中文摘要：

为明确应变速率对混凝土单轴抗压特性的影响,本文应用MTS试验机对C50混凝土在应变速率为10-5～10-2/s范围内进行了单轴动态抗压试验。系统研究了不同应变速率下混凝土的抗压强度、弹性模量、峰值应变等抗压力学特性,分析了混凝土抗压强度、弹性模量等与应变速率之间的关系。试验结果表明：混凝土抗压强度、弹性模量随着应变速率的增加而增加,峰值应变、泊松比离散性较大,受应变速率的影响不明显。

英文摘要：

In order to investigate the effect of strain rate on concrete uniaxial compressive property,dynamic conpressive experiments of concrete specimens（C50） are carried out on MTS with the uniaxial strain rate ranging from 10-5/s to 10-2/s.The compressive properties of concrete under different stain rates,which include compressive strength,elastic modulus,peak strain and Poisson＇s ratio,are studied systematically.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 compresseive strength and elastic modulus of concrete would increase with the strain rate increasing.The discreteness of peak strain and Poisson＇s ratio are larger,and the effect of strain rate on peak strain and Poisson＇s ratio are not obvious.