CN107655747A - Concrete sample high temperature pulling test device and its fire disaster simulation system - Google Patents

Concrete sample high temperature pulling test device and its fire disaster simulation system Download PDF

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Publication number
CN107655747A
CN107655747A CN201711217231.8A CN201711217231A CN107655747A CN 107655747 A CN107655747 A CN 107655747A CN 201711217231 A CN201711217231 A CN 201711217231A CN 107655747 A CN107655747 A CN 107655747A
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CN
China
Prior art keywords
fire disaster
disaster simulation
test
test specimen
fire
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Pending
Application number
CN201711217231.8A
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Chinese (zh)
Inventor
高丹盈
汤寄予
李庆斌
杨林
曹明兰
杨淑慧
吕铭艳
韩德丰
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Zhengzhou University
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Zhengzhou University
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Priority to CN201711217231.8A priority Critical patent/CN107655747A/en
Publication of CN107655747A publication Critical patent/CN107655747A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/18Performing tests at high or low temperatures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014Type of force applied
    • G01N2203/0016Tensile or compressive
    • G01N2203/0017Tensile
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/022Environment of the test
    • G01N2203/0222Temperature
    • G01N2203/0226High temperature; Heating means

Abstract

The present invention relates to concrete sample high temperature pulling test device and its fire disaster simulation system, wherein fire disaster simulation system, fire disaster simulation stove including supporting mechanism and on supporting mechanism, fire disaster simulation stove is to be formed by connecting by the big en cylindrical shell of two grades by articulated structure and lockset, en cylindrical shell surrounds the hollow space after fire disaster simulation stove and forms burner hearth for placing concrete tensioning test specimen, en cylindrical shell sets heat mechanism, the joint face of en cylindrical shell forms seam, the middle part of seam expands the deformation measurement seam to be formed and be used for deformation-sensor fixture;Concrete sample high temperature pulling test device includes fire disaster simulation system.The fire disaster simulation system design of the present invention is ingenious, hinge lock construction causes burner hearth opening to remain to make test specimen test section be put into burner hearth when being less than test specimen stand under load section, improves the efficiency of heating surface to test specimen test section, reduces the adverse effect that fire disaster simulation cost and simulated fire are brought to specimen holder fixture and surrounding environment.

Description

Concrete sample high temperature pulling test device and its fire disaster simulation system
Technical field
The present invention relates to the fire disaster simulation system in mechanical performance of concrete experimental test field and use the fire disaster simulation The concrete sample high temperature pulling test device of system.
Background technology
With the acceleration of socio-economic development and Development of China's Urbanization, skyscraper develops rapidly, and fire problem becomes increasingly conspicuous, And cause heavy economic losses and casualties.In skyscraper, reinforced concrete structure accounts for more than 90%, as main knot A series of changes will occur for the concrete of structure material mechanical property in high temperature of fire and after high temperature, under intensity and modulus of elasticity Drop, deformation increase etc..Load-bearing and support system of the structure as building, it is necessary to keep enough carryings over a period to come Power, to make disaster affected people safe escape, fire fighter is put out a fire and given first aid to casualty etc..Therefore, set from building safety Fire prevention and control are effectively carried out in terms of meter, must just further investigate the performance degradation rule of the structural materials such as Concrete Subjected To Fire, As to concrete structure and its material, service ability carries out the leading indicator of Scientific evaluation and performance study under fire, and Establish concrete structure fire resistant design method and establish overdo damages of concrete structures assess and restoring and fastening method it is important Descending branch after foundation, particularly concrete in tension strain-stress relation peak point(Or softening section), for concrete structure Fire-resistance analysis, section stress analysis, damage under Fire Conditions analyzed with fracture mechanism and the ductility of anti-seismic structure with it is extensive Multiple force characteristic research etc. can provide important basic foundation.However, due to the complexity of concrete direct tensile test, for a long time Since scientific research personnel tensile property in concrete high temperature of fire can be seldom recognized by direct tensile test.
