CN106680015B - Lateral supporting device for axial compression and shear test - Google Patents
Lateral supporting device for axial compression and shear test Download PDFInfo
- Publication number
- CN106680015B CN106680015B CN201710133825.4A CN201710133825A CN106680015B CN 106680015 B CN106680015 B CN 106680015B CN 201710133825 A CN201710133825 A CN 201710133825A CN 106680015 B CN106680015 B CN 106680015B
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- China
- Prior art keywords
- shaped steel
- permanent magnet
- magnetic support
- steel beam
- portal
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- 230000006835 compression Effects 0.000 title claims abstract description 10
- 238000007906 compression Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- 230000006698 induction Effects 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a lateral supporting device for an axial compression and shear test, which comprises a portal and C-shaped steel beams which are arranged at two sides of the portal and laterally support, wherein a test piece loading space is formed between the two C-shaped steel beams; the cavity inside card of C shaped steel roof beam is equipped with the magnetism support, is provided with permanent magnet in the magnetism support, and C shaped steel roof beam passes through permanent magnet to be adsorbed on the portal, promotes its installation ease, position wantonness on the basis of keeping side direction support function to reduce the labour cost, improve its installation effectiveness.
Description
Technical Field
The invention relates to a test device of a test piece under the effects of axial compression and shearing resistance, in particular to a lateral support device for the axial compression and shearing resistance test.
Background
With the rapid development of the building industry, the current demands of common building components cannot be met, and more students are devoted to developing novel components, such as very important bearing components in building structures of cold-formed thin-wall steel combined walls, self-resetting steel frames, combined floors and the like. A number of related tests are therefore required to reveal the failure modes and stress mechanisms of these components, wherein both the axial and shear tests involved must employ lateral support to secure the test piece, avoiding its decentration due to tilting during initial loading, and torsional tilting of the test piece during loading.
Traditional side direction supports fixed technology adopts a plurality of high-strength bolts and portal fixed connection, but the problem lies in: the installation position of the lateral support is high, the danger of the operation of researchers is high, and sometimes the researchers even need assistance of workers; in order to achieve the test purpose, a plurality of groups of test pieces are generally designed for exploration, which means that the lateral support of the fixed test piece is required to be installed and detached before and after each test starts, so that the time and the labor are consumed, and the working efficiency is greatly reduced; different tests have different requirements on the lateral support positions, and the defect of the bolt connection is that the lateral support cannot be fixed at any position, so that the mounting height of a test piece is required to be adjusted in the test process, other accessories are designed, and the traditional lateral support operation using the high-strength bolt connection is dangerous, labor-consuming and time-consuming, and has certain limitation. Therefore, the novel lateral support which is easy to install, disassemble and position is developed, and the novel lateral support has important significance for improving the axial force and the safety and the working efficiency in the shear test.
Disclosure of Invention
The invention aims to provide a lateral supporting device for shaft pressing and shearing tests, which improves the installation simplicity and the position randomness on the basis of maintaining the lateral supporting function, thereby reducing the labor cost and improving the installation efficiency.
In order to achieve the aim, the technical scheme adopted by the invention is that the lateral supporting device for the axial compression and shear test comprises a portal frame and C-shaped steel beams which are arranged at two sides of the portal frame and laterally support, wherein a test piece loading space is formed between the two C-shaped steel beams; a magnetic support is clamped in the cavity of the C-shaped steel beam, a permanent magnet is arranged in the magnetic support, and the C-shaped steel beam is adsorbed on the door frame through the permanent magnet.
The magnetic support comprises a magnetizer, a cylindrical cavity is formed in the middle of the magnetizer along the length direction of the C-shaped steel beam, a permanent magnet is arranged in the cylindrical cavity and rotates, one end of the permanent magnet is connected with a magnetic support switch for controlling the permanent magnet to rotate, soft magnetism for cutting OFF the magnetic induction line of the permanent magnet is further arranged in the magnetic support, when the magnetic support switch rotates to OFF, two poles of the permanent magnet are in contact with the soft magnetism, and when the magnetic support switch rotates to ON, two poles of the permanent magnet are in contact with the magnetizer.
