Experimental Investigation on FRP-to-Timber Bonded Interfaces
Publication: Journal of Composites for Construction
Volume 18, Issue 3
Abstract
This paper presents the results of an experimental study on fiber-reinforced polymer (FRP) to timber bonded interfaces. A series of tests on 86 single shear FRP-to-timber joints is reported, of which the test parameters are (1) adhesive type, (2) FRP plate type, and (3) timber species. The results include descriptions of the behaviors of the specimens in addition to categorization of failure modes. Joint strengths, strain and bond stress distributions, and bond stress-slip relationships are also presented. Finally, a test-based -integral method is briefly introduced, which can predict the bond stress-slip behaviors of bonded joints. The results presented in this paper are expected to aid design engineers in selecting suitable adhesives and FRP plate types with which to strengthen different species of timber. The results may also be used to inform the design of future experimental studies on the topic.
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Acknowledgments
Financial support provided by The University of Hong Kong to the second author via General Research Fund (GRF) Incentive Award 10208970 (09-10) is gratefully acknowledged.
References
American Concrete Institute (ACI). (2004). “Guide test methods for fiber-reinforced polymers (FRPs) for reinforcing or strengthening concrete structures.”, Detroit.
ASTM. (2003). “Standard test method for strength properties of adhesive bonds in shear by compression loading.” D905-03, West Conshohocken, PA.
Breyer, D. E., Fridley, K. J., Cobeen, K. E., and Pollock, D. G. (2007). Design of wood structures—ASD-LRFD, McGraw-Hill, New York.
British Standards Institution. (1996). “Plastics—Determination of tensile properties.” BS EN ISO 527:1996, London.
British Standards Institution. (2006). “Timber structures. Structural timber and glued laminated timber. Determination of some physical and mechanical properties.” BS EN 408:2003, London.
Claisse, P. A., Davis, T. J., and Masse, B. (2007). “Fatigue testing of glass/epoxy joints in timber up to the endurance limit.” Constr. Build. Mater., 21, 139–149.
Crews, K., and Smith, S. T. (2006). “Tests on FRP-strengthened timber joints.” Proc., 3rd Int. Conf. on FRP Composites in Civil Engineering, CICE 2006, 677–680.
Dai, J., 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., 52–62.
Davalos, J. F., Qiao, P. Z., and Trimble, B. S. (2000a). “Fiber-reinforced composite and wood bonded interfaces: Part 1. Durability and shear strength.” J. Compos. Technol. Res., 22(4), 224–231.
Davalos, J. F., Qiao, P. Z., and Trimble, B. S. (2000b). “Fiber-reinforced composite and wood bonded interface, Part 2. Fracture.” J. Compos. Technol. Res., 22(4), 232–240.
Fawzia, S., Al-Mahaidi, R., and Zhao, X. L. (2006). “Experimental and finite element analysis of a double strap joint between steel plates and normal modulus CFRP.” Compos. Struct., 75(1–4), 156–162.
Hollaway, L. C., and Teng, J. G. (2008). Strengthening and rehabilitation of civil infrastructures using fibre-reinforced polymer (FRP) composites, Woodhead Publishing, Cambridge, UK.
ISO. (2001). “Adhesives: Wood-to-wood adhesive bonds; Determination of shear strength by compressive loading.”, Geneva.
Kim, S. J., Smith, S. T., and Young, B. (2010). “Effect of surface preparation on the strength of FRP-to mild steel and FRP-to-stainless steel joints.” Proc., 5th Int. Conf. on FRP Composites in Civil Engineering, CICE 2010, Springer, Berlin, 869–872.
Littell, J., Ruggeri, C., Goldberg, R., Roberts, G., Arnold, W., and Binienda, W. (2008). “Measurement of epoxy resin tension, compression, and shear stress–strain curves over a wide range of strain rates using small test specimens.” J. Aerosp. Eng., 162–173.
Lopez-Anido, R., Gardner, D. J., and Hensley, J. L. (2000). “Adhesive bonding of eastern hemlock glulam panels with E-glass/vinyl ester reinforcement.” Forest Prod. J., 50(11/12), 43–47.
MATLAB Version 7.7.0.471 [Computer software]. MathWorks, Natick, MA.
Özçifçi, A., and Yapici, F. (2008). “Effects of machining method and grain orientation on the bonding strength of some wood species.” J. Mater. Process. Technol., 202, 353–358.
Qiao, P., and Chen, F. (2009). “Interface crack between two interface deformable piezoelectric layers.” Int. J. Fract., 156(2), 185–201.
Raftery, G. M., Harte, A. M., and Rodd, P. D. (2009). “Bonding of FRP materials to wood using thin epoxy gluelines.” Int. J. Adhesion Adhesives, 29(5), 580–588.
Smith, S. T., and Gravina, R. J. (2007). “Modeling debonding failure in FRP flexurally strengthened RC members using a local deformation model.” J. Compos. Constr., 184–191.
Smith, S. T., and Teng, J. G. (2002). “FRP-strengthened RC beams. II: Assessment of debonding strength models.” Eng. Struct., 24, 397–417.
Wan, J., Smith, S. T., and Qiao, P. Z. (2010). “FRP-to-softwood joints: Experimental investigation.” Proc., 5th Int. Conf. on FRP Composites in Civil Engineering, CICE 2010, Springer, Berlin, 951–954.
Wang, K., Young, B., and Smith, S. T. (2011). “Mechanical properties of pultruded CFRP plates at elevated temperatures.” Eng. Struct., 33, 2154–2161.
Yao, J., Teng, J. G., and Chen, J. F. (2005). “Experimental study on FRP-to-concrete bonded joints.” Compos. Part B, 36, 99–110.
Yu, T., Fernando, D., Teng, J. G., and Zhao, X. L. (2012). “Experimental study on CFRP-to-steel bonded interfaces.” Compos. Part B, 43, 2279–2289.
Zhao, X. L., and Zhang, L. (2007). “State-of-the-art review on FRP strengthened steel structures.” Eng. Struct., 29, 1808–1823.
Zou, Y. W., Wu, Y. F., and Yun, Y. (2010). “Analytical modeling of the bond-slip relationship at FRP-concrete interfaces for adhesively-bonded joints.” Compos. Part B, 41, 423–433.
Information & Authors
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Published In
Journal of Composites for Construction
Volume 18 • Issue 3 • June 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Feb 5, 2013
Accepted: Jul 17, 2013
Published online: Jul 19, 2013
Discussion open until: Apr 1, 2014
Published in print: Jun 1, 2014
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