00676544

Component

http://onlinepubs.trb.org...trr/1994/1449/1449-022.pdf

https://scholar.google.co...ides&publication_year=1994

At present it is common to treat an overlaid concrete pavement system as a multilayered Kirchhoff plate. A number of finite-element computer programs use this idealization, which assumes that the original slab and the overlay have the same deflection profile, that is, that the two act as an effective, homogeneous plate. Environmental loads, however, are among the most significant factors, making the assumption of equality of the deflection profiles of slab and overlay unacceptable. A formulation proposed by Totsky is implemented into an existing finite-element program to account for the effects of layer separation and compressibility. The effects of combined traffic loading and temperature differentials on the stresses and deflections in the pavement system when the overlay curls away from the existing slab are examined. The product is a finite-element code, abbreviated ILSL2, which represents an extension of the ILLI-SLAB program. Practical illustrative examples of the use of ILSL2 pertaining to typical pavements are presented. When appropriate these results are compared with existing analytical or numerical solutions, including those obtained by using an earlier version of ILLI-SLAB. It was found that both layer compressibility and separation effects need to be accommodated in a reliable mechanistic model for unbonded concrete overlays. If these effects are neglected, significant errors may result.

This paper appears in Transportation Research Record No. 1449, Design and Rehabilitation of Pavements. 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

01401288

English

p. 174-181

1994

Transportation Research Record

0309060567

Figures (3) ; References (12) ; Tables (3)

Compressibility; Concrete overlays; Deflection; Finite element method; Mathematical models; Mechanical analysis; Mechanistic design; Pavements; Structural analysis; Temperature gradients; Tension; Traffic loads; Wheel loads

Layer separation; Models; Tensile stress; Unbonded concrete overlays

Design; Freight Transportation; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Apr 10 1995 12:00AM

• ANALYTICAL EVALUATION OF BITUMINOUS OVERLAYS ON FLEXIBLE PAVEMENTS
• DEVELOPMENT OF WEIBULL RELIABILITY FACTORS AND ANALYSIS FOR CALIBRATION OF PAVEMENT DESIGN MODELS USING FIELD DATA
• DYNAMIC FINITE-ELEMENT ANALYSIS OF JOINTED CONCRETE PAVEMENTS
• EFFECT OF PAVEMENT VARIABLES ON AVERAGE JOINT DEFLECTIONS IN EXPERIMENTAL CONCRETE PAVEMENT
• ESTIMATION OF STANDARD DEVIATION OF PREDICTED PERFORMANCE OF FLEXIBLE PAVEMENTS USING AASHTO MODEL
• EVALUATION AND REHABILITATION DESIGN OF I-495 IN DELAWARE
• EVALUATION OF HEAVY LOAD DAMAGE EFFECT ON CONCRETE PAVEMENTS USING THREE-DIMENSIONAL, NONLINEAR DYNAMIC ANALYSIS
• EVALUATION OF HIGHWAY UNDERSEALING PRACTICES OF PORTLAND CEMENT CONCRETE PAVEMENTS
• FACTORS AFFECTING CRACK WIDTH OF CONTINUOUSLY REINFORCED CONCRETE PAVEMENT
• FIELD INVESTIGATIONS OF SELECTED STRATEGIES TO REDUCE REFLECTIVE CRACKING IN ASPHALT CONCRETE OVERLAYS CONSTRUCTED OVER EXISTING JOINTED CONCRETE PAVEMENTS
• FRAMEWORK FOR INCORPORATION OF SPALLING IN DESIGN OF CONCRETE PAVEMENTS
• INFLUENCE FUNCTION APPROACH TO ANALYSIS OF JOINTED PORTLAND CEMENT CONCRETE PAVEMENT
• LOADING AND CURLING STRESS MODELS FOR CONCRETE PAVEMENT DESIGN
• MECHANISTIC EVALUATION OF AASHTO FLEXIBLE PAVEMENT DESIGN EQUATIONS
• MECHANISTIC-EMPIRICAL RIGID PAVEMENT DESIGN FOR NEW YORK STATE
• MODELING PERFORMANCE OF HIGHWAY PAVEMENTS
• NEW PREDICTIVE MODELING TECHNIQUES FOR PAVEMENTS
• OPTIMIZING DESIGN STANDARDS FOR NEW PAVEMENTS USING HIGHWAY DESIGN AND MAINTENANCE STANDARDS MODEL (HDM-III)
• PAVEMENT THICKNESS VARIABILITY AND ITS EFFECT ON DETERMINATION OF MODULI AND REMAINING LIFE
• PERFORMANCE OF UNBONDED CONCRETE OVERLAY PROJECT IN CANADA
• PORTLAND CEMENT CONCRETE PAVEMENT REHABILITATION IN WASHINGTON STATE: CASE STUDY
• RATIONAL APPROACH IN APPLYING RELIABILITY THEORY TO PAVEMENT STRUCTURAL DESIGN
• RELIABILITY IN PAVEMENT DESIGN: ISSUES, CONCEPTS, AND SIGNIFICANCE
• RELIABILITY IN PAVEMENT DESIGN? WHO'S KIDDING WHOM?
• SAWCUT DEPTH CONSIDERATIONS FOR JOINTED CONCRETE PAVEMENT BASED ON FRACTURE MECHANICS ANALYSIS
• SOIL-PROPERTY-BASED SUBGRADE RESILIENT MODULUS ESTIMATION FOR FLEXIBLE PAVEMENT DESIGN
• SPECIFIC ENERGY OF DAMAGE AS FRACTURE CRITERION FOR ASPHALTIC PAVEMENTS
• USE OF THREE-DIMENSIONAL, DYNAMIC, NONLINEAR ANALYSIS TO DEVELOP LOAD EQUIVALENCY FACTORS FOR COMPOSITE PAVEMENTS