CN105403467B - It splits to draw in testing machine and high temperature in concrete material high temperature and splits drawing test method - Google Patents
It splits to draw in testing machine and high temperature in concrete material high temperature and splits drawing test method Download PDFInfo
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- CN105403467B CN105403467B CN201510959864.0A CN201510959864A CN105403467B CN 105403467 B CN105403467 B CN 105403467B CN 201510959864 A CN201510959864 A CN 201510959864A CN 105403467 B CN105403467 B CN 105403467B
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- 239000004567 concrete Substances 0.000 title claims abstract description 145
- 238000012360 testing method Methods 0.000 title claims abstract description 91
- 239000000463 material Substances 0.000 title claims abstract description 38
- 238000010998 test method Methods 0.000 title abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 239000000523 sample Substances 0.000 claims description 61
- 238000004826 seaming Methods 0.000 claims description 28
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 239000002689 soil Substances 0.000 description 6
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000008646 thermal stress Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000005588 protonation Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention, which provides to split to draw in testing machine and high temperature in concrete material high temperature, splits drawing test method, wherein, split in concrete material high temperature draw testing machine include for concrete sample apply stressed loading equipemtn, the heating device for heating concrete sample and for measure concrete sample split draw deflection displacement acquisition device.The present invention is combined together the heating device of concrete test and loading equipemtn are ingenious, and it is aided with displacement acquisition device, it forms and can be used for splitting the comprehensive test system for drawing test in concrete sample high temperature, it is synchronous with load to realize heating, can truly in simulated fire high temperature concrete environment, it is very close by splitting the actual Splitting tensile performance of concrete in the test result for drawing testing machine progress concrete material test to obtain and high temperature of fire in this concrete material high temperature, guarantee is provided to study high temperature and the fire resistance of concrete material.
Description
Technical field
The present invention relates to a kind of concrete material testing machine for mechanical properties, especially a kind of to be used for normal concrete, fiber
In the material at high temperature such as concrete, regeneration concrete, high-strength concrete split tensile strength and split draw deformation testing machine；Further relate to coagulation
Split tensile strength and the test method for splitting drawing deformation in the mechanical test method of soil material, especially concrete high temperature.
Background technique
Concrete is that purposes is most wide in engineering construction, the maximum construction material of dosage.In recent years, as concrete material exists
It is high-rise, towering, greatly across etc. particular service requirements and harsh environment application go deep into, to concrete material high temperature fire resistance propose
New requirement, is badly in need of corresponding high-temperature test facility to research and develop the high temperature fire resistance of concrete material.Existing concrete is high
Temperature splits the temperature elevation system for drawing testing equipment and loading system is often to separate, and not can be carried out coagulation in proper high temperature
Native Splitting tensile performance test can only carry out the test of concrete Splitting tensile performance and concrete Splitting tensile performance examination in approximate high temperature after high temperature
It tests.The test of concrete Splitting tensile performance is that concrete material is put into heating device to heat after high temperature, is stopped after reaching target value
Heating is loaded on loading equipemtn after concrete material is cooling.Concrete Splitting tensile performance is tested then in approximate high temperature
It is that after concrete temperature in heating device reaches target value, the condition of high temperature will be in tools such as special high temperature-resistant pliers immediately
Concrete material be put into split draw testing machine on load.It is found in practical application, drawing test is whether split after high temperature, or approximate
High temperature in split drawing test, split in resulting concrete high temperature and draw in test result and high temperature of fire that concrete is actual to split drawing
Can there be larger difference.
In order to solve the above problems, people are seeking always a kind of ideal technical solution.
Summary of the invention
The reason of technical staff passes through prolonged research of technique, and discovery generates the above problem finally.Concrete high temperature is split
The reason of drawing test result to differ greatly with the actual Splitting tensile performance of concrete in high temperature of fire is: drawing is split in concrete high temperature
The temperature elevation system of testing equipment is separated with loading system, can not achieve cooperateing with for heating and load, and concrete tries when load
The different degrees of target temperature being lower than when heating of the temperature federation of part, in temperature-fall period, outside cools down fastly concrete sample,
Internal cooling is slow, to generate thermal stress gradient, causes the stress damage of concrete material, and then makes obtained experimental result and fire
The practical Splitting tensile performance of concrete generates difference in calamity high temperature.Concrete Splitting tensile performance after high temperature is tested, coagulation when load
The temperature of soil is reduced to room temperature, and thermal stress is damaged clearly.Concrete Splitting tensile performance in approximate high temperature is tested, although
Concrete sample from heating device take out after loaded immediately, temperature decline it is less, but due to load when environment temperature
Far below the temperature in heating device, the thermal stress gradient of concrete sample is larger, and thermal stress damage is same very important.It is grinding
During hair, technical staff also encounters a technical problem, i.e. the displacement meter of measurement concrete deformation amount is put into heating device
In can be burned.
