CN216475895U - Shear key device for steel pipe concrete column base - Google Patents
Shear key device for steel pipe concrete column base Download PDFInfo
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- CN216475895U CN216475895U CN202122496065.8U CN202122496065U CN216475895U CN 216475895 U CN216475895 U CN 216475895U CN 202122496065 U CN202122496065 U CN 202122496065U CN 216475895 U CN216475895 U CN 216475895U
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Abstract
The utility model discloses a shear key device for a steel pipe concrete column foot, which comprises a bottom plate fixed at the bottom of a steel pipe concrete column, wherein a steel pipe shear key is fixedly arranged below the bottom plate, the steel pipe shear key is set to be cylindrical, rib plates are arranged on the steel pipe shear key, the rib plates are uniformly arranged around the cylindrical steel pipe shear key, one edge of each rib plate is connected with the bottom surface of the bottom plate, the bottom plate is set to be annular, the steel pipe shear key is of a structure with an opening at the top surface and a sealing at the bottom surface, the inner diameter of the bottom plate is the same as the outer diameter of the upper top surface of the steel pipe shear key, and the steel pipe shear key is welded on the top surface of the bottom plate. The utility model improves the defect of different shearing strengths in all directions, ensures the whole stress to be balanced, and can pour concrete together with the concrete-filled steel tube column structure at the upper part, thereby enhancing the integrity and effectively transmitting the shearing force.
Description
Technical Field
The utility model belongs to the technical field of concrete filled steel tube column bases, and particularly relates to a shear key device for a concrete filled steel tube column base.
Background
The steel pipe concrete structure is increasingly applied in the building industry, the structure can effectively reduce the section size of a concrete column, improve the strength of concrete and avoid the phenomena of premature local buckling and integral instability of a steel pipe. With the application of concrete filled steel tubular columns, the problem of shear resistance of the column foot portion is of increasing concern.
Shear keys are important components against horizontal shearing force, which are often used in the design of steel-structure column bases, and the reliability of the shear keys directly affects the safety of the whole structure, so the shear keys are very important in the design. At present, channel steel or I-steel shear keys are usually used in steel structure design and construction in China, and the shear keys are uneven in stress when resisting shearing force, and are easy to break due to small contact area. Therefore, it is necessary to improve the form of the shear key.
Disclosure of Invention
The shear key device enables the whole body to be stressed evenly, overcomes the defect of different shear strengths in all directions, can be used for pouring concrete together with an upper concrete-filled steel tube column structure, enhances the integrity and enables the concrete-filled steel tube column to effectively transfer shear force.
The shear key device comprises a bottom plate fixed at the bottom of a concrete filled steel tube column, wherein a steel tube shear key is fixedly arranged below the bottom plate, the steel tube shear key is cylindrical, and compared with the traditional steel channel and I-shaped steel shear keys, the cylindrical shear key has the advantages that the shear strength in each direction is consistent, the contact area is large, and the condition that the shear key is broken is avoided.
In the above technical scheme, preferably, the steel pipe shear keys are provided with rib plates, the rib plates are uniformly arranged around the cylindrical steel pipe shear keys, and one edge of each rib plate is connected with the bottom surface of the bottom plate. When the steel pipe concrete column is subjected to external force, force can be transmitted to the shear key along the column foot, and when the shear key bears shear force, the ribbed slab can bear a part of shear force, so that the connection strength of the steel pipe concrete column and the foundation is enhanced.
In the above technical scheme, it is further preferable that each rib plate is provided with a through hole, and by arranging the through holes on the rib plates, when concrete is poured on the foundation, part of the concrete enters the through holes to be solidified, so that the rib plates can be fixed in the shear grooves, and the stability of the reinforced concrete column is enhanced.
