Apps for modal analysis to characterize the complex modulus of asphalt concrete

A. Gudmarsson, N. Ryden

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

1 Citation (SciVal)

Abstract

The time and temperature dependent dynamic modulus of asphalt concrete is a key parameter to modern pavement design and to pavement quality. However, accurate measurements of the complex modulus through conventional cyclic testing are expensive regarding both time and costs. Novel test methods based on modal analysis facilitate economic, accurate and faster determination of linear viscoelastic material properties of asphalt concrete. The modal analysis is performed by using an impact hammer and an accelerometer to measure frequency response functions of asphalt concrete specimens with free boundary conditions. The complex modulus and complex Poisson’s ratio are determined by matching finite element computed frequency response functions to the measurements. This paper presents one software application to perform the modal testing and one application to compute and optimize frequency response functions to determine the complex modulus and complex Poisson’s ratio. The software applications greatly simplifies the methodology to determine material properties through modal analysis of asphalt concrete specimens.

Original languageEnglish
Title of host publicationBearing Capacity of Roads, Railways and Airfields - Proceedings of the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2017
EditorsImad L. Al-Qadi, A. Tom Scarpas, Andreas Loizos
PublisherCRC Press/Balkema
Pages209-215
Number of pages7
ISBN (Print)9781138295957
DOIs
Publication statusPublished - 2018
Event10th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2017 - Athens, Greece
Duration: 2017 Jun 282017 Jun 30

Conference

Conference10th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2017
Country/TerritoryGreece
CityAthens
Period2017/06/282017/06/30

Subject classification (UKÄ)

  • Geotechnical Engineering
  • Other Materials Engineering

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