Connecting joint of steel pipe column and concrete beam

Abstract

The utility model discloses a steel pipe column and concrete beam connecting joint which comprises a steel pipe column, a concrete ring beam and concrete beams, the steel pipe column is vertically arranged on the ground, and a plurality of concrete beams are transversely and evenly distributed on the periphery of the upper portion of the steel pipe column through the concrete ring beam. The steel pipe column comprises a steel pipe and a concrete structure poured in the steel pipe; the concrete ring beam comprises a concrete ring beam column cap, corbels and profile steel, the concrete ring beam column cap is connected to the periphery of the steel pipe through an inner ring vertical rib, the multiple corbels are connected to the concrete ring beam column cap, one end of each corbel is connected with the profile steel, and a concrete structure is poured on the concrete ring beam column cap; the concrete beam is of a reinforced concrete structure and comprises an upper-layer steel bar set and a lower-layer steel bar set, and the upper-layer steel bar set and the lower-layer steel bar set are both connected to the bracket. The connecting joint is simple in structure, attractive in appearance, high in connecting strength and good in force bearing and transferring effect.

Description

Technical Field

[0001] The utility model relates to the technical field of building structure construction, and particularly relates to a connecting node between a steel pipe column and a concrete beam. Background Art

[0002] With the continuous strengthening of infrastructure construction, the number of high-rise buildings and large bridges is increasing. In these large buildings, there are a large number of beam-column structures that mainly play a load-bearing role, and these beam-column structures are also crucial for the structural reliability of the entire building. Currently, there are many structural designs for beam-column structures, especially for beam-column connection nodes. Among them, the connection node between a steel reinforced concrete beam and a concrete-filled steel tube column is a typical representative and is widely used in practical engineering applications. However, the connection nodes between steel reinforced concrete beams and concrete-filled steel tube columns adopted in current engineering applications are often relatively complex in structure, and the force transmission path between the beam structure and the column structure is relatively tortuous. Therefore, the overall construction of the connection node is inconvenient, and the load-bearing and force transmission effects are not good.

[0003] The existing connection nodes mainly have the following several forms: (1) externally strengthened replacement type node: an external strengthening ring plate is arranged on the outer side of the concrete-filled steel tube column at the corresponding position of the bottom plate of the composite beam, the composite bottom plate is lapped and welded with it, and the side plate of the composite beam is directly welded to the steel tube wall. There are two specific structural forms for dealing with the negative moment reinforcement in the composite beam. One is to open holes in the wall of the concrete-filled steel tube column, and the negative moment reinforcement in the composite beam passes through the holes and penetrates the through-section area; the other structural form is to disconnect the negative moment reinforcement in the node area, and an external strengthening ring plate is connected at the position of the negative moment reinforcement on the wall of the concrete-filled steel tube column, and the negative moment reinforcement is welded to it to achieve force transmission. (2) "Carrying pole" type node: an external strengthening ring plate is arranged on the outer side of the concrete-filled steel tube column at the corresponding position of the bottom plate of the composite beam, the composite bottom plate is lapped and welded with it, the side plate of the composite beam is directly connected to the steel tube wall, and a "carrying pole" type steel plate is arranged in the node area to resist the negative moment. One side of this steel plate is welded to the outer extension edge of the U-shaped steel beam, and the other side is welded to the wall of the concrete-filled steel tube column; (3) steel bar sleeve type node: several sleeves are respectively welded at the opposite ends of the concrete-filled steel tube column wall along the length direction of the composite beam to connect the end steel bars in the negative moment area. Some of the negative moment reinforcement can also pass through the holes on the concrete-filled steel tube column to penetrate the node area. When all the negative moment reinforcement is connected through the sleeves, internal partitions are arranged at the corresponding positions on the inner wall of the steel tube as stiffening plates.

