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)
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.
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.
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.
Keywords
composite instrument of smartstation; accelerometer; dynamic displacement; vibration frequency; structural health monitoring
Subject
Engineering, Civil Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Commenter: Jiayong Yu
Commenter's Conflict of Interests: Author