Simulation of pavement deterioration

The project has two major components:
1) models for calculating stresses and strains in pavement structures (response models), and
2) models relating these stresses and strains to pavement deterioration.
In 1999 a paper entitled "Will Nonlinear Backcalculation Help?" was a keynote presentation at the ASTM symposium on "Nondestructive Testing of Pavements and Backcalculation of Moduli" in Seattle, June 30 to July 1.
At the "International Conference on Accelerated Pavement Testing" in Reno, Nevada a paper entitled "Layer moduli during HVS testing: comparing laboratory results with backcalculations from FWD and MDD deflections" was presented. The paper was co-authored by J.T. Harvey and M. Riemer from University of California at Berkeley and by J.A. Prozzi from CSIR in South Africa.
At the 78th Annual Meeting of the Transportation Research Board, Washington D.C., January 10-14, a paper entitled "Deterioration Models for Managing Flexible Pavements" was presented.
The group working on a new Danish standard for structural design of pavements, under the auspicies of the Road Directorate, continued in 1999. The new standard will be partly based on the simulation program MMOPP (Mathematical Model Of Pavement Performance) developed at IFP. A beta-version was sent out for testing, and a seminar was held with the beta-testers on September 29 at the Danish Road Institute.