Fifty-four carbon fiber reinforced resin composite(CFRP)-steel double lap specimens were designed to study the effects of liquid rubber modifier content and corrosion age on the mechanical properties of CFRP-steel modified interface under the erosion of two kinds of chlorine salts:High temperature water bath and dry-wet cycles at normal temperature.The results show that under the action of high temperature water bath and dry-wet cycles at normal temperature,the unmodified specimens show CFRP interlayer stripping failure and steel/binder interface stripping failure,respectively,while the liquid rubber modified specimens could transform the failure mode into adhesive cohesion failure,among which 10wt%liquid rubber has the best effect on improving interface durability.After 180 days of high temperature water bath and dry-wet cycles chloride salt erosion at normal temperature,the ultimate load retention rates of the specimens increase by 28.11%and 29.94%,respectively,compared with that of the unmodified specimens.Based on the experimental results,modified interface bond-slip models are established which are suitable for two kinds of chlorine salt erosion environments,and the predicted results are in good agree-ment with the experimental results.
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