[0004] Among them, for the externally strengthened joints, since it is necessary to weld the strengthening ring on the outer side of the steel pipe column wall, obvious convex corners will be generated indoors, affecting the aesthetics. The lap welding of the steel beam bottom plate and the strengthening ring plate and the weld connection between the side plate and the steel pipe column wall increase the on-site welding workload and the weld quality is not easy to guarantee, which is not conducive to realizing industrial production. When the upper strengthening ring plate is cancelled and the reinforced through-type externally strengthened ring plate joint is adopted, due to the opening of the steel pipe column wall, there is a certain weakening of the steel pipe column, and corresponding reinforcement measures need to be taken, which not only increases the construction difficulty but also causes an increase in the steel consumption. The "shackle" type joint has a high bearing capacity and the force transmission is relatively clear, but there are hidden dangers when pouring the concrete in the joint area. If not properly handled, the construction quality is difficult to guarantee. At the same time, under the action of reciprocating loads, the steel plate in the negative moment area is prone to large relative slip with the concrete slab, and the energy dissipation performance is poor. For the reinforced sleeve type internal diaphragm joint, when all the negative moment steel bars are connected to the column wall through the steel sleeves, the weakening of the steel pipe column wall due to the opening can be prevented, but the setting of the sleeves increases the construction difficulty and cost to a certain extent. Summary of the Invention

[0005] The purpose of the present invention is to provide a connection joint between a steel pipe column and a concrete beam, which solves the problems of complex structure, poor bearing and force transmission effects of the existing connection joints between steel pipe columns and concrete beams.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A connection joint between a steel pipe column and a concrete beam, comprising a steel pipe column, a concrete ring beam and a concrete beam. The steel pipe column is vertically arranged on the ground, and a plurality of concrete beams are horizontally and evenly distributed around the upper part of the steel pipe column through the concrete ring beam;

[0008] The steel pipe column includes a steel pipe and a concrete structure poured into the steel pipe;

[0009] The concrete ring beam includes a concrete ring beam column cap, a corbel and a section steel. The concrete ring beam column cap is connected to the periphery of the steel pipe through an inner ring vertical rib. A plurality of corbels are connected to the concrete ring beam column cap. A section steel is connected to one end of the corbel. A concrete structure is poured on the concrete ring beam column cap;

[0010] The concrete beam is a reinforced concrete structure, including an upper layer steel bar group and a lower layer steel bar group, and both the upper layer steel bar group and the lower layer steel bar group are connected to the corbel.

[0011] Preferably, one end of the corbel is connected inside the concrete ring beam column cap.

[0012] Preferably, the corbel is a stepped surface structure, including an upper stepped surface and a lower stepped surface.

[0013] Preferably, the upper steel bar group includes a first row of steel bars and a second row of steel bars. The first row of steel bars is connected to the plane of the upper stepped surface close to the concrete ring beam column cap, and the second row of steel bars is connected to the plane of the upper stepped surface far from the concrete ring beam column cap.

[0014] Preferably, the number of steel bars in the second row does not exceed the number of steel bars in the first row.

[0015] Preferably, the lower steel bar group includes a third row of steel bars and a fourth row of steel bars. The third row of steel bars is connected to the plane of the lower stepped surface far from the concrete ring beam column cap, and the fourth row of steel bars is connected to the plane of the lower stepped surface close to the concrete ring beam column cap.

[0016] Preferably, the number of steel bars in the third row does not exceed the number of steel bars in the fourth row.

[0017] Preferably, a plurality of stud bolts are provided on the inner wall of the steel pipe.

[0018] Preferably, the inner ring vertical ribs include a cylindrical wall and a plurality of vertical ribs. The plurality of vertical ribs are evenly distributed around the cylindrical wall, and one side of the vertical ribs passes through the steel pipe and is connected to the concrete ring beam column cap.

[0019] Preferably, a plurality of exhaust holes are provided on the concrete structure poured in the steel pipe.

[0020] In the present utility model, the steel pipe columns are vertically arranged as the load-bearing columns of the building, the concrete beams are horizontally arranged and connected to the steel pipe columns and then used as the load-bearing beams of the building, and the concrete ring beams are arranged at the outer edge of the steel pipe as connecting ring beams.

[0021] The concrete ring beam cap column is connected to the steel pipe column through the inner ring vertical ribs, and the inner ring vertical ribs are poured in the concrete structure, increasing the connection strength; in order to further increase the connection strength, fasteners can also be added between the concrete ring beam cap column and the steel pipe wall for connection.

[0022] Concrete is also poured on the concrete ring beam column cap to hide the welds, gaps and processing convex corners in the concrete structure, increasing the aesthetics.

[0023] A corbel is installed in the concrete ring beam column cap, and the keel structure of the concrete beam is installed through the corbel. The keel structure includes a steel bar group and a section steel to increase the bearing capacity of the concrete beam as a load-bearing beam.

