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Geometrical influence on transverse thermal stresses in concrete bridge sections

Larsson, Oskar LU (2013) Long Span Bridges and Roofs - Development, Design and Implementation, IABSE Symposium In [Host publication title missing]
Abstract
The temperature in a concrete bridge is affected by complex interactions of climatic factors. Varying concrete temperature will give rise to movements in the longitudinal as well as the transverse directions. Inspections of certain box girder bridges have shown cracks in only the thin vertical walls, which may be an indication of a geometrical influence. A sequence of climate input data deemed as an extreme event in a previous study was used to calculate the transverse thermal stresses in concrete box-sections with various geometries. The results show that the most influencing geometrical parameter is the member thickness ratio. If the thicknesses in the horizontal slabs and the vertical walls are different, large tensile stresses will... (More)
The temperature in a concrete bridge is affected by complex interactions of climatic factors. Varying concrete temperature will give rise to movements in the longitudinal as well as the transverse directions. Inspections of certain box girder bridges have shown cracks in only the thin vertical walls, which may be an indication of a geometrical influence. A sequence of climate input data deemed as an extreme event in a previous study was used to calculate the transverse thermal stresses in concrete box-sections with various geometries. The results show that the most influencing geometrical parameter is the member thickness ratio. If the thicknesses in the horizontal slabs and the vertical walls are different, large tensile stresses will occur in the section. The actual thickness is not as important, nor whether the slabs or walls are the thinner parts. The width and height of the cross-section is not as influential as the thickness ratio. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
FE-model, concrete, geometry, solar radiation, thermal actions, KstrConcrete
in
[Host publication title missing]
pages
8 pages
publisher
International Association for Bridge and Structural Engineering
conference name
Long Span Bridges and Roofs - Development, Design and Implementation, IABSE Symposium
external identifiers
  • Scopus:84929379381
language
English
LU publication?
yes
id
118a4426-9666-43ef-850e-4a4dd4834519 (old id 4180595)
alternative location
http://www.ingentaconnect.com/content/iabse/report/2013/00000101/00000010/art00001
date added to LUP
2013-12-03 16:08:08
date last changed
2017-01-01 08:06:01
@inproceedings{118a4426-9666-43ef-850e-4a4dd4834519,
  abstract     = {The temperature in a concrete bridge is affected by complex interactions of climatic factors. Varying concrete temperature will give rise to movements in the longitudinal as well as the transverse directions. Inspections of certain box girder bridges have shown cracks in only the thin vertical walls, which may be an indication of a geometrical influence. A sequence of climate input data deemed as an extreme event in a previous study was used to calculate the transverse thermal stresses in concrete box-sections with various geometries. The results show that the most influencing geometrical parameter is the member thickness ratio. If the thicknesses in the horizontal slabs and the vertical walls are different, large tensile stresses will occur in the section. The actual thickness is not as important, nor whether the slabs or walls are the thinner parts. The width and height of the cross-section is not as influential as the thickness ratio.},
  author       = {Larsson, Oskar},
  booktitle    = {[Host publication title missing]},
  keyword      = {FE-model,concrete,geometry,solar radiation,thermal actions,KstrConcrete},
  language     = {eng},
  pages        = {8},
  publisher    = {International Association for Bridge and Structural Engineering},
  title        = {Geometrical influence on transverse thermal stresses in concrete bridge sections},
  year         = {2013},
}