高压脉冲放电破碎混凝土梁试验

doi:10.13229/j.cnki.jdxbgxb20210687

Abstract

Abstract:

The crushing tests of 15 reinforced concrete beams were carried out by high-voltage pulse discharge（HVPD） in liquid. Based on the comparative analysis of the electrohydraulic effect and the copper wire explosion in liquid on the crushing test of concrete beams， the latter is determined as the optimal scheme. The parameters in the test include strength of concrete， borehole aperture， hole spacing， HVPD voltage and number of copper wires. The results show that the breaking effect of concrete beam increases obviously with the increase of discharge voltage and the number of copper wires， and slightly with the decrease of concrete strength. In the case of all the other parameters being equal， the concrete beam with a hole diameter of 40 mm is better than the concrete beam with a hole diameter of 50 mm. And the concrete beam with drilling spacing of 300 mm has a better crushing effect than the concrete beam with drilling spacing of 400 mm. According to the test results， a mathematical expression was established between the failure degree of concrete beam （i.e.， the crack width of concrete at beam side） and the output voltage， the number of copper wires discharged， the strength of concrete and other key parameters.

Key words: structural engineering, high-voltage pulse, copper wire explosion, concrete beam, crush, crack

CLC Number:

TU375

Xiao-dong WANG,Ning-jing LI,Qiang LI. Experimental on crushing of concrete beams by high⁃voltage pulse discharge[J].Journal of Jilin University(Engineering and Technology Edition), 2023, 53(2): 496-504.

Figures/Tables 14

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钢筋种类	μf_y/ （N·mm^-2）	μf_u/ （N·mm^-2）	μE_s/ （10⁵N·mm^-2）
?6	336.7	523.3	2.18
?8	331.9	510.6	2.23
?12	376.4	563.1	2.12
?14	412.1	564.3	2.22

Experimental on crushing of concrete beams by high⁃voltage pulse discharge

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