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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。
The strain rate of C60 concrete specimens was 1 × 10-5 / s, 1 × 10-4 / s, 1 × 10-3 / s and 1 × 10-2 / s respectively by MTS servo fatigue testing machine. The magnitude of uniaxial dynamic compression test. The mechanical properties such as compressive strength, elastic modulus and peak strain of concrete under different strain rates were systematically analyzed and analyzed. The relationship between compressive strength, elastic modulus and strain rate was also analyzed. The experimental results show that with the increase of strain rate, the compressive strength and elastic modulus of concrete all increase, but the peak strain is more discrete and the influence of strain rate is not obvious.