Reliability method and subentry coefficients of fatigue design for military bridge

In order to improve the performance of military bridge,the resistances and loads were analysed by calculating the security level of eight bridges based on the theory of structural reliability. With the method of weighting average,index of goal reliability for fatigue was dealt with. Formula of fatigue design for military bridge was presented. Subentry coefficients were suggested. The results show that the method is feasible and applicable in recension of design criterion.