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    Numerical Simulation of Rolling Dynamic Deflectometer Tests

    Source: Journal of Transportation Engineering, Part A: Systems:;1999:;Volume ( 125 ):;issue: 002
    Author:
    Seong-Min Kim
    ,
    Jose M. Roesset
    ,
    Kenneth H. Stokoe II
    DOI: 10.1061/(ASCE)0733-947X(1999)125:2(85)
    Publisher: American Society of Civil Engineers
    Abstract: The responses of typical flexible and rigid pavements to the dynamic loads imposed by the rolling dynamic deflectometer (RDD) were investigated. The RDD is a recently developed nondestructive testing vehicle that applies a steady-state harmonic force while continuously moving along the pavement. To find the pavement response to moving harmonic loads, a numerical method using the elastodynamics solution for stationary impulsive loads applied to layered media and the superposition of the effect of sequential loading impulses at different stations (spaced according to the advance velocity of the load) was implemented. The effects of RDD velocity, loading frequency, depth to bedrock, and layer stiffness on the deflection basins were investigated in the longitudinal and transverse directions. The results show that for the vehicle velocities and loading frequencies that will be used in conjunction with the RDD, dynamic effects caused by the motion of the vehicle are negligible, and the deflection basins at any instant of time essentially are the same as those that would be obtained with a stationary static or harmonic load, with the advantage to RDD testing being that the loading magnitude and loading frequency can be changed easily and that profiling is continuous along the pavement.
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      Numerical Simulation of Rolling Dynamic Deflectometer Tests

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/37170
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    • Journal of Transportation Engineering, Part A: Systems

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    contributor authorSeong-Min Kim
    contributor authorJose M. Roesset
    contributor authorKenneth H. Stokoe II
    date accessioned2017-05-08T21:03:46Z
    date available2017-05-08T21:03:46Z
    date copyrightMarch 1999
    date issued1999
    identifier other%28asce%290733-947x%281999%29125%3A2%2885%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/37170
    description abstractThe responses of typical flexible and rigid pavements to the dynamic loads imposed by the rolling dynamic deflectometer (RDD) were investigated. The RDD is a recently developed nondestructive testing vehicle that applies a steady-state harmonic force while continuously moving along the pavement. To find the pavement response to moving harmonic loads, a numerical method using the elastodynamics solution for stationary impulsive loads applied to layered media and the superposition of the effect of sequential loading impulses at different stations (spaced according to the advance velocity of the load) was implemented. The effects of RDD velocity, loading frequency, depth to bedrock, and layer stiffness on the deflection basins were investigated in the longitudinal and transverse directions. The results show that for the vehicle velocities and loading frequencies that will be used in conjunction with the RDD, dynamic effects caused by the motion of the vehicle are negligible, and the deflection basins at any instant of time essentially are the same as those that would be obtained with a stationary static or harmonic load, with the advantage to RDD testing being that the loading magnitude and loading frequency can be changed easily and that profiling is continuous along the pavement.
    publisherAmerican Society of Civil Engineers
    titleNumerical Simulation of Rolling Dynamic Deflectometer Tests
    typeJournal Paper
    journal volume125
    journal issue2
    journal titleJournal of Transportation Engineering, Part A: Systems
    identifier doi10.1061/(ASCE)0733-947X(1999)125:2(85)
    treeJournal of Transportation Engineering, Part A: Systems:;1999:;Volume ( 125 ):;issue: 002
    contenttypeFulltext
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