TIME-DEPENDENT DEFORMATIONS AND LOSSES IN CONCRETE BRIDGES BUILT BY THE CANTILEVER METHOD

A method is presented for the analysis of time-dependent deformations of post-tensioned concrete bridge superstructures which are erected by cantilever methods. The method takes into account any arbitrary creep and shrinkage properties of the concrete, friction between strand and ducts, relaxation of the steel stress, and construction loads. A step-by-step procedure is presented which takes into account the creep of concrete under variable stress, variations in Young's modulus of concrete, and all elastic changes in stress accompanying the construction of additional segments. The analysis method was used to study the effects of variations of the parameters on the long-term behavior of two bridges which were built and designed following quite different criteria.

• Corporate Authors:

  University of Illinois, Urbana-Champaign

  Department of Civil and Environmental Engineering
  205 North Mathews Avenue
  Urbana, IL  United States  61801-2352
• Authors:
  • Danon, J R
  • Gamble, W L
• Publication Date: 1977-1

Media Info

• Features: References;
• Pagination: 169 p.

Subject/Index Terms

• TRT Terms: Bridge design; Bridge superstructures; Bridges; Cantilevers; Concrete; Concrete bridges; Concrete construction; Creep; Deformation; Modulus of elasticity; Prestressing; Relaxation (Mechanics); Shrinkage; Strength of materials; Stresses; Structural analysis; Structural design; Time dependence
• Old TRIS Terms: Cantilevered construction; Concrete creep; Concrete shrinkage; Post-tensioned concrete; Prestressed materials; Time dependent parameters
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00165786
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: Report No. 437
• Files: TRIS
• Created Date: Dec 27 1977 12:00AM