| 张宏涛*,高明旭,于媛福.高温下钢管自密实混凝土界面接触热阻试验研究[J].实验力学,2016,31(5):584~592 |
| 高温下钢管自密实混凝土界面接触热阻试验研究 |
| Experimental Study of Thermal Contact Resistance on the Interface between Steel Tube and Self-Compacting Concrete at High Temperature |
| 投稿时间：2015-10-21 修订日期：2016-03-18 |
| DOI：10.7520/1001-4888-15-196 |
| 中文关键词: 自密实混凝土 钢管混凝土 界面接触热阻 高温 热物理参数 |
| 英文关键词:self-compacting concrete concrete filled steel tube thermal contact resistance high temperature thermal physical parameter |
| 基金项目:北京市自然科学基金-北京市教育委员会科技计划重点项目(KZ201310009010)，北方工业大学人才强校行动计划-长城学者后备人才 |
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| 中文摘要: |
| 钢管混凝土结构的火灾性能研究通常要考虑钢管和混凝土的界面接触热阻问题，本文对钢管自密实混凝土柱的界面接触热阻进行了试验研究。制作了8个钢管自密实混凝土柱，依据Fourier定律和Newton冷却定律得到了钢管混凝土界面接触热阻的求解方法。利用有限元和多项式拟合外推得到界面温度，得出钢管混凝土接触热阻随着钢管界面温度的变化规律。试验结果表明，未受载的钢管自密实混凝土界面接触热阻平均值范围在0.002~0.01m2·K/W，与其他文献结果相比有一定可靠性。 |
| 英文摘要: |
| Interface thermal contact resistance between steel and concrete is usually has to be considered when the interface fire behavior of steel tube and concrete structure is studied. Experimental study of thermal contact resistance of self-compacting concrete filled steel tube (SCCFST) was carried out, its results are presented in this paper. Eight self-compacting concrete filled steel tube columns were prepared for experiment. According to Fourier's law and Newton's cooling law, the solution method for thermal contact resistance of steel tube and concrete interface was constructed. By using finite element method and polynomial fitting, the interface temperature was obtained through extrapolation. The variation of steel-concrete thermal contact resistance with the steel tube interface temperature was also obtained. Experimental results show that the average value of thermal contact resistance of unloaded SCCFST is in a range from 0.002 to 0.01m2·K/W, compared with other literature, which has a certain reliability degree. |
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