CN116242717B - Mechanical property testing device of fiber concrete initial torsion member scaling model - Google Patents
Mechanical property testing device of fiber concrete initial torsion member scaling model Download PDFInfo
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- CN116242717B CN116242717B CN202310013502.7A CN202310013502A CN116242717B CN 116242717 B CN116242717 B CN 116242717B CN 202310013502 A CN202310013502 A CN 202310013502A CN 116242717 B CN116242717 B CN 116242717B
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- 238000007789 sealing Methods 0.000 claims description 90
- 229910000831 Steel Inorganic materials 0.000 claims description 32
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- 238000005507 spraying Methods 0.000 claims description 27
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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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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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
- G01N3/02—Details
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0021—Torsional
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A mechanical property testing device of a fiber concrete initial torsion member scaling model relates to the technical field of composite material mechanical property testing. The invention solves the problems that the existing building component mechanical property testing device is difficult to clamp and fix the initial torsion component, and the mechanical property testing result of the initial torsion component is not objective and accurate because the natural environment factors are ignored when the mechanical property of the initial torsion component is tested. The upper clamping assembly is connected with the top end of a test piece to be tested through the upper clamping part, the lower clamping assembly is connected with the bottom end of the test piece to be tested through the lower clamping part, the upper driving assembly is used for driving the upper clamping assembly to rotate in the forward direction or the reverse direction, the lower driving assembly is used for driving the lower clamping assembly to rotate in the reverse direction or the forward direction, and torque sensors are connected between the upper clamping assembly and the lower clamping assembly and between the upper driving assembly and the lower driving assembly. The invention is used for measuring the torsional strength of the fiber concrete initial torsion member scaling model under different simulation environments.
Description
Technical Field
The invention relates to the technical field of composite material mechanical property testing, in particular to a mechanical property testing device of a fiber concrete initial torsion member shrinkage model.
Background
With the increasing aesthetic requirements of buildings, a great number of novel structural systems appear in the design of building structures, such as latticed shells, suspension locks, and tensioned cable-membranes. Accordingly, in structural member design, irregular members must be employed. A large number of initially curved and twisted members are employed in national stadium (bird nest) designs; the structures of Guangzhou Tower (thin waist) and Shanghai central building (Shanghai Tower) are integrally of torsion variable cross-section structure and are also in an initial torsion state. In water construction, rectangular beams and columns are often required to support a bridge body, and in order to improve the ornamental value of the construction, the rectangular beams, columns and other components are designed to be initially twisted, the initially twisted components are also called natural twisting components, and the components are in a natural twisting state in an initial state.
The fiber composite material has the characteristics of high strength, light weight, corrosion resistance, fatigue resistance and the like, and can replace the traditional concrete, wood structure, steel and reinforced bar materials in civil construction engineering. Such as for fiber concrete. Fiber concrete refers to cement-based composite materials which are formed by taking cement paste, mortar or concrete as a base material and taking fiber as a reinforcing material. Because the fiber has high tensile strength and high elongation, the tensile strength, bending resistance, impact strength, elongation and toughness of the concrete are improved.
The fiber composite material is applied to the initial torsion member, so that the mechanical property of the initial torsion member is improved, and the fiber composite material is a development trend in the design of building structures. With the wider and wider application of the initial torsion structure in the building, the testing of the mechanical properties of the initial torsion structure has very important significance. Especially, the initial torsion rectangular beams and columns used for supporting the bridge body are soaked in water for a long time or are washed by rain for a long time, so that the mechanical properties of the initial torsion rectangular beams and columns are affected to a certain extent. Therefore, there is a need for a mechanical property testing device that can simulate the environment.
At present, the existing building component mechanical property testing device has the problems that a device special for testing an initial torsion component is not available, the initial torsion component is difficult to clamp and fix due to the fact that the initial torsion component is in an irregular shape, natural environment factors are ignored when the initial torsion component is subjected to mechanical property testing, and the mechanical property testing result of the initial torsion component is inaccurate.
Disclosure of Invention
The invention aims to solve the problems that the existing building component mechanical property testing device is not specially used for testing an initial torsion component, the initial torsion component is difficult to clamp and fix due to the fact that the initial torsion component is of an irregular shape, and natural environment factors are ignored when the initial torsion component is subjected to mechanical property testing, so that the mechanical property testing result of the initial torsion component is not objective and inaccurate, and further provides the mechanical property testing device of the fiber concrete initial torsion component shrinkage model.
The technical scheme of the invention is as follows:
the mechanical property testing device of the fiber concrete initial torsion component scaling model comprises a rectangular steel structure frame 1, an upper clamping assembly 2, a lower clamping assembly 3, a liquid spraying assembly 4, a liquid collecting assembly 5, an upper driving assembly, a lower driving assembly, two torque sensors and a plurality of strain gauge sensors, wherein the rectangular steel structure frame 1 is vertically arranged on a workbench surface, the upper clamping assembly 2 and the lower clamping assembly 3 are sequentially and oppositely arranged inside the rectangular steel structure frame 1 from top to bottom, a test piece to be tested is vertically arranged between the upper clamping assembly 2 and the lower clamping assembly 3, and the outer surface of the test piece to be tested is sequentially stuck with the plurality of strain gauge sensors from top to bottom;
the upper clamping assembly 2 comprises an upper connecting part and an upper clamping part, the upper clamping assembly 2 is arranged at the bottom of an upper cross beam 11 of the rectangular steel structure frame 1 through the upper connecting part, the top end of the upper connecting part penetrates through the upper cross beam 11 and is connected with the output end of an upper driving assembly, the upper driving assembly is arranged on the upper surface of the upper cross beam 11 and is used for driving the upper clamping assembly 2 to rotate forwards or reversely, the upper clamping assembly 2 is connected with the top end of a test piece to be tested through the upper clamping part, and a torque sensor is connected between the upper clamping assembly 2 and the upper driving assembly;
The lower clamping assembly 3 comprises a lower connecting part and a lower clamping part, the lower clamping assembly 3 is arranged at the top of a lower cross beam 12 of the rectangular steel structure frame 1 through the lower connecting part, the bottom end of the lower connecting part penetrates through the lower cross beam 12 and is connected with the output end of a lower driving assembly, the lower driving assembly is arranged on the upper surface of a base 13 of the rectangular steel structure frame 1 and is used for driving the lower clamping assembly 3 to rotate reversely or positively, the lower clamping assembly 3 is connected with the bottom end of a test piece to be tested through the lower clamping part, and a torque sensor is connected between the lower clamping assembly 3 and the lower driving assembly;
go up clamp assembly 2 and have arranged drenching liquid subassembly 4 and collection liquid subassembly 5 down in proper order between the clamp assembly 3 down, drenching liquid subassembly 4 is located test piece upper portion that awaits measuring, collection liquid subassembly 5 is located test piece lower part that awaits measuring, drenching liquid subassembly 4 and collection liquid subassembly 5 are all installed on rectangle steel construction frame 1's both sides stand, drenching liquid subassembly 4's inlet and outside liquid feed system and be connected, drenching liquid subassembly 4's liquid outlet orientation test piece that awaits measuring, collection liquid subassembly 5 wholly is telescopic hose structure, collection liquid subassembly 5 bottom is equipped with inflatable annular seal bag body, the air inlet and the outside air feed system of inflatable annular seal bag body are connected, inflatable annular seal bag body cover is established in test piece lower part that awaits measuring, inflatable annular seal bag body is sealed laminating with test piece outer wall that awaits measuring under the state.
