LABORATORY INVESTIGATION OF FLEXIBLE-PAVEMENT RESPONSE BY USING TRANSFER FUNCTIONS

Transfer-function theory was applied to examine the behavior of flexible highway pavements. A numerical computation was used to derive pavement response functions from impulse testing of three-layer models of flexible pavements. Analytical computations formed the basis for calculating deflections that result from static and repeated loads. It was hypothesized that more-significant parameters than are commonly used could be obtained under controlled laboratory conditions. By using nonlinear regression, the response functions were approximated by a mathematical model to include these parameters. The derived model was used as the input for the analytical computations. The adequacy of the developed model was verified by comparing predicted and measured deflections. A silty-sand subgrade, a crushed- aggregate base, and an asphalt-concrete surface were the components of the three-layer systems. Model pavements of two different surface-course thicknesses were tested statically and dynamically at three different stress levels. To permit the tests to be performed inside a constant- temperature room, the maximum possible size adopted for the model pavements was 0.8 x 9.8 x 9.6 m (32.5 x 32.5 x 23.25 in). Test temperatures were 10, 24, and 38 (c) (50, 75, and 100 deg (F). Deflections were measured at five locations. It was shown that time-dependent behavior of flexible pavements can be represented by response functions. The parameters in these functions are regarded as descriptors of pavement characteristics and have the capability of predicting pavement response. (Author)

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1980/755/755-006.pdf
• Summary URL:
  https://scholar.google.com/scholar_lookup?title=LABORATORY+INVESTIGATION+OF+FLEXIBLE-PAVEMENT+RESPONSE+BY+USING+TRANSFER+FUNCTIONS&author=G.+Ali&author=W.+Goetz&author=M.+Harr&publication_year=1980
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • This paper appeared in Transportation Research Record No. 755: Evaluation and Analysis of Flexible Pavement Components and Properties. 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.
• Authors:
  • Ali, Galal A
  • Goetz, W H
  • Harr, M E
• Conference:
  • 59th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1980-1-21 to 1980-1-25
• Publication Date: 1980

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 36-42
• Monograph Title: Evaluation and Analysis of Flexible Pavement Components and Properties
• Serial:
  • Transportation Research Record
  • Issue Number: 755
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accelerated tests; Asphalt concrete; Crushed aggregates; Deflection; Flexible pavements; Laboratory tests; Mathematical models; Nonlinear equations; Pavements; Regression analysis; Repeated loads; Silty sands; Static loads; Subgrade (Pavements); Transfer functions
• Old TRIS Terms: Pavement deflection; Response; Static loading
• Subject Areas: Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00322995
• Record Type: Publication
• ISBN: 0309030684
• Files: TRIS, TRB
• Created Date: Apr 15 1981 12:00AM