In the above technical scheme, preferably, the bottom plate is annular, the steel pipe shear keys are of a structure with an opening on the top surface and a sealing on the bottom surface, the inner diameter of the bottom plate is the same as the outer diameter of the upper top surface of the steel pipe shear keys, and the steel pipe shear keys are welded on the top surface of the bottom plate, so that the upper steel pipe concrete column structure is firmly connected with a foundation, the load at the column end is effectively transmitted to the foundation, and the force transmission is clear and easy to manufacture. And during construction, the concrete filled steel tubular column and the steel tube shear keys can be simultaneously poured with concrete.
In the above technical solution, preferably, the central axis of the steel tube shear key is coaxial with the central axis of the concrete-filled steel tube column, and the coaxial configuration avoids causing different shearing forces to be applied to the shear key in different directions.
In the technical scheme, preferably, the area of the bottom surface of the steel pipe shear key is larger than the area of the cross section of the steel pipe shear key body, and the steel pipe concrete column has a better anti-pulling effect when being subjected to pulling force by enlarging the bottom surface of the shear key.
The utility model has the advantages and positive effects that:
the steel tube shear key is arranged into a cylinder with an opening at the top surface and a sealed bottom surface by adopting a brand new technical scheme, so that the defect of different shear strengths in all directions is overcome, the stress is balanced integrally, the steel tube shear key and the concrete column structure at the upper part can be poured with concrete together, the integrity is enhanced, and the steel tube shear key can effectively transfer shear force.
Drawings
FIG. 1 is a schematic structural view of a concrete filled steel tubular column connected to a foundation according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a steel tubular concrete column and a steel tubular shear key according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a base plate according to an embodiment of the present invention.
In the figure: 1. a base plate; 1-1, through holes; 2. a steel pipe shear key; 3. a rib plate; 3-1, through holes; 4. anchor bolts; 5. a nut; 6. a steel tube concrete column.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
referring to fig. 1 to 3, an embodiment of the present invention provides a steel tube concrete column base shear key device, including a bottom plate 1, a steel tube shear key 2 and a rib plate 3, where the bottom plate 1 is fixed at the bottom of a steel tube concrete column 6, the steel tube shear key 2 is disposed below the center of the bottom plate 1, the central axis of the steel tube shear key 2 is coaxial with the central axis of the steel tube concrete column 6, and the coaxial arrangement avoids different shearing forces applied to the shear key in different directions. The steel pipe shear key 2 is cylindrical, and the cylindrical shear key is compared with the traditional channel steel and I-steel shear key, so that the shear strength in all directions is consistent, the contact area is large, and the condition that the steel pipe shear key 2 is broken is avoided. The rib plates 3 are uniformly arranged around the cylindrical steel pipe shear keys 2, one edge of each rib plate 3 is connected with the bottom surface of the bottom plate 1, when the steel pipe concrete column 6 is subjected to external force, force can be transmitted to the steel pipe shear keys 2 along the column base, and when the steel pipe shear keys 2 bear shearing force, the rib plates 3 can also bear a part of shearing force, so that the connection strength of the steel pipe concrete column 6 and a foundation is enhanced. A plurality of through holes 1-1 are distributed on the bottom plate 1, foundation bolts 4 buried in the ground bottom penetrate through the through holes 1-1, and the foundation bolts 4 are screwed and fixed with the top surface of the bottom plate 1 and the bottom surface of the bottom plate 1 through nuts 5.
In this embodiment, the number of the rib plates 3 is four, the rib plates 3 are uniformly distributed on the side surfaces of the steel pipe shear keys 2, the rib plates 3 are arranged to be right-angled triangular rib plates 3, the long right-angle edges of the rib plates 3 are connected with the side surfaces of the steel pipe shear keys 2, and the short right-angle edges are connected with the bottom surface of the bottom plate 1. The rib plate 3 is fixedly arranged on the bottom surface of the bottom plate 1 in a welding mode. Each rib plate 3 is provided with a through hole 3-1, and the through holes 3-1 are arranged on the rib plates 3, so that when concrete is poured on the foundation, part of the concrete enters the through holes 3-1 to be solidified, the rib plates 3 can be fixed in the shear grooves, and the stability of the reinforced concrete column is enhanced.
