Quantification of Bond-Slip Relationship for Externally Bonded FRP-to-Concrete Joints
Publication: Journal of Composites for Construction
Volume 17, Issue 5
Abstract
The interfacial bond parameters are quantified and modeled in this work through experimental and analytical studies. A database comprising 628 shear tests of externally-bonded fiber reinforced polymer (FRP) joints is built for model development. A newly derived closed-form solution is used for identification of bond parameters by matching the analytical solution with test results. Factors that affect the bond parameters are identified and configurations of the models are determined through analytical reasoning. Coefficients of the models are subsequently derived by regression analyses. It is found that the FRP-to-concrete width factor, which has been modeled as a function of FRP-to-concrete width ratio only in all existing bond strength models, should also be a function of concrete strength. A new model for the width factor as a function of both the width ratio and concrete strength is developed, which leads to more accurate and rational bond strength and fracture energy models.
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Acknowledgments
The work described in this paper was fully supported by a grant from CityU (Project No. 6351015). Undergraduate students Li Yuk Tung, Wong Wai Sing, and Luk Kam Chuen undertook the experimental tests as their final year project. Their significant contributions to work are acknowledged.
References
Abdel Baky, H., Ebead, U., and Neale, K. W. (2012). “Nonlinear micromechanics-based bond–slip model for FRP/concrete interfaces.” Eng. Struct., 39, 11–23.
Ali-Ahmad, M., Subramaniam, K., and Ghosn, M. (2006). “Experimental investigation and fracture analysis of debonding between concrete and FRP sheets.” J. Eng. Mech., 132(9), 914–923.
ASTM. (1995). “Standard test method for tensile properties of polymer matrix composite materials.” D3039/D3039M-95, West Conshohocken, PA.
Bilotta, A., Di Ludovico, M., and Nigro, E. (2011). “FRP-to-concrete interface debonding: Experimental calibration of a capacity model.” Compos. B Eng., 42(6), 1539–1553.
Bizindavyi, L., and Neale, K. W. (1999). “Transfer lengths and bond strengths for composites bonded to concrete.” J. Compos. Constr., 3(4), 153–160.
Brosens, K., and Van Gemert, D. (1999). “Anchorage design for externally bonded carbon fiber reinforced polymer laminates.” Proc., 4th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, SP-188, American Concrete Institute, Farmington Hills, MI, 635–645.
Chajes, M. J., Finch, W. W. Jr, Januszka, T. F., and Thomson, T. A. Jr (1996). “Bond and force transfer of composite-material plates bonded to concrete.” ACI Struct. J., 93(2), 208–217.
Chen, J. F., and Teng, J. G. (2001). “Anchorage strength models for FRP and steel plates bonded to concrete.” J. Struct. Eng., 127(7), 784–791.
Dai, J. G. (2003). “Interfacial models for fiber reinforced polymer (FRP) sheets externally bonded to concrete.” Ph.D. thesis, Hokkaido Univ., Hokkaido, Japan.
Dai, J. G., Sato, Y., and Ueda, T. (2002). “Improving the load transfer and effective bond length for FRP composites bonded to concrete.” Proc. Jap. Concr. Inst., 24(1), 1423–1428.
Dai, J. G., 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.
Dai, J. G., Ueda, T., and Sato, Y. (2006). “Unified analytical approaches for determining shear bond characteristics of FRP-concrete interfaces through pullout tests.” J. Adv. Concr. Technol., 4(1), 133–145.
Ebead, U. A., Neale, K. W., and Bizindavyi, L. (2004). “On the interfacial mechanics of FRP-strengthened concrete structures.” Proc., 2nd Int. Conf. on FRP Composites in Civil Engineering, CICE-2004, R. Seracino, ed., Adelaide, Australian, Balkema Publications, Rotterdam, Netherlands, 351–359.
