CN118190794A - Test device for bonding performance of concrete and steel structure - Google Patents
Test device for bonding performance of concrete and steel structure Download PDFInfo
- Publication number
- CN118190794A CN118190794A CN202410622787.9A CN202410622787A CN118190794A CN 118190794 A CN118190794 A CN 118190794A CN 202410622787 A CN202410622787 A CN 202410622787A CN 118190794 A CN118190794 A CN 118190794A
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- gear ring
- gear
- clamping
- concrete
- assembly
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- 238000012360 testing method Methods 0.000 title claims abstract description 72
- 239000004567 concrete Substances 0.000 title claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 230000000712 assembly Effects 0.000 claims abstract description 12
- 238000000429 assembly Methods 0.000 claims abstract description 12
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000004154 testing of material Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000009662 stress testing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a test device for bonding performance of concrete and a steel structure, which belongs to the technical field of material testing, and comprises the following components: the testing machine body is provided with a clamping platform, and the outer edge of the clamping platform forms a gear ring turntable; a drawing assembly for drawing the steel structure; the clamping assemblies comprise a sliding cylinder, clamping jaws are connected in the sliding cylinder in a sliding manner through elastic assemblies, and racks are arranged on the side surfaces of the clamping jaws; the transmission assemblies comprise transmission shafts and transmission gears which are matched with each other, and the transmission gears are matched with the racks; the driving assembly comprises a gear ring, a rotating assembly for driving the gear ring to rotate and a lifting assembly for driving the gear ring to lift, wherein the gear ring is sleeved on the gear ring turntable. The invention can synchronously clamp the test pieces with different sizes in different directions, so that the stress of the test pieces in all directions is uniform, and the test accuracy is improved.
Description
Technical Field
The invention belongs to the technical field of material testing, and particularly relates to a device for testing the bonding performance of concrete and a steel structure.
Background
The steel structure concrete is formed by combining concrete and a steel structure. As is known, concrete has high compressive strength, but weak bending resistance, while steel structure has strong bending resistance and good elastoplasticity, but is easy to destabilize and lose axial compressive resistance when being pressed; the steel structure concrete can structurally combine the advantages of the steel structure concrete and the concrete, the steel structure has the restraint effect on the concrete in the steel structure concrete, so that the compressive strength of the concrete is improved, meanwhile, due to the existence of the concrete, the steel structure is effectively prevented from being locally buckled, the rigidity of the steel structure is improved, and the steel structure concrete play roles together, so that the bearing capacity is greatly improved. The steel structure concrete is used as an emerging combined structure, mainly comprising a pressed component with smaller axial compression and acting force eccentricity, and is widely used in a frame structure. And their ability to work together is mainly due to the effective bonding between the two, which allows the steel structure and concrete to achieve a stress transfer at the interface, thus establishing the working stresses necessary for structural load bearing.
When the bonding stress of the concrete and the steel structure is tested, the test piece is required to be clamped and fixed. However, in the prior art, as disclosed in the patent CN 115629040a, a reinforced concrete interface bonding stress testing device is described in the specification: when the device is used, through the shell, the control unit, the assembly table, the storage bin device, the clamping device, the tension instrument and the converter mechanism, the problems that the existing tension tester is limited in fixing mode of a test piece, can not effectively clamp the test piece according to different widths and sizes and is low in flexibility are avoided. The equipment can adapt to the centre gripping through the cutting ferrule device that is equipped with the side of testing piece, is fit for the testing piece of different width sizes, and the flexibility is higher, runs through in the trompil groove through the roof that is equipped with simultaneously, and then forms locking cooperation with sideslip rail, can form the cooperation of a plurality of directions to the testing piece.
Above-mentioned scheme, when in actual use, can't carry out synchronous centre gripping to test piece all directions, will lead to the test piece atress inconsistent, seriously can lead to the test piece to produce the displacement, influences the centering centre gripping of drawing the post in top gripping head and the test piece, leads to experimental error.
Disclosure of Invention
In order to solve one of the problems in the prior art, the invention provides a test device for the bonding performance of concrete and steel structures, and the test device can synchronously clamp test pieces with different sizes in different directions, so that the stress of the test pieces in all directions is uniform, and the test accuracy is improved.
