Gas fire source device for building member simulation fire experiment and use method

Abstract

The invention relates to a gas fire source device for a building member simulation fire experiment and a use method. A column member experiment comprises the steps of: fixing a movable bracket, performing safety inspection on a gas distribution device, mounting, connecting and cleaning burners, igniting the burners, setting a use condition 0, performing debugging, putting a column test piece in eight burner middle support areas, opening a main opening-closing valve, igniting all the burners, beginning to record temperature changes of measuring points on the surface of the column test piece, after executing n unit area heat release speed use conditions according to a use scheme, sequentially closing opening-closing valves, closing the main opening-closing valve at last, and stopping recording the temperatures of the measuring points on the surface of the column test piece. A beam member experiment comprises the steps of hanging a beam test piece with a hanging wire over the center of the eight burners in a long side direction of a large rectangle formed by the eight burners, and the procedure of the beam test piece experiment is basically the same as the column test piece experiment. The device can serve for actual requirements of scientific researches and engineering practice such as fire protection design and fire resistance evaluation of a member.

Description

technical field [0001] The invention relates to the field of fire protection of building structures, in particular to a gas fire source device for fire simulation experiments of building components used in the study of temperature rise behavior and fire resistance performance of structural components of industrial and civil buildings under the action of simulated fire and its use method. Background technique [0002] British PD 7974-1:2003 proposes the value of fire load density that can be considered when setting fires in some building places. For example, the average value of office places can be 420MJ / m 2 , and also proposed the value of the heat release rate per unit area that can be considered, for example, 290kW / m2 can be used for office space 2 . [0003] When using "fire load density" as the basis to carry out the simulated fire experiment research of building components, the value provided by the data (in MJ / m 2 ) and the ground area of ​​the building site where t...

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Problems solved by technology

[0012] 3. Although there is a brass mesh or steel mesh pad between the bottom of the gas burner and the intake pipe, it cannot prevent sand from infiltrating into the intake pipe

[0013] 4. The combined use of multiple square burners lacks a design to ensure consistent gas flow from different burners, making it difficult to conduct temperature rise behavior and fire resistance research on building components based on "heat release rate per unit area"

[0014] 5. Whether multiple burners that are adjacent to each other can ensure that they are close to each other has a great impact on the height of the flame, and there is no hardware design consideration for this requirement.

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