THE EFFECT OF DEGREE OF CONTINUITY ACROSS A VOID OR CRACK ON PERFORMANCE OF CONCRETE PAVEMENTS
WHEN A REINFORCED CONCRETE PAVEMENT CRACKS, THERE IS SOME REDUCTION IN RIGIDITY. THE REDUCTION MAY RESULT FROM IMPERFECT TRANSFER OF MOMENT ACROSS THE CRACK OR FROM IMPERFECT TRANSFER OF BOTH MOMENT AND SHEAR, DEPENDING ON WIDTH OF THE CRACK AND HOW WELL THE PAVEMENT IS REINFORCED. ANALYSES ARE MADE FOR DEFLECTIONS AND MOMENTS IN PAVEMENT LOADED NEAR A LONG, STRAIGHT CRACK FOR VARIOUS COMBINATIONS OF MOMENT AND SHEAR TRANSFER ACROSS THE CRACK. FOURIER INTEGRALS ARE USED TO SOLVE THE PROBLEM. SOLUTION IS FIRST MADE FOR A CONCENTRATED LOAD AT A GIVEN POINT, AND THEN MAXWELL'S RECIPROCAL THEOREM IS USED TO OBTAIN DEFLECTIONS AT THAT POINT DUE TO DISTRIBUTED LOADS AT ANY POINT. A PROGRAM HAS BEEN WRITTEN FOR COMPUTING DEFLECTIONS AND MOMENTS FOR ANY ASSUMED EFFICIENCY OF TRANSFER. REPRESENTATIVE RESULTS ARE GIVEN IN THE FORM OF TABLES. ANALYSES ARE BASED ON THE ASSUMPTIONS THAT (A) EXCEPT FOR THE CRACK, THE PAVEMENT BENDS IN ACCORDANCE WITH THE LAGRANGIAN EQUATION FOR THIN PLATES, AND (B) THE SUBGRADE REACTION IS DIRECTLY PROPORTIONAL TO THE LOCAL DEFLECTION. PRESENT STUDY SHOWS THAT INCREASING EFFICIENCY OF MOMENT AND SHEAR TRANSFER ACROSS A CRACK REDUCES THE MAXIMUM DEFLECTIONS AND MOMENTS IN THE PAVEMENT DUE TO LOADS ON THE PAVEMENT. /AUTHOR/
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Supplemental Notes:
- Paper sponsored by Committee on Theory of Pavement Design and presented at the 48th Annual Meeting. 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
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Authors:
- Niu, H P
- Pickett, Gerald
- Publication Date: 1969
Media Info
- Media Type: Print
- Features: Tables;
- Pagination: pp 186-193
- Monograph Title: Design, evaluation, and performance of pavement systems
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Serial:
- Highway Research Record
- Issue Number: 291
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Coefficient of subgrade reaction; Deflection; Mathematical analysis; Pavement cracking; Pavements; Reinforced concrete pavements; Shear stress
- Uncontrolled Terms: Shear transfer
- Old TRIS Terms: Pavement deflection
- Subject Areas: Highways; Pavements;
Filing Info
- Accession Number: 00207060
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Mar 9 1970 12:00AM