| The design of ballastless track usually does not consider the influence of the structure fatigue in our Country. Actually,the ballastless track slab structure bears the cycle force influence,such as vertical force from the wheel and so on. It is possible that the slab will occur fatigue destroy during it is using age. So,it has an important significance to research the fatigue damage and life of the slab.The simulation on computer can experiment repeatedly,has the advantage of small investment and risk-free and repeatedly,it is a effective tool to study the high-speed railway. This paper mainly introduced the stress state analysis and fatigue cumulative damage theory and damage detection principle of the slab. By the method of S-N curve estimate fatigue life of the slab. Based finite element software ABAQUS and FATIGUE and fatigue cumulative damage theory to study the Rheda2000 ballastless track slab on the 24m alone hole bridge. Content as follows:1.Under the condition of passenger dedicated line transport,the train Pass through the slab with 300km/h,analysis the stress situation of the slab. 2.Based the stress situation of the slab,study the fatigue life under the condition of passenger dedicated line transport.Based on the research of simulation,the cloud pictures of the Rheda2000 ballastless track slab were generated under the cycle force,Then the frail area of fatigue damage and the reason for the fatigue damage were analyzed.
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