CN105403467A - Concrete material high temperature splitting testing machine, and high temperature splitting testing method - Google Patents
Concrete material high temperature splitting testing machine, and high temperature splitting testing method Download PDFInfo
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- CN105403467A CN105403467A CN201510959864.0A CN201510959864A CN105403467A CN 105403467 A CN105403467 A CN 105403467A CN 201510959864 A CN201510959864 A CN 201510959864A CN 105403467 A CN105403467 A CN 105403467A
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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
Abstract
The invention provides a concrete material high temperature splitting testing machine, and a high temperature splitting testing method. The concrete material high temperature splitting testing machine comprises a loading device used for applying pressure on concrete test pieces, a heating device used for heating the concrete test pieces, and a displacement acquisition device used for measuring splitting deformation of the concrete test pieces. In concrete experiments, artful combination of the heating device and the loading device is realized, and the displacement acquisition device is also used, so that a comprehensive test system which can be used for concrete test piece high temperature splitting testing is formed, synchronous heating and loading is realized, and realistic simulation of the environment of concrete at fire disaster high temperature can be realized; and the results of concrete material tests using the concrete material high temperature splitting testing machine are extremely close to the results of the practical splitting performance of concrete at fire disaster high temperature, so that guarantees are provided for study on high temperature and fire-resistant performance of concrete materials.
Description
Technical field
The present invention relates to a kind of concrete material testing machine for mechanical properties, especially a kind of for split tensile strength in the material at high temperature such as normal concrete, fiber concrete, regeneration concrete, high-strength concrete with split the testing machine drawing distortion; Also relate to the mechanical test method of concrete material, especially split tensile strength and split the test method of drawing distortion in concrete high temperature.
Background technology
Concrete is the building materials that in engineering construction, purposes is the widest, consumption is maximum.In recent years, along with concrete material high-rise, towering, greatly across etc. the going deep into of particular service requirement and harsh and unforgiving environments application, new requirement is proposed to concrete material high temperature fire resistance, is badly in need of corresponding high-temperature test facility to research and develop the high temperature fire resistance of concrete material.Temperature elevation system and the loading system of existing concrete high temperature wedge interfere equipment are separated often, can not carry out concrete Splitting tensile performance test in proper high temperature, after can only carrying out high temperature, concrete Splitting tensile performance is tested and concrete Splitting tensile performance test in approximate high temperature.After high temperature, the test of concrete Splitting tensile performance is put in heating device by concrete material to heat, and stops heating after reaching desired value, loads after concrete material cooling on loading equipemtn.In approximate high temperature, the test of concrete Splitting tensile performance is then after concrete temperature in heating device reaches desired value, to be put on wedge interfere machine by the concrete material being in the condition of high temperature immediately to load with instruments such as special high temperature-resistant pliers.Find in practical application, no matter be wedge interfere after high temperature, or wedge interfere in approximate high temperature, in the concrete high temperature of gained, in wedge interfere result and high temperature of fire, the Splitting tensile performance of concrete reality all has larger difference.
In order to solve above Problems existing, people are seeking a kind of desirable technical solution always.
Summary of the invention
Technician, through long research of technique, finds the reason producing the problems referred to above finally.The reason that concrete high temperature wedge interfere result and the Splitting tensile performance of concrete reality in high temperature of fire differ greatly is: in concrete high temperature, the temperature elevation system of wedge interfere equipment is separated with loading system, can not realize heating up and working in coordination with of loading, during loading the temperature of concrete sample always in various degree lower than target temperature during heating, concrete sample is in temperature-fall period, outside cooling is fast, internal cooling is slow, thus produce thermal stress gradient, cause the stress damage of concrete material, and then make concrete actual Splitting tensile performance in obtained experimental result and high temperature of fire produce difference.For concrete Splitting tensile performance test after high temperature, during loading, concrete temperature is down to normal temperature, and thermal stress damage clearly.For concrete Splitting tensile performance test in approximate high temperature, although concrete sample loads after taking out from heating device immediately, temperature declines less, but environment temperature during owing to loading is far below the temperature in heating device, the thermal stress gradient of concrete sample is comparatively large, and thermal stress damage is very important equally.In the process of research and development, technician also runs into a technical matters, and the displacement meter namely measuring concrete deformation amount is put into heating device and can be burned.
