The following structure is proposed as first trial for the design of a new infrastructure: |...

 

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The following structure is proposed as first trial for the design of a new infrastructure: | Layer 1- HMA: 5 cm, E = 2000 MPa, PR = 0.45 Layer 2 - HMA, 10 cm, E = 1800 MPa, Poisson ratio = 0.45 I Layer 3 - Unbound Base, 20 cm, E = 200 MPa, PR = 0.25 Layer 4 - Subgrade, semi-infinite, E = 140 MPa, Poisson ratio = 0.25 The results of the damage analysis following the Asphalt Institute methodology are: DAMAGE RATIO AT BOTTOM OF LAYER 2 = 3.207 DAMAGE RATIO AT TOP OF LAYER 4= 1.089 MAXIMUM DAMAGE RATIO = 3.207. Describe why the structure needs to be redesigned, and how it can be modified. %3D The following structure is proposed as first trial for the design of a new infrastructure: | Layer 1- HMA: 5 cm, E = 2000 MPa, PR = 0.45 Layer 2 - HMA, 10 cm, E = 1800 MPa, Poisson ratio = 0.45 I Layer 3 - Unbound Base, 20 cm, E = 200 MPa, PR = 0.25 Layer 4 - Subgrade, semi-infinite, E = 140 MPa, Poisson ratio = 0.25 The results of the damage analysis following the Asphalt Institute methodology are: DAMAGE RATIO AT BOTTOM OF LAYER 2 = 3.207 DAMAGE RATIO AT TOP OF LAYER 4= 1.089 MAXIMUM DAMAGE RATIO = 3.207. Describe why the structure needs to be redesigned, and how it can be modified. %3D

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The structure needs to be redesigned because the damage ratio at the bottom of layer 2 is grea... View the full answer