In order to improve the corrosion resistance of marine engineering structures,a large number of epoxy reinforced concrete structures are used in large-scale sea-related projects.In view of the difficulties in the detection and fatigue life prediction of epoxy reinforced concrete structures under fatigue loads,fatigue tests and electrochemical detection tests were carried out.Based on the characteristics of impedance changes,a nondestructive detection method for cracking of epoxy coating on reinforcements was established to study the cracking characteristics of epoxy coating and the fatigue life of epoxy reinforced concrete beams under fatigue action.Research has found that the coating cracking detection method established in this paper can accurately identify coating damage;the first cracking location of the epoxy coating on reinforcements is at the anchorage end of the reinforcement,the fatigue times of the first cracking of the epoxy coating on reinforcements accounts for 40％of the fatigue life;After fatigue failure of the beam,there are multiple fatigue damages on the epoxy reinforcement,mainly occurring at the connection between the main reinforcement and stirrup,as well as the anchorage end of the reinforcement.
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