Research on Application of System Reliability of Simple Supported Beam Bridge Based on Transverse Load Distribution

In order to get the failure probability based system reliability and seek the relation between the component reliability and system reliability,a new calculation and analytical method was put forward.Calculation of system reliability was divided into two parts on the basis of existing failure mode,i.e.,to calculate invalidation coefficient based on transverse load-distributing influence lines and failure probability of single beam based on component reliability.To the main failure mode of beam bridge structure,which is the most important failure mode of beam bridge,invalidation coefficient of system from articulated state was calculated systematically based on experimental model.Compared with the commonly used methods,the analysis shows that the new method is feasible.System reliability of transverse connection with damage can be effective resolved,because the method which calculating invalidation coefficient using transverse load-distributing influence lines considers the effect of beam position.