Location
University of Leeds
Keywords
CFRP, Steel bolt anchorage, Concrete cover separation (CCS), IC debonding (ICD), RC beam
Abstract
Using fiber-reinforced polymer (FRP) to retrofit or strengthen the concrete structures is an attractive option in construction areas nowadays. However, premature debonding failures limit the efficacy of fiber utilization. It is presently accepted that anchorage system is an attractive option to solve this problem. Much efforts has been made through experimental testing and numerical modeling to investigate the anchorage systems, meanwhile various systems were created and developed. However, researches on the mechanism of the anchorage systems are still too rare to build a countable and union design guideline with respect to different premature debonding failure modes. The present paper focused on two commonly documented anchorage methods: steel bolt anchorage and CFRP end wrapping anchorage and conducted a specially design experiment to further analyze the mechanism of effect of both systems on premature debonding failures (concrete cover separation and IC debonding). Results show that CFRP wrapping and Steel bolts can both effectively stop or suppress the propagation of IC debonding. And the ultimate load is effected by the finally failure mode, which could be changed with different height of steel bolt.
Included in
Effect of Multi- Steel Bolt Anchorages on Composite Beams
University of Leeds
Using fiber-reinforced polymer (FRP) to retrofit or strengthen the concrete structures is an attractive option in construction areas nowadays. However, premature debonding failures limit the efficacy of fiber utilization. It is presently accepted that anchorage system is an attractive option to solve this problem. Much efforts has been made through experimental testing and numerical modeling to investigate the anchorage systems, meanwhile various systems were created and developed. However, researches on the mechanism of the anchorage systems are still too rare to build a countable and union design guideline with respect to different premature debonding failure modes. The present paper focused on two commonly documented anchorage methods: steel bolt anchorage and CFRP end wrapping anchorage and conducted a specially design experiment to further analyze the mechanism of effect of both systems on premature debonding failures (concrete cover separation and IC debonding). Results show that CFRP wrapping and Steel bolts can both effectively stop or suppress the propagation of IC debonding. And the ultimate load is effected by the finally failure mode, which could be changed with different height of steel bolt.
