摘要
采用MTS伺服疲劳试验机对C60混凝土试件进行了应变速率分别为1×10-5/s、1×10-4/s、1×10-3/s、1×10-2/s四个量级的单轴动态抗压试验。系统的分析和研究了不同应变速率下,混凝土的抗压强度、弹性模量、峰值应变等力学性能,并且分析了混凝土抗压强度、弹性模量与应变速率之间的关系。试验结构表明:随着应变速率的提高,混凝土的抗压强度和弹性模量均有提高,而峰值应变离散性较大,受应变速率影响不明显。
Dynamic compressive experiments of concrete specimens （C60） are carried out on MTS servo fatigue testing machine with the uniaxial strain rates in the tests were 1 x 10-5/s,1 x 10-4/s.1 10-3/s and 1 x 10-2/s. The compressive properties of concrete under different stain rates, which inelude compressive strength, elastic modulus, and peak strain are analysed and researched systematically, and the formulas which can describe the change law of the compressive strength and elastic modulus of concrete under the different strain rates are proposed. The test results indicate that the compressive strength and elastic modulus of concrete would increase with the strain rate increasing. The discreteness of peak strain is larger, and the effect of strain rate on peak strain is not obvious.
出处
《低温建筑技术》
2013年第5期3-5,共3页
Low Temperature Architecture Technology
关键词
混凝土
应变速率
抗压特性
应力应变曲线
concrete
strain rate
compressive properties
stress-strain curve
