CN110425884B - Collaborative deformation resistance furnace suitable for three-dimensional frame structure fire test - Google Patents
Collaborative deformation resistance furnace suitable for three-dimensional frame structure fire test Download PDFInfo
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- CN110425884B CN110425884B CN201910623633.0A CN201910623633A CN110425884B CN 110425884 B CN110425884 B CN 110425884B CN 201910623633 A CN201910623633 A CN 201910623633A CN 110425884 B CN110425884 B CN 110425884B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/02—Furnaces of a kind not covered by any preceding group specially designed for laboratory use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
The application relates to the technical field of building structure disaster prevention and reduction, and provides a collaborative deformation resistance furnace suitable for a three-dimensional frame structure fire test, which comprises a base, a lower furnace body, an upper furnace body moving device, a high-frequency laser ranging sensor, a control system and the like; the lower furnace body and the upper furnace body are designed in a split mode, the lower furnace body is installed on the base in a left-right sliding mode, and the upper furnace body is installed outside the lower furnace body in a vertical sliding mode and connected with the upper furnace body moving device; the high-frequency laser ranging sensor is connected with the control system and transmits the measured distance and speed to the control system; and the control system is connected with the upper furnace body moving device and used for controlling the upper furnace body moving device to drive the upper furnace body to slide along the lower furnace body according to the distance and the speed and synchronizing with the vertical deformation of the test three-dimensional frame structure. The method and the device can be suitable for the three-dimensional frame structure, allow the measured three-dimensional frame structure to deform greatly, and can achieve the good synergistic deformation effect of the resistance furnace and the three-dimensional frame structure.
Description
Technical Field
The application relates to the technical field of building structure disaster prevention and reduction, in particular to a collaborative deformation resistance furnace suitable for a three-dimensional frame structure fire test.
Background
The collapse of buildings in fire is one of secondary disasters of the fire, and the fire causes great loss to human lives and properties. The steel structure is not fire-resistant, and when the temperature is increased to 600 ℃, the steel loses most of the strength, so that the fire-affected components are damaged, and further the sequential failure of the peripheral components and even the structural collapse, namely the continuous collapse, are caused. Therefore, the method has important practical significance for researching how to prevent the steel structure from continuously collapsing in the fire.
At present, the continuous collapse test research on the steel frame structure under fire at home and abroad is relatively less, and the steel frame structure is mostly in a numerical simulation state. The main reason for this is that experimental studies take much money and time, and secondly, there is a lack of a resistance furnace which can be applied to fire tests with a three-dimensional frame structure. At present, the resistance furnace can only carry out a plane frame structure fire test or a three-dimensional frame structure fire test without a floor slab. Moreover, the existing resistance furnace suitable for the fire test of the plane frame structure has the following defects: (1) because the height of the device is fixed, the device can only heat a test piece with a single height; (2) the device is only suitable for fire tests of the plane frame; (3) the heat preservation device is hung on the test piece, the deformation is passive, and some test components are possibly inconvenient to hang the heat preservation device; (4) after the test piece device is greatly deformed, the heat preservation device sinks, a large gap is formed above the furnace body, hot gas can be exposed, and the electric furnace is difficult to continue to heat up.
Disclosure of Invention
The utility model provides a purpose for, overcome prior art's not enough, expand the research means that the anti continuity of steel construction collapsed under the conflagration, provide a deformation resistance furnace in coordination suitable for three-dimensional frame construction fire test to be adapted to three-dimensional frame construction and allow surveyed three-dimensional frame construction to take place the large deformation, can realize resistance furnace and the better deformation effect in coordination of three-dimensional frame construction.
