中文摘要：

作为世界上应用最为广泛的建筑材料,混凝土在动态条件下的力学性能明显不同于其在静态情况下力学性能,为了掌握应变速率对混凝土动态抗拉特性的影响,应用MTS液压伺服加载系统,对C35混凝土进行了不同应变速率下的单轴动态拉伸试验,系统分析了应变速率对混凝土力学特性的影响,包括抗拉强度、弹性模量、峰值应变等。试验结果表明：应变速率对混凝土的抗拉特性具有显著的影响,混凝土抗拉强度、弹性模量随着应变速率的增加而增加,泊松比数据的离散性较大,应变速率对其影响趋势不明显。这些成果有利于进一步掌握混凝土的动态抗拉特性。

英文摘要：

As one of the most widely used construction material throughout the world,the mechanical properties of concrete under dynamic loads differ from that under static loads greatly.In order to grasp the effect of sWain rates on the dynamic tensile properties of concrete, dynamic tensile tests of concrete specimens （C35） are carded out on MTS under different sWain rates.The effect of stain rates on the tensile properties of concrete,which include tensile strength, elastic modulus and peak sWain, was analyzed systematically.The test results indicate that the strain rates have a significant effect on the tensile properties of concrete.The tensile strength, elastic modulus and peak strain would increase with the sWain rate increasing.The discreteness of Poisson＇s ratio is larger.The effect of the strain rates on Poisson＇s ratio is not obvious.These achievements can contribute to grasp the dynamic tensile properties of concrete.