Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed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

Dynamic response monitoring of bridge structures has received considerable attention. It is important to synchronously measure both quasi-static and dynamic displacements of bridge structures. However, traditional accelerometer method cannot capture quasi-static displacement component although it can detect dynamic displacement component. To this end, a novel composite instrument of 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. Chebyshev filter and wavelet algorithms were developed to process the composite instrument measurements. Conclusions were drawn that the measurement noise of the composite instrument 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 to 2.5 mm, the composite instrument accurately identified their quasi-static and dynamic displacements. The composite instrument will be a potential tool for structural dynamic monitoring with the enhancement of its overall performance.

Subject Areas

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

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