Simulation of Thermal Load Distribution in Portal Frame Bridges
(2017) In Engineering Structures 143. p.219-231- Abstract
- Uneven exposure to e.g. solar radiation can cause temperature differences between various structural parts of a bridge, which leads to tensile stresses if the parts cannot move freely. In this study, thermal simulations and stress calculations on a model of a portal frame bridge are performed with the aim of evaluating the temperature difference between the bridge parts. Factorial design is used in a parametric study to determine the influence of different factors on the temperature difference and the largest reasonable temperature difference obtainable for the chosen weather data. The study shows that the quasi-permanent temperature difference between parts which is proposed by Eurocode 1 is overestimated, causing tensile stresses in the... (More)
- Uneven exposure to e.g. solar radiation can cause temperature differences between various structural parts of a bridge, which leads to tensile stresses if the parts cannot move freely. In this study, thermal simulations and stress calculations on a model of a portal frame bridge are performed with the aim of evaluating the temperature difference between the bridge parts. Factorial design is used in a parametric study to determine the influence of different factors on the temperature difference and the largest reasonable temperature difference obtainable for the chosen weather data. The study shows that the quasi-permanent temperature difference between parts which is proposed by Eurocode 1 is overestimated, causing tensile stresses in the transverse direction to be exaggerated significantly. Using the design method proposed by Eurocode 1 is therefore likely to overestimate the required reinforcement in crack width limit design, which in turn would lead to unnecessary costs and environmental impacts. The results also indicate that the temperature distribution within the bridge is different from what is given in Eurocode load cases, and consequently, the largest tensile stresses appear in other areas of the bridge. A simplified temperature distribution is therefore investigated and shown to give similar results as the detailed thermal simulations. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/702190a7-0bd8-4e1d-9e80-b4a68927a636
- author
- Gottsäter, Erik LU ; Larsson Ivanov, Oskar LU ; Molnár, Miklós LU ; Crocetti, Roberto LU ; Nilenius, Filip and Plos, Mario
- organization
- publishing date
- 2017-04-21
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Engineering Structures
- volume
- 143
- pages
- 13 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85018500843
- wos:000401880300017
- ISSN
- 0141-0296
- DOI
- 10.1016/j.engstruct.2017.04.012
- project
- Modeling and evaluation of restraint forces in concrete bridges
- language
- English
- LU publication?
- yes
- id
- 702190a7-0bd8-4e1d-9e80-b4a68927a636
- date added to LUP
- 2017-04-21 13:27:14
- date last changed
- 2022-04-17 01:11:40
@article{702190a7-0bd8-4e1d-9e80-b4a68927a636,
abstract = {{Uneven exposure to e.g. solar radiation can cause temperature differences between various structural parts of a bridge, which leads to tensile stresses if the parts cannot move freely. In this study, thermal simulations and stress calculations on a model of a portal frame bridge are performed with the aim of evaluating the temperature difference between the bridge parts. Factorial design is used in a parametric study to determine the influence of different factors on the temperature difference and the largest reasonable temperature difference obtainable for the chosen weather data. The study shows that the quasi-permanent temperature difference between parts which is proposed by Eurocode 1 is overestimated, causing tensile stresses in the transverse direction to be exaggerated significantly. Using the design method proposed by Eurocode 1 is therefore likely to overestimate the required reinforcement in crack width limit design, which in turn would lead to unnecessary costs and environmental impacts. The results also indicate that the temperature distribution within the bridge is different from what is given in Eurocode load cases, and consequently, the largest tensile stresses appear in other areas of the bridge. A simplified temperature distribution is therefore investigated and shown to give similar results as the detailed thermal simulations.}},
author = {{Gottsäter, Erik and Larsson Ivanov, Oskar and Molnár, Miklós and Crocetti, Roberto and Nilenius, Filip and Plos, Mario}},
issn = {{0141-0296}},
language = {{eng}},
month = {{04}},
pages = {{219--231}},
publisher = {{Elsevier}},
series = {{Engineering Structures}},
title = {{Simulation of Thermal Load Distribution in Portal Frame Bridges}},
url = {{http://dx.doi.org/10.1016/j.engstruct.2017.04.012}},
doi = {{10.1016/j.engstruct.2017.04.012}},
volume = {{143}},
year = {{2017}},
}