Further, the liquid spraying component 4 comprises an upper annular supporting plate 41, an upper flange 42, an upper rubber ring 43, an annular spraying cavity structure 44, two upper fixing frames 45 and a plurality of universal nozzles, wherein the upper annular supporting plate 41 is horizontally sleeved on the upper part of a test piece to be tested, two sides of the outer wall of the upper annular supporting plate 41 are respectively installed on two upright posts on two sides of the rectangular steel structure frame 1 through the two upper fixing frames 45, the annular spraying cavity structure 44 is coaxially fixed on the inner wall of the upper annular supporting plate 41, a liquid inlet connector communicated with an inner cavity is installed on the outer wall of the annular spraying cavity structure 44, the liquid inlet connector is connected with an external liquid supply system, a plurality of universal nozzles communicated with the inner cavity are uniformly installed on the inner wall of the annular spraying cavity structure 44 along the circumferential direction, the upper flange 42 is horizontally arranged in a fixed connection mode at the bottom of the upper annular supporting plate 41, and the lower end face of the upper flange 42 is fixedly connected with the rubber ring 43.
Further, the liquid collecting assembly 5 comprises a lower annular supporting plate 51, a lower flange 52, a lower rubber ring 53, an annular air bag sealing structure 54, a corrugated telescopic hose-shaped structure 55 and two lower fixing frames 57, the lower annular supporting plate 51 is horizontally sleeved on the lower portion of a test piece to be tested, two sides of the outer wall of the lower annular supporting plate 51 are respectively installed on two upright posts of the rectangular steel structure frame 1 through the two lower fixing frames 57, the annular air bag sealing structure 54 is coaxially fixed on the inner wall of the lower annular supporting plate 51, an air inlet joint communicated with an inner cavity is installed on the outer wall of the annular air bag sealing structure 54, the air inlet joint is connected with an external air supply system, the diameter of an inner hole of the annular air bag sealing structure 54 is smaller than the outer contour diameter of the test piece to be tested in a full-air state, the top of the lower annular supporting plate 51 is connected with the lower end of the corrugated telescopic hose-shaped structure 55, the upper end of the corrugated telescopic hose-shaped structure 55 is connected with the lower flange 52 which is horizontally arranged, the upper end face of the lower flange 52 is fixedly connected with the lower rubber ring 53, a drainage joint is installed at the bottom of the annular air bag sealing structure 54, and extends to penetrate through the annular air bag sealing structure 54 and extends to refer to the upper portion of the annular air bag sealing structure 54, and the drainage joint is connected with the annular air bag sealing structure 54 in a sealing mode.
Further, the bellows-type flexible hose-shaped structure 55 comprises a plurality of intermediate flanges 551 and a plurality of flexible waterproof sealing sleeves 552, wherein the plurality of intermediate flanges 551 are sequentially and horizontally coaxially arranged between the lower flange 52 and the lower annular supporting plate 51 from top to bottom, one flexible waterproof sealing sleeve 552 is arranged between every two adjacent intermediate flanges 551, two ends of each flexible waterproof sealing sleeve 552 are respectively and fixedly connected with the corresponding intermediate flange 551 in a sealing manner, one flexible waterproof sealing sleeve 552 is connected between the lower flange 52 and the adjacent intermediate flange 551 in a sealing manner, and the lower annular supporting plate 51 is fixedly connected with the adjacent intermediate flange 551 in a sealing manner.
Further, the liquid collecting assembly 5 further comprises two guide posts 56, two guide post installation blind holes are symmetrically formed in the upper end face of the lower annular supporting plate 51 and located on two sides of the inner hole, the lower ends of the two guide posts 56 are respectively vertically inserted into the two guide post installation blind holes of the lower annular supporting plate 51, a first guide through hole which is in sliding fit with the two guide posts 56 is formed in each intermediate flange 551, and the plurality of intermediate flanges 551 are sleeved on the two guide posts 56 from top to bottom through the guide through holes.
Further, two second guiding through holes matched with the guiding columns 56 are formed in the upper flange 42, two third guiding through holes matched with the guiding columns 56 are formed in the upper annular supporting plate 41, the upper ends of the two guiding columns 56 are respectively vertically inserted into the second guiding through holes of the upper flange 42 and the third guiding through holes of the upper annular supporting plate 41, and the upper flange 42 and the lower flange 52 are detachably and hermetically connected through a plurality of flange connecting bolts.
Further, go up clamping assembly 2 and include clamping chuck 21, center pivot 22, bearing support 23, four screw rod connecting pieces 24 and four screw support ejector pin 25, clamping chuck 21 upper surface center processing has chuck center hole 211, and the inside vertical cartridge of center pivot 22 has center pivot 22, center pivot 22 passes through bearing support 23 rotatable mounting on clamping chuck 21, and two rings of mounting hole groups have been seted up radially from inside to outside to clamping chuck 21 upper surface around the chuck center hole 211, including four convex through-holes 212 along the circumferencial direction evenly arranged in every ring of mounting hole group, four screw rod connecting pieces 24's upper portion screw rod upper end respectively cartridge in the convex through-hole 212 of round mounting hole group wherein, two lock nuts that are located clamping chuck 21 upper and lower both sides are installed to the screw rod of every screw rod connecting piece 24 respectively on the screw rod, and two lock nuts and clamping chuck 21 fixed connection about, the connecting plate screw hole has been seted up along the horizontal direction on the lower part connecting plate side face of every screw rod connecting piece 24, the screw support screw rod supporting pin 25 other end, the inside pin hole is seted up along radial inside to the screw rod.
Further, one end of the spiral supporting mandril 25 is fixed with a bowl-shaped rubber support leg, and an opening of the bowl-shaped rubber support leg faces to a test piece to be tested.
Further, the upper driving assembly comprises a servo motor 61, a motor mounting seat 62, a driving bevel gear 63 and a driven bevel gear 64, wherein the driven bevel gear 64 is fixedly sleeved on the shaft shoulder of the upper end of the central rotating shaft 22 through a flat key, the driven bevel gear 64 is meshed with the driving bevel gear 63, the driving bevel gear 63 is fixedly sleeved on the shaft shoulder of the end part of a motor shaft of the servo motor 61 through a flat key, and the servo motor 61 is mounted on the upper surface of the upper cross beam 11 of the rectangular steel structure frame 1 through the motor mounting seat 62.
Further, the upper annular support plate 41, the upper flange 42, the annular spray cavity structure 44, the universal nozzle, the lower annular support plate 51, the lower flange 52 and the intermediate flange 551 are all made of stainless steel materials.
Compared with the prior art, the invention has the following effects:
1. the invention is used for realizing the torsion resistance experiment of the fiber concrete initial torsion member scaling model, and has two functions of simulating a raining environment and simulating a soaking environment. The torsional strength of the fiber concrete initial torsion member scaling model can be measured under different simulation environments.
The shower assembly 4 is used for simulating a raining environment, liquid such as pre-configured acid rain solution is injected into the inner cavity of the annular shower cavity structure 44 through the liquid supply system, liquid in the inner cavity is sprayed on the surface of the test piece to be tested through a plurality of universal nozzles distributed around the test piece to be tested, the test piece to be tested is an initial torsion component with an irregular shape, the shape of the test piece to be tested is adapted by adjusting the inflation amount and the air pressure in the inner cavity of the annular air bag sealing structure 54 at the bottom of the liquid collection assembly 5, the annular air bag sealing structure 54 is used for sealing and wrapping the test piece to be tested, the material of the air bag can be made of rubber or silica gel, when the raining environment is simulated, the corrugated flexible tubular structure 55 is in a contracted state, a sealing groove with a smaller volume is formed among the corrugated flexible tubular structure 55, the annular air bag sealing structure 54 and the test piece to be tested, a drainage joint at the bottom of the annular air bag sealing structure 54 is required to be opened when the raining environment is simulated, the drainage joint is connected with a liquid storage tank in the liquid supply system through an external pipeline, and recycling of the liquid is realized under the action of the water pump.
By combining the liquid collecting component 5 with the liquid spraying component 4, the device is used for simulating a water soaking environment. When the immersion environment is simulated, the corrugated flexible hose-shaped structure 55 is in an extending state, the lower flange 52 of the liquid collecting component 5 is in sealing connection with the upper flange 42 of the liquid spraying component 4 through a connecting piece, a sealing cavity with larger volume is formed among the corrugated flexible hose-shaped structure 55, the annular air bag sealing structure 54 and the workpiece to be tested, the drainage connector at the bottom of the annular air bag sealing structure 54 is required to be closed when the immersion environment is simulated, and liquid is stored in the sealing cavity, so that the middle section of the test piece to be tested is immersed in the liquid.
2. The invention can apply shearing force to the fiber concrete initial torsion member scaling model, namely, the upper driving component and the lower driving component are respectively applied to the upper part and the lower part of the fiber concrete initial torsion member scaling model by two directions, so that the upper part and the lower part of the fiber concrete initial torsion member scaling model are relatively displaced along the respective force application directions. Simultaneously, torque sensors arranged between the upper clamping assembly 2 and the upper driving assembly and between the lower clamping assembly 3 and the lower driving assembly respectively measure the torque applied by the torque sensors; and detecting the stress at different positions of the test piece to be tested through a plurality of strain gauge sensors arranged on the outer surface of the test piece to be tested.
3. The invention designs the upper clamping component 2 and the lower clamping component 3 which are specially used for fixing the initial torsion component with irregular shape, the circular arc through holes 212 are processed at different positions on the clamping chuck 21 to adapt to the sizes of different initial torsion components and different clamping positions of the same initial torsion component, meanwhile, the end effector for clamping the initial torsion component is designed into a threaded connection mode, the irregular positioning surface of a test piece to be tested can be self-adapted, and bowl-shaped rubber support legs are designed at the tail end of the spiral supporting ejector rod 25, so that the bowl-shaped rubber support legs remove internal air under the drive of the spiral supporting ejector rod 25, the bowl-shaped rubber support legs are adsorbed on the surface of the test piece to be tested, the slipping phenomenon in the loading process is avoided, and the experimental precision is effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a mechanical property testing device of a fiber concrete initial torsion member scaling model in a rainy environment simulation;
FIG. 2 is a schematic structural diagram of a mechanical property testing device of a fiber concrete initial torsion member scaling model in the simulated water immersion environment of the invention;
fig. 3 is a top view of the clamping chuck 21 of the upper clamping assembly 2 of the present invention;
FIG. 4 is a cross-sectional view of FIG. 3 at A-A;
fig. 5 is a schematic view of the structure of the shower assembly 4 of the present invention;
fig. 6 is a schematic view of the structure of the liquid collecting assembly 5 of the present invention;
fig. 7 is a schematic view of the structure of the present invention when the air bag support bracket 58 supports the annular air bag sealing structure 54.
In the figure: 1-a rectangular steel structure frame; 11-an upper cross beam; 12-a lower cross beam; 13-a base; 2-an upper clamping assembly; 21-clamping a chuck; 211-chuck center hole; 212-circular arc through holes; 22-a central spindle; 23-bearing support; 24-screw connection; 25-spiral supporting ejector rods; 3-a lower clamping assembly; 4-a liquid spraying component; 41-an upper annular support plate; 42-upper flange; 43-upper rubber ring; 44-an annular spray cavity structure; 45-upper fixing frame; 5-a liquid collecting component; 51-a lower annular support plate; 52-a lower flange; 53-lower rubber ring; 54-annular bladder sealing structure; 55-corrugated flexible hose-like structure; 551-middle flange; 552-flexible watertight sleeve; 56-a guide post; 57-lower fixing frame; 61-a servo motor; 62-a motor mount; 63-drive bevel gear; 64-driven bevel gear.
Detailed Description
The first embodiment is as follows: referring to fig. 1 to 6, a mechanical performance testing device for a fiber concrete initial torsion member scaling model of the present embodiment is described, and the mechanical performance testing device includes a rectangular steel structure frame 1, an upper clamping assembly 2, a lower clamping assembly 3, a shower assembly 4, a liquid collecting assembly 5, an upper driving assembly, a lower driving assembly, two torque sensors and a plurality of strain gauge sensors, wherein the rectangular steel structure frame 1 is vertically arranged on a workbench surface, the upper clamping assembly 2 and the lower clamping assembly 3 are sequentially and relatively arranged inside the rectangular steel structure frame 1 from top to bottom, a test piece to be tested is vertically arranged between the upper clamping assembly 2 and the lower clamping assembly 3, and a plurality of strain gauge sensors are sequentially adhered to the outer surface of the test piece to be tested from top to bottom;
the upper clamping assembly 2 comprises an upper connecting part and an upper clamping part, the upper clamping assembly 2 is arranged at the bottom of an upper cross beam 11 of the rectangular steel structure frame 1 through the upper connecting part, the top end of the upper connecting part penetrates through the upper cross beam 11 and is connected with the output end of an upper driving assembly, the upper driving assembly is arranged on the upper surface of the upper cross beam 11 and is used for driving the upper clamping assembly 2 to rotate forwards or reversely, the upper clamping assembly 2 is connected with the top end of a test piece to be tested through the upper clamping part, and a torque sensor is connected between the upper clamping assembly 2 and the upper driving assembly;
The lower clamping assembly 3 comprises a lower connecting part and a lower clamping part, the lower clamping assembly 3 is arranged at the top of a lower cross beam 12 of the rectangular steel structure frame 1 through the lower connecting part, the bottom end of the lower connecting part penetrates through the lower cross beam 12 and is connected with the output end of a lower driving assembly, the lower driving assembly is arranged on the upper surface of a base 13 of the rectangular steel structure frame 1 and is used for driving the lower clamping assembly 3 to rotate reversely or positively, the lower clamping assembly 3 is connected with the bottom end of a test piece to be tested through the lower clamping part, and a torque sensor is connected between the lower clamping assembly 3 and the lower driving assembly;
go up clamp assembly 2 and have arranged drenching liquid subassembly 4 and collection liquid subassembly 5 down in proper order between the clamp assembly 3 down, drenching liquid subassembly 4 is located test piece upper portion that awaits measuring, collection liquid subassembly 5 is located test piece lower part that awaits measuring, drenching liquid subassembly 4 and collection liquid subassembly 5 are all installed on rectangle steel construction frame 1's both sides stand, drenching liquid subassembly 4's inlet and outside liquid feed system and be connected, drenching liquid subassembly 4's liquid outlet orientation test piece that awaits measuring, collection liquid subassembly 5 wholly is telescopic hose structure, collection liquid subassembly 5 bottom is equipped with inflatable annular seal bag body, the air inlet and the outside air feed system of inflatable annular seal bag body are connected, inflatable annular seal bag body cover is established in test piece lower part that awaits measuring, inflatable annular seal bag body is sealed laminating with test piece outer wall that awaits measuring under the state.
The second embodiment is as follows: referring to fig. 1, fig. 2 and fig. 5, the shower assembly 4 of this embodiment includes an upper annular support plate 41, an upper flange 42, an upper rubber ring 43, an annular spray cavity structure 44, two upper fixing frames 45 and a plurality of universal nozzles, the upper annular support plate 41 is horizontally sleeved on the upper portion of the test piece to be tested, two sides of the outer wall of the upper annular support plate 41 are respectively installed on two side upright posts of the rectangular steel structure frame 1 through the two upper fixing frames 45, the inner wall of the upper annular support plate 41 is coaxially fixed with the annular spray cavity structure 44, the outer wall of the annular spray cavity structure 44 is provided with a liquid inlet joint communicated with an inner cavity, the liquid inlet joint is connected with an external liquid supply system, a plurality of universal nozzles communicated with the inner cavity are uniformly installed on the inner wall of the annular spray cavity structure 44 along the circumferential direction, the bottom of the upper annular support plate 41 is fixedly connected with the horizontally arranged upper flange 42, and the lower end surface of the upper flange 42 is fixedly connected with the upper rubber ring 43. So set up, drenching liquid subassembly 4 is used for simulating raining environment, and liquid such as the acid rain solution that will dispose in advance is poured into the inner chamber of annular spraying cavity structure 44 through the liquid feed system, and the liquid in the inner chamber is sprayed on the test piece surface that awaits measuring through a plurality of universal nozzles that distribute around the test piece that awaits measuring. Other compositions and connection relationships are the same as those of the first embodiment.
In this embodiment, the liquid supply system is the same as that for providing the liquid such as the prepared acid rain solution for the shower assembly 4, and the acid rain solution is prepared by referring to the local climate environment, and the preparation method of the acid rain solution is the prior art and will not be described here again. The liquid supply system consists of a water inlet pump, a drainage pump, an additive feeding pump, an additive circulating pump, a flushing water pump, a pipeline, accessories, a liquid storage tank, a liquid level meter and the like. The liquid supply system is an existing conventional liquid supply system, and only needs to realize a liquid supply function, and the description is omitted here.
And a third specific embodiment: in connection with fig. 1, fig. 2 and fig. 6, the liquid collecting assembly 5 of this embodiment includes a lower annular supporting plate 51, a lower flange 52, a lower rubber ring 53, an annular air bag sealing structure 54, a bellows-type flexible hose structure 55 and two lower fixing frames 57, the lower annular supporting plate 51 is horizontally sleeved on the lower portion of a test piece to be tested, two sides of the outer wall of the lower annular supporting plate 51 are respectively installed on two side columns of a rectangular steel structure frame 1 through the two lower fixing frames 57, the annular air bag sealing structure 54 is coaxially fixed on the inner wall of the lower annular supporting plate 51, an air inlet joint communicated with an inner cavity is installed on the outer wall of the annular air bag sealing structure 54, the air inlet joint is connected with an external air supply system, the diameter of an inner hole of the annular air bag sealing structure 54 is smaller than the outer contour diameter of the test piece to be tested in a full air state, the top of the lower annular supporting plate 51 is connected with the lower end of the bellows-type flexible hose structure 55, the upper end of the bellows-type flexible hose structure 55 is connected with the lower flange 52 horizontally arranged, a drainage joint is installed at the bottom of the annular air bag sealing structure 54, and the drainage joint penetrates through the annular air bag sealing structure 54 extends through the annular air bag sealing structure 54, and extends through the annular air bag sealing structure and is connected with the air bag sealing structure and air bag sealing structure. So set up, because the test piece that awaits measuring is the initial torsion component of irregular shape, through the volume of aerifing and the atmospheric pressure in the annular gasbag seal structure 54 inner chamber of adjustment collection subassembly 5 bottom, adapt to the shape of test piece that awaits measuring, make annular gasbag seal structure 54 seal the parcel with the test piece that awaits measuring, the material of gasbag can select rubber or silica gel material, when simulating raining environment, corrugated flexible hose form structure 55 is in the shrink state, form a seal groove that the volume is less between corrugated flexible hose form structure 55 this moment, annular gasbag seal structure 54 and the work piece that awaits measuring, need open the drainage joint of annular gasbag seal structure 54 bottom when simulating raining environment, the drainage joint is connected with the liquid reserve tank in the confession liquid system through external pipeline, realize the cyclic utilization of liquid under the effect of water pump. Other compositions and connection relationships are the same as those of the first or second embodiment.
