AASHTO LRFD bridge design specifications provisions for loss of prestress

Brian D. Swartz, Andrew Scanlon, Andrea J. Schokker

Research output: Contribution to journalReview articlepeer-review

4 Scopus citations

Abstract

This paper details the American Association of State Highway and Transportation Officials' AASHTO LRFD Bridge Design Specifications time-dependent analysis method used for determining the loss of pre-stress in pretensioned bridge girders. The fundamental mechanics on which the method relies are explained in detail. New concepts introduced as part of the 2005 interim revisions are clarified. This paper aims to make the loss of prestress method more widely understood and more accurately applied in practice.

Original languageEnglish (US)
Pages (from-to)108-132
Number of pages25
JournalPCI Journal
Volume57
Issue number4
DOIs
StatePublished - 2012

Keywords

  • Creep
  • LRFD
  • Prestress gain
  • Prestress loss
  • Relaxation
  • Shrinkage
  • Transformed section

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