Fire resistance of concrete filled square steel tube columns subjected to eccentric axial load

Su Hee Park, Sung Mo Choi, Jae Yong Ryoo, Kwang Ho Lee, Sung Yeol Woo, Sun Hee Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The fire resistance of concrete filled square steel tube columns (CFT columns) without fire protection under constant axial load has been examined. The purpose of this study is to investigate the fire resistance of CFT columns subjected to combined loads. In the first step, this paper presents a nonlinear thermal stress analysis method for predicting the mechanical behavior and fire resistance of these columns under eccentric axial load (axial load and flexure moment). This method is based on the stress-strain characteristics of materials at high temperatures and the mechanics of column deflection curves. From the results of the developed computational technique, it was demonstrated that as the yield stress and rigidity of the steel tube decreased rapidly for about 30 minutes, the decrease of flexure moment capacity became much smaller than that of the axial load capacity. In addition, as the eccentricity increased, the fire resistance time drastically decreased. However, the time of maximum expansion under eccentric axial load did not depend on the eccentricity of the load.

Original languageEnglish
Title of host publication5th International Conference on Advances in Steel Structures, ICASS 2007
Pages675-683
Number of pages9
StatePublished - 2007
Event5th International Conference on Advances in Steel Structures, ICASS 2007 - Singapore, Singapore
Duration: 5 Dec 20077 Dec 2007

Publication series

Name5th International Conference on Advances in Steel Structures, ICASS 2007
Volume3

Conference

Conference5th International Conference on Advances in Steel Structures, ICASS 2007
Country/TerritorySingapore
CitySingapore
Period5/12/077/12/07

Fingerprint

Dive into the research topics of 'Fire resistance of concrete filled square steel tube columns subjected to eccentric axial load'. Together they form a unique fingerprint.

Cite this