The bottom plate 1 is arranged to be circular, the steel pipe shear keys 2 are of a structure with an opening on the top surface and a sealing on the bottom surface, the inner diameter of the bottom plate 1 is the same as the outer diameter of the upper top surface of the steel pipe shear keys 2, the steel pipe shear keys 2 are welded on the top surface of the bottom plate 1, and the structure of the upper steel pipe concrete column 6 is firmly connected with a foundation, so that the load at the column end is effectively transmitted to the foundation, and the force transmission is clear and easy to manufacture. And during construction, the concrete filled steel tubular column 6 and the steel tube shear keys 2 can be simultaneously poured with concrete.
The area of the bottom surface of the steel pipe shear key 2 is larger than the area of the cross section of the steel pipe shear key 2 body, the bottom surface of the steel pipe shear key 2 is enlarged, and when the steel pipe concrete column 6 is subjected to pull-out force, the steel pipe shear key has a better anti-pull effect.
During construction, the steel tube shear keys 2 are welded on the top surface of the bottom plate 1 to form a column base shear key whole body, then the bottom plate 1 is welded on the bottom of the upper steel tube concrete column 6, and finally concrete is integrally poured.
The steel pipe shear keys 2 with different lengths and diameters can be arranged according to the shear requirements.
The shear key device for the steel pipe concrete column base is fixed by a circular bottom plate 1, and a steel pipe shear key 2 is welded at the center of the bottom plate 1. The whole device enables the foundation to be tightly connected with the concrete-filled steel tubular column 6, can well transmit axial force, shearing force and bending moment of the column end to the foundation, and cannot cause the shearing key to be damaged due to uneven stress. The device has the advantages of simple structure, convenience in installation, strong applicability and the like, and has wide development prospect and design and application value.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (5)
1. The shear key device for the steel pipe concrete column base is characterized by comprising a bottom plate fixed at the bottom of a steel pipe concrete column, wherein a steel pipe shear key is fixedly arranged below the bottom plate and is cylindrical;
the bottom plate is arranged to be circular, the steel pipe shear key is of a structure with an opening in the top surface and a sealing in the bottom surface, the inner diameter of the bottom plate is the same as the outer diameter of the upper top surface of the steel pipe shear key, and the steel pipe shear key is welded on the top surface of the bottom plate.
2. The steel tube concrete column foot shear key device of claim 1, wherein rib plates are arranged on the steel tube shear keys, the rib plates are uniformly arranged around the cylindrical steel tube shear keys, and one edge of each rib plate is connected with the bottom surface of the bottom plate.
3. The shear key device for a concrete filled steel tube column base according to claim 2, wherein each rib plate is provided with a through hole.
4. The concrete filled steel tube column foot shear key assembly of claim 1, wherein the center axis of the steel tube shear key is coaxial with the center axis of the concrete filled steel tube column.
5. The steel tube concrete column foot shear key device of claim 1, wherein the steel tube shear key has a bottom surface area greater than a cross-sectional area of the steel tube shear key body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122496065.8U CN216475895U (en) | 2021-10-15 | 2021-10-15 | Shear key device for steel pipe concrete column base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122496065.8U CN216475895U (en) | 2021-10-15 | 2021-10-15 | Shear key device for steel pipe concrete column base |
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| Publication Number | Publication Date |
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| CN216475895U true CN216475895U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122496065.8U Active CN216475895U (en) | 2021-10-15 | 2021-10-15 | Shear key device for steel pipe concrete column base |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117166611A (en) * | 2023-11-03 | 2023-12-05 | 享城科建(北京)科技发展有限公司 | Column bottom connection system and prefabricated column |
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2021
- 2021-10-15 CN CN202122496065.8U patent/CN216475895U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117166611A (en) * | 2023-11-03 | 2023-12-05 | 享城科建(北京)科技发展有限公司 | Column bottom connection system and prefabricated column |
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