Abstract
The cable safety factor for cable-supported bridges in Japan is higher for other bridge members. The main reason is that the reliability of cable fatigue damage is not clear. We pay attention to cable fatigue damage due to live loadings, and investigate the relationship between cable fatigue damage and the safety factor of stay cables. We tentatively designed three-span continuous steel cable-stayed bridges by changing the cable safety factor and the center span length. The fatigue damage to the stay cables caused by random traffic flows was evaluated by Monte Carlo simulation. We arrived at the conclusion that the possibility of reduction of the cable safety factor is suggested in viewpoint of the fatigue safety.
