A three-dimensional finite element model of a rigid airport pavement that employs public domain software was developed and tested. The model computes linear elastic stresses and displacements in concrete airport pavements that are loaded by multiple-wheel aircraft gears. Numerous rigid pavement features were incorporated in the model, including finite-size slabs, linear elastic joints, multiple pavement layers, and contact surface modeling of the slab/base layer interface. Complex aircraft gears are handled by representing the individual wheels as separate loads. A computer program was written to automatically generate the three-dimensional finite element mesh. Finite element solutions were computed on a UNIX workstation using the NIKE3D public domain computer program. Finite element stress solutions were compared to field data and to critical stresses obtained using the current Federal Aviation Adminitration (FAA) methods as specified in Advisory Circular 150 rigid pavement (Westergaard-based) and layered Elastic Design/Federal Aviation Administration (LEDFAA)(layered elastic-based) pavement design methods.
Development of Advanced Computational Models for Airport Pavement Design
1998
94 pages
Report
Keine Angabe
Englisch
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