In addition, existing in relation to test method standard and specification, concrete material performance (for example, split tensile strength) according to China
It is to be determined according to the test result of lower 3 concrete samples of the same terms, therefore, it is necessary to solve 3 identical concrete samples
Heating problem under same high temperature environment.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that: split in concrete material high temperature drawing examination
Test machine, including for concrete sample apply stressed loading equipemtn, the heating device for heating concrete sample and
The displacement acquisition device of drawing deflection is split for measuring concrete sample；
The loading equipemtn includes pedestal, the column being fixed on the pedestal, is set on the column and along the column
Move up and down and position crossbeam, be fixed on crossbeam bottom top board, be fixed on top board bottom high temperature resistant seaming chuck, set
In the lower platen on the pedestal, the high temperature resistant push-down head on the lower platen, the high temperature resistant on the push-down head
Cushion block and load power source for applying upward active force to the lower platen, the lower end of the high temperature resistant seaming chuck and
The upper end of the high temperature resistant cushion block, which all has to split, draws protrusion；
The heating device include high temperature furnace support frame, the high temperature furnace on the high temperature furnace support frame and be set to high temperature
Heater in furnace, between the top board and the lower platen, the top plate of the high temperature furnace is arranged to be supplied the high temperature furnace
The high temperature resistant seaming chuck is down through the upper perforation inside high temperature furnace, and the bottom plate setting of the high temperature furnace is under the high temperature resistant
Pressure head penetrates the lower perforation inside high temperature furnace upwards, and face is arranged in the vertical direction for the upper perforation and the lower perforation；
The displacement acquisition device includes that two the horizontal displacement meter being set on two columns, acquisition displacement meters are believed respectively
The displacement meter collecting cassette of breath and two guide rod structures, the high temperature resistant guide rod of two guide rod structures is isometric, and the two of the high temperature furnace
The pilot hole passed through there are two being set on side wall for described two high temperature resistant guide rods.
Preferably, the high temperature resistant seaming chuck includes the seaming chuck support being fixedly arranged on the top board and is fixedly arranged on institute
The seaming chuck ontology on seaming chuck support is stated, the high temperature resistant push-down head includes the push-down head branch being fixedly arranged on the lower platen
Seat and the push-down head ontology being fixedly arranged on the push-down head support, corresponding described split draw protrusion to be located at the seaming chuck ontology
On.
Preferably, the column top is equipped with screw thread, and the both ends rotation on the crossbeam is equipped with nut, sets on the crossbeam
There is the motor for driving the two nut rotations, the crossbeam is moved up and down simultaneously by the realization that is threadedly engaged with the column
Positioning.
Preferably, the heating device further includes temperature control system and the temperature sensor in the high temperature furnace, described
Heater is globar, and the temperature control system is connect with the temperature sensor sampling, the temperature control system and the Elema
Electrical connection.
Preferably, the guide rod structure includes set on the high temperature furnace two sidewalls and having the spring base of tension spring, being fixedly arranged on
The outer lateral edge of longitudinal pressing plate on tension spring top and the high temperature resistant guide rod being fixed on the inside of longitudinal pressing plate, the spring base is horizontal
It is equipped with guide slit to direction, the longitudinal direction pressing plate slides in transverse direction to be plugged in the guide slit and the longitudinal direction pressing plate is used for
It presses and cooperates with the probe portion of the corresponding displacement meter.
It preferably, further include pushing meanss include being vertically arranged on the baseplate inner surface of the high temperature furnace and with fire door
High temperature resistant guide rail, the high temperature resistant cushion block on the push-down head ontology, the catch bar that is inserted in high temperature furnace sidewall of sliding
And the power source that the driving catch bar moves back and forth, the bottom of the high temperature resistant cushion block are equipped with sliding with the high temperature resistant guide rail
The sliding slot of dynamic cooperation, the catch bar is for pushing the high temperature resistant cushion block to slide on the high temperature resistant sliding rail.
Preferably, the power source includes electric machine support and the motor on electric machine support, the electric machine support packet
Two horizontally disposed lead screws being set on rear side of the high temperature furnace are included, the screw on motor and the lead screw is drivingly connected, silk
Graduated scale is equipped with by thick stick.
Preferably, splitting on the push-down head, which is drawn, is equipped with high temperature cotton pad block around protrusion.
It preferably, further include computer, the computer is connect for acquiring displacement with the displacement meter collecting cassette information
The displacement signal of meter collecting cassette, the computer and testing machine control box control are connected will pass through testing machine control box control and add
Carry the load signal that power source applies upward active force to the lower platen and receives testing machine control box feedback.
Testing machine is drawn to carry out splitting the method for drawing test in high temperature to concrete using splitting in concrete high temperature, it is characterised in that
Include the following steps:
Test 3 concrete samples used are put on the high temperature resistant cushion block in high temperature furnace, concrete sample two sides
Pad upper high temperature cotton pad block in lower section；
Fire door is opened, the high temperature resistant guide rail in high temperature furnace shifts the high temperature resistant cushion block that 3 are placed with concrete sample onto
High temperature furnace furnace body most the inside, i.e., position shown in Fig. 2, the 1st concrete sample outmost at this time are located just at and can directly add
It is loaded into the loading position of row test；
High temperature furnace fire door is closed, temperature Protonation constant, i.e. heating rate and constant temperature time are set on temperature control system,
And it begins to warm up；
After furnace inner concrete test specimen reaches defined target temperature and constant temperature time, start-up loading equipment makes lower platen
It moves up, push-down head ontology stops after jacking up high temperature resistant cushion block, starts crossbeam, moves down top board, seaming chuck ontology
With stopping when the contact of concrete sample upper surface；
The position for adjusting displacement meter and high temperature resistant guide rod, makes two high temperature resistant guide rods respectively against concrete sample two
The center of a side, while two displacement meters are respectively against longitudinal pressing plate of two high temperature resistant guide rod ends；
Pressure-loaded system is set on computers and starts to load；Lower platen can be according to the load speed of setting at this time
Degree constantly moves up, and passes sequentially through push-down head support, push-down head ontology, high temperature resistant cushion block and transfer the load to concrete examination
On part, increase with load, concrete sample can crack and generate transversely deforming, and displacement acquisition device will record concrete sample
Transversely deforming amount and feed back on computer；
After 1st concrete sample load, test data is stored；Then lower platen, high temperature resistant pad are moved down
Block is fallen back on guide rail, and push-down head ontology and high temperature resistant cushion block disengage after stop moving；Then crossbeam is moved up, it is resistance to
High temperature seaming chuck is completely disengaged with test specimen contact after stop movement, adjust the position of high temperature resistant guide rod, make high temperature resistant guide rod and mixed
Solidifying soil test specimen completely disengages；
Start the power source of pushing meanss, high temperature resistant cushion block is moved along guide rail to fire door direction under the action of catch bar
It is dynamic, stop movement after the 2nd concrete sample is moved to loading position；
Repeat step~, the 2nd concrete sample is loaded；Step is repeated after load~, will
3rd concrete sample is moved to loading position, again repeatedly step~, the 3rd concrete sample is loaded；
After 3 concrete sample whole loadeds, lower platen falls back to bottom, is then shut off loading equipemtn and high temperature
Furnace, and fire door is opened, it is taken out out of furnace after concrete sample is cooling, test is completed.
The present invention has substantive features and progress compared with the prior art, specifically, drawing is split in concrete material high temperature
Testing machine is combined together the heating device of concrete test and loading equipemtn are ingenious, and is aided with displacement acquisition device, is formed
It can be used for splitting the comprehensive test system for drawing test in concrete sample high temperature, high temperature furnace is set to upper pressure by high temperature furnace support frame
Between plate and lower platen, the pilot hole being provided on high temperature furnace on upper and lower perforation and side wall, so that high temperature resistant is pressed above and below
Head and high temperature resistant guide rod can be inside deep enough high temperature furnaces, and it is synchronous with load to realize heating, can be in simulated fire high temperature
The true environment of concrete, displacement acquisition device use two displacement meters and two guide rod structures, acquire concrete sample respectively
The change in displacement data at two sides center, having well solved to measure concrete sample using displacement meter in the high temperature environment
The problem of deformation；Testing machine is drawn to carry out the examination that the test of concrete material Splitting tensile performance obtains by splitting in this concrete material high temperature
It tests result and the actual Splitting tensile performance of concrete in high temperature of fire is very close, for the high temperature and apyrous for studying concrete material
Guarantee can be provided.
