Box column full bolt connection joint

Abstract

The utility model relates to the technical field of structural engineering, especially to the technical field of box column connecting joint, a box column full bolt connecting joint, including upper section column, lower section column and connecting device, its characterized in that, connecting device includes inner side connecting plate group, outer side connecting plate group and a plurality of connecting bolts, the inner side connecting plate group is assembled in the box type structure inside at the butt joint of upper section column and lower section column, and the outer side connecting plate group is assembled in the box type structure outside at the butt joint of upper section column and lower section column, the inner side connecting plate group and the outer side connecting plate group are fixed through a plurality of connecting bolts, and the column wall of upper section column is provided with operating hole for installing connecting bolt from the inside of box column.

Description

Technical Field

[0001] This utility model relates to the field of structural engineering technology, and in particular to the field of box column connection node technology. Background Technology

[0002] In the field of steel structure engineering, box-type columns are widely used in high-rise buildings and large structures due to their excellent compressive and torsional resistance. However, the jointing between box-type column segments has always been a key technology and challenge in construction. Traditional jointing methods mainly rely on on-site welding, where each box-type column segment is prefabricated in the factory, transported to the site for positioning and installation, and then welded around the joint ends. While this method can form a strong connection, it has significant limitations: on-site welding involves a large amount of work, requires highly skilled welders, and the heat generated during welding can lead to a heat-affected zone and residual welding stress, affecting material properties; at the same time, welding quality is constrained by weather conditions and on-site management, making it difficult to guarantee quality stability, and the lengthy welding and subsequent inspection processes severely restrict construction efficiency. To improve the degree of prefabrication, methods such as bolted-welded hybrid connections have been developed, but these often fail to completely eliminate the need for on-site welding.

[0003] Chinese patent document CN108678185A discloses a fully prefabricated, detachable, assembled beam-column connection node. In this technical solution, the cross-shaped I-beams inside the column and the steel skeleton of the cantilever beam segment are pre-welded together in the factory to form a rigid core area. During on-site construction, the steel skeleton of the prefabricated beam segment is first butt-welded to the steel skeleton of the cantilever beam segment at the flange and web to achieve initial force transfer. Subsequently, the key connection device comes into play: by fitting two U-shaped steel plates from the top and bottom directions onto the outside of the butt-welded I-beams, a wrap-around reinforcing sleeve is formed, and finally, the two U-shaped steel plates are fastened together with a group of high-strength bolts.

[0004] However, the above-mentioned device has the following shortcomings: when connecting the cantilever beam segment of the precast steel-concrete column to the precast steel-concrete beam segment, on-site welding is still required at the flange and web of the steel. This leads to reliance on welding operations during construction, which not only introduces quality problems such as deformation and residual stress in the welding heat-affected zone, but also prolongs the construction period and increases the reliance on the welding skills, which is contrary to the concept of green construction. Utility Model Content

[0005] To overcome the shortcomings of the prior art, a box-type column fully bolted connection node is provided.

[0006] This utility model is achieved through the following technical solution: a box-type column fully bolted connection node, including an upper column, a lower column, and a connecting device; characterized in that the connecting device includes an inner connecting plate assembly, an outer connecting plate assembly, and multiple connecting bolts; the inner connecting plate assembly is assembled inside the box-type structure at the joint between the upper and lower columns, and the outer connecting plate assembly is assembled outside the box-type structure at the joint between the upper and lower columns; the inner connecting plate assembly and the outer connecting plate assembly are fixed by multiple connecting bolts; the upper column has an operating hole on its column wall for installing connecting bolts from inside the box-type column.

[0007] In this technical solution, the connecting device consists entirely of an inner connecting plate assembly, an outer connecting plate assembly, and high-strength connecting bolts. The upper and lower column sections are clamped together by the tightening force of the bolts. This change directly eliminates the welding operation itself, thereby avoiding quality problems such as heat-affected zones, component deformation, and residual stress caused by welding. At the same time, it no longer relies on highly skilled welders, significantly improving the stability and reliability of construction quality.

