CN101408536B - Fire-proof test device of concrete multi-span continues beam or plate - Google Patents

Fire-proof test device of concrete multi-span continues beam or plate Download PDF

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Publication number
CN101408536B
CN101408536B CN2008102095744A CN200810209574A CN101408536B CN 101408536 B CN101408536 B CN 101408536B CN 2008102095744 A CN2008102095744 A CN 2008102095744A CN 200810209574 A CN200810209574 A CN 200810209574A CN 101408536 B CN101408536 B CN 101408536B
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heater
counter
fire
bearing
force
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CN101408536A (en
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董毓利
杨志年
吕俊利
张大山
王勇
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Harbin Institute of Technology
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Harbin Institute of Technology
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Abstract

The invention discloses a concrete multi-span continuous beam or plate fire-resistant experiment device, and relates to a fire-resistant experiment device, aiming at solving the problems that the present measurement of building unit fire-resistance is only the measurement of fire resistance duration of building units and the present measurement can not survey and evaluate the fire-resistant performance such as internal force changes, deformation rules and the like of the building units in fire. Upright posts are placed on the surrounding of the support saddle of test pieces; two roof bolts are placed on the ground of the two longitudinal outer sides of a reaction force frame; a weighing sensor is arranged under a reaction force beam; a jack is arranged under the weighing sensor; a nozzle is arranged at the place of a jet; an oil pump is connected with the nozzle and is also connected with a fuel tank; a blower is communicated with the jet; a flue is arranged at the lower parts of a furnace body and the side wall of the adjacent testing piece support saddle thereof; and the upper parts of the furnace body and the side wall of the adjacent testing piece support saddle are provided with at least two thermoelectric couples. The invention provides test devices for the concrete multi-span continuous beam or plate fire-resistant experiments, satisfies the experimenting requirements such as warming, boundary constraining, reaction force measuring, loading, etc.

Description

The anti-fire test device of concrete continuous beam on many supports or plate
Technical field
The present invention relates to a kind of anti-fire test device.
Background technology
Intensive day by day along with the continuous increase of the progress of society, population and buildings, fire also takes place more and more frequently, brings about great losses for the property of country and the people's life security.Particularly in recent years, urban population density increases day by day, and the developing rapidly of skyscraper more increased the frequency that fire takes place and the difficulty of fire-fighting.For fear of unnecessary loss; Strengthen fire prevention, the fire resistance of buildings; At first should be appreciated that architecture beam or plate stressed behavior and the deformation rule under fire, measure the fire resistance of beam or plate, at present; Domestic fire testing to building element just utilizes combustion furnace to measure simply the fire endurance of building element, can not change and fire resistance such as deformation rule is measured the internal force of building element under fire.
Summary of the invention
The objective of the invention is to measure for the mensuration that solves existing building member fire performance adopts combustion furnace; Just the building element fire endurance is simply measured; The problem that can not measure fire resistances such as the internal force variation of building element under fire, deformation rules provides the anti-fire test device of a kind of concrete continuous beam on many supports or plate.
