Abstract
A certain amount of analytical methods for determining fire resistance of concrete filled steel tubular columns are developed. Mostly those methods refer to or have as an origin the data about the results of real experiments. The research work on this kind of composite column behaviour under fire conditions with a wide range of different parameters measuring was performed. The behaviour of 16 axially loaded HC‐FST (hollow concrete filled steel tubular) columns without fire protection under conditions similar to ISO‐834 fire and under normal conditions was experimentally investigated and the results are presented in this paper. The experimental values of fire resistance were measured and the failure mode was determined for 4 axially loaded columns. And for the comparison of test parameters, 4 axially loaded HC‐FST columns were tested under normal conditions. In addition, 8 hollow concrete‐filled steel tubular stub columns and 4 hollow concrete tubular stub columns under normal conditions were tested. The final objective was to prepare experimental data for analysis and to find some analytical dependence between test parameters with the most significant influence on the fire results of HC‐FST columns.
Highlights
The use of HC-FST (Hollow Concrete-Filled Steel Tubular) columns has become widespread in the countries, where it is used for building tall buildings
The mean trial fire resistance of HC-FST columns tested by loading them with 40 % of their mean trial loadbearing capacity under normal conditions and heated according to a temperature curve close to the standard temperature curve was 44,3 min
The necessary fire resistance of concrete filled hollow steel section columns can generally be achieved without any fire protection covers
Summary
The use of HC-FST (Hollow Concrete-Filled Steel Tubular) columns has become widespread in the countries, where it is used for building tall buildings. Some researches [1, 2] were performed to find assumptions or initial data necessary for creating methods to determine the fire resistance of C-FST columns. Some information about this kind of experiments – testing course and the results is given in [3, 4]. The main objectives of the experimental program and this paper are threefold: 1) to describe a series of tests on composite columns exposed to standard fire and subjected to axial load, 2) to develop a mechanics model for HC-FST columns exposed to standard fire, 3) to prepare experimental data for analysis of the influence of the changing sectional dimension of column – thickness of the hollow concrete core on the fire resistance of structure
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
