Abstract
This is a report on long-term remote monitoring for ascertaining the occurrences of wind-induced vibration in a steel truss bridge. A large crack was found at the bottom of a diagonal member above the middle pier of a long span steel truss bridge. From the findings of investigation, it has been concluded that a fatigue crack appeared firstly and it caused brittle fracture. Hence the principal factor of the fatigue fracture is inferred wind-induced vibration of the member. We had conducted a long-term monitoring to understand wind conditions around the member and to ascertain the occurrences of wind-induced vibration.
