Bond behaviour of CFRP to concrete substrate under dynamic strain rates

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University of New Brunswick


This thesis explores the high strain rate bond behaviour of carbon fibre reinforced polymer (CFRP) sheets externally bonded to concrete. The experiments covered herein detail the bond behaviour when the bond between the CFRP sheet to concrete is subjected to dynamic loading, which is compared against previous studies on the bond behaviour under static loading. The ultimate strains and forces experienced by the CFRP sheets are compared against specimens tested under static strain rates, and Dynamic Increase Factors (DIFs) are then calculated. The bond stresses are calculated using the strain measurements obtained from the Digital Image Correlation (DIC) software and are compared against the static values found in previous research, showing a reduction in bond stress with an increase in strain rate. The failure mode of the CFRP bond is also explored and compared to past research.