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Advances in the use of thermographic imaging for the condition assessment of bridges

机译：热成像技术在桥梁状况评估中的应用进展

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Thermal imaging can be used to image subsurface damage resulting from the corrosion of embedded reinforcing steel. which typically manifests as delaminations at or near the level of the reinforcing steel. Delaminations interrupt the heat transfer through the concrete, resulting in surface temperature variations that can be assessed using thermal cameras. This type of damage occurs in bridge decks, soffits, parapets, abutments and other concrete bridge components. This paper will discuss advances in the application of thermal imaging for the condition assessment of concrete bridge components, focusing on applications to the areas of the bridge not exposed to the radiant heating of the sun. Research results describing ambient temperature variations and inspection timing requirements for conducting thermal inspections are presented. Research exploring the effects of environmental parameters on the ability to image subsurface defects (delaminations) at different depths in concrete is also discussed.
机译：热成像可用于成像由于嵌入的钢筋腐蚀而引起的地下破坏。通常表现为在钢筋水平或附近的分层。分层会中断通过混凝土的热传递，导致表面温度变化，可以使用热像仪进行评估。这种类型的损坏发生在桥面，拱腹，护墙，桥台和其他混凝土桥梁构件中。本文将讨论热成像技术在混凝土桥梁构件状态评估中的应用进展，重点是对未暴露于太阳辐射热的桥梁区域的应用。提出了描述环境温度变化和进行热检查的检查时间要求的研究结果。还探讨了探索环境参数对混凝土中不同深度的地下缺陷（分层）成像能力的影响的研究。

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