Efficient damage inspection of deteriorated RC bridge deck with rain-induced elastic wave. (20th February 2018)

• Record Type: Journal Article
• Authors: Takamine, Hidefumi; Watabe, Kazuo; Miyata, Hirokazu; Asaue, Hisafumi; Nishida, Takahiro; Shiotani, Tomoki
• Is Part Of: Construction & building materials. Volume 162(2018)
• Page Start: 908
• Page End: 913
• Publication Date: 2018-02-20
• Subjects: Acoustic emission -- Non-destructive testing -- Bridge -- Concrete -- Crack -- Inspection -- Rain; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.01.100
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The interior cracks are detected efficiently by measurement over a short period of time. Rain-induced signals, which are usually considered to be noise, are used to detect the cracks. Effectiveness of our method has been verified by the inspection of an in-service highway bridge. Coring results showed that our analysis results using rain-induced signals were correct. Abstract: To maintain a large number of bridges, efficient inspection methods are needed. We have developed a new and efficient method for inspecting reinforced concrete bridge decks by using acoustic emission (AE) monitoring. Notably, we use AE signals acquired during heavy rain, which have generally been considered to be noise in the past. Analysis of rain-induced AE signals reveals severe cracks deep inside a deck, which would have been difficult to recognize by conventional passive non-destructive testing. Our method is also quite efficient with measurements able to be completed in a very short period of time.