CN113216417A - Connecting joint for transition from rectangular concrete-filled steel tube column to steel reinforced concrete column and construction method thereof - Google Patents
Connecting joint for transition from rectangular concrete-filled steel tube column to steel reinforced concrete column and construction method thereof Download PDFInfo
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- CN113216417A CN113216417A CN202110551751.2A CN202110551751A CN113216417A CN 113216417 A CN113216417 A CN 113216417A CN 202110551751 A CN202110551751 A CN 202110551751A CN 113216417 A CN113216417 A CN 113216417A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
Abstract
The invention relates to a connecting node for a rectangular steel tube concrete column to be transited to a section steel concrete column and a construction method, wherein the connecting node comprises a main node and a transition node, and the main node is positioned above the transition node; the transition joint comprises an upper column base bottom plate, a lower column base bottom plate, a cross-shaped steel stiffening plate, a lower vertical stiffening plate, a peripheral steel pipe wall, an upper column base bottom plate grouting hole, a lower column base bottom plate grouting hole and core concrete; the upper column base bottom plate and the lower column base bottom plate are respectively positioned at the top end and the bottom end of the peripheral steel pipe wall and are welded with the peripheral steel pipe wall, the core concrete is positioned in a space enclosed by the upper column base bottom plate, the lower column base bottom plate and the peripheral steel pipe wall, and the cross-shaped steel stiffening plate and the lower vertical stiffening plate are embedded in the core concrete; the main node comprises an upper vertical stiffening plate and a longitudinal bar connecting plate which are positioned in the profile steel concrete column; the upper vertical stiffening plate and the longitudinal bar connecting plate are respectively welded with the upper column base bottom plate; the transition node is located above the beam. The invention has the advantages of definite force transmission, controllable performance, simple and convenient construction and the like.
Description
Technical Field
The invention relates to the field of building structures, in particular to a connecting node for a rectangular concrete-filled steel tube column to be transited to a section steel concrete column and a construction method thereof.
Background
With the development of super high-rise building structure technology, the outer frame column of the mixed structure has larger stress at the lower part of the building, a steel pipe concrete column is often adopted to control the size of the cross section, and a section steel concrete column or a reinforced concrete column is used at the upper part to save the manufacturing cost. In this case, the connection problem of the lower steel tubular concrete column and the upper steel reinforced concrete column is encountered. Therefore, a reasonable transition connection node from the steel pipe concrete column to the steel reinforced concrete column is needed, so that the lower part of the steel pipe concrete column is connected with the upper steel reinforced concrete column reasonably and efficiently.
In the constructed structure, when the steel pipe concrete column is connected with the section steel concrete column, four outer walls of the section of the rectangular steel pipe concrete column are generally directly welded with the flange of the section steel concrete column, when the side lengths of the upper part and the lower part are different, the connection of section steel and a steel bar in the section steel concrete and the section steel concrete column is very complicated, and a connecting node is generally positioned in the intersection area of a beam and the column, so that the structure is complicated, the construction is inconvenient, and the quality is not easy to guarantee. In order to overcome the problems, the invention provides a novel connecting node, avoids the complex structure of the crossed nodes of the beam and the column, greatly facilitates construction, can realize the whole manufacture of the transition connecting node in a factory and field installation, furthest reduces field welding operation, and has the advantages of clear force transmission, controllable performance, simple and convenient construction and the like.
Disclosure of Invention
The invention aims to solve the problem of reasonable transition connection between a rectangular concrete-filled steel tube column and a profile steel concrete column with larger stress and larger section, and provides a connecting node for transition from the rectangular concrete-filled steel tube column to the profile steel concrete column and a construction method thereof.
