Deflection of reinforced concrete beams strengthened with CFRP

Tomas Skuturna, Mykolas Daugevičius, Juozas Valivonis

Abstract


This paper presents the results of an experimental study to investigate the deflection of reinforced concrete beams strengthened with external CFRP reinforcement. The influence of anchoring of external reinforcement was investigated. CFRP reinforcement was anchored in three different ways. Steel clamps, fibre wraps and steel pins were used for anchoring. Also different prepressing levels and different areas of steel clamps were used. The analysis of results of experimental research shows that anchoring of external reinforcement affects the performance and deflection of the strengthened reinforced concrete beams.


Keywords:
reinforced concrete beams, strengthening, CFRP, deflection

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References


Bank, L. C.; Arora, D., 2007. Analysis and design of RC beams with mechanically fastened FRP (MF-FRP) strips. Composite Structures, 79(2), pp. 180–191. http://dx.doi.org/10.1016/j.compstruct.2005.12.001

Biolzi, L.; Ghittoni, C.; Fedele, R.; Rosati, G., 2013. Experimental and theoretical issues in FRP–concrete bonding. Construction and Building Materials, 41, pp. 182–190. http://dx.doi.org/10.1016/j.conbuildmat.2012.11.082

Bulavs, F.; Radinsh, I.; Tirans, N., 2005. Improvement of capacity in bending by the use of FRP layers on RC beams. Journal of Civil Engineering and Management, 11(3), pp. 169–174. http://dx.doi.org/10.1080/13923730.2005.9636347

Buyukozturk, O.; Gunes, O.; Karaca, E., 2004. Progress on understanding debonding problems in reinforced concrete and steel members strengthened using FRP composites. Construction and Building Materials, 18(1), pp. 9–19. http://dx.doi.org/10.1016/S0950-0618(03)00094-1

Camli, U. S.; Binici, B., 2007. Strength of carbon fiber reinforced polymers bonded to concrete and masonry. Construction and Building Materials, 21(7), pp. 1431-1446. http://dx.doi.org/10.1016/j.conbuildmat.2006.07.003

Casas, J. R.; Pascual, J., 2007. Debonding of FRP in bending: simplified model and experimental validation. Construction and Building Materials, 21(10), pp. 1940-1949. http://dx.doi.org/10.1016/j.conbuildmat.2006.05.055

Ceroni, F.; Pecce, M., 2007. Cracking behaviour of RC beams externally strengthened with emerging materials. Construction and Building Materials, 21(4), pp. 736–745. http://dx.doi.org/10.1016/j.conbuildmat.2006.06.013

Chahrour, A.; Soudki, K., 2005. Flexure response of reinforced concrete beams strengthened with end anchored partially bonded carbon fiber reinforced polymer strips. Journal of Composites for Construction, 9(2), pp. 170–177. http://dx.doi.org/10.1061/(ASCE)1090-0268(2005)9:2(170)

Chen, J. F.; Pan, W. K., 2006. Three dimensional stress distribution in FRP-to-concrete bond test specimens. Construction and Building Materials, 20(1–2), pp. 46–58. http://dx.doi.org/10.1016/j.conbuildmat.2005.06.037

Dai, J.; Ueda, T.; Sato, Y., 2005. Development of the nonlinear bond stress–slip model of fiber reinforced plastics sheet–concrete interfaces with a simple method. Journal of Composites for Construction, 9(1), pp. 52–62. http://dx.doi.org/10.1061/(ASCE)1090-0268(2005)9:1(52)

David, E.; Ragneau, E.; Buyle-Bodin, F., 2003. Experimental analysis of flexural behaviour of externally bonded CFRP reinforced concrete structures. Materials and Structures, 36(4), pp.238–241. http://dx.doi.org/10.1007/BF02479617

Duthinh, D.; Starnes, M., 2004. Strength and ductility of concrete beams reinforced with carbon fiber reinforced polymer plates and steel. Journal of Composites for Construction, 8(1), pp. 59–69. http://dx.doi.org/10.1061/(ASCE)1090-0268(2004)8:1(59)

Ekenel, M.; Rizzo, A.; Myers, J. J.; Nanni, A., 2006. Flexural fatigue behavior of reinforced concrete beams strengthened with FRP fabric and precured laminate systems. Journal of Composites for Construction, 10(5), pp. 433–442. http://dx.doi.org/10.1061/(ASCE)1090-0268(2006)10:5(433)

Fayyadh, M. M.; Razak, H. A., 2012. Assessment of effectiveness of CFRP repaired RC beams under different damage levels based on flexural stiffness. Construction and Building Materials, 37, pp. 125–134. http://dx.doi.org/10.1016/j.conbuildmat.2012.07.021

Ferracuti, B.; Savoia, M.; Mazzotti, C., 2007. Interface law for FRP–concrete delamination. Composite Structures, 80(4), pp. 523–531. http://dx.doi.org/10.1016/j.compstruct.2006.07.001

