Bond behavior between CFRP and corroded steel plate associations with surface treatments

Yang, Muye; Kainuma, Shigenobu; Xie, Jiajing; Liu, Weijie; Liu, Yan

doi:10.1016/j.compositesb.2022.110280

Cited by 16 publications

(2 citation statements)

References 47 publications

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“…Notably, the experimental beam does not experience substantial debonding, except for localized buckling around the middle stiffener. This underscores the significance of appropriate surface preparation in attaining a reliable bond between CFRP and steel [23]. Future research could focus on the predictability of debonding using Inventor Nastran's approach and the modeling techniques.…”

Section: Discussionmentioning

confidence: 99%

“…The use of low-viscosity epoxy resin in a primer pre-coating can enhance the interfacial bond strength by improving the wettability of the steel surface. This pre-coating can also prevent failure of the steel-adhesive bond interface [23]. The adhesive properties have a significant effect on the deflection of the strengthened steel beam during damage and debonding initiation.…”

Section: Introductionmentioning

confidence: 99%

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Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange

2023

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This study investigates the effectiveness of a carbon-fiber-reinforced polymer (CFRP) in enhancing the load-carrying capacity of a steel main girder in a metro station. The objective is to evaluate the applicability of CFRPs in sustaining increases in applied loads and assessing their effectiveness on curved surfaces. Finite element analysis (FEA) identified the most stressed areas of the girder under design loads. Based on the FEA results, a targeted strengthening procedure using CFRP sheets was proposed. Various arrangements of CFRP sheets were tested, including different orientations and thicknesses up to 60% of the girder’s flange thickness. To validate the FEA accuracy, two small-scale specimen beams were prepared and tested in the laboratory. One beam was strengthened with CFRP sheets on the tension part of the inner flange side, similar to the suggested strengthening method for the girder. The FEA results show that the CFRP increases stresses by an average of 8% to 10% for the steel main girder, with strengthening effects up to 19% at the center of the CFRP strengthening positions, differing from a regular straight flange shape. Significantly reducing stresses required a total CFRP layer thickness of at least 50% of the flange’s total thickness. Applying a CFRP on the inner face of the girder preserves its usability without the need for openings in finishes or the metal deck surface. The findings highlight CFRP’s potential to enhance load-carrying capacity on curved surfaces and sustain increased applied loads, offering a promising solution for strengthening infrastructure and similar applications.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%