Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/77934
Title: Dynamic displacement monitoring of long-span bridges with a microwave radar interferometer
Authors: Zhang, B 
Ding, X 
Werner, C
Tan, K 
Zhang, B 
Jiang, M
Zhao, J 
Xu, Y 
Keywords: Displacements
Dynamics
Long-span bridge
Microwave radar interferometer
Structural health monitoring (SHM)
Issue Date: 2018
Publisher: Elsevier
Source: ISPRS journal of photogrammetry and remote sensing, 2018, v. 138, p. 252-264 How to cite?
Journal: ISPRS journal of photogrammetry and remote sensing 
Abstract: Structural health monitoring of long-span bridges is a critical process in ensuring the operational safety of the structures. In this paper, we present experimental results of monitoring the displacements of two long-span bridges in Hong Kong Ting Kau Bridge (TKB) and Tsing Ma Bridge (TMB) with a terrestrial microwave radar interferometer named the GAMMA Portable Radar Interferometer (GPRI). A technique for fusing the measurements from two receiving antennas of the radar instrument is proposed. In addition, a two-step phase unwrapping approach is also tested. The results reveal the bridge dynamic responses under different loading conditions, including winds, vehicle traffic, and passing trains. The results also show that the terrestrial microwave radar interferometer can be used to monitor the dynamics of long-span bridges with unprecedented spatial and temporal resolutions.
URI: http://hdl.handle.net/10397/77934
ISSN: 0924-2716
DOI: 10.1016/j.isprsjprs.2018.02.020
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