Experimental Study on Bond Behavior between CFRP Plates and Steel Substrates Using Digital Image Correlation
Publication: Journal of Composites for Construction
Volume 20, Issue 6
Abstract
The bond between carbon-fiber-reinforced polymer (CFRP) and steel is crucial for strengthening of steel structures using CFRP materials. However, existing studies on this issue are still limited. To better understand the bond behavior of CFRP-to-steel bonded interfaces, this paper reports an experimental study on the behavior of CFRP plate-to-steel bonded joints with a nonlinear adhesive by the single-shear testing method. The three-dimensional digital image correlation (3D-DIC) technique was used to measure the displacements and strains of the specimens. The effects of the bond length and adhesive thickness on the bond behavior are evaluated. The results show that failure occurred within the adhesive layer (i.e., cohesive failure) for all tested specimens. The ultimate load increased with increasing bond length until the effective bond length was reached. The ultimate load also increased as the adhesive thickness was increased from 0.5 to 2.0 mm. The bond-slip relationship exhibited an approximate trapezoidal shape for such bonded joints. The key parameters of the trapezoidal bond-slip relationship were obtained for specimens with different adhesive thicknesses. This study indicates that the 3D-DIC technique is suitable for application in studies of the interfacial behavior between CFRP plate and steel.
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Acknowledgments
The authors would like to acknowledge the financial support from the National Basic Research Program of China (No. 2012CB026200), the National Natural Science Foundation of China (No. 51525801), and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
References
Akbar, I., Oehlers, D. J., and Mohamed Ali, M. S. (2010). “Derivation of the bond-slip characteristics for FRP plated steel members.” J. Constr. Steel. Res., 66(8–9), 1047–1056.
Ali-Ahmad, M., Subramaniam, K., and Ghosn, M. (2006). “Experimental investigation and fracture analysis of debonding between concrete and FRP sheets.” J. Eng. Mech., 914–923.
Al-Mosawe, A., Al-Mahaidi, R., and Zhao, X. L. (2015). “Effect of CFRP properties, on the bond characteristics between steel and CFRP laminate under quasi-static loading.” Constr. Build. Mater., 98, 489–501.
Al-Saidy, A. H., Klaiber, F. W., and Wipf, T. J. (2004). “Repair of steel composite beams with carbon fiber-reinforced polymer plates.” J. Compos. Constr., 163–172.
Bocciarelli, M., Bocciarelli, P., Fava, G., and Poggi, C. (2009). “Prediction of debonding strength of tensile steel/CFRP joints using fracture mechanics and stress based criteria.” Eng. Fract. Mech., 76(2), 299–313.
Carloni, C., Subramaniam, K. V., Savoia, M., and Mazzotti, C. (2012). “Experimental determination of FRP-concrete cohesive interface properties under fatigue loading.” Compos. Struct., 94(4), 1288–1296.
Chen, J. F., and Teng, J. G. (2001). “Anchorage strength models for FRP and steel plates bonded to concrete.” J. Struct. Eng., 784–791.
Chinese Standard. (2003). “Code for design of steel structures.”, China Planning Press, Beijing (in Chinese).
Dai, J. G., Gao, W. Y., and Teng, J. G. (2013). “Bond-slip model for FRP laminates externally bonded to concrete at elevated temperature.” J. Compos. Constr., 217–228.
Dehghani, E., Daneshjoo, F., Aghakouchak, A. A., and Khaji, N. (2012). “A new bond-slip model for adhesive in CFRP-steel composite systems.” Eng. Struct., 34, 447–454.
Deng, J., and Lee, M. M. K. (2007). “Behaviour under static loading of metallic beams reinforced with a bonded CFRP plate.” Compos. Struct., 78(2), 232–242.
Fawzia, S., Zhao, X. L., and Al-Mahaidi, R. (2010). “Bond-slip models for double strap joints strengthened by CFRP.” Comp. Struct., 92(9), 2137–2145.
Fernando, D., Teng, J. G., Yu, T., and Zhao, X. L. (2013). “Preparation and characterization of steel surfaces for adhesive bonding.” J. Compos. Constr., 04013012.
Fernando, D., Yu, T., and Teng, J. G. (2014). “Behavior of CFRP laminates bonded to a steel substrate using a ductile adhesive.” J. Compos. Constr., 04013040.
Ghiassi, B., Xavier, J., Oliveira, D. V., and Lourenço, P. B. (2013). “Application of digital image correlation in investigating the bond between FRP and masonry.” Compos. Struct., 106, 340–349.
Harries, K. A., Peck, A. J., and Abraham, E. J. (2009). “Enhancing stability of structural steel sections using FRP.” Thin Wall Struct., 47(10), 1092–1101.
