Redistribution of internal forces in RC beams due to fire action
Authors:
- Krzysztof Chudyba
Abstract
Due to the fire temperature action material properties (for RC structures - for concrete and reinforcing steel) are subjected to degradation. This results in the reduction of stiffness of cross-section of the elements and finally in redistribution of internal forces for statically indeterminate structural systems (for continuous beams and slabs, for frames). Thus it is important to take into account these effects while carrying out the fire design of such structures, because as a result of internal forces redistribution the ultimate limit state in fire situation may be achieved earlier than for analysis neglecting these effects. In the paper there is analyzed the question of stress redistribution for cross-sections of RC beam fixed at both ends subjected to the action of dead and live loads on its upper surface as well as the fire temperature acting from the other three sides of the beam. The temperature change with the time was assumed in accordance with standard fire curve (ISO 834). Analysis was carried out with the finite element method (FEM) with the application of Abaqus program. Results of analysis indicate the importance of redistribution effects for longer fire duration time (more than 90 min) and the redistribution includes the reduction in values obtained for span crosssection and increase in support one.
- Record ID
- CUT5bad96299b5b4240919a853aa82f6d8f
- Publication categories
- ; ;
- Author
- Journal series
- IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981, e-ISSN 1757-899X, Irregular
- Issue year
- 2019
- Vol
- 471
- Pages
- [1-10]
- Article number
- 052013
- Other elements of collation
- rys.; wykr.; Bibliografia (na s.) - 10; Bibliografia (liczba pozycji) - 8; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 471
- Substantive notes
- Session 4
- Conference
- 3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium (WMCAUS 2018), 2018, 18-06-2018 - 22-06-2018, Prague, Czechy
- Keywords in English
- reinforced concrete, fire action, redistribution of internal forces
- DOI
- DOI:10.1088/1757-899X/471/5/052013 Opening in a new tab
- URL
- https://iopscience.iop.org/article/10.1088/1757-899X/471/5/052013 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 5
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT5bad96299b5b4240919a853aa82f6d8f/
- URN
urn:pkr-prod:CUT5bad96299b5b4240919a853aa82f6d8f
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.