The Effects of Long-Term Behavior of Both Concrete and Prestressing Tendons on the Delayed Deflection of a Prestressed Structure

This work aims at putting in evidence the coupled effects of both delayed deformations of concrete and relaxation of prestressing steel on the long term behavior of long span bridges. After recalling the possible origins of delayed deformations of prestressed concrete structures, the example of the Savines bridge is presented. This 65-year-old bridge shows excessive deflections at mid-spans which can not be predicted by the current Eurocode 2 creep laws, unless artificial coefficients are adjusted. Then a simplified prestressed cantilever beam is considered allowing to quasi-analytically address the problem of interaction between concrete creep and steel relaxation. The resolution of this problem with ageing material laws which are adapted from Eurocode 2 highlights the importance of the evolution of steel tendons after decades and allows to question the validity of laws used in models and the difficulty to identify the contributions of concrete and steel in the evolution of the deflection.

• Record URL:
  https://doi.org/10.1061/9780784479346.075
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784479346
• Supplemental Notes:
  • © 2015 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Barthélémy, J F
  • Sellin, J P
  • Torrenti, J M
• Conference:
  • 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures
  • Location: Vienna , Austria
  • Date: 2015-9-21 to 2015-9-23
• Publication Date: 2015-9

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 621-630
• Monograph Title: CONCREEP 10: Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures

Subject/Index Terms

• TRT Terms: Concrete structures; Creep; Deflection; Deformation; Long span bridges; Tendons (Materials)
• Subject Areas: Bridges and other structures; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 01576646
• Record Type: Publication
• ISBN: 9780784479346
• Files: TRIS, ASCE
• Created Date: Sep 25 2015 4:20PM