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UHPC三轴受压力学性能研究

周俊 韦建刚 杨艳 陈宝春 黄颖

周俊, 韦建刚, 杨艳, 陈宝春, 黄颖. UHPC三轴受压力学性能研究[J]. 工程力学, 2023, 40(11): 206-217, 226. doi: 10.6052/j.issn.1000-4750.2022.03.0259
引用本文: 周俊, 韦建刚, 杨艳, 陈宝春, 黄颖. UHPC三轴受压力学性能研究[J]. 工程力学, 2023, 40(11): 206-217, 226. doi: 10.6052/j.issn.1000-4750.2022.03.0259
ZHOU Jun, WEI Jian-gang, YANG Yan, CHEN Bao-chun, HUANG Ying. RESEARCH ON MECHANICAL PROPERTIES OF UHPC UNDER TRAXIAL COMPRESSION[J]. Engineering Mechanics, 2023, 40(11): 206-217, 226. doi: 10.6052/j.issn.1000-4750.2022.03.0259
Citation: ZHOU Jun, WEI Jian-gang, YANG Yan, CHEN Bao-chun, HUANG Ying. RESEARCH ON MECHANICAL PROPERTIES OF UHPC UNDER TRAXIAL COMPRESSION[J]. Engineering Mechanics, 2023, 40(11): 206-217, 226. doi: 10.6052/j.issn.1000-4750.2022.03.0259

UHPC三轴受压力学性能研究

doi: 10.6052/j.issn.1000-4750.2022.03.0259
基金项目: 国家自然科学基金项目(51878172);福建省中青年教师教育科研项目(科技类)(JAT210707)
详细信息
    作者简介:

    周 俊(1991−),女,江西人,讲师,博士,主要从事拱桥与组合桥梁研究(E-mail: zjun.zj@qq.com)

    杨 艳(1979−),女,福建人,副研究员,博士,硕导,主要从事组合结构、拱结构等研究(E-mail: yangyan@fzu.edu.cn)

    陈宝春(1958−),男,福建人,教授,博士,博导,主要从事拱桥研究(E-mail: baochunchen@fzu.edu.cn)

    黄 颖(1982−),女,福建人,副教授,博士,主要从事桥梁结构检测和加固方法研究(E-mail: huangying6820@163.com)

    通讯作者:

    韦建刚(1971−),男,广西人,研究员,博士,博导,主要从事拱桥计算理论、新型组合结构受力性能等研究(E-mail: weijg@fzu.edu.cn)

  • 中图分类号: TU528.31

RESEARCH ON MECHANICAL PROPERTIES OF UHPC UNDER TRAXIAL COMPRESSION

  • 摘要: 为了研究三轴受压下UHPC的受力性能,以围压大小和钢纤维掺量为试验参数,进行20组UHPC试件常规三轴试验,分析UHPC的破坏形态、应力-应变曲线、峰值应力和应变等力学性能。结果表明:围压和钢纤维掺量均为零的试件破坏时呈劈裂破坏,其他试件则呈剪切破坏;围压和钢纤维掺量对应力-应变曲线弹性模量和弹性段曲线形状影响较小;随着围压增大,峰值应力和应变呈不断增大趋势;随着钢纤维掺量增大,峰值应力和轴向峰值应变呈先增大后不变和先增大后减小趋势,环向峰值应变则呈增大趋势。通过对UHPC八面体正应力-体积应变和剪应力-剪应变关系进行分析,基于Drucker-Prager二参数准则,建立了UHPC八面体破坏准则计算方法。`
  • 图  1  岩石三轴测试系统主要装置照

    Figure  1.  Main device photo of rock triaxial testing system

    图  2  荷载加载路径图

    Figure  2.  Load path diagram

    图  3  试件装样照

    Figure  3.  Specimen photo

    图  4  试件破坏形态图

    Figure  4.  Specimen failure mode

    图  5  围压为10 MPa时不同钢纤维掺量试件破坏形态图

    Figure  5.  Specimen failure patterns of different steel fiber content with the confining pressure of 10 MPa

    图  6  不同围压UHPC应力-应变曲线对比图

    Figure  6.  Comparison of stress-strain curves of UHPC with different confining pressure

    图  7  不同钢纤维掺量UHPC应力-应变曲线对比图

    Figure  7.  Comparison of stress-strain curves of UHPC with different steel fiber content