In this embodiment, the air supply system is used for providing air and other gases for the annular air bag sealing structure 54, and the air supply system is composed of an air compressor, an air pipe, accessories, an air storage tank electromagnetic valve, an air cylinder, an air source triplet and the like. The air supply system is an existing conventional air supply system, and only needs to realize the air supply function, and the description is omitted here.
The specific embodiment IV is as follows: referring to fig. 1, 2 and 6, the bellows-type flexible hose structure 55 of this embodiment includes a plurality of intermediate flanges 551 and a plurality of flexible waterproof sealing sleeves 552, the plurality of intermediate flanges 551 are sequentially and horizontally arranged between the lower flange 52 and the lower annular support plate 51 coaxially from top to bottom, a flexible waterproof sealing sleeve 552 is disposed between each two adjacent intermediate flanges 551, two ends of the flexible waterproof sealing sleeve 552 are respectively and fixedly connected with the corresponding intermediate flange 551 in a sealing manner, a flexible waterproof sealing sleeve 552 is connected between the lower flange 52 and the adjacent intermediate flange 551 in a sealing manner, and the lower annular support plate 51 is fixedly connected with the adjacent intermediate flange 551 in a sealing manner. So set up, through with liquid collection subassembly 5 with drench after liquid subassembly 4 the combination, be used for the simulation environment of soaking. When the immersion environment is simulated, the corrugated flexible hose-shaped structure 55 is in an extending state, the lower flange 52 of the liquid collecting component 5 is in sealing connection with the upper flange 42 of the liquid spraying component 4 through a connecting piece, a sealing cavity with larger volume is formed among the corrugated flexible hose-shaped structure 55, the annular air bag sealing structure 54 and the workpiece to be tested, the drainage connector at the bottom of the annular air bag sealing structure 54 is required to be closed when the immersion environment is simulated, and liquid is stored in the sealing cavity, so that the middle section of the test piece to be tested is immersed in the liquid. Other compositions and connection relationships are the same as those of the first, second or third embodiments.
Fifth embodiment: referring to fig. 1, fig. 2 and fig. 6, the liquid collecting assembly 5 of this embodiment further includes two guide posts 56, two guide post mounting blind holes are symmetrically machined on the upper end surface of the lower annular supporting plate 51 at two sides of the inner hole, the lower ends of the two guide posts 56 are respectively vertically inserted into the two guide post mounting blind holes of the lower annular supporting plate 51, a first guide through hole in sliding fit with the two guide posts 56 is machined on each intermediate flange 551, and a plurality of intermediate flanges 551 are sleeved on the two guide posts 56 through the guide through holes from top to bottom. So set up, the guide post 56 can realize the accurate butt joint of the lower flange 52 of liquid collecting assembly 5 and the upper flange 42 of drenching liquid subassembly 4, and the guide post 56 can play the effect of increasing intensity to middle flange 551 simultaneously, when the inside water collection of liquid collecting assembly 5, the shape of corrugated flexible hose form structure 55 that keeps that can be better. Other compositions and connection relationships are the same as those of the first, second, third or fourth embodiments.
Specific embodiment six: referring to fig. 1, 2, 5 and 6, in this embodiment, two second guide through holes matched with the guide posts 56 are formed in the upper flange 42, two third guide through holes matched with the guide posts 56 are formed in the upper annular support plate 41, and the upper ends of the two guide posts 56 are vertically inserted into the second guide through holes of the upper flange 42 and the third guide through holes of the upper annular support plate 41 respectively, and the upper flange 42 and the lower flange 52 are detachably and hermetically connected through a plurality of flange connecting bolts. So set up, the guide post 56 can realize the accurate butt joint of the lower flange 52 of liquid collection subassembly 5 and the upper flange 42 of drenching liquid subassembly 4. Other compositions and connection relationships are the same as those of the first, second, third, fourth or fifth embodiments.
Seventh embodiment: referring to fig. 1 to 4, the upper clamping assembly 2 of this embodiment includes a clamping chuck 21, a central rotating shaft 22, a bearing support 23, four screw rod connectors 24 and four screw rod support ejector rods 25, a central chuck hole 211 is machined in the center of the upper surface of the clamping chuck 21, the central rotating shaft 22 is vertically inserted in the central rotating shaft 22, the central rotating shaft 22 is rotatably mounted on the clamping chuck 21 through the bearing support 23, two circle of mounting hole groups are radially formed in the upper surface of the clamping chuck 21 around the central chuck hole 211 from inside to outside, each circle of mounting hole groups includes four circular arc through holes 212 uniformly distributed along the circumferential direction, the upper ends of the upper screws of the four screw rod connectors 24 are respectively inserted into the circular arc through holes 212 in one circle of the mounting hole groups, two locking nuts located on the upper side and the lower side of the clamping chuck 21 are respectively and spirally mounted on the screws of each screw rod connector 24, the screw rod connectors 24 are fixedly connected with the clamping chuck 21 through the upper locking nut and the lower locking nut, a threaded hole is formed in the horizontal direction on the side end face of the lower connecting plate side of each screw rod connector 24, the connecting plate is internally provided with a threaded hole, the screw rod support pin 25 is spirally mounted in the other end pin hole is formed in the side wall of the ejector rod support pin hole 25. The upper clamping assembly 2 and the lower clamping assembly 3 are specially used for fixing initial torsion members in irregular shapes, the circular arc through holes 212 are machined in different positions on the clamping chuck 21 to adapt to the sizes of different initial torsion members and different clamping positions of the same initial torsion member, and meanwhile, the end effector for clamping the initial torsion members is designed to be in threaded connection, so that the irregular positioning surface of a test piece to be tested can be self-adapted. Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth or sixth embodiments.
In this embodiment, the structure of the upper clamping assembly 2 is the same as that of the lower clamping assembly 3, and the composition and connection relationship of the lower clamping assembly 3 are referred to the upper clamping assembly 2, which is not described herein.
