Backcalculation of Layer Moduli using Time History of Embedded Gauge Readings

Eyal Levenberg, Rebecca S. McDaniel, Terhi Pellinen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

A prototype-scale asphalt pavement was constructed in the Purdue/INDOT
accelerated pavement testing facility. The test section was loaded under constant
temperature conditions with a half-axle dual-wheel assembly. During construction, the pavement was instrumented with stress and strain gauges located along the wheel path and outside the wheel path at different depths. As the loading assembly traversed the test section, the response of the pavement system was monitored by the embedded gauges. In this paper, the time history of the readings is presented and subsequently utilized to backcalculate the resilient mechanical properties of the different layers. For this purpose the pavement system is modeled as a linear-elastic layered medium. Inertial (dynamic) effects are disregarded, and the quasi-static approach is applied for
simulating the moving load. The analysis is performed for the pavement after it had incurred 5,000 load applications and separately after 80,000 load applications. Material properties in both cases are presented and compared. Results are also discussed in light of complex modulus testing and Falling Weight Deflectometer data.
Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Accelerated Pavement Testing
Number of pages31
Publication date2008
Publication statusPublished - 2008
Externally publishedYes
Event3rd International Conference on Accelerated Pavement Testing - Madrid, Spain
Duration: 1 Oct 20083 Oct 2008
Conference number: 3

Conference

Conference3rd International Conference on Accelerated Pavement Testing
Number3
CountrySpain
CityMadrid
Period01/10/200803/10/2008

Keywords

  • Backcalculation
  • Linear elasticity
  • Resilient response
  • Time history

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