Fiber-Reinforced-Cementitious-Composites Plate for Anchoring FRP Sheet on Concrete Member
Publication: Journal of Composites for Construction
Volume 15, Issue 5
Abstract
To improve the fiber-reinforced polymer (FRP)/concrete bond capacity, this paper presents a new anchoring approach with the gluing of precast fiber-reinforced cementitious composites (FRCC) plate on top of the FRP sheets. In order to measure the improvement in ultimate load and deformation capacity and to study the failure mechanisms around the anchored area, the direct shear bond test is performed on concrete prisms with bonded FRP. Several sets of tests have been carried out with anchoring plates of different FRCC compositions and lengths. Comparison with the control sample shows that the installation of FRCC plate can significantly increase both the bond and deformation capacities (by up to 100%). On the basis of the shear bond test, two types of FRCC plate materials were found to be particularly effective and were selected for strengthening of beam members to be tested under four-point bending. Comparison with control members (without anchor) and those with conventional U-shaped FRP anchors indicates that both the ultimate load and central deflection can be improved by the new anchoring method.
Get full access to this article
View all available purchase options and get full access to this article.
References
Brosens, K., and van Gemert, D. (1997). “Anchoring stresses between concrete and carbon fiber reinforced laminates.” Non-metallic (FRP) Reinforcement for Concrete Structures, Proc., 3rd Int. Symp., Sapporo, Japan, 271–278.
Ceroni, F. (2010). “Experimental performances of RC beams strengthened with FRP materials.” Constr. Build. Mater., 24(9), 1547–1559.
Chen, J. F., and Teng, J. G. (2001). “Anchorage strength mode for FRP and steel plates bonded to concrete.” J. Struct. Eng., 127(1), 784–791.
Cheung, A. K. F., and Leung, C. K. Y. (2008). “Experimental study on the bond between steel reinforcement and self-compacting high strength fiber reinforced cementitious composites.” Proc., 7th Int. RILEM Symp. on Fibre Reinforced Concrete: Design and applications BEFIB, RILEM, Chennai, India, 667–678.
Eshwar, N., Nanni, A., and Ibell, T. J. (2008). “Performance of two anchor systems of externally bonded fiber-reinforced polymer laminates.” ACI Mater. J., 105(1), 72–80.
Galati, D., and De Lorenzis, L. (2009). “Effect of construction details on the bond performance of NSM FRP bars in concrete.” Adv. Struct. Eng., 12(5), 683–700.
Garden, H. N., and Hollaway, L. C. (1998). “An experimental study of the influence of plate end anchorage of carbon fiber composite plates used to strengthen reinforced concrete beams.” Compos. Struct., 42(2), 175–188.
Hiroyuki, Y., and Wu, Z. (1997). “Analysis of debonding fracture properties of CFS strengthened member subject to tension.” Non-Metallic (FRP) Reinforcement for Concrete Structures, Proc., 3rd Int. Symp., Japan Concrete Inst., Sapporo, Japan, 287–294.
Khalifa, A., and Nanni, A. (2000). “Improving shear capacity of existing RC -section beams using CFRP composites.” Cem. Concr. Compos., 22, 165–174.
Kobataka, Y., Kimura, K., and Katsumata, H. (1993). “A retrofitting method for reinforced concrete structures using carbon fiber.” Fiber reinforced plastic reinforcement for concrete structures: Properties and applications, A. Nanni, ed., Elsevier, Amsterdam, 435–450.
Lee, S., Leung, C. K. Y., Chen, Z., Xu, M., and Tang, J. M. (2004). “Design guidelines for strengthening concrete structures using externally bonded fiber reinforced plastic systems.” HKUST Advanced Engineering Materials Facility Research Rep.
Leung, C. K. Y. (2001). “Delamination failure in concrete beams retrofitted with a bonded plate.” J. Mater. Civ. Eng., 13, 106–113.
Leung, C. K. Y. (2006). “FRP debonding from a concrete substrate: Some recent findings against conventional belief.” Cem. Concr. Compos., 28, 742–748.
Leung, C. K. Y., and Cao, Q. (2009). “Development of strain hardening permanent formwork for durable concrete structures.” Mater. Struct., 43(7), 993–1007.
Li, Z, Leung, C. K. Y., and Xi, Y. (2009). Structural renovation in concrete, Taylor and Francis, Oxon, U.K.
Neuner, J., and Falabella, R. (1996). “Composite anchor system: Flatwise tensile and shear testing.” Internal Rep., Hexcel, Stamford, CT
Nguyen, D. M., Chan, T. K., and Cheong, H. K. (2001). “Brittle failure and bond development length of CFRP-concrete beams.” J. Compos. Constr., 5(1), 12–17.
Niemitz, C. W., James, R., and Berña, S. F. (2010). “Experimental behavior of carbon fiber-reinforced polymer (CFRP) sheets attached to concrete surfaces using CFRP anchors.” J. Compos. Constr., 12(2), 185–194.
Oehlers, D. J., Liu, I. S. T., and Seracino, R. (2005). “Shear deformation debonding of adhesively bonded plates.” Proc. Inst. Civ. Eng., 158(1), 77–84.
Orton, S. L., Jirsa, J. O., and Beyrak, O. (2008). “Design considerations of carbon fiber anchors.” J. Compos. Constr., 12(6), 608–616.
Özdemir, G. (2005). “Mechanical properties of CFRP anchorages.” Master of Science thesis, Middle East Tech. Univ., Istanbul, Turkey.
Pan, J. L., and Leung, C. K. Y. (2007). “Effect of concrete composition on FRP/concrete bond capacity.” J. Compos. Constr., 11(6), 611–618.
Rahimi, H., and Hutchinson, A. (2001). “Concrete beams strengthened with externally bonded FRP plates.” J. Compos. Constr., 5(1), 44–56.
Ritchie, P. A., Thomas, D. A., Lu, L. W., and Connelly, G. M. (1991). “External reinforcement of concrete beams using fiber reinforced plastic.” ACI Struct. J., 88(4), 490–500.
Smith, S. T., and Teng, J. G. (2001). “Debonding failures in FRP-plated RC Beams with or without U strip end anchorage.” Proc., FRP Composites in Civil Engineering, 1, 607–615.
Täljsten, B. (1994). “Plate bonding. Strengthening of existing concrete structures with epoxy bonded plates of steel or fibre reinforced plastics.” Ph.D. thesis, University of Technology, Luleá, Sweden.
Täljsten, B. (1997). “Strengthening of beams by plate bonding.” J. Mater. Civ. Eng., 9(4), 206–212.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2002). FRP strengthened RC structures, Wiley, West Sussex, U.K.
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.
Yao, J., and Teng, J. G. (2007). “Plate end debonding in FRP-plated RC beams—I: Experiments.” Eng. Struct., 29(10), 2457–2471.
Yao, J., Teng, J. G., and Lam, L. (2005). “Experimental study on intermediate crack debonding in FRP-strengthened RC flexural members.” Adv. Struct. Eng., 8(4), 365–396.
Ziraba, Y. N., Baluch, M. H., Basunbul, I. A., Sharif, A. M., Azad, A. K., and Al-Sulaimani, G. J. (1994). “Guideline towards the design of reinforced concrete beams with external plates.” ACI Struct. J., 91(6), 639–646.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 5 • October 2011
Pages: 790 - 798
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Aug 31, 2010
Accepted: Feb 9, 2011
Published online: Feb 11, 2011
Published in print: Oct 1, 2011
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.