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考虑砂浆随机分布的多孔沥青混合料黏附/黏聚失效行为

王晓威 张一鸣 王兴威 任家兴 杨旭 黄育兆 汪海年

王晓威, 张一鸣, 王兴威, 任家兴, 杨旭, 黄育兆, 汪海年. 考虑砂浆随机分布的多孔沥青混合料黏附/黏聚失效行为[J]. 交通运输工程学报, 2024, 24(3): 139-153. doi: 10.19818/j.cnki.1671-1637.2024.03.009
引用本文: 王晓威, 张一鸣, 王兴威, 任家兴, 杨旭, 黄育兆, 汪海年. 考虑砂浆随机分布的多孔沥青混合料黏附/黏聚失效行为[J]. 交通运输工程学报, 2024, 24(3): 139-153. doi: 10.19818/j.cnki.1671-1637.2024.03.009
WANG Xiao-wei, ZHANG Yi-ming, WANG Xing-wei, REN Jia-xing, YANG Xu, WONG Yiik-diew, WANG Hai-nian. Adhesion/cohesion failure behavior of porous asphalt concrete considering mortar random distribution[J]. Journal of Traffic and Transportation Engineering, 2024, 24(3): 139-153. doi: 10.19818/j.cnki.1671-1637.2024.03.009
Citation: WANG Xiao-wei, ZHANG Yi-ming, WANG Xing-wei, REN Jia-xing, YANG Xu, WONG Yiik-diew, WANG Hai-nian. Adhesion/cohesion failure behavior of porous asphalt concrete considering mortar random distribution[J]. Journal of Traffic and Transportation Engineering, 2024, 24(3): 139-153. doi: 10.19818/j.cnki.1671-1637.2024.03.009

考虑砂浆随机分布的多孔沥青混合料黏附/黏聚失效行为

doi: 10.19818/j.cnki.1671-1637.2024.03.009
基金项目: 

国家重点研发计划 2021YFB2601000

国家自然科学基金项目 52008333

高性能土木工程材料国家重点实验室开放基金课题 2023CEM006

详细信息
    作者简介:

    王晓威(1990-),男,河南安阳人,西安建筑科技大学副教授,工学博士,从事路面结构与材料研究

    通讯作者:

    汪海年(1977-),男,江苏涟水人,长安大学教授,工学博士

  • 中图分类号: U416.2

Adhesion/cohesion failure behavior of porous asphalt concrete considering mortar random distribution

Funds: 

National Key Research and Development Program of China 2021YFB2601000

National Natural Science Foundation of China 52008333

Open Fund Project of State Key Laboratory of High Performance Civil Engineering Materials 2023CEM006

More Information
  • 摘要: 为获得更加真实的多孔沥青混合料(PAC)黏附/黏聚失效行为,提出了一种考虑砂浆随机分布的细观有限元建模方法;基于X射线CT扫描和图像处理技术量化了PAC的真实细观结构和砂浆分布,研究了砂浆的随机分布特性;通过可精确控制砂浆厚度的拉拔试验评价了不同厚度砂浆的黏附/黏聚性能,确定了不同厚度砂浆对应的内聚力模型参数;在砂浆-集料边界和砂浆内部嵌入零厚度内聚力单元,并基于PAC内不同区域的砂浆厚度赋予该区域内聚力单元相应的模型参数,最终构建了考虑砂浆随机分布的细观有限元模型(模型A),研究了PAC黏附/黏聚失效行为的细观演化过程。研究结果表明:推荐将试件分割为36份用于表征砂浆的随机分布特性,砂浆厚度对其黏附/黏聚性能、失效模式以及内聚力模型参数具有显著影响,当砂浆厚度小于0.9 mm或在1.2~1.8 mm时为黏附失效,大于1.9 mm时为黏附-黏聚混合失效,其他厚度下为黏聚失效,且同一失效模式下,黏附/黏聚强度随着砂浆厚度的增大而增大;与不考虑砂浆随机分布的细观有限元模型(模型B)相比,模型A和B的起裂点均为黏附失效,但失效位置不同,模型B以单一的黏附失效为主,模型A表现出多种黏附/黏聚失效行为,与现场复杂的黏附/黏聚失效行为更加一致;砂浆的随机分布对PAC黏附/黏聚失效过程、应力分布、裂缝发展具有显著的影响,故考虑砂浆的随机分布能够更加准确地识别PAC黏附/黏聚失效的最不利位置,增大砂浆厚度能够延缓黏附/黏聚失效的扩展过程。