In order to achieve the above object, the present application provides the following technical solutions:
a cooperative deformation resistance furnace suitable for a three-dimensional frame structure fire test comprises a base, a lower furnace body, an upper furnace body, a heating resistance wire, an upper furnace body moving device, a high-frequency laser ranging sensor and a control system;
the lower furnace body comprises a first lower furnace body and a second lower furnace body, the first lower furnace body and the second lower furnace body are oppositely arranged and are respectively installed on the base in a left-right sliding manner, and the first lower furnace body and the second lower furnace body form the lower furnace body after being closed; the upper furnace body comprises a first upper furnace body and a second upper furnace body, the first upper furnace body is sleeved outside the first lower furnace body in a vertically sliding manner, the second upper furnace body is sleeved outside the second lower furnace body in a vertically sliding manner, and the first upper furnace body and the second upper furnace body are closed to form the upper furnace body; the upper furnace body is connected with the upper furnace body moving device and slides up and down along the lower furnace body under the driving of the upper furnace body moving device; heating resistance wires are uniformly distributed on the surface of the inner side wall of the lower furnace body and the surface of the inner top wall of the upper furnace body;
corresponding to the position where the first upper furnace body and the second upper furnace body are jointed, opposite grooves are respectively formed in the middle positions of the tops of the first upper furnace body and the second upper furnace body and used for penetrating through the heated frame column of the test three-dimensional frame structure;
the high-frequency laser ranging sensors are respectively connected with the control system and used for emitting laser to the lower surface of the non-fired beam or plate on the upper part of the test three-dimensional frame structure so as to measure the vertical deformation descending distance and speed of the lower surface of the non-fired beam or plate on the upper part of the test three-dimensional frame structure when the fired frame column is buckled and transmit the distance and speed to the control system;
and the control system is connected with the upper furnace body moving device and used for controlling the upper furnace body moving device to drive the upper furnace body to slide along the lower furnace body according to the distance and the speed and synchronizing with the vertical deformation of the test three-dimensional frame structure.
Furthermore, the high-frequency laser ranging sensors can be arranged on the upper surface of the resistance furnace right below the lower surface of the non-fired beam or plate on the upper part of the test three-dimensional frame structure, and emit laser to the lower surface of the non-fired beam or plate on the upper part of the test three-dimensional frame structure vertically without being influenced.
In the application, the position of the high-frequency laser ranging sensor can be adjusted according to specific conditions, and for example, the high-frequency laser ranging sensor can be arranged below the position where the vertical deformation of the lower surface of a non-fire beam or a plate on the upper part of a three-dimensional frame structure is the largest; or the high-frequency laser ranging sensor can also be arranged at other positions near the outer part of the whole assembled resistance furnace, such as the lower surface of a non-fire beam plate fixed on the upper part of the test three-dimensional frame structure right above the upper furnace body, or a fixed object placed on the ground or the ground, and the like.
Furthermore, a group of upper furnace body moving devices can be respectively arranged on the outer sides of the first upper furnace body and the second upper furnace body; the two groups of upper furnace body moving devices can be arranged on the base in a left-right sliding manner and are respectively used for controlling the first upper furnace body and the second upper furnace body to slide up and down;
in the application, heating resistance wires are uniformly distributed on the surface of the inner side wall of the lower furnace body and the inner surface of the top of the upper furnace body; the heating resistance wire is not arranged on the surface of the inner wall of the upper furnace body which slides in contact with the lower furnace body, and the heating resistance wire is not arranged on the surface of the inner wall of the top of the upper furnace body which is in contact with the lower furnace body in a non-working state.
Furthermore, heating resistance wires arranged in the first upper furnace body, the second upper furnace body, the first lower furnace body and the second lower furnace body are respectively connected with different furnace body switches, so that uniform temperature rise of the heated frame columns can be realized by controlling different furnace body switches in the test process.
Furthermore, the inner surfaces of the upper furnace body and the lower furnace body are both provided with heat insulation materials.
In this application, the contact department of going up furnace body and furnace body down is dabbing, for accomplishing to go up the furnace body and be dabbing the state down between the furnace body, in the time of design furnace body size, can let the inner wall of going up the furnace body and the outer wall of furnace body down be the contact, and the surfacing of both contacts is smooth, and the insulation material of going up the furnace body can adopt the flexible material that has certain deformability. The upper furnace body and the lower furnace body are in light touch, so that the upper furnace body is not hindered in the process of moving downwards.
In the application, the first lower furnace body and the first upper furnace body form a left side furnace body, and the second lower furnace body and the second upper furnace body form a right side furnace body; under the working state, the left furnace body and the right furnace body can be connected together in a involution way.
Furthermore, corresponding to the position where the first upper furnace body and the second upper furnace body are combined, two bolts which are oppositely arranged are further installed on the outer side walls of the first upper furnace body and the second upper furnace body, and the left side furnace body and the right side furnace body are connected together through the mutual insertion of the two bolts after the left side furnace body and the right side furnace body are combined.
