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Technical Note

Measurement of Quasi-Static and Dynamic Displacements of Footbridges Using the Composite Instrument of a Smartstation and an Accelerometer: Case Studies

1
Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha 410082, China
2
Nottingham Geospatial Institute/Sino-UK Geospatial Engineering Centre, The University of Nottingham, Nottingham NG7 2TU, UK
3
Jiangsu Hydraulic Research Institute, Nanjing 210017, China
4
College of Civil Engineering, Fuzhou University, Fuzhou 350116, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(16), 2635; https://doi.org/10.3390/rs12162635
Received: 19 July 2020 / Revised: 9 August 2020 / Accepted: 13 August 2020 / Published: 15 August 2020
Monitoring the dynamic responses of bridge structures has received considerable attention. It is important to synchronously measure both the quasi-static and dynamic displacements of bridge structures. However, the traditional accelerometer method cannot capture the quasi-static displacement component, although it can detect the dynamic displacement component. To this end, a novel composite instrument of a smartstation was proposed to monitor vibration displacements of footbridges. Full-scale experiments were conducted on a footbridge to validate the feasibility of the composite instrument-based monitoring method. A Chebyshev filter and wavelet algorithms were developed to process the composite instrument measurements. It was concluded that the measurement noise of the composite instrument was mainly distributed in a frequency range of 0–0.1 Hz. In two case studies with displacement peaks of 5.7–10.0 mm and 1.3– 2.5 mm, the composite instrument accurately identified the quasi-static and dynamic displacements. The composite instrument will be a potential tool for monitoring structural dynamics because of its enhanced overall performance. View Full-Text
Keywords: composite instrument of a smartstation; accelerometer; dynamic displacement; vibration frequency; structural health monitoring composite instrument of a smartstation; accelerometer; dynamic displacement; vibration frequency; structural health monitoring
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MDPI and ACS Style

Yu, J.; Fang, Z.; Meng, X.; Xie, Y.; Fan, Q. Measurement of Quasi-Static and Dynamic Displacements of Footbridges Using the Composite Instrument of a Smartstation and an Accelerometer: Case Studies. Remote Sens. 2020, 12, 2635. https://doi.org/10.3390/rs12162635

AMA Style

Yu J, Fang Z, Meng X, Xie Y, Fan Q. Measurement of Quasi-Static and Dynamic Displacements of Footbridges Using the Composite Instrument of a Smartstation and an Accelerometer: Case Studies. Remote Sensing. 2020; 12(16):2635. https://doi.org/10.3390/rs12162635

Chicago/Turabian Style

Yu, Jiayong, Zhen Fang, Xiaolin Meng, Yilin Xie, and Qian Fan. 2020. "Measurement of Quasi-Static and Dynamic Displacements of Footbridges Using the Composite Instrument of a Smartstation and an Accelerometer: Case Studies" Remote Sensing 12, no. 16: 2635. https://doi.org/10.3390/rs12162635

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