Электротермическое воздействие импульса тока искусственной молнии на пожароустойчивость покрытия наружной кровли из нержавеющей стали

Abstract

The results of numerical and experimental assessment of the electro-thermal resistance of thin-walled covering of an exterior roof of high-rise constructions of stainless steel to the direct influence of the impulse of current of artificial lightning. It is shown that the specified impulse lightning current causes a local surface thermal damage of the investigated steel coating when the radius of the damage zone, not more than 30 mm and the depth of penetration of its wall of not more than 50 microns., that can produce a fire insulating materials