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.
Original language | English |
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Pages (from-to) | 252-264 |
Number of pages | 13 |
Journal | ISPRS Journal of Photogrammetry and Remote Sensing |
Volume | 138 |
DOIs | |
Publication status | Published - Apr 2018 |
Keywords
- Displacements
- Dynamics
- Long-span bridge
- Microwave radar interferometer
- Structural health monitoring (SHM)
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Engineering (miscellaneous)
- Computer Science Applications
- Computers in Earth Sciences