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高铁防水封闭层沥青混凝土冻融损伤演化模型

李进 石越峰 肖鑫 楼梁伟 蔡德钩 肖飞鹏

李进, 石越峰, 肖鑫, 楼梁伟, 蔡德钩, 肖飞鹏. 高铁防水封闭层沥青混凝土冻融损伤演化模型[J]. 西南交通大学学报, 2024, 59(2): 281-288. doi: 10.3969/j.issn.0258-2724.20220335
引用本文: 李进, 石越峰, 肖鑫, 楼梁伟, 蔡德钩, 肖飞鹏. 高铁防水封闭层沥青混凝土冻融损伤演化模型[J]. 西南交通大学学报, 2024, 59(2): 281-288. doi: 10.3969/j.issn.0258-2724.20220335
LI Jin, SHI Yuefeng, XIAO Xin, LOU Liangwei, CAI Degou, XIAO Feipeng. Freeze-Thaw Damage Evolution Model of Asphalt Concrete for Waterproofing Layer in High-Speed Railways[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 281-288. doi: 10.3969/j.issn.0258-2724.20220335
Citation: LI Jin, SHI Yuefeng, XIAO Xin, LOU Liangwei, CAI Degou, XIAO Feipeng. Freeze-Thaw Damage Evolution Model of Asphalt Concrete for Waterproofing Layer in High-Speed Railways[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 281-288. doi: 10.3969/j.issn.0258-2724.20220335

高铁防水封闭层沥青混凝土冻融损伤演化模型

doi: 10.3969/j.issn.0258-2724.20220335
基金项目: 国家自然科学基金(41972299);中国国家铁路集团有限公司科技研究开发计划(K2020G032)
详细信息
    作者简介:

    李进(1996—),男,博士研究生,研究方向为道路与铁路工程,E-mail:lijin0222@tongji.edu.cn

    通讯作者:

    肖飞鹏(1973—),男,教授,博士生导师,博士,研究方向为道路与铁路工程,E-mail:fpxiao@tongji.edu.cn

  • 中图分类号: U214.3

Freeze-Thaw Damage Evolution Model of Asphalt Concrete for Waterproofing Layer in High-Speed Railways

  • 摘要:

    为研究高速铁路防水封闭层用沥青混凝土(简称铁路沥青混凝土)的冻融损伤演化,制备了选用不同沥青和不同目标级配的4种聚合物复合改性铁路沥青混凝土,分析重复冻融循环作用下多温域宏观力学性能的劣化规律. 构建针对冻融损伤演化模型,并对反复冻融循环作用下的损伤度进行计算. 研究发现:4种铁路沥青混凝土在10次冻融循环作用后,各项力学性能指标的残留率均在80%以上;低温断裂能指标对冻融循环次数的增加最为敏感,更能及时反映铁路沥青混凝土的力学性能劣化;基于统计可靠度理论构建的铁路沥青混凝土冻融损伤演化模型的拟合优度值均接近0.99.

     

  • 图 1  试验方案

    Figure 1.  Experimental design

    图 2  铁路沥青混凝土在冻融循环下多温域力学性能残留率

    Figure 2.  Retained rate of mechanical properties of railway asphalt concrete in multiple temperature domains under freeze-thaw cycles

    图 3  冻融循环前后铁路沥青混凝土内部空隙结构的变化

    Figure 3.  Changes in internal voids structure of railway asphalt concrete before and after freeze-thaw cycles

    图 4  铁路沥青混凝土各项力学性能指标的相关性矩阵

    Figure 4.  Correlation matrix of mechanical property indexes of railway asphalt concrete

    图 5  冻融损伤演化模型示意

    Figure 5.  Illustration of freeze-thaw damage evolution model

    图 6  铁路沥青混凝土在重复冻融循环作用下试验测定和模型预估的损伤度

    Figure 6.  Measured and predicted damage degree of railway asphalt concrete under freeze-thaw cycles

    表  1  铁路沥青混凝土在冻融循环作用下的多温域力学性能劣化规律

    Table  1.   Deterioration of mechanical properties of railway asphalt concrete in multiple temperature domains under freeze-thaw cycles

    铁路沥青混
    凝土类型
    冻融循环
    次数/次
    高温马歇尔稳定度/kN中温劈裂强度/MPa 低温
    断裂能/(J·m−2断裂韧性/(N·mm−1
    A-AC13015.171.332 1613.3145.04
    514.531.2861544.3543.83
    1012.421.2041425.6341.79
    1511.411.2351387.0641.49
    2011.521.2461283.2941.35
    A-AC10016.961.3701775.9047.77
    515.231.3571550.5546.19
    1013.851.2821457.3546.28
    1513.951.3171300.8045.26
    2011.951.3501190.7544.56
    B-AC13013.641.1001816.1550.20
    512.971.0201624.4649.80
    1010.360.9571561.4547.02
    159.990.9971466.0847.70
    209.791.0211362.2245.66
    B-AC10014.761.1182017.6852.17
    513.281.0631898.6448.68
    1011.500.9861691.9947.22
    1510.761.0301572.8546.91
    2010.761.0791498.5448.04
    下载: 导出CSV

    表  2  铁路沥青混凝土冻融损伤演化模型参数拟合结果

    Table  2.   Fitted parameters of freeze-thaw damage evolution model of railway asphalt concrete

    沥青混凝土类型$ \alpha $$ {\lambda _0} $$ \nu $/×10−7判定系数
    A-AC131.03270.011510.10.9841
    A-AC100.73110.013590.10.9859
    B-AC130.75410.009150.10.9888
    B-AC100.99020.012900.10.9827
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-05-07
  • 修回日期:  2022-11-30
  • 网络出版日期:  2023-11-03
  • 刊出日期:  2022-12-01

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