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Accuracy of stress-strain during a pavement analysis can be significantly compromised due to ignorance of non-homogenous distribution of Asphalt Concrete (AC) modulus which results from its temperaturedependency and temperature variation over the depth. To address this issue, a study is performed to investigate whether accuracy of the pavement responses, i.e., stress-strain, can be enhanced by incorporating temperature variation over the depth of an AC layer. A dynamic Finite Element Model (FEM) of an instrumented pavement section on MP 141, Interstate-40 (I-40) is developed to determine the pavement responses. Two different material models are developed: temperature-dependent and crossanisotropic viscoelastic model for AC layer and nonlinear elastic and stress-dependent model for unbound layers. The FEM simulated pavement deflections are compared to field deflections under a Falling Weight Deflectometer (FWD) test load after incorporating the material models. Once the FEM is validated, pavement deflections, stress, and strains are determined incorporating both differential and average temperature constant over the depth of an AC layer. It is observed that pavement responses are not highly affected due to non-homogenous distribution of AC modulus which results from the temperature variation in AC layer. Therefore, incorporation of depth-temperature profile will not enhance the accuracy of pavement stress-strain, and thereby, pavement distress analysis.

Incorporating Depth-Temperature Profile in Presence of AC CrossAnisotropy to Enhance Accuracy of Pavement Stress-Strain