01550355

Component

Most pavement analysis programs such as the multilayer analysis programs are primarily based on the static and/or elastic models, in which either the dynamic and/or viscoelastic properties are not accounted for. The response modeling in the Mechanistic Empirical Pavement Design Guide (MEPDG) is actually based on a static elastic approach to emulate the dynamic viscoelastic response. This research developed a dynamic viscoelastic finite element (FE) model and pavement analysis program for simulating responses of flexible pavements. Falling weight deflectometer (FWD) test is utilized for validation as it captures the time history information at variable distances. Case studies indicate that a dynamic-viscoelastic model that considers damping could more accurately emulate pavement responses than the static elastic, static viscoelastic, dynamic elastic, and dynamic viscoelastic without damping models. In the future study, the effects of different mechanistic models on performance prediction and pavement design using the MEPDG program will be evaluated.

This paper was sponsored by TRB committee AFK50 Characteristics of Asphalt Paving Mixtures to Meet Structural Requirements. Alternate title: Development of a Dynamic Viscoelastic Pavement Analysis Program.

01550057

15-3066

English

15p

2015

Transportation Research Board 94th Annual Meeting

Digital/other

Figures; References; Tables

Dynamic models; Falling weight deflectometers; Finite element method; Flexible pavements; Pavement design; Validation; Viscoelasticity

Mechanistic-Empirical Pavement Design Guide

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Transportation Research Board Annual Meeting 2015 Paper #15-3066

TRIS, TRB, ATRI

Dec 30 2014 1:02PM