Arc Energy Estimations: Applications in Lightning-Induced Concrete Spall

Tully, L K ; Ong, M M

关键词: BREAKDOWN;    CONCRETES;    DIELECTRIC MATERIALS;    ELECTRIC FIELDS;    ENERGY LOSSES;    LAUNCHING;    LIGHTNING;   

DOI  :  10.2172/945626
RP-ID  :  LLNL-TR-404460
PID  :  OSTI ID: 945626
Others  :  TRN: US200904%%112

学科分类：工程和技术（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

After lightning contacts a building, the possibility of a physical break in its conductive path to ground may exist. Given such a break, an electric field may develop across the gap until it exceeds the breakdown strength of the non-conducting, or dielectric, material. Breakdown subsequently occurs and energy is dissipated during the development of an arc channel. If the dielectric is concrete, a concern exists that the energy available for arc formation may be capable of launching pieces of spall into sensitive equipment. This paper discusses the mechanisms of energy dissipation in arc formation and quantifies the energy available for concrete spall.