CN221682103U - A steel-concrete composite beam-column joint mortise and tenon structure - Google Patents

Abstract

The utility model discloses a steel-concrete composite beam-column node mortise and tenon structure, comprising an upper steel pipe column and a lower steel pipe column; a connecting steel pipe column is further provided between the upper steel pipe column and the lower steel pipe column, the upper end of the connecting steel pipe column is fixedly connected to the lower end of the upper steel pipe column, and the lower end thereof is fixedly connected to the upper end of the lower steel pipe column. By providing a core tube in the connecting steel pipe column and providing a plurality of fixings on the core tube, the steel beam can be connected to the core tube by snapping, thereby reducing on-site welding operations and ensuring the connection strength of the node.

Description

A steel-concrete composite beam-column joint mortise and tenon structure

Technical Field

The utility model relates to the technical field of building structures, in particular to a steel-concrete composite beam-column node mortise and tenon structure.

Background Art

At present, the connection node between the outer U-shaped steel-concrete composite beam and the steel tube concrete column is the key to the stress of the building structure. In order to make the connection node between the beam and the column meet the design requirements, the traditional partition or outer ring plate design structure is generally adopted, and it is welded on-site with the column to complete the fixed connection between the beam and the column. However, since the U-shaped steel is a semi-closed section and the number of components involved in the connection node is large, the workload of on-site welding is very large. In addition, the welding of the lower side of the steel beam to the column is an overhead welding. Due to the position relationship, this welding process is difficult to operate and the quality of the weld is difficult to guarantee. Even skilled welding workers often find it difficult to ensure the quality of the weld at this welding position, which ultimately poses a major hidden danger to structural safety.

Utility Model Content

In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a mortise and tenon structure for a steel-concrete composite beam-column node, so as to solve the problems in the prior art of large welding amount, high welding difficulty, difficulty in ensuring weld quality and affecting structural safety between U-shaped steel beams and steel pipe columns.

To solve the above technical problems, the utility model adopts the following technical solutions:

A steel-concrete composite beam-column node mortise and tenon structure, comprising an upper steel pipe column and a lower steel pipe column; a connecting steel pipe column is further provided between the upper steel pipe column and the lower steel pipe column, the upper end of the connecting steel pipe column is fixedly connected to the lower end of the upper steel pipe column, and the lower end thereof is fixedly connected to the upper end of the lower steel pipe column; an inner partition is provided at the upper end of the lower steel pipe column, the lower side surface of the inner partition is fixedly connected to the upper end of the lower steel pipe column; a core tube is provided above the inner partition, the core tube is located inside the connecting steel pipe column, the axis of the core tube coincides with the axis of the connecting steel pipe column, and the lower end thereof is connected to the upper side surface of the inner partition; a plurality of fixing members are provided on the outer side surface of the core tube, the length direction of the fixing members is consistent with the length direction of the core tube, and the fixing members are L-shaped; the fixing members are located on the same outer side surface of the core tube and are One ends of two adjacent fixing members are arranged opposite to each other, and the other ends thereof are fixedly connected to the outer surface of the core tube, so that the two ends of the two adjacent fixing members on the same outer surface of the core tube that are arranged opposite to each other form a groove with the outer surface of the core tube; at least one steel beam is provided on the outer side of the connecting steel pipe column, and a groove is provided at the position corresponding to the steel beam on the connecting steel pipe column, and one end of the groove extends downward from the top of the connecting steel pipe column in a vertical direction, so that one end of the steel beam can be placed in the groove; an end plate is provided at one end of the steel beam, one side of the end plate is fixedly connected to one end of the steel beam, and the end plate can be inserted into the groove, so that the steel beam is fixedly connected to the core tube; an upper partition is also provided at the upper end of the core tube, and the upper partition is flush with the top of the steel beam and is fixedly connected to the inner wall of the core tube.

Preferably, the lower end of the end plate can extend out of the slot after being inserted into the slot, so that the upper end of the end plate is flush with the upper end of the core tube, and the lower end of the end plate is located outside the lower end of the core tube.

Preferably, a plurality of openings are provided on the inner partition and at positions corresponding to the end plates, and the openings penetrate the side walls of the inner partition which are opposite to each other, so that after the lower end of the end plate extends out from the slot, it can continue to pass through the openings and extend into the lower steel pipe column.

