Stand column testing tool

Abstract

The utility model discloses a stand column testing tool which is suitable for horizontal force testing of a C-shaped steel stand column, the stand column testing tool comprises a hoop and a connecting plate, the hoop and the connecting plate are matched and arranged on the periphery of the stand column in a surrounding mode, and the hoop comprises a main body part and extending parts arranged on the two sides of the main body part. The connecting plate comprises a main plate part and a protruding part arranged on one side of the main plate part, the stand column is provided with an opening, the protruding part abuts against the side, away from the opening, of the stand column, the main body part abuts against the other three sides of the stand column, and the extending part abuts against the main plate part and is fixedly connected with the main plate part. According to the stand column testing tool, a force application point of a horizontal test can act on the shear center position or is located on the same plane with the shear center position, and therefore local buckling deformation of the stand column is reduced.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic support technology, and in particular to a column testing fixture. Background Technology

[0002] Pull-out tests on columns are a common testing method in building or structural engineering. They are mainly used to assess the connection strength between columns and foundations. This test can help ensure that the structure has sufficient safety and stability in practical applications, especially under harsh conditions such as earthquakes or strong winds.

[0003] For C-shaped steel columns, due to their asymmetry, the shear center and centroid do not coincide. The centroid is located at a location with a larger concentration of material, while the shear center (i.e., the bending center of the C-shaped steel) is located outside the cross-section. Existing field fixtures for pull-out testing typically consist of a steel plate welded around the column. When performing directional horizontal force tests, the force application point is usually aligned with the centroid. However, the centroid is the location where pressure or tension acts when the cross-section is uniformly stressed. The fixture and column are prone to plastic torsion due to uneven stress. Once plastic torsion or significant deformation occurs, the horizontal force test must be terminated, a new test pile used, and the pull-out test repeated.

[0004] Therefore, it is necessary to provide a new column testing fixture to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a column testing fixture that can make the force application point and the shear core of the column on the same plane, thereby reducing the local buckling deformation of the column.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A column testing fixture is suitable for testing the horizontal force of a C-shaped steel column. The column has an opening, and the column testing fixture includes a clamp and a connecting plate. The clamp and the connecting plate are fitted around the outer periphery of the column. The clamp includes a main body and extensions on both sides of the main body. The connecting plate includes a main plate and a protrusion on one side of the main plate. The protrusion is used to abut against the side of the column away from the opening. The main body abuts against the other three sides of the column, and the extension abuts against the main plate and is fixedly connected to the main plate.

[0008] As a further improvement of the present invention, the main body at least partially abuts against the protrusion, the protrusion including a first plate wall and a second plate wall, the two first plate walls being perpendicular to the main body, the second plate wall connecting the two first plate walls at the ends away from the main body, the first plate wall abutting against the main body, and the second plate wall abutting against the side of the column away from the opening.

[0009] As a further improvement of the present invention, the protrusion further includes a third plate wall, which connects the main plate portion and the second plate wall. The third plate wall is located between the two first plate walls and is parallel to the first plate walls.

[0010] As a further improvement of this utility model, the number of the third plate wall is one, the third plate wall connects the center of the second plate wall to the main plate part, and the distance between the third plate wall and the two first plate walls is equal.

[0011] As a further improvement of the present invention, the main body includes a first substrate and two second substrates disposed at both ends of the first substrate. The two second substrates extend vertically and in the same direction from both ends of the first substrate. The first substrate and the second substrate wall respectively abut against one side of the opening of the column and the side away from the opening. The two second substrates abut against the other two sides of the column respectively. The two extension portions extend away from each other from the ends of the two second substrates away from the first substrate.

[0012] As a further improvement of the present invention, the protrusion is located between the main board and the column, and the protrusion is located between the two second substrates.

[0013] As a further improvement of the present invention, the clamp also includes a reinforcing part, which connects the second base plate and the extension part. The reinforcing part, the second base plate and the extension part cooperate to form a triangular structure.

[0014] As a further improvement of the present invention, the reinforcing part includes two reinforcing plates, the plane of which is perpendicular to the second substrate and the extension.

[0015] As a further improvement of the present invention, the main board is provided with a through hole, which is located on the part of the main board other than the clamp, and is used to connect with the force application mechanism.

[0016] As a further improvement of the present invention, the connecting plate further includes a convex shaft, which is located on the side of the main plate away from the protrusion and is located on the center line of the protrusion, for docking with the force application mechanism.

