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Title: STRAIN RESPONSE AND PERFORMANCE OF SUBGRADES AND FLEXIBLE PAVEMENTS UNDER VARIOUS LOADING CONDITIONS
Accession Number: 00713507
Record Type: Component
Availability: Find a library where document is available Abstract: Specific fundamental loading parameters (load magnitude and number of repetitions, tire inflation pressure, and basic tire type) that influence the behavior of thin-surfaced granular pavements were examined. The pavement response and performance measurements included continuous surface deflection basins, longitudinal and transverse profiles, and vertical strains in the granular layers and subgrade. The first pavement trial considered only the elastic response of a thin-surfaced, unbound granular pavement over a weak subgrade, to varying wheel loads, tire inflation pressures, and two basic tire types (bias and radial ply). The axle load had the greatest effect on pavement response and the tire type had no apparent effect, but increases in the tire pressure resulted in slight decreases in the magnitude of the vertical compressive strain in the subgrade and unbound granular cover. Two subsequent pavements were tested to study the relationship between elastic response at different cumulative loadings and the structural capacity of each pavement. The magnitudes of the resilient strains measured are substantially greater than the levels predicted by the models on which current flexible pavement design procedures are based for the same number of loading repetitions to failure. Subgrade strain models for thin-surfaced unbound granular pavements are evaluated. The pavement construction, loading routine, analysis, and results are discussed.
Supplemental Notes: This paper appears in Transportation Research Record No. 1482, Pavement Design and Analysis. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01399799
Language: English
Authors: Pidwerbesky, Bryan DPagination: p. 87-93
Publication Date: 1995
Serial: Features: Figures
(7)
; References
(5)
; Tables
(4)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Design; Highways; Pavements; Vehicles and Equipment; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces
Files: TRIS, TRB, ATRI
Created Date: Nov 7 1995 12:00AM
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