Publication No. CN105424498A Chinese patent disclose in a kind of concrete material high temperature compression testing machine and Method for compression test, Publication No. CN105403467A Chinese patent disclose in high temperature splits in a kind of concrete material high temperature Drawing to split in testing machine and high temperature draws test method, Publication No. CN105547856A Chinese patent to disclose a kind of concrete material Expect that bend test method, the common traits of three inventions are in Apparatus for Bending at low-temp and high temperature in high temperature:The coagulation in high temperature is carried out During native stress test, whole concrete sample and partially or completely loads fixture will be positioned in heating device, this for All it is feasible to press to the resistance to compression of force, split drawing and bend test, but fire is carried out to concrete according to identical scheme Axial tension test in high temperature is then difficult to, and the loads fixture for meeting to require can not be prepared by essentially consisting in.It is open Number disclose a kind of concrete direct tensile test test specimen, specimen molding mould and complete for CN106018044A Chinese patent Device, the concrete direct tensile test test specimen of the invention is square section equal thickness dumbbell shape tensile test piece, to realize to the examination Part carries out effective tensioning, has invented corresponding test specimen tensioning clamping fixture, test piece deformation test fixture and data collecting system.Should Although invention meets the needs that concrete direct tensile test is carried out under normal temperature condition, it can not be directly used in high temperature and mix The tensile property test of soil is coagulated, it is straight can not to be put into progress in existing high-temperature service for the particularly test specimen of the invention and its tension clamp Tension test is connect, or still lacks suitable fire disaster simulation system for existing tensioning test specimen and its tension clamp, therefore, to obtain Concrete material uniaxial direct tensile behavior at high temperature comprehensive test data, it is necessary to prior art is changed.
The content of the invention
It is an object of the invention to provide a kind of fire disaster simulation system, to solve concrete sample high temperature in the prior art Experimental rig is drawn to lack the technical problem of suitable fire disaster simulation system;The present invention also aims to provide one kind to have fire mould The concrete sample high temperature pulling test device of plan system.
In order to solve the above technical problems, the technical scheme of fire simulation system is as follows in the present invention:
Fire disaster simulation system, including supporting mechanism and the fire disaster simulation stove on the supporting mechanism, the fire disaster simulation stove It is to be formed by connecting by the big en cylindrical shell of two grades by articulated structure and lockset, the articulated structure is positioned at described in two The side of en cylindrical shell, the lockset is positioned at the opposite side of two en cylindrical shells, two half square column types Housing surrounds the hollow space after fire disaster simulation stove and forms burner hearth for placing test specimen, and the en cylindrical shell sets heat Mechanism, the joint face of two en cylindrical shells form seam, and the middle part of the seam expands to be formed for deformation-sensor The deformation measurement seam that fixture uses.
The en cylindrical shell includes shell, and ecto-entad is set gradually heat-insulated between the shell and the burner hearth Layer, heat-insulation layer and fire disaster simulation chamber, the fire disaster simulation chamber are made up of refractory material, and the heat mechanism is heating tube, described Heating tube is located in the fire disaster simulation chamber, and the heating tube is connected by wire with controller.
The burner hearth is symmetrically positioned about multiple temperature sensors, the temperature sensor peripheral hardware protection pipe, the temperature Sensor is connected by wire with the controller.
Edge patch high temperature resistant blanket on the face of the seam.
The lateral cross section of the burner hearth is shaped as rectangle, and size is more than the power transmission section of test specimen, and longitudinal length is longer than test specimen By the length or suitable by the length of fiery section with test specimen of fiery section.
The supporting mechanism includes rotating shaft and connecting rod, and one end of the connecting rod is fixed on an en cylindrical shell On, the other end is fixed in the rotating shaft by bearing, and the rotating shaft is by bearing setting connecting rod, the connecting rod and to examination The experiment machine frame that part applies tensile load is connected.
The pulley for support limit spring is equipped with four angles of the shell.
Concrete sample high temperature pulling test device, including the fire disaster simulation system, in addition to a pair of specimen holder folders Tool and cooling system.
The specimen holder fixture include laterally set girder, be vertically provided on girder a pair of scapulets, in eight Angularly disposed a pair of the card beams on scapulet of word and the backboard located at girder and scapulet the same side, the girder, scapulet, card beam And backboard forms the square taper neck for clamping test pieces stand under load section, the loading surface of the card beam and the stand under load of test specimen stand under load section Face is bonded completely.
The cooling system includes water cooling unit, outlet pipe and return pipe, and water cooling unit connects institute with return pipe by outlet pipe State the water inlet and delivery port of water-circulating pipe in specimen holder fixture.
