20.3. Structural models

Try these first

1. 1.

   What is the primary assumption of the layered elastic model?

   Hint

   Think about how material properties are viewed in this model.

2. 2.

   Explain the significance of understanding stress and strain in pavement engineering.

   Hint

   Stress and strain are foundational concepts in material mechanics.

3. 3.

   What does the layered elastic model assume about pavement layers?

   • They vary in composition
   • They are homogeneous and isotropic
   • They behave non-linearly

   Hint

   Think about simplicity in modeling.

4. 4.

   True or False: Visco-elastic models are not used in pavement design.

   • True
   • False

   Hint

   Consider the behavior of materials over time.

5. 5.

   Evaluate how you would choose between a layered elastic and a visco-elastic model for a specific project involving a highway that experiences both heavy truck loads and varying temperatures.

   Hint

   Consider both immediate and sustained loads and how they relate to temperature effects.