A study on modal parameter identification of a cable-stayed bridge using acceleration measurement data

Abstract

In this study, dynamic characteristics of a real cable stayed bridge by using vibration data is presented. The following approaches are performed to obtain the objective. Firstly, experimental modal identification methods are selected to extract dynamic characteristics of cable-stayed bridge. Secondly, the target cable-stayed bridge ‘Ting Kau Bridge’ and its dynamic measurement records during normal wind and typhoon-induced heavy wind conditions describe. Thirdly, dynamic characteristics of the target bridge are identified by the eigenvalue analysis on a three dimensional FE model and extracting modal parameters by the selected modal parameter identification techiques. Finally, modal identifiability was assessed by comparison between the numerical and the experimental modal parameters. From the result, the modal characteristics of the cable stayed bridge under ambient vibration conditions were successfully extracted by using the selected experimental modal identification techiques with ambient vibration test.