ABSTRACT
ABSTRACT: Railway Bridge inspections are roughly divided into Initial Inspection, Routine Inspection and In-Depth Inspection. An Initial Inspection is the first inspection of a bridge. A Routine Inspection is an inspection consisting of observations and measurements needed to identify deterioration of damage and any changes of circumstances of a bridge, since the Initial Inspection. If the results of the Routine Inspection show that the identified damage is unsound, an In-Depth Inspection, which is a close-up and hands-on inspection, is conducted to investigate the causes of damage in detail and to take appropriate measures to repair the damage. In order to acquire an optimal maintenance method for a structure in railway bridges, some examples of an In-Depth Inspection are given in this paper and the results are investigated. Moreover, an effective combination of In-Depth Inspections and efficient interval periods between In-Depth Inspections were investigated.