[0024] Wherein the steel bar group includes an upper steel bar group and a lower steel bar group. Both the upper steel bar group and the lower steel bars include two rows of steel bars. In order to facilitate the connection of the steel bar group to the corbel, the corbel is set as a stepped surface structure, including an upper stepped surface and a lower stepped surface, to cooperate with the installation of the steel bar group.

[0025] This connection node has a simple structure. The corbel, steel section, upper steel bar group, and lower steel bar group can be prefabricated and assembled in advance. During construction, appropriate inner ring vertical ribs are used for assembly and installation according to the specific quantity requirements of concrete beams. After the assembly is completed, concrete structures are poured inside the steel pipe and on the concrete ring beam column cap. Therefore, the construction is simple, the connection strength is high, and the load-bearing and force-transferring effects are good. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the A-A cross-sectional structure of the present invention;

[0028] In the figure: 1, steel pipe column; 2, concrete ring beam; 3, concrete beam; 4, inner ring vertical rib; 10, steel pipe; 11, stud; 12, exhaust hole; 20, concrete ring beam column cap; 21, corbel; 22, steel section; 30, upper steel bar group; 31, lower steel bar group; 40, cylindrical wall; 41, vertical rib; 210, upper stepped surface; 211, lower stepped surface; 300, first row of steel bars; 301, second row of steel bars; 310, third row of steel bars; 311, fourth row of steel bars. Detailed Embodiment

[0029] The following further describes the present invention with reference to the drawings:

[0030] As Figure 1 and Figure 2 shown, a connection node between a steel pipe column and a concrete beam includes a steel pipe column 1, a concrete ring beam 2, and a concrete beam 3. The steel pipe column 1 is vertically arranged on the ground. The steel pipe column 1 includes a steel pipe 10 and a concrete structure poured inside the steel pipe 10. A plurality of studs 11 are arranged on the inner wall of the steel pipe 10, and the studs 11 increase the connection strength between the steel pipe 10 and the concrete structure. A plurality of exhaust holes 12 are arranged on the concrete structure poured inside the steel pipe 10, and the exhaust holes 12 are used for exhausting air when pouring concrete into the steel pipe 10.

[0031] A plurality of concrete beams 3 are horizontally and evenly distributed around the upper periphery of the steel pipe column 1 through the concrete ring beam 2.

[0032] The concrete ring beam 2 includes a concrete ring beam column cap 20, a bracket 21, and a section steel 22. The concrete ring beam column cap 20 is connected to the periphery of the steel pipe 10 through the inner ring vertical ribs 4. In this example, in order to increase the connection strength between the concrete ring beam column cap 20 and the steel pipe 10, a connecting plate is arranged on the inner wall of the steel pipe 10, connection holes are arranged on the connecting plate, and a plurality of bolts are connected at the connection holes. The bolts connect the concrete ring beam column cap 20 and the steel pipe 10. A plurality of brackets 21 are connected to the concrete ring beam column cap 20, and a section steel 22 is connected to one end of the bracket 21. The bracket 21 and the section steel 22 are also connected through a connecting plate. A concrete structure is cast on the concrete ring beam column cap 20.

[0033] The concrete beam 3 is a reinforced concrete structure, including an upper layer steel bar group 30 and a lower layer steel bar group 31. Both the upper layer steel bar group 30 and the lower layer steel bar group 31 are connected to the bracket 21. In this example, one end of the bracket 21 is welded inside the concrete ring beam column cap 20. The bracket 21 is a stepped surface structure, including an upper stepped surface 210 and a lower stepped surface 211.

[0034] The upper layer steel bar group 30 includes a first row of steel bars 300 and a second row of steel bars 301. The first row of steel bars 300 is welded on the plane of the upper stepped surface 210 close to the concrete ring beam column cap 20, and the second row of steel bars 301 is welded on the plane of the upper stepped surface 210 far from the concrete ring beam column cap 20. The number of steel bars in the second row of steel bars 301 does not exceed the number of steel bars in the first row of steel bars 300.

[0035] The lower layer steel bar group 31 includes a third row of steel bars 310 and a fourth row of steel bars 311. The third row of steel bars 310 is welded on the plane of the lower stepped surface 211 far from the concrete ring beam column cap 20, and the fourth row of steel bars 311 is welded on the plane of the lower stepped surface 211 close to the concrete ring beam column cap 20. The number of steel bars in the third row of steel bars 310 does not exceed the number of steel bars in the fourth row of steel bars 311.