In addition, according to the existing relevant test methods standards and norms of China, concrete material performance (such as, split tensile strength) determines according to the test findings of lower 3 concrete samples of the same terms, therefore, the intensification problem of 3 identical concrete samples under same high temperature environment must be solved.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: wedge interfere machine in concrete material high temperature, comprises for executing stressed loading equipemtn to concrete sample, for heating the heating device of concrete sample and splitting for measuring concrete sample the displacement acquisition device drawing deflection;
Described loading equipemtn comprises base, the column be fixed on this base, be located on described column and move up and down along described column and the crossbeam of locating, be fixed on top board bottom crossbeam, be fixed on the high temperature resistant seaming chuck bottom top board, the lower platen be located on described base, the high temperature resistant push-down head be located on described lower platen, be located at the high temperature resistant cushion block on described push-down head and the loading power source for applying upwards acting force to described lower platen, and the lower end of described high temperature resistant seaming chuck and the upper end of described high temperature resistant cushion block all have to split draws protuberance;
The heater that described heating device comprises high temperature furnace bracing frame, is located at the high temperature furnace on this high temperature furnace bracing frame and is located in high temperature furnace, described high temperature furnace is between described top board and described lower platen, the top board of described high temperature furnace arranges the upper perforation penetrating high temperature furnace inside for described high temperature resistant seaming chuck downwards, the base plate of described high temperature furnace arranges the lower perforation upwards penetrating high temperature furnace inside for described high temperature resistant push-down head, and described upper perforation and described lower perforation in the vertical direction are just to setting;
Described displacement acquisition device comprises level respectively and is located at the displacement meter on column described in two, the displacement meter collecting cassette gathering two displacement meter information and two guide rod structures, the high temperature resistant guide rod of two guide rod structures is isometric, and the two side of described high temperature furnace is provided with the pilot hole that two described two high temperature resistant guide rods of confession pass.
Preferably, described high temperature resistant seaming chuck comprises the seaming chuck bearing be fixedly arranged on described top board and the seaming chuck body be fixedly arranged on described seaming chuck bearing, described high temperature resistant push-down head comprises the push-down head bearing be fixedly arranged on described lower platen and the push-down head body be fixedly arranged on described push-down head bearing, splits and draw protuberance to be positioned on described seaming chuck body described in corresponding.
Preferably, described column top is provided with screw thread, and the two ends on described crossbeam are rotated and are provided with nut, and described crossbeam is provided with the motor for driving nut rotation described in two, and described crossbeam is by realizing moving up and down and locating with the threaded engagement of described column.
Preferably, described heating device also comprises temperature control system and is located at the temperature sensor in described high temperature furnace, and described heater is globar, and described temperature control system is connected with described temperature sensor sampling, and described temperature control system is electrically connected with described Elema.
Preferably, described guide rod structure comprises to be located at described high temperature furnace two side and to have the spring base of extension spring, the longitudinal pressing plate being fixedly arranged on extension spring top and the described high temperature resistant guide rod be fixed on inside longitudinal pressing plate, the outside of described spring base is transversely provided with guide slit in direction, described longitudinal pressing plate transversely direction slide to be plugged in described guide slit and this longitudinal pressing plate for the probe portion top press fit with corresponding described displacement meter.
Preferably, also comprise thrust unit comprise be located at described high temperature furnace plate inner surface on and with the vertically disposed high temperature resistant guide rail of fire door, the high temperature resistant cushion block be located on described push-down head body, slide the catch bar that is inserted on high temperature furnace sidewall and drive the reciprocating power source of described catch bar, the bottom of described high temperature resistant cushion block is provided with the chute coordinated with described high temperature resistant slide, and described catch bar slides on described high temperature resistant slide rail for promoting described high temperature resistant cushion block.
Preferably, described power source comprises electric machine support and is located at the motor on electric machine support, described electric machine support comprises and is arranged at the horizontally disposed leading screw of on rear side of described high temperature furnace two, and motor drives with the screw on described leading screw and is connected, and leading screw is other is provided with rule.