The technical scheme adopted for solving the technical problems is as follows:
The technical scheme provides a test device of concrete and steel construction adhesive property, includes: the testing machine comprises a testing machine body, a rotating mechanism and a rotating mechanism, wherein the testing machine body is provided with a clamping platform, and a gear ring turntable is formed on the outer edge of the clamping platform; a drawing assembly for drawing the steel structure; the clamping assemblies comprise a sliding cylinder, clamping jaws are connected in the sliding cylinder in a sliding manner through elastic assemblies, and racks are arranged on the side surfaces of the clamping jaws; the transmission assemblies comprise transmission shafts and transmission gears which are matched with each other, and the transmission gears are matched with the racks; the driving assembly comprises a gear ring, a rotating assembly for driving the gear ring to rotate and a lifting assembly for driving the gear ring to lift, wherein the gear ring is sleeved on the gear ring turntable; when the lifting assembly drives the gear ring to ascend, the gear ring is meshed with the transmission gears of each group of transmission assemblies, and the gear ring is disengaged from the transmission gears after descending.
Preferably, the transmission gear comprises a first gear and a second gear, the first gear is sleeved at the upper end of the transmission shaft and meshed with the rack, the second gear is sleeved at the lower end of the transmission shaft and matched with the gear ring.
Preferably, the rotating assembly includes a long gear engaged with the gear ring, the long gear being connected to a drive motor.
Preferably, the lifting assembly comprises a rotary table groove formed below the rotary table of the gear ring, a gear ring protrusion is arranged below the gear ring, the gear ring protrusion is matched with the rotary table groove, the rotary table groove is provided with an inclined plane, and when the gear ring rotates, the gear ring protrusion slides along the inclined plane of the rotary table groove, so that the gear ring is driven to lift.
Preferably, the clamping jaw comprises a clamping jaw body, a clamping jaw body and a clamping plate, and further comprises a limiting assembly, wherein the limiting assembly comprises a protrusion fixedly arranged on the clamping jaw, and a rotating shaft is further rotationally connected to the middle part of the limiting plate and fixedly connected with the sliding cylinder; the upper end part of the limiting plate corresponds to the bulge, and the lower part of the limiting plate corresponds to the gear ring; in a normal state, the upper end of the limiting plate is in contact with the bulge, so that the clamping jaw is in a contracted state, when the gear ring ascends for a first stroke, the gear ring drives the limiting plate to rotate around the rotating shaft, the upper end of the limiting plate is separated from the bulge, and the clamping jaw stretches out outwards under the action of the elastic component.
Preferably, the elastic component is a compression spring.
Preferably, the drawing assembly comprises a plurality of guide posts and a plurality of hydraulic cylinders which are fixed on the clamping platform, wherein the top of each hydraulic cylinder is fixedly connected with a lifting platform, the lifting platform is in sliding connection with the guide posts, and the bottom of each lifting platform is provided with a clamping head.
Compared with the prior art, the invention has the beneficial effects that:
1. Through set up elastic component at the clamping jaw afterbody, make the clamping jaw of a plurality of directions stretch out respectively, then reach the test piece surface and carry out the pre-centre gripping, rethread drive assembly drives drive assembly, makes drive assembly drive the clamping jaw of each direction can be simultaneously even applys clamping force, has avoided the work piece centre gripping in-process, deflection that the atress unbalance leads to.
2. In order to cooperate the pre-clamping function, the gear ring can be lifted, the first stroke of lifting of the gear ring can release the clamping jaw through the limiting component to perform pre-clamping, then the gear ring is meshed with the transmission component after continuously lifting, and then the clamping jaw is driven to clamp, so that the situation that the clamping jaw is not in place is avoided, and the gear ring starts to drive the transmission component to perform clamping work.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a perspective view of the overall structure of the present invention;
FIG. 2 is a schematic front view of the overall structure of the present invention;
FIG. 3 is a cross-sectional view of section A-A of FIG. 2;
FIG. 4 is a schematic view of a portion of the clamping assembly of FIG. 1;
FIG. 5 is a schematic view of a portion of the clamping assembly of FIG. 1 (working condition one);
FIG. 6 is a schematic view of a portion of the clamping assembly of FIG. 1 (second operating state);
Fig. 7 is a schematic structural view of the test piece of fig. 1.
Reference numerals illustrate:
1. a guide post; 2. a lifting platform; 3. a clamping head; 4. a hydraulic cylinder; 5. drawing a column; 6. a test piece; 7. a clamping assembly; 8. a transmission assembly; 9. an operation table; 10. a testing machine main body; 11. a clamping platform; 12. a gear ring; 13. a long gear; 14. a motor;
61. Concrete; 71. a clamping jaw; 72. a rack; 73. a sliding cylinder; 74. a protrusion; 75. a limiting plate; 76. a rotating shaft; 77. a lifting shaft; 78. an elastic component;
81. a first gear; 82. a transmission shaft; 83. a second gear; 84. a first chamfer;
111. a turntable groove; 121. the gear ring is convex; 122. and (5) a second chamfer.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it will be understood that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Furthermore, the terms "long," "short," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, for convenience of description of the present invention, and are not intended to indicate or imply that the apparatus or elements referred to must have this particular orientation, operate in a particular orientation configuration, and thus should not be construed as limiting the invention.
As shown in fig. 1 to 6, the present embodiment provides a test apparatus for bonding performance between concrete and steel structure, which comprises a main body 10 of a test machine, wherein a measuring instrument for test is mounted on the main body 10 of the test machine; an operation table 9 is arranged on one side of the testing machine main body 10; the testing machine main body 10 is provided with a hydraulic power device which is used for driving the hydraulic cylinder 4 to drive the lifting platform 2 to lift; for testing the test piece 6 manufactured, the inside of the test piece 6 is filled with concrete 61, and a drawing column 5 which is convenient for testing is arranged in the concrete 61.
Be provided with a plurality of groups of clamping components 7 on the testing machine main part 10, this clamping components 7 includes slide cylinder 73, is provided with elastic component 78 between slide cylinder 73 and the clamping jaw 71, for example elastic component 78 can adopt the pressure spring, and elastic component 78 can promote clamping jaw 71 to stretch out to realize that the independent of every group clamping jaw 71 stretches out, make the clamping jaw 71 of each direction can conflict to test piece 6 surface, realize the centre gripping in advance.
The limiting assembly comprises a protrusion 74 arranged on the clamping jaw 71, and further comprises a V-shaped limiting plate 75, a rotating shaft 76 is arranged in the middle of the limiting plate 75, and the rotating shaft 76 is arranged on the sliding cylinder 73; the upper end part of the limiting plate 75 corresponds to the bulge 74, and the lower part of the limiting plate 75 is provided with a lifting shaft 77 and corresponds to the gear ring 12; in a normal state, the upper end of the limiting plate 75 is in contact with the protrusion 74, so that the clamping jaw 71 is in a contracted state. And rack 72 is fixed with to the clamping jaw 71 side, and rack 72 meshes with drive assembly 8, and drive assembly 8 includes first gear 81, second gear 83 and transmission shaft 82, and transmission shaft 82 rotates to be connected on clamping platform 11, and first gear 81 cover is established in transmission shaft 82 upper end, and first gear 81 meshes with rack 72, and second gear 83 cover is established in the lower part of transmission shaft 82, and cooperatees with ring gear 12.
The rotating assembly comprises a long gear 13 meshed with the gear ring 12, the long gear 13 is connected with a motor 14 for driving, and the motor 14 drives the long gear 13 to rotate so as to drive the gear ring 12 to rotate.
The lifting assembly comprises a rotary table groove 111 arranged below the rotary table of the gear ring, a gear ring protrusion 121 is arranged below the gear ring 12, the gear ring protrusion 121 is matched with the rotary table groove 111, the rotary table groove 111 is provided with an inclined surface, and when the gear ring 12 rotates, the gear ring protrusion 121 slides along the inclined surface of the rotary table groove 111, so that the gear ring 12 is driven to lift. When the gear ring 12 ascends for the first stroke, the gear ring 12 drives the limiting plate 75 to rotate around the rotating shaft 76 through the lifting shaft 77, and of course, the lifting shaft 77 can also be manually shifted to separate the upper end part of the limiting plate 75 from the protrusion 74, and the clamping jaw 71 extends outwards under the action of the elastic component 78; the gear ring 12 continues to rise and starts to mesh with the second gear 83, so that the second gear 83 drives the transmission shaft 82 and the first gear 81 to rotate, and further drives the clamping jaw 71 to clamp the test piece 6. The time taken for the gear ring 12 to ascend the first stroke is longer than the time for the clamping jaw 71 to extend, so that after the first stroke of the gear ring 12 is completed, the clamping jaw 71 can be ensured to be pre-clamped.
The lower end face of the second gear 83 is provided with a first chamfer 84, the upper end face of the gear ring 12 is also provided with a second chamfer 122, and the first chamfer 84 and the second chamfer 122 are matched, so that tooth striking can be avoided when the gear ring 12 ascends to be meshed with the second gear 83.
