2020 Volume 76 Issue 2 Pages I_19-I_33
With the increase of natural disasters and the scale-up of disasters in recent years, there is a movement to understand the impact of natural disasters in bridge maintenance plan due to the need to explain to residents. Although external forces due to natural disasters have been taken into consideration at the time of design, external forces and environmental conditions surrounding bridges may change during the maintenance period. In addition, it is difficult to clearly explain how much strength and margin the applicable bridge can withstand natural disasters.
In this study, it will be considered the natural disaster influencing factors that should be considered in the bridge maintenance plan. RFND (Rating Factor with Natural Disasters) is defined as an index that expresses the resistance to natural disasters. Existing bridges are classified by using them as an index to judge the resistance to major natural disasters. RFND is calculated for each bridge, the characteristics are grasped, and the current situation of existing bridges is analyzed by grouping. Finally, it will be discussed the relationship between the usage of RFND and the bridge maintenance plan.
