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Crack widths in base restrained walls subjected to restraint loading

Gottsäter, Erik LU ; Johansson, Morgan ; Plos, Mario and Larsson Ivanov, Oskar LU (2019) In Engineering Structures 189. p.272-285
Abstract
Cracks in concrete structures can have a negative impact on durability and aesthetic appearance. It is therefore important to estimate crack widths before construction, and to use suitable reinforcement amounts to limit crack widths. Crack widths are however hard to predict in restrained structures, as cracking reduces the stiffness, which in turn reduces the restraint and thereby the amount of cracking. In this paper, nonlinear finite element analyses of cracking are performed on base restrained walls mainly subjected to shrinkage. A non-linear material model for concrete and a bond-slip relation for concrete – reinforcement interaction are used. The model does not include the hardening process of concrete but instead applies the load... (More)
Cracks in concrete structures can have a negative impact on durability and aesthetic appearance. It is therefore important to estimate crack widths before construction, and to use suitable reinforcement amounts to limit crack widths. Crack widths are however hard to predict in restrained structures, as cracking reduces the stiffness, which in turn reduces the restraint and thereby the amount of cracking. In this paper, nonlinear finite element analyses of cracking are performed on base restrained walls mainly subjected to shrinkage. A non-linear material model for concrete and a bond-slip relation for concrete – reinforcement interaction are used. The model does not include the hardening process of concrete but instead applies the load effects on mature concrete, and is validated by comparisons with test results from full scale tests performed in previous research. Additionally, a sensitivity study is made to investigate the influence of certain parameters on crack widths and crack patterns. The intention is to use the model in the development of a model to be used in design of concrete structures which takes restraint effects into account in an improved, yet a simplified way. The results show that the model gives realistic crack patterns, but that it tends to overestimate crack widths and the number of cracks obtained. Therefore, the model is considered to be acceptable. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Engineering Structures
volume
189
pages
14 pages
publisher
Elsevier
external identifiers
  • scopus:85063436352
ISSN
0141-0296
DOI
10.1016/j.engstruct.2019.03.089
project
Modeling and evaluation of restraint forces in concrete bridges
language
English
LU publication?
yes
id
bd0fcd4c-2745-4c70-a0cd-47f8025d452d
date added to LUP
2019-04-01 15:24:50
date last changed
2020-08-12 08:33:16
@article{bd0fcd4c-2745-4c70-a0cd-47f8025d452d,
  abstract     = {Cracks in concrete structures can have a negative impact on durability and aesthetic appearance. It is therefore important to estimate crack widths before construction, and to use suitable reinforcement amounts to limit crack widths. Crack widths are however hard to predict in restrained structures, as cracking reduces the stiffness, which in turn reduces the restraint and thereby the amount of cracking. In this paper, nonlinear finite element analyses of cracking are performed on base restrained walls mainly subjected to shrinkage. A non-linear material model for concrete and a bond-slip relation for concrete – reinforcement interaction are used. The model does not include the hardening process of concrete but instead applies the load effects on mature concrete, and is validated by comparisons with test results from full scale tests performed in previous research. Additionally, a sensitivity study is made to investigate the influence of certain parameters on crack widths and crack patterns. The intention is to use the model in the development of a model to be used in design of concrete structures which takes restraint effects into account in an improved, yet a simplified way. The results show that the model gives realistic crack patterns, but that it tends to overestimate crack widths and the number of cracks obtained. Therefore, the model is considered to be acceptable.},
  author       = {Gottsäter, Erik and Johansson, Morgan and Plos, Mario and Larsson Ivanov, Oskar},
  issn         = {0141-0296},
  language     = {eng},
  pages        = {272--285},
  publisher    = {Elsevier},
  series       = {Engineering Structures},
  title        = {Crack widths in base restrained walls subjected to restraint loading},
  url          = {http://dx.doi.org/10.1016/j.engstruct.2019.03.089},
  doi          = {10.1016/j.engstruct.2019.03.089},
  volume       = {189},
  year         = {2019},
}