The clamping platform 11 is fixed with a plurality of guide posts 1, and the lifting platform 2 is connected to the guide posts 1 in a sliding manner. A plurality of hydraulic cylinders 4 are also fixed on the clamping platform 11, and the tops of the hydraulic cylinders 4 are fixedly connected with the lifting platform 2, so that the lifting platform 2 can be driven to slide up and down along the guide column 1.
After the hydraulic cylinder 4 drives the lifting platform 2 to descend to a certain position, the clamping head 3 is controlled to clamp the drawing column 5 at first, and then after the clamping component 7 clamps the test piece 6, the hydraulic cylinder 4 jacks up the lifting platform 2 upwards to carry out a drawing test.
Working principle:
S1: when the test piece 6 provided with the drawing column 5 is placed on the upper part of the clamping platform 11, then the axis of the drawing column 5 is aligned with the center of the clamping head 3, the test piece is operated on the operating platform 9, the hydraulic cylinder 4 is started, the hydraulic cylinder 4 drives the lifting platform 2 to descend, and after the clamping head 3 contacts with the drawing column 5, the clamping head 3 is controlled to clamp the drawing column 5;
S2: after the clamping head 3 clamps the drawing column 5, the operation is performed on the operation table 9, the motor 14 is started, the motor 14 drives the long gear 13 to rotate, the long gear 13 drives the gear ring 12 to rotate, and along with the rotation of the gear ring 12, the gear ring protrusion 121 gradually slides out of the rotary table groove 111, and the gear ring 12 rises while rotating;
s3: the gear ring 12 rises to a first stroke, the lifting shaft 77 is lifted upwards, the lifting shaft 77 drives the limiting plate 75 to rotate around the rotating shaft 76, after the limiting plate 75 rotates, the protrusion 74 is not blocked by the limiting plate 75 any more, the elastic component 78 pushes the clamping jaw 71 to extend out of the sliding cylinder 73, and the clamping jaw 71 contacts with the surface of the test piece 6 to finish pre-clamping;
S4: the gear ring 12 continues to ascend, the gear ring 12 is meshed with the second gear 83, the gear ring 12 drives the second gear 83 to rotate, the second gear 83 drives the first gear 81 to rotate, the first gear 81 is meshed with the driving rack 72, the clamping jaw 71 starts to apply clamping force to the test piece 6, and after the pressure sensor arranged in the clamping jaw 71 reaches a set value, the motor 14 is locked; the hydraulic cylinder 4 starts to drive the lifting platform 2 to ascend, and a drawing test is performed.
In S1, the outer ring of the test piece 6 is of a steel structure, concrete 61 is filled in the outer ring, a drawing column 5 is embedded in the concrete 61, the bottom of the drawing column 5 is of a flat plate structure, the combination degree between the drawing column 5 and the concrete 61 can be increased, and the drawing column 5 and the concrete 61 are prevented from being separated during a drawing test.
In S2, a turntable groove 111 is formed below the turntable of the gear ring, the turntable groove 111 has an inclined plane, a gear ring protrusion 121 is formed below the gear ring 12, the gear ring protrusion 121 is matched with the turntable groove 111, and when the gear ring 12 is driven to rotate by the long gear 13, the gear ring protrusion 121 slides along the inclined plane of the turntable groove 111, so as to drive the gear ring 12 to lift.
In S3, the first procedure is: the ring gear 12 is lifted until it comes into contact with the second gear 83.
In S3-S4, the time required for each of the different direction jaws 71 to release to contact each side of the test piece 6 is different depending on the size of the test piece 6, and is at most 2 seconds. The first travel time is 3 seconds, so that it is ensured that the test pieces 6 of different sizes can be brought into engagement with the second gear 83 only after the clamping jaws 71 are in place.
