MSBOX - A COMPUTER PROGRAM FOR AUTOMATED DESIGN OF PRESTRESSED CONCRETE BOX GIRDER BRIDGES

A procedure for automated design by computer of multi-span prestressed concrete bridge girders is described, a user's guide for a computer program developed to apply the procedure is presented, and example designs are reviewed. The program uses a nonlinear programming procedure (SUMT) to design the depth, slab thicknesses, prestressing cable profile and jacking forces for multi-span box girders. Rational analyses for dead load, prestress loss due to friction, prestress loads and live loads are carried out, and minimum cost designs satisfying constraints on deflection, working load flexural stress, ultimate moment capacity and shear strength are produced. The program is limited to cast-in-situ girders of constant width with continuous prestressing, but is applicable to girders of variable depth, and can take account of stiff piers cast monolithically with the superstructure. Prestressing may be specified to be carried out from one anchorage only if desired.

• Corporate Authors:

  University of California, Berkeley

  Division of Structural Engineering and Structural Mechanics
  Berkeley, CA  United States  94720

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Ramakrishna, L V
  • Powell, G H
• Publication Date: 1974-9

Media Info

• Pagination: 114 p.

Subject/Index Terms

• TRT Terms: Automation; Beams; Box girders; Bridge design; Bridge members; Bridges; Computer programming; Computer programs; Concrete; Concrete bridges; Concrete structures; Design; Girder bridges; Girders; Highway bridges; Length; Nonlinear programming; Prestressed concrete; Reinforced concrete; Shear strength; Slabs; Structural design
• Uncontrolled Terms: Bridge spans; Reinforced concrete beams
• Subject Areas: Bridges and other structures; Design; Highways;

Filing Info

• Accession Number: 00093560
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: USCESM-74-18 Final Rpt., FHWA-RD-75-S0387
• Contract Numbers: HPR-1(12),D-4-53
• Files: NTIS, TRIS, USDOT
• Created Date: Jan 21 1976 12:00AM