Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of Poisson's Ratio for Use in the Mechanistic Empirical Pavement Design Guide (MEPDG)
The pavement design industry is moving towards the use of mechanistic principles in designing flexible pavements. To determine the resultant strains in the pavement system using these principles, two material properties are required; 1) modulus and 2) Poissons ratio. In flexible pavement design, the required modulus can be determined either in the laboratory or in the field. In the lab, the dynamic modulus and resilient modulus tests are used to determine the modulus values of asphalt and unbound materials, respectively. In the field, the Falling Weight Deflectometer (FWD) is commonly used to determine the modulus of the various materials. However, the value of the Poissons Ratio is usually assumed. This research project encompassed the evaluation of whether or not the Poissons Ratio can be measured using the same test procedures commonly used to obtain the modulus values for flexible pavement design (i.e. dynamic modulus test for asphalt and resilient modulus test for unbound materials). The research project also evaluated the sensitivity of pavement performance and the FWD backcalculation procedure when varying the magnitude of the Poissons Ratio parameter.
Evaluation of Poisson's Ratio for Use in the Mechanistic Empirical Pavement Design Guide (MEPDG)
The pavement design industry is moving towards the use of mechanistic principles in designing flexible pavements. To determine the resultant strains in the pavement system using these principles, two material properties are required; 1) modulus and 2) Poissons ratio. In flexible pavement design, the required modulus can be determined either in the laboratory or in the field. In the lab, the dynamic modulus and resilient modulus tests are used to determine the modulus values of asphalt and unbound materials, respectively. In the field, the Falling Weight Deflectometer (FWD) is commonly used to determine the modulus of the various materials. However, the value of the Poissons Ratio is usually assumed. This research project encompassed the evaluation of whether or not the Poissons Ratio can be measured using the same test procedures commonly used to obtain the modulus values for flexible pavement design (i.e. dynamic modulus test for asphalt and resilient modulus test for unbound materials). The research project also evaluated the sensitivity of pavement performance and the FWD backcalculation procedure when varying the magnitude of the Poissons Ratio parameter.
Evaluation of Poisson's Ratio for Use in the Mechanistic Empirical Pavement Design Guide (MEPDG)
A. Maher (Autor:in) / T. Bennert (Autor:in)
2008
60 pages
Report
Keine Angabe
Englisch
Construction Equipment, Materials, & Supplies , Algebra, Analysis, Geometry, & Mathematical Logic , Asphalt materials , Flexible pavements , Dynamic modulus , Resilient modulus , Unbound materials , Selection , Pavement sensitivity , Laboratory evaluations , Asphalts , Mechanistic Empirical Pavement Design Guide (MEPDG) , Poisson's Ratio