Damage Detection in Active Suspension Bridges: An Experimental Investigation

Sensors

David Alaluf¹  André Preumont¹  Bilal Mokrani²  Fanhao Meng³  Jingjun Yu³ 

[1] Active Structures Laboratory, Université Libre de Bruxelles, 1050 Brussels, Belgium;Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool L69 3BX, UK;Robotics Institute, Beihang University, 100191 Beijing, China;

关键词: damage detection;    active cable;    Hilbert–Huang transform;    suspension bridges, health monitoring;   

DOI  :  10.3390/s18093002

来源: DOAJ

【 摘 要 】

This paper considers a Hilbert marginal spectrum-based approach to health monitoring of active suspension bridge hangers. The paper proposes to takes advantage of the presence of active cables and use them as an excitation mean of the bridge, while they are used for active damping. The Hilbert–Huang transform is used to calculate the Hilbert marginal spectrum and establish a damage index for each hanger of the suspension bridge. The paper aims to investigate the method experimentally, through a series of damage scenarios, on a laboratory suspension bridge mock-up equipped with four active cables; each active cable is made of a displacement actuator collocated with a force sensor. Different locations and levels of damage severity are implemented. For the first time, the investigation demonstrates experimentally the effectiveness of the technique, as well as its limitations, to detect and locate the damage in hangers of a suspension bridge.

【 授权许可】

Unknown