Enhanced connection node for edge insertion type concrete filled steel tubular column

Abstract

The utility model provides an edge insertion type reinforced connection node for a concrete filled steel tubular column, which is characterized in that an upper diaphragm plate and a lower diaphragm plate of a transverse support are respectively fixed at the positions, corresponding to the elevation positions of a beam top and a beam bottom, in a welding box type column; an upper bracket plate and a lower bracket plate are respectively arranged at the same height as the upper diaphragm plate and the lower diaphragm plate; a beam top rib and a beam bottom rib of each reinforced concrete beam respectively extend to the upper ends of the upper bracket plate and the lower bracket plate which are lapped on the outer cylindrical surface of the side where the beam top rib and the beam bottom rib are located; column longitudinal bars of the concrete-filled steel tube column encased concrete combination column penetrate through the lower bracket plate and the upper bracket plate, downward hooks are formed at the top ends of the column longitudinal bars and welded to the upper bracket plate, transverse stirrups are fixedly arranged outside the column longitudinal bars in a surrounding mode in the joint area range, and reinforcing stirrups with the diameter not smaller than that of the transverse stirrups are further arranged at the hooks. The node construction is easy to implement, the connection is stable and reliable, the structural integrity is ensured, and the anti-seismic property of the fabricated high-rise steel structure building is improved.

Description

Technical Field

[0001] The utility model relates to the field of construction, in particular to an edge-inserted steel tube concrete column reinforced connection node. Background Art

[0002] During the construction of prefabricated high-rise steel structures, vertical components often have variable cross-sections at the embedded ends or transition floors where the basement ceiling and the main structure meet. This is often very difficult to construct because of the complex load conditions and the fact that it is often the intersection of multiple components. Utility Model Content

[0003] In order to solve the above technical problems, the utility model proposes a reinforced connection node of an edge-inserted steel tube concrete column, which makes the construction at the node easy to implement and the connection is stable and reliable, which is conducive to ensuring the integrity of the structure and improving the seismic performance of prefabricated high-rise steel structure buildings.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An edge-inserted reinforced connection node for a steel tube concrete column has the following structural features: it is an edge beam-column node located at a variable cross-section of the steel tube concrete column, at which:

[0006] The column body is bounded by the bottom elevation of the reinforced concrete beam, the upper part is a welded box column, and the lower part is a steel tube concrete column wrapped with concrete composite column, and the diameter of the welded box column is smaller than the steel tube concrete column wrapped with concrete composite column;

[0007] The upper and lower transverse diaphragms with grouting holes and air holes and a plate thickness not less than the column wall thickness are fixed to the cross braces at the elevations corresponding to the beam top and beam bottom in the welded box-type column. On the outer column surfaces on each side of the reinforced concrete beam, upper and lower corbel plates are respectively arranged at the same height as the upper and lower corbel plates. A vertical stiffening plate is centrally arranged between the upper and lower corbel plates. Shear studs are also arranged on the outer column surfaces of the welded box-type column.

[0008] The top reinforcement and bottom reinforcement of each reinforced concrete beam extend toward one end of the welded box column to the upper and lower corbel plates overlapped on the outer column surface on the side, and the overlap length is not less than five times the diameter of the steel bar. The top reinforcement and the upper corbel plate, as well as the bottom reinforcement and the lower corbel plate, are welded together;

[0009] The column longitudinal reinforcement of the steel tube concrete column wrapped concrete composite column extends upward, passes through the lower corbel plate and the upper corbel plate, and the top end exposed above the upper corbel plate forms a downward hook and is welded to the upper corbel plate. In the node area, transverse stirrups with a stirrup spacing of not less than 100 mm are fixed outside the column longitudinal reinforcement, and reinforcing stirrups with a diameter not less than that of the transverse stirrups are also provided at the hook.

[0010] The structural features of the utility model also lie in:

[0011] The grouting holes and the air holes on the upper transverse partition and the lower transverse partition are respectively vertically aligned, the grouting hole is in the center, and the air holes are arranged at four corners distributed at the four corners of the plate body.

[0012] The reinforcing stirrups are provided with three.

