Experimental study about the fire effect in short composite column of steel and concrete / Estudo experimental do efeito do fogo em pilares mistos de aço e concreto

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The use of circular hollow steel filled with concrete as columns are of great importance in the structural area, because it allows steel tube and concrete working together, providing a greater capacity resistant and a longer fire exposure, in relation to the same materials analyzed separately. This work will provide technical information for understanding the behaviour of short composite columns submitted to the high temperature effect, which it is analized the loss of the resistant capacity columns, composed of steel tubes filled with conventional concrete, taking into account the effect of fire, and no considering this effect. It presents an experimental study that the composite columns was exposure to high temperatures, with and without load application during the heating, in order to examine the residual capacity resistant after exposure to elevated temperature curves similar the fire standard curve of ISO 834:1994. It was also examined the behaviour of temperature on the outer surface of the steel tube, the interface between the steel and concrete and the temperature in the concrete core composite columns. This way could be found that there was no loss of the resistant capacity of the composite columns after being exposed to the time required 30 minutes and 60 minutes for resistance to fire

ASSUNTO(S)

concreto estruturas metalicas fire protection circular hollow steel-concrete columns high temperature fogo - testes de resistencia composite column construção mista altas temperaturas colunas

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