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V. A circular loading is applied on a three-layered asphalt pavement system as shown in the figure below. If the radial tensile strain on the top of the subgrade layer is 215 microstrains, the radial tensile strain at the bottom of the asphalt layer is 304 microstrains, and the vertical compressive stresses at the bottom and top of the base layer are 3.2 psi and 10.8 psi, respectively, answer each of the following questions (30 grades): HMA, E₁ = 250,000 psi h₁ v=0.5 Base, E₂ = 12,500 psi h₂ Subgrade, E3 = 6,250 psi He Note: Use -ve for tension and positive for compression. The required stresses and strains are under the centerline of the wheel load. compressive the bottom 1. The vertical compressive strain (in microstrains) at the bottom of the asphalt layer is 2. The vertical compressive strain (in microstrains) at the top of the base layer equals to 3. The vertical compressive strain (in microstrains) at the bottom of the base layer is 4. The vertical compressive strain (in microstrains) at the top of the subgrade equals to 5. The radial tensile strain (in microstrains) at the top of the base layer equals to 6. The vertical compressive stress (in psi) at the bottom of the asphalt layer is 7. The radial tensile stress (in psi) at the bottom of the asphalt layer is equal to 8. The radial compressive stress (in psi) at the top of the base layer equals to 9. The radial tensile stress (in psi) at the bottom of the base layer equals to 10. The radial compressive stress (in psi) at the top of the subgrade layer is |