To model and analyze a fiber-reinforced rigid pavement you may consider some equivalent effects and equivalent locations and start to model it Like the model that I proposed in some of my papers like the following recently published paper of mine for RC members:
Article Analysis of RC Beam-Columns Subjected to Monotonic and Cycli...
However, the rigid pavement is under local bending and shear in its cross-section.
I hope you find a novel model to model and analyze a fiber-reinforced rigid pavement.
By searching my name you can find my other papers that are for different types of bending and modeling.