Abstract
A numerical program aimed to predict the fire resistant response of concrete-filled SHS ( Square Hollow Section) columns subjected to three-faced fire was compiled. On the basis of the program, parametric analysis of the fire resistance limit of concrete-filled SHS columns was conducted, and 480 hypothetical cases were analyzed for various parameters, including the load ratio, sectional dimensions, slenderness ratio, loading eccentricity, steel and concrete strength, and the area ratio of steel over concrete. Key parameters and their effects were obtained from the simulation results, and a simplified calculation formula for predicting the fire resistance limit was given. The a-nalysis results indicate that the load ratio, sectional dimension and slenderness ratio are main parameters that influ-ence the fire resistance limit of concrete filled SHS columns, and the fire resistance limit increases with the increase of the sectional dimensions and with the decrease of the load ratio and the slenderness ratio. The influence of the loading eccentricity is also obvious when load location trends towards the unexposed side.
| Original language | English |
|---|---|
| Pages (from-to) | 198-203 |
| Number of pages | 6 |
| Journal | Journal of Natural Disasters |
| Volume | 21 |
| Issue number | 3 |
| State | Published - Jun 2012 |
| Externally published | Yes |
Keywords
- Concrete-filled square hollow section
- Fire resistance limit
- Temperature field
- Three-faced fire
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