The present invention includes reaction frame, reaction frame is made up of four root posts, two counter-force longerons and at least one counter-force crossbeam, and the two ends of every counter-force longeron are affixed with the side end face of two root posts respectively; The counter-force crossbeam is between two counter-force longerons, and the two ends of counter-force crossbeam are affixed with two counter-force longerons respectively, and it comprises that also at least one displacement measuring device, at least two strides body of heater, test specimen bearing, at least one LOAD CELLS, at least one lifting jack, at least three roller bearings, at least two nozzles, oil pump, fuel tank, blower fan and at least four thermopairs; The inner chamber of test specimen bearing laterally is provided with at least one and isolates bearing; Isolation bearing is divided into two with the inner chamber of test specimen bearing and strides the bearing inner chamber, whenever strides to be provided with one in the bearing inner chamber and to stride body of heater, and the transversely end face of whenever striding bearing is provided with a roller bearing; Four root posts on the reaction frame are arranged on the peripheral ground of test specimen bearing; Displacement measuring device is made up of two anchor poles, vertical pole and at least one displacement meter, and the vertical pole two ends are packed in the top of two anchor poles, and at least one displacement meter is packed on the vertical pole; Displacement measuring device is arranged on the body of heater and two anchor poles are arranged on the ground, vertical two outside of reaction frame; Be provided with at least one LOAD CELLS below the counter-force crossbeam, be provided with lifting jack below the LOAD CELLS, the longitudinal side wall of whenever striding the test specimen bearing that body of heater is adjacent is provided with at least one spout; Nozzle is arranged on the spout place; The output terminal of oil pump is connected with nozzle, and the input end of oil pump is connected with fuel tank, blower fan and spout connection; The lower sidewall of whenever striding the test specimen bearing that body of heater is adjacent is provided with flue; The side wall upper part of whenever striding the test specimen bearing that body of heater is adjacent is provided with at least two thermopairs, and the last plane of body of heater is lower than the last plane of test specimen bearing, and inboard wall of furnace body is built by laying bricks or stones by refractory brick and formed around the body of heater; Furnace body outer wall is built by laying bricks or stones by ordinary red brick and is formed around the body of heater; Fill refractory fibre between inboard wall of furnace body and the outer wall around the body of heater, the bottom of body of heater is built by laying bricks or stones by two-layer refractory brick and is formed, and the upper surface of whenever striding the test specimen bearing that body of heater is adjacent longitudinally is provided with test flume.
The present invention has following beneficial effect: the present invention is that concrete continuous beam on many supports or the anti-fire test of plate under the different operating situation provide well behaved test unit; Basically satisfied testing requirementss such as testing required intensification, boundary constraint, counter-force measurement and loading; Well simulated the fire hazard environment of building element; Anti-fiery test can successfully be accomplished smoothly, thereby for fire resistance such as mechanics and the distortion of research building element under fire and instruct the anti-fire safety design of later building structure to lay a good foundation.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of anti-fire test device of the present invention; Fig. 2 is the A-A cut-open view of Fig. 1; Fig. 3 is the B-B view (removing displacement measuring device 2) of Fig. 1, and Fig. 4 is the vertical view of at least two bodies of heater 3 and test specimen bearing 4, and Fig. 5 is the C-C cut-open view of Fig. 4; Fig. 6 is the D-D cut-open view of Fig. 4; Fig. 7 be the E of Fig. 4 to view, Fig. 8 is the syndeton synoptic diagram of counter-force crossbeam 1-3, test specimen bearing 4, LOAD CELLS 5, lifting jack 6, roller bearing 7 and concrete slab or beam 15, Fig. 9 is that the side wall construction of body of heater 3 is formed synoptic diagram.
Embodiment
