Author:
Xia Wei,Xu Jinyu,Nie Liangxue,Wang Zhihang,Huang Zhe,Liu Gaojie
Abstract
Abstract
The dynamic splitting tensile tests of carbon nanofibers reinforced concrete (CNFC) with fiber volume content of 0%, 0.1%, 0.2%, 0.3% and 0.5% were carried out respectively by split Hopkinson pressure bar (SHPB) test device. Based on the internal relationship between the dynamic splitting tensile dissipative energy and the change rate of incident wave energy, the dissipative energy properties of CNFC were analyzed. The results show that: the total energy of incident wave, reflected wave and transmitted wave changes in a similar way with time, which is a cumulative process, with the increase of the change rate of incident wave energy, the dissipative energy of concrete also increases gradually, and the two basically show a linear growth trend; the addition of CNFs has a significant promoting effect on the dissipative energy of concrete, with the increase of the content of CNFs, the enhancement effect of CNFs on the dissipative energy shows a trend of first strengthening and then weakening, with the optimal content of 0.3%.
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