In order to achieve the purpose, the invention provides a connecting node for a rectangular steel tube concrete column to be transited to a section steel concrete column, which comprises a main node and a transition node connected with the main node, wherein the main node is positioned above the transition node; the main node and the transition node are connected in an equal strength mode; the section steel concrete column and the rectangular steel tube concrete column are connected through the main node and the transition node; the transition joint comprises cross-shaped steel, an upper column base bottom plate, a lower column base bottom plate, a cross-shaped steel stiffening plate connected with the cross-shaped steel, a lower vertical stiffening plate, a peripheral steel pipe wall and core concrete; the upper column base bottom plate and the lower column base bottom plate are respectively positioned at the top end and the bottom end of the peripheral steel pipe wall and are welded with the peripheral steel pipe wall, the core concrete is positioned in a space enclosed by the upper column base bottom plate, the lower column base bottom plate and the peripheral steel pipe wall, and the cross-shaped steel, the cross-shaped steel stiffening plate and the lower vertical stiffening plate are embedded in the core concrete and are welded with the peripheral steel pipe wall; the main node comprises an upper vertical stiffening plate and a longitudinal rib connecting plate, the upper vertical stiffening plate and the longitudinal rib connecting plate are positioned in the profile steel concrete column, the longitudinal rib connecting plate is welded with longitudinal ribs of the profile steel concrete column, and the upper vertical stiffening plate is welded with profile steel of the profile steel concrete column; the upper vertical stiffening plate and the longitudinal bar connecting plate are respectively welded with the upper column base bottom plate; the upper vertical stiffening plate is welded with the longitudinal bar connecting plate; the transition node is located above the beam connected to the rectangular concrete-filled steel tube column and located between the rectangular concrete-filled steel tube column and the section steel concrete column.
The side length of the cross section of the rectangular steel tube concrete column and the side length of the cross section of the profile steel concrete column can be unequal, the minimum side length of the cross section of the rectangular steel tube concrete column is preferably more than or equal to 0.8m, and the minimum side length of the cross section of the profile steel concrete column is preferably more than or equal to 0.6 m.
The section steel in the section steel concrete column is cross section steel or H-shaped steel. When the section steel is cross section steel, the number of the upper vertical stiffening plates is eight; each flange of the four flanges of the cross-shaped steel, the longitudinal rib connecting plate and the two upper vertical stiffening plates are enclosed to form a square frame structure.
The invention provides a connecting node for a rectangular steel tube concrete column to be transited to a section steel concrete column, wherein the distance between a lower column base bottom plate and a beam connected to the rectangular steel tube concrete column is more than or equal to 500mm, and the transition node is a connecting node with the inclination of less than 1:6, the length of which is equal to two times of the length of a medium-sized steel edge of the section steel concrete column and is not less than 2m, and the longitudinal section of which is rectangular, right trapezoid or isosceles trapezoid. The transition node is located at a certain distance outside the intersection node area of the beam and the column, and the distance is generally more than or equal to 500 mm; and arranging a transitional connection node with the inclination smaller than 1:6 (when the side lengths of the sections of the rectangular steel tube concrete column and the section steel concrete column are not equal), the length L equal to 2hc (hc is the larger side length of the cross section steel or the H section steel) and not smaller than 2m in the area close to the top of the lower section column.
The longitudinal ribs of the profile steel concrete column are connected with the two sides of the longitudinal rib connecting plate in a welding mode.
And the upper column base bottom plate and the lower column base bottom plate are both provided with a plurality of grouting holes with the diameter not less than 200 mm.
The main node and the transition node are connected in an equal strength mode, and the welding connection between the main node and the transition node is a primary full penetration welding seam connection. Furthermore, in order to realize equal-strength connection, the welding seams of the upper column base bottom plate 1 and the lower column base bottom plate 2 connected with the peripheral steel pipe wall 13 are all primary full penetration welding seams; the welding seams of the cross-shaped steel or H-shaped steel 14, the cross-shaped steel stiffening plate 3, the upper vertical stiffening plate 4, the longitudinal bar connecting plate 5 and the lower vertical stiffening plate 9, the upper column base bottom plate 1 and the lower column base bottom plate 2 are all one-stage full penetration welding seams.
Furthermore, the longitudinal ribs 7 of the steel concrete column and the longitudinal rib connecting plates 5 are welded on two sides, and the welding length is determined by calculation according to the principle of equal-strength connection.
Furthermore, concrete should be poured in the core area of the transition node, and a plurality of grouting holes with the diameter not less than 200mm should be formed in the upper column base bottom plate 1 and the lower column base bottom plate 2.