[0013] Compared with the prior art, the beneficial effects of the utility model are embodied in:

[0014] The connection node of the utility model is suitable for the variable-section area of ​​the steel tube concrete column at the edge of the assembled high-rise steel structure. The node is strengthened through structural design, and the upper and lower corbels are arranged at the same elevation of the upper and lower transverse partitions of the column, which are connected with the top reinforcement and bottom reinforcement of the reinforced concrete beam. At the same time, transverse stirrups and reinforcing stirrups are arranged, and the column longitudinal reinforcement of the steel tube concrete column outer concrete composite column is made to penetrate the node area upward and bend and connect with the upper corbel. This connection method greatly strengthens the stiffness of the edge beam-column node, and the structure has clear force transmission and reasonable construction steps, which ensures the integrity of the structure, effectively improves the seismic performance of the assembled high-rise steel structure building, and solves the problems of complex construction method of the inserted steel tube concrete column node at the edge of the assembled high-rise steel structure and insufficient connection stiffness, and has good application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view structural schematic diagram of the utility model;

[0016] Figure 2 It is a side structural schematic diagram of the utility model.

[0017] In the figure, 1 reinforced concrete beam; 11 beam top reinforcement; 12 beam bottom reinforcement; 2 welded box column; 21 upper transverse diaphragm; 22 lower transverse diaphragm; 23 grouting hole; 24 air vent; 25 upper corbel plate; 26 lower corbel plate; 27 vertical stiffening plate; 28 shear studs; 3 steel tube concrete column wrapped concrete composite column; 31 column longitudinal reinforcement; 32 transverse stirrups; 33 strengthening stirrups. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Please refer to Figure 1 to Figure 2The reinforced connection node of the edge-inserted steel tube concrete column of this embodiment is an edge beam-column node located at the variable cross-section of the steel tube concrete column. At the node:

[0020] The column body is bounded by the bottom elevation of the reinforced concrete beam 1, the upper part is a welded box column 2, and the lower part is a steel tube concrete column wrapped concrete composite column 3, and the diameter of the welded box column 2 is smaller than the steel tube concrete column wrapped concrete composite column 3;

[0021] An upper transverse diaphragm 21 and a lower transverse diaphragm 22 with grouting holes 23 and air holes 24 and a plate thickness not less than the column wall thickness are fixed to the welded box-type column 2 at the elevations corresponding to the beam top and beam bottom, respectively. An upper corbel plate 25 and a lower corbel plate 26 are respectively arranged at the same height as the upper corbel plate 21 and the lower corbel plate 22 on the outer column surface of each side of the reinforced concrete beam 1, and a vertical stiffening plate 27 is centrally arranged between the upper corbel plate 25 and the lower corbel plate 26. A shear stud 28 is also arranged on the outer column surface of the welded box-type column 2;

[0022] The top reinforcement 11 and the bottom reinforcement 12 of each reinforced concrete beam 1 extend toward one end of the welded box column 2 to the upper ends of the upper corbel plate 25 and the lower corbel plate 26 overlapped on the outer column surface of the side, and the overlap length is not less than five times the diameter of the steel bar. The top reinforcement 11 and the upper corbel plate 25, as well as the bottom reinforcement 12 and the lower corbel plate 26 are welded and connected;

[0023] The column longitudinal reinforcement 31 of the steel tube concrete column wrapped concrete composite column 3 extends upward, passes through the lower corbel plate 26 and the upper corbel plate 25, and the top end exposed above the upper corbel plate 25 forms a downward hook and is welded to the upper corbel plate 25. In the node area, transverse stirrups 32 with a stirrup spacing of not less than 100 mm are fixed outside the column longitudinal reinforcement 31, and reinforcing stirrups 33 with a diameter not less than the transverse stirrups 32 are also provided at the hook.

[0024] In the specific implementation, the corresponding structural settings also include:

[0025] The grouting holes 23 and the air holes 24 on the upper transverse partition 21 and the lower transverse partition 22 are respectively vertically aligned, the grouting hole 23 is in the center, and the air holes 24 are provided at four corners of the plate body.

[0026] Three reinforcing stirrups 33 are provided.

