What is the critical combination of the stresses at the edge of the pa

1.	What is the critical combination of the stresses at the edge of the pavement during winter?
A.	Load stress warping stress
B.	Load stress + warping stress
C.	Load stress + warping stress + frictional stress
D.	Load stress + warping stress frictional stress
Answer» D. Load stress + warping stress frictional stress

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A cc slab of thickness 20 cm is constructed over a base of granular material with a modulus of reaction 10 kg/cm3. The maximum temperature differential between the top and bottom of the slab is found to be 19 C during summer day and night. The spacing between transverse joints is 8 m and the spacing between longitudinal joints is 4 m. The design wheel load is 5100 kg, radius of contact area is 15 cm, Poisson s ratio is 0.15, modulus of elasticity is 3 105 kg/cm2, the thermal coefficient is 10 10-6 / C and the coefficient of friction is 1.5. Using the above information, find the worst combination of stresses at the edge of the pavement.
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What is the critical combination of the stresses at the edge of the pavement during winter?

What is the critical combination of the stresses at the edge of the pavement during winter?

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