摘要
针对建筑工程中混凝土单轴抗压速率特性的尺寸效应问题,利用10 MN大型多功能静动力三轴仪做了混凝土材料在不同尺寸(150、300、450mm立方体)和不同应变速率(10-5、10-4、10-3、10-2/s)下的单调压缩试验,分析了不同应变速率、不同试件尺寸下的混凝土峰值应力、应变等变化规律,并在此基础上,运用数学统计理论建立了考虑尺寸效应的混凝土动态本构模型,对模型中相关参数与应变速率的相关性进行了分析。
Aiming at the dimensional effect of rate characteristics of concrete uniaxial compression during the construction engineering, taking advantage of 10 MN large static and dynamic triaxial apparatus conducts the uniaxial compression test on different size （150, 300, 450 mm cube）and different strain rate （10^-3, 10^-4, 10 ^-3, 10 ^-2/s）. The change laws of concrete peak stress and strain under different strain rates and different specimen sizes are analyzed. Based on mathematical statistics theory, dynamic constitutive model of concrete is established by considering the size effect. The relationship between related parameters in constitutive model and strain rate is analyzed as well.
出处
《水电能源科学》
北大核心
2014年第3期134-137,共4页
Water Resources and Power
关键词
混凝土
尺寸效应
动态特性
本构模型
concrete
size effect
dynamic characteristics
constitutive model
