Numerical study on temperature distribution of high-strength concrete-filled steel tubes subjected to a fire
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- 作者：Ying Hu ; Pengfei Zhao ; Bo Yang ; Guoxin Dai
- 关键词：concrete ; filled steel tube column ; water ; to ; cement ratio ; contact conductance ; numerical model ; fire
- 刊名：International Journal of Steel Structures
- 出版年：2016
- 出版时间：December 2016
- 年：2016
- 卷：16
- 期：4
- 页码：1057-1069
- 全文大小：
- 刊物类别：Engineering
- 刊物主题：Civil Engineering; Structural Mechanics; Materials Science, general;
- 出版者：Korean Society of Steel Construction
- ISSN：2093-6311
- 卷排序：16
文摘
High-strength concrete-filled steel tube (CFST) columns offer a number of benefits and are widely used in high-rise building construction. This paper presents a brand new thermal modeling approach in comparison with tremendous test data for the heat transfer analysis. A heat transfer model has been developed to predict the thermal response of high-strength CFST columns under standard fire conditions with consideration of a number of parameters: steel and furnace emissivity, thermal interface conductance and concrete strength. The verified numerical models discussed the variation of emissivity of steel surfaces and thermal interface conductance in fire. It can be concluded that the influence of emissivity and thermal interface conductance is considerable in the numerical analysis. It is also demonstrated that thermal behavior of high-strength CFST columns subjected to fire during heating and cooling stages, and providing the guidance on predicting thermal response of high-strength concrete-filled steel tube columns.