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Deformation Modelling of Instrumented Flexible Pavement Structure
University of Iceland.
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
2016 (English)In: Procedia Engineering, 2016, 937-944 p.Conference paper, Published paper (Refereed)
Abstract [en]

A flexible test road structure was built and tested in an Accelerated Pavement Test (APT) using a Heavy Vehicle Simulator (HVS) to monitor its performance behaviour. In the tests more than one million load cycles were applied, but mid-way the water table was raised, allowing the structure to be analysed in "moist" and "wet" state. The raised water level had a significant effect, decreasing the resilient modulus and increasing the rate of accumulation of permanent deformation (PD). The structure was instrumented to measure stress, strain and deflection responses as a function of load repetitions as well as PD manifested on the surface as rutting. The structure has been modelled in an axisymmetric analysis using a 2D multi layer elastic theory (MLET) as well as a 3D finite element method (FEM).

The methods generally both agreed well with the measurements. The observed accumulation of PD of the unbound layers was modelled using three different material models, both stress and strain based with responses gained from both MLET and FEM. The modelled deformation, is compared to the measured deformation in both "moist" and "wet" state, with some difference observed between models and methods but generally reasonably agreement was established.

Place, publisher, year, edition, pages
2016. 937-944 p.
Keyword [en]
Flexible pavement, Full scale, Test, Deformation, Moisture content, Modulus of elasticity, Repetitive loading, Mathematical model
National Category
Applied Mechanics
Research subject
30 Road: Highway design, 32 Road: Pavement design
Identifiers
URN: urn:nbn:se:vti:diva-10880DOI: 10.1016/j.proeng.2016.06.076Scopus ID: 2-s2.0-84982987953OAI: oai:DiVA.org:vti-10880DiVA: diva2:956853
Conference
3rd International Conference on Transportation Geotechnics, ICTG 2016, 4 September 2016 through 7 September 2016
Available from: 2016-08-31 Created: 2016-08-31 Last updated: 2016-09-20Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf