Analytical prediction of transfer length in prestressed self-consolidating concrete girders using pull-out test results

Andrew Pozolo, Bassem O Andrawes

Research output: Contribution to journalArticlepeer-review

Abstract

While self-consolidating concrete (SCC) is comparable to conventional concrete (CC) in terms of strength, the comparability of SCC's bond to steel is less well-defined. A keen understanding of SCC's bond strength is essential to advance SCC within the prestressed concrete industry. This study presents an analytical method for predicting the transfer length of steel strands in prestressed girders using pull-out test results. The experimental data from a series of 56 pull-out tests is utilized to derive bond stress-slip relationships for 12.7 mm steel strands embedded in SCC and CC. Modification factors are used to correlate pullout bond stresses to transfer bond stresses in prestressed members, and the modified relationships are integrated in three-dimensional finite element models to predict transfer lengths in prestressed SCC girders. The analytical predictions correlate well with experimental results and transfer length requirements of current US design codes.

Original languageEnglish (US)
Pages (from-to)1026-1036
Number of pages11
JournalConstruction and Building Materials
Volume25
Issue number2
DOIs
StatePublished - Feb 1 2011

Keywords

  • Finite element analysis
  • Pull-out test
  • Self-consolidating concrete
  • Transfer length

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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