Beneficial effects of the present invention are:In use, the big en cylindrical shell of two grades of fire disaster simulation stove is opened, will try Part is put into centre, then rotate en cylindrical shell, make test specimen by fiery section just in burner hearth, locked by lockset, become Shape sensor stitches from deformation measurement to be inserted and props up the test section of test specimen, then passes through heat mechanism heats test specimen, you can carry out The direct tensile test of concrete sample in high temperature.The fire disaster simulation system design is ingenious, and articulated structure make it that burner hearth opening is small Remain to make test specimen test section be put into burner hearth when test specimen stand under load section, not only increase the efficiency of heating surface to test specimen test section, drop The low cost of fire disaster simulation, also reduces the adverse effect that simulated fire is brought to specimen holder fixture and surrounding environment.
Further, ecto-entad sets gradually thermal insulation layer, heat-insulation layer and fire between the shell and burner hearth of fire disaster simulation stove Calamity simulates chamber, prevents heat to scatter and disappear, quick heating, the heating tube controlled using controller, can accurately be controlled according to test requirements document Test temperature.
Further, burner hearth be symmetrically positioned about it is multiple be connected temperature sensor with controller, can be with real-time monitoring hearth Temperature, undesirable temperature environment can be intervened in time.
Further, supporting mechanism includes rotating shaft and connecting rod, and one end of connecting rod is fixed on an en cylindrical shell, separately One end is fixed in rotating shaft by bearing, and such fire disaster simulation stove can be removed completely when needed, add convenience.
The specimen holder fixture of concrete sample high temperature pulling test device, easily the stand under load section of test specimen can be caught in In square taper neck, the loading surface of card beam and being bonded completely by section for test specimen stand under load section, backboard is while clamping stand under load section Also act as reinforcing clip beam action.
Further, the card beam in specimen holder fixture, particularly specimen holder fixture is cooled, and prevents card beam to be heated Deform and influence experiment.
Brief description of the drawings
Fig. 1 is the use state figure of fire simulation system one embodiment in the present invention;
Fig. 2 is the cooperation schematic diagram of deformation-sensor fixture and deformation-sensor in Fig. 1;
Fig. 3 is Fig. 2 top view;
Fig. 4 is the cooperation schematic diagram of deformation measuring system and fire disaster simulation stove in Fig. 1;
Fig. 5 is the structural representation of concrete sample in Fig. 1;
Fig. 6 is Fig. 5 top view;
Fig. 7 is the structural representation of upper specimen holder fixture in Fig. 1;
Fig. 8 is Fig. 7 top view;
Fig. 9 is the structural representation of fire disaster simulation stove in Fig. 1;
Figure 10 is Fig. 9 side view;
Figure 11 is Fig. 9 top view.
Embodiment
First, it is emphasized that in the present invention, test specimen refers to concrete sample, and test specimen 6 uses " I " character form structure, such as schemed 5th, shown in Fig. 6, it is divided into from middle part to both ends by fiery section A1, power transmission section A2 and stand under load section A3, is included test section by fiery section A1 A0.It is used to simulate the fire effect being subjected to by fiery section A1;Test section A0 is also predetermined Fault Segment, for intensity and deformation performance Test;Power transmission section is used to provide enough spaces for test operation;Stand under load section A3 is used for the application of stretching force.To avoid variable cross-section Cambered surface mistake of the radius for R is used between the stress concentration at place, test section A0 and power transmission section A2, power transmission section A2 and stand under load section A3 Cross.To ensure that the destruction of test specimen occurs in the minimum test section A0 in section, the section of test specimen gradually increases from test section A0 2R To stand under load section A3 4R.Length, width and the thickness of the test section A0 is equal to 2R, and for ease of test specimen moulding by casting, Each section of thickness is equal to 2R.It is in axially 45 degree of angles that stand under load section A3 is provided with test specimen close to the cambered surface transition position with power transmission section A2 By section.
The embodiment of concrete sample high temperature pulling test device, as shown in Fig. 1~11, including tensioning system, cooling system System, fire disaster simulation system, deformation measuring system, control and data actuation.