Preferably, a through hole I is opened in the middle of the inner partition, and the through hole I passes through the two side walls of the inner partition facing away from each other.

Preferably, a plurality of haunch plates are provided below the steel beam, the haunch plates are spaced around the core tube, one side of the haunch plate is fixedly connected to the steel beam, and the other side adjacent thereto is fixedly connected to the side of the end plate facing away from the core tube.

Preferably, a plurality of connecting plates I are provided above the connecting steel pipe column, wherein the connecting plates I are L-shaped and are fixedly connected to the upper ends of the connecting steel pipe columns.

Preferably, a connecting plate II is provided at the lower end of the upper steel pipe column, the upper side of the connecting plate II is fixedly connected to the lower end of the upper steel pipe column, and the upper steel pipe column is fixedly connected to the connecting plate I through the connecting plate II.

Preferably, a through hole II is opened in the middle of the connecting plate II, and the through hole II passes through two side walls of the connecting plate II which are away from each other.

Compared with the prior art, the utility model has the following advantages:

1. The utility model improves the structure of the node. By grooving the connecting steel pipe column and arranging fixings on the core tube, the U-shaped steel beam can be put into the groove of the steel pipe column from top to bottom, and the end plate at one end of the U-shaped steel beam is inserted into the fixings on the core tube, so as to form a lever connection. After pouring concrete, cement slurry fills the gaps between the components, making the node more firm, and also making it possible to achieve a fixed connection between the U-shaped steel beam and the connecting steel pipe column without welding, which can ensure the firmness of the connection between the two and avoid the adverse effect of welding operation on the node strength.

2. In the utility model, the upper and lower steel pipe columns can be fixedly connected to the connecting steel pipe columns by bolts. Compared with traditional connection nodes, the amount of on-site welding in the nodes of the utility model is greatly reduced, the assembly efficiency is improved, and the construction period is greatly shortened; and the node also avoids welding in the U-shaped steel cold bending area, ensuring the node connection bearing capacity and ductility.

3. In the utility model, the groove depth of the connecting steel pipe column is greater than the height of the U-shaped steel beam, so that the steel pipe column has an open area within a certain height range from the upper flange of the U-shaped steel beam. This facilitates the longitudinal reinforcement in the negative bending moment area of the composite beam to pass through the steel pipe column, solving the problem of difficulty in arranging longitudinal reinforcement in the negative bending moment area of ordinary beam-column nodes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a mortise and tenon joint structure of a steel-concrete composite beam-column joint according to the present invention.

Fig. 2 is the A-A view in Fig. 1.

FIG. 3 is a schematic diagram of the structure after the steel pipe column is connected to the inner partition.

Figure 4 is a schematic diagram of the structure after the steel beam is connected to the end plate and the haunch plate.

In the figure: upper steel pipe column 1, lower steel pipe column 2, connecting steel pipe column 3, inner partition plate 4, core tube 5, fixing piece 6, steel beam 7, slot 8, end plate 9, opening 10, through hole I 11, haunch plate 12, connecting plate I 13, connecting plate II 14, ribbed plate I 15, ribbed plate II 16, upper partition plate 17.

DETAILED DESCRIPTION

The present invention will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the present invention belong to the scope of protection of the present invention.

The utility model provides a steel-concrete composite beam-column joint mortise and tenon structure, as shown in Figures 1 to 4, comprising an upper steel pipe column 1 and a lower steel pipe column 2; a connecting steel pipe column 3 is also provided between the upper steel pipe column 1 and the lower steel pipe column 2, the upper end of the connecting steel pipe column 3 is fixedly connected to the lower end of the upper steel pipe column 1, and the lower end thereof is fixedly connected to the upper end of the lower steel pipe column 2. An inner partition 4 is provided at the upper end of the lower steel pipe column 2, and the lower side surface of the inner partition 4 is fixedly connected to the upper end of the lower steel pipe column 2. A core tube 5 is provided above the inner partition 4, and the core tube 5 is located inside the connecting steel pipe column 3, the axis of the core tube 5 coincides with the axis of the connecting steel pipe column 3, and the lower end thereof is connected to the upper side surface of the inner partition 4. A plurality of fixing members 6 are provided on the outer surface of the core tube 5, the length direction of the fixing members 6 is consistent with the length direction of the core tube 5, and the fixing members 6 are L-shaped. One end of two adjacent fixing members 6 located on the same outer surface of the core tube 5 is arranged opposite to each other, and the other end thereof is fixedly connected to the outer surface of the core tube 5, so that the two ends of the adjacent fixing members 6 on the same outer surface of the core tube 5 are arranged opposite to each other and form a slot with the outer surface of the core tube 5. At least one steel beam 7 is arranged on the outer side of the connecting steel pipe column 3, and a slot 8 is provided at the position of the corresponding steel beam 7 on the connecting steel pipe column 3, and one end of the slot 8 extends downward from the top of the connecting steel pipe column 3 in the vertical direction, so that one end of the steel beam 7 can be placed in the slot 8. The number of steel beams can be adjusted according to the positions of the upper and lower steel pipe columns, so that the node structure of the utility model can be applied to steel beams at different positions, for example, applicable to L-shaped nodes, T-shaped nodes and cross-shaped nodes. Among them, the steel beam 7 can be an I-shaped steel beam or a U-shaped steel beam, but preferably a U-shaped steel beam. An end plate 9 is provided at one end of the steel beam, and one side of the end plate 9 is fixedly connected to one end of the steel beam 7, and the end plate 9 can be inserted into the slot, so that the steel beam 7 is fixedly connected to the core tube 5. An upper partition 17 is also provided at the upper end of the core tube, and the upper partition is flush with the top of the steel beam, and the edges of the upper partition are fixedly connected to the inner wall of the core tube. After the concrete is poured, the cement slurry fills the gap between the steel and the steel, and the node is more solid after the concrete solidifies. In this way, the fixed connection between the steel beam 7 and the connecting steel pipe column 3 is achieved from the structural point of view, ensuring the connection strength of the node. At the same time, there is no need to perform welding operation between the steel beam 7 and the connecting steel pipe column 3, which not only reduces the problem of large welding volume between the U-shaped steel beam and the steel pipe column in the prior art, but also avoids the overhead welding of the lower flange of the U-shaped steel, and reduces the influence of the welding operation on the strength and ductility of the node. In addition, the upper partition 17 provided at the upper end of the core tube can transmit the internal force of the upper flange of the U-shaped steel beam, ensuring the stability of the force transmission at the upper end of the core tube; at the same time, a hole is opened in the middle of the upper partition to facilitate concrete pouring. In the specific implementation, the connecting steel pipe column is weakened due to the slotting, and the steel pipe thickness of the remaining part of the open slot should be determined according to the equal strength requirement, and the wall thickness of the connecting steel pipe column should be greater than the wall thickness of the upper and lower steel pipe columns, that is, B ₂ t ₂ f _y2 ≥ B ₁ t ₁ f _y1 , where B ₁ , t ₁ , f _y1 are the width, thickness and material yield strength of the steel plate on one side of the lower steel pipe column, and B ₂ , t ₂ , f _{y2 are} the width, thickness and material yield strength of the remaining steel plate on one side of the connecting steel pipe column.

When the U-shaped steel beam is connected to the column in two directions, that is, the grooved connection is also used at the intersection of the U-shaped steel beam. This type of connection is only suitable for the middle column node, and the beam top elevation must be consistent. When the U-shaped steel beam is connected to the column in one direction, that is, the U-shaped steel beam in one direction is penetrated, and the U-shaped steel beam in the other direction is stuck in the fixing of the through beam. This type of connection is only suitable for the middle column and side column nodes, and the through beam is required to be long enough to show the advantages of this type of node. If the through beam is too long, it will lead to difficulties in transportation and lifting, and the overall cost will not necessarily be reduced. In the utility model, the beams in both directions are non-through beams, and each column span corresponds to a beam, which is convenient for transportation and lifting. Mortise and tenon connections are realized in the column, which can adapt to different beam heights and different beam top elevations. At the same time, the utility model also takes into account the application of thin-walled steel pipe columns. The cross-sectional size of an ordinary rectangular or square steel tube concrete column should not be less than 400 mm, the thickness of the steel tube should not be less than 8 mm, and the ratio of the steel tube width to the thickness should not be greater than the limit of 60×(235/ f _ak ) ^0.5 , where f _ak is the standard value of the tensile strength of the steel tube. The thin-walled steel tube column here refers to a steel tube concrete column in which the ratio of the steel tube width to the thickness in the column exceeds the limit and the steel content is 4% to 5%. This thin-walled steel tube column has a good application prospect due to its low steel consumption, but it is found in the actual construction process that when this steel tube column is connected to the column node using the existing U-shaped steel concrete composite beam, the adverse effect of excessive welding on it will become more serious, which can neither give full play to the advantages of the thin-walled steel tube column nor ensure the strength of the node. Therefore, the node mortise and tenon structure described in the utility model can completely avoid the influence of these adverse factors on the node structure.

In some embodiments, the upper surface of the steel beam is located below the slotted notch, and the top end of the core tube is flush with the upper surface of the steel beam, that is, the entire steel beam is completely located inside the slot, and there is a gap between the upper surface of the steel beam and the slotted notch. This structure enables the steel bars above the steel beam to pass through the opposite sides of the connecting steel pipe column and the opposite sides of the core tube, reserving space for the steel bars above the steel beam without affecting the overall setting of the node.

In some embodiments, the upper surface of the steel beam is located above the notch of the slot, so that the upper surface of the steel beam is higher than the notch of the slot, but this structure will not affect the arrangement of the steel bars above the steel beam. In this embodiment, the shape of the lower end of the upper steel pipe column can be adjusted, and a slot I is also provided at the lower end of the upper steel pipe column, so that the portion of the steel beam higher than the notch of the slot can extend into the slot I, and at the same time, there is a gap between the upper surface of the steel beam and the bottom of the slot I, which can also facilitate the arrangement of the steel bars above the steel beam. This embodiment will not affect the overall strength of the node, but the node needs to be decorated later.

In the specific implementation, the lower end of the end plate can extend out of the slot after being inserted into the slot, so that the upper end of the end plate is flush with the upper end of the core tube, and the lower end of the end plate is located outside the lower end of the core tube. A plurality of openings 10 are also provided on the inner partition plate and at the position corresponding to the end plate. The openings 10 penetrate the two side walls of the inner partition plate 4 that are away from each other, so that after the lower end of the end plate 9 is extended out of the slot, it can continue to pass through the openings 10 and extend into the lower steel pipe column 2. A through hole I 11 is provided in the middle of the inner partition plate 4. The through hole I penetrates the two side walls of the inner partition plate that are away from each other, so that concrete can flow from the connected steel pipe column into the lower steel pipe column. A plurality of axil plates 12 are also provided below the steel beam 7. The axil plates 12 are distributed at intervals around the core tube 5. One side of the axil plate 12 is fixedly connected to the steel beam 7, and the other side adjacent to it is fixedly connected to the side of the end plate 9 away from the core tube 5. The axil plates can further improve the force transmission capacity of the end plate. A plurality of connection plates 113 are provided above the connecting steel pipe column 3. The connection plates 1 are L-shaped. The lower side of the connection plates 1 is fixedly connected to the upper end of the connecting steel pipe column. There is a gap between the ends of two adjacent connection plates 1 facing each other. The gap is slightly larger than the width of the steel beam, which can further expand the opening area above the steel beam and is more conducive to the longitudinal reinforcement in the negative bending moment area of the composite beam passing through the steel pipe column. A plurality of ribbed plates 115 are provided below the connection plates 1. The ribbed plates 1 are distributed at intervals along the circumference of the connecting steel pipe column. The upper side of the ribbed plates 1 is fixedly connected to the lower side of the connection plates 1, and the side close to the connecting steel pipe column is fixedly connected to the connecting steel pipe column. A connecting plate II 14 is provided at the lower end of the upper steel pipe column, the upper side of the connecting plate II is fixedly connected to the lower end of the upper steel pipe column, and the upper steel pipe column is fixedly connected to the connecting plate I through the connecting plate II, that is, the connecting plate II on the upper steel pipe column is fixedly connected to the multiple connecting plates I at the upper end of the connecting steel pipe column through high-strength bolts, which can further reduce the welding operation on site and ensure the connection strength between the upper steel pipe column and the connecting steel pipe column. A plurality of ribbed plates II 16 are provided above the connecting plate II, the ribbed plates II are distributed at intervals along the circumference of the upper steel pipe column, and the lower side of the ribbed plate II is fixedly connected to the upper side of the connecting plate II, and the side close to the upper steel pipe column is fixedly connected to the upper steel pipe column. A through hole II is opened in the middle of the connecting plate II, and the through hole II passes through the two side walls of the connecting plate II that are away from each other.

