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http://dx.doi.org/10.12989/sss.2011.7.2.083

In-construction vibration monitoring of a super-tall structure using a long-range wireless sensing system  

Ni, Y.Q. (Department of Civil and Structural Engineering, The Hong Kong Polytechnic University)
Li, B. (Department of Civil and Structural Engineering, The Hong Kong Polytechnic University)
Lam, K.H. (Department of Civil and Structural Engineering, The Hong Kong Polytechnic University)
Zhu, D.P. (School of Civil and Environmental Engineering, Georgia Institute of Technology)
Wang, Y. (School of Civil and Environmental Engineering, Georgia Institute of Technology)
Lynch, J.P. (Department of Civil and Environmental Engineering, University of Michigan)
Law, K.H. (Department of Civil and Environmental Engineering, Stanford University)
Publication Information
Smart Structures and Systems / v.7, no.2, 2011 , pp. 83-102 More about this Journal
Abstract
As a testbed for various structural health monitoring (SHM) technologies, a super-tall structure - the 610 m-tall Guangzhou Television and Sightseeing Tower (GTST) in southern China - is currently under construction. This study aims to explore state-of-the-art wireless sensing technologies for monitoring the ambient vibration of such a super-tall structure during construction. The very nature of wireless sensing frees the system from the need for extensive cabling and renders the system suitable for use on construction sites where conditions continuously change. On the other hand, unique technical hurdles exist when deploying wireless sensors in real-life structural monitoring applications. For example, the low-frequency and low-amplitude ambient vibration of the GTST poses significant challenges to sensor signal conditioning and digitization. Reliable wireless transmission over long distances is another technical challenge when utilized in such a super-tall structure. In this study, wireless sensing measurements are conducted at multiple heights of the GTST tower. Data transmission between a wireless sensing device installed at the upper levels of the tower and a base station located at the ground level (a distance that exceeds 443 m) is implemented. To verify the quality of the wireless measurements, the wireless data is compared with data collected by a conventional cable-based monitoring system. This preliminary study demonstrates that wireless sensing technologies have the capability of monitoring the low-amplitude and low-frequency ambient vibration of a super-tall and slender structure like the GTST.
Keywords
wireless sensing; super-tall structure; ambient vibration; structural health monitoring (SHM); in-construction monitoring;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
Times Cited By Web Of Science : 7  (Related Records In Web of Science)
Times Cited By SCOPUS : 11
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