Eighth embodiment: in the present embodiment, a bowl-shaped rubber foot is fixed to one end of the screw support rod 25, and the opening of the bowl-shaped rubber foot faces to a test piece to be tested, as described with reference to fig. 1 and 2. So set up, design into bowl form rubber stabilizer blade at spiral support ejector pin 25 end for bowl form rubber stabilizer blade is got rid of inside air under the drive of spiral support ejector pin 25, and then adsorbs bowl form rubber stabilizer blade on the test piece surface that awaits measuring, avoids taking place the phenomenon of skidding at the loading in-process, has improved experimental accuracy effectively. Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth or seventh embodiments.
Detailed description nine: referring to fig. 1 and 2, the upper driving assembly of the present embodiment includes a servo motor 61, a motor mount 62, a drive bevel gear 63 and a driven bevel gear 64, the driven bevel gear 64 is fixedly mounted on an upper end shoulder of the central rotating shaft 22 by a flat key, the driven bevel gear 64 is engaged with the drive bevel gear 63, the drive bevel gear 63 is fixedly mounted on a shaft shoulder of a motor shaft end of the servo motor 61 by a flat key, and the servo motor 61 is mounted on an upper surface of the upper beam 11 of the rectangular steel structure frame 1 by the motor mount 62. The device is used for applying shearing force to the fiber concrete initial torsion member scaling model, namely, the upper driving assembly and the lower driving assembly are respectively used for applying force to the upper part and the lower part of the fiber concrete initial torsion member scaling model in two directions, so that the upper part and the lower part of the fiber concrete initial torsion member scaling model are relatively displaced along the respective force application directions. Simultaneously, torque sensors arranged between the upper clamping assembly 2 and the upper driving assembly and between the lower clamping assembly 3 and the lower driving assembly respectively measure the torque applied by the torque sensors; and detecting the stress at different positions of the test piece to be tested through a plurality of strain gauge sensors arranged on the outer surface of the test piece to be tested. Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh or eighth embodiments.
In this embodiment, the upper driving assembly and the lower driving assembly have the same structure, and the components and connection relation of the lower driving assembly refer to the upper driving assembly, which is not described herein.
Detailed description ten: the present embodiment is explained with reference to fig. 1 to 6, in which the upper annular support plate 41, the upper flange 42, the annular shower cavity structure 44, the universal nozzle, the lower annular support plate 51, the lower flange 52, and the intermediate flange 551 are made of stainless steel materials. By means of the arrangement, corrosion of liquid on the surface of the component can be avoided by adopting stainless steel, and corrosion prevention can be realized by adopting a mode of coating a corrosion prevention layer on the surface. Other compositions and connection relationships are the same as those of the one, two, three, four, five, six, seven, eight or nine embodiments.
Eleventh embodiment: referring to fig. 6 and 7, the liquid collecting assembly 5 of this embodiment further includes an air bag supporting frame 58, the air bag supporting frame 58 is located below the annular air bag sealing structure 54, the air bag supporting frame 58 includes an upper supporting ring plate 581, a lower supporting ring plate 582, a plurality of ring plate supporting columns 583 and a plurality of expansion plates, the upper supporting ring plate 581 and the lower supporting ring plate 582 are coaxially and horizontally arranged below the annular air bag sealing structure 54 from top to bottom, a plurality of ring plate supporting columns 583 are uniformly and obliquely arranged between the upper supporting ring plate 581 and the lower supporting ring plate 582 along the circumferential direction, the upper end of the ring plate supporting columns 583 is fixedly welded to the lower surface of the upper supporting ring plate 581, a plurality of radial sliding grooves are uniformly processed on the inner hole side surface of the upper supporting ring plate 581 along the circumferential direction, expansion plates are slidably inserted in the radial sliding grooves, the inner hole of the upper supporting ring plate 581 is an avoidance hole of a test piece to be tested, the lower supporting ring plate 582 is an avoidance hole of the lower clamping assembly 3, the upper supporting ring plate 581 is provided with an avoidance hole of the lower clamping assembly 581, and the upper supporting ring plate 581 is used for processing an air inlet connector and a drain joint 54. So set up, annular gasbag seal structure 54 has the effect of sealed and increase supporting strength under the state of aerifing, form one volume great sealed cavity inside injection liquid between being in the corrugated flexible hose form structure 55 of extension state, annular gasbag seal structure 54 and the work piece that awaits measuring after, the annular gasbag seal structure 54 that is located sealed cavity bottom bears the weight of liquid, through setting up gasbag support frame 58 in annular gasbag seal structure 54 bottom, can play the effect of supporting annular gasbag seal structure 54 and top liquid, and then can not influence the sealed effect between annular gasbag seal structure 54 and the work piece that awaits measuring. The insertion depth of the expansion plate in the radial sliding groove of the upper support ring plate 581 can also be adjusted according to the shape of the workpiece to be measured. Other compositions and connection relationships are the same as those of the one, two, three, four, five, six, seven, eight, nine or ten embodiments.
Principle of operation
The working principle of the mechanical property testing device of the fiber concrete initial torsion member scaling model of the invention is described with reference to fig. 1 to 7:
clamping a workpiece to be tested:
the upper clamping assembly 2 and the lower clamping assembly 3 are adopted to clamp a workpiece to be tested, arc-shaped through holes 212 are machined at different positions on the clamping chuck 21 according to the size of the workpiece to be tested, the screw connecting piece 24 is fixed, the bowl-shaped rubber support legs are driven by the screw supporting ejector rods 25 to remove internal air by adjusting the screwing depth of the screw supporting ejector rods 25, and then the bowl-shaped rubber support legs are adsorbed on the surface of the workpiece to be tested, so that the fixed clamping of the upper end and the lower end of the workpiece to be tested is realized;
and (II) performing torsion resistance experiments in a simulated rainy environment:
the shape of the test piece to be tested is adapted by adjusting the inflation amount and the air pressure in the inner cavity of the annular air bag sealing structure 54 at the bottom of the liquid collecting assembly 5, so that the annular air bag sealing structure 54 is used for sealing and wrapping the test piece to be tested, a sealing groove with smaller volume is formed among the corrugated flexible hose-shaped structure 55, the annular air bag sealing structure 54 and the test piece to be tested, a drainage joint at the bottom of the annular air bag sealing structure 54 is opened, the drainage joint is connected with a liquid storage tank in a liquid supply system through an external pipeline, the liquid such as pre-configured acid rain solution is injected into the inner cavity of the annular spraying cavity structure 44 through the liquid supply system, and the liquid in the inner cavity is sprayed on the surface of the test piece to be tested through a plurality of universal nozzles distributed around the test piece to be tested.
