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纤维缠绕GFRP管约束混凝土的轴压性能与设计模型

叶晗晖 徐声亮 茅鸣 布占宇

叶晗晖, 徐声亮, 茅鸣, 等. 纤维缠绕GFRP管约束混凝土的轴压性能与设计模型[J]. 复合材料学报, 2024, 42(0): 1-13.
引用本文: 叶晗晖, 徐声亮, 茅鸣, 等. 纤维缠绕GFRP管约束混凝土的轴压性能与设计模型[J]. 复合材料学报, 2024, 42(0): 1-13.
YE Hanhui, XU Shengliang, MAO Ming, et al. Axial compressive performance and design model of fiber wound GFRP tube confined concrete[J]. Acta Materiae Compositae Sinica.
Citation: YE Hanhui, XU Shengliang, MAO Ming, et al. Axial compressive performance and design model of fiber wound GFRP tube confined concrete[J]. Acta Materiae Compositae Sinica.

纤维缠绕GFRP管约束混凝土的轴压性能与设计模型

基金项目: 宁波市交通运输科技计划(202207);浙江省基础公益研究计划(LGG22E080007);国家自然科学基金(51878606)
详细信息
    通讯作者:

    布占宇,博士,教授,博士生导师,研究方向为桥梁设计理论 E-mail: buzhanyu@nbu.edu.cn

  • 中图分类号: TB332

Axial compressive performance and design model of fiber wound GFRP tube confined concrete

Funds: Transportation Science and Technology Project of Ningbo City (202207); Zhejiang Province Basic Public Welfare Research Project (LGG22E080007); National Natural Science Foundation of China (51878606)
  • 摘要: 设计制作了18组54个纤维缠绕GFRP管约束混凝土圆柱试件,参数包括纤维层数(6、10)、纤维角度($ \pm 45^\circ $、$ \pm 60^\circ $、$ \pm 80^\circ $)、长细比(2、4)和受压截面(全截面、核心混凝土),基于轴心受压试验结果,提出了依据纤维角度的面向设计的峰值应力预测模型。研究结果表明:GFRP管可有效提高约束试件的强度和延性。试件的峰值强度随着纤维角度和层数的增大而增大,长细比大的试件峰值强度的提升幅度更大,全截面受压会对约束试件的环向性能造成不利的影响。约束模式主要由纤维角度决定,其中$ \pm 60^\circ $和$ \pm 80^\circ $角度的试件为强约束,呈脆性破坏,$ \pm 45^\circ $角度的试件为弱约束,呈延性破坏。通过研究峰值强度与有效约束强度之间的数学关系,所得到的面向设计的简化模型,对于求解不同纤维角度试件的峰值强度具有足够的精度,可为相关的工程实际应用提供参考。

     

  • 图  1  纤维缠绕GFRP管

    Figure  1.  Fiber wound GFRP tubes

    图  2  纤维缠绕GFRP管约束混凝土轴心受压加载示意图

    Figure  2.  Axial compression loading diagram of fiber wound GFRP tube confined concrete

    图  3  纤维缠绕GFRP管约束混凝土试验加载现场图

    Figure  3.  Test loading site diagram of fiber wound GFRP tube confined concrete

    图  4  纤维缠绕GFRP管约束混凝土试件表面应变片布置

    Figure  4.  Strain gauge arrangement on specimen surface of fiber wound GFRP tube confined concrete

    图  5  纤维缠绕GFRP管约束混凝土试件破坏形态

    Figure  5.  Failure patterns of fiber wound GFRP tube confined concrete

    图  6  纤维缠绕GFRP管约束混凝土峰值强度

    Figure  6.  Peak strength of fiber wound GFRP tube confined concrete

    图  7  纤维缠绕GFRP管约束混凝土归一化峰值强度和有效约束强度

    Figure  7.  Normalized peak strength and effective confinement strength of fiber wound GFRP tube confined concrete

    图  8  纤维缠绕GFRP管约束混凝土归一化轴向应力-轴向应变及轴向应力-环向应变曲线

    Figure  8.  Normalized axial stress-axial strain and axial stress- hoop strain curve of fiber wound GFRP tube confined concrete

    图  9  纤维缠绕GFRP管约束混凝土轴向-环向应变关系

    Figure  9.  Axial-hoop strain relationship of fiber wound GFRP tube confined concrete

