CN110595812B - Experimental device and experimental method for simulating bridge under fire and load - Google Patents
Experimental device and experimental method for simulating bridge under fire and load Download PDFInfo
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- CN110595812B CN110595812B CN201910861192.8A CN201910861192A CN110595812B CN 110595812 B CN110595812 B CN 110595812B CN 201910861192 A CN201910861192 A CN 201910861192A CN 110595812 B CN110595812 B CN 110595812B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention belongs to the technical field of bridge fire-receiving experimental devices, and relates to an experimental device and method for simulating bridge fire-receiving load, wherein the experimental device comprises: loading device and simulation are fired the device, and its simple structure is uncomplicated, can independently realize that the bridge bears the load, and the bridge bears the experimental simulation of conflagration, more can simulate the bridge and bear the load and receive the experimental condition of fire simultaneously. The fire-resistant furnace is connected with the longitudinal floor sliding groove through the electric roller of the fire-resistant furnace, and plays a role in simulating fire instead of supporting the bridge, so that the fire of the bridge at different positions can be simulated by moving the fire-resistant furnace; the crossbeam reaction frame is connected in the track channel-section steel through electronic gyro wheel, realizes the loaded simulation of the bridge of different positions through the removal crossbeam reaction frame.
Description
Technical Field
The invention belongs to the technical field of bridge fire-bearing experimental devices, and relates to an experimental device and an experimental method for simulating bridge fire-bearing load.
Background
Although the probability of a fire occurring on a highway bridge is not great, there are many bridges that will encounter an unexpected fire every year. When a bridge is in a fire, the physical and chemical properties of the building materials can be changed, the original constitutive relation can be generated, the bearing capacity of the bridge is seriously influenced, and then the urban traffic and other problems are influenced.
Based on the above situation, the research on the mechanical properties of the bridge in the fire state is not slow. Therefore, related scientific researchers naturally think that simulation of bridge fire is carried out through a laboratory, and then mechanical property changes of the bridge in a fire state are researched. However, the prior art is more fire experiment devices for building structures, and no bridge fire laboratory for the above situations exists.
The fire experiment device of the current building structure is mainly used for simulating the fire on walls and columns, and the fire mode can not be applied to the accurate simulation of the fire on bridges. Therefore, it is necessary to design an experimental device and an experimental method for bridge fire load to accurately simulate bridge fire.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an experimental device and an experimental method for simulating the bridge under the condition of fire load.
In order to achieve the purpose, the invention provides the following technical scheme:
in one aspect, the invention provides an experimental device for simulating bridge fire load, comprising: a loading device and a simulation fire-receiving device,
the loading device comprises fixed supports symmetrically distributed on two sides of the simulated fire receiving device, a plurality of beam reaction frames are mounted between the fixed supports on the two sides of the simulated fire receiving device, the upper and lower surfaces of two ends of each beam reaction frame are abutted with reserved openings in the track channel steel through electric rollers, and the electric rollers are connected with the remote control device; the lower surface of each beam reaction frame is provided with a pulley notch, a pulley is installed in each pulley notch, and the jack is connected with the beam reaction frame through the pulley notch and the pulley;
the simulated fire receiving device comprises a fire-resistant furnace, a longitudinal floor sliding chute, a transverse floor sliding chute and a plurality of movable supports; the fire-resistant furnace and the movable support are respectively connected with the longitudinal floor sliding groove in a sliding manner, and the fire-resistant furnace and the movable support move along the longitudinal floor sliding groove under the control of the remote control device;
the upper part of the interior of the fire-resistant furnace is provided with a smoke exhaust pipeline, combustion nozzles are uniformly distributed on the furnace wall of the fire-resistant furnace, the outer sides of the combustion nozzles are connected with a fuel pipeline, and the fuel pipeline is provided with an adjusting valve which is connected with computer control equipment.
Further, the fixed bolster includes unable adjustment base, stand, track channel-section steel, unable adjustment base fixed mounting is subaerial, the column mouting is in unable adjustment base's top, the track channel-section steel is installed in the top of stand.
