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本文对边长为300mm的C30立方体进行了静态回弹测试,并进行了10~(-5)/s、5×10~(-5)/s、10~(-4)/s、10~(-3)/s、5×10~(-3)/s五种不同应变速率下的压缩试验。结果表明:混凝土的抗压强度与静态回弹值之比与应变速率之间呈现明显的线性相关性;混凝土的弹性模量随加载速率的增加呈线性增加的趋势;混凝土峰值应变随着加载速率的增加总体呈降低的趋势。
In this paper, a static rebound test was carried out on a C30 cube with a side length of 300 mm. The test was carried out with 10 -5 / s, 5 × 10 -5 / s, 10 -4 / s, (-3) / s, 5 × 10 -3 / s at five different strain rates. The results show that there is a clear linear correlation between the compressive strength of concrete and the static rebound value and the strain rate. The elastic modulus of concrete shows a linear increase with the increase of loading rate. The peak strain of concrete increases with the increase of loading rate The overall increase is decreasing trend.