Advanced Materials Methods Driving New Life in Critical Infrastructure
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Abstract
Fatigue damage is a major threat to many hydraulic steel structures (HSS). HSS experience fatigue loading during operation and are exposed to harsh environmental conditions that reduce fatigue life. The common methods to inspect and repair HSS is time-consuming and costly. Studies investigating the use of bonded Carbon and Basalt fiber reinforced polymer (CFRP, BFRP) to repair fatigue cracks in HSS are lacking. The main objectives of this study was to increase the bonding of FRP, investigate the effectiveness of different fiber-reinforced polymers, and perform experiments on different retrofitting configurations. In this study, eight large-scale center-cracked panels were tested under mode I loading under different environmental conditions, repair materials, and retrofitting configurations. Results indicated that the use of both CFRP and BFRP are both effective at extending fatigue life. Steel retrofitted with full patches of BFRP that cover the crack can reached infinite fatigue life. This article will conclude with several examples where FRP’s have been used to repair lock gates.
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References
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