Wherein, fire disaster simulation system, as shown in Fig. 1, Fig. 4, Fig. 9, Figure 10, Figure 11, including fire disaster simulation stove 5 and its support Mechanism etc..Fire disaster simulation stove is to be formed by connecting by the big en cylindrical shell of two grades by articulated structure and lockset C11, described For articulated structure positioned at the side of two en cylindrical shells, the lockset is another positioned at two en cylindrical shells Side, in the present embodiment, articulated structure is hinge C6, two en cylindrical shell symmetrical configurations, is formed by shell C1 and goes along with sb. to guard him bone Frame, shell are made of stainless steel.Its hollow space forms burner hearth after two en cylindrical shells are linked to be overall fire disaster simulation stove 5 C5.Thermal insulation layer C2, heat-insulation layer C3 and fire disaster simulation chamber C4 are set gradually between the shell C1 and burner hearth C5 of fire disaster simulation stove.Thermal insulation layer It is made up of heat-resisting heat-barrier material, nanoporous aerogel composite adiabatic felt can be used, for preventing heat to scatter and disappear.Heat-insulation layer can use nothing Prepared by machine flame-proof thermal insulation material, such as mineral wool, rock wool, mineral wool, aluminium silicate wool, ceramic fibre, for insulation.Fire Simulation cavity wall is made up of refractory material, heating pipe built-in C9, and simulation generation fire, heating tube is connected by wire with controller. To measure the temperature in burner hearth C5, multiple temperature sensor C8, the protection of temperature sensor peripheral hardware are symmetrically positioned about in burner hearth C5 Pipe, temperature sensor are connected by wire with controller.The joint face of two en cylindrical shells forms seam C7, seam C7 One layer of high temperature resistant blanket of edge patch on face, prevents scattering and disappearing for heat in hot test.Seam C7 middle part expands to form deformation survey Amount seam C12, the size of the deformation measurement seam should meet needs of the deformation-sensor fixture 13 to working space.The transverse direction of burner hearth Cross sectional shape is rectangle, and size is slightly larger than the power transmission section A2 of test specimen 6, longitudinal length and test specimen by fiery section B1 length it is suitable or Bigger, such structure type not only guarantees to meet test requirements document, is also more conducive to be applied test specimen by fiery section A1 the fire of simulation Calamity acts on.Supporting mechanism is a set of movable device being made up of rotating shaft E2 and connecting rod E3 etc., and connecting rod E3 one end is fixed on en On the shell C1 of cylindrical shell, the other end is fixed on rotating shaft E2 bearing, rotating shaft E2 by bearing and another connecting rod with it is right The experiment machine frame that test specimen 6 applies tensile load is connected, and the rotation for driving the E2 around the shaft of fire disaster simulation stove 5 by connecting rod E3 is realized Displacement to fire disaster simulation stove 5.When needing to carry out fire smoldering test to test specimen, E2 rotates the court of fire disaster simulation stove 5 around the shaft To test specimen 6 by fiery section A1, two half shells of fire disaster simulation stove 5 are opened along hinge C6, burner hearth C5 is just surrounded test specimen 6 By fiery section A1, lock fire disaster simulation stove 5 with lockset C11, after the contact site of burner hearth and test specimen is closed with fire resisting blanket i.e. The fire effect of simulation can be applied to test specimen according to the program of setting.It is equipped with shell C1 four angles for support limit bullet The pulley C10 of spring, pulley is used to support the first limit spring E1, the second limit spring E4, and avoids bringing deformation measurement value Error.
Wherein, tensioning system includes load bar 1, load transducer 2, ball pivot connecting rod 3, specimen holder fixture 4 etc..
Specimen holder fixture 4 uses in pairs, as shown in Fig. 1, Fig. 7 and Fig. 8, clamps the stand under load section at the both ends of test specimen 6 respectively A3 forms stretching force.Specimen holder fixture forms according to the structure type and dimensioned of the end of test specimen 6, specimen holder fixture bag Include the girder B1 laterally set, be vertically provided at a pair of scapulet B4, angularly disposed in scapulet B4 in eight words at girder B1 both ends On a pair of card beam B5 and the backboard B3 located at girder B1 and scapulet B4 the same sides, girder B1, scapulet B4, card beam B5 and the back of the body Plate B3 forms the square taper neck for clamping test pieces stand under load section, is installed for ease of test specimen, the chi of side's tapered opening neck The very little stand under load section A3 more than test specimen 6.Girder center is provided with ball pivot nest B2, ball pivot nest and the shape of ball pivot connecting rod 3 by the side of test specimen 6 Into spherical pair.The ball pivot nest center line formed after card beam B5 medial surface and two clamping test pieces 6 of specimen holder fixture 4 is in 45 degree Angle, and the loading surface for clamping card beam B5 should be bonded completely with test specimen 6 by section.One specimen holder fixture 4 is logical during use Cross ball pivot connecting rod 3 to be connected with load transducer 2, load transducer 2 passes through load bar 1 and the jaw or tensioning interface of testing machine again Connection, another specimen holder fixture 4 are connected completion directly by ball pivot connecting rod 3 to examination with the jaw or tensioning interface of testing machine The tensioning of part 6.Test specimen makes mould should be inclined by section with loads fixture card beam B5 loading surface in corresponding test specimen stand under load section A3 Angle is completely the same.The uniformity of the setting of spherical pair and test specimen and loads fixture contact surface can ensure not cause in tensioning test specimen Moment of flexure, moment of torsion and stress concentration are produced at test specimen variable cross-section, improves success of the test rate.The card beam B5 that is directly contacted with test specimen 6 and Interconnected water-circulating pipe B6 is set in backboard B3, and the water-circulating pipe is provided with water inlet and delivery port.
