A concrete column and h-shaped steel beam combined node structure

Abstract

The application discloses a kind of concrete column and H-shaped steel beam combined node structure, including combined node structure, combined node structure includes node prefabricated steel mould and the several groups H-shaped steel beam of uniform setting in the periphery of node prefabricated steel mould, node prefabricated steel mould is by the two groups of steel mould half ring of symmetrical setting, the connecting place of two groups of steel mould half ring is hinged by hinge and another end is all formed with butt plate.This application does not need rivet anchoring and a large number of welding, only through bolt connection between node prefabricated steel mould and H-shaped steel beam, steel mould inside can be connected with core area concrete by bolt, according to engineering needs, steel beam end can be welded with steel mould, node prefabricated steel mould and H-shaped steel beam can be used industrialized mass production, transport to construction site for installation, greatly reduce construction steps and time, avoid concrete beam in pouring process formwork, pouring and strength recovery, formwork removal and other influence construction period, improve work efficiency, reduce labor cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building frame components, in particular to a concrete column and H-shaped steel beam combined node structure. BACKGROUND

[0002] The node is an important part of connecting the frame beam and the frame column, and can effectively transmit the bending moment and shear force at the beam end. It has an important influence on the structure, and the connecting part should have sufficient bearing capacity, stiffness and ductility. In the design of steel structure, the connection mode between steel structure and concrete structure is a very important problem. The processing and installation of connection are relatively complex and labor-intensive, so it is necessary to select a suitable connection scheme and node structure. At present, the types of steel structure beam-column nodes mainly include welding, rivet connection and bolt connection. Welding is the most common connection method for steel structures. The advantages are: no need to drill holes on the steel, saving engineering quantity and time, and not reducing the cross-sectional area of the material; the connection of the component cross section is flexible, the structure is simple, and any shaped component can be directly connected without auxiliary parts; the compactness of welding is relatively good, the structural rigidity is large, and the integrity is good. The disadvantages are: high-temperature welding makes the material properties of the welded part brittle; the existence of welding residual stress and residual deformation reduces the bearing capacity of the component; in the process of structure seismic resistance, local cracks are easy to occur at the welded part, and easily expand to the whole. For the connection of heavy-duty crane beam and column and brake beam, and the node connection of truss type bridge, welding is not suitable. Rivet connection has the advantages of good plasticity, toughness and integrity, small connection deformation, reliable force transmission, easy quality inspection, and good energy consumption under dynamic load; but it has the disadvantages of large amount of steel, complex structure, troublesome construction and loud noise, and is rarely used in engineering. Bolt connection includes ordinary bolt connection and high-strength bolt connection. The advantages of ordinary bolt connection are simple construction, easy installation and disassembly. The disadvantage is that the amount of steel is large. It is suitable for structures that are installed and connected and are often disassembled. The advantages of high-strength bolt connection are saving steel, tight connection, easy installation, good stress performance, replaceable, and not easy to loosen under dynamic load. Since high-strength bolt connection contains the advantages of rivet connection and ordinary bolt connection, it gradually shows a trend of popularization.

[0003] However, the existing node installation mode of the concrete column and the H-shaped steel beam has the following problems: (1) welding is often used at the connecting node. For the connection of beam-column nodes in steel structures, welding is easily affected by external factors such as rain and high temperature, and high-altitude welding is prone to defects such as slag inclusion, porosity, incomplete penetration and undercut; (2) the existing connection mode between the concrete column and the H-shaped steel beam has poor bearing capacity, and the overall performance of the frame node is insufficient. Therefore, it is necessary to design a corresponding technical scheme to solve the existing technical problems. SUMMARY

