Parametric study of continuous prestressed composite girders

Wenxia Tong, Hamid Saadatmanesh

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

The technique of prestressing has been used successfully to improve the performance of existing concrete structures However very few applications of this technique can be found in steel structures Prestressing by means of highstrength cable or bar can be used to effectively increase the working load and the ultimate capacity of composite steel-concrete girders The benefits of prestressing the steel wide flange section in composite construction can be achieved in strengthening of existing structures as well as in the design of new structures In this paper the elastic behavior of continuous prestressed composite girders with straight and draped tendon profiles is examined The effects of design variables such as the prestress force tendon eccentricity and tendon length on the working load and deflection of girders are studied The results show that the allowable load of girder increases proportionally with increase in prestress force and eccentricity The effect of load pattern on the change in tendon force is also examined Different prestressing sequences and resulting moments are discussed A design example is presented to demonstrate the effectiveness of prestressing for strengthening of girders in existing composite-steel concrete bridges.

Original languageEnglish (US)
Pages (from-to)186-206
Number of pages21
JournalJournal of Structural Engineering (United States)
Volume118
Issue number1
DOIs
StatePublished - Jan 1992

ASJC Scopus subject areas

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

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