再生点過程モデルを用いた道路橋の疲労解析

抄録

Very often there are two or more trucks present on the highway bridge, and the effect of their interaction on total fatigue damage to a bridge detail occurs in a non-linear fashion. This interaction-effect in a single-lane loading has been studied in terms of “multiple presence fatigue factor”, γ_M. Explicit analytical expressions have been obtained for γ_M using renewal point process load with equal magnitude. Distribution of the headway distance between successive trucks has been found to have a significant effect on this factor. For normal traffic conditions, it has been found that the interaction effect in a single-lane loading is not so significant, and can be neglected for the practical design purposes.