BACKCALCULATION OF MATERIAL PROPERTIES BASED ON NON-LINEAR MATERIAL BEHAVIOR
This paper deals with the development of a computer program for backcalculating non-linear pavement material parameters using the finite element method. The fortran computer program, 2DB, runs on a 32-bit personnel computer. Applications are illustrated by reference to the Axisymetric problem of a falling weight deflectometer (FWD) on flexible and rigid pavements. A non-linear, hyperbolic, stress-strain relationship is used for the base, subbase, and subgrade soils. Results show that a wide range in moduli, varying both vertically and horizontally, can occur within the base and subgrade layers of a pavement system due to stresses induced by the FWD loading. Pavements can be represented more realistically using finite elements than with linear, elastic methods most of which are limited to three or four layers with no horizontal variation in moduli.
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Corporate Authors:
Minnesota Department of Transportation
395 John Ireland Boulevard
St Paul, MN United States 55155 -
Authors:
- Alexander, D R
- Barker, W R
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Conference:
- 4th International Conference, Bearing Capacity of Roads and Airfields
- Location: Minneapolis, MN
- Date: 1994-8-17 to 1994-8-21
- Publication Date: 1994
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 47-59
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Serial:
- Volume: 1
Subject/Index Terms
- TRT Terms: Backcalculation; Base course (Pavements); Behavior; Computer programs; Falling weight deflectometers; Finite element method; Flexible pavements; Materials; Nonlinear systems; Pavements; Properties of materials; Stresses; Subbase (Pavements); Subgrade (Pavements)
- Uncontrolled Terms: Base; Horizontal; Subbase; Vertical
- Old TRIS Terms: Axisymmetric
- Subject Areas: Data and Information Technology; Highways; Materials; Pavements; Planning and Forecasting; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials; I72: Traffic and Transport Planning;
Filing Info
- Accession Number: 00728632
- Record Type: Publication
- Files: TRIS, STATEDOT
- Created Date: Nov 27 1996 12:00AM