Preferably, splitting on described push-down head draws the surrounding of protuberance to be provided with high temperature cotton pad block.
Preferably, also comprise computing machine, described computing machine is connected the displacement signal for gathering displacement meter collecting cassette with described displacement meter collecting cassette information, and described computing machine and testing machine control box control linkage are to apply upwards acting force by testing machine control box controlled loading power source to described lower platen and the load signal that feeds back of acceptance test machine control enclosure.
Utilize wedge interfere machine in concrete high temperature concrete to be carried out to the method for wedge interfere in high temperature, it is characterized in that comprising the steps:
test 3 concrete samples used are put on the high temperature resistant cushion block in high temperature furnace, high temperature cotton pad block on concrete sample down either side pad;
open fire door, the high temperature resistant cushion block 3 being placed with concrete sample along the high temperature resistant guide rail in high temperature furnace shifts high temperature furnace body of heater the inside onto, i.e. position shown in Fig. 2, now outmost 1st concrete sample is just positioned at the loading position that directly can load and carry out testing;
close high temperature furnace fire door, set temperature Protonation constant on temperature control system, i.e. programming rate and constant temperature time, and start heating;
after the target temperature that stove inner concrete test specimen reaches regulation and constant temperature time, start-up loading equipment, makes lower platen move up, stop after push-down head body jack-up is high temperature resistant cushion block, start crossbeam, top board is moved down, stop during the contact of seaming chuck body and concrete sample upper surface;
adjustment displacement meter and the position of high temperature resistant guide rod, make two high temperature resistant guide rods withstand the center of concrete sample two sides respectively, and two displacement meters withstand longitudinal pressing plate of two high temperature resistant guide rod ends respectively simultaneously;
pressure-loaded system is set on computers and starts to load; Now lower platen constantly can move up according to the loading velocity of setting, and transfer the load on concrete sample by push-down head bearing, push-down head body, high temperature resistant cushion block successively, increase with load, concrete sample can ftracture and produce transversely deforming, and displacement acquisition device will be recorded the transversely deforming amount of concrete sample and feed back on computing machine;
1st concrete sample stores test figure after loading and terminating; Then move down lower platen, high temperature resistant cushion block falls back on guide rail, and push-down head body and high temperature resistant cushion block disengage rear stop mobile; Then move up crossbeam, and high temperature resistant seaming chuck and test specimen disengage rear stopping completely and move, and adjust the position of high temperature resistant guide rod, high temperature resistant guide rod and concrete sample are departed from completely;
start the power source of thrust unit, high temperature resistant cushion block moves along guide rail to fire door direction under the effect of catch bar, moves to after loading position stop moving until the 2nd concrete sample;
repeat step
~
, the 2nd concrete sample is loaded; Loading terminates rear repetition step
~
, the 3rd concrete sample is moved to loading position, again repeats step
~
, the 3rd concrete sample is loaded;
after 3 whole loadeds of concrete sample, lower platen falls back to the end, then closes loading equipemtn and high temperature furnace, and opens fire door, and take out in stove after concrete sample cooling, test completes.
Hinge structure of the present invention has substantive distinguishing features and progress, specifically, wedge interfere machine in concrete material high temperature, by the heating device of concrete test with loading equipemtn is ingenious combines, and be aided with displacement acquisition device, define the comprehensive test system that can be used for wedge interfere in concrete sample high temperature, high temperature furnace is located between top board and lower platen by high temperature furnace bracing frame, on high temperature furnace is provided with, pilot hole on lower perforation and sidewall, make high temperature resistant on, push-down head and the deep enough high temperature furnace inside of high temperature resistant guide rod energy, achieve heat up with loading synchronous, can concrete true environment in simulated fire high temperature, displacement acquisition device adopts two displacement meters and two guide rod structures, gather the change in displacement data at center, concrete sample two sides respectively, solve the problem that displacement meter can not be used in hot environment to measure concrete sample distortion well, carry out concrete material Splitting tensile performance by wedge interfere machine in this concrete material high temperature and test the Splitting tensile performance of concrete reality in the test findings and high temperature of fire drawn closely, for the high temperature and fire resistance studying concrete material provides guarantee.
