00607727

Component

http://onlinepubs.trb.org...trr/1990/1286/1286-008.pdf

https://scholar.google.co...ough&publication_year=1990

A modification of the reinforcement formula that considers the realistic frictional characteristics of subbase types is presented. The objective of this study is not to abandon the current formula but to arrive at a better formula, one that considers the field observations. Rational reinforcement design is important because the amount of reinforcement affects the restraint on the movement of a pavement section, or slab, and the long-term performance. This study was the result of a need to revise the reinforcement formula based on the subbase drag theory. The reinforcement formula was modified in accordance with the experimental results obtained concerning subbase frictional resistance. The modification was necessary to include the actual characteristics of subbase friction in the reinforcement design formula for both continuously and jointed reinforced concrete pavements. The new formula reflects the experimental results concerning subbase friction. It represents the actual components of frictional resistance at the interface: adhesion, bearing, and shear. The implementation of information from this study will result in more rational reinforcement design. The formula calculates the steel requirement for the middle of the slab; in other words, the calculated value is the maximum requirement, and the locations between the free end and the middle of the slab will require less reinforcement. Further experimental study is necessary to calibrate the new formula.

This paper appears in Transportation Research Record No. 1286, Design and Evaluation of Rigid and Flexible Pavements 1990. 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

01411074

p. 78-83

1990

Transportation Research Record

0309050707

Figures (5) ; References (3) ; Tables (2)

Design; Drag; Field studies; Formulas; Material reinforcement; Skin resistance; Subbase (Pavements)

Subbase

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

TRIS, TRB, ATRI

Apr 30 1991 12:00AM

• AASHTO FLEXIBLE PAVEMENT DESIGN METHOD: FACT OR FICTION?
• AGGREGATE INTERLOCK: A PURE-SHEAR LOAD TRANSFER MECHANISM
• ASSESSMENT OF DAMAGE CAUSED TO PAVEMENTS BY HEAVY TRUCKS IN NEW ENGLAND
• COMPUTER SIMULATION OF LOAD EQUIVALENCE FACTORS
• CONTROL OF FAULTING THROUGH JOINT LOAD TRANSFER DESIGN
• EFFECT OF FRACTURE HEALING ON LABORATORY-TO-FIELD SHIFT FACTOR
• EFFECT OF LANE WIDENING ON LATERAL DISTRIBUTION OF TRUCK WHEELS
• EVALUATION OF VARIABLES AFFECTING FLEXIBLE PAVEMENT THAWING FOR TIMING SPRING LOAD RESTRICTIONS
• EXTENSION OF LOAD EQUIVALENCY FACTORS FOR VARIOUS PAVEMENT CONDITIONS
• FATIGUE DAMAGE PROPERTIES OF ASPHALTIC CONCRETE PAVEMENTS
• FIELD INVESTIGATION OF PUNCHOUT DISTRESS IN CONTINUOUSLY REINFORCED CONCRETE PAVEMENT IN ILLINOIS
• FIELD PERFORMANCE AND EVALUATION OF THIN BONDED OVERLAYS
• HEAVILY LOADED TRAILERS: AN APPROACH TO EVALUATE THEIR INTERACTION WITH ASPHALT CONCRETE PAVEMENTS
• INFLUENCE OF AXLE GROUP SPACING ON PAVEMENT DAMAGE
• INTEGRATED COMPUTER MODEL TO ESTIMATE MOISTURE AND TEMPERATURE EFFECTS BENEATH PAVEMENTS
• MECHANISTIC DESIGN CONSIDERATIONS FOR PUNCHOUT DISTRESS IN CONTINUOUSLY REINFORCED CONCRETE PAVEMENT
• MICH-PAVE: A NONLINEAR FINITE ELEMENT PROGRAM FOR ANALYSIS OF FLEXIBLE PAVEMENTS
• OVERLAY DESIGN METHOD FOR FLEXIBLE PAVEMENTS IN ARIZONA
• PREDICTION OF DAMAGE TO FLEXIBLE PAVEMENTS IN SEASONAL FROST AREAS
• PRESTRESSED CONCRETE PAVEMENT: INSTRUMENTATION, BEHAVIOR, AND ANALYSIS OF HORIZONTAL MOVEMENTS
• PROBABILISTIC MODELING OF FLEXIBLE PAVEMENTS
• THAW WEAKENING OF PAVEMENT STRUCTURES IN SEASONAL FROST AREAS
• VALIDATION OF CONCRETE PAVEMENT RESPONSES USING INSTRUMENTED PAVEMENTS