圆端再生骨料混凝土不锈钢管短柱轴压特性研究

IF 6.4 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-10-04 DOI:10.1016/j.engstruct.2025.121484

Zhibin Wang , Jingdong Tong , Fucheng Zhang , Hui Qu , Huailin Hao

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引用次数: 0

摘要

再生骨料混凝土填充不锈钢管（RACFSST）柱结合了美学优势和增强的耐腐蚀性，为沿海桥梁桥墩提供了可持续的替代方案。对14个试样进行了轴向压缩试验，评估了不锈钢等级（奥氏体304 vs双相2205）和长径比（B/D = 1.44-1.92）。结果表明，与不锈钢管（SST）相比，圆端RACFSST柱的轴向抗压能力提高了129.6 %。建立了有限元模型，研究了该柱的参数效应及其作用机理。力学分析表明，圆端RACFSST柱的承载能力、延性和围应力均高于碳钢管柱。参数分析表明，随着混凝土强度、SST屈服强度和钢比的增大，轴压阻力增大，随着长径比的增大，轴压阻力减小。现有设计方法低估了圆端RACFSST短柱的承载能力。新的预测方法发展了轴向抗压阻力，轴向抗压刚度和峰值应变。

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Behaviour of round-ended recycled aggregate concrete-filled stainless steel tubular stub column under axial compression

Recycled aggregate concrete-filled stainless steel tubular (RACFSST) columns combine aesthetic superiority with enhanced corrosion resistance, offering a sustainable alternative for coastal bridge piers. Axial compression tests were conducted on 14 specimens, evaluating stainless steel grades (Austenitic 304 vs. Duplex 2205) and aspect ratios (B/D = 1.44–1.92). Results revealed that round-ended RACFSST columns demonstrated a 129.6 %-higher axial compressive resistance compared to stainless steel tubular (SST) counterparts. A finite element model was implemented to study parametric effects and mechanisms of this column. Mechanistic analysis revealed that the round-ended RACFSST column exhibits higher load-carrying capacity, ductility, and confining stress than the column made with a carbon steel tube. Parametric analysis indicated that axial compressive resistances increase with higher concrete strength, SST yield strength, and steel ratio, but decrease with larger aspect ratio. Existing design methods underestimated the load-carrying capacity of round-ended RACFSST stub columns. New predictive methods were developed for axial compressive resistance, axial compressive stiffness, and peak strain.

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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.