When the preset rain time is reached, the upper driving component and the lower driving component are respectively adopted to apply force to the upper part and the lower part of the fiber concrete initial torsion component scaling model in two directions, so that the upper part and the lower part of the fiber concrete initial torsion component scaling model are relatively displaced along the respective force application directions. Simultaneously, torque sensors arranged between the upper clamping assembly 2 and the upper driving assembly and between the lower clamping assembly 3 and the lower driving assembly respectively measure the torque applied by the torque sensors; and detecting the stress at different positions of the test piece to be tested through a plurality of strain gauge sensors arranged on the outer surface of the test piece to be tested.
And (III) performing torsion resistance experiments in a simulated water immersion environment:
the shape of the test piece to be tested is adapted by adjusting the inflation amount and the air pressure in the inner cavity of the annular air bag sealing structure 54 at the bottom of the liquid collecting assembly 5, so that the annular air bag sealing structure 54 seals and wraps the test piece to be tested, the lower flange 52 of the liquid collecting assembly 5 is in sealing connection with the upper flange 42 of the liquid spraying assembly 4 through a connecting piece, and the combination of the liquid collecting assembly 5 and the liquid spraying assembly 4 is realized. At this time, a sealing cavity with larger volume is formed among the corrugated flexible hose-shaped structure 55, the annular air bag sealing structure 54 and the workpiece to be tested, the drainage joint at the bottom of the annular air bag sealing structure 54 is closed, and the liquid such as the pre-configured acid rain solution is injected into the sealing cavity through the liquid supply system and the liquid spraying component 4, so that the middle section of the workpiece to be tested is soaked in the liquid.
When the preset soaking time is reached, the upper driving component and the lower driving component are respectively adopted to apply force to the upper part and the lower part of the fiber concrete initial torsion component scaling model in two directions, so that the upper part and the lower part of the fiber concrete initial torsion component scaling model are relatively displaced along the respective force application directions. Simultaneously, torque sensors arranged between the upper clamping assembly 2 and the upper driving assembly and between the lower clamping assembly 3 and the lower driving assembly respectively measure the torque applied by the torque sensors; and detecting the stress at different positions of the test piece to be tested through a plurality of strain gauge sensors arranged on the outer surface of the test piece to be tested.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A mechanical property testing device of a fiber concrete initial torsion member scaling model is characterized in that: the device comprises a rectangular steel structure frame (1), an upper clamping assembly (2), a lower clamping assembly (3), a liquid spraying assembly (4), a liquid collecting assembly (5), an upper driving assembly, a lower driving assembly, two torque sensors and a plurality of strain gauge sensors, wherein the rectangular steel structure frame (1) is vertically arranged on a workbench surface, the upper clamping assembly (2) and the lower clamping assembly (3) are sequentially and relatively arranged inside the rectangular steel structure frame (1) from top to bottom, a test piece to be tested is vertically arranged between the upper clamping assembly (2) and the lower clamping assembly (3), and a plurality of strain gauge sensors are sequentially adhered to the outer surface of the test piece to be tested from top to bottom;
The upper clamping assembly (2) comprises an upper connecting part and an upper clamping part, the upper clamping assembly (2) is arranged at the bottom of an upper cross beam (11) of the rectangular steel structure frame (1) through the upper connecting part, the top end of the upper connecting part penetrates through the upper cross beam (11) and is connected with the output end of an upper driving assembly, the upper driving assembly is arranged on the upper surface of the upper cross beam (11), the upper driving assembly is used for driving the upper clamping assembly (2) to rotate forwards or reversely, the upper clamping assembly (2) is connected with the top end of a test piece to be tested through the upper clamping part, and a torque sensor is connected between the upper clamping assembly (2) and the upper driving assembly;
the lower clamping assembly (3) comprises a lower connecting part and a lower clamping part, the lower clamping assembly (3) is arranged at the top of a lower cross beam (12) of the rectangular steel structure frame (1) through the lower connecting part, the bottom end of the lower connecting part penetrates through the lower cross beam (12) and is connected with the output end of a lower driving assembly, the lower driving assembly is arranged on the upper surface of a base (13) of the rectangular steel structure frame (1), the lower driving assembly is used for driving the lower clamping assembly (3) to rotate reversely or positively, the lower clamping assembly (3) is connected with the bottom end of a test piece to be tested through the lower clamping part, and a torque sensor is connected between the lower clamping assembly (3) and the lower driving assembly;
the liquid spraying assembly (4) and the liquid collecting assembly (5) are sequentially arranged between the upper clamping assembly (2) and the lower clamping assembly (3) from top to bottom, the liquid spraying assembly (4) is positioned at the upper part of a test piece to be tested, the liquid collecting assembly (5) is positioned at the lower part of the test piece to be tested, the liquid spraying assembly (4) and the liquid collecting assembly (5) are both arranged on two side upright posts of the rectangular steel structure frame (1), a liquid inlet of the liquid spraying assembly (4) is connected with an external liquid supply system, a liquid outlet of the liquid spraying assembly (4) faces the test piece to be tested, the liquid collecting assembly (5) is of a telescopic hose structure, an inflatable annular sealing bag body is arranged at the bottom of the liquid collecting assembly (5), an air inlet of the inflatable annular sealing bag body is connected with an external air supply system, and the inflatable annular sealing bag body is sleeved at the lower part of the test piece to be tested and is in sealing fit with the outer wall of the test piece to be tested in an inflated state;
The upper clamping assembly (2) comprises a clamping chuck (21), a central rotating shaft (22), bearing supporting pieces (23), four screw connecting pieces (24) and four screw supporting ejector rods (25), wherein a chuck central hole (211) is machined in the center of the upper surface of the clamping chuck (21), the central rotating shaft (22) is vertically inserted in the central rotating shaft (22), the central rotating shaft (22) is rotatably arranged on the clamping chuck (21) through the bearing supporting pieces (23), two circle of installation hole groups are radially formed in the upper surface of the clamping chuck (21) around the chuck central hole (211) from inside to outside, each circle of installation hole groups comprises four circular arc through holes (212) uniformly distributed along the circumferential direction, the upper end of each screw connecting piece (24) is respectively inserted in the circular arc through holes (212) in one circle of installation hole groups, two locking nuts positioned on the upper side and the lower side of the clamping chuck (21) are respectively in a spiral manner, each screw connecting piece (24) is fixedly connected with the clamping chuck (21) through the upper locking nut and the lower locking nut, the other end face of each screw connecting piece (24) is provided with a connecting plate (25) which is horizontally provided with a connecting plate along the radial direction, the upper end face of the connecting plate is provided with a connecting plate (25), a pin rod is inserted into the pin hole; one end of the spiral supporting ejector rod (25) is fixed with a bowl-shaped rubber support leg, and an opening of the bowl-shaped rubber support leg faces to a test piece to be tested; the test piece to be tested is a fiber concrete initial torsion member scaling model;
