A fundamental study on bridge vibration effects during video-based 3D point cloud construction

Abstract

In this study, the effects of bridge vibration on constructing an image-based point cloud have been investigated fundamentally, focusing on the fact that bridges con-stantly vibrate due to external forces such as traffic and wind. A 3D point cloud is expected to be used to construct FE models and to obtain detailed models in line with the current state of structures, yet the vibration of a target is not considered when constructing the point cloud data. In this study, in image-based point cloud construction, where the target needs to be photographed from various distances and angles, bridge vibration is acquired by video analysis, and an attempt is made to construct 3D point cloud data that reduces the effect of vibration at each photo-graphed position by using reference position frames.