Further, the control system can also directly output the vertical deformation descending distance and speed of the lower surface of the non-fire beam plate on the upper part of the three-dimensional frame structure to be tested, and the output result is the deformation size and speed of the test piece.
Further, the upper furnace body and/or the lower furnace body are/is also provided with a temperature sensor, and the temperature sensor is connected with the control system, is used for transmitting the measured temperature change inside the upper furnace body and the lower furnace body to the control system, and can output the temperature change through the control system.
Further, a display device connected with the processor is arranged in the control system and used for outputting the size and the speed of the deformation of the test piece and the temperature change of the inner parts of the upper furnace body and the lower furnace body.
In the application, the vertical movement of the upper furnace body is controlled by the control system and can not freely ascend or descend.
In the present application, the contact distance between the upper and lower furnace bodies can be adjusted to adjust the heated frame columns to accommodate test members of different heights, but this adjustable height is a range given the dimensions of the resistance furnace. Because, when the frame post that receives fire buckled, the contact distance between upper furnace body and the lower furnace body is the biggest, and the post height is the minimum post height that this resistance furnace can be suitable for under this experimental three-dimensional frame loaded condition this moment, and the test component that is greater than this height all can be suitable for this resistance furnace, but the frame post that receives fire height has a maximum value.
In the application, the height of the heated frame column can be adjusted by adjusting the contact distance between the upper furnace body and the lower furnace body, and the heated area of the heated frame column can be adjusted, but the process can only adjust the heated area of the heated frame column from the column bottom to a certain column height, for example, the column bottom can not be heated, but the part above the column bottom can not be heated.
Compared with the prior art, the beneficial effect of this application lies in:
(1) the fire disaster testing device not only can be suitable for fire disaster tests of the plane frame, but also divides the whole electric furnace into an upper half and a lower half, and the upper furnace body can move up and down relative to the lower furnace body so as to be suitable for and realize the capability of adapting to large deformation of the three-dimensional frame.
(2) This application assembled resistance furnace has adopted high frequency laser rangefinder to combine the data of high frequency laser rangefinder, realize going up the automatic control of furnace body motion.
(3) The assembled resistance furnace can adapt to test specimens with different heights, and the height can be continuously adjusted within a certain range.
(4) The motion of the upper furnace body of the assembled resistance furnace is actively controlled, and in the test, the heated area of the test frame structure can be adjusted according to different test requirements.
(5) After the test piece is greatly deformed, no gap is formed between the upper furnace body and the lower furnace body, and the temperature can be continuously increased or a better heat preservation effect can be realized.
Drawings
Fig. 1 is a schematic structural diagram of a cooperative deformation resistance furnace suitable for a three-dimensional frame structure fire test provided in an embodiment of the present application.
Fig. 2 is a schematic view of a base and a rail provided in an embodiment of the present application.
FIG. 3 is a schematic view of a lower furnace body provided in an embodiment of the present application.
FIG. 4 is a schematic view of a single-side furnace body in a non-operating state according to an embodiment of the present application.
Fig. 5 is a logic diagram of an active electric furnace control system according to an embodiment of the present disclosure.
Fig. 6 is a schematic view of the installation completion state of the cooperative deformation resistance furnace suitable for the three-dimensional frame structure fire test provided by the embodiment.
Reference numerals and symbols in the drawings: the device comprises a first guide rail, a base, a lower furnace body, a second guide rail, an upper furnace body, a moving device of the upper furnace body, a high-frequency laser ranging sensor, a bolt, a fire frame column and a test three-dimensional frame structure, wherein the first guide rail is 1, the base is 2, the lower furnace body is 3, the second guide rail is 4, the upper furnace body is 5, the moving device of the upper furnace body is 6, the high-frequency laser ranging sensor.
Detailed Description
The technical solutions provided in the present application will be further described with reference to the following specific embodiments and accompanying drawings. The advantages and features of the present application will become more apparent in conjunction with the following description.
As shown in fig. 1 to 6, the cooperative deformation resistance furnace suitable for the fire test with the three-dimensional frame structure comprises a first guide rail 1, a base 2, a lower furnace body 3, an upper furnace body 5, a heating resistance wire, an upper furnace body moving device 6, a high-frequency laser ranging sensor 7 and a control system.