    图  10  纤维缠绕GFRP管约束混凝土约束模式

    Figure  10.  Confinement pattern of fiber wound GFRP tube confined concrete

    图  11  不同纤维角度的纤维缠绕GFRP管约束混凝土的回归结果

    Figure  11.  Regression results of fiber wound GFRP tube confined concrete with different fiber angles

    图  12  纤维缠绕GFRP管约束混凝土的回归公式验证

    Figure  12.  Regression formula verification of fiber wound GFRP tube confined concrete

    表  1  纤维缠绕GFRP管约束混凝土试件参数

    Table  1.   Specimen parameters of fiber wound GFRP tube confined concrete


    Group
    Diameter×
    High/mm
    Compr-ession
    section
    Specimen number θ/(°) n
    F 150$ \times $300 Full section G45 F6-1,2,3 $ \pm 45 $ 6
    G45 F10-1,2,3 10
    G60 F6-1,2,3 $ \pm 60 $ 6
    G60 F10-1,2,3 10
    G80 F6-1,2,3 $ \pm 80 $ 6
    G80 F10-1,2,3 10
    L 150$ \times $600 Full section G45 L6-1,2,3 $ \pm 45 $ 6
    G45 L10-1,2,3 10
    G60 L6-1,2,3 $ \pm 60 $ 6
    G60 L10-1,2,3 10
    G80 L6-1,2,3 $ \pm 80 $ 6
    G80 L10-1,2,3 10
    C 150$ \times $300
    Core concrete
    G45 C6-1,2,3 $ \pm 45 $ 6
    G45 C10-1,2,3 10
    G60 C6-1,2,3 $ \pm 60 $ 6
    G60 C10-1,2,3 10
    G80 C6-1,2,3 $ \pm 80 $ 6
    G80 C10-1,2,3 10
    Notes:In the specimen number, G represents GFRP specimen; 45, 60 and 80 represent fiber wound angle $ \theta $; F, L and C represent the corresponding specimen size and compression section; 6 and 10 represent the number of fiber wound layers $ n $; −1,2,3 represents the three identical specimens.
    下载: 导出CSV

    表  2  纤维缠绕GFRP管性能参数

    Table  2.   Performance parameters of fiber wound GFRP tube

    $ \pm 45^\circ $ $ \pm 60^\circ $ $ \pm 80^\circ $
    $ {E}_{\mathrm{i}\mathrm{a}} $/GPa 29.0 18.0 16.5
    $ {E}_{\mathrm{p}\mathrm{a}} $/GPa 29.0 12.4 9.7
    $ {f}_{\mathrm{c}\mathrm{t}}^{\prime} $/MPa 112.3 102.6 94.4
    $ {\varepsilon }_{\mathrm{c}\mathrm{t}} $/% 0.39 0.83 0.97
    $ {E}_{\mathrm{i}\mathrm{h}} $/GPa 18.0 29.4 35.1
    $ {E}_{\mathrm{p}\mathrm{h}} $/GPa 3.7 23.4 35.1
    $ {f}_{\mathrm{l}\mathrm{t}} $/MPa 111.8 410.2 578.6
    $ {\varepsilon }_{\mathrm{l}\mathrm{t}} $/% 3.01 1.75 1.65
    Notes:$ {E}_{\mathrm{i}\mathrm{a}} $ is the initial axial stiffnes; $ {E}_{\mathrm{p}\mathrm{a}} $ is the secant stiffness at peak axial stress;$ {f}_{\mathrm{c}\mathrm{t}}^{\prime} $ is the peak axial stress; $ {\varepsilon }_{\mathrm{c}\mathrm{t}} $ is the peak axial strain; $ {E}_{\mathrm{i}\mathrm{h}} $ is the initial hoop stiffnes; $ {E}_{\mathrm{p}\mathrm{h}} $ is the secant stiffness at peak hoop stress; $ {f}_{\mathrm{l}\mathrm{t}} $ is the peak hoop stress; $ {\varepsilon }_{\mathrm{l}\mathrm{t}} $ is the peak hoop strain.
    下载: 导出CSV

    表  3  纤维缠绕GFRP管约束混凝土轴压试验结果

    Table  3.   Axial compression test results of fiber wound GFRP tube confined concrete

