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Validation of Temperature Simulations in a Portal Frame Bridge

Gottsäter, Erik LU ; Larsson Ivanov, Oskar LU ; Molnár, Miklós LU and Plos, Mario (2018) In Structures 15. p.341-348
Abstract
In the design of bridges, thermal loads are important to take into account since they can cause cracking if the structure or structural part is restrained from changing its size. Accurate thermal load values must therefore be used in bridge design, based on knowledge of the actual temperature distribution in the bridge. This paper presents the validation of a model for temperature simulation, to be used in future work in the determination of temperature differences between deck and abutments in portal frame bridges. The validation is performed by comparing simulated temperatures with temperatures measured at 13 locations in a portal frame bridge during a period of 12 months. The simulation model uses measured air temperature, wind speed... (More)
In the design of bridges, thermal loads are important to take into account since they can cause cracking if the structure or structural part is restrained from changing its size. Accurate thermal load values must therefore be used in bridge design, based on knowledge of the actual temperature distribution in the bridge. This paper presents the validation of a model for temperature simulation, to be used in future work in the determination of temperature differences between deck and abutments in portal frame bridges. The validation is performed by comparing simulated temperatures with temperatures measured at 13 locations in a portal frame bridge during a period of 12 months. The simulation model uses measured air temperature, wind speed and long- and short wave radiation as input to calculate the temperature for every hour in the time period, and includes the soil beside the bridge. The results show that the model was capable of predicting the temperature distribution adequately, and that conservative values of the temperature difference between the structural parts can be obtained by adding no more than a ΔT of 1.5 °C to the simulated temperature difference, depending on the application. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
validation, Temperature, Measurement, Simulation, Portal frame bridge, Concrete
in
Structures
volume
15
pages
341 - 348
publisher
Elsevier
external identifiers
  • scopus:85051019389
ISSN
2352-0124
DOI
10.1016/j.istruc.2018.07.007
language
English
LU publication?
yes
id
4489f711-ba5c-4d96-b755-aabd35863e3b
date added to LUP
2018-08-09 10:30:43
date last changed
2019-02-20 11:23:57
@article{4489f711-ba5c-4d96-b755-aabd35863e3b,
  abstract     = {In the design of bridges, thermal loads are important to take into account since they can cause cracking if the structure or structural part is restrained from changing its size. Accurate thermal load values must therefore be used in bridge design, based on knowledge of the actual temperature distribution in the bridge. This paper presents the validation of a model for temperature simulation, to be used in future work in the determination of temperature differences between deck and abutments in portal frame bridges. The validation is performed by comparing simulated temperatures with temperatures measured at 13 locations in a portal frame bridge during a period of 12 months. The simulation model uses measured air temperature, wind speed and long- and short wave radiation as input to calculate the temperature for every hour in the time period, and includes the soil beside the bridge. The results show that the model was capable of predicting the temperature distribution adequately, and that conservative values of the temperature difference between the structural parts can be obtained by adding no more than a ΔT of 1.5 °C to the simulated temperature difference, depending on the application.},
  author       = {Gottsäter, Erik and Larsson Ivanov, Oskar and Molnár, Miklós and Plos, Mario},
  issn         = {2352-0124},
  keyword      = {validation,Temperature,Measurement,Simulation,Portal frame bridge,Concrete},
  language     = {eng},
  month        = {08},
  pages        = {341--348},
  publisher    = {Elsevier},
  series       = {Structures},
  title        = {Validation of Temperature Simulations in a Portal Frame Bridge},
  url          = {http://dx.doi.org/10.1016/j.istruc.2018.07.007},
  volume       = {15},
  year         = {2018},
}