Working Paper Technical Note Version 2 This version is not peer-reviewed

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

Version 1 : Received: 20 July 2020 / Approved: 21 July 2020 / Online: 21 July 2020 (12:25:50 CEST)
Version 2 : Received: 15 August 2020 / Approved: 18 August 2020 / Online: 18 August 2020 (09:45:07 CEST)

A peer-reviewed article of this Preprint also exists.

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. 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.

Journal reference: Remote Sens. 2020, 12, 2635
DOI: 10.3390/rs12162635

Abstract

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.

Subject Areas

composite instrument of smartstation; accelerometer; dynamic displacement; vibration frequency; structural health monitoring

Comments (1)

Comment 1
Received: 18 August 2020
Commenter: Jiayong Yu
Commenter's Conflict of Interests: Author
Comment: published manuscript
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