Further, unable adjustment base passes through base bolt fixed connection subaerial, stand and unable adjustment base welded fastening, the track channel-section steel passes through track channel-section steel bolt and stand fixed connection.
Furthermore, unable adjustment base, stand, track channel-section steel and crossbeam reaction frame all adopt high-strength steel material to make.
Furthermore, the bottom of the fire-resistant furnace is provided with a fire-resistant furnace electric roller, the bottom of the movable support is provided with a movable support electric roller, and the fire-resistant furnace electric roller and the movable support electric roller are both connected with a remote control device.
Further, the electric rollers of the fire-resistant furnace are positioned at four corners of the bottom of the fire-resistant furnace.
Furthermore, the number of the movable supports is multiple, and the plurality of the movable supports are respectively positioned on two sides of the refractory furnace.
Furthermore, the remote control device is a wireless remote controller, and the mobile support and the refractory furnace are controlled by the wireless remote controller to move in the longitudinal floor sliding groove.
Furthermore, the fire-resistant furnace is an open cuboid, the furnace body of the fire-resistant furnace is made of high-temperature-resistant materials, and the furnace wall of the fire-resistant furnace is composed of light heat-insulating bricks with the thickness of 10mm and light fire-resistant ceramic fibers with the thickness of 400 mm.
On the other hand, the invention also provides an experimental method for simulating the bridge fire load, which utilizes the experimental device for simulating the bridge fire load, and comprises the following specific steps:
1) according to the span of the test bridge and the experimental requirements, the distance relationship between the movable support and the refractory furnace is controlled by using a remote control device so as to meet the experimental requirements;
2) hoisting the test beam by using a hoisting device and lowering the test beam to the movable support;
3) moving the simulation bridge fire receiving device to the lower part of the loading device by using the remote control device;
4) according to the requirement of the loading position, the cross beam reaction frame is moved to the corresponding position through the remote control device, and then the jack is moved to the corresponding position;
5) controlling the regulating valve by using computer equipment to control the opening and closing of the combustion nozzle;
6) starting a combustion nozzle in the refractory furnace, and simulating a bridge fire experiment;
7) opening a smoke exhaust pipeline, and performing smoke exhaust measures in a bridge fire experiment;
8) and connecting the jack to external equipment to load the test beam.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the experimental device controls the movable support and the refractory furnace to move in the longitudinal floor sliding groove through the remote control device, and can realize experimental simulation of the bridge fire-receiving load states of different parts through moving the simulation fire-receiving device; through the design to loading device and simulation device of being fired, can independently realize that the bridge bears the load, the experimental simulation that the bridge bore the conflagration can also simulate the bridge and bear the load and receive the experimental state of being fired simultaneously.
Drawings
FIG. 1 is a schematic perspective view of an experimental apparatus for simulating a bridge under fire and load according to the present invention;
FIG. 2 is a side view of a simulated fire receiver provided in accordance with the present invention;
FIG. 3 is a schematic cross-sectional view of a refractory furnace provided in accordance with the present invention;
FIG. 4 is a side view of a loading device provided by the present invention;
fig. 5 is a schematic cross-sectional structure diagram of a loading device provided by the present invention.
Wherein: 1 is a fixed base; 2 is a base bolt; 3 is a column; 4, a track channel steel bolt; 5 is a beam reaction frame; 6 is a jack; 7 is a track channel steel; 8 is a reserved opening; 9 is a refractory furnace; 10 is a longitudinal floor chute; 11 is a transverse floor chute; 12 is a smoke exhaust pipeline; 13 is a fuel pipeline; 14 is a refractory furnace electric roller; 15 is a movable support electric roller; 16 is a regulating valve; 17 is a combustion nozzle; 18 is an electric roller; and 19 is a movable support.
