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Title: COMPARISON OF SOLUTIONS FOR STRESSES IN PLAIN JOINTED PORTLAND CEMENT CONCRETE PAVEMENTS
Accession Number: 00372926
Record Type: Component
Availability: Find a library where document is available Abstract: A number of existing models to compute the stresses in plain jointed portland cement concrete (PCC) pavements due to traffic loads are examined, and those that show the most promise are recommended. Solutions examined include (a) plate on dense-liquid subgrades, closed form and finite elements; (b) plate on elastic solid, closed form and finite element; and (c) layered elastic system, closed form and finite element (two-dimensional and three-dimensional representations). Although the three-dimensional finite-element analysis for the layered elastic solid is probably the most representative of the methods examined, the associated computer costs preclude its use on a routine basis at this time. The study does show that a two-dimensional finite-element analysis for the same representation is suitable for determining load-associated stresses in plain jointed PCC pavements. Changes in the engineering properties of materials, climate variations, and loading conditions can be accommodated. The maximum tensile stress--the controlling factor in the fatigue life of PCC pavements--occurs near the edge of the PCC at the midslab position. A finite-element analysis, which allows for the consideration of the strengths of the cement-stabilized layer (not accounted for in a dense-liquid subgrade type of analysis), has demonstrated that the stiffness of the cement-stabilized layer has an important effect on the fatigue life of PCC pavements. This analysis has indicated that different cracking-behavior patterns can be identified with different stabilized layer stiffnesses. A detailed traffic analysis, with allowance for thermal stresses and material variabilities, has indicated that there is a common fatigue relation for PCC pavements when the failure criteria N sub f = 225,000 (MR/delta) to the 4th power is used. (Author)
Supplemental Notes: Publication of this paper sponsored by Committee on Rigid Pavement Design. 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 #: 01416492
Authors: MacLeod, D RMonismith, C LEditors: Herman, Scott CPagination: pp 22-31
Publication Date: 1982
Serial: ISBN: 0309035007
Media Type: Print
Features: Figures
(16)
; References
(38)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Design; Freight Transportation; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways
Files: TRIS, TRB
Created Date: May 31 1983 12:00AM
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