Further, column top is equipped with screw thread, and crossbeam is moved up and down and determined by the realization that is threadedly engaged with column
Position, structure is simple, very easy to use.
Further, heating device further includes temperature control system and the temperature sensor in high temperature furnace, being capable of basis
Demand set temperature simultaneously automatically keeps set temperature.
Further, guide rod structure dexterously converts the movement of high temperature resistant guide rod to the movement of displacement meter probe portion,
Displacement meter is set to except high temperature furnace, prevent displacement meter by high temperature damage or is influenced by high temperature and influences accuracy in measurement,
Under tension spring effect, high temperature resistant guide rod can persistently hold out against concrete sample in measurement process.
Further, pushing meanss are moved forward and backward the high temperature resistant cushion block in high temperature furnace, to reach primary liter
Temperature can meet in mechanical performance of concrete test method standard and advise successively to the purpose of 3 concrete sample high temperature load
Fixed 1 group splits the requirement for drawing 3 test specimens of test.
Further, power source includes electric machine support and the motor on electric machine support, and electric machine support includes setting
Screw on two horizontally disposed lead screws being placed on rear side of the high temperature furnace, motor and the lead screw is drivingly connected, and motor exists
Movement is very convenient on lead screw, and graduated scale is equipped with by lead screw, for monitoring the distance of motor and catch bar movement.
Further, splitting on push-down head, which is drawn, is equipped with high temperature cotton pad block around protrusion, facilitate the flat of concrete sample
It is steady to place.
Further, computer connect the letter of the displacement for acquiring displacement meter collecting cassette with displacement meter collecting cassette information
Number, computer and testing machine control box control are connected will pass through testing machine control box control load power source and apply to lower platen
Upward active force and the load signal for receiving testing machine control box feedback.
It is of the invention to draw testing machine to carry out splitting the method for drawing test, energy in high temperature to concrete using splitting in concrete high temperature
Enough using drawing testing machine is split in concrete high temperature, simply and efficiently complete to drawing test is split in concrete high temperature, to study coagulation
The high temperature and fire resistance of soil material provide guarantee.
Detailed description of the invention
Fig. 1 is to split the schematic view of the front view for drawing testing machine in the embodiment of the present invention in concrete material high temperature.
Fig. 2 is to split the side structure schematic view for drawing testing machine in the embodiment of the present invention in concrete material high temperature.
Fig. 3 is the enlarged drawing at Figure 1A.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention will be described in further detail.
Drawing testing machine is split in concrete material high temperature, as shown in FIG. 1 to 3, including for applying to concrete sample 20
The loading equipemtn of pressure, the heating device for heating concrete sample, for measure concrete sample split draw deflection position
Move acquisition device and the pushing meanss for pushing concrete sample to move to fire door direction；Loading equipemtn includes pedestal 6, consolidates
Due on the pedestal 6 column 7, move up and down and position on column 7 and along column 7 crossbeam 9, be fixed on crossbeam bottom
Top board 10, be fixed on top board bottom high temperature resistant seaming chuck, the lower platen 11 on pedestal 6, be set to lower platen 11
On high temperature resistant push-down head, the high temperature resistant cushion block 18 on push-down head ontology 15 and for applying upward work to lower platen 11
Load power source firmly, the lower end of high temperature resistant seaming chuck and the upper end of high temperature resistant cushion block 18, which all have to split, draws protrusion, splits drawing
The surface of protrusion is cambered surface, and 7 upper end of column is connected to increase stability by cross bar 8, and 7 top of column is equipped with screw thread, on crossbeam 9
Both ends rotation is equipped with nut (not shown), and crossbeam 9 is equipped with for driving the motor of the two nut rotations (not show in figure
Show), crossbeam 9 is moved up and down and is positioned by the realization that is threadedly engaged with column 7.High temperature resistant seaming chuck includes being fixedly arranged on top board