One end of the magnetic support, which extends into the C-shaped steel beam, is provided with a clamping ring, and a bolt rod of the bolt longitudinally penetrates through the upper flange and the lower flange of the C-shaped steel beam and passes through the clamping ring to fix the magnetic support.
The two poles of the permanent magnet are arranged along the diameter direction of the cylindrical cavity.
The portal is also provided with a chain block, and the tail end of the chain block is connected to the C-shaped steel beam.
And lateral limiting elements for clamping the test piece between the two C-shaped steel beams are arranged on the two C-shaped steel beams.
The lateral limiting element comprises a nut fixed at the top of the C-shaped steel beam, a screw is arranged in the nut in the opening direction of the nut towards the loading space of the test piece, a base plate is fixed at the front end of the screw to form a screw base plate, the front end of the base plate is connected with a clamping shell, balls are arranged in the clamping shell, the front end of the clamping shell is provided with a hole, and the balls partially extend out of the clamping shell to be in contact with the loading test piece.
The magnetic support is tightly matched with the C-shaped steel beam.
Compared with the prior art, the invention has the advantages that the magnetic support is clamped in the cavity of the C-shaped steel beam, the permanent magnet is arranged in the magnetic support, the C-shaped steel beam is adsorbed on the portal through the permanent magnet, the C-shaped steel beam is fixed at any position on the portal, and compared with the prior bolt fixing, the invention does not need to design a lateral support height in advance, and only needs to be hoisted to a required position during a test, thereby reducing the preparation work before the test and saving the time; secondly, in the test installation and dismantlement process, need not to load and unload the bolt, can fix at any time and withdraw the side direction through rotating magnetism support switch and support, reduce the manpower and utilized, improved work efficiency and security greatly.
Furthermore, the magnetic support is tightly embedded in the C-shaped steel beam, so that the C-shaped steel beam and the C-shaped steel beam are tightly combined to form a whole, the whole can be stressed together under the action of external force, the middle part of the magnetic support is provided with a strip-shaped permanent magnet, and the strip-shaped soft magnet is further provided, and the permanent magnet is controlled by rotating the magnetic support switch, so that the separation and the attraction of the C-shaped steel beam serving as lateral support and the door frame are realized.
Further, the limiting accessory is fixed at the upper flange of the C-shaped steel beam, the balls at the front end of the limiting accessory can realize the hinged support of the test piece, the distance between the screw rod and the test piece is adjusted, the test piece is ensured to be perpendicular to the ground, and initial eccentricity is not generated, so that the limiting purpose is achieved.
Further, the chain block is used as a safety measure, is connected with two ends of the lateral support and is hung on the door frame, so that not only can the safety function be achieved, but also the position of the lateral support can be adjusted, and the safety device is convenient and quick.
Further, one end of the magnetic support extending into the C-shaped steel beam is provided with a clamping ring, a bolt rod of the bolt longitudinally penetrates through the upper flange and the lower flange of the C-shaped steel beam and penetrates through the clamping ring to fix the magnetic support, the bolt rod is further utilized to limit the movement of the magnetic support along the lateral support length direction, and the magnetic support and the C-shaped steel beam are ensured not to fall off under any condition.
Drawings
Fig. 1 is a front view of a lateral support device.
Fig. 2 is a side view of the lateral support device.
Fig. 3 is a cross-sectional view of the lateral supporting device A-A, fig. 3a is a schematic view of breaking the engagement between the C-shaped steel beam and the portal, and fig. 3b is a schematic view of the engagement between the C-shaped steel beam and the portal.
Fig. 4 is a schematic diagram of a magnetic support, fig. 4a is a schematic diagram of breaking the attraction between a C-shaped steel beam and a portal, and fig. 4b is a schematic diagram of the attraction between the C-shaped steel beam and the portal.
Fig. 5 is a schematic view of a lateral limiting fitting and a C-beam mounting structure.
