Application of carbon fibre composite materials for the rehabilitation of fatigue damaged steel structures

摘要

This paper focuses on experimental investigations on single-sided reinforced centre-notched specimens considering different adhesives, presrressing grades as well as loading conditions. In the first test phase of the fatigue testing for each specimen a 40 mm long crack is induced which in the second phase is reinforced using adhesively bonded CFRP lamellas. In the third test phase the reinforced specimen is subjected to a fatigue test and the crack propagation is measured using RDS propagation gauges. The experimental results show a high potential for repairing fatigue damaged steel structures by the use of adhesively bonded CFRP lamellas. A significant increase of the remaining lifetime of the specimens can be observed. These results give good reason to further investigate the method of strengthening fatigue damaged steel structures using adhesively bonded CFRP lamellas.