Evaluation of flexural performance on corrosion-damaged RC beams retrofitted with UHPFRCC under marine exposure

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-03-24 DOI:10.1016/j.engstruct.2025.120193

Jing-Pu Tang , Ran Feng , Wai-Meng Quach , Jun-Jie Zeng

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引用次数: 0

Abstract

This paper presents an investigation on the corrosion resistance and flexural performance of corrosion-damaged reinforced concrete (RC) beams retrofitted with ultra-high performance fiber-reinforced cementitious composites (UHPFRCC) under marine environment. In this study, a novel simulation method of severe marine corrosion, was employed to evaluate the effectiveness of various UHPFRCC thicknesses on the crack propagation, stiffness, ductility, durability and load-carrying capacities of beams near ocean surfaces. In this method, the reduction of rebar cross-sectional area and the artificial marine cyclical dry-wet exposure over 360 days, were incorporated. Findings of this study reveal that the UHPFRCC retrofitting can substantially elevate the crack resistance, yield strength and load-carrying capacities; highlighting a marked improvement in both the stiffness and ductility, particularly after exposure. Moreover, the analysis on the effect of marine exposure underscores the pivotal role of UHPFRCC in preventing rebar from further corrosion, thereby extending the structural lifespan in the corrosive marine environment. Finally, a theoretical model was introduced to assess the bending resistance of UHPFRCC retrofitted beams. The results of this study offer a critical reference for the rehabilitation of marine infrastructure, supporting the UHPFRCC retrofitting as a viable solution against the pervasive challenge of corrosion in ocean engineering.

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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.