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http://dx.doi.org/10.12989/sem.2012.41.4.509

Strain distribution between CFRP strip and concrete at strengthened RC beam against shear  

Anil, Ozgur (Civil Engineering Department, Gazi University)
Bulut, Nalan (Civil Engineering Department, Gazi University)
Ayhan, Murat (Civil Engineering Department, Gazi University)
Publication Information
Structural Engineering and Mechanics / v.41, no.4, 2012 , pp. 509-525 More about this Journal
Abstract
In recent years, CFRP material usage in strengthening applications gradually became widespread. Especially, the studies on the strengthening of shear deficient reinforced concrete beams with CFRP strips are chosen as a subject to numerous experimental studies and research on this subject are increased rapidly. The most important variable, that is affected on the failure mode of CFRP strips and that is needed for determining the shear capacity of the strengthened reinforced concrete beams, is the strain distribution between CFRP strips and concrete. Numerous experimental studies are encountered in the literature about the determination of strain distribution between CFRP strips and concrete. However, these studies mainly focused on the CFRP strips under axial tension. There are very limited numbers of experimental and analytic studies examining the strain distribution between concrete and CFRP strips, which are under combined stresses due to the effects of shear force and bending moment. For this reason, existing experimental study in the literature is used as model for ANSYS finite element software. Nonlinear finite element analysis of RC beams strengthened against shear with CFRP strips under reverse cyclic loading is performed. The strain distributions between CFRP strips and concrete that is obtained from finite element analysis are compared with the results of experimental measurements. It is seen that the experimental results are consisted with the results derived from the finite element analysis and important findings on the strain distribution profile are reached by obtaining strain values of many points using finite element method.
Keywords
CFRP; Nonlinear Finite Element Analysis; ANSYS;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
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1 Anil, O. (2008), "Strengthening of RC T-section beams with low strength concrete using CFRP composites subjected to cyclic load", Constr. Build. Mater., 22, 2355-2368.   DOI   ScienceOn
2 Baran, A. and Anil, O. (2010), "Nonlinear finite element analysis of effective CFRP bonding length and strain distribution along concrete-CFRP interface", Comput. Concrete, 7(5), 427-453.
3 Chen, J.F. and Teng, J.G. (2001), "Anchorage strength models for FRP and steel plates bonded to concrete", J. Struct. Eng.-ASCE, 127(7), 784-791.   DOI   ScienceOn
4 Chen, J.F. and Teng, J.G. (2003), "Shear capacity of FRP strengthened RC beams: FRP debonding", Constr. Build. Mater., 17(1), 27-41.   DOI   ScienceOn
5 Ersoy, U. (2000), "Reinforced concrete", METU, Ankara.
6 Lu, X.Z., Ye, L.P., Teng, J.G. and Jiang, J.J. (2005a), "Meso-scale finite element model for FRP sheets-plates bonded to concrete", Eng. Struct., 27, 564-575.   DOI   ScienceOn
7 Lu, X.Z., Teng, J.G., Ye, L.P. and Jiang, J.J. (2005b), "Bond-slip models for FRP sheets-plates bonded to concrete", Eng. Struct., 27, 920-937.   DOI   ScienceOn
8 Mohamed Ali, M.S., Oehlers, D.J. and Bradford, M.A. (2001), "Shear peeling of steel plates bonded to the tension faces of RC beams", J. Struct. Eng.-ASCE, 127(12), 1453-1460.   DOI   ScienceOn
9 Mohamed Ali, M.S., Oehlers, D.J. and Bradford, M.A. (2002), "Interaction between flexure and shear on the debonding of RC beams retrofitted with compression face plates", Adv. Struct. Eng., 5(4), 223-230.   DOI   ScienceOn
10 Oehlers, D.J. and Moran, J.P. (1990), "Premature failure of externally plated reinforced concrete beams", J. Struct. Div.-ASCE, 116(4), 978-995.   DOI
11 Oehlers, D.J., Park, S.M. and Mohamed Ali, M.S. (2003), "A structural engineering approach to adhesive bonding longitudinal plates to RC beams and slabs", Compos. Part A, 34(12), 887-897.   DOI
12 Pham, H.B., Al-Mahaidi, R. and Saouma, V. (2006), "Modeling of CFRP-concrete bond using smeared and discrete cracks", Compos. Struct., 75, 145-150.   DOI
13 Smith, S.T. and Teng, J.G. (2002a), "FRP-strengthened RC beams-I: review of debonding strength models", Eng. Struct., 24(4), 385-395.   DOI   ScienceOn
14 Smith, S.T. and Teng, J.G. (2002b), "FRP-strengthened RC beams-II: assessment of debonding strength models", Eng. Struct., 24(4), 397-417.   DOI   ScienceOn
15 Smith, S.T. and Teng, J.G. (2003), "Shear-bending interaction in debonding failures of FRP-plated RC beams", Adv. Struct. Eng., 6(3), 183-199.   DOI   ScienceOn
16 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.   DOI   ScienceOn
17 Teng, J.G., Chen, J.F., Smith, S.T. and Lam, L. (2002), FRP-strengthened RC Structures, Chichester, Wiley.
18 William, K.J. and Warnke, E.P. (1974), "Constitutive model for the triaxial behavior of concrete", IABSE Report No.19, 19, 1-30.
19 Yao, J., Teng, J.G. and Chen, J.F. (2005), "Experimental study on FRP-to-concrete bonded joints", Compos. Part B-E., 36(4), 99-113.   DOI