Cooling system is as shown in Fig. 1 Fig. 7, including water cooling unit 9, outlet pipe 10 and return pipe 11 etc..Cooling-water machine 9 passes through water outlet Pipe 10 and return pipe 11 connect the water inlet and delivery port of water-circulating pipe B6 in specimen holder fixture 4.The water cooling unit is a kind of It is integrated with including parts such as water pump, water tank, evaporator, compressor, pressure controller, filter, reservoir, condenser, fans Air cooling refrigeration machine.Water pump is connected with outlet pipe 10, and temperature sensor is set in return pipe 11, and temperature sensor passes through signal Line is connected with controller 8.The water pump is variable ratio frequency changer centrifugal pump, and when the return water temperature of measurement is less than design temperature, water pump is with low Frequency is run, when higher than design temperature, increasing water pump operation frequency gradually, when water pump operation frequency reaches capacity or temperature is higher than setting When constant temperature degree adds bandwidth, start water cooling unit 9, in test rigidity is unaffected to ensure specimen holder fixture 4.
Control and data actuation are made up of load transducer 2, manipulation screen 7, controller 8, deformation-sensor 12 etc..Controller Pass through cable and load transducer 2, deformation-sensor 12, manipulation screen 7, cooling-water machine 9, fire disaster simulation stove 5 and testing machine etc. respectively It is connected.By the control of program and the realization of manipulation screen 7 to tensile load, fire disaster simulation in-furnace temperature, cooling-water machine etc. and to opening Draw the collection of the parameters such as load, test piece deformation, temperature.
Deformation measuring system is as shown in Fig. 1~10:Deformation measuring system is divided into fire disaster simulation stove when including using for a pair Deformation-sensor fixture 14, deformation-sensor 12, band top plate supporting rod 13, pulley C10 and limit spring E1 of both sides etc..Deformation Clamp of sensor 14 includes the elastic component D1 of arcuate structure, and elastic component D1 one end is provided with deformation-sensor fixed seat, elasticity The other end of part is provided with band top plate supporting rod fixed seat, and deformation-sensor fixed seat, band top plate supporting rod are consolidated in the present embodiment Reservation is the ferrule D3 locked by screw D2, and deformation-sensor fixed seat is used to clamp deformation-sensor 12, band top plate Supporting rod fixed seat is used for clamping band top plate supporting rod 13, and the measure-ball of deformation-sensor withstands on the top with top plate supporting rod 13 On plate.The first measurement bar 15 is provided with deformation-sensor fixed seat, is provided with band top plate supporting rod fixed seat and is surveyed with first Second measurement bar 16 of the corresponding arrangement of gauge rod 15, each measurement bar is by fixed seat one end to distally successively including main limb D4 and fire resisting nail D13, the measurement end of measurement bar are followed closely for fire resisting, and fire resisting nail D13 is made up of refractory material.Main limb includes square-section section and cylinder Section, using circular baffle ring as boundary, fire resisting nail is connected with the clamping of cylindrical cross-section section for the two, and fire resisting nail D13 tries with tension test One end end of part contact is taper(Or blade-like), slipped for being accurately positioned and preventing.The main limb of each measurement bar is each in opposite directions Stretch out a trigger limb D12, the end of each trigger limb separates two lock pins, and two lock pins in the first measurement bar are referred to as the One the first lock pin of measurement bar and first the second lock pin of measurement bar, two lock pins in the second measurement bar are referred to as the second measurement bar first Lock pin D6 and second the second lock pin of measurement bar D14.It is provided with the square-section section of each main limb of measurement bar and is worn for corresponding lock pin The lockpin hole D9 gone out, corresponding to first the first lock pin of measurement bar and the second lock pin be the first lockpin hole in the second measurement bar and Second lockpin hole, what it is corresponding to second measurement bar the first lock pin D6 and the second lock pin D14 is the first lock pin in the first measurement bar Hole and the second lockpin hole.First the first lock pin of measurement bar can extend and retract corresponding in the second measurement bar in the first lockpin hole And the grab D7 that the limit spring E1 with being set on rear