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

Lundqvist, Peter LU and Rydén, Nils LU (2011) XXI Nordic Concrete Research Symposium In Nordic Concrete Research 43(1).
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.
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
KstrConcrete
in
Nordic Concrete Research
volume
43
issue
1
publisher
The Nordic Concrete Federation
conference name
XXI Nordic Concrete Research Symposium
ISSN
0800-6377
ISBN
978-82-8208-025-5
language
English
LU publication?
yes
id
072a1042-cb35-4b7e-afcd-69dca8db93c1 (old id 1988309)
date added to LUP
2011-06-28 10:27:03
date last changed
2016-04-16 00:18:18
@inproceedings{072a1042-cb35-4b7e-afcd-69dca8db93c1,
  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.},
  author       = {Lundqvist, Peter and Rydén, Nils},
  booktitle    = {Nordic Concrete Research},
  isbn         = {978-82-8208-025-5},
  issn         = {0800-6377},
  keyword      = {KstrConcrete},
  language     = {eng},
  number       = {1},
  publisher    = {The Nordic Concrete Federation},
  title        = {Short- and long-term measurements of resonance frequencies on prestressed concrete beams},
  volume       = {43},
  year         = {2011},
}