Estmating Extreme Thermal Actions in Concrete Structures
(2010) The Third fib International Congress and Exhibition- Abstract
- The surrounding climate gives temperature variations in both time and space for concrete structures. Due to external and internal restraints thermal strains and stresses may develop in the structure and these stresses can contribute to cracking. This will affect the performance of the structure. To predict the dynamic thermal conditions in concrete structures a finite element model has been developed. Field temperature measurements in a concrete slab placed outdoors and measurements of climatic data are used for the validation of the model. A validation with input data from the Swedish Meteorological and Hydrological Institute has also been performed to be able to use the model for simulations over long time periods. The results show that... (More)
- The surrounding climate gives temperature variations in both time and space for concrete structures. Due to external and internal restraints thermal strains and stresses may develop in the structure and these stresses can contribute to cracking. This will affect the performance of the structure. To predict the dynamic thermal conditions in concrete structures a finite element model has been developed. Field temperature measurements in a concrete slab placed outdoors and measurements of climatic data are used for the validation of the model. A validation with input data from the Swedish Meteorological and Hydrological Institute has also been performed to be able to use the model for simulations over long time periods. The results show that the model can describe the effects from different climatic factors in extreme situations with good accuracy based on data from meteorological stations. It is important to use climatic data with a good resolution, since variations during the day can give unfavorable situations. The analyses with longer time periods show that the values for linear temperature gradients in the Eurocode could be underestimated for Swedish conditions. There is also a tendency towards geographical differences which has not been included before. An asphalt paving layer increases positive linear temperature gradients while they decrease with a concrete paving. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1661159
- author
- Larsson, Oskar LU
- organization
- publishing date
- 2010
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Extreme values, KstrConcrete, Thermal actions, Solar radiation
- host publication
- Proceedings Disc, The Third International fib Congress and Exhibition
- conference name
- The Third fib International Congress and Exhibition
- conference dates
- 2010-06-01
- language
- English
- LU publication?
- yes
- id
- b971479d-3923-4245-8d19-a48a84fca9f8 (old id 1661159)
- date added to LUP
- 2016-04-04 14:29:54
- date last changed
- 2018-11-21 21:20:40
@inproceedings{b971479d-3923-4245-8d19-a48a84fca9f8,
abstract = {{The surrounding climate gives temperature variations in both time and space for concrete structures. Due to external and internal restraints thermal strains and stresses may develop in the structure and these stresses can contribute to cracking. This will affect the performance of the structure. To predict the dynamic thermal conditions in concrete structures a finite element model has been developed. Field temperature measurements in a concrete slab placed outdoors and measurements of climatic data are used for the validation of the model. A validation with input data from the Swedish Meteorological and Hydrological Institute has also been performed to be able to use the model for simulations over long time periods. The results show that the model can describe the effects from different climatic factors in extreme situations with good accuracy based on data from meteorological stations. It is important to use climatic data with a good resolution, since variations during the day can give unfavorable situations. The analyses with longer time periods show that the values for linear temperature gradients in the Eurocode could be underestimated for Swedish conditions. There is also a tendency towards geographical differences which has not been included before. An asphalt paving layer increases positive linear temperature gradients while they decrease with a concrete paving.}},
author = {{Larsson, Oskar}},
booktitle = {{Proceedings Disc, The Third International fib Congress and Exhibition}},
keywords = {{Extreme values; KstrConcrete; Thermal actions; Solar radiation}},
language = {{eng}},
title = {{Estmating Extreme Thermal Actions in Concrete Structures}},
year = {{2010}},
}