side of lower section is connected is used cooperatively, first the second lock pin of measurement bar can be surveyed second Extend and retract in the second lockpin hole corresponding on gauge rod and be used cooperatively with the sleeve buckle D8 of the second measurement bar, the first measurement The first measurement rod sleeve D11, the second measurement bar and trigger are arranged with bar in the cylindrical cross-section section adjacent with the second lockpin hole The second measurement rod sleeve D11 is arranged with cylindrical cross-section section adjacent limb D12.The cylindrical cross-section section of measurement bar is arranged disengagement Spring D10, the disengagement spring are arranged in the sleeve, and one end and sleeve connection, the other end are fixed on back-up ring.Each deformation Limit spring attachment structure is provided with the measurement bar of clamp of sensor, limit spring attachment structure is spring in the present embodiment Hanging hole D5, hanging hole D5 the first limit springs of connection E1 of the first measurement bar one end on the deformation-sensor fixture of left side, the first limit Position spring E1 is taken across in two pulley C10 of the back upper place of fire disaster simulation stove 5 stopper slot, the grab D7 that the other end passes through connection It is stuck on the first lock pin D6 of right side deformation-sensor fixture the second measurement bar trigger limb;First on the deformation-sensor fixture of right side Hanging hole D5 the second limit springs of connection E4 of measurement bar one end, the second limit spring E4 are taken across the front upper place of fire disaster simulation stove 5 Two pulley C10 stopper slot in, the other end is stuck in left side deformation-sensor fixture second by the grab D7 of connection and measured On first lock pin D6 of bar trigger limb.The measurement bar of deformation-sensor fixture second of left and right two is also by front and rear two limit springs It is attached with two sets of hanging hole coupler constructions.
When testing test piece deformation, two deformation-sensors are used cooperatively in pairs, are pressed from both sides by deformation-sensor 12 and with top plate Bar 13 is held on the deformation-sensor fixture 14, adjustment deformation-sensor senses the deformation in testing range The fire resisting nail D13 of device fixture 14 is clamped on the test section A0 of test specimen 6, and the first limit spring E1 one end is articulated in into a set of change On the hanging hole D5 of shape clamp of sensor 14, limit spring is around the pulley C10 on fire disaster simulation stove 5, other end mounting snap fit D7 It is stuck on lock pin D6, the second limit spring E4 is completed to same connection.Under the coupling of fire and load, deformation sensing Device fixture 14 can synchronously deform with test specimen test section A0 and deformation values are passed into deformation-sensor 12, the first measurement bar, second Measurement bar starts to be in splayed, and when test piece deformation no to scale or test specimen fracture, fire resisting nail D13 is finally made by displacement transfer Sponsons of the trigger limb D12 with pendulum lock pin D6 is returned in lockpin hole D9, and snap fit D7 and sleeve buckle D8 and disengaged with lock pin D6, Disengage spring D10 to disengage deformation-sensor fixture 14 from test specimen 6, to deformation-sensor 12 and the shape of deformation-sensor fixture 14 Protected into one kind.In other embodiments of the invention:The open slot of test specimen specimen holder fixture can increase dismountable cover plate;Fire Calamity simulation stove profile can change into quantity that is cylindric, or can increasing heat-insulation layer or thermal insulation layer;Deformation-sensor fixture respectively measures The first lock pin, the second lock pin on bar can also be connected directly between on corresponding main limb.

Claims (10)

1. fire disaster simulation system, it is characterised in that:Fire disaster simulation stove including supporting mechanism and on the supporting mechanism, The fire disaster simulation stove is to be formed by connecting by the big en cylindrical shell of two grades by articulated structure and lockset, the be hinged knot Structure positioned at the side of two en cylindrical shells, the lockset positioned at two en cylindrical shells opposite side, two The individual en cylindrical shell surrounds the hollow space after fire disaster simulation stove and forms burner hearth for placing test specimen, half square column Heat mechanism is set in shape housing, and the joint face of two en cylindrical shells forms seam, and the middle part of the seam expands The deformation measurement used for deformation-sensor fixture is formed to stitch.