[0008] Since the connection process only involves inserting and tightening bolts, the construction process is greatly simplified and is no longer constrained by welding procedures, weather conditions, and weld inspection cycles. This significantly shortens the construction cycle, improves assembly efficiency, and perfectly meets the requirements of energy saving, time saving, and reduced environmental impact in green construction.

[0009] In a preferred embodiment of this utility model, the inner connecting plate assembly includes four inner connecting plates, which are respectively arranged on the four inner walls of the box column; the outer connecting plate assembly includes four outer connecting plates, which are respectively arranged on the four outer walls of the box column.

[0010] In a preferred embodiment of this utility model, the upper column, lower column, inner connecting plate and outer connecting plate are all provided with multiple bolt holes for connecting bolts to pass through.

[0011] In a preferred embodiment of this utility model, the operating hole is a circular hole, the size of which is configured to allow a human hand to pass through, so that the operator can reach in with their arm to complete the insertion and initial positioning of the connecting bolts inside the box column.

[0012] In a preferred embodiment of this utility model, multiple operating holes are provided and distributed on different columns of the upper column to facilitate the internal assembly of the connecting bolts of the four side walls.

[0013] In a preferred embodiment of this utility model, multiple connecting bolts are arranged in a regular array and together form a closed force flow path that transmits force from the inner connecting plate group, through the mating wall plates of the upper and lower columns, to the outer connecting plate group.

[0014] In a preferred embodiment of this utility model, positioning lines are provided on both the inner connecting plate and the outer connecting plate.

[0015] In a preferred embodiment of this utility model, the inner connecting plate and the outer connecting plate are provided with mounting ears for temporary fixation to the column wall.

[0016] In a preferred embodiment of this utility model, a guide slope is provided at the opening of the bolt hole.

[0017] In a preferred embodiment of this utility model, a sealing plate is installed on the operating hole. After the connecting device is assembled, the sealing plate is used to seal the upper column wall.

[0018] As a preferred embodiment of this utility model Compared with the prior art, the present invention has the following beneficial effects: A fully bolted connection node for box-type columns achieves fully prefabricated construction of the box-type column node by setting up connecting plates on both the inner and outer sides and using a fully bolted connection method, completely avoiding on-site welding operations. This not only significantly improves construction efficiency and shortens the construction period, but also eliminates the adverse effects of the welding heat-affected zone on the node performance, ensuring the stability and reliability of the connection quality.

[0019] Furthermore, by specifically defining the inner and outer connecting plate groups as four independent plates, each corresponding to one of the four walls of the box column, uniform and symmetrical force transmission is ensured in all directions of the column. This arrangement greatly improves the integrity and stability of the joint, enabling it to effectively resist loads from any direction.

[0020] Furthermore, by pre-setting bolt holes on each component and employing integrated high-precision machining, precise alignment of all bolt holes was achieved. This greatly simplifies the alignment process during on-site installation, avoids damage caused by on-site hole enlargement or forced bolt insertion, and ensures consistency between construction quality and design performance.

[0021] Furthermore, limiting the operating hole to a circular hole suitable for human hand passage provides the necessary working space for operators to install bolts inside the box column, making internal bolt tightening operations, which were originally difficult to perform in a confined space, feasible and convenient, and is a key guarantee for achieving full bolt connection.

[0022] Furthermore, by setting multiple operating holes distributed on different column walls, operators can approach and assemble all four side wall connecting bolts from the optimal angle, avoiding installation blind spots caused by the limitation of a single operating hole position, thereby comprehensively improving the convenience and efficiency of internal bolt assembly.

[0023] Furthermore, the regularly arranged bolt group together with the inner and outer connecting plates constitutes an efficient force transmission system, which can smoothly and continuously transmit the complex internal forces borne by the node, significantly improving the stiffness and load-bearing capacity of the node, and ensuring the integrity and safety of the connection node in the working state.

