Ground-Penetrating Radar Investigation of Salvaged Timber Girders from Bridges Along Route 66 in California

IF 0.8 4区 工程技术 Q3 FORESTRY Wood and Fiber Science Pub Date : 2020-01-28 DOI:10.22382/wfs-2020-007
Xi Wu, C. A. Senalik, J. Wacker, Xiping Wang, Guanghui Li
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引用次数: 4

Abstract

This study describes assessment of the internal conditions of timber bridge structural members along Route 66 in California. These timber bridges were exposed to desert climate conditions for several decades, which can lead to a variety of deterioration. Overtime, the deterioration may cause loss of structural integrity within the bridges and lead to potentially hazardous conditions for the motoring public. Members from dismantled bridges were brought to the Forest Products Laboratory in Madison, WI. Strength-reducing features including decay, splits and cracks insect attack, and corrosion of metal components were initially identified using visual inspection. Further assessment was then performed using several nondestructive testing technologies including ground=penetrating radar (GPR). GPR was used, among other nondestructive techniques, to identify and locate internal features and defects within the timbers. The tomographic output of the GPR known as radargrams, revealed deterioration. Based on the information contained within the radargrams, it was possible to classify some internal features and defects with a high degree of certainty, whereas others remained less clear. In this study, the potential of using GPR for inspection of bridge timbers is discussed and supported through interpretation of the radargrams.
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加州66号公路沿线桥梁打捞木梁的探地雷达调查
本研究描述了加州66号公路木桥结构构件内部状况的评估。这些木桥暴露在沙漠气候条件下几十年,这可能导致各种退化。随着时间的推移,这种恶化可能会导致桥梁内部结构完整性的丧失,并对驾车的公众造成潜在的危险。拆除桥梁的成员被带到威斯康星州麦迪逊市的森林产品实验室。强度降低的特征包括腐烂、裂缝、昆虫攻击和金属部件的腐蚀,最初是通过目视检查确定的。然后使用几种无损检测技术进行进一步评估,包括探地雷达(GPR)。除其他非破坏性技术外,还使用探地雷达来识别和定位木材的内部特征和缺陷。探地雷达的层析成像输出也就是雷达图显示了情况的恶化。基于图中包含的信息,可以高度确定地对一些内部特征和缺陷进行分类,而其他的则不太清楚。在本研究中,通过对雷达图的解释,讨论并支持使用探地雷达检测桥梁木材的潜力。
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来源期刊
Wood and Fiber Science
Wood and Fiber Science 工程技术-材料科学:纺织
CiteScore
7.50
自引率
0.00%
发文量
23
审稿时长
>12 weeks
期刊介绍: W&FS SCIENTIFIC ARTICLES INCLUDE THESE TOPIC AREAS: -Wood and Lignocellulosic Materials- Biomaterials- Timber Structures and Engineering- Biology- Nano-technology- Natural Fiber Composites- Timber Treatment and Harvesting- Botany- Mycology- Adhesives and Bioresins- Business Management and Marketing- Operations Research. SWST members have access to all full-text electronic versions of current and past Wood and Fiber Science issues.
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