Embodiment one: combine Fig. 1~Fig. 6 and Fig. 8 that this embodiment is described; This embodiment comprises reaction frame 1; Reaction frame 1 is made up of four root post 1-1, two counter-force longeron 1-2 and at least one counter-force crossbeam 1-3; The two ends of every counter-force longeron 1-2 are affixed through high-strength bolt with the side end face of two root post 1-1 respectively; Counter-force crossbeam 1-3 is between two counter-force longeron 1-2, and the position of counter-force crossbeam 1-3 can be regulated along counter-force longeron 1-2 according to the position of required load application of test or counter-force constraint, and the two ends of counter-force crossbeam 1-3 are affixed through high-strength bolt with two counter-force longeron 1-2 respectively; It comprises that also at least one displacement measuring device 2, at least two strides body of heater 3, test specimen bearing 4, at least one LOAD CELLS 5, at least one lifting jack 6, at least three roller bearings 7, at least two nozzles 8, oil pump 9, fuel tank 10, blower fan 11 and at least four thermopairs 12; The inner chamber of test specimen bearing 4 laterally is provided with at least one and isolates bearing 4-1, and isolation bearing 4-1 is divided into two with the inner chamber of test specimen bearing 4 and strides bearing inner chamber 4-2, whenever strides to be provided with one among the bearing inner chamber 4-2 and to stride body of heater 3; The transversely end face of whenever striding bearing is provided with a roller bearing 7; Four root post 1-1 on the reaction frame 1 are arranged on the peripheral ground of test specimen bearing 4, and displacement measuring device 2 is made up of two anchor pole 2-1, vertical pole 2-2 and at least one displacement meter 2-3, and vertical pole 2-2 two ends are packed in the top of two anchor pole 2-1 through buckle; At least one displacement meter 2-3 is packed on the vertical pole 2-2 through buckle; The quantity of displacement meter 2-3 can increase and the position can be according to the measuring point flexible arrangement according to the measurement needs, and displacement measuring device 2 is arranged on the body of heater 3 and two anchor pole 2-1 are arranged on the ground, vertical two outside of reaction frame 1, is provided with at least one LOAD CELLS 5 below the counter-force crossbeam 1-3; Be provided with lifting jack 6 below the LOAD CELLS 5; The longitudinal side wall of whenever striding the test specimen bearing 4 that body of heater 3 is adjacent is provided with at least one spout 3-1, and nozzle 8 is arranged on spout 3-1 place, and the output terminal of oil pump 9 is connected with nozzle 8; The input end of oil pump 9 is connected with fuel tank 10; Blower fan 11 is communicated with spout 3-1, and the lower sidewall of whenever striding the test specimen bearing 4 that body of heater 3 is adjacent is provided with flue 3-2, and the side wall upper part of whenever striding the test specimen bearing 4 that body of heater 3 is adjacent is provided with at least two thermopairs 12.Body of heater 3 plays the effect of heat-insulation and heat-preservation; Counter-force longeron 1-2 and counter-force crossbeam 1-3 can be joist steel, steel plate, square steel or angle steel; Lifting jack 6 can be regulated the size of load application or constraint reaction; LOAD CELLS 5 is connected with automatic data acquisition equipment; Through the variation of LOAD CELLS measurement data, in can obtaining testing to the variation of the constraint reaction at the load application of member or its bearing place; Four thermopairs 12 are used for measuring the temperature in the body of heater 3, and can measure the temperature in the body of heater 3 accurately, and thermopair 12 connects through the lead harvester, and give computer processing system with electrical signal transfer; Displacement meter 2-3 links to each other with data acquisition system (DAS) and computer processing system through data line, so just can gather and write down test figure in real time, obtains the distortion situation of test specimen relevant position in the process of the test; Flue 3-2 is connected to outdoor chimney, to play the effect of smoke evacuation; Body of heater 3, oil pump 9, fuel tank 10 and blower fan 11 constitute temperature elevation system, and temperature elevation system is that beams of concrete or plate 15 provide calory burning, and simulated fire environment, body of heater 3 are highly unsuitable too high; Test specimen bearing 4 provides support for beams of concrete or plate 15; Displacement meter 2-3 is used for measuring the distortion situation of beams of concrete in the process of the test or plate 15; 1 pair of beams of concrete of reaction frame or plate 15 apply the desired vertical load of test or test specimen bearing 4 places are carried out counter-force constraint, the bearing that the simulation test member is required or the constraint condition of boundary; The size and the situation of change of LOAD CELLS 5 energy measurement constraint reactions or load application.The size of unit body of heater and body of heater number can be selected according to the actual needs of beams of concrete or plate 15; Each unit body of heater both can work alone; Can work simultaneously again; So both can carry out single span, and also can carry out the concrete continuous beam of multispan or the anti-fire test of plate and simulate the not situation of catching fire of chummery, have certain versatility.
Embodiment two: combine Fig. 1, Fig. 5 and Fig. 6 that this embodiment is described, the last plane of the body of heater 3 of this embodiment is lower than the last plane of test specimen bearing 4.Design can guarantee that test specimen has enough deformation spaces like this.
