Advanced Steel Construction

Vol. 1, No. 2, pp.17-28  (2005)


BOND CHARACTERISTICS BETWEENCFRP AND STEEL PLATES IN DOUBLE STRAP JOINTS

 

S. Fawzia1, X.L. Zhao1,*, R. Al-Mahaidi1 and S. Rizkalla2

1Department of Civil Engineering, Monash University, Clayton, Victoria 3800, Australia

2North Carolina State University, Raleigh, North Carolina, USA

(*Corresponding Author, Email: This email address is being protected from spambots. You need JavaScript enabled to view it.)

 

 

DOI:10.18057/IJASC.2005.1.2.2

 

ABSTRACT:

This paper describes a series of double strap shear tests loaded in tension to investigate the bond betweenCFRP sheets and steel plates. Both normal modulus (240 GPa) and high modulus (640 GPa) CFRPs were used in the test program. Strain gauges were mounted to capture the strain distribution along the CFRP length. Different failure modes were observed for joints with normal modulus CFRP and those with high modulus CFRP. The strain distribution along the CFRP length was found to be similar for the two cases. A shorter effective bond length was obtained for joints with high modulus CFRP whereas larger ultimate load carrying capacity can be achieved for joints with normal modulus CFRP when the bond length is long enough. The Hart-Smith Model was modified to predict the effective bond length and ultimate load carrying capacity of joints between the normal modulus CFRP and steel plates. The Multilayer Distribution Model developed by the authors was modified to predict the load carrying capacity of joints between the high modulus CFRP and steel plates. The predicted values agreed well with experimental ones.

 

Keywords:CFRP (Carbon Fibre Reinforced Polymer), Bond Failure, Double Strap Joints, Effective Bond Length,Steel Plate.

 

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