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A test system for the influence of wind and fire on building structures

A technology of building structure and test system, which is applied in the testing, instruments, measuring devices of machine/structural components, etc., can solve the problem of not being able to study the temperature and temperature of the surface of the building structure under fire, and achieve the effect of great guiding significance.

Active Publication Date: 2019-09-03
CHONGQING UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is currently no complete test system that can simulate the influence of different ignition point locations, fire magnitudes, and coupling of different wind speeds, wind directions, landforms and other factors on the fire temperature of building structures, that is, the above factors cannot be studied Whether the surface of the lower building structure can reach the rated fire temperature, the time required to reach the rated fire temperature, and the highest achievable fire temperature

Method used

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  • A test system for the influence of wind and fire on building structures
  • A test system for the influence of wind and fire on building structures
  • A test system for the influence of wind and fire on building structures

Examples

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Embodiment 1

[0030] Such as Figure 1~3 , a wind-fire coupling effect on building structure impact test system, comprising a wind tunnel 2 with a built-in building model 1; one end of the wind tunnel 2 is an air inlet, and the other end is an air outlet; the outside of the air inlet is provided with a fan (conventional setting, not shown in the figure), the fan can adjust the wind speed and wind force according to the test requirements, which is a mature prior art, such as the frequency conversion fan can be realized, so it will not be described in detail.

[0031] The air inlet is arranged with a rectifying grid 3 along the radial direction; the rectifying grid 3 can adjust its guiding direction up and down, left and right, and then adjust the wind direction. The specific way for the rectifier grid 3 to adjust the diversion direction can be manual or automatic. For details, refer to the existing air-conditioning diversion grid technology, which is a mature prior art, so it will not be des...

Embodiment 2

[0044] Such as Figure 6 , the difference with Embodiment 1 is that in this embodiment, it also includes a fuel rod 11 vertically arranged between each ignition unit; the fuel rod 11 is filled with sawdust and leaves with a certain humidity, which under the action of flame Smoke will be generated, which really simulates the situation of "smoke and fire" when the fire spreads in the mountains and forests; the interior of the building model 1 is correspondingly equipped with an optical density meter 12 for measuring the smoke concentration, and then reflects the smoke concentration pouring into the room , and analyze its possible impact on indoor personnel.

[0045] Further, in this embodiment, a flue gas characteristic measurement system is also provided inside the structure of the building model 1; the flue gas characteristic measurement system includes O 2 Sensor 14, CO 2 The sensor 15 and the CO sensor 16, on the basis of being able to obtain the smoke concentration, conti...

Embodiment 3

[0049] Such as Figure 7 , the difference from Embodiment 1 is that in this embodiment, there are three first temperature sensors 10 on each layer of the building model 1, and the three first temperature sensors 10 are not arranged in a straight line, but relatively linear. In other words, this arrangement form can simultaneously analyze the temperature distribution law in the x and y directions, that is, if a plurality of first temperature sensors are arranged in a straight line, such as in the x direction, then only the temperature distribution law in the x direction can be reflected.

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Abstract

The invention discloses a system for testing influences on a building structure under a wind and fire coupling effect in the field of wind tunnel testing devices. The system comprises a wind tunnel with a built-in building model. One end of the wind tunnel is provided with an air inlet, and the other end of the wind tunnel is provided with an air outlet. A draught fan is arranged outside the air inlet. Damping screens are distributed on the air inlet in the radial direction. A base is arranged on the lower side of the inner side of the wind tunnel. An ignition testing section is arranged on the side, close to the air inlet, of the base. The ignition testing section comprises a plurality of ignition units arranged in matrix. Each ignition unit comprises an electronic igniter, an electric cylinder, a fuel tank, an ignition nozzle and a fireproof corrugated layer. The building model is arranged between the ignition testing section and the air outlet. A first temperature sensor is arrangedon the outer surface of the side, facing the air inlet, of the building model. The testing system can simulate the influences of the fire temperature on a building mechanism under the coupled conditions of different ignition point positions, different fire behaviors, different wind speeds, wind directions and landforms and other factors.

Description

technical field [0001] The invention belongs to the field of wind tunnel test devices, and in particular relates to a test system for the influence of wind and fire on building structures. Background technique [0002] The fire in the forest or forest spreads rapidly, and a large part of the reason why it is difficult to extinguish it is that the wind direction in the forest or forest area is strong and disordered, which leads to the non-directional spread of the fire. [0003] With the development of the national economy, many real estate buildings, such as tile-roofed houses in rural areas, resort hotels, and private villas, are built around or within the forests. At present, the country is also paying more and more attention to fire protection regulations, and the construction site and building materials of building structures that are built in such unstable wind conditions and are extremely vulnerable to fire threats under the coupling effect of wind and fire are particu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00
Inventor 陈增顺狄谨马虎傅先枝黄海林
Owner CHONGQING UNIV
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