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The Scientific World Journal
Volume 2013 (2013), Article ID 303656, 14 pages
http://dx.doi.org/10.1155/2013/303656
Research Article

Online Bridge Crack Monitoring with Smart Film

Department of Information Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China

Received 30 August 2013; Accepted 17 October 2013

Academic Editors: D. G. Aggelis and N. Alver

Copyright © 2013 Benniu Zhang et al. 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.

Abstract

Smart film crack monitoring method, which can be used for detecting initiation, length, width, shape, location, and propagation of cracks on real bridges, is proposed. Firstly, the fabrication of the smart film is developed. Then the feasibility of the method is analyzed and verified by the mechanical sensing character of the smart film under the two conditions of normal strain and crack initiation. Meanwhile, the coupling interference between parallel enameled wires of the smart film is discussed, and then low-frequency detecting signal and the custom communication protocol are used to decrease interference. On this basis, crack monitoring system with smart film is designed, where the collected crack data is sent to the remote monitoring center and the cracks are simulated and recurred. Finally, the monitoring system is applied to six bridges, and the effects are discussed.