The liquid collecting assembly (5) further comprises an air bag supporting frame (58), the air bag supporting frame (58) is located below the annular air bag sealing structure (54), the air bag supporting frame (58) comprises an upper supporting annular plate (581), a plurality of radial sliding grooves are uniformly formed in the side face of an inner hole of the upper supporting annular plate (581) along the circumferential direction, a telescopic plate is slidably inserted in each radial sliding groove, and the inner hole of the upper supporting annular plate (581) is an avoidance hole of a test piece to be tested;
the liquid spraying assembly (4) comprises an upper annular supporting plate (41), an upper flange (42), an upper rubber ring (43), an annular spraying cavity structure (44), two upper fixing frames (45) and a plurality of universal nozzles, wherein the upper annular supporting plate (41) is horizontally sleeved on the upper part of a test piece to be tested, two sides of the outer wall of the upper annular supporting plate (41) are respectively installed on upright posts on two sides of a rectangular steel structure frame (1) through the two upper fixing frames (45), the annular spraying cavity structure (44) is coaxially fixed on the inner wall of the upper annular supporting plate (41), a liquid inlet joint communicated with an inner cavity is installed on the outer wall of the annular spraying cavity structure (44), the liquid inlet joint is connected with an external liquid supply system, a plurality of universal nozzles communicated with the inner cavity are uniformly installed on the inner wall of the annular spraying cavity structure (44) along the circumferential direction, the bottom of the upper annular supporting plate (41) is fixedly connected with the horizontally arranged upper flange (42), and the lower end surface of the upper flange (42) is fixedly connected with the upper rubber ring (43);
The liquid collecting component (5) comprises a lower annular supporting plate (51), a lower flange (52), a lower rubber ring (53), an annular air bag sealing structure (54), a corrugated telescopic hose-shaped structure (55) and two lower fixing frames (57), wherein the lower annular supporting plate (51) is horizontally sleeved at the lower part of a test piece to be tested, two sides of the outer wall of the lower annular supporting plate (51) are respectively arranged on two upright posts of the rectangular steel structure frame (1) through the two lower fixing frames (57), the inner wall of the lower annular supporting plate (51) is coaxially fixed with an annular air bag sealing structure (54), the outer wall of the annular air bag sealing structure (54) is provided with an air inlet joint communicated with an inner cavity, the air inlet joint is connected with an external air supply system, the diameter of an inner hole of the annular air bag sealing structure (54) is smaller than the outer contour diameter of the test piece to be tested in a full air state, the top of the lower annular supporting plate (51) is connected with the lower end of the corrugated telescopic hose-shaped structure (55), the upper end of the corrugated telescopic hose-shaped structure (55) is connected with the horizontally arranged lower flange (52), the upper end face of the lower flange (52) is fixedly connected with the lower rubber ring (53), the bottom of the annular air bag sealing structure (54) is provided with a drainage joint, the drainage joint is arranged at the bottom of the annular air bag sealing structure (54), the air inlet joint is connected with the annular air bag sealing structure (54) through the annular air bag sealing structure and extends through the annular air bag sealing structure (54), the drainage joint is in sealing connection with the annular air bag sealing structure (54) in a cementing manner;
The corrugated flexible hose-shaped structure (55) comprises a plurality of middle flanges (551) and a plurality of flexible waterproof sealing sleeves (552), wherein the middle flanges (551) are sequentially and horizontally coaxially arranged between the lower flange (52) and the lower annular supporting plate (51) from top to bottom, one flexible waterproof sealing sleeve (552) is arranged between every two adjacent middle flanges (551), two ends of each flexible waterproof sealing sleeve (552) are respectively and fixedly connected with the corresponding middle flange (551) in a sealing manner, one flexible waterproof sealing sleeve (552) is connected between the lower flange (52) and the adjacent middle flange (551) in a sealing manner, and the lower annular supporting plate (51) is fixedly connected with the adjacent middle flange (551) in a sealing manner.
2. The mechanical property testing device of the fiber concrete initial torsion member scaling model according to claim 1, wherein the mechanical property testing device is characterized in that: the liquid collecting assembly (5) further comprises two guide posts (56), two guide post installation blind holes are symmetrically formed in the upper end face of the lower annular supporting plate (51) and located on two sides of the inner hole, the lower ends of the two guide posts (56) are respectively vertically inserted into the two guide post installation blind holes of the lower annular supporting plate (51), first guide through holes which are in sliding fit with the two guide posts (56) are formed in each middle flange (551), and the middle flanges (551) are sleeved on the two guide posts (56) through the guide through holes from top to bottom.
3. The mechanical property testing device of the fiber concrete initial torsion member scaling model according to claim 2, wherein: the upper flange (42) is provided with two second guide through holes matched with the guide posts (56), the upper annular support plate (41) is provided with two third guide through holes matched with the guide posts (56), the upper ends of the two guide posts (56) are respectively vertically inserted into the second guide through holes of the upper flange (42) and the third guide through holes of the upper annular support plate (41), and the upper flange (42) and the lower flange (52) are detachably and hermetically connected through a plurality of flange connecting bolts.
4. The mechanical property testing device of the fiber concrete initial torsion member scaling model according to claim 1, wherein the mechanical property testing device is characterized in that: the upper driving assembly comprises a servo motor (61), a motor mounting seat (62), a driving bevel gear (63) and a driven bevel gear (64), wherein the driven bevel gear (64) is fixedly sleeved on the upper end shaft shoulder of the central rotating shaft (22) through a flat key, the driven bevel gear (64) is meshed with the driving bevel gear (63), the driving bevel gear (63) is fixedly sleeved on the shaft shoulder of the end part of a motor shaft of the servo motor (61) through the flat key, and the servo motor (61) is mounted on the upper surface of an upper cross beam (11) of the rectangular steel structure frame (1) through the motor mounting seat (62).
5. The mechanical property testing device of the fiber concrete initial torsion member scaling model according to claim 4, wherein the mechanical property testing device is characterized in that: the upper annular supporting plate (41), the upper flange (42), the annular spraying cavity structure (44), the universal nozzle, the lower annular supporting plate (51), the lower flange (52) and the middle flange (551) are all made of stainless steel materials.
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