University of Illinois Urbana-Champaign

Time-Dependent Behavior of Noncomposite and Composite Post-Tensioned Concrete Girder Bridges

Fadl, Abdullahi Ibrahim; Gamble, W.L.

Content Files
SRS-430.pdf

Permalink

https://hdl.handle.net/2142/13845

Description

Title
Time-Dependent Behavior of Noncomposite and Composite Post-Tensioned Concrete Girder Bridges
Author(s)
  • Fadl, Abdullahi Ibrahim
  • Gamble, W.L.
Issue Date
1976-10
Keyword(s)
  • Post-tensioned concrete
  • Concrete -- Creep
  • Steel -- Relaxation
Date of Ingest
2009-09-29T01:32:22Z
Abstract
A method for the analysis of time-dependent deformations in a continuous posttensioned concrete girder is presented. The creep and shrinkage properties of the concrete and the relaxation of the steel can be varied, as can friction between strands and ducts. Recommendations are made for estimating long-term prestress losses for structures post-tensioned with either stress-relieved or low-relaxation strands. Large changes in stress distributions were found to occur at cross sections, and substantial changes in the moment distribution can occur, especially in composite structures. These changes may occur even when there is only a small change in the steel force, and consequently the changes in concrete stress with time may not be closely related to the changes in steel stress.
Publisher
University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report Name or Number
Civil Engineering Studies SRS-430
Type of Resource
text
Genre of Resource
Technical Report
Language
en
Permalink
http://hdl.handle.net/2142/13845
Sponsor(s)/Grant Number(s)
State of Illinois Department of Transportation

Owning Collections

Civil Engineering Studies: Structural Research Series PRIMARY