Ferrier, E.; Avril, S.; Hamelin, P.; Vautrin, A. 2006. Mechanical behavior of RC beams reinforced by externally bonded CFRP sheets. Materials and Structure, 36(8), pp. 522–529. http://dx.doi.org/10.1007/BF02480829

Ferrier, E.; Hamelin, P., 2002. Long-time concrete-composite interface characterization for reliability prediction of RC beam strengthened with FRP. Materials and Structures 35(9), pp. 564–572. http://dx.doi.org/10.1007/BF02483125

Freddi, F.; Savoia, M., 2008. Analysis of FRP–concrete debonding via boundary integral equations. Engineering Fracture Mechanics, 75(6), pp. 1666–1683. http://dx.doi.org/10.1016/j.engfracmech.2007.05.016

Hajsadeghi, M.; Alaee, F. J.; Shahmohammadi, A., 2011. Investigation on behaviour of square/rectangular reinforced concrete columns retrofitted with FRP jacket. Journal of Civil Engineering and Management, 17(3), pp. 400–408. http://dx.doi.org/10.3846/13923730.2011.594155

Harries, K. A.; Reeve, B.; Zorn, A., 2007. Experimental evaluation of factors affecting monotonic and fatigue behavior of FRP to concrete bond. ACI Structures Journal 104(6), pp. 667–674.

Heffernan, P. J.; Erki, M. A., 2004. Fatigue behavior of reinforced concrete beams strengthened with carbon fiber reinforced plastic laminates, Journal of Composites for Construction, 8(2), pp. 132–140. http://dx.doi.org/10.1061/(ASCE)1090-0268(2004)8:2(132)

Hsu, C. T. T.; Punurai, W.; Bian, H.; Jia, Y., 2003. Flexural strengthening of reinforced concrete beams using carbon fibre reinforced polymer strips. Magazine of Concrete Research, 55(3), pp. 279–288. http://dx.doi.org/10.1680/macr.2003.55.3.279

Iovinella, I.; Prota, A.; Mazzotti, C., 2013.Influence of surface roughness on the bond of FRP laminates to concrete. Construction and Building Materials, 40, pp. 533–542. http://dx.doi.org/10.1016/j.conbuildmat.2012.09.112

Lamanna, A. J.; Bank, L. C.; Scott, D. W., 2004. Flexural strengthening of RC beams by mechanically attaching FRP Strips, Journal of Composites for Construction, 8(3), pp. 203–210. http://dx.doi.org/10.1061/(ASCE)1090-0268(2004)8:3(203)

Li, L.; Guo, Y.; Liu, F., 2008. Test analysis for FRC beams strengthened with externally bonded FRP sheets. Construction and Building Materials, 22(3), pp. 315–323.

http://dx.doi.org/10.1016/j.conbuildmat.2006.08.016

Lu, X. Z.; Jiang, J. J.; Teng, J. G.; Ye, L. P., 2006. Finite element simulation of debonding in FRP-to-concrete bonded joints, Construction and Building Materials, 20(6), pp. 412–424. http://dx.doi.org/10.1016/j.conbuildmat.2005.01.033

Mazzotti, C.; Savoia, M.; Ferracuti, B., 2008. An experimental study on delamination of FRP plates bonded to concrete, Construction and Building Materials, 22(7), pp. 1409-1421. http://dx.doi.org/10.1016/j.conbuildmat.2007.04.009

Mostofinejad, D.; Shameli, S. M., 2013. Externally bonded reinforcement in grooves (EBRIG) technique to postpone debonding of FRP sheets in strengthened concrete beams. Construction and Building Materials, 38, pp. 751–758. http://dx.doi.org/10.1016/j.conbuildmat.2012.09.030

Niu, H.; Wu, Z., 2006. Effects of FRP concrete interface bond properties on the performance of RC beams strengthened in flexure with externally bonded FRP sheets. Journal of Materials in Civil Engineering, 18(5), pp. 723–731. http://dx.doi.org/10.1061/(ASCE)0899-1561(2006)18:5(723)

Pan, J.; Leung, C. K. Y., 2007 a. Debonding along the FRP–concrete interface under combined pulling/peeling effects. Engineering Fracture Mechanics, 74(1-2), pp. 132–150. http://dx.doi.org/10.1016/j.engfracmech.2006.01.022

Pan, J.; Leung, C. K. Y., 2007 b. Effect of concrete composition on frp concrete bond capacity. Journal of Composites for Construction, 11(6), pp. 611–618. http://dx.doi.org/10.1061/(ASCE)1090-0268(2007)11:6(611)

Perera, R.; Recuero, A.; De Diego, A.; Lopez, C., 2004. Adherence analysis of fiber-reinforced polymer strengthened RC beams. Computers & Structures, 82(23-26), pp. 1865–1873. http://dx.doi.org/10.1016/j.compstruc.2004.03.060

Pham, H. B.; Al-Mahaidi, R.; Saouma, V., 2006. Modelling of CFRP–concrete bond using smeared and discrete cracks. Composite Structures, 75(1–4), pp. 145–150.

