水泥混凝土路面板湿度梯度模拟与分析

高翔; 魏亚

doi:10.6052/j.issn.1000-4750.2013.03.0225

水泥混凝土路面板湿度梯度模拟与分析

高翔^{1, 2},
魏亚^2,

1.
交通运输部公路科学研究院,北京 100088;
2.
清华大学土木工程系,北京 100084

基金项目: 国家自然科学基金项目(51108246); 交通运输部西部交通科技项目(2011318223710); 云南省交通厅科技项目(云交科2013(A)06,(C)02)

详细信息

作者简介:
高翔(1988―),男,山西人,硕士生,主要从事结构材料及道路工程研究(E-mail: gaoxiang0601@gmail.com).

通讯作者:
魏亚(1976―),女,河南人,副教授,博士,主要从事结构材料及道路工程研究(E-mail: yawei@mail.tsinghua.edu.cn).

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- 文章访问数: 311
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出版历程
- 收稿日期: 2013-03-18
- 修回日期: 2013-11-14
- 刊出日期: 2014-08-24

MODELING AND ANALYSIS OF MOISTURE GRADIENTS IN CONCRETE PAVEMENTS

GAO Xiang^{1, 2},
WEI Ya^2,

1.
Research Institute of Highway, Ministry of Transport, Beijing 100088, China;
2.
Department of Civil Engineering, Tsinghua University, Beijing 100084, China

摘要

摘要: 水泥混凝土路面板在湿度梯度影响下会发生翘曲变形,若与荷载耦合会导致早期结构性断裂。由于缺乏对混凝土路面板内部湿度梯度分布进行量化分析的有效方法,在路面设计中往往不考虑湿度梯度的影响,从而忽略了引起板早期破坏的一个重要因素。该文基于板内湿度分布是外界环境影响和混凝土内部自干燥的耦合作用结果,考虑水灰比、环境湿度和混凝土内部水分传输性质等影响因素,提出了混凝土板内湿度梯度定量分析方法,对典型情况下板内湿度梯度进行模拟,并与实测湿度数据比较。采用等效温度梯度ΔT_e定量比拟湿度梯度,以分析其对板翘曲变形和应力的影响。研究结果可以为设计、铺筑长寿命路面提供参考依据。
- 水泥混凝土路面 /
- 湿度梯度 /
- 外部干燥 /
- 板底吸水 /
- 自干燥 /
- 等效温度梯度
Abstract: Combined effects from truck loading and warping due to moisture gradient can cause cracking in concrete pavements. Lack of comprehensive knowledge on moisture properties hampers the proper evaluation and accurate calculation of moisture effects in pavement design. This paper discusses the influence of water-cement ratio, environmental humidity and water transport properties on moisture distribution in concrete slabs, and describes the processes of external drying, absorption and self-desiccation. A model is proposed to simulate the moisture gradient distribution along slab depth and compared with experimental measurements. The equivalent temperature gradient ΔT_e is used to mimic the moisture gradient and to calculate its effect on warping. The results of this study can provide insights and a valuable reference for the design and construction of perpetual pavements.
- concrete pavements /
- moisture gradient /
- external drying /
- absorption /
- self-desiccation /
- equivalent temperature gradient

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参考文献(16)

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文章访问数: 311
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水泥混凝土路面板湿度梯度模拟与分析

作者简介: 高翔(1988―),男,山西人,硕士生,主要从事结构材料及道路工程研究(E-mail: gaoxiang0601@gmail.com).

通讯作者: 魏亚(1976―),女,河南人,副教授,博士,主要从事结构材料及道路工程研究(E-mail: yawei@mail.tsinghua.edu.cn).

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出版历程

MODELING AND ANALYSIS OF MOISTURE GRADIENTS IN CONCRETE PAVEMENTS

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目录

作者简介:
高翔(1988―),男,山西人,硕士生,主要从事结构材料及道路工程研究(E-mail: gaoxiang0601@gmail.com).

通讯作者:
魏亚(1976―),女,河南人,副教授,博士,主要从事结构材料及道路工程研究(E-mail: yawei@mail.tsinghua.edu.cn).