Further, column top is provided with screw thread, and crossbeam is by realizing moving up and down and locating with the threaded engagement of column, and structure is simple, very easy to use.
Further, heating device also comprises temperature control system and is located at the temperature sensor in high temperature furnace, also automatically can keep design temperature by design temperature according to demand.
Further, the movement of high temperature resistant guide rod is converted into the movement of displacement meter probe portion by guide rod structure dexterously, displacement meter can be located at outside high temperature furnace, prevent displacement meter to be subject to high temperature failure or be subject to temperatures involved and affect measurement accuracy, under extension spring effect, high temperature resistant guide rod can continue to hold out against concrete sample in measuring process.
Further, thrust unit, high temperature resistant cushion block in high temperature furnace can be moved forward and backward, thus reach and once heat up and successively to the object that 3 concrete sample high temperature load, the requirement of 1 group of wedge interfere, 3 test specimens specified in mechanical performance of concrete test method standard can be met.
Further, power source comprises electric machine support and is located at the motor on electric machine support, electric machine support comprises and is arranged at the horizontally disposed leading screw of on rear side of described high temperature furnace two, motor drives with the screw on described leading screw and is connected, motor is mobile very convenient on leading screw, leading screw is other is provided with rule, for monitoring the distance of motor and catch bar movement.
Further, splitting on push-down head draws the surrounding of protuberance to be provided with high temperature cotton pad block, facilitates the steady placement of concrete sample.
Further, computing machine is connected the displacement signal for gathering displacement meter collecting cassette with displacement meter collecting cassette information, and computing machine and testing machine control box control linkage are to apply upwards acting force by testing machine control box controlled loading power source to lower platen and the load signal that feeds back of acceptance test machine control enclosure.
Of the present inventionly wedge interfere machine in concrete high temperature is utilized concrete to be carried out to the method for wedge interfere in high temperature, wedge interfere machine in concrete high temperature can be utilized, simply complete wedge interfere in concrete high temperature efficiently, for the high temperature and fire resistance studying concrete material provides guarantee.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of wedge interfere machine in concrete material high temperature in the embodiment of the present invention.
Fig. 2 is the side-looking structural representation of wedge interfere machine in concrete material high temperature in the embodiment of the present invention.
Fig. 3 is the enlarged drawing at Figure 1A place.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
Wedge interfere machine in concrete material high temperature, as shown in FIG. 1 to 3, comprise for concrete sample 20 is executed stressed loading equipemtn, for heat concrete sample heating device, split draw the displacement acquisition device of deflection and for promoting the thrust unit that concrete sample moves to fire door direction for measuring concrete sample, loading equipemtn comprises base 6, be fixed on the column 7 on this base 6, to be located on column 7 and to move up and down and the crossbeam 9 of locating along column 7, be fixed on the top board 10 bottom crossbeam, be fixed on the high temperature resistant seaming chuck bottom top board, be located at the lower platen 11 on base 6, be located at the high temperature resistant push-down head on lower platen 11, be located at the high temperature resistant cushion block 18 on push-down head body 15 and the loading power source for applying upwards acting force to lower platen 11, the lower end of high temperature resistant seaming chuck and the upper end of high temperature resistant cushion block 18 all have to split draws protuberance, split and draw the surface of protuberance to be cambered surface, column 7 upper end is connected by cross bar 8 to increase stability, column 7 top is provided with screw thread, two ends on crossbeam 9 are rotated and are provided with nut (not shown), crossbeam 9 is provided with the motor (not shown) for driving nut rotation described in two, crossbeam 9 is by realizing moving up and down and locating with the threaded engagement of column 7.High temperature resistant seaming chuck comprises the seaming chuck bearing 16 be fixedly arranged on top board 10 and the seaming chuck body 14 be