Embodiment three: combine Fig. 9 that this embodiment is described; Inboard wall of furnace body is built by laying bricks or stones by refractory brick and is formed around the body of heater 3 of this embodiment; Furnace body outer wall is built by laying bricks or stones by ordinary red brick and is formed around the body of heater 3; Fill refractory fibre between inboard wall of furnace body and the outer wall around the body of heater 3, the bottom of body of heater 3 is built by laying bricks or stones by two-layer refractory brick and is formed.Design makes body of heater 3 high insulating effect like this, and simple in structure, cost is low.
Embodiment four: combine Fig. 4 and Fig. 7 that this embodiment is described, the upper surface of whenever striding the test specimen bearing 4 that body of heater 3 is adjacent of this embodiment longitudinally is provided with test flume 3-4.When carrying out beams of concrete 15 tests, can beams of concrete 15 be placed among the test flume 3-4, make three faces of beams of concrete 15 can both receive fire, receive condition of a fire condition thereby simulate its three face, the data that test is gathered are more accurate.
Embodiment five: combine Fig. 6 and Fig. 7 that this embodiment is described, this embodiment with the difference of embodiment five is: it also increases has gate sheet 13, and gate sheet 13 is installed in the exit of flue 3-2.Gate sheet 13 is in order to regulate furnace temperature and furnace pressure.Other composition and annexation are identical with embodiment five.
Embodiment six: combine Fig. 3 that this embodiment is described; The end face that the every counter-force longeron 1-2 of this embodiment is connected with counter-force crossbeam 1-3 is provided with some first connecting hole 1-2-1, and the end face that every counter-force crossbeam 1-3 is connected with counter-force longeron 1-2 is provided with some second connecting hole 1-3-1.Design makes the position of counter-force longeron 1-2 and counter-force crossbeam 1-3 to carry out free adjustment according to the position that the required vertical load that applies of test component or test specimen bearing 4 places need retrain like this, has interchangeability.
During test, carry out the beams of concrete of fire test or the size of plate 15 at first as required and build body of heater 3 and test specimen bearing 4, with nozzle 8, oil pump 9, fuel tank 10 and blower fan 11 assemblings; When test concrete slab 15, concrete slab is located on the furnace roof, like this, whole furnace roof is covered by concrete slab, receives the situation of fire with simulation concrete plate single face; When the test beams of concrete, beams of concrete 15 is located among the test flume 3-4, the furnace roof that exposes around the test beam is covered by flame-retardant fibre board 16, and is as shown in Figure 7, receives the situation of fire with simulation concrete beam three faces; Displacement measuring device 2 is installed afterwards; Reaction frame 1, LOAD CELLS 5 and lifting jack 6 are installed in the counter-force constraint that vertical load that applies according to beams of concrete or 15 requirements of plate at last and bearing place need; In order to apply vertical load and the bearing place is carried out counter-force constraint, so just can carry out concrete continuous beam on many supports or anti-fiery test of plate under the various working conditions.
Principle of work: light diesel acted as a fuel pack in the fuel tank 10; Deliver to nozzle 8 through oil pump 9, fuel oil mixes the back atomizing at spout 3-1 place with the pressure air that blower fan 11 is sent into, and before spout 3-1, is lighted; The tongues of fire spray in the body of heater 3; Temperature in the body of heater 3 utilizes thermopair 12 to measure, and thermopair 12 is given computer processing system through electric signal with the temperature transfer in the body of heater 3, through obtaining variation of temperature curve in the trial furnace after the Computer Processing.

