A SYSTEM FOR THE OPTIMUM DESIGN OF HIGHWAY BRIDGES

A set of computer programs for the automated design of highway bridge girders was developed in this project. The system consists of four completely separate programs, each performing one task. These programs are: continuous girder analysis and automated minimum cost design of uniform depth girders, variable depth girders and hydrid girders. These programs are written in FORTRAN IV and consist of a large number of subroutines. Many of these subroutines are common for the various programs. The continous girder analysis program obtains critical moment and shear envelopes for the standard AASHO loads. The program will accept variable cross section input. A variety of information including allowable stresses, actual stresses, deflections and influence lines can be obtained with the level of detail under the control of the user. The uniform depth girder design program obtains the minimum cost design of a continuous welded plate girder having a uniform web depth. The flange thickness can change along the span. Unit cost data, pier spacing and girder spacing must be supplied by the user. This program, employing mathematical programming techniques, will select the best arrangement of material sizes and flange splices to obtain the minimum cost design. The general procedures used in this program are also used in the variable depth and hybrid girder design programs. The variable depth program will design variable depth girders for continous highway bridges. Depth changes can be stepped, linear or quadratic along the span. The flange can also change thicknesses. The hybrid girder design program will design uniform web depth girders, using different steels in the flange and the web. The steel type and thickness in the flange can change along the span.

  • Supplemental Notes:
    • Study conducted in cooperation with FHWA.
  • Corporate Authors:

    Case Western Reserve University

    Department of Solid Mechanics, Structure & Mechanical Design
    Cleveland, OH  USA  44106
  • Authors:
    • Goble, G G
    • Desantis, P V
    • Yeung, J
  • Publication Date: 1974-3

Media Info

  • Pagination: 181 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00139816
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-OH-20-75 Final Rpt.
  • Contract Numbers: Job 14182(0)
  • Files: TRIS, USDOT
  • Created Date: Oct 6 1976 12:00AM