Device and method for testing real fire of compression member

Abstract

The invention discloses a device and a method for testing a real fire of a compression member. The device comprises a fire source simulation device, a compression member loading device and a data acquisition device. The compression member loading device comprises a lower cross beam of which two ends are respectively connected with a first lower side cross beam and a second lower side cross beam and an upper cross beam of which two ends are respectively connected with a first upper side cross beam and a second upper side cross beam; the two ends of the first upper side beam and the first lowerside beam are screwed to upper and lower ends of a first screw rod and a second screw rod and the middle parts of the first upper side cross beam and the first lower side cross beam are in threaded connection with the upper and lower ends of a third screw rod; two ends of the second upper side cross beam and a second lower side cross beam are screwed with upper and lower ends of fourth and fifth screw rods, and the middle parts of the second upper side cross beam and the second lower side cross beam are screwed with upper and lower ends of a sixth screw rod; a screwing nut is arranged on eachscrew rod at the screw joint, and a pressure sensor is selectively arranged between the nut and the first and second upper side edge cross beams; a pressed test piece to be tested is vertically clamped between the lower cross beam and the upper cross beam; and a fire source of a fire source simulation device is arranged below the lower cross beam.

Description

technical field [0001] The invention belongs to the technical field of fire test devices, and in particular relates to a real fire test device of a pressure-receiving member and a test method using the test device. Background technique [0002] Fire is one of the most frequent and devastating disasters, and its frequency ranks first among all disasters. Fires such as the Jiaozhou Road apartment fire in Shanghai, the Grenfell Tower apartment fire in London, and Notre Dame de Paris fire caused heavy casualties and economic and cultural losses to people. Therefore, the fire safety of engineering structures is an important aspect of structural safety. At present, the main experimental research on structural behavior under fire is to use a fire test furnace, which is a closed space. The heating curve in the furnace is controlled by controlling the amount of gas in the closed space, the pressure in the furnace, and the air in the furnace to simulate the effect of fire. The furna...

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Problems solved by technology

However, the standard fire test furnace can only simulate the behavior of the components after the indoor fire flashover, and can only simulate the physical behavior of the components during the heating process of the fire, and the components are basically in a uniform fire state

However, the development of an actual building fire is a very complicated process. The initial stage of a real fire is a local fire at the ignition point. For compressed components such as columns and walls, the smoke temperature distribution around the components is uneven, mainly due to local flame radiation. Function; when the combustibles in the room are burned out, the fire will enter the decay stage, and the behavior of the components under the real fire is quite different from the physical behavior measured by the standard test furnace

Due to the high construction cost of the test furnace, there are many restrictions on the use conditions

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