Three Dimensional Finite Element Programs For Pavement Analysis Appendix 3 PDF Download

A three-dimensional (3-D) finite element model for concrete pavements, called 3DPAVE, was developed in this study in order to analyze accurately the many complex and interacting factors which influence the support provided to a concrete pavement. Pavement support and finite element models for pavements were first briefly reviewed. Based on the review, the ABAQUS general-purpose finite element software was used to develop a powerful and versatile 3-D model to overcome many of the inherent limitations of 2-D finite element models. A careful analysis of ABAQUS' many element types, features and options was conducted to select the components which would produce a robust and efficient model. The 3DPAVE consistently outperformed the 2-D model in accuracy over wide ranges of inputs for a variety of problems during its development. 3DPAVE was validated by comparison with measured deflection, stress, and strain data for traffic loading and temperature variation from AASHO Road Test, the Arlington Road Test, and the Portland Cement Association's slab experiments. In every comparison with measured field data, 3DPAVE's calculated responses were found to be in very good agreement with the measured responses. Applications of 3DPAVE were made to explore many complicated effects and interactions in concrete pavements, including foundation support; base thickness, stiffness, and interface bond/friction; slab curling and warping due to temperature and moisture gradients; dowel and aggregate interlock load transfer action at joints; and improved support with a widened lane, widened base, or tied concrete shoulder.