[0027] The construction can be carried out according to the following steps:

[0028] a. Support the formwork of reinforced concrete beams 1 and columns. Use lap plates to set upper diaphragms 21 and lower diaphragms 22 at the beam top and beam bottom elevations. The plate thickness is not less than the wall thickness of the welded box-type column 2. Grouting holes 23 are opened in the center of the upper diaphragm 21 and the lower diaphragm 22, and air holes 24 are opened at the four corners. Shear studs 28 are set on the outer side of the welded box-type column 2;

[0029] b. The outer surface of the welded box column 2 is welded with a steel bar with a diameter of 16 mm at the same height as the upper diaphragm 21 and the lower diaphragm 22, which is used to connect the upper corbel plate 25 and the lower corbel plate 26. Double-sided groove welding is adopted between the steel bar and the corbel plate, and a 10 mm thick vertical stiffening plate 27 is set between the upper corbel plate 25 and the lower corbel plate 26. Holes must be opened on the upper corbel plate 25 and the lower corbel plate 26 where the stirrups pass through. The welded box column 2 is not provided with the corbel on the outer surface without a concrete beam;

[0030] c. The top reinforcement 11 and the bottom reinforcement 12 of the reinforced concrete beam 1 are respectively extended to overlap the upper ends of the upper corbel plate 25 and the lower corbel plate 26 to form an overlap welding, and the overlap length is not less than 5 times the diameter of the top reinforcement 11 and the bottom reinforcement 12;

[0031] d. The transverse stirrups 32 of the steel tube concrete column wrapped concrete composite column 3 in the node area are densely packed throughout the entire length, and the spacing between stirrups shall not be less than 100mm. In addition, reinforcing stirrups 33 with a diameter not less than that of the transverse stirrups 32 are provided at the hooks of the column longitudinal reinforcement 31, and the diameter of the reinforcing stirrups 33 shall not be less than that of the transverse stirrups 32;

[0032] e. The longitudinal reinforcement 31 of the steel tube concrete column wrapped concrete composite column 3 must penetrate upwards into the node area, and be hook-welded at the upper corbel plate 25 to form a substantial connection with the upper corbel plate 25;

[0033] f. Pour concrete and pour the inside of the welded box column 2 at the same time, vibrate and fill it densely, maintain and remove the formwork.

[0034] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A reinforced connection node of an edge-inserted steel tube concrete column, characterized in that: It is the edge beam-column node located at the variable section of the steel tube concrete column. At the node: The column body is bounded by the bottom elevation of the reinforced concrete beam, the upper part is a welded box column, and the lower part is a steel tube concrete column wrapped with concrete composite column, and the diameter of the welded box column is smaller than the steel tube concrete column wrapped with concrete composite column; The upper and lower transverse diaphragms with grouting holes and air holes and a plate thickness not less than the column wall thickness are fixed to the cross braces at the elevations corresponding to the beam top and beam bottom in the welded box-type column. On the outer column surfaces on each side of the reinforced concrete beam, upper and lower corbel plates are respectively arranged at the same height as the upper and lower corbel plates. A vertical stiffening plate is centrally arranged between the upper and lower corbel plates. Shear studs are also arranged on the outer column surfaces of the welded box-type column. The top reinforcement and bottom reinforcement of each reinforced concrete beam extend toward one end of the welded box column to the upper and lower corbel plates overlapped on the outer column surface on the side, and the overlap length is not less than five times the diameter of the steel bar. The top reinforcement and the upper corbel plate, as well as the bottom reinforcement and the lower corbel plate, are welded together; The column longitudinal reinforcement of the steel tube concrete column wrapped concrete composite column extends upward, passes through the lower corbel plate and the upper corbel plate, and the top end exposed above the upper corbel plate forms a downward hook and is welded to the upper corbel plate. In the node area, transverse stirrups with a stirrup spacing of not less than 100 mm are fixed outside the column longitudinal reinforcement, and reinforcing stirrups with a diameter not less than that of the transverse stirrups are also provided at the hook.

2. The edge-inserted reinforced connection node of steel tube concrete column according to claim 1 is characterized in that: The grouting holes and the air holes on the upper transverse partition and the lower transverse partition are respectively vertically aligned, the grouting hole is in the center, and the air holes are arranged at four corners distributed at the four corners of the plate body.

3. The edge-inserted reinforced connection node of steel tube concrete column according to claim 1 is characterized in that: The reinforcing stirrups are provided with three.

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