History of the Bedding Factor and Recommendations for the Design of Reinforced Concrete Pipe

Currently, two methods are available for the design of reinforced concrete pipes: the indirect design method and the direct design method. Since its development in the early part of the last century, the empirical indirect design method has been updated several times to reflect advancements in construction practice and engineering technology. The direct design method is a modern, flexible approach to pipe design that incorporates state-of-the-art soil-structure analysis methods. There are various current publications that support the use of both methods for pipe design. However, changes to indirect design procedures and proper application of the direct design method may not be well understood by designers. The goal of this work is to present designers with a concise history of both design methods to facilitate the proper application of either design method for reinforced concrete pipe. In this paper, a survey of both design methods is presented. The development of the indirect design method is given with emphasis on changes in the bedding factor. The bedding factor relates the strength of pipe in the three-edge-bearing test to the strength of pipe in the installed condition. The development of the standard installations and direct design method are presented and a comparison between design results from both methods is made. Recommendations for reinforced concrete pipe design and the proper application of the bedding factor are presented. The direct design method is promoted as a superior method for the design of reinforced concrete pipe.


  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 18p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01045903
  • Record Type: Publication
  • Report/Paper Numbers: 07-2531
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 7:13PM