Seaming chuck support 16 on 10 and the seaming chuck ontology 14 being fixedly arranged on seaming chuck support 16, high temperature resistant push-down head includes fixed
In the push-down head support 17 on lower platen 11, the push-down head ontology 15 that is fixedly arranged on push-down head support 17, splits and protrusion 29 is drawn to distinguish
On seaming chuck ontology 14 and high temperature resistant cushion block 18, splits and draw around protrusion equipped with high temperature cotton pad block 21, concrete is facilitated to try
The steady placement of part.High temperature resistant seaming chuck and high temperature resistant push-down head are made of silicon nitride combined silicon carbide material, have height
The excellent properties such as hardness, high intensity, high temperature resistant and high temperature creep-resisting；Heating device includes high temperature furnace support frame 2, is set to the high temperature
High temperature furnace 1 on furnace support frame 2, the heater in high temperature furnace, temperature control system 5 and the temperature sensor in high temperature furnace
4, heater is globar, is specially U-shaped globar 3 in the present embodiment, and temperature control system 5 and the sampling of temperature sensor 4 connect, temperature
Control system 5 is electrically connected with U-shaped globar, and temperature sensor 4 is corundum thermocouple, and the front end of high temperature furnace furnace body is provided with fire door 28,
For taking, putting concrete sample 20, fire door is provided with 2 small sircle holes, and situation in furnace is observed when for heating and test.High temperature furnace 1
Between top board 10 and lower platen 17, the setting of the top plate of high temperature furnace for high temperature resistant seaming chuck down through high temperature furnace inside
The bottom plate setting of upper perforation, high temperature furnace penetrates the lower perforation inside high temperature furnace for high temperature resistant push-down head upwards, upper perforation and under wear
Face is arranged in the vertical direction in hole；Displacement acquisition device includes two displacement meters 22 that level is set on two columns 7 respectively, adopts
Collect the displacement meter collecting cassette 23 and two guide rod structures of two displacement meter information, guide rod structure includes being set to 1 two sides of high temperature furnace
Wall and with tension spring 31 spring base 30, be fixedly arranged on longitudinal pressing plate 32 on tension spring top and be fixed on resistance on the inside of longitudinal pressing plate
High temperature guide rod 24, the outside of spring base 30 are equipped with guide slit in transverse direction, and longitudinal pressing plate 32 slides be plugged in transverse direction
In guide slit and the longitudinal direction pressing plate 32 is used to press with the probe portion 33 of corresponding displacement meter and cooperate, and guide rod structure dexterously will be resistance to
The movement of high temperature guide rod is converted into the movement of displacement meter probe portion, and displacement meter is set to except high temperature furnace, prevents from being displaced
Meter is by high temperature damage or is influenced by high temperature and influences accuracy in measurement, under tension spring effect, high temperature resistant guide rod energy in measurement process
It is enough persistently to hold out against concrete sample；Displacement meter 22 is grating displacement meter in the present embodiment.Pushing meanss include being set to high temperature furnace 1
The catch bar 25 being inserted in high temperature furnace sidewall on baseplate inner surface and with the vertically disposed high temperature resistant guide rail 19 of fire door 28, sliding
And the power source that driving catch bar 25 moves back and forth, the bottom of high temperature resistant cushion block 18 is equipped with to be slidably matched with high temperature resistant guide rail 19
Sliding slot, catch bar for pushing high temperature resistant cushion block 18 to slide on high temperature resistant sliding rail 19, power source include electric machine support 27 with
And the motor 26 on electric machine support 27, electric machine support include two horizontally disposed lead screws being set on rear side of high temperature furnace,
Screw on motor and the lead screw is drivingly connected, and graduated scale is equipped with by lead screw.Computer is connect with displacement meter collecting cassette information
For acquiring the displacement signal of displacement meter collecting cassette, computer 13 and the control connection of testing machine control box 12 are will pass through testing machine
The control control load power source of box 12 applies upward active force to lower platen 17 and receives the load of the feedback of testing machine control box 12
Signal, load power source are hydraulic cylinder.
