Residual Strength of Concrete Filled RHS Stub Columns after Exposure to High Temperatures
- 1 April 2002
- journal article
- Published by SAGE Publications in Advances in Structural Engineering
- Vol. 5 (2), 123-134
- https://doi.org/10.1260/1369433021502614
Abstract
Tests are reported on twenty-six concrete filled steel tube of rectangular section after being exposed to high temperatures, to investigate the influence of temperature on section capacity and load-deformation behavior. The main parameter varied is temperature, from 20°C to 900°C. A mechanics model is described in this paper for the behaviour of concrete-filled RHS (Rectangular Hollow Section) columns after exposed to high temperatures, and is a development of the analysis (Han et al, 2001a) used when only normal temperatures apply. The predicted load versus axial strain relationship is in good agreement with stub column test results. Simplified models are derived for the section capacities and the modulus of elasticity of the composite sections. It was found in general, that the higher the exposure temperature, the higher the loss of section capacities and elastic modulus which resulted. The tests have shown the importance of the influence of high temperatures on the performance of concrete filled steel tubes. The work in this paper provides a basis for further theoretical study on the residual strength of concrete filled steel tubular columns.Keywords
This publication has 9 references indexed in Scilit:
- Fire performance of concrete filled steel tubular beam-columnsJournal of Constructional Steel Research, 2001
- Tests and mechanics model for concrete-filled SHS stub columns, columns and beam-columnsSteel and Composite Structures, 2001
- Research Toward Use of Unprotected Steel StructuresJournal of Structural Engineering, 2000
- Performance-based fire resistance design of concrete-filled steel columnsJournal of Constructional Steel Research, 1999
- The effects of structural continuity on the fire resistance of concrete filled columns in non-sway framesJournal of Constructional Steel Research, 1999
- Calculation of the fire resistance of steel hollow structural section columns filled with plain concreteCanadian Journal of Civil Engineering, 1994
- Fire Resistance of Circular Steel Columns Filled with Bar‐Reinforced ConcreteJournal of Structural Engineering, 1994
- Evaluation of the fire resistance of compression members using mathematical modelsFire Safety Journal, 1993
- Effect of exposure time and rates of heating and cooling on residual strength of heated concreteMagazine of Concrete Research, 1986