Shin Geo-Je Bridge needs new inspection holes to improve the accessibility for various maintenances. This study evaluated the maximum von mises stresses(SE) of the bottom flange when the inspection holes is made with an ellipse shape. The FEM analysis results show that the inspection installation is possible to the inflection point of the girder because buckling phenomenon doesn't occur according to the loading.

Shin Geo-Je Bridge needs new inspection holes to improve the accessibility for various maintenances. This study evaluated the maximum von mises stresses(SE) of the bottom flange when the inspection holes is made with an ellipse shape. The FEM analysis results show that it is reasonable the hole is installed near the inflection point of the girder from a structural safety point of view though additional cost for the inspection walkway