Prestressed composite girders ii: Analytical study for negative moment

Bilal M. Ayyub, Young G. Sohn, Hamid Saadatmanesh

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Abstract

A method for the structural analysis of prestressed composite steelconcrete girders was studied in this paper The deflections forces in the prestressing tendons and strains in the steel beam and concrete slab of composite girders were computed throughout the entire loading range up to failure Equations are provided for the calculation of the yield and ultimate load capacities of the girders The developed analytical models were based on the incremental deformation method The results of the analytical study were compared with test results of several girders Reasonably good correlations between analytical and experimental results were obtained Also the results showed that a substantial increase in the yield and an increase in the ultimate load capacities can be achieved by adding prestressing tendons to the composite girders and prestressing them It was determined that the most effective construction sequence for prestressed composite girders in negative moment regions is to posttension the composite girders with tendons in the concrete slabs

Original languageEnglish (US)
Pages (from-to)2763-2783
Number of pages21
JournalJournal of Structural Engineering (United States)
Volume118
Issue number10
DOIs
StatePublished - Oct 1992

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ASJC Scopus subject areas

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

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