Analytical Study on Evaluation of Subgrade Modulus Using Portable FWD

Resumé

In a portable FWD test, the variations on the loading time and its integration influences the estimated elastic modulus and K-value of subgrade even if the peak load is the same. The aforementioned could not be found from the impact numerical FEM analysis of elastic model for the portable FWD. In this research, analytical study has been carried out to investigate the influence of various parameters, such as the mass and the drop height of the
falling weight, on the loading time and its integration from the numerical analysis of viscoelastic model.