Stress measurements of the newly built Koubo dam radial gates No.2 and No.3 were executed to obtain stress values in non-deteriorated condition for the future maintenance. While paying attention to the axial stress of arm near the trunnion pin, observed data were compared with FEM analysis results using the unified model that trunnion girder becomes a part of radial gate leaf. In addition, the reductive characteristics of load bearing ability in the future according to corrosion were examined analytically, and the necessity of thinking of trunnion girder as a part of radial gate leaves and consideration points in maintenance were investigated.
