Abstract
Using pulse power technology to break concrete structures can reduce environmental pollution, save energy, and increase safety and reliability. The whole process of concrete beam subjected to shock wave generated by pulse power discharge was simulated and analyzed. An experiment of breaking reinforced concrete beams by metal wire explosion in liquid was carried out. And the main parameters are pulse power discharge voltage, copper wires section size, concrete beam material strength, drilling parameters, etc. The results show that with the increase of discharge voltage and the total area of copper wire cross section between electrodes, the breaking effect of concrete beam is obviously improved. The breaking effect of the beam is slightly improved when the concrete strength is reduced. The breaking effect of concrete beams with 40 mm aperture is better than that of concrete beams with 50 mm aperture. As the distance between adjacent boreholes decreases, the fractures are easier to connect. According to the test results, the formulas for calculating the crack width of concrete beams were proposed, which takes the output voltage, the number of copper wires between electrodes, the hole spacing, the strength of concrete and other key parameters as independent variables. The calculated results agree well with the test results.
Highlights
Pulse power is an electrophysical technology that rapidly compresses, converts or directly releases energy stored slowly with high density to the load [1]
Yudin [16] carried out crushing tests of reinforced concrete blocks by high-voltage pulse discharge, and used computer simulation to simulate the effect of shock waves generated by pulse discharge on reinforced concrete blocks
11c, the crack width of the C20 con13crete beam is 15 mm when the discharg13e voltage is above 60 kV, indicating that when the12 number of copper wires is 60, the disc12harge voltage of 60 kV can peel the concrete prote11ctive layer from the concrete beam
Summary
Pulse power is an electrophysical technology that rapidly compresses, converts or directly releases energy stored slowly with high density to the load [1]. Yudin [16] carried out crushing tests of reinforced concrete blocks by high-voltage pulse discharge, and used computer simulation to simulate the effect of shock waves generated by pulse discharge on reinforced concrete blocks. Uenishi [17] of the University of Tokyo, Japan, conducted a dynamic crushing test of concrete materials caused by high-voltage pulse discharge. Since it is not easy to break down the water gap, this process consumes a lot of energy, and the development of the discharge channel is uncontrollable, making it difficult to achieve long-gap breakdown [22] This method has high requirements on peak current and current waveform steepness, and discharge failure often occurs, and there is a hidden danger of current reverse short-circuit damage to the equipment. This paper selects the wire explosion method as the pulse power discharge method for research
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
