CN112609728A - Steel pipe concrete column base node - Google Patents
Steel pipe concrete column base node Download PDFInfo
- Publication number
- CN112609728A CN112609728A CN202011572376.1A CN202011572376A CN112609728A CN 112609728 A CN112609728 A CN 112609728A CN 202011572376 A CN202011572376 A CN 202011572376A CN 112609728 A CN112609728 A CN 112609728A
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- China
- Prior art keywords
- column
- column base
- steel tube
- bottom plate
- foundation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
Abstract
The invention belongs to a concrete filled steel tube column base node in the field of civil engineering structures, and the technical scheme is as follows: the steel tube concrete column is positioned above the foundation, a hole is formed in the center of a column base bottom plate of the steel tube concrete column, so that the column base bottom plate is annular, a steel reinforcement cage is vertically sleeved in the root area of the steel tube concrete column, and the steel reinforcement cage comprises a vertical main reinforcement and a stirrup; the vertical main ribs downwards penetrate through the openings and are inserted into the foundation. The column base node does not need to reserve a shear key groove in foundation construction, does not need to reserve a cup opening on a bearing platform, and also does not need to reserve a pit which needs to be embedded into a steel pipe column on a foundation bottom plate, so that construction is convenient and fast, and meanwhile, cost is saved.
Description
Technical Field
The invention relates to the field of civil engineering structures, in particular to a concrete filled steel tube column base node.
Background
The steel tube concrete column has the advantages of both steel tube and concrete, and simultaneously makes up for each other's deficiencies, improves the compressive stability of steel tube and the compressive ductility of concrete, so its application in the field of structural engineering is becoming more and more extensive. The concrete filled steel tube column base node structure is commonly used at present in an end bearing type structure and an insertion type structure. Because the friction force generated by gravity cannot be considered to resist horizontal shearing force in an earthquake region, the end-bearing type steel pipe concrete column base must be provided with a shear key below a column base bottom plate, so that a shear key groove must be reserved on a foundation bottom plate or a bearing platform, and the difficulty of foundation construction is improved. No matter the inserted steel pipe concrete column base is buried in the foundation bottom plate or the cup opening is arranged in the foundation, the thickness of the foundation is increased, the reinforcement form of the foundation is influenced, the foundation cost is improved, and the construction of the foundation is more complicated. Therefore, a steel tube concrete column base node is needed, which not only meets the stress of the node, but also has simple structure and convenient construction, and simultaneously can save the cost.
Disclosure of Invention
In order to solve the technical problems, the invention provides a steel tube concrete column base node which meets the requirements of node stress, simple structure, convenience in construction and cost saving.
The technical scheme of the invention is as follows: the steel tube concrete column is positioned above the foundation, a hole is formed in the center of a column base bottom plate of the steel tube concrete column, so that the column base bottom plate is annular, a steel reinforcement cage is vertically sleeved in the root area of the steel tube concrete column, and the steel reinforcement cage comprises a vertical main reinforcement and a stirrup; the vertical main ribs downwards penetrate through the openings and are inserted into the foundation.
Based on the technical characteristics: the outer diameter of the column base bottom plate is larger than that of the steel tube concrete column, a column base stiffening rib plate and an anchor bolt are arranged on the column base bottom plate outside the column body of the steel tube concrete column, and the anchor bolt is connected with the column base bottom plate and the foundation.
Based on the technical characteristics: the steel tube concrete column is characterized in that a connecting plate is arranged on the inner side of the column body of the steel tube concrete column, one side of the connecting plate is welded with the inner wall of the steel tube concrete column, the bottom side of the connecting plate is welded with a column base bottom plate, and the surface of the connecting plate is welded with a vertical main rib of a steel reinforcement cage.
Based on the technical characteristics: the height of the steel reinforcement cage in the steel tube concrete column is 1.5 times to 2 times of the diameter of the vertical main reinforcement.
Based on the technical characteristics: the foundation includes a foundation bed or cap.
In the above technical scheme: the size of the circular hole of the column base bottom plate can be determined according to the stress requirement and the construction requirement; arranging a reinforcement cage in the concrete in the steel tube within a certain height range above a foundation slab or a bearing platform surface at the root of the steel tube concrete column, wherein the structure of the reinforcement cage is the same as that of the reinforcement cage in a common column and comprises a longitudinal main reinforcement and a stirrup, the vertical main reinforcement of the reinforcement cage is downwards inserted into the foundation slab or the bearing platform to meet the requirement of anchoring depth, and the geometric dimension of the reinforcement cage and the vertical main reinforcement and the stirrup can be determined according to the stress requirement and the construction requirement; the column base bottom plate outside the round tube of the steel tube concrete column can be provided with an anchor bolt and a column base stiffening rib plate according to requirements. In the invention, the steel tube concrete column does not need to be buried into a foundation slab or a bearing platform; the thickness of a foundation slab or a bearing platform is not additionally increased; the reinforcement of the foundation is not affected.