fixedly arranged on seaming chuck bearing 16, high temperature resistant push-down head comprises the push-down head bearing 17 be fixedly arranged on lower platen 11, the push-down head body 15 be fixedly arranged on push-down head bearing 17, split and draw protuberance 29 to lay respectively on seaming chuck body 14 and high temperature resistant cushion block 18, split and draw the surrounding of protuberance to be provided with high temperature cotton pad block 21, facilitate the steady placement of concrete sample.High temperature resistant seaming chuck and high temperature resistant push-down head are made by silicon nitride combined silicon carbide material, have the excellent properties such as high rigidity, high strength, high temperature resistant and high temperature creep-resisting; The temperature sensor 4 that heating device comprises high temperature furnace bracing frame 2, is located at the high temperature furnace 1 on this high temperature furnace bracing frame 2, the heater be located in high temperature furnace, temperature control system 5 and is located in high temperature furnace, heater is globar, U-shaped globar 3 is specially in the present embodiment, temperature control system 5 is sampled with temperature sensor 4 and is connected, temperature control system 5 is electrically connected with U-shaped globar, temperature sensor 4 is corundum thermopair, the front end of high temperature furnace body of heater has fire door 28, for taking, putting concrete sample 20, fire door has 2 small sircle holes, observes situation in stove for when heating and test.High temperature furnace 1 is between top board 10 and lower platen 17, the top board of high temperature furnace arranges the upper perforation penetrating high temperature furnace inside for high temperature resistant seaming chuck downwards, the base plate of high temperature furnace arranges the lower perforation upwards penetrating high temperature furnace inside for high temperature resistant push-down head, and upper perforation and lower perforation in the vertical direction are just to setting, displacement acquisition device comprises level respectively and is located at two displacement meters 22 on two columns 7, gather displacement meter collecting cassette 23 and two guide rod structures of two displacement meter information, guide rod structure comprises is located at high temperature furnace 1 two side and the spring base 30 with extension spring 31, the longitudinal pressing plate 32 being fixedly arranged on extension spring top and the high temperature resistant guide rod 24 be fixed on inside longitudinal pressing plate, the outside of spring base 30 is transversely provided with guide slit in direction, longitudinal pressing plate 32 transversely direction slide be plugged in guide slit and this longitudinal pressing plate 32 for pushing up press fit with the probe portion 33 of corresponding displacement meter, the movement of high temperature resistant guide rod is converted into the movement of displacement meter probe portion by guide rod structure dexterously, displacement meter can be located at outside high temperature furnace, prevent displacement meter to be subject to high temperature failure or be subject to temperatures involved and affect measurement accuracy, under extension spring effect, high temperature resistant guide rod can continue to hold out against concrete sample in measuring process, in the present embodiment, displacement meter 22 is grating displacement meter.Thrust unit comprise be located at high temperature furnace 1 plate inner surface on and high temperature resistant guide rail 19 vertically disposed with fire door 28, slide the catch bar 25 and the reciprocating power source of driving catch bar 25 that are inserted on high temperature furnace sidewall, the bottom of high temperature resistant cushion block 18 is provided with the chute be slidably matched with high temperature resistant guide rail 19, catch bar slides on high temperature resistant slide rail 19 for promoting high temperature resistant cushion block 18, power source comprises electric machine support 27 and is located at the motor 26 on electric machine support 27, electric machine support comprises and is arranged at the horizontally disposed leading screw of on rear side of high temperature furnace two, motor drives with the screw on described leading screw and is connected, leading screw is other is provided with rule.Computing machine is connected the displacement signal for gathering displacement meter collecting cassette with displacement meter collecting cassette information, computing machine 13 applies upwards acting force with testing machine control box 12 control linkage so that by testing machine control box 12 controlled loading power source to lower platen 17 and the load signal that feeds back of acceptance test machine control enclosure 12, and loading power source is hydraulic cylinder.
