Abstract
Impact experiments for the commonly used kinds of concrete in engineering, such as C30, C50 and C60 and C70, are performed on split Hopkinson pressure bar(SHPB) equipment with a large diameter of Φ75 mm and high temperature heat test system under different temperature conditions (room temperature, 150 ℃, 300 ℃, 450 ℃, 600 ℃). The results showed that the four kinds of strength grade of concrete are showed obvious temperature effect, with the increase of temperature, decrease of dynamic damage of concrete strength, the dynamic failure strain increasing; When the temperature reached 600 ℃, the dynamic fracture strength and concrete strength grade is less; At the same time, the four kinds of strength of concrete at high temperature have the phenomenon of plastic flow and this phenomenon is more and more obvious and toughness is more and more strong with the increasing of temperature.
Key words
Φ75mm SHPB /
concrete /
high temperature /
dynamic mechanics performance
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Wang Yu-Tao;Liu Dian-Shu;Li Sheng-Lin;Jiang Ya-Qin.
Study the dynamic mechanical property of concrete based on Φ75mm SHPB system under high temperature conditions[J]. Journal of Vibration and Shock, 2014, 33(17): 12-17
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