Girgin, C. Z., Nihal, A., and Ergin, A. (2007). “Evaluation of strength criteria for very-high-strength concretes under triaxial compression.” ACI Struct. J., 104(3), 277–283.
Guo, Z. G., Cao, S. Y., Sun, W. M., and Lin, X. Y. (2005). “Experimental study on bond stress-slip behaviour between FRP sheets and concrete.” Proc., Int. Symp. on Bond Behaviour of FRP in Structures, BBFS-2005, J. F. Chen and J. G. Teng, eds., International Institute for FRP in Construction (IIFC), Hong Kong, 77–83.
Hiroyuki, Y., and Wu, Z. S. (1997). “Analysis of debonding fracture properties of CFS strengthened member subject to tension.” Proc., 3rd Int. Symp. on Non-metallic (FRP) Reinforcement for Concrete Structures, Vol. 1, Japan Concrete Institute, Tokyo, 287–294.
Holzenkämpfer, P. (1994). “Ingenieur modelle des verbundes geklebter bewehrung für betonbauteile.” Ph.D. thesis, TU Braunschweig, Germany (in German).
Japan Concrete Institute (JCI). (2003). “Technical report of technical committee on retrofit technology.” Proc., Int. Symp. on Latest Achievement of Technology and Research on Retrofitting Concrete Structures, Japan Concrete Institute (JCI), Tokyo, Japan.
Kamiharako, A., Shimomura, T., Maruyama, K., and Nishida, H. (1999). “Analysis of bond and debonding behavior of continuous fiber sheet bonded on concrete.” J. Mater. Concr. Struct. Pavement, 634(45), 197–208 (in Japanese).
Khalifa, A., Gold, W. J., Nanni, A., and Abdel Aziz, M. (1998). “Contribution of externally bonded FRP to shear capacity of flexural members.” J. Compos. Constr., 2(4), 195–203.
Liu, K. (2011). “Computational modeling, experimental and theoretical study on bond behaviors of hybrid-bonded FRP strengthened concrete structures.” Ph.D. thesis, City Univ. of Hong Kong, Hong Kong.
Liu, K., and Wu, Y. F. (2012). “Analytical identification of bond–slip relationship of EB-FRP joints.” Composites Part B, 43(4), 1955–1963.
Lu, X. Z., Teng, J. G., Ye, L. P., and Jiang, J. J. (2005). “Bond–slip models for FRP sheets/plates bonded to concrete.” Eng. Struct., 27(6), 920–937.
Maeda, T., Asano, Y., Sato, Y., Ueda, T., and Kakuta, Y. (1997). “A study on bond by mechanism of carbon fiber sheet.” Proc., 3rd Int. Symp. on Non-metallic (FRP) Reinforcement for Concrete Structures, Vol. 1, Japan Concrete Institute, Tokyo, 297–285.
Monti, G., Renzelli, M., and Luciani, P. (2003). “FRP adhesion in uncracked and cracked concrete zones.” Proc., 6th Int. Symp. on FRP Reinforcement for Concrete Structures, FRPRCS-6, World Scientific, Singapore, 183–192.
Nakaba, K., Kanakubo, T., Furuta, T., and Yoshizawa, H. (2001). “Bond behavior between fiber-reinforced polymer laminates and concrete.” ACI Struct. J., 98(3), 359–367.
Neubauer, U., and Rostasy, F. S. (1997). “Design aspects of concrete structures strengthened with externally bonded CFRP-plates.” Proc., 7th Int. Conf. on Structural Faults and Repair, M. C. Forde, ed., Engineering Technics Press, Edinburgh, UK, 109–118.
Neubauer, U., and Rostasy, F. S. (1999). “Bond failure of concrete fiber reinforced polymer plates at inclined cracks—Experiments and fracture mechanics model.” Proc., 4th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, SP-188, Americal Concrete Institute, Farmington Hills, MI, 369–382.
Niedermeier, R. (2000). “Envelope line of tensile forces while using externally bonded reinforcement.” Ph.D. thesis, TU München, Germany (in German).
