The numerical model for parametric studies of forest haul roads pavements [Numerický model pro parametrické studie vozovek lesních odvozních cest]

Forest roads pavement structures are considered to be low volume roads. These roads serve as a mean of transport of wood and people. Besides they are currently often used for recreational purpose. The construction of the pavements should be suitable for forest transportation irrespective of their low bearing capacity. These pavement structures are very specific for special unbound materials that are used in their construction. To meet the requirements of the pavement designs and simulation analysis the FEM model in the software ANSYS was created. This paper compares two material models used for the description of the behaviour of unbound materials. The first is linear elastic according to Hook theory (H model) and the second one is nonlinear plastic model Drucker-Prager (D-P model). ANSYS software has been used to create flexible model based on the parameters of variable principle. The flexible model is parametric to realize repeated calculations useful for optimization analysis.