Crack widths near reinforcement bars for beams in bending
(2009) In Structural Concrete 10(1). p.27-34- Abstract
- Earlier research performed on axially loaded concrete prisms shows that crack widths close to reinforcement are smaller and less dependent on concrete cover than crack widths at the concrete surface. To check practical applicability of these results a similar experimental investigation of cracking behaviour has been undertaken for beams loaded in bending. The influence of steel stress and concrete cover on crack widths close to the reinforcement and at the concrete surface has been investigated. The results show that the main features of cracking behaviour for axially loaded prisms and beams are similar. Beams resemble axially loaded prisms in that cone-shaped concrete failure occurs in the bond zone where the bar meets a crack. At higher... (More)
- Earlier research performed on axially loaded concrete prisms shows that crack widths close to reinforcement are smaller and less dependent on concrete cover than crack widths at the concrete surface. To check practical applicability of these results a similar experimental investigation of cracking behaviour has been undertaken for beams loaded in bending. The influence of steel stress and concrete cover on crack widths close to the reinforcement and at the concrete surface has been investigated. The results show that the main features of cracking behaviour for axially loaded prisms and beams are similar. Beams resemble axially loaded prisms in that cone-shaped concrete failure occurs in the bond zone where the bar meets a crack. At higher steel stresses this concrete cone follows the displacement. For this reason crack widths close to the bar are significantly smaller and much less affected by the thickness of concrete cover than at the concrete surface. Surface crack widths consequently are poor indicators of the potential for exposure to corrosive attacks on reinforcement and current design methods can be counter-productive for service life of concrete structures. [doi: 10.1680/stco.2009.10.1.27] (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1697986
- author
- Tammo, Kristian LU and Thelandersson, Sven LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Structural Concrete
- volume
- 10
- issue
- 1
- pages
- 27 - 34
- publisher
- Thomas Telford
- external identifiers
-
- wos:000281590000005
- scopus:67849094153
- ISSN
- 1751-7648
- DOI
- 10.1680/stco.2009.10.1.27
- language
- English
- LU publication?
- yes
- id
- 15a8c93a-b7a0-429d-8b54-f146dc477d5c (old id 1697986)
- date added to LUP
- 2016-04-01 12:14:35
- date last changed
- 2022-03-28 22:13:18
@article{15a8c93a-b7a0-429d-8b54-f146dc477d5c,
abstract = {{Earlier research performed on axially loaded concrete prisms shows that crack widths close to reinforcement are smaller and less dependent on concrete cover than crack widths at the concrete surface. To check practical applicability of these results a similar experimental investigation of cracking behaviour has been undertaken for beams loaded in bending. The influence of steel stress and concrete cover on crack widths close to the reinforcement and at the concrete surface has been investigated. The results show that the main features of cracking behaviour for axially loaded prisms and beams are similar. Beams resemble axially loaded prisms in that cone-shaped concrete failure occurs in the bond zone where the bar meets a crack. At higher steel stresses this concrete cone follows the displacement. For this reason crack widths close to the bar are significantly smaller and much less affected by the thickness of concrete cover than at the concrete surface. Surface crack widths consequently are poor indicators of the potential for exposure to corrosive attacks on reinforcement and current design methods can be counter-productive for service life of concrete structures. [doi: 10.1680/stco.2009.10.1.27]}},
author = {{Tammo, Kristian and Thelandersson, Sven}},
issn = {{1751-7648}},
language = {{eng}},
number = {{1}},
pages = {{27--34}},
publisher = {{Thomas Telford}},
series = {{Structural Concrete}},
title = {{Crack widths near reinforcement bars for beams in bending}},
url = {{http://dx.doi.org/10.1680/stco.2009.10.1.27}},
doi = {{10.1680/stco.2009.10.1.27}},
volume = {{10}},
year = {{2009}},
}