In order to understand and model pavement behavior and responses (e.g., stress, strain,
available as a freeware, was used to model the mechanistic responses of the composite structures.
MICH-PAVE is a non-linear finite element software for the analysis of flexible and rigid
mesh can be visualized using the software, and the nodes that compose the mesh are used to
compute pavement responses at specific locations at both vertical and radial distances from the
software prior to using them in this study; the obtained results were very similar.
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Mechanistic analyses were performed on various composite structures to understand their
behavior as various rigid bases were used. The material properties (i.e., elastic modulus,
Poisson’s ratio) used are given in Table 7. Because of the extensive experience with this type of
pavements in the U.K., the composite structure analyzed was based on the U.K. design and
included the following input parameters:
• Surface course: HMA layer: 175 mm (7 in) thickness
• Base course: (granular,
soil cement, CTB, lean mix, RCC, or PCC): 200 mm (8 in)
• Subbase: granular subbase: 150 mm (6 in) thickness
• Subgrade: compacted subgrade; at least 300 mm (12 in)
• Load: one 40-KN (9,000-lb) load with a tire pressure of 0.83 MPa (120 psi) (for
deflections, two 20-KN [4,500-lb] loads with the same tire pressure were used).
Distress Transfer Functions
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