Hide/Show Apps

Soft computing methodology to determine pavement thickness from falling weight deflectometer testing

2010-12-01
Pekcan, Onur
Tutumluer, E.
Ghaboussi, J.
This paper describes an advanced pavement analysis application based on a soft computing methodology, SOFTSYS, recently developed at the University of Illinois for identifying pavement geometry and layer properties through various nondestructive testing methods. Specifically, it is capable of backcalculating pavement layer properties as well as determining thickness of full depth asphalt pavements using results of the Falling Weight Deflectometer (FWD) test. SOFTSYS uses a combination of Genetic Algorithms and Artificial Neural Networks together with a structural pavement analysis model based on the Finite Element Method to obtain accurate and reliable backcalculation solutions. In this paper, basics of SOFTSYS, its numerical schemes and computer code implementation are described first within the scope of soft computing methods. An illustrative example of pavement backcalculation is then presented using the synthetic FWD field data obtained from nonlinear ILLI-PAVE finite element program representing typical full-depth asphalt pavements. Authors O. Pekcan Graduate Research Assistant, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801,. E-mail: opekcan2@illinois.edu E. Tutumluer, M.ASCE Professor, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801. E-mail: tutumlue@illinois.edu J. Ghaboussi, M.ASCE Emeritus Professor, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801. E-mail: jghabous@illinois.edu https://doi.org/10.1061/41095(365)266 Published online: April 26, 2012 ASCE Subject Headings:Asphalt pavements, Falling weight, Computing in civil engineering, Structural reliability, Pavement deflection, Finite element method, Thickness, Soft computing Conference Information GeoFlorida 2010 February 20-24, 2010 | Orlando, Florida, United States © 2010 American Society of Civil Engineers