Fatigue durability of cable members for road bridges based on the stress amplitude by live loads

Abstract

In this paper, the fatigue durability of cable members in road bridges against live loads is discussed based on the stress amplitude calculated from the actual design data. First, the fatigue effect caused by 100-years live loads was calculated and the stress amplitude by L live loads equivalent to the fatigue effect was obtained using numerical simulation and actual axle load distribution. Then the safety factor of fatigue durability was examined using the design data base. Finally, it was found that the safety factor for the stress amplitude due to the live loads of cable members designed so far varies depending on the type of bridge and each cable.