NOMOGRAPHS FOR THE DESIGN OF STEEL REINFORCEMENT IN CONTINUOUSLY REINFORCED CONCRETE PAVEMENT
This study sought to develop graphic procedures (nomographs) for the design of continuously reinforced concrete pavement (CRCP) by the Texas State Department of Highways and Public Transportation for a range of specified local conditions. This set of nomographs, when used as a supplementary design tool with the CRCP-2 computer program model, will facilitate CRCP design. This will substantially reduce both the time and the cost involved in the design process, while at the same time taking into account the effect of regional and local environments. First, regression equations were developed for the prediction of three design parameters (crack spacing, crack width,and steel stress), and then principles of nomography were applied to these mathematical relations to prepare three corresponding nomographs. The choice of equations was made following multiple linear and nonlinear least-squares fits to a fractional factorial of simulated observations that were output from the CRCP-2 computer program. Theoretical models, developed at the Center for Highway Research in Austin, Texas, and variations of the three design parameters with each of the relevant input variables over the range of the simulated data were considered in deciding on the form of the regression equations. Standard-error-of-residuals and R squared (proportion of variance explained by the regression equation) statistics were considered in the final choice of coefficients for the regression equations. Confidence prediction limits were determined by using multiple linear- regression techniques for application to nomograph predictions. A recommended procedure for the use of the nomographs with appropriate limiting criteria is out-lined and an example given.
- Record URL:
- Summary URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309030706
-
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.
-
Authors:
- Noble, C S
- McCullough, B F
- Ma, JCM
-
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; References; Tables;
- Pagination: pp 15-23
- Monograph Title: Concrete Pavements and Pavement Overlays
-
Serial:
- Transportation Research Record
- Issue Number: 756
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Computer programs; Continuously reinforced concrete pavements; Cracking; Forecasting; Mathematical models; Multiple regression analysis; Nomographs; Pavement design; Regression analysis; Spacing; Steel; Stresses; Ultimate load design; Width
- Old TRIS Terms: Multiple regression
- Subject Areas: Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;
Filing Info
- Accession Number: 00325976
- Record Type: Publication
- ISBN: 0309030706
- Files: TRIS, TRB
- Created Date: May 21 1981 12:00AM