The invention combines the steel tube concrete column and the foundation into a whole by the steel reinforcement cage which extends the longitudinal main reinforcement downwards. The working principle is as follows: the column bottom shaft pressure of the steel tube concrete column can be borne by the steel tube and the concrete in the steel tube together; the horizontal shearing force of the bottom of the steel tube concrete column is borne by the columnar reinforced concrete part in the center of the annular column base bottom plate of the steel tube concrete column; if axial tension exists at the bottom of the steel tube concrete column, the steel tube concrete column can be borne by an anchor bolt arranged on the annular column base bottom plate. For most high-rise buildings, because the embedded end can be arranged on the top plate of the basement, most of the columns extending to the underground are subjected to small bias stress, and the bending moment and the horizontal shearing force of column bases are generally extremely small; when the pulling force is great, except enlarging the anchor bolt of the annular column base bottom plate outer ring, a connecting plate can be arranged on the column base annular bottom plate inner ring, and the vertical main rib of the reinforcement cage arranged in the steel tube concrete column is welded with the connecting plate, so that the effect of strengthening the tensile force is achieved.
The invention has the beneficial effects that: aims to provide a steel pipe concrete column base node which not only meets the stress of the node, but also has simple structure and convenient construction, and can save the cost. The column base node does not need to reserve a shear key groove in foundation construction, does not need to reserve a cup opening on a bearing platform, and also does not need to reserve a pit which needs to be embedded into a steel pipe column on a foundation bottom plate, so that construction is convenient and fast, and meanwhile, cost is saved.
Drawings
Fig. 1 is a first schematic elevation view of the present invention.
FIG. 2 is a top sectional view A-A of FIG. 1.
Fig. 3 is a schematic view of the column foot reserved anchor bolt and the vertical main reinforcement of the invention.
Fig. 4 is a detail view of the annular column base bottom plate of the present invention.
Fig. 5 is a detailed view of the anchor bolt at the base plate of the column shoe of the present invention.
Fig. 6 is a second schematic elevation view of the present invention, which is a schematic view of a column base with a relatively large pulling force.
Fig. 7 is a detailed view of a column base adopting a connecting plate in the invention.
FIG. 8 is a top sectional view B-B of FIG. 6.
The reference numbers in the figures denote: a steel pipe concrete column 1; a base 2; a vertical main rib 3; a stirrup 4; high-strength grouting material 5; an anchor bolt 6; column base stiffening rib plate 7; a column shoe bottom plate 8; a connecting plate 9; and (6) single-side welding 10.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 to 5, a steel tube concrete column 1 is located above a foundation 2, a hole is formed in the center of a column base bottom plate 8 of the steel tube concrete column 1, so that the column base bottom plate is annular, a reinforcement cage is vertically sleeved in the root area of the steel tube concrete column 1, and the reinforcement cage comprises a vertical main reinforcement 3 and a stirrup 4; the vertical main reinforcement 3 is inserted into the foundation 2 through the opening downwards. The concrete filled steel tubular column 1 shown in the figure has a circular section, and the column base bottom plate 8 is circular, which is only an illustration, and the invention is also applicable to square concrete filled steel tubular columns or other column base bottom plates with external profiles. The geometric dimension of the reinforcement cage, the vertical main reinforcement 3 and the stirrup 4 can be determined according to the stress requirement and the construction requirement. The height of the reinforcement cage, i.e. the range of the column base of the steel reinforcement cage sleeved in the steel pipe concrete column 1, can be determined according to the stress calculation and the construction requirements. In practical engineering, the height of the reinforcement cage in the concrete filled steel tubular column 1 is preferably 1.5 to 2 times of the diameter of the vertical main reinforcement 3. The vertical main reinforcement 3 of the reinforcement cage is inserted into the foundation downwards to meet the requirement of anchoring depth.
The outer diameter of the column base bottom plate 8 is larger than that of the steel tube concrete column 1, a column base stiffening rib plate 7 and an anchor bolt 6 are arranged on the column base bottom plate 8 on the outer side of the column body of the steel tube concrete column 1, and the anchor bolt 6 is connected with the column base bottom plate 8 and the foundation 2. The 360 degree uniform distribution of the stiffening ribs 7 and anchor bolts 6 shown in fig. 2 is merely illustrative.
