01090312

Component

https://doi.org/10.3141/2068-06

http://scholar.google.com...luer&publication_year=2008

Various highway vehicle axle–wheel arrangements and aircraft gear–wheel configurations adopted currently to accommodate increasing load levels affect, according to different multiple wheel-loading scenarios, flexible pavement response and performance. The traditional approach of single wheel–load response superposition, especially in the case of nonlinear analysis, may not be adequate to analyze pavements subjected to such multiple wheel-load cases. These complex loading conditions require advanced pavement layered solutions for realistic consideration of nonlinear behavior of pavement foundation geomaterials (e.g., fine-grained subgrade soils and unbound aggregates used in untreated base–subbase layers), and at the same time use three-dimensional (3-D) finite element (FE) analyses to apply multiple wheel loading. In this study, stress-dependent resilient modulus models successfully incorporated into the 3-D FE-based mechanistic pavement analysis through a programmed user material subroutine in ABAQUS were used to predict pavement resilient responses at observed critical-load locations. The results indicated that proper characterizations of the nonlinear, stress-dependent pavement foundation geomaterials significantly affected predictions of critical pavement responses. Most important, pavement responses under multiple wheel loads were somewhat different from those obtained from the single wheel–load response superposition approach, which suggested the need for 3-D nonlinear FE analyses for improved response predictions.

01117265

English

pp 49-60

2008

Transportation Research Record: Journal of the Transportation Research Board

9780309113403

Print

Figures (6) ; References (18) ; Tables (5)

Fine grained soils; Finite element method; Flexible pavements; Modulus of resilience; Pavement performance; Subbase (Pavements); Subgrade (Pavements); Wheel loads

ABAQUS (Computer program)

Nonlinear analysis; Unbound aggregate base courses

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Jan 29 2008 4:15PM

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