Detailed Description
The invention is described in further detail below with reference to the following figures and examples:
example 1:
referring to fig. 1-5, the invention provides an experimental device for simulating a bridge under fire load, comprising: a loading device and a simulation fire-receiving device,
the loading device comprises fixed supports symmetrically distributed on two sides of the simulated fire receiving device, a plurality of beam reaction frames 5 are arranged between the fixed supports on the two sides of the simulated fire receiving device, the upper and lower surfaces of two ends of each beam reaction frame 5 are abutted with the reserved openings 8 on the track channel steel 7 through electric rollers 18, and the electric rollers 18 are connected with the wireless remote control device; the lower surface of each beam reaction frame 5 is provided with a pulley notch, a pulley is installed in the pulley notch, and the jack 6 is connected with the beam reaction frame 5 through the pulley notch and the pulley;
the simulated fire receiving device comprises a fire-resistant furnace 9, a longitudinal floor chute 10, a transverse floor chute 11 and a plurality of movable supports 19; the fire-resistant furnace 9 and the movable support 19 are respectively connected with the longitudinal floor sliding chute 10 in a sliding way, and the fire-resistant furnace 9 and the movable support 19 move along the longitudinal floor sliding chute 10 under the control of a remote control device;
a smoke exhaust pipeline 12 is arranged above the inside of the fire-resistant furnace 9, combustion nozzles 17 are uniformly distributed on the furnace wall of the fire-resistant furnace 9, the outer sides of the combustion nozzles 17 are connected with a fuel pipeline 13, an adjusting valve 16 is arranged on the fuel pipeline 13, and the adjusting valve 16 is connected with computer control equipment.
Further, the fixed bolster includes unable adjustment base 1, stand 3, track channel-section steel 7, and unable adjustment base 1 fixed mounting is subaerial, and stand 3 installs in unable adjustment base 1's top, and track channel-section steel 7 installs in stand 3's top.
Preferably, unable adjustment base 1 passes through base bolt 2 fixed connection subaerial, and stand 3 and unable adjustment base 1 welded fastening, track channel-section steel 7 pass through track channel-section steel bolt 4 and stand 3 fixed connection.
Further, the fixed base 1, the upright post 3, the track channel steel 7 and the cross beam reaction frame 5 are all made of high-strength steel materials.
Furthermore, the bottom of the fire-resistant furnace 9 is provided with a fire-resistant furnace electric roller 14, the bottom of the movable support 19 is provided with a movable support electric roller 15, the fire-resistant furnace electric roller 14 and the movable support electric roller 15 are both connected with a remote control device, and the remote control device can control the fire-resistant furnace 9 and the movable support 19 to move along the longitudinal floor sliding groove 10, so that experimental simulation of the fire-receiving state of bridges at different positions is realized.
Preferably, the refractory furnace electric rollers 14 are respectively arranged at four corners of the bottom of the refractory furnace 9, and the remote control device is a wireless remote controller.
Further, the number of the movable supports 19 is plural, and the plural movable supports 19 are respectively located on both sides of the refractory furnace 9.
Optionally, the number of the movable supports 19 is two, and the two movable supports 19 are respectively located at two sides of the refractory furnace 9; the number of the movable supports and the number of the refractory furnaces can be adjusted according to the test requirements of bridges of different systems.
Further, the computer device is used for controlling the regulating valve 16, and the computer device is also connected with input and output devices, a display, a printer, a mouse and a keyboard. The regulating valve 16 is controlled by a computer, so that the temperature and the pressure in the refractory furnace 9 are accurately controlled according to the regulations of the experimental method for fire resistance of building elements.
Furthermore, according to the experimental requirements, the fire-resistant furnace 9 is an open cuboid with the length of 3m, the width of 3m and the height of 2.5m, and the furnace body of the fire-resistant furnace 9 is made of high-temperature resistant materials; the furnace wall of the fire-resistant furnace 9 consists of a light heat-insulating brick with the thickness of 10mm and a light fire-resistant ceramic fiber with the thickness of 400mm, so that the self weight can be reduced, and the fire-resistant furnace 9 can move in the longitudinal direction conveniently.
In conclusion, the experimental device provided by the invention has a simple and uncomplicated structure, can independently realize the experimental simulation of the load bearing capacity of the bridge and the fire bearing capacity of the bridge, and can also simulate the experimental state of the load bearing capacity of the bridge and the fire. The fire-resistant furnace 9 is connected with the longitudinal floor sliding groove 10 through the fire-resistant furnace electric roller 14, and plays a role in simulating fire instead of supporting the bridge, so that the fire of the bridge at different positions can be simulated by moving the fire-resistant furnace 9; the beam reaction frame 5 is connected in the track channel steel 7 through an electric roller, and the simulation of the loading of the bridges at different positions is realized by moving the beam reaction frame 5.
In addition, the invention also discloses an experimental method for simulating the bridge fire load, which utilizes the experimental device for simulating the bridge fire load, and comprises the following specific steps:
1) according to the span of the test bridge and the experimental requirements, the distance relationship between the movable support 19 and the refractory furnace 9 is controlled by using a remote control device so as to meet the experimental requirements;
2) the test beam is lifted and lowered to the movable support 19 by the lifting device, the movable support 19 plays a role of simulating the support at this time, and the test beam is ensured not to be in contact with the refractory furnace 9 so as to avoid crushing the refractory furnace 9.
3) Moving the simulation bridge fire receiving device to the lower part of the loading device by using the remote control device;
4) according to the loading position requirement, the cross beam reaction frame 5 is moved to the corresponding position through a remote control device, and then the jack 6 is moved to the corresponding position.
5) The regulating valve 16, and thus the opening and closing of the combustion nozzle 17, is controlled by computer means.
6) The combustion nozzle 17 in the refractory furnace 9 was opened to perform a simulation of the bridge fire test.
7) And manually opening the smoke exhaust pipeline 12 to perform smoke exhaust measures in the bridge fire experiment.
8) And connecting the jack 6 to external equipment to load the test beam.
Therefore, by using the method for simulating the experimental device for the bridge under the condition of fire, the experimental state that the bridge bears the load and is under the condition of fire can be simulated, and the experimental simulation of the bridge under the condition of fire and load at different positions can be realized by moving the simulation fire-receiving device.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It will be understood that the invention is not limited to the details described above, and that modifications and variations are possible without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (9)
1. The utility model provides an experimental apparatus that simulation bridge receives fire load, its characterized in that includes: a loading device and a simulation fire-receiving device,
the loading device comprises fixed supports symmetrically distributed on two sides of the simulated fire receiving device, a plurality of beam reaction frames (5) are mounted between the fixed supports on the two sides of the simulated fire receiving device, the upper and lower surfaces of two ends of each beam reaction frame (5) are in butt joint with reserved openings (8) in the track channel steel (7) through electric rollers (18), and the electric rollers (18) are connected with a remote control device; the lower surface of each beam reaction frame (5) is provided with a pulley notch, a pulley is installed in each pulley notch, and the jack (6) is connected with the beam reaction frame (5) through the pulley notch and the pulley;
the simulated fire receiving device comprises a fire-resistant furnace (9), a longitudinal floor sliding chute (10), a transverse floor sliding chute (11) and a plurality of movable supports (19); the fire-resistant furnace (9) and the movable support (19) are respectively connected with the longitudinal floor sliding chute (10) in a sliding manner, and the fire-resistant furnace (9) and the movable support (19) move along the longitudinal floor sliding chute (10) under the control of a remote control device;
a smoke exhaust pipeline (12) is arranged above the inside of the fire-resistant furnace (9), combustion nozzles (17) are uniformly distributed on the wall of the fire-resistant furnace (9), the outer sides of the combustion nozzles (17) are connected with a fuel pipeline (13), an adjusting valve (16) is arranged on the fuel pipeline (13), and the adjusting valve (16) is connected with computer control equipment;
the electric roller (14) of the fire-resistant furnace is installed at the bottom of the fire-resistant furnace (9), the electric roller (15) of the movable support is installed at the bottom of the movable support (19), and the electric roller (14) of the fire-resistant furnace and the electric roller (15) of the movable support are both connected with a remote control device.
