Abstract
This paper represents the analytical process and manual calculation method of the flexural-torsional buckling behavior of thin-walled structure with monosymmetric cross-section in fire condition. A new design method using Rankine formula considering of restraint to thermal elongation is proposed. The load ratio vs. modified slenderness ratio curves and load ratio vs. rotation deformation curves of column under different elevated temperature condition are obtained. FEM (finite element method) nonlinear analysis is conducted using MSC.MARC Mentat to validate the new proposed method. The analytical results are reasonably accurate as compared to those of FEM analysis. The temperature-load ratio curves show that the fire resistance of channel column is not changed greatly until the temperature exceeds 450°C. Before the column arrives at its capacity corresponding to certain temperature, the higher the temperature, the bigger the torsional deformation, and the earlier the load-deformation curve declines to even.
| Original language | English |
|---|---|
| Pages (from-to) | 98-104 |
| Number of pages | 7 |
| Journal | Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture & Technology |
| Volume | 39 |
| Issue number | 1 |
| Publication status | Published - Feb 2007 |
| Externally published | Yes |
ASJC Scopus Subject Areas
- Architecture
- Building and Construction
- Arts and Humanities (miscellaneous)
Keywords
- Axial restraint
- Fire resistance
- Flexural-torsional buckling
- Hot-rolled channel column
- Thin-walled channel column