Light steel beam-column joint assembly type connecting structure

Abstract

The utility model discloses a light steel beam column node assembly type connecting structure, this light steel beam column node assembly type connecting structure includes: preset on the column connecting component of light steel column and set up in the beam connecting component of light steel beam end, the column connecting component includes at least one column node board, be equipped with two symmetrical arrangement and the inclined guide groove of inclination to the direction of column core on the column node board, the beam connecting component includes a beam end connecting plate, one pair of wedge-shaped sliding block is symmetrically arranged to the both sides of beam end connecting plate, the wedge-shaped sliding block has the inclined plane of cooperation with the inclined guide groove, the light steel beam column node assembly type connecting structure still includes at least one drive bolt through the beam end connecting plate and the column node board. Light steel beam column node assembly type connecting structure has solved the contradiction that rigidity and installation efficiency are difficult to obtain in traditional assembly type steel structure node through bidirectional wedge-shaped self-locking structure.

Description

Technical Field

[0001] This utility model relates to the technical field of light steel beam-column connection structure, and in particular to a prefabricated connection structure for light steel beam-column nodes. Background Technology

[0002] Light steel structure systems are widely used in industrial plants, warehouses, low-rise and multi-story residential buildings, and public buildings due to their advantages such as light weight, high strength, fast construction speed, and recyclable materials. In this system, the connection performance of beam-column joints directly determines the overall stiffness, stability, load-bearing capacity, and seismic performance of the structure, making it a crucial aspect of structural design. Currently, the connection methods for light steel beam-column joints are mainly divided into two categories: welded connections and bolted connections.

[0003] Welding is a traditional rigid connection method, achieved by welding the beam ends to the column directly or through connecting plates on the construction site. While this method can form rigid nodes and transfer bending moments, it has the following significant drawbacks: 1) The quality of on-site welding is greatly affected by factors such as the welder's skill level and weather conditions, easily resulting in defects such as porosity, slag inclusions, and incomplete fusion, making it difficult to guarantee quality; 2) The high temperatures generated during welding can create localized heat-affected zones in the steel, potentially leading to material degradation and significant residual welding stress and deformation; 3) The construction process requires specialized welding equipment and personnel, is complex, has low efficiency, and involves open flame operations, posing certain safety risks; 4) The nodes are permanent connections, making it inconvenient for later structural modifications and dismantling, which does not align with the concepts of green building and building recycling. Utility Model Content

[0004] Therefore, it is necessary to provide a prefabricated connection structure for light steel beam-column joints to address the existing problems with light steel beam-column joints.

[0005] A light steel beam-column node prefabricated connection structure includes a column connection component pre-installed on a light steel column and a beam connection component disposed at the end of a light steel beam. The column connection component includes at least one column node plate, and the column node plate is provided with two symmetrically arranged guide grooves inclined towards the column center. The beam connection assembly includes a beam end connection plate, and a pair of wedge-shaped sliders are symmetrically arranged on both sides of the beam end connection plate; The wedge-shaped slider has an inclined surface that mates with the guide groove; The light steel beam-column joint assembly connection structure also includes at least one drive bolt that passes through the beam end connection plate and the column joint plate. When the drive bolt is tightened, the wedge-shaped slider slides along the guide groove, causing bidirectional compression and locking between the beam end connecting plate and the column node plate, thereby completing the assembly connection of the beam and column.

[0006] In one embodiment, the wedge-shaped slider and the beam end connecting plate are slidably engaged by a dovetail groove or a T-groove structure, thereby defining the connection method between the wedge-shaped slider and the beam end connecting plate.

[0007] In one embodiment, shear keys and shear grooves with concave-convex fits are respectively provided on the contact surfaces of the beam end connecting plate and the column node plate.

[0008] In one embodiment, one or more sets of adjustable-thickness gaskets are provided between the beam end connecting plate and the column node plate.

[0009] In one embodiment, the drive bolt is a torque-controlled high-strength drive bolt.

[0010] In one embodiment, the end of the guide groove is provided with a limiting groove, and correspondingly, the corresponding end of the wedge slider is provided with a limiting boss that cooperates with it.

[0011] In one embodiment, the column node plate is provided with an elongated hole through which the drive bolt passes.

[0012] In one embodiment, at least one of the contact surfaces of the wedge slider and the guide groove, and the contact surfaces of the beam end connecting plate and the column node plate, is provided with a texture or coating to increase friction.

[0013] In one embodiment, an anti-loosening washer is provided on the nut side of the drive bolt.

[0014] In one embodiment, the column connection assembly includes two column node plates respectively disposed on opposite sides of the light steel column.

[0015] The aforementioned prefabricated connection structure for light steel beam-column joints resolves the inherent trade-off between stiffness and installation efficiency in traditional prefabricated steel structure joints through a bidirectional wedge-shaped self-locking structure. This solution not only provides a rigid joint with high stiffness and high load-bearing capacity but also achieves convenient installation and disassembly, while possessing excellent seismic adaptability and economic efficiency. Specifically: (1) In this scheme, the axial tension of the driving bolt is efficiently converted into a huge normal clamping force perpendicular to the connection interface through the wedge slider and the inclined surface of the guide groove.

