Short- and long-term measurements of resonance frequencies on prestressed concrete beams

Peter Lundqvist, Nils Rydén

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

Abstract

Currently, no method exists for determining the prestress forces in prestressed concrete structures. According to the theory of acoustoelasticity, the modulus of elasticity of concrete is stress dependent, which means that the resonance frequency of a concrete structure also is stress dependent. In this study, both short-term and long-term measurements of the resonance frequencies of four prestressed concrete beams were performed. The results show that the acoustoelastic effect in concrete is measureable and that the resonance frequencies increase with the applied compressive stress and that the prestress losses can be monitored through measurements of the resonance frequencies.
Original languageEnglish
Title of host publicationNordic Concrete Research
PublisherThe Nordic Concrete Federation
Volume43
ISBN (Print)978-82-8208-025-5
Publication statusPublished - 2011
EventXXI Nordic Concrete Research Symposia, 2011 - Hämeenlinna, Finland
Duration: 2011 May 302011 Jun 1

Publication series

Name
Number1
Volume43
ISSN (Print)0800-6377

Conference

ConferenceXXI Nordic Concrete Research Symposia, 2011
Country/TerritoryFinland
CityHämeenlinna
Period2011/05/302011/06/01

Subject classification (UKÄ)

  • Building Technologies
  • Geotechnical Engineering

Keywords

  • KstrConcrete

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