STP1198: A Methodology to Identify Material Properties in Pavements Modeled as Layered Viscoelastic Halfspaces (Theory)

    Stubbs, N
    Associate Professor, Texas A&M University, College Station, Texas

    Torpunuri, VS
    Research Associate, Texas Transportation Institute, Texas A&M University, College Station, TX

    Lytton, RL
    Professor, Texas A&M University, College Station, TX

    Magnuson, AH
    Engineering Research Associate, Texas Transportation Institute, Texas A&M University, College Station, TX

    Pages: 15    Published: Jan 1994


    Abstract

    An accurate, rapid, and reliable methodology for identifying material properties of pavements modeled as layered viscoelastic halfspaces subjected to dynamic excitation is developed. The methodology is based on the forward model of system identification. The Modulus of elasticity of each layer, the damping in each layer, and the slope of the creep curve for the top layer are selected as the parameters to be identified. The validity and accuracy of the proposed methodology is demonstrated by several numerical experiments involving simulated changes in the selected pavement parameters. Iterative procedures developed to solve nonlinear problems which arise in estimating the pavement parameters are presented.

    Keywords:

    systems identification, viscoelasticity, pavements, multilayered, falling weight deflectometer


    Paper ID: STP18141S

    Committee/Subcommittee: D04.39

    DOI: 10.1520/STP18141S


    CrossRef ASTM International is a member of CrossRef.