     

  • 图  1  PAC-13的CT图像

    Figure  1.  CT image of PAC-13

    图  2  PAC-13三组分的二值化图像

    Figure  2.  Binary images of three components of PAC-13

    图  3  砂浆厚度分布

    Figure  3.  Distribution of mortar thickness

    图  4  不同分割份数下砂浆厚度分布和变异系数

    Figure  4.  Mortar thickness distributions and coefficients of variation under different segmentation numbers

    图  5  拉拔试验

    Figure  5.  Pull-off test

    图  6  力-位移曲线和界面破坏

    Figure  6.  Force-displacement curve and interface failure

    图  7  间接拉伸试验

    Figure  7.  Indirect tensile test

    图  8  双线性CZM

    Figure  8.  Bilinear CZM

    图  9  零厚度二维内聚力单元嵌入

    Figure  9.  Zero thickness two-dimensional cohesive element embedding

    图  10  嵌入内聚力单元

    Figure  10.  Embedding of cohesive elements

    图  11  内聚力单元参数获取方法

    Figure  11.  Method for obtaining cohesive element parameters

    图  12  考虑砂浆随机分布的细观有限元模型

    Figure  12.  Meso-scale finite element model considering mortar random distribution

    图  13  力-位移时程曲线

    Figure  13.  Force-displacement time-history curves

    图  14  裂缝长度

    Figure  14.  Crack lengths

    图  15  模型的起裂点

    Figure  15.  Crack initiation points of models

    图  16  模型的裂缝扩展过程

    Figure  16.  Crack propagation processes of models

    图  17  完全破坏时模型的应力分布

    Figure  17.  Stress distributions of models at completed failure stage

    表  1  PAC-13和砂浆的级配组成与集料比表面积

    Table  1.   Gradation compositions and aggregate specific surface areas of PAC-13 and mortar

    集料粒径/mm 16.000 13.200 9.500 4.750 2.360 1.180 0.600 0.300 0.150 0.075
    PAC-13级配通过率/% 100.0 95.3 61.6 23.3 16.3 13.2 10.7 8.8 7.4 5.4
    砂浆级配通过率/% 100.0 100.0 100.0 100.0 100.0 100.0 81.1 66.7 56.1 40.9
    集料比表面积系数 0.41 0.41 0.82 1.64 2.87 6.14 12.29 32.77
    S1/ (m2·kg-1) 437.3
    S2/(m2·kg-1) 351.6
    下载: 导出CSV

    表  2  不同厚度砂浆的黏附/黏聚强度和失效模式

    Table  2.   Adhesion/cohesion strengths and failure modes of different thickness mortar

    砂浆厚度/mm 失效模式 开裂强度/MPa
    0.4 黏附失效 1.30
    0.9 黏附失效 1.81
    1.0 黏聚失效 1.33
    1.1 黏聚失效 1.90
    1.2 黏附失效 1.00
    1.3 黏附失效 1.06
    1.4 黏附失效 1.14
    1.5 黏附失效 1.17
    1.6 黏附失效 1.22
    1.7 黏附失效 1.24
    1.8 黏附失效 1.27
    1.9 混合失效 1.41
    2.0 混合失效 1.45
    下载: 导出CSV

    表  3  不同厚度砂浆的内聚力单元参数

    Table  3.   Cohesive element parameters of mortar with different thicknesses

    砂浆厚度/mm Tc/MPa K/(GPa·m-1) Gc/(J·mm-2)
    0.4 1.30 1.42 0.32
    0.9 1.81 1.43 0.45
    1.0 1.33 1.02 0.47
    1.1 1.90 1.80 0.48
    1.2 1.00 0.83 0.39
    1.3 1.06 0.92 0.42
    1.4 1.14 0.95 0.47
    1.5 1.17 0.97 0.49
    1.6 1.22 0.98 0.55
    1.7 1.24 0.99 0.61
    1.8 1.27 0.99 0.64
    1.9 1.41 1.10 0.75
    2.0 1.45 1.11 0.83
    下载: 导出CSV
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  • 收稿日期:  2024-01-23
  • 网络出版日期:  2024-07-18
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