NDLI: Study on microtremor spectrum properties of tunnel lining

Content Provider	IEEE Xplore Digital Library
Author	Yang Gao Yujing Jiang Bo Li Yamauchi, Y.
Copyright Year	2012
Description	Author affiliation: Dept. of Civil Eng., Nagasaki University, Japan (Yang Gao; Yujing Jiang; Bo Li) \|\| Akebono, Sawara-ku, Fukuoka 814-0004, Japan (Yamauchi, Y.)
Abstract	A large number of tunnels in the world have been in service for several decades, and their health conditions deteriorate with the increasing service ages. Therefore, the effective inspection methods are essential to assess the health conditions of tunnels. The method of visual inspection has been commonly utilized to investigate the integrity of lining concrete; however, this method is incapable of providing sufficient information about the inner state of the lining concrete, such as the existence of cracks and cavities. Since the microtremor characteristics of a concrete structure are significantly affected by its damage degree, this feature may serve as an effective method to investigate the health conditions of lining concrete. In this study, in-situ microtremor measurements were performed on three spans of a road tunnel with varying damage degrees, and the microtremors were analyzed at the frequency domain (i.e., power spectral density(PSD)) and time-frequency domain (i.e., the short-time Fourier transform (STFT)). This study suggests that the health condition can be evaluated by comparing the changes of frequency peaks in PSD and STFT, and the damages existing in the concrete cause a larger damping ratio. Therefore, as an initial step, this study gives clear evidence that the microtremor intensity characteristics have strong relation with the health conditions of lining concrete, which has the potential to be used in engineering practices.
Starting Page	1
Ending Page	6
File Size	497967
Page Count	6
File Format	PDF
ISBN	9781467323284
e-ISBN	9781467323307
e-ISBN	9781467323291
DOI	10.1109/ICRERA.2012.6477363
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-11-11
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Damping Time-frequency analysis Health condition Sea measurements Field measurement Concrete Cavity resonators Microtremor Lining concrete Geologic measurements
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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