Wedge interfere machine in the concrete material high temperature of the present embodiment, by the heating device of concrete test with loading equipemtn is ingenious combines, and be aided with displacement acquisition device, define the comprehensive test system that can be used for wedge interfere in concrete sample high temperature, high temperature furnace is located between top board and lower platen by high temperature furnace bracing frame, on high temperature furnace is provided with, pilot hole on lower perforation and sidewall, make high temperature resistant on, push-down head and the deep enough high temperature furnace inside of high temperature resistant guide rod energy, achieve heat up with loading synchronous, can concrete true environment in simulated fire high temperature, displacement acquisition device adopts two displacement meters and two guide rod structures, gather the change in displacement data at center, concrete sample two sides respectively, solve the problem that displacement meter can not be used in hot environment to measure concrete sample distortion well, carry out concrete material Splitting tensile performance by wedge interfere machine in this concrete material high temperature and test the Splitting tensile performance of concrete reality in the test findings and high temperature of fire drawn closely, for the high temperature and fire resistance studying concrete material provides guarantee.Column top is provided with screw thread, and crossbeam is by realizing moving up and down and locating with the threaded engagement of column, and structure is simple, very easy to use.Heating device also comprises temperature control system and is located at the temperature sensor in high temperature furnace, also automatically can keep design temperature by design temperature according to demand.Thrust unit, high temperature resistant cushion block in high temperature furnace can be moved forward and backward, thus reach the object once heating up and can load 3 concrete sample high temperature, meet the requirement of 1 group of wedge interfere, 3 test specimens specified in mechanical performance of concrete test method standard.Power source comprises electric machine support and is located at the motor on electric machine support, electric machine support comprises and is arranged at the horizontally disposed leading screw of on rear side of described high temperature furnace two, motor drives with the screw on described leading screw and is connected, motor is mobile very convenient on leading screw, leading screw is other is provided with rule, for monitoring the distance of motor and catch bar movement.Computing machine is connected the displacement signal for gathering displacement meter collecting cassette with displacement meter collecting cassette information, and computing machine and testing machine control box control linkage are to apply upwards acting force by testing machine control box controlled loading power source to lower platen and the load signal that feeds back of acceptance test machine control enclosure.
In other embodiments, with above-described embodiment unlike, crossbeam can also be fixed by jackscrew, and power source can also for being located at the conductive push rod on fixed mount; In other embodiments, with above-described embodiment unlike, guide rod structure is two high temperature resistant guide rods, and one end of two high temperature resistant guide rods is fixed on the probe portion of corresponding displacement meter and deflection is drawn to measure splitting of concrete sample in the inside that the other end of two high temperature resistant guide rods gos deep into high temperature furnace through corresponding pilot hole; In other embodiments, power source also can be electric pushrod or pneumatic cylinder etc.
Utilize wedge interfere machine in concrete high temperature concrete to be carried out to the embodiment of the method for wedge interfere in high temperature, comprise the steps:
test 3 concrete samples used are put on the high temperature resistant cushion block in high temperature furnace, high temperature cotton pad block on concrete sample down either side pad;
open fire door, the high temperature resistant cushion block 3 being placed with concrete sample along the high temperature resistant guide rail in high temperature furnace shifts high temperature furnace body of heater the inside onto, i.e. position shown in Fig. 2, now outmost 1st concrete sample is just positioned at the loading position that directly can load and carry out testing;
close high temperature furnace fire door, set temperature Protonation constant on temperature control system, i.e. programming rate and constant temperature time, and start heating;
after the target temperature that stove inner concrete test specimen reaches regulation and constant temperature time, start-up loading equipment, makes lower platen move up, stop after push-down head body jack-up is high temperature resistant cushion block, start crossbeam, top board is moved down, stop during the contact of seaming chuck body and concrete sample upper surface;
adjustment displacement meter and the position of high temperature resistant guide rod, make two high temperature resistant guide rods withstand the center of concrete sample two sides respectively, and two displacement meters withstand longitudinal pressing plate of two high temperature resistant guide rod ends respectively simultaneously;
pressure-loaded system is set on computers and starts to load; Now lower platen constantly can move up according to the loading velocity of setting, and transfer the load on concrete sample by push-down head bearing, push-down head body, high temperature resistant cushion block successively, increase with load, concrete sample can ftracture and produce transversely deforming, and displacement acquisition device will be recorded the transversely deforming amount of concrete sample and feed back on computing machine;
1st concrete sample stores test figure after loading and terminating; Then move down lower platen, high temperature resistant cushion block falls back on guide rail, and push-down head body and high temperature resistant cushion block disengage rear stop mobile; Then move up crossbeam, and high temperature resistant seaming chuck and test specimen disengage rear stopping completely and move, and adjust the position of high temperature resistant guide rod, high temperature resistant guide rod and concrete sample are departed from completely;
start the power source of thrust unit, high temperature resistant cushion block moves along guide rail to fire door direction under the effect of catch bar, moves to after loading position stop moving until the 2nd concrete sample;
repeat step
~
, the 2nd concrete sample is loaded; Loading terminates rear repetition step
~
, the 3rd concrete sample is moved to loading position, again repeats step
~
, the 3rd concrete sample is loaded;
after 3 whole loadeds of concrete sample, lower platen falls back to the end, then closes loading equipemtn and high temperature furnace, and opens fire door, and take out in stove after concrete sample cooling, test completes.
