Vibration Measurement Technique for Cables of Full Aeroelastic Model for CableStayed Bridge Based on Digital Photogrammetry

Abstract:

This paper presents the application of digital photogrammetry in obtaining the vibration response of cables for full aeroelastic cablestayed bridge model in wind tunnel test.In the wind tunnel test,aeroelastic model for a cable stayed bridge with the span of 1 088 m was adopted and the vibration modes for cables during aerodynamic instable status were acquired by image capture and analysis,which clearly revealed the relationship between cable and girder of cable stayed bridge and provided essential data for future research on the mechanism of the flutter of cable stayed bridge with long span.Moreover,the measurement error was discussed and the countermeasures for improving precision were proposed.

Key words:full aeroelastic model test; stay cable; vibration measurement; image recognition