Fig. 6 is an exploded view of the lateral stop fitting.
Fig. 7 is a left side view of fig. 6.
In the accompanying drawings: 1. portal, 2, C shaped steel roof beam, 3, side direction spacing accessory, 31, nut, 32, screw rod, 33, gasket, 34, ball, 35, clamping shell, 36, screw rod backing plate, 4, magnetism support, 41, permanent magnet, 42, soft magnetism, 43, magnetizer, 5, magnetism support switch, 6, snap ring, 7, bolt, 8, bolt, 9, the chain block.
Detailed Description
The invention is further described below with reference to the embodiments shown in the drawings in which:
as shown in fig. 1, a lateral supporting device for axial compression and shear test comprises a portal 1 and C-shaped steel beams 2 which are arranged at two sides of the portal 1 and used for lateral supporting, wherein the portal 1 is prepared by a magnetizer, a chain block 9 is arranged on the portal 1, and the tail end of the chain block 9 is connected to the C-shaped steel beams 2; a test piece loading space is formed between the two C-shaped steel beams 2, as shown in fig. 2, a magnetic support 4 is clamped in a cavity of the C-shaped steel beam 2, as shown in fig. 4, a permanent magnet 41 is arranged in the magnetic support 4, two poles of the permanent magnet 41 are arranged along the diameter direction of the cylindrical cavity, the C-shaped steel beam 2 is adsorbed on the door frame 1 through the permanent magnet 41, the magnetic support 4 comprises a magnetizer 43, the middle part of the magnetizer 43 is provided with the cylindrical cavity along the length direction of the C-shaped steel beam 2, and the permanent magnet 41 is arranged in the cylindrical cavity and rotates.
As shown in fig. 3 and 4, one end of the permanent magnet 41 is connected with a magnetic support switch 5 for controlling the permanent magnet 41 to rotate, and a soft magnet 42 for cutting off the magnetic induction line of the permanent magnet 41 is also arranged in the magnetic support 4; as shown in fig. 3a and 4a, when the magnetic stand switch 5 is turned to OFF, both poles of the permanent magnet 41 are in contact with the soft magnet 42, i.e., the soft magnet 42 cuts OFF the magnetic force lines of the permanent magnet 41 and the bracket of the gantry 1; as shown in fig. 3b and 4b, when the magnetic stand switch 5 is turned ON, both poles of the permanent magnet 41 are in contact with the magnetizer 43, and at this time, the magnetizer 43 is also magnetized by the magnetic force, and under this principle, the side stay can be fixed at an arbitrary height.
As shown in fig. 1 and 3, a clamping ring 6 is arranged at one end of the magnetic support 4 extending into the C-shaped steel beam 2, and a bolt rod 8 of a bolt 7 longitudinally penetrates through the upper flange and the lower flange of the C-shaped steel beam 2 and penetrates through the clamping ring 6 to fix the magnetic support 4.
As shown in fig. 1 and 2, the two C-shaped steel beams 2 are provided with lateral limiting elements 3 for clamping a loading test piece between the two C-shaped steel beams 2; as shown in fig. 5, the lateral limiting element 3 comprises a nut fixed on the top of the C-shaped steel beam 2, the opening direction of the nut faces the test piece loading space, a screw is arranged in the nut, a base plate is fixed at the front end of the screw to form a screw base plate 36, a clamping shell 35 is connected at the front end of the base plate, a ball 34 is arranged in the clamping shell 35, a hole is formed at the front end of the clamping shell 35, and part of the ball 34 extends out of the clamping shell 35 to contact with the loaded test piece; as shown in fig. 6 and 7, the clamping shell 35 is connected with the backing plate through bolts, and comprises a nut 31, a screw rod 32 and a gasket 33.
In the use process, the magnetic support switch 5 is adjusted to be OFF so that the permanent magnet is in soft magnetic contact, at the moment, the magnetic support 4 has no magnetic force, the C-shaped steel beam 2 is hung to the test height, is buckled at the flange of the portal 1, is calibrated through a level bar, and is accurately positioned, and then the magnetic support switch 5 is adjusted to be ON, so that the C-shaped steel beam 2 is attracted at the appointed position of the portal 1.
