To explore the attenuation law of blasting stress waves in concrete under different charging structures,the strain values at different positions of the experimental models were tested by a 16-channel dynamic strain gauge based on similarity theory.Meanwhile,the attenuation law of axial and radial blast stress waves in concrete under dif-ferent charge structures was obtained by calculating the peak stress.The results show that the blasting stress wave ex-hibits a power exponential decay as the distance between the blasting centers increases.The initial pressure and max-imum pressure on the borehole wall of the coupled charge structure are the highest,and the detonation wave acts on the medium for a short time.The uncoupled charge structure reduces the initial pressure on the borehole wall and prolongs the time of detonation pressure action.The coupled charging structure consumes much energy in the crush-ing zone,and the energy transfer is uneven.The stress wave attenuation of the uncoupled charging structure during blasting is slow,and the energy transfer is uniform.
关键词
模型试验/混凝土/不同装药结构/爆破应力波/应变
Key words
model experiments/concrete/different charge structures/bursting stress waves/strain
维普
万方数据