[0036] The inner ring vertical rib 4 includes a cylindrical wall 40 and a plurality of vertical ribs 41. The plurality of vertical ribs 41 are evenly distributed on the periphery of the cylindrical wall 40. One side of the vertical rib 4 passes through the steel pipe 10 and is connected to the concrete ring beam column cap 20. The inner ring vertical rib 4 is cast in the concrete structure inside the steel pipe 10, increasing the connection strength between the concrete ring beam 2 and the steel pipe column 1.

[0037] The above embodiments are only several descriptions of the concept and implementation of the present invention, and are not intended to limit it. Under the concept of the present invention, the technical solutions without substantial transformation are still within the protection scope.

Claims

1. A connection node between a steel pipe column and a concrete beam, characterized in that: It comprises a steel pipe column (1), a concrete ring beam (2) and a concrete beam (3), wherein the steel pipe column (1) is vertically arranged on the ground, and a plurality of concrete beams (3) are evenly distributed laterally on the outer periphery of the steel pipe column (1) via the concrete ring beam (2); The steel pipe column (1) comprises a steel pipe (10) and a concrete structure cast in the steel pipe (10); The concrete ring beam (2) comprises a concrete ring beam column cap (20), a corbel (21) and a steel section (22); the concrete ring beam column cap (20) is connected to the periphery of the steel pipe (10) via an inner ring vertical rib (4); a plurality of corbels (21) are connected to the concrete ring beam column cap (20); one end of the corbel (21) is connected to the steel section (22); and a concrete structure is cast on the concrete ring beam column cap (20); The concrete beam (3) is a reinforced concrete structure, comprising an upper steel bar group (30) and a lower steel bar group (31), wherein the upper steel bar group (30) and the lower steel bar group (31) are both connected to the corbel (21).

2. The connection node between a steel pipe column and a concrete beam according to claim 1, characterized in that: One end of the corbel (21) is connected inside the concrete ring beam column cap (20).

3. The connection node between a steel pipe column and a concrete beam according to claim 1 or 2, characterized in that: The corbel (21) is a stepped surface structure, comprising an upper stepped surface (210) and a lower stepped surface (211).

4. The connection node between a steel pipe column and a concrete beam according to claim 3, characterized in that: The upper layer steel bar group (30) comprises a first row of steel bars (300) and a second row of steel bars (301), the first row of steel bars (300) being connected to a plane of the upper step surface (210) close to the concrete ring beam column cap (20), and the second row of steel bars (301) being connected to a plane of the upper step surface (210) away from the concrete ring beam column cap (20).

5. The connection node between a steel pipe column and a concrete beam according to claim 4, characterized in that: The number of steel bars in the second row of steel bars (301) does not exceed the number of steel bars in the first row of steel bars (300).

6. The connection node between a steel pipe column and a concrete beam according to claim 3, characterized in that: The lower layer steel bar group (31) comprises a third row of steel bars (310) and a fourth row of steel bars (311), the third row of steel bars (310) being connected to a plane of the lower step surface (211) away from the concrete ring beam column cap (20), and the fourth row of steel bars (311) being connected to a plane of the lower step surface (211) close to the concrete ring beam column cap (20).

7. The connection node between a steel pipe column and a concrete beam according to claim 6, characterized in that: The number of steel bars in the third row of steel bars (310) does not exceed the number of steel bars in the fourth row of steel bars (311).

8. The connection node between a steel pipe column and a concrete beam according to claim 1, characterized in that: A plurality of bolts (11) are arranged on the inner wall of the steel pipe (10).

9. The connection node between a steel pipe column and a concrete beam according to claim 1, characterized in that: The inner ring vertical rib (4) comprises a cylindrical wall (40) and a plurality of vertical ribs (41), wherein the plurality of vertical ribs (41) are evenly distributed on the periphery of the cylindrical wall (40), and one side of the vertical rib (41) passes through the steel pipe (10) and is connected to the concrete ring beam column cap (20).

10. The connection node between a steel pipe column and a concrete beam according to claim 1, characterized in that: A plurality of exhaust holes (12) are provided on the concrete structure cast in the steel pipe (10).

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