Fundamental Study on Vibration Extraction of an Integrated Column by Multi Steel Pipes using Video Information

Abstract

The purpose of this study is to discuss vibration extraction of a bridge pier from processed video by a commercial digital camera. The proposed method transforms the video images into the frequency domain and reconstructs them by enlarging the designated frequency bands. Vibration patterns of the target structure are extracted from the magnified video, and vibration characteristics are estimated using statistical methods. To investigate the feasibility of the proposed method, the acceleration of an integrated column by multi steel pipes was measured. Vibration characteristics obtained from the video images are compared with those identified from accelerometers to verify the accuracy of the identification by video images. As a result, it was confirmed that the dominant frequencies identified from the measured accelerations and the frequencies emphasized by the proposed method from the video images are almost identical.