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Finite element analysis of ballastless track slabs reinforced with fiber-reinforced polymer bars

Fiber-reinforced polymer–reinforced ballastless track slabs not only improve the insulation performance but also have advantages in their mechanical properties. The objective of the article is to propose a corresponding design method of the ballastless track slabs considering different parameters by a finite element analysis model. The deformation performance of the ballastless track slabs, as well as the prediction results of several models, was studied considering the different prestress levels, reinforcement ratios, and prestressed materials. The results show that ACI 440.4R-04 and Bischoff models are suggested for predicting the deflection of a ballastless track slab when the prestress level is between 30% and 60% and the Brown and Bartholomew model is suitable for those with a prestress level below 30%.