Drawing testing machine is split in the concrete material high temperature of the present embodiment, by the heating device and loading equipemtn of concrete test
It is ingenious to be combined together, and it is aided with displacement acquisition device, it forms and can be used for splitting the synthesis for drawing test in concrete sample high temperature
Pilot system, high temperature furnace are set between top board and lower platen by high temperature furnace support frame, are provided on high temperature furnace and are worn above and below
Pilot hole on hole and side wall enables inside the upper and lower pressure head of high temperature resistant and the deep enough high temperature furnace of high temperature resistant guide rod, realizes
Heating is synchronous with load, can in simulated fire high temperature concrete true environment, displacement acquisition device is using two positions
Meter and two guide rod structures are moved, the change in displacement data at concrete sample two sides center is acquired respectively, has well solved not
Can the problem of concrete sample deforms be measured using displacement meter in the high temperature environment；Examination is drawn by splitting in this concrete material high temperature
Test the actual Splitting tensile performance of concrete in the test result and high temperature of fire that machine progress concrete material Splitting tensile performance test obtains
Closely, the high temperature and fire resistance to study concrete material provide guarantee.Column top is equipped with screw thread, and crossbeam passes through
The realization that is threadedly engaged with column is moved up and down and is positioned, and structure is simple, very easy to use.Heating device further includes temperature control system
System and the temperature sensor in high temperature furnace set temperature and can automatically keep set temperature according to demand.Pushing meanss,
It is moved forward and backward the high temperature resistant cushion block in high temperature furnace, so that 3 concrete sample high temperature can be added by reaching primary heating
The purpose of load meets and splits the requirement for drawing 3 test specimens of test for 1 group specified in mechanical performance of concrete test method standard.It is dynamic
Power source includes electric machine support and the motor on electric machine support, and electric machine support includes two be set on rear side of the high temperature furnace
Screw on a horizontally disposed lead screw, motor and the lead screw is drivingly connected, motor mobile very convenient, lead screw on lead screw
Side is equipped with graduated scale, for monitoring the distance of motor and catch bar movement.Computer connect with displacement meter collecting cassette information and is used for
The displacement signal of displacement meter collecting cassette is acquired, computer and testing machine control box control connection are will pass through testing machine control box control
System load power source applies upward active force to lower platen and receives the load signal of testing machine control box feedback.
In other embodiments, unlike the embodiments above, crossbeam can also be fixed by jackscrew, power source
It can also be the conductive push rod on fixed frame；In other embodiments, unlike the embodiments above, guide rod structure is
Two high temperature resistant guide rods, one end of two high temperature resistant guide rods are fixed on the another of the probe portion of corresponding displacement meter and two high temperature resistant guide rods
The inside of high temperature furnace across corresponding pilot hole is goed deep into so that measure concrete sample splits drawing deflection in end；In other embodiments
In, power source is also possible to electric pushrod or pneumatic cylinder etc..
Testing machine is drawn to carry out splitting the embodiment for drawing the method for test, packet in high temperature to concrete using splitting in concrete high temperature
Include following steps:
Test 3 concrete samples used are put on the high temperature resistant cushion block in high temperature furnace, concrete sample two sides
Pad upper high temperature cotton pad block in lower section；
Fire door is opened, the high temperature resistant guide rail in high temperature furnace shifts the high temperature resistant cushion block that 3 are placed with concrete sample onto
High temperature furnace furnace body most the inside, i.e., position shown in Fig. 2, the 1st concrete sample outmost at this time are located just at and can directly add
It is loaded into the loading position of row test；
High temperature furnace fire door is closed, temperature Protonation constant, i.e. heating rate and constant temperature time are set on temperature control system,
And it begins to warm up；
After furnace inner concrete test specimen reaches defined target temperature and constant temperature time, start-up loading equipment makes lower platen
It moves up, push-down head ontology stops after jacking up high temperature resistant cushion block, starts crossbeam, moves down top board, seaming chuck ontology
With stopping when the contact of concrete sample upper surface；
The position for adjusting displacement meter and high temperature resistant guide rod, makes two high temperature resistant guide rods respectively against concrete sample two
The center of a side, while two displacement meters are respectively against longitudinal pressing plate of two high temperature resistant guide rod ends；
Pressure-loaded system is set on computers and starts to load；Lower platen can be according to the load speed of setting at this time
Degree constantly moves up, and passes sequentially through push-down head support, push-down head ontology, high temperature resistant cushion block and transfer the load to concrete examination
On part, increase with load, concrete sample can crack and generate transversely deforming, and displacement acquisition device will record concrete sample
Transversely deforming amount and feed back on computer；
After 1st concrete sample load, test data is stored；Then lower platen, high temperature resistant pad are moved down
Block is fallen back on guide rail, and push-down head ontology and high temperature resistant cushion block disengage after stop moving；Then crossbeam is moved up, it is resistance to
High temperature seaming chuck is completely disengaged with test specimen contact after stop movement, adjust the position of high temperature resistant guide rod, make high temperature resistant guide rod and mixed
Solidifying soil test specimen completely disengages；
Start the power source of pushing meanss, high temperature resistant cushion block is moved along guide rail to fire door direction under the action of catch bar
It is dynamic, stop movement after the 2nd concrete sample is moved to loading position；
Repeat step~, the 2nd concrete sample is loaded；Step is repeated after load~, will
3rd concrete sample is moved to loading position, again repeatedly step~, the 3rd concrete sample is loaded；
After 3 concrete sample whole loadeds, lower platen falls back to bottom, is then shut off loading equipemtn and high temperature
Furnace, and fire door is opened, it is taken out out of furnace after concrete sample is cooling, test is completed.