[0017] Compared to existing technologies, the advantages of this utility model's column testing fixture are as follows: By adding this column testing fixture, on the one hand, the clamp and connecting plate cooperate to surround the column, the force-applying mechanism connects with the main body of the connecting plate, and the connecting plate has a protruding part that abuts against the column, so that the main body is relatively far away from the column to the shear core position of the column. This allows the force point of the horizontal test to be applied to the shear core position or to be on the same plane as the shear core position, thereby reducing the local buckling deformation of the column. On the other hand, the clamp and connecting plate cooperate to restrict the relative displacement of the column and improve the strength of the column at the stress position. This column testing fixture has a simple structure, high strength, and is easy to manufacture on the construction site. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the application of the column testing fixture according to a specific embodiment of the present invention;

[0019] Figure 2 for Figure 1 A top-view structural diagram;

[0020] Figure 3 This is a three-dimensional structural diagram of a column testing fixture according to a specific embodiment of the present invention;

[0021] Figure 4 This is an exploded structural diagram of the column testing fixture according to a specific embodiment of the present invention. Detailed Implementation

[0022] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. If several embodiments exist, features in these embodiments may be combined with each other without conflict. When the description refers to the drawings, unless otherwise stated, the same numbers in different drawings represent the same or similar elements. The descriptions in the following exemplary embodiments do not represent all embodiments consistent with the present invention; rather, they are merely examples of apparatuses, products, and / or methods consistent with some aspects of the present invention as set forth in the claims.

[0023] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of protection of this invention. The singular forms “a,” “the,” or “the” used in the specification and claims of this invention are also intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should be understood that the terms "first," "second," and similar words used in the specification and claims of this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish the features. Similarly, the terms "an" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one. Unless otherwise stated, the terms "front," "back," "left," "right," "upper," "lower," and similar words appearing in this utility model are for ease of explanation only and are not limited to a specific location or spatial orientation. The terms "comprising" or "including" are an open-ended expression, meaning that the element preceding "comprising" or "including" covers the element following "comprising" or "including" and its equivalents, which does not exclude that the element preceding "comprising" or "including" may also include other elements. If "several" appears in this utility model, it means two or more.

[0025] Please see Figures 1 to 4 As shown, this embodiment discloses a column testing fixture suitable for horizontal force testing of C-shaped steel columns. The testing equipment for horizontal force testing of columns includes a chain crane, a displacement sensor, a force sensor or a pressure gauge, etc. The chain crane is used to provide horizontal testing force to the column, the displacement sensor is used to monitor the deformation of the column during the pull-out process, and the force sensor or pressure gauge is used to record the applied pull-out force.

[0026] The column testing fixture includes a clamp 1 and a connecting plate 2. The clamp 1 and the connecting plate 2 are fitted together around the outer periphery of the column 100, and the clamp 1 and the connecting plate 2 are locked and fixed to the column 100 to improve the strength of the column 100 at the stress position.

[0027] The clamp 1 includes a main body 11 and extensions 12 disposed on both sides of the main body 11. In this embodiment, the column 100 is in the form of C-shaped steel. The column 100 has an opening 101. The main body 11 abuts against one side of the opening 101 of the column 100 and the two sides adjacent to the opening 101. The extensions 12 are fixedly connected to the connecting plate 2.

[0028] The connecting plate 2 includes a main plate 21 and a protrusion 22 disposed on one side of the main plate 21. The protrusion 22 abuts against the side of the column 100 away from the opening 101. The main body 11 of the clamp 1 at least partially abuts against the protrusion 22. The extension 12 of the clamp 1 abuts against the main plate 21 and is fixedly connected to the main plate 21. The main plate 21 is connected to the force application mechanism, i.e., the chain crane.

[0029] With this configuration, the protrusion 22 is located between the column 100 and the main board 21. That is, the protrusion 22 moves the main board 21 relatively away from the column 100, increases the distance between the main board 21 and the column 100, and places the main board 21 at the shear center position of the column 200. This makes the column testing fixture and the column 100 subject to uniform force, reducing the plastic torsion and local buckling deformation of the column 100.

[0030] The protrusion 22 includes a first plate wall 221 and a second plate wall 222. The two first plate walls 221 are vertically connected to the main plate portion 21, and the second plate wall 222 connects to the ends of the two first plate walls 221 away from the main plate portion 21. Further, the length of the second plate wall 222 is greater than the length of the first plate wall 221. The two first plate walls 221, the second plate wall 222, and the main plate portion 21 together form a cuboid. The sides of the two first plate walls 221 that are away from each other abut against the main body portion 11, and the side of the second plate wall 222 that is away from the main plate portion 21 abuts against the side of the column 100 away from the opening 101. This cuboid strengthens the support of the testing fixture on the column 100, preventing deformation of both the testing fixture and the column 100, while also increasing the strength of the testing fixture to avoid damage to both the column 100 and the testing fixture. Furthermore, the protrusion 22 also includes a third plate wall 223, which connects the main plate portion 21 and the second plate wall 222. The third plate wall 223 is located between the two first plate walls 221 and is arranged parallel to the first plate walls 221. The arrangement of the third plate wall 223 strengthens the structural strength of the protrusion 22, making it less prone to deformation when subjected to compression by the test fixture when it is clamped and fixed to the column 100.