2. The experimental device for simulating the fire load of the bridge according to claim 1, wherein the fixing support comprises a fixing base (1), a vertical column (3) and a track channel steel (7), the fixing base (1) is fixedly installed on the ground, the vertical column (3) is installed above the fixing base (1), and the track channel steel (7) is installed above the vertical column (3).
3. The experimental device for simulating the fire load of the bridge according to claim 2, wherein the fixed base (1) is fixedly connected to the ground through base bolts (2), the upright column (3) is welded and fixed with the fixed base (1), and the track channel steel (7) is fixedly connected with the upright column (3) through track channel steel bolts (4).
4. The experimental device for simulating the fire load of the bridge according to claim 2, wherein the fixed base (1), the upright column (3), the track channel steel (7) and the cross beam reaction frame (5) are all made of high-strength steel materials.
5. The experimental device for simulating the fire load of the bridge according to claim 1, wherein the electric rollers (14) of the fire-resistant furnace are respectively installed at four corners of the bottom of the fire-resistant furnace (9).
6. The experimental device for simulating the fire load of the bridge according to claim 1, wherein the number of the movable supports (19) is multiple, and the plurality of the movable supports (19) are respectively located on two sides of the fire-resistant furnace (9).
7. The experimental device for simulating a fire load on a bridge according to claim 1, wherein the remote control device is a wireless remote controller.
8. The experimental device for simulating the fire load of the bridge according to claim 1, wherein the fire-resistant furnace (9) is an open cuboid, a furnace body of the fire-resistant furnace (9) is made of high-temperature-resistant materials, and a furnace wall is composed of light heat-insulating bricks with the thickness of 10mm and light fire-resistant ceramic fibers with the thickness of 400 mm.
9. An experimental method for simulating bridge fire load, which is characterized in that the experimental device for simulating bridge fire load according to any one of claims 1-8 is used, and comprises the following steps:
1) according to the span of the test bridge and the experimental requirements, the distance relationship between the movable support (19) and the refractory furnace (9) is controlled by using a remote control device to meet the experimental requirements;
2) hoisting the test beam by using a hoisting device and lowering the test beam to a movable support (19);
3) moving the simulation bridge fire receiving device to the lower part of the loading device by using the remote control device;
4) according to the requirement of the loading position, the cross beam reaction frame (5) is moved to the corresponding position through a remote control device, and then the jack (6) is moved to the corresponding position;
5) controlling the regulating valve (16) by using computer equipment, and controlling the opening and closing of the combustion nozzle (17);
6) starting a combustion nozzle (17) in a refractory furnace (9) to simulate a bridge fire experiment;
7) opening a smoke exhaust pipeline (12) and performing smoke exhaust measures in a bridge fire experiment;
8) and connecting the jack (6) to external equipment to load the test beam.
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| CN201910861192.8A CN110595812B (en) | 2019-09-12 | 2019-09-12 | Experimental device and experimental method for simulating bridge under fire and load |
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| CN210571426U (en) * | 2019-09-12 | 2020-05-19 | 长安大学 | Experimental device for simulating bridge under fire and load |
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2019
- 2019-09-12 CN CN201910861192.8A patent/CN110595812B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110110393A1 (en) * | 2009-11-10 | 2011-05-12 | Korea Institute Of Construction Technology | Heating furnace for testing middle and long span structures |
| CN202359849U (en) * | 2011-12-16 | 2012-08-01 | 山东建筑大学 | Simple parking equipment with two parking spaces |
| CN106500936A (en) * | 2016-12-09 | 2017-03-15 | 山东交通学院 | Bridge Fire-damaged mechanism and bearing capacity experimental provision and method |
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