The present embodiment carries out concrete to split the method for drawing test, energy in high temperature using drawing testing machine is split in concrete high temperature
Enough using drawing testing machine is split in concrete high temperature, simply and efficiently complete to drawing test is split in concrete high temperature, to study coagulation
The high temperature and fire resistance of soil material provide guarantee.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (6)
1. splitting drawing testing machine in concrete material high temperature, it is characterised in that: including for applying stressed add to concrete sample
Carry equipment, the heating device for heating concrete sample and the displacement acquisition that drawing deflection is split for measuring concrete sample
Device；
The loading equipemtn includes pedestal, the column being fixed on the pedestal, is set on the column and above and below the column
Move and position crossbeam, be fixed on crossbeam bottom top board, be fixed on top board bottom high temperature resistant seaming chuck, be set to institute
State the lower platen on pedestal, the high temperature resistant push-down head on the lower platen, the high temperature resistant cushion block on the push-down head
And the load power source for applying upward active force to the lower platen, the lower end of the high temperature resistant seaming chuck and described
The upper end of high temperature resistant cushion block, which all has to split, draws protrusion；
The heating device includes high temperature furnace support frame, the high temperature furnace on the high temperature furnace support frame and is set in high temperature furnace
Heater, the high temperature furnace is between the top board and the lower platen, described in the setting of the top plate of the high temperature furnace supplies
High temperature resistant seaming chuck supplies the high temperature resistant push-down head down through the upper perforation inside high temperature furnace, the bottom plate setting of the high temperature furnace
The lower perforation inside high temperature furnace is penetrated upwards, and face is arranged in the vertical direction for the upper perforation and the lower perforation；
The displacement acquisition device includes the displacement meter that level is set on two columns respectively, acquires two displacement meter information
Displacement meter collecting cassette and two guide rod structures, the high temperature resistant guide rod of two guide rod structures is isometric, the two sidewalls of the high temperature furnace
On set that there are two the pilot holes passed through for described two high temperature resistant guide rods；
The column top is equipped with screw thread, and the both ends rotation on the crossbeam is equipped with nut, and the crossbeam is equipped with for driving
The motor of the two nut rotations, the crossbeam are moved up and down simultaneously by the cooperation realization of the nut and the screw thread of the column
Positioning；
The guide rod structure include set on the high temperature furnace two sidewalls spring base, be fixedly arranged on tension spring top longitudinal pressing plate and
The high temperature resistant guide rod being fixed on the inside of longitudinal pressing plate, the outside of the spring base is equipped with guide slit in transverse direction, described
Longitudinal pressing plate slide in transverse direction be plugged in the guide slit and the longitudinal direction pressing plate be used for and the corresponding displacement meter
Probe portion press cooperation, the width of the longitudinal direction pressing plate in the up-down direction are wider than the probe portion of the displacement meter in above-below direction
On width.
2. splitting drawing testing machine in concrete material high temperature according to claim 1, it is characterised in that: pressed in the high temperature resistant
Head includes the seaming chuck support being fixedly arranged on the top board and the seaming chuck ontology being fixedly arranged on the seaming chuck support,
The high temperature resistant push-down head includes the push-down head support being fixedly arranged on the lower platen and is fixedly arranged on the push-down head support
Push-down head ontology, corresponding described split draw protrusion to be located on the seaming chuck ontology.
3. splitting drawing testing machine in concrete material high temperature according to claim 1, it is characterised in that: further include pushing meanss
Including be set to the high temperature furnace baseplate inner surface on and with the vertically disposed high temperature resistant guide rail of fire door, be set to the push-down head sheet
The catch bar and the driving catch bar that high temperature resistant cushion block, sliding on body are inserted in high temperature furnace sidewall move back and forth dynamic
Power source, the bottom of the high temperature resistant cushion block are equipped with the sliding slot being slidably matched with the high temperature resistant guide rail, and the catch bar is for pushing away
The high temperature resistant cushion block is moved to slide on the high temperature resistant sliding rail.