And modeling the transition layer containing the connecting nodes according to the section of the steel reinforced concrete column, calculating to obtain the size of the section and the reinforcing bars of the steel reinforced concrete column, and rechecking the transition layer according to the section of the steel reinforced concrete column to ensure that the transition layer can meet the calculation requirements under two section forms.
The invention also provides a construction method for the connection node for the transition of the rectangular steel tube concrete column to the section steel concrete column, which comprises the steps of firstly manufacturing a transition node frame except core concrete and cross section steel or H section steel with the height of 1.5m above an upper column foot bottom plate of the transition node frame in a factory, then welding the transition node with the rectangular steel tube concrete column at the position 500mm above a lower layer beam surface, then welding longitudinal ribs of the section steel concrete column with longitudinal rib connecting plates, and finally pouring concrete into the section steel concrete column and the transition node frame.
The invention can be used for the transition connection of the rectangular steel tube concrete column with larger stress and larger section and the section steel concrete column. The invention extends the lower layer steel pipe concrete column (hereinafter referred to as lower column) upwards, simultaneously anchors the section steel in the section steel concrete column (hereinafter referred to as upper column) into the transition section, realizes the equal strength connection of the upper column and the lower column through the connection node section by the internal force of the upper column and the lower column through the upper column base bottom plate and the lower column base bottom plate, realizes the transition from the steel pipe concrete column to the section steel concrete, and can be used for the condition that the section side lengths of the rectangular steel pipe concrete column and the section steel concrete column are not equal. The transition connection node and the upper and lower section columns can be manufactured in a factory, after the transition connection node and the upper and lower section columns are installed on site, the steel bars of the section steel concrete column are welded with the connecting plate, and then concrete is poured. The design of the connecting joint avoids the complex structure of the crossed joint of the beam and the column, greatly facilitates construction, can realize the whole manufacture and field installation of the connecting joint in a factory, reduces the field welding operation to the maximum extent, and has the advantages of clear force transfer, controllable performance, simple and convenient construction and the like.
Drawings
FIG. 1 is a schematic structural view of a connection node according to the present invention (when the lengths of the cross-sectional sides of the rectangular steel tube concrete column and the steel concrete column are equal, the longitudinal section of the transition node is rectangular);
FIG. 2 is a schematic structural diagram of a connection node according to the present invention (when the cross-sections of the rectangular steel tube concrete column and the steel concrete column are single-side obliquely transited, that is, the longitudinal section of the transition node is right trapezoid);
FIG. 3 is a schematic structural diagram of a connection node according to the present invention (when the cross-sections of the rectangular steel tube concrete column and the steel concrete column are bilaterally and obliquely transited, the longitudinal section of the transition node is isosceles trapezoid);
FIG. 4 is a cross-sectional view taken along line 1-1 of FIGS. 1, 2 and 3 (when cross-section steel is used in the steel concrete column);
FIG. 5 is a sectional view taken along line 1-1 of FIGS. 1, 2 and 3 (when H-section steel is used in the steel concrete column);
fig. 6 is a cross-sectional view 2-2 of fig. 1, 2 and 3.
Detailed Description
Referring to fig. 1 to 6, the transition joint is located at a distance outside the intersection joint area of the beam and the column, and generally, the distance is greater than or equal to 500 mm; and arranging a transitional connection node with the inclination smaller than 1:6 (when the side lengths of the sections of the rectangular steel tube concrete column and the section steel concrete column are not equal), the length L equal to 2hc (hc is the larger side length of the cross section steel or the H section steel) and not smaller than 2m in the area close to the top of the lower section column.
Referring to fig. 1, 2 and 3, the transition joint is composed of an upper column base bottom plate 1, a lower column base bottom plate 2, a cross-shaped steel stiffening plate 3, an upper vertical stiffening plate 4, a longitudinal bar connecting plate 5, a lower vertical stiffening plate 9, a peripheral steel pipe wall 13, an upper column base bottom plate grouting hole 6, a lower column base bottom plate grouting hole 10 and core concrete 15.
