Distributed Displacement Response Investigation Technique for Bridge Structures Using Smartphones
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 4
Abstract
The vertical displacement of a cross section of a bridge has a close correlation with the carrying capacity and the ability to resist dynamic loads. Therefore it has been one of the most important parameters for structural health monitoring and safety assessment. Moreover, when a natural disaster such as a hurricane or an earthquake occurs, a large number of bridges will be affected. To evaluate safety performance and investigate failures preliminarily, rapid inspections of displacement are essential for bridges. This paper presents a bridge distributed displacement investigation technique using smartphones. This smartphone-based technique is a beneficial complement to conventional structural health monitoring techniques for its cost efficiency and operability. Based on photogrammetry technology, an algorithm is used to develop an app called D-Viewer. Multipoint dynamic displacement monitoring is implemented synchronously using smartphones. Experiments conducted in the laboratory with reduced-scale models show that this technique is able to monitor the distributed displacement response with reasonable precision. Through data processing, performance of bridges will be evaluated. Low cost and convenience of this technique make it possible for anyone to monitor or inspect the displacement of every short and medium span bridge preliminarily.
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Acknowledgments
The authors acknowledge the financial supports of National Natural Science Foundation of China (51278085, 51221961).
Conflicts of Interest
The authors declare no conflict of interest.
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Information & Authors
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 4 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jun 8, 2016
Accepted: Dec 6, 2016
Published ahead of print: Feb 26, 2017
Published online: Feb 27, 2017
Discussion open until: Jul 27, 2017
Published in print: Aug 1, 2017
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