As shown in fig. 1, if the height of the two ends of the upper side of the C-shaped steel beam 2 needs to be adjusted, the magnetic support switch 5 is only required to be turned off, the height of the side support is adjusted by the chain 9, the suction process is repeated, and finally the distance between the side support and the member is adjusted by the limiting fitting 3, so that the test piece is ensured to be vertical to the ground, and the condition of just contacting with the test piece is achieved.
Claims (3)
1. The lateral supporting device for the axial compression and shear test is characterized by comprising a portal (1) and C-shaped steel beams (2) which are arranged at two sides of the portal (1) and used for laterally supporting, wherein a test piece loading space is formed between the two C-shaped steel beams (2); a magnetic support (4) is clamped in the cavity of the C-shaped steel beam (2), a permanent magnet (41) is arranged in the magnetic support (4), and the C-shaped steel beam (2) is adsorbed on the door frame (1) through the permanent magnet (41);
the two C-shaped steel beams (2) are respectively provided with a lateral limiting element (3) for clamping a loading test piece between the two C-shaped steel beams (2); the lateral limiting element (3) comprises a screw cap fixed at the top of the C-shaped steel beam (2), the opening direction of the screw cap faces the loading space of the test piece, a screw is arranged in the screw cap, a base plate forming a screw base plate (36) is fixed at the front end of the screw, a clamping shell (35) is connected at the front end of the base plate, a ball (34) is arranged in the clamping shell (35), a hole is formed at the front end of the clamping shell (35), and part of the ball (34) extends out of the clamping shell (35) to be in contact with the loading test piece; the portal frame (1) is also provided with a chain block (9), and the tail end of the chain block (9) is connected to the C-shaped steel beam (2);
one end of the magnetic support (4) extending into the C-shaped steel beam (2) is provided with a clamping ring (6), a bolt rod (8) of a bolt (7) longitudinally penetrates through the upper flange and the lower flange of the C-shaped steel beam (2) and penetrates through the clamping ring (6) to fix the magnetic support (4), and two poles of the permanent magnet (41) are arranged along the diameter direction of the cylindrical cavity.
2. The lateral supporting device for axial compression and shear test according to claim 1, wherein the magnetic support (4) comprises a magnetizer (43), a cylindrical cavity is formed in the middle of the magnetizer (43) along the length direction of the C-shaped steel beam (2), the permanent magnet (41) is arranged in the cylindrical cavity and rotates, one end of the permanent magnet (41) is connected with a magnetic support switch (5) for controlling the permanent magnet to rotate, a soft magnet (42) for cutting OFF the magnetic induction line of the permanent magnet (41) is further arranged in the magnetic support (4), when the magnetic support switch (5) rotates to be turned OFF, two poles of the permanent magnet (41) are contacted with the soft magnet (42), and when the magnetic support switch (5) rotates to be turned ON, two poles of the permanent magnet (41) are contacted with the magnetizer (43).
3. A lateral support device for axial compression and shear tests according to claim 1, characterized in that the magnetic support (4) is a close fit with the C-beam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710133825.4A CN106680015B (en) | 2017-03-08 | 2017-03-08 | Lateral supporting device for axial compression and shear test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710133825.4A CN106680015B (en) | 2017-03-08 | 2017-03-08 | Lateral supporting device for axial compression and shear test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106680015A CN106680015A (en) | 2017-05-17 |
| CN106680015B true CN106680015B (en) | 2024-01-02 |
Family
ID=58826437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710133825.4A Active CN106680015B (en) | 2017-03-08 | 2017-03-08 | Lateral supporting device for axial compression and shear test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106680015B (en) |
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2017
- 2017-03-08 CN CN201710133825.4A patent/CN106680015B/en active Active
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| Publication number | Publication date |
|---|---|
| CN106680015A (en) | 2017-05-17 |
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