    图  8  围压大小对峰值应力影响图

    Figure  8.  Effect of confining pressure on peak stress

    图  9  围压对峰值应变影响图

    Figure  9.  Effect of confining pressure on peak strain

    图  10  钢纤维掺量对轴向峰值应力影响图

    Figure  10.  Effect of steel fiber content on axial peak stress

    图  11  钢纤维掺量对峰值应变影响图

    Figure  11.  Effect of steel fiber content on peak strain

    图  12  不同围压八面体正应力-体积应变曲线图

    Figure  12.  Octahedral normal stress-volumetric strain curves with different confining pressure

    图  13  不同钢纤维掺量下八面体正应力-体积应变曲线图

    Figure  13.  Octahedral normal stress-volumetric strain curves with different fiber content

    图  14  不同围压八面体剪应力-剪应变曲线图

    Figure  14.  Octahedral shear stress-shear strain curves with different confining pressure

    图  15  不同钢纤维掺量下八面体剪应力-剪应变曲线图

    Figure  15.  Octahedral shear stress-shear strain curves with different steel fiber content

    图  16  UHPC八面体峰值正应力与峰值剪应力关系

    Figure  16.  Octahedral peak normal stress and peak shear stress curves of UHPC

    表  1  UHPC常规三轴试验参数一览表

    Table  1.   List of UHPC conventional triaxial test parameters

    试件编号高度H
    /mm
    直径D
    /mm
    围压σ3
    /MPa
    钢纤维掺量φf/(%)
    U0-01005000
    U0-1010050100
    U0-2010050200
    U0-3010050300
    U0-4010050400
    U1-01005001
    U1-1010050101
    U1-2010050201
    U1-3010050301
    U1-4010050401
    U2-01005002
    U2-1010050102
    U2-2010050202
    U2-3010050302
    U2-4010050402
    U3-01005003
    U3-1010050103
    U3-2010050203
    U3-3010050303
    U3-4010050403
    下载: 导出CSV

    表  2  UHPC配合比一览表

    Table  2.   List of UHPC mix proportion

    编号水泥/
    (kg/m3)
    硅灰/
    (kg/m3)
    石英砂/
    (kg/m3)
    减水剂/
    (kg/m3)
    水/
    (kg/m3)
    钢纤维掺量
    φf/(%)
    1859.5257.91005.721.5178.80
    2850.9255.3995.621.3177.01
    3842.4252.7985.621.1175.22
    4833.8250.1975.520.9173.43
    下载: 导出CSV

    表  3  试验结果一览表

    Table  3.   Experimental results list

    序号试件编号$\sigma _1^{\rm{u}} $/MPa$\varepsilon _1^{\rm{u}} $/(%)$\varepsilon _3^{\rm{u}} $/(%)$\sigma _{{\rm{oct}}}^{\rm{u}}$/MPa$V_{{\rm{oct}}}^{\rm{u}}$/(%)$\tau _{{\rm{oct}}}^{\rm{u}}$/MPa$\gamma _{{\rm{oct}}}^{\rm{u}}$/(%)
    1U0-01720.4000.141570.117810.510
    2U0-101970.4590.164660.131930.587
    3U0-201990.5400.170610.010910.669
    4U0-302120.5360.212710.1121000.705
    5U0-402280.5390.28076−0.0201080.772
    6U1-01800.4660.201600.064850.629
    7U1-102320.5870.232730.0281040.857
    8U1-202480.6720.247830.1851170.859
    9U1-302640.7100.284880.0891240.937
    10U1-402740.7810.309910.0871291.126
    11U2-01860.4110.24560−0.080850.619
    12U2-102370.6270.263790.1001061.182
    13U2-202560.7160.291850.1341210.950
    14U2-302630.7550.342880.0701241.035
    15U2-402800.7770.360930.0561321.072
    16U3-01800.4100.30660−0.202850.674
    17U3-102340.6280.35378−0.0791110.925
    18U3-202550.6700.34683−0.0691200.958
    19U3-302650.7380.35888−0.0041251.033
    20U3-402820.7720.363900.0461281.070
    注:$\sigma _1^{\rm{u}} $为轴向峰值应力;$\varepsilon _1^{\rm{u}} $为轴向峰值应变;$\varepsilon _3^{\rm{u}} $为环向峰值应变;$\sigma _{_{{\rm{oct}}} }^{\rm{u }}$为八面体峰值正应力;$V_ {\rm{oct} } ^\rm{u}$为八面体峰值体积应变;$\tau _{_{{\rm{oct}}} }^{\rm{u}}$为八面体峰值剪应力;$\gamma _{{\rm{oct}}}^{\rm{u}}$为八面体峰值剪应变。
    下载: 导出CSV
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  • 收稿日期:  2022-03-23
  • 修回日期:  2022-07-09
  • 网络出版日期:  2022-07-14
  • 刊出日期:  2023-11-25

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