[0016] (2) During installation, the beam end assembly only needs to be initially positioned by aligning it with the column node plate, and then a single (or a few) drive bolts are tightened. During the tightening process, the axial movement of the drive bolts automatically drives the wedge-shaped sliders on both sides to slide synchronously and symmetrically inward (towards the column center) and downward along the guide groove. This solution greatly simplifies the operation process.

[0017] (3) The nodes are all mechanically connected, with no residual welding stress or heat-affected zone, avoiding the hidden dangers caused by welding defects. When structural modification or repair is required, the self-locking can be released simply by loosening the drive bolts, and the beam can be easily disassembled, realizing a true "detachable prefabricated" connection, which provides convenience for the full life cycle management of the building. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a prefabricated connection structure for light steel beam-column joints in one embodiment. Figure 2 This is a structural schematic diagram of a prefabricated connection structure for light steel beam-column joints in one embodiment. Figure 3 This is a partial structural schematic diagram of a prefabricated connection structure for light steel beam-column joints in one embodiment; Figure 4 This is a partial structural schematic diagram of a prefabricated connection structure for light steel beam-column joints in one embodiment. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Please see Figures 1 to 4This utility model discloses a prefabricated connection structure for light steel beam-column joints. The prefabricated connection structure includes a column connection assembly 1 pre-installed on a light steel column and a beam connection assembly 2 disposed at the end of a light steel beam. The column connection assembly 1 includes at least one column node plate 11, with two symmetrically arranged guide grooves a inclined towards the column center. The beam connection assembly 2 includes a beam end connection plate 21, with a pair of wedge-shaped sliders 22 symmetrically arranged on both sides of the beam end connection plate 21. The wedge-shaped sliders 22 have inclined surfaces that cooperate with the guide grooves a. The prefabricated connection structure also includes at least one driving bolt 3 penetrating the beam end connection plate 21 and the column node plate 11. When the driving bolt 3 is tightened, the wedge-shaped sliders 22 slide along the guide grooves a, causing bidirectional compression and locking between the beam end connection plate 21 and the column node plate 11, thereby completing the assembly connection between the beam and the column. By driving the wedge-shaped slider 22 along the guide groove a through the drive bolt 3, the single axial tensile force is converted into a bidirectional (or multidirectional) clamping force on the connection interface, thus achieving self-locking of the node. Compared with the traditional drive bolt 3 connection or the unilateral clamping method in the background technology, this structure significantly improves the initial stiffness and load-bearing capacity of the node, and the installation process only requires tightening a small number of drive bolts 3, which greatly improves the assembly efficiency and lays the foundation for the non-welding, rapid assembly and high stiffness of this solution.

[0026] Furthermore, the wedge-shaped slider 22 and the beam end connecting plate 21 are slidably engaged through a dovetail groove b or a T-groove structure, thereby defining the connection method between the wedge-shaped slider 22 and the beam end connecting plate 21. This engagement method allows the wedge-shaped slider 22 to slide smoothly along a set direction (i.e., the direction of the guide groove a) under the drive of the drive bolt 3, while effectively preventing the wedge-shaped slider 22 from detaching from the beam end connecting plate 21 during force application, ensuring the reliability and stability of the force transmission of the self-locking mechanism.

[0027] Furthermore, on the contact surfaces of the beam end connecting plate 21 and the column node plate 11, shear keys 211 and shear grooves c with concave-convex fits are respectively provided. In addition to the frictional shear resistance provided by the preload of the driving bolt 3, direct mechanical engagement is added to resist the beam end shear force. This constitutes the second shear resistance structure of the node, which greatly improves the node's resistance to lateral displacement and overall seismic performance, and prevents slippage at the connection interface.

[0028] Furthermore, one or more sets of adjustable-thickness shims 4 are provided between the beam end connecting plate 21 and the column node plate 11. Thus, by introducing the adjustable shim sets 4, length or verticality errors that may occur during the processing and installation of the steel beams and columns can be compensated for, ensuring that the beam end connecting plate 21 can fit tightly against the column node plate 11, avoiding gaps that could affect the self-locking effect and load transfer. This improves the structure's tolerance to manufacturing and construction errors and guarantees connection quality.

[0029] Furthermore, the drive bolt 3 is a torque-controlled high-strength drive bolt 3. Therefore, by using a torque-controlled high-strength drive bolt 3, the preload of the drive bolt 3 can be precisely applied and monitored, ensuring the consistency of preload between multiple nodes, thereby guaranteeing the uniformity and reliability of the entire structural connection and meeting the requirements of modern steel structure design codes.

[0030] Furthermore, the end of the guide groove a is provided with a limiting groove d, and correspondingly, the corresponding end of the wedge slider 22 is provided with a matching limiting boss 221. This physically limits the final stroke of the wedge slider 22 during installation, preventing it from sliding out of the guide groove a or causing crush damage to related components due to over-tightening of the drive bolt 3. This provides protection and safety during installation, making construction more controllable.

