear-friction mechanism.” Adv. Struct. Eng., in press.
Malvar, L. (1995). “Tensile and bond properties of GFRP reinforcing bars.” ACI Mater. J., 92(3), 276–285.
Marti, P., Alvarez, M., Kaufmann, W., and Sigrist, V. (1998). “Tension chord model for structural concrete.” Struct. Eng. Int., 287–298.
Mattock, A. H. (1974). “Shear transfer in concrete having reinforcement at an angle to shear plane.” ACI Publication SP-42, Shear in Reinforced Concrete, 17–42.
Mattock, A. H., and Hawkins, N. M. (1972). “Shear transfer in reinforced concrete recent research.” PCI J., 17(2), 55–75.
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.
Mohamed Ali, M. S., Oehlers, D. J., Griffith, M. C., and Seracino, R. (2008). “Interfacial stress transfer of near surface mounted FRP-to-concrete joints.” Eng. Struct., 30(7), 1861–1868.
Muhamad, R., Mohamed Ali, M. S., Oehlers, D. J., and Sheikh, A. H. (2011). “Load-slip relationship of tension reinforcement in reinforced concrete members.” Eng. Struct., 33(4), 1098–1106.
Oehlers, D. J. (2007). “Teaching the fundamental principles in reinforced concrete design.” Aust. J. Struct. Eng., 7(3), 99–108.
Oehlers, D. J., Griffith, M. C., and Mohamed Ali, M. S. (2009). “Ductility components and limits of FRP plated RC structures.” Constr. Build. Mater., 23(4), 1538–1543.
Oehlers, D. J., Mohamed Ali, M. S., and Griffith, M. C. (2008a). “Concrete component of the rotational ductility of reinforced concrete flexural members.” Adv. Struct. Eng., 11(3), 293–303.
Oehlers, D. J., Rashid, R., and Seracino, R. (2008b). “IC debonding resistance of groups of FRP NSM strips in reinforced concrete beams.” Constr. Build. Mater., 22(7), 1574–1582.
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, London.
Oehlers, D. J., Seracino, R., and Smith, S. (2008c). “Design guideline for RC structures retrofitted with FRP and metal plates—Beams and slabs.” Standards Australia HB 305, SAI Global Limited, Sydney, Autralia.
Rashid, R., Oehlers, D. J., and Seracino, R. (2008). “IC debonding of FRP NSM and EB retrofitted concrete: Plate and cover interaction tests.” J. Compos. Constr., 12(2), 160–167.
Redaelli, D., and Muttoni, A. (2007). “Tensile behaviour of reinforced ultra high performance fiber reinforced concrete elements.” Symp. Dubrovnik 2007: Concrete Structures—Simulations of Development, Fédération Internationale du Béton, Dubrovnik, Croatia.
Seracino, R., Jones, N. M., Mohammed Ali, M. S, Page, M. W., and Oehlers, D. J. (2007). “Bond strength of near-surface mounted FRP-to-concrete joints.” J. Compos. Constr., 11(4), 401–409.
Schumacher, P. Walraven, J. C., Den Uijl, J. A., Bigaj-van Vliet, A. (2009). “Rotation capacity of self-compacting steel fibre reinforced concrete beams.” Heron, 54 (2–3), 127.
Suwannakarn, S. W. (2009). “Postcracking characteristics of high performance fiber reinforced cementitious composites.” Ph.D. thesis, Univ. of Michigan.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2002). FRP strengthened RC structures, Wiley, London.
Walraven, J. C. (1981). “Fundamental analysis of aggregate interlock.” J. Struct. Div., 107(11), 2245–2270.
Walraven, J., Frenay, J., and Pruijssers, A. (1987). “Influence of concrete strength and load history on the shear friction capacity of concrete members.” PCI J., 32(1), 66–84.
Walraven, J. C., and Reinhardt, H. W. (1981). “Theory and experiments on mechanical behaviour of cracks in plain and reinforced concrete subjected to shear loading.” Heron, 26(1A), 1–68.
Wu, C. Q., et al. (2007). “Blast testing of RC slabs with NSM CFRP plates.” Adv. Struct. Eng., 10(4), 397–414.
Wu, H. Q., and Gilbert, R. I. (2009). “Modelling short term tension stiffening in reinforced concrete prisms using a continuum-based finite element model.” Eng. Struct., 31(10), 2380–2391.
Wu, Y. F., Liu, T., and Oehlers, D. J. (2006). “Fundamental principles that govern retrofitting of reinforced concrete columns by steel and FRP jacketing.” Adv. Struct. Eng., 9(4), 507–533.
Yuan, H., Teng, J. G., Seracino, R., Wu, Z. S., and Yao, J. (2004). “Full-range behavior of FRP-to-concrete bonded joints.” Eng. Struct., 26(5), 553.
Yuguang, Y., Walraven, J. C., and Uijl, J. A. (2009). “Combined effect of fibers and steel rebars in high performance concrete.” Heron, 54(2–3). 205–224.
Zhang, J. P. (1997). “Diagonal cracking and shear strength of reinforced concrete beams.” Mag. Concr. Res., 49(178), 55–65.
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Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 3 • June 2011
Pages: 293 - 303
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Mar 22, 2010
Accepted: Sep 16, 2010
Published online: Sep 18, 2010
Published in print: Jun 1, 2011
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