- Author
-
Seputro, J.
- Title
- Effect of Support Conditions on Steel Beams Exposed of Fire.
- Coporate
- University of Canterbury, Christchurch, New Zealand
- Report
-
Fire Engineering Research Report 01/6
March 2001
152 p.
- Distribution
- For more information contact: School of Engineering, University of Canterbury, Private Bag 4800, Christchurch, New Zealand. Telephone: 643-364-2250, Fax: 643-364-2758, Website: http://www.civil.canterbury.ac.nz
- Keywords
-
steel beams
|
concretes
|
steel structures
|
deflection
|
stress (mechanics)
|
thermal properties
|
mechanical properties
|
fire resistance rating
|
fire tests
- Identifiers
- SAFIR; analysis of results for four support conditions; effect of a spring at the support; comparison between different applied fires; comparison of different applied loads; comparison of various line of thrust locations
- Abstract
- The performance of steel structures at elevated temperature is determined by many factors. This report describes the analytical investigation of a single span steel beam using the non-linear finite element program, SAFIR. Four support conditions and additional axial spring were used to model structural elements with various level of axial and flexural restraint. Different fires were applied and the effect of the applied load, number of fire-exposed sides and location of the line of support were analysed in terms of the midspan deflection, bending moment distribution and axial force in the axially restraint beams. It was found that beams with axial restraint, especially those with rotational restraint are very sensitive to the stress-strain relationship of the steel at elevated temperatures. This research is intended to be a preliminary study leading to the detailed behavior of complex steel frames such as those tested at Cardington. Some important aspects that could not be included in this project need further investigation in future research.