University of Florida researchers developed three-dimensional finite element (3D-FE) models to more accurately predict the behavior of concrete slabs. They also followed up on a project to characterize strain gauge performance for a Florida Department of Transportation (FDOT) concrete pavement test road. Dr. Mang Tia, UF civil and coastal engineering, was the principal investigator on this project.
Concrete slabs used on roadways are often evaluated or designed through closed-form analytical solutions based on the work of Harold Westergaard (1888-1950). Many finite-element-based programs are also available that model the concrete as two-dimensional rectangular plates supported by a bed of springs. These approaches may not accurately account for design and construction details and are limited in their ability to predict pavement structural responses. Recent advances in 3D-FE models address many of these limitations. 3D-FE models can simulate more realistic pavement behaviors, such as non-uniform load distributions, multi-wheel loads, pavement cracks, and nonlinear dynamic analysis.
For more information about active and completed FDOT research projects, please visit the Research Center at http://www.fdot.gov/research.