Prediction of service life of pre-stressed concrete bridge by Fault Tree Analysis model

“Fault Tree Analysis” uses the logical model and mapping methods to analyse, calculate or estimate the probability of phylogenetic. Thus, the reliability of the system, safety and risk could be assessed. They have been widely used in system´s reliability study and to quantify the correlation of potential risk of the system. In the existing of reliability analysis, the time factor generally doesn´t need to be taken into account. However, composition properties of the materials decrease would lead to the reduction of the level of structural reliability. Therefore, structure´s reliability is actually an amount of time-varying. Comprehensive consideration of the above factors, the analysis of a variety of factors will impact on the service life of pre-stressed concrete girder bridge, to build bridge structure analysis model. From the calculation of time-varying structure system´s reliability, the service life of bridge could be evaluated to find safety and reliability of structure.