[0024] Furthermore, positioning lines are set on the connecting plate, providing a clear and intuitive alignment benchmark for on-site installation. This allows workers to quickly and accurately place the connecting plate in the designed position, significantly reducing measurement and adjustment time and improving the accuracy and speed of initial positioning.

[0025] Furthermore, the mounting ear plate, especially the internal connecting plate, provides a temporary fixing fulcrum, solving the problem of displacement or detachment due to its own weight or slight impact before final tightening. This ensures the stability and safety of the installation process and makes the construction process smoother.

[0026] Furthermore, by setting a guide ramp at the bolt hole opening, the bolt shank can be guided to slide smoothly into the hole, effectively preventing the bolt threads from colliding or scratching the edge of the hole wall. This protects the threads and reduces installation resistance, thereby improving the efficiency and success rate of bolt assembly.

[0027] Furthermore, sealing plates are used to seal the operating holes after installation, restoring the integrity of the box-shaped column wall, preventing external corrosive media such as moisture and air from entering the column and corroding the steel frame, ensuring the long-term durability of the structure, and maintaining the clean appearance of the building.

[0028] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a front view of the structure of a box-type column all-bolted connection node according to this utility model; Figure 2 This is a schematic diagram of the connecting device of this utility model; Figure 3 This is a schematic diagram of the structural installation of a box-type column all-bolted connection node according to the present invention; Figure 4 This is a schematic diagram of the positioning line of this utility model; Figure 5 This is a schematic diagram of the mounting ear plate of this utility model; The annotations in the attached figures are explained as follows: Upper column 1, lower column 2, connecting device 3, operating hole 4, positioning line 5, mounting ear plate 6, inner connecting plate assembly 31, outer connecting plate assembly 32, connecting bolt 33, inner connecting plate 311, outer connecting plate 321, bolt hole 331. Detailed Implementation

[0030] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0031] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” are used only to facilitate the description of the embodiments and simplify 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.

[0032] like Figures 1 to 5 As shown, a box-type column fully bolted connection node includes an upper column 1, a lower column 2, and a connecting device 3; wherein, the connecting device 3 includes an inner connecting plate group 31, an outer connecting plate group 32, and a plurality of high-strength connecting bolts 33.

[0033] In one specific embodiment, each component undergoes precision pretreatment before assembly. The mating surfaces of the upper column 1 and the lower column 2 must be flat. The inner connecting plate assembly 31 consists of four independent inner connecting plates 311, and the outer connecting plate assembly 32 consists of four independent outer connecting plates 321. All bolt holes 331 on the connecting plates and the upper and lower column panels are precision machined using an integrated die-cutting process to ensure absolute alignment of the holes. Guide bevels are machined at the openings of the bolt holes 331 to facilitate bolt insertion.

[0034] During on-site assembly, the upper column 1 is first hoisted and aligned with the lower column 2. Then, operators extend their arms and tools through multiple circular operating holes 4 on the upper column 1 wall. These operating holes 4 are distributed across different column walls, ensuring comprehensive coverage of all four side wall connection areas. Operators insert high-strength connecting bolts 33 from inside the box-type column, sequentially passing them through the corresponding bolt holes 331 on the inner connecting plate 311, the column wall, and the outer connecting plate 321. Outside the box-type column, another group of workers uses specialized tools to tighten all the high-strength connecting bolts 33 to the designed torque. These regularly arranged bolt groups, together with the inner and outer connecting plates, form a closed force flow path from the inner connecting plate group 31, through the upper and lower column mating walls, and finally to the outer connecting plate group 32, thus efficiently transmitting bending moment, shear force, and axial force, forming a reliable rigid connection.

[0035] As a further optimization of this embodiment, positioning lines 5 can be provided on the surfaces of the inner connecting plate 311 and the outer connecting plate 321. These positioning lines 5 serve as a clearly visible reference, quickly guiding workers to align the connecting plates with the designed positions at the column ends during the initial installation phase, significantly improving the accuracy and efficiency of initial positioning and reducing subsequent adjustment time.

