高温下钢管自密实混凝土界面接触热阻试验研究

发布时间：2018-04-21 21:28

  本文选题：自密实混凝土 + 钢管混凝土　； 参考：《实验力学》2016年05期

【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。
[Abstract]:The interface contact thermal resistance of steel tube and concrete should be considered in the study of the concrete filled steel tube structure. In this paper, the interfacial contact thermal resistance of the self compacting concrete column is tested. 8 self compacting concrete columns are made, and the interface contact of the concrete filled steel tube is obtained according to the Fourier law and the Newton cooling law. The method of solving the thermal resistance is obtained by using the finite element and polynomial fitting extrapolation to get the interface temperature. The change law of the contact thermal resistance of the concrete filled steel tube with the interface temperature of the steel tube is obtained. The experimental results show that the average contact thermal resistance range of the unloaded steel tube self compacting concrete interface is 0.002~ 0.01m2. K/W, compared with the other literature. Reliability.

【作者单位】： 北方工业大学土木工程学院;
【基金】：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
【分类号】：TU398.9
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本文编号：1784163