Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Experimental investigation of structural steel beams subjected to localized fire



Selvarajah Ramesh, Lisa Y. Choe, Chao Zhang


This paper presents an experimental behavior of unprotected W16 × 26 steel beams subjected to localized fire. Beam specimens were either simply supported or connected to steel columns via all bolted double angle connections. Two test fires, steady or transient heating, were produced using a natural gas fueled burner located below the center of the beams. Thermal and structural responses of the steel beams as well as the heat release rate and applied forces were measured. The tests showed that all specimens failed by lateral-torsional buckling regardless of fire loading and end support conditions. The results highlight that the heating conditions and end restraints influence the behavior of steel beams under localized fire. The experimental results presented can be used for validation of predictive models in order to improve deign methods for localized fire conditions.
Engineering Structures


Experimental investigation, localized fire, steel beam, thermal restraint, lateral-torsional buckling, failure temperature


Ramesh, S. , Choe, L. and Zhang, C. (2020), Experimental investigation of structural steel beams subjected to localized fire, Engineering Structures, [online], (Accessed June 23, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created May 29, 2020, Updated June 8, 2020