Effect of lightning protection methods of external metal components in building on the occupant under direct lightning strike

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Effect of lightning protection methods of external metal components in building on the occupant under direct lightning strike

 

Author: Zhang, Mingsheng
Title: Effect of lightning protection methods of external metal components in building on the occupant under direct lightning strike
Degree: M.Eng.
Year: 2016
Subject: Lightning protection.
Buildings -- Protection.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Building Services Engineering
Pages: 13, 75 pages : color illustrations
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2917136
URI: http://theses.lib.polyu.edu.hk/handle/200/8619
Abstract: Although the lightning protection is relatively mature in modern building design, it still remains a missing part in many buildings. This study aims to expose the character of metal components in building under direct lightning strike. Especially the effect on the occupant by simulating different scenario to study the lightning protection method can be used in building design. To analysis the damage of lightning, a proper model should be introduced to represent the real situation. Then according to the model, FDTD method is used to simulate the situation that the lightning strikes the target building. The scenarios can be divided into 5 kinds, wooden or frame structure, with or without bounding system, with or without grounding system, isolated downlead and isolated lightning rod. Through the simulation result, a conclusion can be made that the grounding system is essential for the metal components. Wooden-structure buildings need more protection for lightning than frame-structure buildings. The bounding system will help to reduce the danger for the occupant, and will perform better if all the metal components are grounded. Isolated downlead and the isolated lightning rod will also help to reduce the danger.

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