The base 2 can adopt a frame structure, and a first guide rail 1 is respectively arranged on the front frame and the rear frame of the frame structure; the lower furnace body 3 comprises a first lower furnace body and a second lower furnace body which are oppositely arranged left and right, the bottoms of the first lower furnace body and the second lower furnace body are respectively provided with a first roller, the first lower furnace body and the second lower furnace body are respectively arranged on two first guide rails in a left-right sliding mode through the first rollers at the bottoms of the first lower furnace body and the second lower furnace body, and the first lower furnace body and the second lower furnace body are oppositely combined to form the lower furnace body 3; go up furnace body 5 including control relative first last furnace body and the second that sets up and go up the furnace body, and first last furnace body overlaps in the outside of first furnace body with sliding from top to bottom, the furnace body overlaps in the outside of furnace body under the second with sliding from top to bottom on the second, second guide rail 4 is all installed in the outside around first furnace body and second furnace body down, the second gyro wheel is all installed to the inside wall around furnace body on first last furnace body and the second, furnace body is gone up through second gyro wheel on its inner wall separately on first last furnace body and the second and is installed on second guide rail 4 with sliding from top to bottom, and furnace body forms last furnace body after furnace body involution on first last furnace body and the second.
Furthermore, the inner surfaces of the upper furnace body 5 and the lower furnace body 3 are both provided with heat insulation materials.
In this application, the contact department of going up furnace body 5 and furnace body 3 is dabbing, for accomplishing to go up the furnace body 5 and be dabbing the state between the furnace body 3 down, in the time of design furnace body size, can let the inner wall of going up furnace body 5 and the outer wall of furnace body 3 down be the contact, and the surface of both contacts levels smoothly, and the insulation material of going up furnace body 5 can adopt the flexible material that has certain deformability. The upper furnace body 5 and the lower furnace body 3 are in light touch, so that the upper furnace body 5 is not blocked in the process of moving downwards.
Furthermore, heating resistance wires are uniformly distributed on the surface of the inner side wall of the lower furnace body 3 and the inner surface of the top of the upper furnace body 5; the heating resistance wire is not arranged on the surface of the inner wall of the upper furnace body 5 which is in contact with the lower furnace body 3 and slides, and the heating resistance wire is not arranged on the surface of the inner wall of the top of the upper furnace body 5 which is in contact with the lower furnace body 3 in a non-working state. The first upper furnace body, the second upper furnace body, the first lower furnace body and the second lower furnace body heating resistance wires are respectively controlled by different furnace body switches, and the uniform temperature rise of the heated frame columns 9 can be realized by controlling different furnace body switches in the test process.
Further, corresponding to the position where the first upper furnace body and the second upper furnace body are combined, opposite grooves are further formed in the middle positions of the tops of the first upper furnace body and the second upper furnace body, and the heated frame columns 9 of the test three-dimensional frame structure 10 are allowed to pass through the grooves during installation.
In the application, the first lower furnace body and the first upper furnace body form a left side furnace body, and the second lower furnace body and the second upper furnace body form a right side furnace body; under the working state, the left furnace body and the right furnace body are connected together in an involutory way.
Furthermore, corresponding to the position where the first upper furnace body and the second upper furnace body are combined, two bolts 8 which are oppositely arranged are further installed on the outer side walls of the first upper furnace body and the second upper furnace body, and the left side furnace body and the right side furnace body are connected together through the mutual insertion of the two bolts 8 after the left side furnace body and the right side furnace body are combined.
In a preferred embodiment, the end of the plug pin 8 is provided with a bolt hole, before the test is started, the fired frame column 9 of the test three-dimensional frame structure 10 is firstly installed at the right central position after the left and right furnace bodies are closed, so as to ensure that the fired frame column 9 can pass through a groove arranged at the top of the upper furnace body 5 after the left and right furnace bodies are closed, then the positions of other non-fired frame columns are determined by taking the fired frame column 9 as the center, the non-fired frame columns are installed at corresponding positions, the positions of the frame columns are checked once after all the frame columns are installed, so as to ensure that the positions of all the frame columns are not wrong, after all the frame columns of the test three-dimensional frame structure 10 are installed, the frame beams are hoisted, the floor slabs can be installed after the frame beams are installed, the floor slabs can be installed after the floor slabs are installed, at this time, after the test three-dimensional frame structure 10 is installed, the left furnace body and the right furnace body are closed, the left furnace body and the right furnace body are connected together by bolts penetrating through bolt holes at the tail ends of the bolts 8, and the upper furnace body 5 and the lower furnace body 3 after connection are kept in light contact without influencing the vertical movement of the upper furnace body 5.