Pan, J. L., and Leung, C. K. (2007). “Effect of concrete composition on FRP/concrete bond capacity.” J. Compos. Constr., 11(6), 611–618.
Pham, H., and Al-Mahaidi, R. (2004). “Bond characteristics of CFRP fabrics bonded to concrete members using wet lay-up method.” Proc., 2nd Int. Conf. on FRP Composites in Civil Engineering, CICE-2004, R. Seracino, ed., Adelaide, Australia, Balkema Publications, Rotterdam, Netherlands, 407–412.
Popovics, S. (1973). “A numerical approach to the complete stress-strain curve of concrete.” Cem. Concr. Res., 3(5), 583–599.
Ren, H. T. (2003). “Study on basic theories and long time behavior of concrete structures strengthened by fiber reinforced polymers.” Ph.D. thesis, Dalian Univ. of Technology, Dalian, China (in Chinese).
Sato, Y., Asano, Y., and Ueda, T. (2000). “Fundamental study on bond mechanism of carbon fiber sheet.” Proc. Jpn. Soc. Civ. Eng., 648, 71–87 (in Japanese).
Savioa, M., Farracuti, B., and Mazzotti, D. (2003). “Non-linear bond-slip law for FRP-concrete interface.” Proc., 6th Int. Symp. on FRP Reinforcement for Concrete Structures, FRPRCS-6, World Scientific, Singapore, 163–172.
Setunge, S. (1993). “Structural properties of very high-strength concrete.” Ph.D. thesis, Monash Univ., Melbourne, Australia.
Shi, J. W., Zhu, H., Wu, Z. S., Dai, Y. Q., He, X. Y., and Wu, G. (2012). “Digital image correlation method for determination of the bond-slip relationship of FRP sheet-concrete interface.” J. Civ. Eng., 45(10), 13–22 (in Chinese).
Shi, J. W., Zhu, H., Wu, Z. S., and Wu, G. (2010). “Experimental study on bond behavior between Basalt/Hybrid FRP sheets and concrete substrates.” J. Southeast Univ., 40(3), 554–558 (in Chinese).
Takeo, K., Matsushita, H., Makizumi, T., and Nagashima, G. (1997). “Bond characteristics of CFRP sheets in the CFRP bonding technique.” Proc. Jap. Concr. Inst., 19(2), 1599–1604.
Täljsten, B. (1997). “Defining anchor lengths of steel and CFRP plates bonded to concrete.” Int. J. Adhes. Adhes., 17(4), 319–327.
Tan, Z. (2002). “Experimental research for RC beam strengthened with GFRP.” M.Sc. thesis, Tsinghua Univ., Beijing, China (in Chinese).
Tanaka, T. (1996). “Shear resisting mechanism of reinforced concrete beams with CFS as shear reinforcement.” Graduation thesis, Hokkaido Univ., Hokkaido, Japan.
Teng, J., Chen, J., Smith, S. T., and Lam, L. (2002). FRP strengthened RC structures, Wiley, Chichester, West Sussex, UK.
Toutanji, H., Saxena, P., Zhao, L., and Ooi, T. (2007). “Prediction of interfacial bond failure of FRP–concrete surface.” J. Compos. Constr., 11(4), 427–436.
Ueda, T., Dai, J. G., and Sato, Y. (2003). “A nonlinear bond stress-slip relationship for FRP sheet-concrete interface.” Proc., Int. Symp. on Latest Achievement of Technology and Research on Retrofitting Concrete Structures, Japan Concrete Institute (JCI), Tokyo, Japan, 113–120.
Ueda, T., Sato, Y., and Asano, Y. (1999). “Experimental study on bond strength of continuous carbon fiber sheet.” Proc., 4th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, SP-188, American Concrete Institute, Farmington Hills, MI, 407–416.
