2018 Volume 25 Issue 98 Pages 98_67-98_79
Sometimes high water flow scours bridge piers to reduce safety of bridge. To keep safety, suitable inspection is required. Unfortunately, it is difficult to inspect all bridges because a local government has many bridges and does not have enough inspectors. So, a reliable monitoring system should be developed. In this paper, a new inspection technique estimating amplitude ratio as a index of scour was proposed and tested at a existing bridge. We installed vibration sensors on two piers and checked its difference between two piers. Finally,our experiment showed good correlation between reduction of amplitude ratio and scour.