Claims (3)

1. the anti-fire test device of concrete continuous beam on many supports or plate; It comprises reaction frame (1); Reaction frame (1) is made up of four root posts (1-1), two counter-force longerons (1-2) and at least one counter-force crossbeam (1-3); The two ends of every counter-force longeron (1-2) are affixed with the side end face of two root posts (1-1) respectively; Counter-force crossbeam (1-3) is positioned between two counter-force longerons (1-2), and the two ends of counter-force crossbeam (1-3) are affixed with two counter-force longerons (1-2) respectively, it is characterized in that: it comprises that also at least one displacement measuring device (2), at least two strides body of heater (3), test specimen bearing (4), at least one LOAD CELLS (5), at least one lifting jack (6), at least three roller bearings (7), at least two nozzles (8), oil pump (9), fuel tank (10), blower fan (11) and at least four thermopairs (12); The inner chamber of test specimen bearing (4) laterally is provided with at least one and isolates bearing (4-1); An isolation bearing (4-1) is divided into two with the inner chamber of test specimen bearing (4) and strides bearing inner chamber (4-2), whenever strides to be provided with one in the bearing inner chamber (4-2) and to stride body of heater (3), and the transversely end face of whenever striding bearing is provided with a roller bearing (7); Four root posts (1-1) on the reaction frame (1) are arranged on the peripheral ground of test specimen bearing (4); Displacement measuring device (2) is made up of two anchor poles (2-1), vertical pole (2-2) and at least one displacement meter (2-3), and vertical pole (2-2) two ends are packed in the top of two anchor poles (2-1), and at least one displacement meter (2-3) is packed on the vertical pole (2-2); Displacement measuring device (2) is arranged on the body of heater (3) and two anchor poles (2-1) are arranged on the ground, vertical two outside of reaction frame (1); Be provided with at least one LOAD CELLS (5) below the counter-force crossbeam (1-3), be provided with lifting jack (6) below the LOAD CELLS (5), the longitudinal side wall of whenever striding the test specimen bearing (4) that body of heater (3) is adjacent is provided with at least one spout (3-1); Nozzle (8) is arranged on spout (3-1) and locates; The output terminal of oil pump (9) is connected with nozzle (8), and the input end of oil pump (9) is connected with fuel tank (10), and blower fan (11) is communicated with spout (3-1); The lower sidewall of whenever striding the test specimen bearing (4) that body of heater (3) is adjacent is provided with flue (3-2); The side wall upper part of whenever striding the test specimen bearing (4) that body of heater (3) is adjacent is provided with at least two thermopairs (12), and the last plane of body of heater (3) is lower than the last plane of test specimen bearing (4), and inboard wall of furnace body is built by laying bricks or stones by refractory brick and formed around the body of heater (3); Furnace body outer wall is built by laying bricks or stones by ordinary red brick and is formed around the body of heater (3); Fill refractory fibre between inboard wall of furnace body and the outer wall around the body of heater (3), the bottom of body of heater (3) is built by laying bricks or stones by two-layer refractory brick and is formed, and the upper surface of whenever striding the test specimen bearing (4) that body of heater (3) is adjacent longitudinally is provided with test flume (3-4).
2. the anti-fire test device of concrete continuous beam on many supports according to claim 1 or plate is characterized in that: it also contains gate sheet (13), and gate sheet (13) is installed in the exit of flue (3-2).
3. the anti-fire test device of concrete continuous beam on many supports according to claim 1 or plate; It is characterized in that: the end face that every counter-force longeron (1-2) is connected with counter-force crossbeam (1-3) is provided with some first connecting holes (1-2-1), and the end face that every counter-force crossbeam (1-3) is connected with counter-force longeron (1-2) is provided with some second connecting holes (1-3-1).
CN2008102095744A 2008-11-28 2008-11-28 Fire-proof test device of concrete multi-span continues beam or plate Expired - Fee Related CN101408536B (en)

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CN101696888B (en) * 2009-10-23 2011-02-09 中国科学技术大学 Simulation experiment device of fire disaster on external wall face of urban building
CN104215653B (en) * 2014-08-25 2017-04-19 中国矿业大学 System for testing fire resistance of reinforced concrete plate under effect of boundary restriction by utilizing jack
CN105841492B (en) * 2016-03-28 2017-10-31 同济大学 A kind of assembled resistance furnace that can be with heated structure cooperative transformation
CN106770903B (en) * 2017-01-06 2019-03-29 中国矿业大学 A kind of Combined frame structure Fire-resistance test system and test method
CN107167368B (en) * 2017-05-16 2023-03-10 华侨大学 Concrete column pseudo-static test device after non-peripheral fire and implementation method thereof
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