Further, five high-frequency laser ranging sensors 7 are installed on the outer surface of the top of the upper furnace body 5, and in the embodiment, the high-frequency laser ranging sensors 7 can be installed on the upper surface of the resistance furnace directly below the lower surface of the non-fire beam or plate on the upper part of the experimental three-dimensional frame structure. In the present application, the position of the high frequency laser ranging sensor 7 can also be adjusted according to the specific situation, such as being placed on the ground or on a fixed object on the ground.
In the present application, the laser emitting portion of the high-frequency laser ranging sensor 7 emits laser to the lower surface of the upper non-fire beam or plate of the test three-dimensional frame structure 10, and the optical signal reflected by the lower surface of the upper non-fire beam or plate of the test three-dimensional frame structure 10 can be received by the high-frequency laser ranging sensor 7 again.
Further, the laser emitting parts of the high-frequency laser ranging sensors 7 vertically emit laser to the lower surfaces of the beams or plates of the non-fired parts at the upper part of the test three-dimensional frame structure 10, and the laser emitting parts are not influenced mutually.
In the present application, the distance of the vertical deformation descent of the laser emitting portion thereof to the lower surface of the non-fire beam or plate on the upper portion of the test three-dimensional frame structure 10 is measured by the high-frequency laser ranging sensor 7. The high-frequency laser ranging sensor 7 is used for measuring the distance, and belongs to the prior art. The working principle is as follows: the high-frequency laser ranging sensor 7 emits laser at a certain ultrahigh sampling frequency to continuously measure the vertical deformation descending distance between the laser emitting part and the lower surface of the beam or the plate of the non-fired part at the upper part of the test three-dimensional frame structure 10, and calculates the difference value of the two distances in sequence in a very short time, so that the vertical deformation descending distance of the lower surface of the non-fired beam or the plate at the upper part of the test three-dimensional frame structure 10 when the fired frame column 9 is bent can be obtained.
Further, the vertical deformation descending speed of the lower surface of the non-fired beam or plate on the upper part of the three-dimensional frame structure 10 when the fired frame column 9 is buckled is measured by the high-frequency laser ranging sensor 7 in the application, and the technology also belongs to the prior art. The principle is as follows: the high-frequency laser ranging sensor 7 compares the measured vertical deformation descending distance of the lower surface of the non-fired beam or plate on the upper part of the test three-dimensional frame structure 10 with the time, and the vertical deformation descending speed of the lower surface of the non-fired beam or plate on the upper part of the test three-dimensional frame structure 10 when the fired frame column 9 is bent can be obtained.
In the application, all the high-frequency laser ranging sensors 7 are respectively connected with the control system, and the measured vertical deformation descending distance and speed of the lower surface of the non-fired beam or plate on the upper part of the test three-dimensional frame structure 10 when the fired frame column 9 is bent are transmitted to the control system.
Further, an upper furnace body moving device 6 is installed on the outer side of the upper furnace body 5 and used for controlling the upper furnace body 5 to slide up and down along the lower furnace body 3. A set of upper furnace body moving devices 6 can be respectively installed on the outer sides of the first upper furnace body and the second upper furnace body so as to respectively control the up-and-down sliding of the first upper furnace body along the first lower furnace body and the up-and-down sliding of the second upper furnace body along the second lower furnace body. By way of example and not limitation, the upper furnace body moving means 6 may employ a hydraulic ram.
The application provides a resistance furnace warp in coordination, under non-operating condition, go up on furnace body 5 can directly support furnace body 3 down to can link together left and right side furnace body through bolt 8.
