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Analytical modelling of the mechanical damage of soil induced by lightning strikes capturing electro-thermal,thermo-osmotic,and electro-osmotic effects

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Journal of Mountain Science 2022年第7期19卷 2027-2043页

作者： RAO Ping-ping OUYANG Pei-hao NIMBALKAR Sanjay CHEN Qing-sheng WU Zhi-lin CUI Ji-fei Department of Civil Engineering University of Shanghai for Science and TechnologyShanghai200093China School of Civil and Environmental Engineering University of Technology Sydney15 BroadwayUltimoNSW2007Australia Technology Research Center of Ecological Road Engineering Hubei University of TechnologyWuhan430068China

This article presents a mathematical model for simulating the mechanical behaviour of lightning strikes and analysing the resulting damage to the *** article focuses on the electro-thermal effect and seepage caused by lightning strikes in ***,a numerical model based on the conservation laws of momentum,mass and energy is developed for soil subjected to lightning *** to field observations and theoretical calculations are used to demonstrate the efficacy and accuracy of numerical *** findings demonstrate that lightning strikes can cause soils to experience both seepage force and heat *** the calculative condition of this article:by increasing the intrinsic permeability of the soil,k_(p)(≥10^(-10)m^(2)),the seepage force can be effectively reduced,hence reducing the risk of lightning strikes;improving the electrical conductivity of the soil β(≥10^(-1) S/m^(2))and lowering its thermal expansion coefficient(≤10^(-6)K^(-1))can greatly reduce the damage caused by lightning strikes to the *** preceding investigations demonstrate that the suggested model is capable of evaluating mechanical damage caused by lightning in the soil,and the findings contribute to a better understanding of soil mechanical response to lightning strikes.

关键词： Lightning strikes Analytical modelling soil damage Electro-thermo-osmotic effect Conservation laws

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