Author:
Bai Yongsheng,Sezen Halil,Yilmaz Alper,Qin Rongjun
Abstract
AbstractIn this paper, a new framework is proposed for monitoring the dynamic performance of bridges using three different camera placements and a few visual data processing techniques at low cost and high efficiency. A deep learning method validated by an optical flow approach for motion tracking is included in the framework. To verify it, videos taken by stationary cameras of two shaking table tests were processed at first. Then, the vibrations of six pedestrian bridges were measured using structure-mounted, remote, and drone-mounted cameras, respectively. Two techniques, displacement and frequency subtractions, are applied to remove systematic motions of cameras and to capture the natural frequencies of the tested structures. Measurements on these bridges were compared with the data from wireless accelerometers and structural analysis. Influences of critical parameters for camera setting and data processing, such as video frame rates, data window size, and data sampling rates, were also studied carefully. The research results show that the vibrations and frequencies of structures on the shaking tables and existing bridges can be captured accurately with the proposed framework. These camera placements and data processing techniques can be successfully used for monitoring their dynamic performance.
Funder
Directorate for Engineering
Publisher
Springer Science and Business Media LLC
Cited by
2 articles.
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1. Assessment and monitoring of bridges using various camera placements and structural analysis;Journal of Civil Structural Health Monitoring;2023-11-02
2. Research on Pedestrian Detection and Head Counting Algorithm Based on Computer Vision;2023 2nd International Conference on Artificial Intelligence and Intelligent Information Processing (AIIIP);2023-10-27