When in test, firstly, the left and the right single-side furnace bodies are pulled apart along the first guide rail 1, the fired frame column 9 of the test three-dimensional frame structure 10 is arranged at the right center position of the involution of the left and the right furnace bodies, the position of the fired frame column 9 is to ensure that the left and the right furnace bodies can pass through the involution groove at the tops of the first upper furnace body and the second upper furnace body after the involution, then the positions of other non-fired frame columns are determined by taking the fired frame column 9 as the center, the non-fired frame columns are arranged at corresponding positions, the positions of the frame columns are checked once after all the frame columns are arranged, after all the frame columns of the test three-dimensional frame structure 10 are arranged without errors, the frame beams are hoisted, the frame beams can be arranged after the frame beams are arranged, the plate can be arranged after the frame beams are arranged, at the moment, the whole test three-dimensional frame structure 10 is arranged, after the, two unilateral furnace bodies about will promote towards the centre to the furnace body 5 up moves on the control, installs bolt 8 after two unilateral furnace body contacts, couples together two unilateral furnace bodies. At the moment, the whole test device is installed, after the high-frequency laser ranging sensor 7 is turned on, the heating resistance wires in the upper furnace body and the lower furnace body are electrified through the furnace body switch to carry out a heating test, and the temperature can be raised according to an ISO834 international standard heating curve or other heating curves, such as a hydrocarbon fire heating curve, a uniform linear heating curve and the like.
When the frame column 9 under fire is greatly deformed, the upper part of the three-dimensional frame structure 10 without fire is influenced to move downwards, the vertical deformation descending distance and speed of the lower surface of the beam plate under fire on the upper part of the three-dimensional frame structure 10 under fire are measured by the high-frequency laser ranging sensor 7 and are transmitted to the control system, the control system controls the upper furnace body moving device 6 to drive the upper furnace body 5 to slide along the lower furnace body 3 according to the distance and speed, so as to realize vertical cooperative deformation with the three-dimensional frame structure 10 under fire, namely, the distance of the downward movement of the upper furnace body 5 is the same as the maximum vertical deformation distance of the lower surface of the beam or plate under fire on the upper part of the three-dimensional frame structure 10 under fire, and the downward movement speed of the upper furnace body 5 is the same as the vertical deformation speed of the lower surface of the beam or plate under fire on the upper part of the three-dimensional frame, the cooperative deformation resistance furnace and the test three-dimensional frame structure 10 can form a good cooperative deformation effect.
Further, the control system can also directly output the vertical deformation descending distance and speed of the lower surface of the non-fire beam plate on the upper part of the three-dimensional frame structure 10 to be tested, and the output result is the deformation size and speed of the test piece.
Further, a temperature sensor is arranged in the upper furnace body 5 and/or the lower furnace body 3, and the temperature sensor is connected with the control system, is used for transmitting the measured temperature change inside the upper furnace body and the lower furnace body to the control system, and can output the temperature change through the control system.
By way of example and not limitation, a display device is further arranged in the control system and used for outputting the deformation size and speed of the test piece and/or the temperature change inside the upper furnace body and the lower furnace body.
The above description is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the present application in any way. Any changes or modifications made by those skilled in the art based on the above disclosure should be considered as equivalent effective embodiments, and all the changes or modifications should fall within the protection scope of the technical solution of the present application.
Claims (10)
1. The utility model provides a deformation resistance stove in coordination suitable for three-dimensional frame construction fire test which characterized in that: the device comprises a base (2), a lower furnace body (3), an upper furnace body (5), a heating resistance wire, an upper furnace body moving device (6), a high-frequency laser ranging sensor (7) and a control system;
the lower furnace body (3) comprises a first lower furnace body and a second lower furnace body, the first lower furnace body and the second lower furnace body are arranged oppositely and are respectively installed on the base (2) in a left-right sliding manner, and the first lower furnace body and the second lower furnace body form the lower furnace body (3) after being closed; the upper furnace body (5) comprises a first upper furnace body and a second upper furnace body, the first upper furnace body is sleeved on the outer side of the first lower furnace body in a vertically sliding manner, the second upper furnace body is sleeved on the outer side of the second lower furnace body in a vertically sliding manner, and the first upper furnace body and the second upper furnace body are closed to form the upper furnace body (5); the upper furnace body (5) is connected with the upper furnace body moving device (6) and slides up and down along the lower furnace body (3) under the drive of the upper furnace body moving device (6); heating resistance wires are uniformly distributed on the surface of the inner side wall of the lower furnace body (3) and the surface of the inner top wall of the upper furnace body (5);
corresponding to the position where the first upper furnace body and the second upper furnace body are combined, opposite grooves are respectively formed in the middle positions of the tops of the first upper furnace body and the second upper furnace body and used for penetrating through a heated frame column (9) of the test three-dimensional frame structure (10);
the high-frequency laser ranging sensors (7) are arranged, are respectively connected with the control system, and are used for emitting laser to the lower surface of the non-fired beam or plate on the upper part of the test three-dimensional frame structure (10) so as to measure the vertical deformation descending distance and speed of the lower surface of the non-fired beam or plate on the upper part of the test three-dimensional frame structure (10) when the fired frame column (9) is bent, and transmit the distance and speed to the control system;
the control system is connected with the upper furnace body moving device (6) and used for controlling the upper furnace body moving device (6) to drive the upper furnace body (5) to slide along the lower furnace body (3) according to the distance and the speed and to be synchronous with the vertical deformation of the three-dimensional frame structure (10) for testing.