Van Gemert, D. (1980). “Force transfer in epoxy bonded steel/concrete joints.” Int. J. Adhes. Adhes., 1(2), 67–72.
Woo, S. K., and Lee, Y. (2010). “Experimental study on interfacial behavior of CFRP-bonded concrete.” KSCE J. Civ. Eng., 14(3), 385–393.
Wu, Y. F., Xu, X. S., Sun, J. B., and Jiang, C. (2012). “Analytical solution for the bond strength of externally bonded reinforcement.” Compos. Struct., 94(11), 3232–3239.
Wu, Y. F., and Zhou, Y. W. (2010). “Unified strength model based on Hoek-Brown failure criterion for circular and square concrete columns confined by FRP.” J. Compos. Constr., 14(2), 175–184.
Wu, Z. S., Islam, S. M., and Said, H. (2009). “A three-parameter bond strength model for FRP–concrete interface.” J. Reinf. Plast. Compos., 28(19), 2309–2323.
Wu, Z. S., Yuan, H., and Niu, H. (2002). “Stress transfer and fracture propagation in different kinds of adhesive joints.” J. Eng. Mech., 128(5), 562–573.
Wu, Z. S., Yuan, H., Yoshizawa, H., and Kanakubo, T. (2001). “Experimental/analytical study on interfacial fracture energy and fracture propagation along FRP-concrete interface.”, American Concrete Institute, Farmington Hills, MI, 133–152.
Yang, J., and Wu, Y. F. (2007). “Interfacial stresses of FRP strengthened concrete beams: Effect of shear deformation.” Compos. Struct., 80(3), 343–351.
Yang, Y., Yue, Q., and Hu, Y. (2001). “Experimental study on bond performance between carbon fiber sheets and concrete.” J. Build. Struct., 22(3), 36–42 (in Chinese).
Yao, J., Teng, J. G., and Chen, J. F. (2005). “Experimental study on FRP-to-concrete bonded joints.” Composites Part B, 36(2), 99–113.
Yuan, H., Lu, X. S., Hui, D., and Feo, L. (2012). “Studies on FRP-concrete interface with hardening and softening bond-slip law.” Compos. Struct., 94(12), 3781–3792.
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), 553–565.
Yuan, H., and Wu, Z. S. (1999). “Interfacial fracture theory in structures strengthened with composite of continuous fiber.” Proc., Symp. of China and Japan, Science and Technology of 21st Century, Tokyo, 142–155.
Yuan, H., Wu, Z. S., and Yoshizawa, H. (2001). “Theoretical solutions on interfacial stress transfer of externally bonded steel/composite laminates.” J. Struct. Mech. Earthquake Eng., 18(1), 27–40.
Yun, Y. C. (2011). “Durability of FRP-concrete interface.” Ph.D. thesis, City Univ. of Hong Kong, Hong Kong.
Zhao, H. D., Zhang, Y., and Zhao, M. (2000). “Research on the bond performance between CFRP plate and concrete.” Proc., 1st Conf. on FRP-Concrete Structures of China, Central Research Institute of Building and Construction, Ministry of Metallurgical Industry of China, Beijing, China, 247–253 (in Chinese).
Zhou, Y. W. (2009). “Analytical and experimental study on the strength and ductility of FRP-reinforced high strength concrete beam.” Ph.D. thesis, Dalian Univ. of Technology, Dalian, China.
Zhou, Y. W., Wu, Y. F., and Yun, Y. C. (2010). “Analytical modeling of the bond-slip relationship at FRP-concrete interfaces for adhesively-bonded joints.” Composites Part B, 41(6), 423–433.
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Published In
Journal of Composites for Construction
Volume 17 • Issue 5 • October 2013
Pages: 673 - 686
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 13, 2012
Accepted: Mar 20, 2013
Published online: Mar 22, 2013
Published ahead of production: Apr 1, 2013
Discussion open until: Aug 22, 2013
Published in print: Oct 1, 2013
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