文档介绍：9th International LS-DYNA Users Conference Simulation Technology (2)
Application of Dynamic Relaxation in Thermo-Elastic
Structural Analysis of Highway Pavement Structures
Samir N. Shoukry, Gergis W. William, Mourad Riad
West Virginia University
Morgantown, WV 26506-6103, USA
Abstract
This paper describes the application of the dynamic relaxation technique implemented in LS-DYNA in analyzing
large transportation structures as dowel jointed concrete pavements under the effect of temperature variations. The
main feature of the pavement model is the detailed modeling of dowel bars and their interfaces with the surrounding
concrete using extremely fine mesh of solid elements, while in the bridge structure, it is the detailed modeling of the
girder-deck interface as well as the bracing members between the girders. The 3DFE results were found to be in a
good agreement with experimentally measured data obtained from instrumented pavements sections constructed in
West Virginia. Thus, such a technique provides a good tool for analyzing the response of large structures to static
loads in a fraction of the time required by traditional implicit finite element methods.
Introduction
Modeling concrete structures is very difficult because of the material and geometrical
nonlinearity involved in such structures. For example, when mod