According to the above use procedure, the test piece is first placed on the clamping platform 11 and the drawing column 5 is aligned with the clamping head 3. During the clamping process, the clamping jaws 71 in each direction are released to contact the side of the test piece 6, and the ring gear 12 is then brought into engagement with the second gear 83. That is, at the beginning of clamping, the clamping jaws 71 are in contact with the corresponding surfaces of the test piece 6, and each clamping jaw 71 simultaneously applies a clamping force to the test piece 6 during clamping. The clamping process of the individual clamping jaws 71 therefore does not displace the test piece 6, so that it is ensured that the drawing column 5 of the test piece 6 is always aligned with the clamping head 3.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (7)
1. The utility model provides a test device of concrete and steel construction bonding performance which characterized in that includes: the testing machine comprises a testing machine body (10), wherein the testing machine body (10) is provided with a clamping platform (11), and a gear ring turntable is formed on the outer edge of the clamping platform (11); a drawing assembly for drawing the steel structure; the clamping assemblies (7) comprise a sliding cylinder (73), clamping jaws (71) are connected in the sliding cylinder (73) in a sliding manner through elastic assemblies (78), and racks (72) are arranged on the side surfaces of the clamping jaws (71); a plurality of sets of drive assemblies (8), the drive assemblies (8) comprising cooperating drive shafts (82) and drive gears, the drive gears cooperating with the racks (72); the driving assembly comprises a gear ring (12), wherein the gear ring (12) is sleeved on the gear ring turntable, and the driving assembly further comprises a rotating assembly for driving the gear ring (12) to rotate and a lifting assembly for driving the gear ring (12) to lift; when the lifting assembly drives the gear ring (12) to ascend, the gear ring (12) is meshed with the transmission gears of each group of transmission assemblies (8), and the gear ring (12) is disengaged from the transmission gears after descending.
2. The test device for the adhesive property of concrete and steel structures according to claim 1, wherein: the transmission gear comprises a first gear (81) and a second gear (83), the first gear (81) is sleeved at the upper end of the transmission shaft (82), the first gear (81) is meshed with the rack (72), the second gear (83) is sleeved at the lower end of the transmission shaft (82), and the second gear (83) is matched with the gear ring (12).
3. The test device for the adhesive property of concrete and steel structures according to claim 1, wherein: the rotating assembly comprises a long gear (13) meshed with the gear ring (12), and the long gear (13) is connected with a driving motor.
4. The test device for the adhesive property of concrete and steel structures according to claim 1, wherein: the lifting assembly comprises a rotary table groove (111) formed below the rotary table of the gear ring, a gear ring protrusion (121) is arranged below the gear ring (12), the gear ring protrusion (121) is matched with the rotary table groove (111), the rotary table groove (111) is provided with an inclined surface, and when the gear ring (12) rotates, the gear ring protrusion (121) slides along the inclined surface of the rotary table groove (111), so that the gear ring (12) is driven to lift.
5. The test device for the adhesive property of concrete and steel structures according to claim 1, wherein: the clamping jaw comprises a clamping jaw body and is characterized by further comprising a limiting assembly, wherein the limiting assembly comprises a protrusion (74) fixedly arranged on the clamping jaw (71), and further comprises a limiting plate (75), a rotating shaft (76) is further rotationally connected to the middle part of the limiting plate (75), and the rotating shaft (76) is fixedly connected with the sliding cylinder (73); the upper end part of the limiting plate (75) corresponds to the bulge (74), and the lower part of the limiting plate (75) corresponds to the gear ring (12); in a normal state, the upper end of the limiting plate (75) is in contact with the protrusion (74), so that the clamping jaw (71) is in a contracted state, when the gear ring (12) ascends for a first stroke, the gear ring (12) drives the limiting plate (75) to rotate around the rotating shaft (76), the upper end of the limiting plate (75) is separated from the protrusion (74), and the clamping jaw (71) stretches out under the action of the elastic component (78).
6. The test device for the adhesive property of concrete and steel structures according to claim 1, wherein: the elastic component (78) is a compression spring.
7. The test device for the adhesive property of concrete and steel structures according to claim 1, wherein: the drawing assembly comprises a plurality of guide posts (1) and a plurality of hydraulic cylinders (4) which are fixed on the clamping platform (11), wherein the top of each hydraulic cylinder (4) is fixedly connected with a lifting platform (2), the lifting platforms (2) are in sliding connection with the guide posts (1), and clamping heads (3) are arranged at the bottoms of the lifting platforms (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410622787.9A CN118190794A (en) | 2024-05-20 | 2024-05-20 | Test device for bonding performance of concrete and steel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410622787.9A CN118190794A (en) | 2024-05-20 | 2024-05-20 | Test device for bonding performance of concrete and steel structure |
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| Publication Number | Publication Date |
|---|---|
| CN118190794A true CN118190794A (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410622787.9A Pending CN118190794A (en) | 2024-05-20 | 2024-05-20 | Test device for bonding performance of concrete and steel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118190794A (en) |
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