2. fire disaster simulation system according to claim 1, its spy are:The en cylindrical shell includes shell, described Ecto-entad sets gradually thermal insulation layer, heat-insulation layer and fire disaster simulation chamber between shell and the burner hearth, the fire disaster simulation chamber by Refractory material is made, and the heat mechanism is heating tube, and the heating tube is located in the fire disaster simulation chamber, and the heating tube is led to Wire is crossed to be connected with controller.
3. fire disaster simulation system according to claim 2, it is characterised in that:The burner hearth is symmetrically positioned about multiple temperature Sensor, the temperature sensor peripheral hardware protection pipe, the temperature sensor are connected by wire with the controller.
4. fire disaster simulation system according to claim 1, it is characterised in that:Edge patch refractory wool on the face of the seam Felt.
5. fire disaster simulation system according to claim 1, it is characterised in that:The lateral cross section of the burner hearth is shaped as rectangular Shape, size are more than the power transmission section of test specimen, and longitudinal length is longer than test specimen by the length of fiery section or suitable by the length of fiery section with test specimen.
6. fire disaster simulation system according to claim 1, it is characterised in that:The supporting mechanism includes rotating shaft and connecting rod, One end of the connecting rod is fixed on an en cylindrical shell, and the other end is fixed in the rotating shaft by bearing, institute State rotating shaft and connecting rod is set by bearing, the connecting rod is connected with applying the experiment machine frame of tensile load to test specimen.
7. fire disaster simulation system according to claim 2, it is characterised in that:It is equipped with and is used at four angles of the shell The pulley of support limit spring.
8. concrete sample high temperature pulling test device, it is characterised in that:Including the fire described in claim 1~7 any one Calamity simulation system.
9. concrete sample high temperature pulling test device according to claim 8, it is characterised in that:Also include a pair of test specimens Clamping fixture, the specimen holder fixture include laterally set girder, be vertically provided on girder a pair of scapulets, in eight Angularly disposed a pair of the card beams on scapulet of word and the backboard located at girder and scapulet the same side, the girder, scapulet, card beam And backboard forms the square taper neck for clamping test pieces stand under load section, the loading surface of the card beam and the stand under load of test specimen stand under load section Face is bonded completely.
10. concrete sample high temperature pulling test device according to claim 9, it is characterised in that:Also include cooling system System, the cooling system include water cooling unit, outlet pipe and return pipe, and water cooling unit connects the test specimen with return pipe by outlet pipe The water inlet and delivery port of water-circulating pipe in clamping fixture.
CN201711217231.8A 2017-11-28 2017-11-28 Concrete sample high temperature pulling test device and its fire disaster simulation system Pending CN107655747A (en)

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CN108680440A (en) * 2018-03-19 2018-10-19 北京航空航天大学 High-temperature material Mechanics Performance Testing heating using cold aid mode and measuring system
CN108760466A (en) * 2018-04-20 2018-11-06 中国地质大学(武汉) A kind of elevated temperature strength strain measurement system based on Material Testing Machine
CN110308092A (en) * 2019-08-02 2019-10-08 河南工程学院 A kind of armored concrete adhesive property cupping machine
CN110320111A (en) * 2019-08-02 2019-10-11 河南工程学院 A kind of tension test part, tensile test apparatus and stretching test method
CN110320110A (en) * 2019-08-02 2019-10-11 河南工程学院 A kind of tensile test apparatus and heating device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108680440A (en) * 2018-03-19 2018-10-19 北京航空航天大学 High-temperature material Mechanics Performance Testing heating using cold aid mode and measuring system
CN108760466A (en) * 2018-04-20 2018-11-06 中国地质大学(武汉) A kind of elevated temperature strength strain measurement system based on Material Testing Machine
CN110308092A (en) * 2019-08-02 2019-10-08 河南工程学院 A kind of armored concrete adhesive property cupping machine
CN110320111A (en) * 2019-08-02 2019-10-11 河南工程学院 A kind of tension test part, tensile test apparatus and stretching test method
CN110320110A (en) * 2019-08-02 2019-10-11 河南工程学院 A kind of tensile test apparatus and heating device

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