Application of Optical Imaging Methods for Monitoring Vibrations of Bridge Road Structures

Abstract

The paper discusses methods for non-contact optical diagnostics of the condition of span constructions of bridge structures. A comparison was made of the capabilities of visualizing vibrations using the laser speckle image correlation method and the photomodulation holographic method when conducting tests on a road bridge. The results of visualization of various traffic conditions of the bridge over the Burunduk channel on the Tomsk bypass road were obtained and analyzed. Relative movements were determined and frequency analysis of vibrations of the span of the bridge structure was carried out. Analysis of the results of the experiments confirmed the possibility and effectiveness of using the photomodulation holographic method for visualizing the movements and vibrations of road infrastructure construction objects.