自密实钢管混凝土合理膨胀剂参量研究  

The Research of Reasonable Expansion Agent Dosage of Self-Compacting Concrete Filled Steel Tube

作　　者：尚茂 曹新明 刘骁凡 程阿青 涂开胜 丁新东 黄兴佳 

机构地区：[1]贵州大学土木工程学院,贵州 贵阳 [2]贵州省公路工程集团有限公司,贵州 贵阳

出　　处：《土木工程》2019年第8期1313-1322,共10页Hans Journal of Civil Engineering

摘　　要：本文分别进行了4根管径为219 mm和4根管径为273 mm、壁厚为8 mm的钢管混凝土轴心抗压试验,其核心混凝土膨胀剂参量分别为0%、5%、7%、9%。并通过有限元对核心混凝土膨胀剂参量分别为0%、5%、7%、9%,管径为219、273、350、400,壁厚为8的钢管混凝土进行分析。结果显示,膨胀剂参量为5%、7%时,钢管混凝土的承载力分别提高53.0%、44.5%;膨胀剂参量为9%时,钢管混凝土承载力反而有所降低。因此膨胀参量应控制在5%~7%较为合理。In this paper, the axial compression test of concrete filled steel tube with 4 pipe diameters of 219 mm and 4 pipe diameters of 273 mm and wall thickness of 8 mm was conducted respectively, which the core concrete expansion agent parameters are 0%, 5%, 7% and 9% respectively. And the finite element model was used to analyze the core concrete expansion agent parameters of 0%, 5%, 7%, 9%, and pipe diameters of 219, 273, 350, 400 and wall thickness of 8. The results show that when the expansion agent parameters are 5% and 7%, the bearing capacity of the concrete-filled steel tube is increased by 53.0% and 44.5%, respectively. When the expansion agent parameter is 9%, the bearing capacity of the concrete-filled steel tube is reduced. Therefore, the reasonable expansion parameters should be controlled at 5% to 7%.

关 键 词：膨胀剂 自密实钢管混凝土 轴心抗压承载力试验 有限元分析 

分 类 号：TU5[建筑科学—建筑技术科学]