4. splitting drawing testing machine in concrete material high temperature according to claim 3, it is characterised in that: the power source includes
Electric machine support and the motor on electric machine support, the electric machine support include two water being set on rear side of the high temperature furnace
Screw on the lead screw that plain cloth is set, motor and the lead screw is drivingly connected, and graduated scale is equipped with by lead screw.
5. splitting drawing testing machine in concrete material high temperature according to any one of claims 1 to 3, it is characterised in that: institute
Splitting on push-down head is stated to draw around protrusion equipped with high temperature cotton pad block.
6. splitting drawing testing machine in concrete material high temperature according to claim 1, it is characterised in that: it further include computer,
The computer connect the displacement signal for acquiring displacement meter collecting cassette, the computer with the displacement meter collecting cassette information
It is upward to lower platen application will pass through testing machine control box control load power source to control connection with testing machine control box
Active force and the load signal for receiving testing machine control box feedback.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510959864.0A CN105403467B (en) | 2015-12-21 | 2015-12-21 | It splits to draw in testing machine and high temperature in concrete material high temperature and splits drawing test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510959864.0A CN105403467B (en) | 2015-12-21 | 2015-12-21 | It splits to draw in testing machine and high temperature in concrete material high temperature and splits drawing test method |
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| CN105403467A CN105403467A (en) | 2016-03-16 |
| CN105403467B true CN105403467B (en) | 2019-03-22 |
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| CN105758732B (en) * | 2016-03-24 | 2018-05-08 | 北京盛广拓公路科技有限公司 | A kind of cold renewal scene core sample Strength Testing Methods |
| CN105910914B (en) * | 2016-04-07 | 2019-09-17 | 西安科技大学 | Multi- scenarios method analog material characteristic test experimental method |
| CN106153491A (en) * | 2016-07-06 | 2016-11-23 | 南京航空航天大学 | Mass loss rate and ess-strain real-time measurement system and measuring method after a kind of carbon fiber bundle oxidation |
| CN107906961B (en) * | 2017-11-13 | 2019-04-05 | 山西大学 | A kind of load concrete elevated temperature impact test furnace |
| CN107655747A (en) * | 2017-11-28 | 2018-02-02 | 郑州大学 | Concrete sample high temperature pulling test device and its fire disaster simulation system |
| CN108061667B (en) * | 2017-12-21 | 2023-05-05 | 华侨大学 | Method for realizing fire resistance performance testing device of combined floor system |
| CN110333184B (en) * | 2019-08-02 | 2022-04-19 | 河南工程学院 | A kind of steel fiber reinforced concrete bond strength tensile test piece and tensile test device |
| CN110320111B (en) * | 2019-08-02 | 2021-12-21 | 河南工程学院 | Tensile test piece, tensile test device and tensile test method |
| CN110320110B (en) * | 2019-08-02 | 2022-02-08 | 河南工程学院 | Tensile test device and heating device |
| CN110646449B (en) * | 2019-09-27 | 2022-03-04 | 长安大学 | Concrete temperature raising and reducing device and method for CT scanning |
| CN111426553B (en) * | 2020-01-19 | 2024-08-27 | 合肥东凯新型建材有限公司 | Concrete material height Wen Pila experimental apparatus |
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| JPS5329587A (en) * | 1976-08-31 | 1978-03-18 | Nippon Telegr & Teleph Corp <Ntt> | Experimental device for testing temperature characteristic of communication cable |
| JP2722583B2 (en) * | 1987-12-29 | 1998-03-04 | 株式会社島津製作所 | Material testing machine |
| JP2557155B2 (en) * | 1991-10-30 | 1996-11-27 | 昭博 森吉 | Material test equipment and test method |
| CN201107232Y (en) * | 2007-08-27 | 2008-08-27 | 济南试金集团有限公司 | Stretching transverse beam of hydraulic universal testing machine |
| CN101936854B (en) * | 2010-08-04 | 2012-06-20 | 中国建筑材料检验认证中心有限公司 | Method for detecting mechanical properties of local heating loading test material under high temperature oxidation environment and device thereof |
| CN103344494B (en) * | 2013-07-16 | 2015-06-24 | 中国农业大学 | Straw stretching property test device |
| CN103674725B (en) * | 2013-12-12 | 2016-09-07 | 中国建筑股份有限公司 | Device and method for testing concrete splitting strength in ultralow temperature environment |
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| CN205262877U (en) * | 2015-12-21 | 2016-05-25 | 郑州大学 | Split in concrete material high temperature and draw testing machine |
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