The present invention is not limited to the above-mentioned implementation modes, and structures that are the same as or similar to the above-mentioned embodiments of the present invention are all within the protection scope of the present invention.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution should be included in the scope of the claims of the utility model.

Claims (7)

1. The steel-concrete combined beam column joint mortise and tenon structure is characterized by comprising an upper steel pipe column (1) and a lower steel pipe column (2); a connecting steel pipe column (3) is arranged between the upper steel pipe column and the lower steel pipe column, the upper end of the connecting steel pipe column is fixedly connected with the lower end of the upper steel pipe column, and the lower end of the connecting steel pipe column is fixedly connected with the upper end of the lower steel pipe column;

An inner partition plate (4) is arranged at the upper end of the lower steel pipe column, and the lower side surface of the inner partition plate is fixedly connected with the upper end of the lower steel pipe column; a core pipe (5) is arranged above the inner partition plate, the core pipe is positioned in the connecting steel pipe column, the axis of the core pipe is coincident with the axis of the connecting steel pipe column, and the lower end of the core pipe is connected with the upper side surface of the inner partition plate;

The outer side surface of the core tube is provided with a plurality of fixing pieces (6), the length direction of each fixing piece is consistent with the length direction of the core tube, and each fixing piece is L-shaped; one end of each two adjacent fixing pieces is arranged on the same outer side surface of the core tube in an opposite mode, the other end of each two adjacent fixing pieces is fixedly connected with the outer side surface of the core tube, and two ends of each two adjacent fixing pieces on the same outer side surface of the core tube in an opposite mode form clamping grooves with the outer side surface of the core tube;

At least one steel beam (7) is arranged on the outer side of the connecting steel pipe column, a slot (8) is formed in the position, corresponding to the steel beam, of the connecting steel pipe column, one end of the slot extends downwards in the vertical direction from the top end of the connecting steel pipe column, and one end of the steel beam can be placed in the slot;

An end plate (9) is arranged at one end of the steel beam, one side of the end plate is fixedly connected with one end of the steel beam, and the end plate can be inserted into the clamping groove to fixedly connect the steel beam with the core pipe; an upper partition plate (17) is arranged at the upper end of the core tube, is flush with the upper part of the steel beam and is fixedly connected with the inner side wall of the core tube.

2. The steel-concrete composite beam column joint mortise and tenon joint structure according to claim 1, wherein the lower end of the end plate can extend out of the clamping groove after extending into the clamping groove, so that the upper end of the end plate is flush with the upper end of the core pipe, and the lower end of the end plate is located outside the lower end of the core pipe.

3. The steel-concrete composite beam column node mortise and tenon joint structure according to claim 2, characterized in that a plurality of holes (10) are further formed in the inner partition plate and correspond to the position of the end plate, the holes penetrate through two side walls of the inner partition plate, which are away from each other, so that the lower end of the end plate can continuously penetrate through the holes and extend into the lower steel pipe column after extending out of the clamping groove.

4. The steel-concrete combined beam column joint mortise and tenon joint structure according to claim 1, characterized in that a plurality of haunching plates (12) are further arranged below the steel beam, the haunching plates are distributed at intervals around the circumference of the core pipe, one side of each haunching plate is fixedly connected with the steel beam, and the other side adjacent to the haunching plates is fixedly connected with one side of the end plate, which is away from the core pipe.

5. The steel-concrete composite beam column joint mortise and tenon joint structure according to claim 1, characterized in that a plurality of connecting plates I (13) are arranged above the connecting steel pipe columns, the connecting plates I are L-shaped, and the connecting plates I are fixedly connected with the upper ends of the connecting steel pipe columns.

6. The steel-concrete composite beam column joint mortise and tenon joint structure according to claim 5, characterized in that a connecting plate II (14) is arranged at the lower end of the upper steel pipe column, the upper side of the connecting plate II is fixedly connected with the lower end of the upper steel pipe column, and the upper steel pipe column is fixedly connected with the connecting plate I through the connecting plate II.

7. The steel-concrete composite beam column joint mortise and tenon joint structure according to claim 6, wherein a through hole II is formed in the middle of the connecting plate II, and the through hole II penetrates through two side walls of the connecting plate II, which are away from each other.