2017 Volume 73 Issue 5 Pages I_323-I_330
Recently, the study of extending the service life of bridges has gained attention. Many bridges have been built during high economic-growth periods, and have reached their service life. Therefore, their rebuilding and the extending of their service life must be considered. Within this situation, local municipal governments are also conducting regular inspections once every five years as part of preventative maintenance, rather than performing corrective maintenance. In this study, we will shed light on which bridges are most prone to rapid deterioration by using data from the regular inspection of bridges. We will do this by calculating the deterioration rate from inspection data from two inspection cycles in order to determine the environmental factors that affect the deterioration rate. In regards to analysis methods, we used Hayashi's Quantification Method Type I to examine the level of influence each factor has on the deterioration rate of concrete girder.