Extension of service life: Novel approaches to repairing fatigue-damaged steel structures

This study addresses the challenge of repairing fatigue-damaged steel structures through innovative methods employing toughened epoxy adhesives and carbon fiber reinforced polymer (CFRP) laminates. Harsh environmental conditions and inadequate maintenance contribute to premature deterioration of civil engineering structures. Experimental investigations using compact tension (CT) specimens reveal significant improvements in structural integrity and residual life extension with double-sided CFRP application and appropriate adhesive selection. These findings underscore the importance of optimizing repair methods, offering valuable insights for enhancing structural durability. Further research is necessary to validate these methods for real-world application, particularly regarding debonding behavior and environmental influences.