第５部門③

[2E11-15-04] Fundamental Study on Identification of Fatigue Damage Mechanisms in Web Gap Plate Using Image Sensing

*Chanoknunt Sangsobhon¹, Hidehiko Sekiya¹, Masayuki Tai¹, Shogo Morichika¹, Mizuki Hayama², Masanobu Nagai³ (1. Tokyo City University, 2. Shutoko Technology Center, 3. Metropolitan Expressway Co.,Ltd)

Keywords:Displacement-induced fatigue, Bridge deformation, Image sensing

Most of the fatigue damage in steel bridges is displacement-induced fatigue at the member intersection. To apply
appropriate countermeasure against displacement-induced fatigue, it is important to identify the deformation of
bridge members under live load that causes high strain. This study presents a deformation measurement method
using computer vision-based image sensing technology. The field measurement was performed at actual steel
girders bridge in-service using a 4K video camera. The displacement responses were determined from the recorded
video data.