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首页> 外文期刊>Journal of Infrastructure Systems >Capture and Quantification of Deterioration Progression in Concrete Bridge Decks through Periodical NDE Surveys
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Capture and Quantification of Deterioration Progression in Concrete Bridge Decks through Periodical NDE Surveys

机译：通过定期的NDE调查来捕获和量化混凝土桥梁甲板中的恶化进度

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Monitoring the condition of concrete bridge decks is essential because bridge decks are deteriorating faster than other bridge components. This study concentrated on bridge deck condition assessment using complementary nondestructive evaluation (NDE) techniques. The assessment had three main components: evaluation of the corrosive environment and corrosion processes, concrete degradation evaluation, and assessment with respect to deck delamination. Five NDE techniques were used: impact echo (IE) to detect and characterize delamination, ground-penetrating radar (GPR) to describe the corrosive environment, measurement of the concrete cover and description of its overall condition, half-cell potential (HCP) to assess corrosion activity, ultrasonic surface waves (USW) to describe concrete quality, and electrical resistivity (ER) to estimate corrosion rate. The ability of NDE methods to objectively characterize deterioration progression is illustrated by the results from four NDE surveys of a bridge in Virginia during a period of five and a half years. The results, which include condition maps and condition indices, demonstrate the ability of NDE technologies to accurately and objectively detect and quantify deterioration progression. Results from periodical NDE surveys show a high potential for development of more realistic deterioration and lifecycle cost models for bridge decks. (C) 2016 American Society of Civil Engineers.
机译：监测混凝土桥面的状况至关重要，因为桥面的劣化速度比其他桥梁组件要快。这项研究集中在使用补充性无损评估（NDE）技术的桥面状况评估上。该评估包括三个主要部分：对腐蚀环境和腐蚀过程的评估，对混凝土降解的评估以及对甲板分层的评估。使用了五种NDE技术：冲击回波（IE）以检测和表征分层，探地雷达（GPR）以描述腐蚀环境，混凝土覆盖层的测量和整体状况的描述，半电池电位（HCP）评估腐蚀活性，描述混凝土质量的超声波表面波（USW）和评估腐蚀速率的电阻率（ER）。在弗吉尼亚州一座桥梁的五年半的时间里，四次NDE调查结果表明，NDE方法能够客观地描述恶化进程的能力。结果（包括条件图和条件索引）证明了NDE技术能够准确，客观地检测和量化恶化进程。定期无损检测调查的结果表明，有可能开发出更现实的桥面板劣化和生命周期成本模型。 （C）2016年美国土木工程师学会。

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