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KSCE Journal of Civil Engineering

, Volume 20, Issue 2, pp 702–708 | Cite as

Issues in simulating falling weight deflectometer test on concrete pavements

  • Chen-Ming Kuo
  • Chih-Chiang LinEmail author
  • Cheng-Hao Huang
  • Yi-Cheng Lai
Highway Engineering

Abstract

Falling Weight Deflectometer (FWD) produces pavement responses using a falling mass drop. This study investigated the features involved in the finite element modeling of FWD tests to help in the calibration of backcalculation. Falling mass, model size, subgrade damping, and boundary conditions were studied to reveal the significances of these factors on pavement responses. By modeling the falling mass in finite element models, this study has justified the idea that field-measured time history of impact force can be used as an alternative to falling mass. It is also concluded that subgrade damping, self-weight of slab, and boundary conditions are significant in modeling and interpretation of FWD finite element analysis. Finite element model with at least six times radius of relative stiffness is required to simulate dynamic responses of a continuously reinforced concrete slab.

Keywords

FWD finite element analysis dynamic analysis subgrade damping backcalculation 

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Copyright information

© Korean Society of Civil Engineers and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Chen-Ming Kuo
    • 1
  • Chih-Chiang Lin
    • 1
    Email author
  • Cheng-Hao Huang
    • 1
  • Yi-Cheng Lai
    • 1
  1. 1.Dept. of Civil EngineeringNational Cheng Kung UniversityTainan CityTaiwan

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