[0031] In this embodiment, there is one third plate wall 223. The third plate wall 223 connects the center of the second plate wall 222 to the main plate part 21, and the distance between the third plate wall 223 and the two first plate walls 221 is equal. That is to say, the third plate wall 223 divides the cuboid formed by the two first plate walls 221, the second plate wall 222 and the main plate part 21 into two equal cuboids. This arrangement makes the protrusion 22 symmetrical and the force uniform, and also makes the test fixture and the column 100 uniformly stressed.

[0032] In other embodiments, the number of third plate walls 223 may be two or more, and the multiple third plate walls 223 are evenly distributed between the two first plate walls 221, dividing the cuboid formed by the two first plate walls 221, the second plate wall 222 and the main plate part 21 into multiple cuboids.

[0033] The main board section 21 and the protrusion section 22 are integrated into one piece, which has high structural strength.

[0034] The main body 11 includes a first substrate 111 and two second substrates 112 disposed at both ends of the first substrate 111. The two second substrates 112 extend vertically and in the same direction from both ends of the first substrate 111. The first substrate 111 and the second substrate wall 222 respectively abut against the opening side and the side away from the opening 101 of the column 100. The two second substrates 112 respectively abut against the other two sides of the column 100, and the two second substrates 112 also at least partially abut against the two first substrate walls 221 of the protrusion 22. The protrusion 22 is located between the main body 21 and the column 100, and the protrusion 22 is located between the two second substrates 112. The first substrate 111 is parallel to the second plate wall 222, and the second substrate 112 is parallel to the first plate wall 221. At least a portion of the second substrate 112 near the first substrate 111 is in contact with the column 100, and at least a portion of the second substrate 112 away from the first substrate 111 is in contact with the first plate wall 221. The distance between the two first plate walls 221 on the side away from each other is equal to the distance between the two second substrates 112 on the side close to each other.

[0035] With this configuration, the cuboid protrusion 22 is tightly surrounded on all sides. One side of it shares one side with the main board 21. The second plate wall 222 on the side away from the main board 21 is in close contact with the column 100. The first plate walls 221 on the other two opposite sides are in close contact with the two second substrates 112. Therefore, the protrusion 22 can effectively improve the structural strength and limit the main board 21 to the shear position of the column 100.

[0036] Two extensions 12 extend away from the ends of the two second substrates 112 away from the first substrate 111, respectively. The two extensions 12 are located on both sides of the protrusion 22, parallel and closely abutting against the main board 21. The extensions 12 and the main board 21 are locked and fixedly connected by fasteners 3. This configuration simplifies the connection structure and facilitates multiple tests and installation and fixation of the column test fixture.

[0037] Furthermore, the clamp 1 also includes a reinforcing portion 13, which connects the second base plate 112 and the extension portion 12. The reinforcing portion 13 linearly connects the side of the second base plate 112 away from the column 100 and the side of the extension portion 12 away from the main plate portion 21. The reinforcing portion 13, the second base plate 112, and the extension portion 12 cooperate to form a triangular structure. In this way, the arrangement of the reinforcing portion 13 allows the clamp 1 to withstand both tension and compression, enabling it to transfer loads and prevent structural deformation.

[0038] Specifically, the reinforcing part 13 includes two reinforcing plates 131, which are symmetrically arranged, and the plane of the reinforcing plates 131 is perpendicular to the second substrate 112 and the extension part 12, so as to achieve a greater reinforcing effect.

[0039] In this embodiment, the main board portion 21 is provided with a through hole 211. The through hole 211 is located on the part of the main board portion 21 other than the clamp 1, that is, at one end of the main board portion 21, for docking with the force application mechanism, that is, connecting with the chain of the chain crane, so that the chain crane can apply tension or pressure to the column 100 through the column testing fixture. At this time, the point of application of the horizontal force is located at the through hole 211, which is on the same plane as the shear center position of the column 100.

[0040] In other embodiments, the connecting plate 2 further includes a convex shaft (not shown in the figure), which is fixedly disposed on the side of the main plate 21 away from the protrusion 22 and located on the center line of the protrusion 22. The convex shaft is used to connect with the force-applying mechanism. The chain of the chain crane can be fixed to the convex shaft, allowing the chain crane to apply a load to the column 100 via the column testing fixture. In this case, the point of application of the horizontal force is located at the connection between the convex shaft and the main plate 21, i.e., the point of application is located at the shear center of the column 100.

