ABSTRACT
This study explores the use of drive-by monitoring as an alternative to conventional bridge-mounted sensors for monitoring maximum accelerations in railway bridge structures, a key factor in maintaining track ballast stability. Given the extensive rail network and the ongoing development of railway vehicles, traditional methods using bridge sensors require considerable effort, highlighting the need for a more efficient approach. This work analyses data from two field tests, using an ICE 4 train on a bridge with a 19.5 metre span and an ICE TD on a 16.4 metre span bridge, with synchronised acceleration measurements taken from both the train’s axle boxes and the bridge’s main girders. This allows for a direct comparison between the new drive-by approach and a conventional bridge sensor-based approach. Results indicate that axle box acceleration sensors in a drive-by approach are effective in monitoring bridge accelerations.