http://dx.doi.org/10.1016/j.compstruct.2006.04.039

Pham, H. B.; Al-Mahaidi, R., 2007. Modelling of CFRP-concrete shear-lap tests. Construction and Building Materials, 21(4), pp. 727–735. http://dx.doi.org/10.1016/j.conbuildmat.2006.06.012

Ramos, G.; Casas, J. R.; Alarcón, A., 2004. Repair and strengthening of segmental bridges using carbon fibers, Engineering Structures, 26(5), pp. 609–618.

http://dx.doi.org/10.1016/j.engstruct.2003.12.008

Ramos, G.; Casas, J. R.; Alarcon, A., 2006. Normalized test for prediction of debonding failure in concrete elements strengthened with CFRP. Journal of Composites for Construction, 10(6), pp. 509–519. http://dx.doi.org/10.1061/(ASCE)1090-0268(2006)10:6(509)

Saxena, P.; Toutanji, H.; Noumowe, A., 2008. Failure analysis of FRP strengthened RC beams. Journal of Composites for Construction, 12(1), pp. 2–14. http://dx.doi.org/10.1061/(ASCE)1090-0268(2008)12:1(2)

Schilde, K.; Seim, W., 2007. Experimental and numerical investigations of bond between CFRP and concrete. Construction and Building Materials, 21(4), pp.709–726. http://dx.doi.org/10.1016/j.conbuildmat.2006.06.006

Skuturna, T.; Valivonis, J.; Vainiūnas, P.; Marčiukaitis, G.; Daugevičius, M., 2008. Analysis of deflections of bridge girders strengthened by carbon fiber reinforcement. The Baltic Journal of Road and Bridge Engineering, 3(3), pp. 145–151. http://dx.doi.org/10.3846/1822-427X.2008.3.145-151

Smith, S. T.; Teng, J. G., 2002a. FRP-strengthened RC beams. I: review of debonding strength models. Engineering Structures, 24(4), pp.385–395. http://dx.doi.org/10.1016/S0141-0296(01)00105-5

Smith, S. T.; Teng, J. G., 2002b. FRP-strengthened RC beams. II: assessment of debonding strength models. Engineering Structures, 24(4), pp. 397–417. http://dx.doi.org/10.1016/S0141-0296(01)00106-7

Subramaniam, K. V.; Carloni, C.; Nobile, L., 2007. Width effect in the interface fracture during shear debonding of FRP sheets from concrete. Engineering Fracture Mechanics, 74(4), pp. 578–594. http://dx.doi.org/10.1016/j.engfracmech.2006.09.002

Thomsen, H.; Spacone, E.; Limkatanyu, S.; Camata, G., 2004. Failure mode analyses of reinforced concrete beams strengthened in flexure with externally bonded fiber-reinforced polymers. Journal of Composites for Construction, 8(2), pp. 123–131. http://dx.doi.org/10.1061/(ASCE)1090-0268(2004)8:2(123)

Trapko, W.; Trapko, T., 2012. Load-bearing capacity of compressed concrete elements subjected to repeated load strengthened with CFRP materials. Journal of Civil Engineering and Management, 18(2), pp. 590–599. http://dx.doi.org/10.3846/13923730.2012.701664

Ueda, T.; Jianguo, D., 2005. Interface bond between FRP sheets and concrete substrates: properties, numerical modeling and roles in member behaviour. Progress in Structural Engineering and Materials, 7(1), pp. 27–43. http://dx.doi.org/10.1002/pse.187

Valivonis, J.; Skuturna, T., 2007. Cracking and strength of reinforced concrete structures in flexure strengthened with carbon fibre laminates. Journal of Civil Engineering and Management, 13(4), pp. 317–323.

Wang, Y. C.; Lee, M. G.; Chen, B. C., 2007. Experimental study of FRP-strengthened RC bridge girders subjected to fatigue loading. Composite Structures, 81(2), pp. 491–498. http://dx.doi.org/10.1016/j.compstruct.2006.09.012

Xie, J.; Hu, R., 2013. Experimental study on rehabilitation of corrosion–damaged reinforced concrete beams with carbon fiber reinforced polymer. Construction and Building Materials, 38, pp. 708–716. http://dx.doi.org/10.1016/j.conbuildmat.2012.09.023

Yail, J.; Kim, Y.J.; Hossain, M.; Zhang, J., 2013. A probabilistic investigation into deterioration of CFRP–concrete interface in aggressive environments. Construction and Building Materials, 41, pp. 49–59. http://dx.doi.org/10.1016/j.conbuildmat.2012.11.101

Yuan, H.; Teng, J. G.; Seracino, R.; Wu, Z. S.; Yao, J., 2004. Full-range behavior of FRP-to-concrete bonded joints. Engineering Structures, 26(5), pp. 553–565. http://dx.doi.org/10.1016/j.engstruct.2003.11.006




DOI: 10.7250/iscconstrs.2014.29

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