Research On Fire Characteristics And Test Methods For Rapid Rise Fire

By investigating and researching internal and external fire characteristics of rapid rise fire, developing devices for the rapid rise fire-resistance test and selecting typical fire protection materials for structural elements, such as:fire-resistant coating on indoor thick steel structure, fire-resistance coating for tunnel, and fire-resistance board for tunnel. Related components have been developed According to Requirements of GB14907-2002and GA98-2005; Fire protection materials selected have been constructed and maintained by instructions of the product construction.Through investigation and research on rapid rise fire temperature rise curve, choosing several fire-resistance test temperature rise curves as the temperature rise curve in our test and research. In condition of same fire-resistance test elements and different temperature rise curves, having the fire-resistance test on the components by measuring the internal temperature, then obtaining the fire resistance of the corresponding indicator (Time), and analyzing the relation between fire-resistance of steel components and the section steel perimeter ratio of Hp/A. After having a number of tests, analyzing test data, the conclusions have been drawn as following:1、The fire-resistance of same test components is different as temperature rise curves are different, while other conditions are totally same. The sharper the rise curve, the lower the fire-resistance of test components.2、The fire-resistance of beam is higher than the column, in accordance with the fire-resistance of steel components inversely proportional to section factor, namely, while column Hp/A>beam Hp/A, thus fire-resistance t column <tbeam.3、Whether the formulation of building fire standard, implementation of fire-proofing test methods or the design of building fire-proof, the different fire characteristics should be distinguished at different possible fire locations and corresponding fire-proof design should be done in connection with different fire locations, more importantly, the proper connotation of regulating fire-resistance should be given.4、There is still a large gap between the current situations regulated in the standard of fire-resistance test and factual fire. Therefore, it’s very fundamental and necessary to draw up standards of corresponding fire-resistance test methods according to different fire types, thus to optimize effectively the current standard system.The research project will provide scientific and reliable research verification for design of fire-resistance protection on possible occasions of rapid rise fire (such as hydrocarbon fires), and laid a solid foundation for the drawing up of standard GA714-2007,Simultaneously, also promote more in-depth research in China fire field. Thus. the social benefit and economic benefit created are immeasurable.