2. The cooperative deformation electric resistance furnace suitable for the three-dimensional frame structure fire test of claim 1, wherein: the high-frequency laser ranging sensors (7) are all arranged on the upper surface of the resistance furnace right below the lower surface of the non-fired beam or plate on the upper part of the three-dimensional testing frame structure (10), and emit laser to the lower surface of the non-fired beam or plate on the upper part of the three-dimensional testing frame structure (10).
3. The cooperative deformation electric resistance furnace suitable for the three-dimensional frame structure fire test of claim 1, wherein: a first guide rail (1) is arranged on the base (2);
the bottom of the first lower furnace body and the bottom of the second lower furnace body are both provided with first rollers, and the first lower furnace body and the second lower furnace body are respectively arranged on the first guide rail in a left-right sliding manner through the first rollers at the bottoms of the first lower furnace body and the second lower furnace body.
4. The cooperative deformation electric resistance furnace suitable for the three-dimensional frame structure fire test of claim 1, wherein: and second guide rails (4) are respectively arranged on the outer sides of the first lower furnace body and the second lower furnace body, second rollers are respectively arranged on the inner sides of the first upper furnace body and the second upper furnace body, and the first upper furnace body and the second upper furnace body are respectively arranged on the second guide rails (4) in a vertically sliding manner through the second rollers arranged on the inner sides of the first upper furnace body and the second upper furnace body.
5. The cooperative deformation electric resistance furnace suitable for the three-dimensional frame structure fire test of claim 1, wherein: a group of upper furnace body moving devices (6) are respectively arranged at the outer sides of the first upper furnace body and the second upper furnace body;
the two groups of upper furnace body moving devices (6) are arranged on the base (2) in a left-right sliding manner and are respectively used for controlling the first upper furnace body and the second upper furnace body to slide up and down.
6. The cooperative deformation electric resistance furnace suitable for the three-dimensional frame structure fire test of claim 1, wherein: heating resistance wires arranged in the first upper furnace body, the second upper furnace body, the first lower furnace body and the second lower furnace body are respectively connected with different furnace body switches.
7. The cooperative deformation electric resistance furnace suitable for the three-dimensional frame structure fire test of claim 1, wherein: the inner surfaces of the upper furnace body (5) and the lower furnace body (3) are both provided with heat insulation materials.
8. The cooperative deformation electric resistance furnace suitable for the three-dimensional frame structure fire test of claim 1, wherein: the first lower furnace body and the first upper furnace body form a left furnace body, and the second lower furnace body and the second upper furnace body form a right furnace body;
and two bolts (8) which are oppositely arranged are further arranged on the outer side walls of the first upper furnace body and the second upper furnace body corresponding to the opposite positions of the first upper furnace body and the second upper furnace body, so that the left and right furnace bodies are connected together by mutually inserting the two bolts (8) after the left and right furnace bodies are oppositely arranged.
9. The cooperative deformation electric resistance furnace suitable for the three-dimensional frame structure fire test of claim 1, wherein: a temperature sensor is also arranged in the upper furnace body (5) and/or the lower furnace body (3);
the temperature sensor is connected with the control system and used for measuring the temperature change inside the upper furnace body and the lower furnace body and transmitting the temperature change to the control system.
10. The cooperative deformation electric resistance furnace suitable for the fire test of the three-dimensional frame structure according to claim 1 or 9, wherein: the control system is also provided with a display device for outputting the distance and speed of the vertical deformation and descending of the lower surface of the non-heated beam slab on the upper part of the three-dimensional frame structure (10) and/or
The temperature inside the upper and lower furnace bodies changes.
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