In order to realize equal-strength connection, the welding seams of the upper column base bottom plate 1 and the lower column base bottom plate 2 connected with the peripheral steel pipe wall 13 are all primary full penetration welding seams; the welding seams of the cross-shaped steel or H-shaped steel 14, the cross-shaped steel stiffening plate 3, the upper vertical stiffening plate 4, the longitudinal bar connecting plate 5 and the lower vertical stiffening plate 9, the upper column base bottom plate 1 and the lower column base bottom plate 2 are all one-stage full penetration welding seams.
The longitudinal bar 7 and the longitudinal bar connecting plate 5 of the steel concrete column are welded on two sides, and the welding length is calculated and determined according to the principle of equal-strength connection. And at least the following conditions should be satisfied: the welding length is not less than 10 times of the diameter of the connecting steel bar; the stirrup interval of the steel concrete column stirrup 8 is 50mm within the range of 500mm above the upper column base bottom plate 1, and the diameter of the stirrup of the same type steel concrete column 11 encryption area is not less than 10 mm.
Concrete should be poured in the core area of the transition joint, and a plurality of grouting holes with the diameter not less than 200mm should be formed in the upper column base bottom plate 1 and the lower column base bottom plate 2.
Firstly, manufacturing a transition node and cross-shaped steel or H-shaped steel 14 with the height of 1.5m above an upper column foot bottom plate 1 of the transition node in a factory, then welding the node with a lower column 500mm above a lower layer beam surface, then welding a longitudinal rib 7 of a steel concrete column with a longitudinal rib connecting plate 5, and finally pouring concrete into the node.
The lower vertical stiffening plate 9 is mainly arranged for increasing the bonding between the core concrete 15 and the peripheral steel pipe wall 13 and improving the out-of-plane stability of the steel pipe wall, and can be designed according to the structural requirements of the stiffening plate.
The thickness of the upper and lower column foot sole plates is determined by calculating the bending moment and the shearing force born by the column foot sole plates.
The thickness of the cross-shaped steel stiffening plate 3 is respectively equal to the thickness of the web flange of the cross-shaped steel or the H-shaped steel 14.
The longitudinal rib connecting plate 5 and the longitudinal rib should be designed to have equal strength. Meanwhile, the thickness of the longitudinal rib connecting plate is not less than 20mm, and the structural requirement of the stiffening plate is met, so that enough rigidity is ensured, and the shear key can play a role.
The height of the upper vertical stiffening plate 4 is determined by calculation, and the column load shared by the cross-shaped steel or the H-shaped steel can be effectively transmitted to the upper column base bottom plate 1.
And modeling the transition layer containing the connecting nodes according to the section of the steel reinforced concrete column, calculating to obtain the size of the section and the reinforcing bars of the steel reinforced concrete column, and rechecking the transition layer according to the section of the steel reinforced concrete column to ensure that the transition layer can meet the calculation requirements under two section forms.
The construction method for the connection node for the transition of the rectangular steel tube concrete column to the section steel concrete column comprises the steps of firstly manufacturing a transition node frame except core concrete and cross section steel or H section steel with the height of 1.5m above an upper column foot bottom plate of the transition node frame in a factory, then welding the transition node with the rectangular steel tube concrete column 500mm above a lower layer beam surface, then welding longitudinal ribs and longitudinal rib connecting plates of the section steel concrete column, and finally pouring concrete into the section steel concrete column and the transition node frame.
