摘要
为研究西北地区大温差条件下钢管混凝土构件截面的温度场以及钢管与混凝土的脱粘情况,通过模拟一典型地区一月份日平均气温度变化,在大气模拟箱中进行了钢管混凝土构件的温度场和脱粘情况测试。结果表明:在大气温度作用下钢管混凝土构件截面的温度呈非线性分布;钢管的存在会使核心混凝土表面的应力、应变相比素混凝土要大;大气温度降低产生的温差应力大于钢管与混凝土之间的粘结力时也会发生脱粘现象。
In order to study the temperature field of concrete-filled steel tube（CFST） member section and debonding condition of steel tube and concrete in Northwest China with large temperature difference,the tests were conducted in the atmosphere simulation box to simulate the average temperature change in a typical area in January.The results indicate that the temperature of CFSTsection is non-linear distribution under the influence of atmospheric temperature. Because of the existence of steel tube,the stress and strain of core concrete surface will be larger than that of concrete. When the temperature different stress due to atmosphere temperature reduction is greater than the bond stress between the steel tube and concrete,the debonding phenomenon will happen.
出处
《铁道建筑》
北大核心
2017年第5期16-19,共4页
Railway Engineering
基金
国家青年人才托举工程(2015QNRC001)
甘肃省基础研究创新群体(145RJIA332)
兰州交通大学优秀平台资助(201606)
关键词
钢管混凝土构件
温度场
模型试验
西北地区
大温差
Concrete-filled steel tube member
Temperature field
Model test
Northwest China
Large temperature difference
