Fatigue cracking is one of the most common issue that damages the serviceability of steel bridg-es.Prestressed carbon fiber-reinforced polymer(CFRP)materials can effectively inhibit crack propaga-tion,thereby extending the service life of structures.In prestressed CFRP-reinforced steel beams,the in-terface between CFRP and steel interface serves as the primary load transfer path,ensuring the mechanical properties and durability of the reinforced structure.However,under the influence of fatigue and hygrother-mal environments,the bonding performance of the interface between CFRP and steel may tend to degrade,leading to the degradation of mechanical properties in the reinforced structure.This paper summarized the results of static and fatigue performance tests of steel beams with different prestressed strengthening system design schemes,as well as the degree of influence of environmental factors on structural performance,based on existing research.Additionally,this paper compiled formulas for calculating the interface princi-pal stress and energy release rate of damaged steel beams reinforced with prestressed CFRP,and proposed methods for predicting the bearing capacity reduction coefficient and service life of reinforced steel beams under fatigue loading and hygrothermal environments,as well as structural reinforcement design strategies considering interface durability.
维普
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