Axial compressive behavior and stress-strain model analysis of FRP-confined corroded RC columns with different-sized circular sections

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-03-10 DOI:10.1016/j.engstruct.2025.120025

Fang Yuan , Haoran Li , Wenbin Liu , Huihui Li , Jinlong Pan

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引用次数: 0

Abstract

Compared to the non-corroded counterparts, very few studies have focused on the size effect on the mechanical performance and stress-strain behavior of FRP-confined corroded RC columns. To fill this research gap, this paper experimentally studied the axial compressive behavior and stress-strain response of several CFRP-confined corroded RC columns with different-sized circular sections. 96 circular RC columns were designed and the critical test parameters mainly included the column size, corrosion rate, and the number of CFRP layers. Subsequently, the effects of corrosion rate, the number of CFRP layers, and size effect on the failure modes, load-displacement curves, stress-strain curves, ultimate conditions, and FRP confining efficiency of the specimens were extensively examined. The results indicated that there was no significant size effect on the stress-strain behavior of FRP-confined corroded concrete (i.e., the damaged concrete due to rebar corrosion), but it would be more pronounced when the specimen size was small and the columns were under higher corrosion rates. In addition, by incorporating the influence of rebar corrosion on the damage of concrete and FRP confining efficiency, this study proposed the improved stress-strain models for FRP-confined corroded concrete and the analytical ultimate axial load model for the FRP-confined corroded RC columns. It is observed that the proposed models could yield better prediction results than the existing models available in the literature.

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.