[0041] In this embodiment, both the clamp 1 and the connecting plate 2 are made of steel, and all their right-angle structures are formed by bending, resulting in high rigidity and strength, and simple manufacturing. The fasteners 3 are all bolt and nut assemblies, which are easy to assemble and disassemble.

[0042] In summary, compared with existing technologies, the column testing fixture of this utility model has the following advantages: The beneficial effects of the column testing fixture are as follows: By adding this column testing fixture, on the one hand, the clamp 1 and the connecting plate 2 cooperate to surround the column 100, the force application mechanism is connected to the main plate 21 of the connecting plate 2, and the connecting plate 2 is provided with a protrusion 22 that abuts against the column 100, so that the main plate 21 is relatively far away from the column 100 to the shear center position of the column 100, which can apply the force point of the horizontal test to the shear center position or be on the same plane as the shear center position, thereby reducing the local buckling deformation of the column 100. On the other hand, the clamp 1 and the connecting plate 2 cooperate to restrict the relative displacement of the column 100 and improve the strength of the force-bearing position of the column 100. This column testing fixture has a simple structure, high strength, and is easy to manufacture on the construction site.

[0043] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. A column testing fixture suitable for performing horizontal force testing on a C-shaped steel column (100), wherein the column (100) has an opening (101), characterized in that: The column testing fixture includes a clamp (1) and a connecting plate (2). The clamp (1) and the connecting plate (2) are fitted together to surround the outer periphery of the column (100). The clamp (1) includes a main body (11) and extensions (12) on both sides of the main body (11). The connecting plate (2) includes a main body (21) and a protrusion (22) on one side of the main body (21). The protrusion (22) is used to abut against the side of the column (100) away from the opening (101). The main body (11) is used to abut against the other three sides of the column (100). The extension (12) abuts against the main body (21) and is fixedly connected to the main body (21).

2. The column testing fixture according to claim 1, characterized in that: The main body (11) at least partially abuts against the protrusion (22), the protrusion (22) including a first plate wall (221) and a second plate wall (222), the two first plate walls (221) being perpendicular to the main body (21), the second plate wall (222) connecting the two first plate walls (221) away from the main body (21), the first plate wall (221) abutting against the main body (11), and the second plate wall (222) abutting against the side of the column (100) away from the opening (101).

3. The column testing fixture according to claim 2, characterized in that: The protrusion (22) further includes a third plate wall (223), which connects the main plate portion (21) and the second plate wall (222). The third plate wall (223) is located between the two first plate walls (221) and is parallel to the first plate walls (221).

4. The column testing fixture according to claim 3, characterized in that: The number of the third plate wall (223) is one. The third plate wall (223) connects the center of the second plate wall (222) to the main plate part (21). The distance between the third plate wall (223) and the two first plate walls (221) is equal.

5. The column testing fixture according to claim 2, characterized in that: The main body (11) includes a first substrate (111) and two second substrates (112) disposed at both ends of the first substrate (111). The two second substrates (112) extend vertically in the same direction from both ends of the first substrate (111). The first substrate (111) and the second plate wall (222) respectively abut against one side of the opening (101) of the column (100) and the side away from the opening (101). The two second substrates (112) respectively abut against the other two sides of the column (100). The two extensions (12) extend away from each other from one end of the two second substrates (112) away from the first substrate (111).

6. The column testing fixture according to claim 5, characterized in that: The protrusion (22) is located between the main board (21) and the pillar (100), and the protrusion (22) is located between the two second substrates (112).

7. The column testing fixture according to claim 5, characterized in that: The clamp (1) also includes a reinforcing part (13), which connects the second base plate (112) and the extension part (12). The reinforcing part (13), the second base plate (112) and the extension part (12) cooperate to form a triangular structure.

8. The column testing fixture according to claim 7, characterized in that: The reinforcing part (13) includes two reinforcing plates (131), the plane of which the reinforcing plates (131) are perpendicular to the second substrate (112) and the extension part (12).

9. The column testing fixture according to claim 1, characterized in that: The main board (21) is provided with a through hole (211), which is located on the part of the main board (21) other than the clamp (1) and is used to connect with the force application mechanism.

10. The column testing fixture according to claim 1, characterized in that: The connecting plate (2) also includes a convex shaft, which is located on the side of the main plate (21) away from the protrusion (22) and is located on the center line of the protrusion (22) for docking with the force application mechanism.

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