Claims (8)
1. A connection node for a rectangular steel tube concrete column to transit to a section steel concrete column is characterized by comprising a main node and a transition node connected with the main node, wherein the main node is positioned above the transition node; the main node and the transition node are connected in an equal strength mode; the section steel concrete column and the rectangular steel tube concrete column are connected through the main node and the transition node; the transition joint comprises cross-shaped steel, an upper column base bottom plate, a lower column base bottom plate, a cross-shaped steel stiffening plate connected with the cross-shaped steel, a lower vertical stiffening plate, a peripheral steel pipe wall and core concrete; the upper column base bottom plate and the lower column base bottom plate are respectively positioned at the top end and the bottom end of the peripheral steel pipe wall and are welded with the peripheral steel pipe wall, the core concrete is positioned in a space enclosed by the upper column base bottom plate, the lower column base bottom plate and the peripheral steel pipe wall, the cross-shaped steel stiffening plate and the lower vertical stiffening plate are embedded in the core concrete, and the cross-shaped steel stiffening plate and the lower vertical stiffening plate are welded with the peripheral steel pipe wall; the main node comprises an upper vertical stiffening plate and a longitudinal rib connecting plate, the upper vertical stiffening plate and the longitudinal rib connecting plate are positioned in the profile steel concrete column, the longitudinal rib connecting plate is welded with longitudinal ribs of the profile steel concrete column, and the upper vertical stiffening plate is welded with profile steel of the profile steel concrete column; the upper vertical stiffening plate and the longitudinal bar connecting plate are respectively welded with the upper column base bottom plate; the upper vertical stiffening plate is welded with the longitudinal bar connecting plate; the transition node is positioned above a beam connected to the rectangular concrete-filled steel tube column; the minimum side length of the section of the rectangular steel tube concrete column is more than or equal to 0.8m, and the minimum side length of the section of the steel tube concrete column is more than or equal to 0.6 m.
2. The connection node for the transition of a rectangular steel tube concrete column to a steel reinforced concrete column according to claim 1, wherein the steel reinforced concrete column is cross-shaped steel.
3. The connection node for the transition of the rectangular concrete filled steel tube column to the section steel concrete column according to claim 2, wherein the number of the upper vertical stiffening plates is eight; each of the four flanges of the section steel concrete column section steel, the longitudinal rib connecting plate and the two upper vertical stiffening plates are enclosed to form a square frame structure.
4. The connection node for the transition of the rectangular steel tube concrete column to the section steel concrete column according to claim 1, 2 or 3, wherein the distance between the lower column base bottom plate and the beam connected to the rectangular steel tube concrete column is greater than or equal to 500mm, and the transition node is a rectangular, right trapezoid or isosceles trapezoid connection node with the inclination smaller than 1:6 and the length equal to two times the length of the medium-sized steel side of the section steel concrete column and not smaller than 2 m.
5. The connection node for the transition of the rectangular concrete-filled steel tube column to the section steel concrete column according to claim 1, 2 or 3, wherein longitudinal bars of the section steel concrete column are connected with longitudinal bar connecting plates in a double-sided welding mode.
6. The connection node for the transition of the rectangular concrete-filled steel tube column to the section steel concrete column according to claim 1, 2 or 3, wherein each of the upper column base bottom plate and the lower column base bottom plate is provided with a plurality of grouting holes with the diameter not less than 200 mm.
7. The connection node for the transition of a rectangular concrete filled steel tube column to a section steel concrete column according to claim 1, 2 or 3, wherein the number of upper vertical stiffening plates is equal to the number of lower vertical stiffening plates.
8. The method for constructing a joint for the transition of a rectangular steel tube concrete column to a profile steel concrete column according to claim 1, 2 or 3, wherein the transition joint frame except the core concrete and the cross-shaped steel or H-shaped steel with a height of 1.5m above the upper column foot bottom plate thereof are first fabricated in a factory, then the transition joint is welded with the rectangular steel tube concrete column 500mm above the lower beam surface, then the longitudinal bars of the profile steel concrete column are welded with the longitudinal bar connecting plates, and finally concrete is poured into the profile steel concrete column and the transition joint frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110551751.2A CN113216417B (en) | 2021-05-20 | 2021-05-20 | Connecting joint for transition from rectangular steel pipe concrete column to section steel concrete column and construction method of connecting joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110551751.2A CN113216417B (en) | 2021-05-20 | 2021-05-20 | Connecting joint for transition from rectangular steel pipe concrete column to section steel concrete column and construction method of connecting joint |
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| Publication Number | Publication Date |
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| CN113216417A true CN113216417A (en) | 2021-08-06 |
| CN113216417B CN113216417B (en) | 2023-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114737671A (en) * | 2022-04-12 | 2022-07-12 | 中国航空规划设计研究总院有限公司 | Connecting structure and method for steel pipe concrete column and steel node and transition connecting member |
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| CN113216417B (en) | 2023-04-07 |
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