[0004] The purpose of this invention is to provide a composite joint structure of concrete column and H-beam, which solves the problems mentioned in the background art and meets the actual use requirements.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a composite node structure of concrete column and H-beam, comprising a composite node structure, wherein the composite node structure includes a precast steel mold for the node and several sets of H-beams arranged around the precast steel mold for the node. In a circular cross-section node, the H-beams in two directions may not be perpendicular, and in a rectangular cross-section node, the steel beams in the same direction may not be on the same line. The precast steel mold for the node is composed of two sets of symmetrically arranged steel mold semi-rings. One end of the two sets of steel mold semi-rings is connected by a hinge, and the other end is processed into a butt plate. High-strength bolts are inserted between the two sets of butt plates. An end plate is processed at the connection between the H-beam and the precast steel mold for the node. Several sets of bolt holes are opened around the periphery of the end plate. Fixing bolts are inserted into the bolt holes. The inner end of the fixing bolt is threadedly fixed to the outer wall of the precast steel mold for the node. The fixing bolt and the precast steel mold for the node are welded in the factory. Several sets of studs are evenly arranged on the inner wall of the precast steel mold for the node, and concrete is poured inside. Concrete columns extend from the upper and lower ends of the concrete.

[0006] In a preferred embodiment of the present invention, the contact surface between the end plate and the node precast steel mold is processed into an arc surface structure and has the same curvature as the outer wall of the node precast steel mold.

[0007] In a preferred embodiment of the present invention, several groups of studs are located on the same horizontal plane and their length and diameter can be determined according to the column cross-sectional dimensions.

[0008] In a preferred embodiment of the present invention, the outer wall of the precast steel mold of the node is uniformly provided with several sets of threaded holes, the inner end of the fixing bolt is inserted into the threaded hole, and high-strength bolts are uniformly provided on the outer wall of the precast steel mold of the node, which can be welded in the factory without pre-reserving bolt holes.

[0009] In a preferred embodiment of the present invention, the inner cavity cross-section of the node prefabricated steel mold can be either a circular structure or a rectangular structure.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] 1. This design is simple in structure, requiring no rivet anchoring or extensive welding. The nodes are connected to the steel beams only by bolts, and the steel formwork can be connected to the core concrete area by studs. The steel formwork and steel beams are also connected by bolts. The ends of the steel beams can be welded to the steel formwork as needed. The prefabricated steel formwork for the nodes and the H-beams can be mass-produced industrially and transported to the construction site for installation, which greatly reduces construction steps and time. It avoids the impact of formwork erection, pouring, strength recovery, and formwork removal on the construction period during the concrete beam pouring process, thus improving work efficiency and reducing labor costs.

[0012] 2. The precast steel formwork at the nodes in this scheme provides effective constraint on the concrete in the core area of ​​the nodes, significantly improving the load-bearing capacity of the nodes, as well as their plasticity and toughness.

[0013] 3. The steel formwork at the nodes in this scheme does not need to be disassembled. It is connected to the core concrete area of ​​the node through the steel formwork studs, which effectively improves the integrity of the frame node. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the present invention;

[0015] Figure 2 for Figure 1 AA cross-section view;

[0016] Figure 3 for Figure 1 BB cross-section;

[0017] Figure 4 This is a structural diagram showing that the inner cavity of the precast steel mold for the node described in this invention has a rectangular cross-section;

[0018] Figure 5 for Figure 4 AA cross-section view;

[0019] Figure 6 for Figure 4 BB cross-section.

[0020] In the diagram: 1. Precast steel formwork for nodes; 2. H-beam; 3. Steel formwork semi-ring; 4. Butt plate; 5. High-strength bolt; 6. End plate; 7. Bolt hole; 8. Fixing bolt; 9. Stud; 10. Concrete; 11. Concrete column; 12. Threaded hole. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-6 This invention provides a technical solution: a composite node structure of a concrete column and an H-beam, comprising a composite node structure, which includes a precast steel mold 1 and several sets of H-beams 2 arranged around the precast steel mold 1. In a circular cross-section node, the H-beams 2 in two directions may not be perpendicular; in a rectangular cross-section node, the steel beams in the same direction may not be on the same line. The precast steel mold 1 consists of two symmetrically arranged sets of steel mold semi-rings 3, with one end of the two sets of steel mold semi-rings 3 connected by hinges, and the other end of each set having a pair of... The connecting plate 4 has high-strength bolts 5 inserted between the two sets of connecting plates 4. The connection between the H-shaped steel beam 2 and the node precast steel mold 1 is formed by processing end plates 6. Several sets of bolt holes 7 are opened on the periphery of the end plates 6. Fixing bolts 8 are inserted in the bolt holes 7. The inner end of the fixing bolt 8 is threadedly fixed to the outer wall of the node precast steel mold 1. The fixing bolt 8 and the node precast steel mold 1 are welded in the factory. Several sets of studs 9 are evenly arranged on the inner wall of the node precast steel mold 1 and concrete 10 is poured inside. Concrete columns 11 extend from the upper and lower ends of the concrete 10.