Heshmati, M., Haghani, R., and Al-Emrani, M. (2015). “Environmental durability of adhesively bonded FRP/steel joints in civil engineering applications: State of the art.” Compos., Part B, 81, 259–275.
Hollaway, L. C., and Cadei, J. (2002). “Progress in the technique of upgrading metallic structures with advanced polymer composites.” Prog. Struct. Eng. Mater., 4(2), 131–148.
Kalfat, R., and Al-Mahaidi, R. (2014). “Experimental investigation into the size effect of bidirectional fiber patch anchors in strengthening of concrete structures.” Compos. Struct., 112, 134–145.
Kim, Y. J., and Brunell, G. (2011). “Interaction between CFRP-repair and initial damage of wide-flange steel beams subjected to three-point bending.” Compos. Struct., 93(8), 1986–1996.
Kim, Y. J., LaBere, J., and Yoshitake, I. (2013). “Hybrid epoxy-silyl modified polymer adhesives for CFRP sheets bonded to a steel substrate.” Compos: Part B, 51, 233–245.
Liu, H. B., Al-Mahaidi, R., and Zhao, X. L. (2009). “Experimental study of fatigue crack growth behaviour in adhesively reinforced steel structures.” Compos. Struct., 90(1), 12–20.
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.
PMLAB 3D-DIC [Computer software]. PMLAB Sensor Tech., Nanjing, China.
Sallam, H. E. M., Badawy, A. A. M., Saba, A. M., and Mikhail, F. A. (2010). “Flexural behavior of strengthened steel-concrete composite beams by various plating methods.” J. Constr. Steel. Res., 66(8–9), 1081–1087.
Shi, J. W. (2014). “Durability and reliability design of FRP strengthened concrete structures under coupled effect of multi-factors.” Ph.D. thesis, Southeast Univ., Nanjing, China.
Shi, J. W., Zhu, H., Wu, Z. S., Seracino, R., and Wu, G. (2013). “Bond behavior between basalt fiber-reinforced polymer sheet and concrete substrate under the coupled effects of freeze-thaw cycling and sustained load.” J. Compos. Constr., 530–542.
Taljsten, B. (1994). “Plate bonding: Strengthening of existing concrete structures with epoxy bonded plates of steel or fibre reinforced plastics.” Ph.D. thesis, Lulea, Univ. of Technology, Lulea, Sweden.
Teng, J. G., Yu, T., and Fernando, D. (2012). “Strengthening of steel structures with fiber-reinforced polymer composites.” J. Constr. Steel. Res., 78, 131–143.
Wang, H. T., and Wu, G. (2015). “Experimental study on the fatigue behavior of CFRP-to-steel bonded interface.” 12th Int. Symp. on Fiber Reinforced Polymers for Reinforced Concrete Structures & the 5th Asia-Pacific Conf. on Fiber Reinforced Polymers in Structures Joint Conf., International Institute for FRP in Construction, Nanjing, China.
Wang, H. T., Wu, G., and Jiang, J. B. (2015). “Fatigue behavior of cracked steel plates strengthened with different CFRP systems and configurations.” J. Compos. Constr., 04015078.
Wu, C., Zhao, X. L., Duan, W. H., Al-Mahaidi, R. (2012). “Bond characteristics between ultra high modulus CFRP laminates and steel.” Thin. Wall. Struct., 51, 147–157.
Wu, Y. F., and Jiang, C. (2013). “Quantification of bond-slip relationship for externally bonded FRP-to-concrete joints.” J. Compos. Constr., 673–686.
Wu, Z. S., Yuan, H. and Niu, H. D. (2002). “Stress transfer and fracture propagation in different kinds of adhesive joints.” J. Eng. Mech., 562–573.
Xia, S. H., and Teng, J. G. (2005). “Behavior of FRP-to-steel bond joints.” Proc., Int. Symp. on Bond Behaviour of FRP in Structures, International Institute for FRP in Construction, Hong Kong.
Yu, T., Fernando, D., Teng, J. G., and Zhao, X. L. (2012). “Experimental study on CFRP-to-steel bonded interfaces.” Compos., Part B, 43(5), 2279–2289.
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.
Zhao, X. L., Bai, Y., Al-Mahaidi, R., and Rizkalla, S. (2013). “Effect of dynamic loading and environmental conditions on the bond between CFRP and steel: State-of-the-art review.” J. Compos. Constr., .
Zhao, X. L., and Zhang, L. (2007). “State-of-the-art review on FRP strengthened steel structures.” Eng. Struct., 29(8), 1808–1823.
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Published In
Journal of Composites for Construction
Volume 20 • Issue 6 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Nov 13, 2015
Accepted: Feb 5, 2016
Published online: May 10, 2016
Discussion open until: Oct 10, 2016
Published in print: Dec 1, 2016
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