The foundation comprises a foundation slab or a bearing platform, an anchor bolt 6 of the outer ring of a column base slab is reserved according to a conventional method during construction, and a vertical main rib 3 of a reinforcement cage is reserved in the central area of the steel tube concrete column; after the foundation concrete reaches the strength, the steel pipe column is in place, the mounting anchor bolt 6 is adjusted and positioned, and the high-strength grouting material 5 is injected at the bottom of the column base bottom plate 8; if the column bottom has no or very small pulling force, concrete can be poured into the steel tube to form the steel tube concrete column. And a high-strength grouting material 5 is adopted between the column base bottom plate 8 and the foundation surface as a conventional method.
As shown in fig. 6 to 8, if the column bottom tension is large, a welding connection plate 9 may be provided at the inner ring of the column base bottom plate 8, one side of the connection plate 9 is welded to the inner wall of the concrete-filled steel tubular column 1, the bottom side is welded to the column base bottom plate 8, and the length of the one-side welding 10 between the plate surface of the connection plate 9 and the vertical main rib 3 of the reinforcement cage may be greater than 10 times the diameter of the vertical main rib 3.
In the construction process, the vertical main reinforcement 3 of the reinforcement cage in the steel pipe column is welded with the connecting plate 9, and then concrete is poured into the steel pipe to form the steel pipe concrete column 1.
The specification of the steel reinforcement cage, the size of the column base stiffening rib plate 7 outside the steel pipe, the size of the connecting plate 9 inside the steel pipe and the like can be determined according to the calculation result of the internal force of the column base and the construction requirement.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a steel core concrete column base node, steel core concrete column (1) are located basis (2) top, its characterized in that: a hole is formed in the center of a column base bottom plate (8) of the steel tube concrete column (1), so that the column base bottom plate (8) is annular, a reinforcement cage is vertically sleeved in the root area of the steel tube concrete column (1), and the reinforcement cage comprises a vertical main reinforcement (3) and a stirrup (4); the vertical main ribs (3) downwards penetrate through the openings and are inserted into the foundation (2).
2. The concrete filled steel tube column base node according to claim 1, wherein: the external diameter of column base bottom plate (8) is greater than the external diameter of steel core concrete column (1) the shaft outside of steel core concrete column (1) set up column base stiffening rib board (7) and crab-bolt (6) on column base bottom plate (8), crab-bolt (6) are connected column base bottom plate (8) with basis (2).
3. A concrete filled steel tube column base node according to claim 1 or 2, wherein: the steel tube concrete column is characterized in that a connecting plate (9) is arranged on the inner side of the column body of the steel tube concrete column (1), one side of the connecting plate (9) is welded with the inner wall of the steel tube concrete column (1), the bottom side of the connecting plate is welded with the column base bottom plate (8), and the surface of the connecting plate (9) is welded with the vertical main rib (3) of the steel reinforcement cage.
4. The concrete filled steel tube column base node according to claim 1, wherein: the height of the steel reinforcement cage in the steel tube concrete column (1) is 1.5-2 times of the diameter of the vertical main reinforcement (3).
5. The concrete filled steel tube column base node according to claim 1, wherein: the foundation (2) comprises a foundation slab or cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011572376.1A CN112609728A (en) | 2020-12-15 | 2020-12-15 | Steel pipe concrete column base node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011572376.1A CN112609728A (en) | 2020-12-15 | 2020-12-15 | Steel pipe concrete column base node |
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| Publication Number | Publication Date |
|---|---|
| CN112609728A true CN112609728A (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011572376.1A Pending CN112609728A (en) | 2020-12-15 | 2020-12-15 | Steel pipe concrete column base node |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737950A (en) * | 2021-09-17 | 2021-12-03 | 福州大学 | Self-resetting long round steel pipe restrained reinforced concrete column base joint and construction method |
| CN113863672A (en) * | 2021-11-25 | 2021-12-31 | 中国十九冶集团有限公司 | Method for quickly constructing cylinder box concrete structure |
-
2020
- 2020-12-15 CN CN202011572376.1A patent/CN112609728A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737950A (en) * | 2021-09-17 | 2021-12-03 | 福州大学 | Self-resetting long round steel pipe restrained reinforced concrete column base joint and construction method |
| CN113863672A (en) * | 2021-11-25 | 2021-12-31 | 中国十九冶集团有限公司 | Method for quickly constructing cylinder box concrete structure |
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