Finite element analysis and load tests of full-scale, variable-thickness precast, prestressed concrete pavement on granular base

Three full-scale precast, prestressed concrete pavements with variable thicknesses were constructed on a granular base and tested under static and repeated loads. The test pavements were modeled using the finite element method, with the supporting foundation modeled as a series of linear springs and k values calculated using the experimental data. The pavement testing was performed using a movable testing frame designed for the research project. To monitor the response of the pavement, linear variable differential transformers and a load cell were installed and displacements were recorded to a data acquisition system during the entire testing period. The testing frame and data acquisition system that were used were found to be practical and effective tools for the testing performed for this project. In repeated load testing and in static load testing, the pavement showed a linear relationship between load and deflection and the deformation of the panels was calculated accurately using the finite element method. Furthermore, as expected, some cracking did occur in the pavement panels when loads of 30 kip (130 kN) were applied at the edges of the panels.