The present embodiment utilizes wedge interfere machine in concrete high temperature concrete to be carried out to the method for wedge interfere in high temperature, wedge interfere machine in concrete high temperature can be utilized, simply complete wedge interfere in concrete high temperature efficiently, for the high temperature and fire resistance studying concrete material provides guarantee.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.
Claims (10)
1. wedge interfere machine in concrete material high temperature, is characterized in that: comprise for executing stressed loading equipemtn to concrete sample, for heating the heating device of concrete sample and splitting for measuring concrete sample the displacement acquisition device drawing deflection;
Described loading equipemtn comprises base, the column be fixed on this base, be located on described column and move up and down along described column and the crossbeam of locating, be fixed on top board bottom crossbeam, be fixed on the high temperature resistant seaming chuck bottom top board, the lower platen be located on described base, the high temperature resistant push-down head be located on described lower platen, be located at the high temperature resistant cushion block on described push-down head and the loading power source for applying upwards acting force to described lower platen, and the lower end of described high temperature resistant seaming chuck and the upper end of described high temperature resistant cushion block all have to split draws protuberance;
The heater that described heating device comprises high temperature furnace bracing frame, is located at the high temperature furnace on this high temperature furnace bracing frame and is located in high temperature furnace, described high temperature furnace is between described top board and described lower platen, the top board of described high temperature furnace arranges the upper perforation penetrating high temperature furnace inside for described high temperature resistant seaming chuck downwards, the base plate of described high temperature furnace arranges the lower perforation upwards penetrating high temperature furnace inside for described high temperature resistant push-down head, and described upper perforation and described lower perforation in the vertical direction are just to setting;
Described displacement acquisition device comprises level respectively and is located at the displacement meter on column described in two, the displacement meter collecting cassette gathering two displacement meter information and two guide rod structures, the high temperature resistant guide rod of two guide rod structures is isometric, and the two side of described high temperature furnace is provided with the pilot hole that two described two high temperature resistant guide rods of confession pass.
2. wedge interfere machine in concrete material high temperature according to claim 1, it is characterized in that: described high temperature resistant seaming chuck comprises the seaming chuck bearing be fixedly arranged on described top board and the seaming chuck body be fixedly arranged on described seaming chuck bearing, described high temperature resistant push-down head comprises the push-down head bearing be fixedly arranged on described lower platen and the push-down head body be fixedly arranged on described push-down head bearing, splits and draw protuberance to be positioned on described seaming chuck body described in corresponding.
3. wedge interfere machine in concrete material high temperature according to claim 1, it is characterized in that: described column top is provided with screw thread, two ends on described crossbeam are rotated and are provided with nut, described crossbeam is provided with the motor for driving nut rotation described in two, and described crossbeam is by realizing moving up and down and locating with the threaded engagement of described column.
4. wedge interfere machine in concrete material high temperature according to claim 1, it is characterized in that: described heating device also comprises temperature control system and is located at the temperature sensor in described high temperature furnace, described heater is globar, described temperature control system is connected with described temperature sensor sampling, and described temperature control system is electrically connected with described Elema.
5. wedge interfere machine in concrete material high temperature according to claim 1, it is characterized in that: described guide rod structure comprises to be located at described high temperature furnace two side and to have the spring base of extension spring, the longitudinal pressing plate being fixedly arranged on extension spring top and the described high temperature resistant guide rod be fixed on inside longitudinal pressing plate, the outside of described spring base is transversely provided with guide slit in direction, described longitudinal pressing plate transversely direction slide to be plugged in described guide slit and this longitudinal pressing plate for the probe portion top press fit with corresponding described displacement meter.