[0036] In another preferred embodiment, to better address the temporary fixing issue of the internal connecting plate, mounting lugs 6 can be provided on the inner connecting plate 311 and the outer connecting plate 321. Before the high-strength connecting bolts 33 are formally inserted, the connecting plate can be initially fixed to the column wall using temporary bolts or locating pins via the mounting lugs 6. This measure effectively prevents the connecting plate from shifting or falling off due to its own weight or slight impact before final tightening, especially ensuring the stability of the internal connecting plate during hoisting and alignment, making the entire installation process safer and smoother.

[0037] After the node assembly is completed, all operating holes 4 are sealed with special sealing plates to restore the integrity of the box-type column wall and its anti-corrosion and fireproof performance. The entire construction process completely eliminates on-site welding, and only bolts are used for connection. This not only significantly improves construction efficiency and quality control, but also gives the node excellent disassembly and recovery functions, perfectly meeting the requirements of green construction and full life cycle management of modern prefabricated buildings.

[0038] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A box-type column all-bolted connection node, comprising an upper column section (1), a lower column section (2), and a connecting device (3); characterized in that, The connecting device (3) includes an inner connecting plate assembly (31), an outer connecting plate assembly (32), and multiple connecting bolts (33); the inner connecting plate assembly (31) is assembled inside the box-shaped structure at the joint between the upper column (1) and the lower column (2), and the outer connecting plate assembly (32) is assembled outside the box-shaped structure at the joint between the upper column (1) and the lower column (2); the inner connecting plate assembly (31) and the outer connecting plate assembly (32) are fixed by the multiple connecting bolts (33); the upper column (1) has an operating hole (4) on its column wall for installing the connecting bolts (33) from inside the box-shaped column.

2. The all-bolted connection node for a box-type column according to claim 1, characterized in that, The inner connecting plate group (31) includes four inner connecting plates (311), which are respectively arranged on the four inner walls of the box column; the outer connecting plate group (32) includes four outer connecting plates (321), which are respectively arranged on the four outer walls of the box column.

3. The all-bolted connection node for a box-type column according to claim 1, characterized in that, The upper column (1), lower column (2), inner connecting plate (311) and outer connecting plate (321) are each provided with multiple bolt holes (331) for connecting bolts (33) to pass through.

4. The all-bolted connection node for a box-type column according to claim 1, characterized in that, The operating hole (4) is a circular hole, the size of which is designed to allow a hand to pass through, so that the operator can insert his arm to complete the insertion and initial positioning of the connecting bolts (33) inside the box column.

5. A box-type column all-bolted connection node according to claim 1, characterized in that, The operating holes (4) are provided in multiple locations and are distributed on different columns of the upper column (1) to facilitate the assembly of the connecting bolts (33) of the four side walls from the inside.

6. A box-type column all-bolted connection node according to claim 1, characterized in that, The multiple connecting bolts (33) are arranged in a regular array and together form a closed force flow path from the inner connecting plate group (31), through the mating wall plates of the upper column (1) and the lower column (2), to the outer connecting plate group (32).

7. A box-type column all-bolted connection node according to claim 2, characterized in that, Positioning lines (5) are provided on both the inner connecting plate (311) and the outer connecting plate (321).

8. A box-type column all-bolted connection node according to claim 2, characterized in that, The inner connecting plate (311) and the outer connecting plate (321) are provided with mounting lugs (6) for temporary fixation to the column wall.

9. A box-type column all-bolted connection node according to claim 3, characterized in that, The bolt hole (331) is provided with a guide slope at the opening.

10. A box-type column all-bolted connection node according to claim 1, characterized in that, A sealing plate is installed on the operating hole (4), and the sealing plate is used to seal the column wall of the upper column (1) after the connecting device (3) is assembled.

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