摘要
隧道火灾的高温作用对混凝土的性能有很大影响。基于ISO834标准,对不同高温(100℃~700℃)后的20个混凝土立方体试件进行了抗压强度试验,拟合了高温作用后混凝土抗压强度与温度及静置时间之间的耦合关系公式,并利用扫描电子显微镜(SEM)对试验后的混凝土试件的内部组织进行了微观分析,获得了混凝土抗压强度随温度升高而逐渐下降的等试验结论。其试验结果可为分析和研究混凝土在不同温度、不同冷却方式、不同静置时间作用下的材性变化情况提供一些依据。
The properties of concrete are greatly influenced by tunnel fire.Therefore,based on ISO834 fire curve,compressive experiments were conducted to study the compressive strength variations with increasing temperatures up to 700 ℃,and the formula which shows the coupling correlation between compressive strength and temperature variation based on standing time was established.Then microstructural observations of the concrete specimens by means of scanning electron microscopy(SEM) were obtained.Results showed tha...
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2008年第5期74-78,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金重大资助项目(50490272)
关键词
隧道火灾
升温曲线
混凝土
抗压强度
tunnel fire
fire curve
concrete
compressive strength
