Investigate on shock acceleration of concrete at depths of burst

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (3) : 1-6.

MU Chao-min1, 2, 3, REN Huiqi4，SHI Biming1

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Abstract

In order to investigate acceleration of concrete at different scaling depths burst (SDOB), the empirical formulate of impact acceleration are deduced by using combination of free field experiment and dimensional analysis that is inducted by DOB coefficient of equivalent yield. The results show that when SDOB is form 0.25 m/kg1/3 to 1.0m/kg1/3, impact acceleration of C30 concrete under blasting point increase with SDOB, but attenuation of shock acceleration of concrete are in agreement at different SDOB. Towards different concrete strength, impact acceleration increase with concrete strength enhancing, and attenuation of acceleration is in concert. The obtained empirical formulate of C30 concrete have high degree of accuracy to predict shock acceleration laws.

Key words

explosion mechanics；concrete；dimensional analysis；acceleration / depths of burst(DOB) coefficient of equivalent yield

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MU Chao-min1, 2, 3, REN Huiqi4，SHI Biming1. Investigate on shock acceleration of concrete at depths of burst[J]. Journal of Vibration and Shock, 2016, 35(3): 1-6

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