A STRESSMETER FOR ASSESSING THE IN-SITU STRESSES IN CONCRETE BRIDGE STRUCTURES

This paper describes the progress made in the development of an indirect stressmeter to assess the in-situ stresses in concrete bridge structures - especially bridge decks. These stresses are invariably required to be known in the case of prestressed concrete bridges to determine whether the level of stress is as expected based on the original design, or whether there has been a significant loss of prestress for one reason or another. Since the last conference a large amount of testing has been carried out to check the reliability of the method and also to develop the most advantageous size and configuration from both economical and practical points of view. The reasons for the use of the steel - as opposed to an epoxy resin stressmeter - are given, and the results of tests carried out on various sizes of concrete cubes and prisms under the action of a uniaxial loading are presented. The results are then compared with what is expected under a known loading by the use of finite element models. Two possible sizes of stressmeter are proposed each consisting essentially of a steel cylinder with electrical resistance strain gauges bonded to the ends. (A) For the covering abstract see IRRD 882313.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 751-60

Subject/Index Terms

Filing Info

  • Accession Number: 00729513
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-419-21210-8
  • Files: ITRD
  • Created Date: Dec 26 1996 12:00AM