6. wedge interfere machine in concrete material high temperature according to claim 1, it is characterized in that: also comprise thrust unit comprise be located at described high temperature furnace plate inner surface on and with the vertically disposed high temperature resistant guide rail of fire door, the high temperature resistant cushion block be located on described push-down head body, slide the catch bar that is inserted on high temperature furnace sidewall and drive the reciprocating power source of described catch bar, the bottom of described high temperature resistant cushion block is provided with the chute coordinated with described high temperature resistant slide, and described catch bar slides on described high temperature resistant slide rail for promoting described high temperature resistant cushion block.
7. wedge interfere machine in concrete material high temperature according to claim 6, it is characterized in that: described power source comprises electric machine support and is located at the motor on electric machine support, described electric machine support comprises and is arranged at the horizontally disposed leading screw of on rear side of described high temperature furnace two, motor drives with the screw on described leading screw and is connected, and leading screw is other is provided with rule.
8. wedge interfere machine in the concrete material high temperature according to claim 1 ~ 6 any one, is characterized in that: splitting on described push-down head draws the surrounding of protuberance to be provided with high temperature cotton pad block.
9. wedge interfere machine in concrete material high temperature according to claim 1, it is characterized in that: also comprise computing machine, described computing machine is connected the displacement signal for gathering displacement meter collecting cassette with described displacement meter collecting cassette information, and described computing machine and testing machine control box control linkage are to apply upwards acting force by testing machine control box controlled loading power source to described lower platen and the load signal that feeds back of acceptance test machine control enclosure.
10. utilize wedge interfere machine in concrete high temperature concrete to be carried out to the method for wedge interfere in high temperature, it is characterized in that comprising the steps:
test 3 concrete samples used are put on the high temperature resistant cushion block in high temperature furnace, high temperature cotton pad block on concrete sample down either side pad;
open fire door, the high temperature resistant cushion block 3 being placed with concrete sample along the high temperature resistant guide rail in high temperature furnace shifts high temperature furnace body of heater the inside onto, i.e. position shown in Fig. 2, now outmost 1st concrete sample is just positioned at the loading position that directly can load and carry out testing;
close high temperature furnace fire door, set temperature Protonation constant on temperature control system, i.e. programming rate and constant temperature time, and start heating;
after the target temperature that stove inner concrete test specimen reaches regulation and constant temperature time, start-up loading equipment, makes lower platen move up, stop after push-down head body jack-up is high temperature resistant cushion block, start crossbeam, top board is moved down, stop during the contact of seaming chuck body and concrete sample upper surface;
adjustment displacement meter and the position of high temperature resistant guide rod, make two high temperature resistant guide rods withstand the center of concrete sample two sides respectively, and two displacement meters withstand longitudinal pressing plate of two high temperature resistant guide rod ends respectively simultaneously;
pressure-loaded system is set on computers and starts to load; Now lower platen constantly can move up according to the loading velocity of setting, and transfer the load on concrete sample by push-down head bearing, push-down head body, high temperature resistant cushion block successively, increase with load, concrete sample can ftracture and produce transversely deforming, and displacement acquisition device will be recorded the transversely deforming amount of concrete sample and feed back on computing machine;
1st concrete sample stores test figure after loading and terminating; Then move down lower platen, high temperature resistant cushion block falls back on guide rail, and push-down head body and high temperature resistant cushion block disengage rear stop mobile; Then move up crossbeam, and high temperature resistant seaming chuck and test specimen disengage rear stopping completely and move, and adjust the position of high temperature resistant guide rod, high temperature resistant guide rod and concrete sample are departed from completely;
start the power source of thrust unit, high temperature resistant cushion block moves along guide rail to fire door direction under the effect of catch bar, moves to after loading position stop moving until the 2nd concrete sample;
repeat step
~
, the 2nd concrete sample is loaded; Loading terminates rear repetition step
~
, the 3rd concrete sample is moved to loading position, again repeat step ~
, the 3rd concrete sample is loaded;
after 3 whole loadeds of concrete sample, lower platen falls back to the end, then closes loading equipemtn and high temperature furnace, and opens fire door, and take out in stove after concrete sample cooling, test completes.
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