Simulation of shakedown behavior for flexible pavement's unbound granular layer

Ainalem Nega, Hamid Nikraz, Imad L. Al-Qadi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Full-depth asphalt concrete pavements are generally designed to control fatigue cracking and reduce potential rutting when subjected to repeated heavy traffic loads. A particular interesting question is whether a limit load exists below which excitation shakedown in the sense that the granular layer does not accumulate further deformation. Although pavement design guides give more weight to asphalt concrete layer failures, granular failure may not be ignored; especially for thin layers and/or heavy load. The behavior of granular layers used in base and, sub-base layers of flexible pavement is complicated due to its nonlinear elastoplastic response when subjected to dynamic traffic loading. The objective of this paper is to present a new simplified simulation model for the Shakedown behavior of granular layer in flexible pavement. This method is integrated with Mohr-Coulomb criterion, which is used and applied to simulate the response of unbound granular layers to dynamic loading in a numerical analysis. The results of analysis are then compared to simplify the results of modeling without considering shakedown effects and then, the conclusions are drawn.

Original languageEnglish (US)
Title of host publicationAirfield and Highway Pavements 2015
Subtitle of host publicationInnovative and Cost-Effective Pavements for a Sustainable Future - Proceedings of the 2015 International Airfield and Highway Pavements Conference
EditorsJohn T. Harvey, Katie F. Chou
PublisherAmerican Society of Civil Engineers
Pages801-812
Number of pages12
ISBN (Electronic)9780784479216
DOIs
StatePublished - Jan 1 2015
Event2015 International Airfield and Highway Pavements Conference: Innovative and Cost-Effective Pavements for a Sustainable Future - Miami, United States
Duration: Jun 7 2015Jun 10 2015

Publication series

NameAirfield and Highway Pavements 2015: Innovative and Cost-Effective Pavements for a Sustainable Future - Proceedings of the 2015 International Airfield and Highway Pavements Conference

Other

Other2015 International Airfield and Highway Pavements Conference: Innovative and Cost-Effective Pavements for a Sustainable Future
CountryUnited States
CityMiami
Period6/7/156/10/15

Keywords

  • Dynamic analysis
  • Flexible pavement
  • Mohr Coulomb criterion
  • Numerical simulation
  • Shakedown
  • Unbound granular Layer (UGL)

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials

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