    Specimen number $ {f}_{\mathrm{c}\mathrm{c}}^{\prime} $/MPa $ {f}_{\mathrm{c}\mathrm{c}}^{\prime}/{f}_{\mathrm{c}\mathrm{o}}^{\prime} $ $ {f}_{\mathrm{l}} $/MPa $ {f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime} $ $ {\varepsilon }_{\mathrm{c}\mathrm{c}} $/% $ {\varepsilon }_{\mathrm{f}\mathrm{e}} $/%
    G45 F6-1,2,3 44.1 1.27 5.5 0.16 0.4 /
    G45 F10-1,2,3 49.3 1.42 8.9 0.26 0.9 /
    G60 F6-1,2,3 102.4 2.94 15.5 0.44 2.6 1.4
    G60 F10-1,2,3 124.1 3.57 27.9 0.80 2.7 1.5
    G80 F6-1,2,3 127.5 3.66 16.4 0.47 2.2 1.2
    G80 F10-1,2,3 157.7 4.53 21.6 0.62 2.5 1.2
    G45 L6-1,2,3 39.9 1.72 5.4 0.23 0.5 /
    G45 L10-1,2,3 44.2 1.91 9.2 0.40 0.4 /
    G60 L6-1,2,3 89.9 3.88 18.5 0.80 1.9 1.7
    G60 L10-1,2,3 120.7 5.20 31.4 1.35 2.3 1.7
    G80 L6-1,2,3 117.4 5.06 21.6 0.93 2.2 1.5
    G80 L10-1,2,3 146.1 6.30 26.7 1.15 2.2 1.5
    G45 C6-1,2,3 57.1 1.64 5.6 0.16 0.5 /
    G45 C10-1,2,3 64.8 1.86 9.7 0.28 0.5 /
    G60 C6-1,2,3 122.8 3.53 17.6 0.50 2.3 1.6
    G60 C10-1,2,3 165.8 4.76 29.3 0.84 2.6 1.6
    G80 C6-1,2,3 155.3 4.46 19.4 0.56 2.2 1.4
    G80 C10-1,2,3 183.5 5.27 25.2 0.72 2.6 1.4
    Notes:$ {f}_{\mathrm{c}\mathrm{o}}^{\prime}$ is the compressive strength of unconfined concrete; $ {f}_{\mathrm{c}\mathrm{c}}^{\prime} $ is the peak compressive strength of confined concrete; $ {f}_{\mathrm{l}} $ is the effective restraint strength; $ {\varepsilon }_{\mathrm{c}\mathrm{c}} $ is the peak axial strain; $ {\varepsilon }_{\mathrm{f}\mathrm{e}} $ is the hoop effective confinement strain.
    下载: 导出CSV

    表  4  纤维缠绕GFRP管约束混凝土峰值强度预测公式及指标评价

    Table  4.   Prediction formula and index evaluation of peak strength of fiber wound GFRP tube confined concrete

    Prediction formula$ {f}_{\mathrm{c}\mathrm{c}}^{\prime}/{f}_{\mathrm{c}\mathrm{o}}^{\prime} $$ \mathrm{I}\mathrm{A}\mathrm{E}/\mathrm{\%} $$ \mathrm{M}\mathrm{A}\mathrm{P}\mathrm{E}/\mathrm{\%} $
    Lam[8]$ 1+3.3\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right) $24.018.7
    Saafi[9]$ 1+2.2{\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right)}^{0.84} $49.128.1
    Karbhari[10]$ 1+2.1{\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right)}^{0.87} $53.429.4
    Wu[11]$ 1+2.23{\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right)}^{0.96} $50.828.4
    Matthys[12]$ 1+2.3{\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right)}^{0.85} $46.027.0
    Youssef[13]$ 1+2.25{\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right)}^{1.25} $57.131.4
    Formula 5$ 1+1.38{\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right)}^{0.39} $7.98.5
    Formula 6$ 1+1.72{\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right)}^{0.96} $9.09.1
    Formula 7$ 1+3.65{\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right)}^{0.60} $7.27.7
    Formula 8$ 1+4.86{\left({f}_{\mathrm{l}}/{f}_{\mathrm{c}\mathrm{o}}^{\prime}\right)}^{0.68} $4.95.1
    Notes: $ {f}_{\mathrm{c}\mathrm{c}}^{\prime}/{f}_{\mathrm{c}\mathrm{o}}^{\prime} $ is normalized peak strength; IAE is integral absolute error; MAPE is mean absolute percentage error.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-10-30
  • 修回日期:  2023-12-21
  • 录用日期:  2023-12-30
  • 网络出版日期:  2024-01-30

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