Application of the Euler Motion Amplification Algorithm to Bridge Vibration Analysis

In this study, the Euler subtle motion amplification (MA) algorithm is applied to bridge vibration analysis. First, a series of digital images of bridge structures is continuously captured using an ordinary digital camera. Then, the micro-vibration of the bridge is amplified using the related algorithm of Euler MA. The time history image of the bridge specimen under conventional video sampling frequency is obtained by decomposing the amplified digital image. Lastly, the holographic dynamic displacement measurement results of the test bridge are obtained by analyzing the edge features of the marking points in the image sequences. The proposed analysis method is feasible compared with the displacement sensor and dial indicator. It can meet the application requirements of bridge dynamic displacement measurement. It can also perform preliminary quantitative analysis of several vibration characteristics of bridges and identify the micro-vibration displacements of a bridge structure.