Development and application of a relative displacement sensor for structural health monitoring of composite bridges
Structural Control and Health Monitoring
John Wiley and Sons Ltd
© 2014 John Wiley & Sons, Ltd.
Reason for embargo
Publisher's policy - 12 month embargo from publication of final version
This paper proposes a relative displacement sensor developed to measure directly the relative slip between slab and girder in composite bridges for assessing the health condition of shear connections. The structure, design principle, features, and calibration of the developed relative displacement sensor are presented. The design of the sensor ensures that there are no voltage outputs for the tension, compression, bending, and torsion effects, but only for the relative displacement between the two connecting pads of the sensor. The accuracy of the developed sensor in measuring the relative displacement response and using it for monitoring the conditions of shear connectors was tested on a composite bridge model in the laboratory. Shear connection condition was monitored under ambient vibrations, then static load tests were conducted to introduce cracks into the composite bridge. Both the vertical deflections and relative displacements were used for the crack detection. Experimental studies demonstrate that the developed sensor is very sensitive to the relative displacement and has a decent performance for the structural health monitoring of composite bridges.
Australia Cooperative Research Centre for Infrastructure and Engineering Asset Management (CIEAM-II)
University of Western Australia Research Collaboration Awards
Australian Research Council
"This is the peer reviewed version of the following article: Li J., Hao H., Fan K., and Brownjohn J. (2015) Development and application of a relative displacement sensor for structural health monitoring of composite bridges, Struct. Control Health Monit., 22, 726–742, which has been published in final form at https://dx.doi.org/10.1002/stc.1714. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."
Vol. 22, no 4, pp. 726-742