混凝土材料骨料效应SHPB实验研究

SHPB Experimental Study on Aggregate Effect of Concrete Materials

在混凝土的动态性能测试时,通常存在各种动力学效应,比如:轴向和侧向惯性约束效应,应力波传播的影响和最终摩擦效应以及骨料效应(骨料大小)等,这些效应常常作为材料本身的性质,进入了最后的测试结果,为实验带来了不必要的误差甚至错误。本文针对骨料效应进行了SHPB试验研究,研究了骨料对动态放大因子的影响(DIF),相关研究成果可以为工程实验提供参考。

In the dynamic performance test of the concrete, usual- ly there are various dynamic effects such as axial and lateral iner- tial confinement effect,effect of stress wave propagation and end friction effect and the aggregate effect （aggregate size ）. The effect are often as the nature of the material itself which have en- tered the final test results. It will make errors of test which caused by unnecessary or even wrong. In this paper, the aggregate effect is studied by SHPB experiment, and the influence of aggre- gate on dynamic magnification factor is determined by numerical simulation （DIF）. The research can provide reference value for engineering test.