新型GFRP箍筋和GFRP筋加筋圆形混凝土构件的抗剪性能

IF 6.4 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-10-11 DOI:10.1016/j.engstruct.2025.121509

Chen Chen , Hai Fang , Yun Mook Lim , Bonhwi Choo

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引用次数: 0

摘要

近年来，纤维增强聚合物（FRP）箍筋-钢筋混凝土圆截面构件的抗剪性能研究受到了广泛关注。然而，由于拉伸FRP筋的制造过程，弯曲截面的强度远远小于直截面的强度。本文提出了一种新型FRP箍筋，并对FRP箍筋加筋圆形构件的抗剪性能进行了研究。讨论了不同箍筋比例和不同箍筋类型对混凝土抗剪性能的影响。结果表明：FRP网格螺旋钢筋混凝土柱（FSRCC）的抗剪强度比FRP箍筋钢筋混凝土柱（FHRCC）提高了16.2 %，破坏模式由受剪拉伸转变为受弯压缩；当配箍比由0.32 %增加到0.72 %时，抗剪强度最大增幅为26.0 %。CSA S806-12能较准确地预测FSRCC的抗剪强度。此外，利用ABAQUS/Explicit软件建立了考虑FRP筋与混凝土粘结滑移特性的有限元模型，模拟了FSRCC的抗剪性能。对关键参数进行了参数化分析。结果表明，提高纵向配筋率是提高FSRCC抗剪能力影响最大的参数。

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Shear behavior of novel GFRP stirrup and GFRP bar reinforced circular concrete members

Recently, research on the shear performance of fiber-reinforced polymer (FRP) stirrup-reinforced concrete circular cross-section members has received extensive attention. However, the strength of the bending section is much less than the strength of the straight section due to the manufacturing process of pultruding the FRP bar. In this work, an innovative FRP stirrup was proposed, and the shear performance of FRP stirrup-reinforced circular members was investigated. The effect of different stirrup ratios and different stirrup types on the shear behavior was discussed. The results indicated that the shear strength of FRP grid spiral-reinforced concrete cylinders (FSRCC) was increased by 16.2 % compared to FRP hoop-reinforced concrete cylinders (FHRCC), and the failure mode was changed from shear tension to flexure compression. The maximum increase in the shear strength was 26.0 % when the stirrup ratio was increased from 0.32 % to 0.72 %. The CSA S806–12 could accurately forecast the shear strength of FSRCC. In addition, a finite element model incorporating the bond-slip behavior between FRP bars and concrete was formulated using ABAQUS/Explicit to simulate the shear behavior of FSRCC. The parametric analysis of the key parameters was conducted. The results indicated that increasing the longitudinal reinforcement ratio constituted the most influential parameter for improving the shear capacity of FSRCC.

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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.