再生骨料高强钢管混凝土构件压弯扭组合性能研究

IF 6.4 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-04-17 DOI:10.1016/j.engstruct.2025.120052

Zhi-Cheng Yang , Lin-Hai Han , Hua-Yang Zhao , Xiang-Yu Zhou

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引用次数: 0

摘要

本文研究了再生骨料高强钢管混凝土（RAC-FHST）构件在压缩-弯曲-扭转组合作用下的性能。在压缩-扭转、弯曲-扭转和压缩-弯曲-扭转复合加载状态下，对32个RAC-FHST试件进行了试验。试验中变化的主要参数包括钢管屈服强度、轴向载荷比和弯矩水平。对试件的典型破坏模式、全范围扭转角响应和极限强度进行了综合分析。结果表明，由于钢管的良好约束作用，RAC-FHST构件的力学性能得到了改善。建立并验证了有限元建模方法，以研究其力学行为、破坏模式以及约束因子对归一化轴力-弯矩-扭转（N/Nu-M/Mu-T/Tu）相互作用曲线的影响。在此基础上，提出了RAC-FHST构件压缩-弯曲-扭转组合作用下极限强度的简化计算方法。这些简化的计算方法为工程应用提供了有价值的参考。

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Performance of recycled aggregate concrete-filled high-strength steel tubular members under combined compression-bending-torsion

This paper presents an investigation into the behaviour of recycled aggregate concrete-filled high-strength steel tubular (RAC-FHST) members subjected to combined compression-bending-torsion. A series of 32 RAC-FHST specimens were tested under combined compression-torsion, bending-torsion and compression-bending-torsion loading states. The primary parameters varied in the tests included the yield strength of steel tube, the axial load ratio and the bending moment level. A comprehensive analysis was conducted on the typical failure modes, full-range torsional moment-rotation response, and ultimate strength of the specimens. The results indicated that the mechanical behaviour of RAC-FHST members was enhanced owing to the superior confinement effect provided by the steel tube. A finite element modeling approach is developed and validated to examine the mechanical behaviour, failure modes, and the influence of the confinement factor on the normalized axial force-bending moment-torsion (N/N_u-M/M_u-T/T_u) interaction curves. Based on the analysis, simplified calculation methods are proposed for predicting the ultimate strength of RAC-FHST members under combined compression-bending-torsion. These simplified calculation methods offer valuable references for engineering applications.

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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.