The use of structural parts of the buildings as part of the lightning protection systems - the physical damages aspects. / Uso de componentes naturais de edificações como parte integrante do sistema de proteção contra descargas atmosféricas - uma visão relativa aos danos físicos.
AUTOR(ES)
Hélio Eiji Sueta
DATA DE PUBLICAÇÃO
2005
RESUMO
This work presents some specific aspects on the subject lightning protection of structures, mainly when the use of structural parts of the buildings as part of the protection systems is concerned. Several polemical issues are discussed, such as: special air-termination, the dissipation array system and the use of steel-reinforcing rods of the reinforced concrete columns as part of the down-conductor system and of the earth-termination system. Also treated is the main damage that can occur to the buildings due to lightning, mainly when the protection system uses the natural components of the structures, such as: the metallic rooftops and the joints of the steel-reinforcing rods of the reinforced concrete columns. After examining the state-of-the-art in the subject, which analyses several papers, standards and books about lightning characteristics, damage resulting from lightning, shieldings, measurements of electromagnetic fields, distribution of currents and about standardisation and tests related to the protection of structures against lightning, the subject was studied in the three parts that compose the lightning protection systems. In the air-termination system, the damage to metallic rooftops and to pre-stressed concrete rooftop tiles was studied by means of tests and theoretical and mainly experimental analyses. In the down-conductor system, the experimental study focused on the joints of the steel-reinforcing rods and on the use of these as natural down-conductors. Finally, in the earth-termination system, the foundations of the buildings were studied (as part of the grounding) through experimental analyses. This work adds to the current knowledge about the subject several particularities which are not observed in the standards or in the most recent publications concerning the lightning protection systems in buildings that use their natural components for this purpose.
ASSUNTO(S)
electrical tests proteção de estruturas spda lightning descarga atmosférica ensaios elétricos lps flash lightning protection of structures raios
Documentos Relacionados
- Projeto de sistema de proteção de edificações contra descargas atmosféricas assistido por computador
- EMC aspects in strcutures directly struck by lightning.
- Uma contriduição ao estudo da proteção de redes eletricas contra tensões induzidas por descargas atmosfericas
- Previsão de descargas atmosféricas usando o modelo de mesoescala WRF
- Simulação computacional de descargas atmosfericas em estruturas de proteção visando analises de compatibilidade eletromagnetica