[0031] Furthermore, the column node plate 11 is provided with an elongated oval hole e through which the drive bolt 3 passes. Designing the drive bolt 3 hole on the column node plate 11 as an elongated oval hole e provides the necessary adjustment margin for the initial positioning of the beam in the plane, facilitates centering and correction during on-site installation, reduces the accuracy requirements for hoisting and positioning, and further improves the construction convenience and fault tolerance of on-site assembly.

[0032] Furthermore, at least one of the contact surfaces of the wedge-shaped slider 22 and the guide groove a, and the contact surfaces of the beam end connecting plate 21 and the column node plate 11, is provided with a texture or coating to increase friction. Applying friction-enhancing measures (such as patterns, sandblasting, or special coatings) to key contact surfaces significantly improves the coefficient of friction between the contact surfaces, thereby achieving greater static friction under the same preload of the drive bolt 3. This directly enhances the node's anti-slip capability and energy dissipation capacity under loads (especially dynamic loads).

[0033] Furthermore, an anti-loosening washer 31 is provided on the nut side of the drive bolt 3. During long-term use, especially in vibration environments, ordinary drive bolts 3 may loosen. The anti-loosening washer 31 effectively prevents the nut from loosening, ensuring that the preload of the self-locking joint does not decrease during long-term use, thus guaranteeing the durability and long-term safety of the structure.

[0034] Furthermore, the column connection assembly 1 includes two column node plates 11 (not shown) respectively disposed on opposite sides of the light steel column, for realizing bidirectional connection of the beam on both sides of the column. This extends the solution to a double-sided connection node form for the column.

[0035] In summary, the prefabricated connection structure for light steel beam-column joints disclosed in this utility model solves the contradiction between stiffness and installation efficiency in traditional prefabricated steel structure joints through a bidirectional wedge-shaped self-locking structure. This solution not only provides a rigid joint with high stiffness and high load-bearing capacity, but also achieves convenient installation and disassembly, while possessing good seismic adaptability and economy. Specifically: (1) In this scheme, the axial tension of the driving bolt is efficiently converted into a huge normal clamping force perpendicular to the connection interface through the wedge slider and the inclined surface of the guide groove.

[0036] (2) During installation, the beam end assembly only needs to be initially positioned by aligning it with the column node plate, and then a single (or a few) drive bolts are tightened. During the tightening process, the axial movement of the drive bolts automatically drives the wedge-shaped sliders on both sides to slide synchronously and symmetrically inward (towards the column center) and downward along the guide groove. This solution greatly simplifies the operation process.

[0037] (3) The nodes are all mechanically connected, with no residual welding stress or heat-affected zone, avoiding the hidden dangers caused by welding defects. When structural modification or repair is required, the self-locking can be released simply by loosening the drive bolts, and the beam can be easily disassembled, realizing a true "detachable prefabricated" connection, which provides convenience for the full life cycle management of the building.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A prefabricated connection structure for light steel beam-column joints, characterized in that, include: The column connection assembly is pre-installed on the light steel column and the beam connection assembly is set at the end of the light steel beam. The column connection assembly includes at least one column node plate, and the column node plate is provided with two symmetrically arranged guide grooves that are inclined towards the column center. The beam connection assembly includes a beam end connection plate, and a pair of wedge-shaped sliders are symmetrically arranged on both sides of the beam end connection plate; The wedge-shaped slider has an inclined surface that mates with the guide groove; The light steel beam-column joint assembly connection structure also includes at least one drive bolt that passes through the beam end connection plate and the column joint plate.

2. The prefabricated connection structure for light steel beam-column joints according to claim 1, characterized in that, The wedge-shaped slider and the beam end connecting plate slide together via a dovetail groove structure.

3. The prefabricated connection structure for light steel beam-column joints according to claim 2, characterized in that, On the contact surfaces of the beam end connecting plate and the column node plate, shear keys and shear grooves with concave-convex fits are respectively provided.

4. The prefabricated connection structure for light steel beam-column joints according to claim 3, characterized in that, One or more sets of adjustable-thickness shims are also provided between the beam end connecting plate and the column node plate.

5. The prefabricated connection structure for light steel beam-column joints according to claim 4, characterized in that, The drive bolt is a torque-controlled high-strength drive bolt.

6. The prefabricated connection structure for light steel beam-column joints according to claim 5, characterized in that, The end of the guide groove is provided with a limiting groove, and correspondingly, the corresponding end of the wedge-shaped slider is provided with a limiting boss that cooperates with it.

7. The prefabricated connection structure for light steel beam-column joints according to claim 6, characterized in that, The column node plate is provided with an elongated hole through which the drive bolt passes.

8. The prefabricated connection structure for light steel beam-column joints according to claim 7, characterized in that, At least one of the contact surfaces of the wedge-shaped slider and the guide groove, and the contact surfaces of the beam end connecting plate and the column node plate, is provided with textures to increase friction.

9. The prefabricated connection structure for light steel beam-column joints according to claim 8, characterized in that, An anti-loosening washer is provided on the nut side of the drive bolt.

10. The prefabricated connection structure for light steel beam-column joints according to claim 9, characterized in that, The column connection assembly includes two column node plates respectively disposed on opposite sides of the light steel column.

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