摘要
混凝土作为最为常见的工程材料之一,准确了解其在单轴压缩状态下的能量存储和耗散规律至关重要。通过对同批次的C30混凝土0.1,03,0.5,0.7和0.9倍峰值强度5个不同卸载水平的单轴压缩加卸载试验,得到混凝土在不同卸载水平下卸载点的总能、弹性能和耗散能以及这3种能量之间的关系。试验结果显示:在单轴压缩下C30混凝土的总能>弹性能>耗散能,且总能、弹性能和耗散能与加载水平呈二次函数关系,耗散能与弹性能呈二次函数关系;卸载点的弹性能与总能呈线性关系,耗散能与总能呈二次函数关系。试验结果也可以用于预测混凝土峰值时的弹性能与耗散能。
As one of the most popular engineering materials,it is essential to accurately understand the energy storage and dissipation laws of concrete in uniaxial compression.Through uniaxial compression and unloading tests on the same batch of C30 concrete at five different unloading levels of 0.1,03,0.5,0.7,and 0.9 times the peak strength,the results were obtained.The test results show that the relationship between total energy,elastic energy and dissipation energy is that total energy>elastic energy>dissipation energy under uniaxial compression.And the relationship between the three kinds of energy and loading level are quadratic functions.The relationship between dissipation energy and elastic energy is quadratic.There is a linear relationship between the elastic energy and the total energy at the unloading point,and a quadratic relationship between the dissipation energy and the total energy.The test results can also be used to predict the elastic energy and dissipation energy of concrete at its peak strength.
作者
王美英
郭腾翔
WANG Meiying;GUO Tengxiang(Zhengzhou University of Industry Technology,Zhengzhou 451150,China;The First Geological and Environmental Investigation Institute of Henan Provincial Bureau of Geology and Mineral Exploration and Development,Zhengzhou 450000,China)
出处
《中国测试》
CAS
北大核心
2022年第6期143-147,共5页
China Measurement & Test
基金
河南省重点科技计划(082102240009)。
关键词
单轴压缩
总能量
弹性能
耗散能
混凝土
uniaxial compression
total energy
elastic energy
dissipation energy
concrete
