摘要
为了得到高温下耐火钢的材料特性,对马钢集团开发的耐火钢在高温下的力学性能进行了试验研究。通过高温下的恒温加载拉伸试验,得到不同温度下耐火钢的屈服强度、极限强度、延伸率、面缩率和应力-应变关系,并测定高温下耐火钢的热膨胀系数,采用悬丝耦合共振法测定高温下耐火钢的初始弹性模量。试验表明,马钢耐火钢在600℃时的屈服强度大于常温下的2/3,弹性模量大于常温下的3/4。通过对试验结果的分析,拟合得到耐火钢的各力学指标参数随温度变化的计算公式,这些公式可用于耐火钢结构抗火性能的分析与设计。
Experiments are carried out to determine the high-temperature mechanical properties, such as yield strength, tensile strength, elongation, Poisson ratio and stress-strain relationship, of fire-resistant steel made by the Maanshan Iron ＆ Steel Co. Ltd.. A coupled vibration method on suspended free poles is employed to determine the initial Young＇s modulus at elevated temperatures, also the thermal expansion coefficients of fire-resistant steel. Test results indicate that the yield strength of fire-resistant steel at 600℃ is higher than the yield strength at ambient temperature by two thirds, and the initial Young＇s Modulus at 600℃ is higher than of that at ambient temperature by three quarters. In conclusion, the functions of coefficients for mechanical properties of fire-resistant steel under variable temperatures are developed by using a regression analysis.
出处
《土木工程学报》
EI
CSCD
北大核心
2006年第8期72-75,共4页
China Civil Engineering Journal
基金
国家自然科学基金(50308019)
关键词
高温
试验
力学性能
耐火钢
high-temperature
experiment
mechanical property
fire-resistant steel