[0023] Note: The precast steel mold 1 for the node can be either a cuboid or a cylinder.

[0024] Further improvements include the fact that the contact surface between the end plate 6 and the node precast steel mold 1 is machined into an arc surface structure with the same curvature as the outer wall of the node precast steel mold 1.

[0025] Further improvements include having several sets of studs 9 on the same horizontal plane, with their length and diameter determined according to the column cross-section dimensions. The studs 9 can improve the integrity of the precast steel formwork 1 and the concrete at the node.

[0026] Further improvements include the uniform opening of several sets of threaded holes 12 on the outer wall of the node precast steel mold 1, with the inner end of the fixing bolt inserted into the threaded hole 12, and high-strength bolts 5 uniformly arranged on the outer wall of the node precast steel mold 1, which can be welded in the factory without pre-reserving bolt holes.

[0027] Specifically, the inner cavity cross-section of the node precast steel mold 1 can be either a circular structure or a rectangular structure.

[0028] In use: The diameter of the concrete column 11 of this invention is equal to the inner diameter of the precast steel mold 1 at the node. The precast steel mold 1 at the node is closed and connected by high-strength bolts 5. Concrete is poured inside the precast steel mold 1 at the node. The precast steel mold 1 at the node and the concrete column 11 are connected to the concrete 10 in the core area of ​​the node by studs 9 (the number of studs 9 can be calculated and determined according to the actual situation). An end plate 6 is welded to the end of the H-shaped steel beam 2. Several screw holes are opened on the end plate 6. The H-shaped steel beam 2 and the precast steel mold 1 at the node are connected as one unit by external fixing bolts 8 passing through the screw holes of the end plate 6. Both the precast steel mold 1 at the node and the H-shaped steel beam 2 with welded end plate 6 can be mass-produced industrially and transported to the site for construction and installation.

[0029] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A concrete column to H-shaped steel beam composite joint structure comprising a composite joint structure, characterized in that: The combined node structure comprises a node prefabricated steel mold (1) and a plurality of groups of H-shaped steel beams (2) arranged at the periphery of the node prefabricated steel mold (1), the node prefabricated steel mold (1) is composed of two groups of symmetrically arranged steel mold half-rings (3), one end of the two groups of steel mold half-rings (3) is connected by a hinge and the other end is formed with an abutting plate (4), a high-strength bolt (5) is inserted between the two groups of abutting plates (4), an end plate (6) is formed at the connection between the H-shaped steel beam (2) and the node prefabricated steel mold (1), a plurality of groups of bolt holes (7) are formed in the periphery of the end plate (6), a fixing bolt (8) is inserted into the bolt hole (7), the inner end of the fixing bolt (8) is threadedly connected with the outer wall of the node prefabricated steel mold (1), the fixing bolt (8) and the node prefabricated steel mold (1) are welded in the factory, a plurality of groups of dowels (9) are uniformly arranged on the inner wall of the node prefabricated steel mold (1) and the inside is poured with concrete (10), the upper and lower ends of the concrete (10) extend with concrete columns (11); The contact surface between the end plate (6) and the node prefabricated steel mold (1) is formed as an arc surface structure and has the same curvature as the outer wall of the node prefabricated steel mold (1); A plurality of groups of threaded holes (12) are uniformly formed in the outer wall of the node prefabricated steel mold (1), the inner end of the fixing bolt is inserted into the threaded hole (12), the node prefabricated steel mold (1) is uniformly provided with high-strength bolts (5), which can be welded in the factory, without reserving bolt holes; The inner cavity of the node prefabricated steel mold (1) can be circular structure or rectangular structure.

2. The composite column-to-H-steel beam connection structure of claim 1, wherein: A plurality of groups of the dowels (9) are in the same horizontal plane and the length and diameter can be determined according to the column cross-sectional size.

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