Prediction of ultimate strength of FRP confined steel reinforced concrete columns subjected to eccentric compression loads

IF 6.4 1区工程技术 Q1 ENGINEERING, CIVIL Engineering Structures Pub Date : 2025-08-01 Epub Date: 2025-04-26 DOI:10.1016/j.engstruct.2025.120334

Dan Wang , Jin-Ben Gu , Yi Tao , Qing-Xuan Shi

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Abstract

Understanding the mechanical behavior of FRP confined steel reinforced concrete (FCSRC) columns under eccentric loads provides a theoretical support for optimizing its structural performance subjected to complex load conditions. This study was dedicated to developing a new strength model to predict the ultimate load capacity of FCSRC columns under eccentric compression loads. The proposed model introduced the unified strength theory as a framework, meanwhile accounted for the effect of effective steel flange width and combined confinement from Fiber Reinforced Polymer (FRP) tube and steel section. The applicability of the strength model was estimated by comparing it with available test results under the same load conditions. The results showed that this model provided a favorable prediction for ultimate eccentric compression loads of FCSRC columns with different concrete strengths, consistent with the experimental findings. Also, it can give a better estimation of the load capacity of FCSRC columns suffering from concentric compression loads.

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偏心受压作用下FRP约束型钢混凝土柱极限强度预测

了解FRP约束钢筋混凝土柱在偏心荷载作用下的受力特性，为优化其在复杂荷载条件下的结构性能提供理论支持。本研究致力于建立一种新的强度模型来预测FCSRC柱在偏心压缩荷载作用下的极限承载能力。该模型以统一强度理论为框架，同时考虑了有效钢法兰宽度和FRP管与钢截面的联合约束的影响。在相同荷载条件下，通过与现有试验结果的比较，评价了强度模型的适用性。结果表明，该模型能较好地预测不同混凝土强度的FCSRC柱的极限偏心压缩荷载，与试验结果一致。此外，该方法还能较好地估计FCSRC柱在受同心压缩荷载作用下的承载能力。

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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.