A prestressed mortise and tenon joint structure for steel pipe columns

Abstract

The embodiment of the present invention discloses a prestressed mortise and tenon joint structure for steel pipe columns, which relates to the technical field of steel pipe column connection and can realize the connection of steel pipe columns. The mortise and tenon joint structure includes an upper prefabricated column and a lower prefabricated column; a connection cavity is provided in one end of the upper prefabricated column; a docking portion is provided on the outer side of the connection cavity on the upper prefabricated column; a tenon is provided at one end of the lower prefabricated column; a connection portion is provided on the side of the tenon on the lower prefabricated column; the lower prefabricated column can be tightly connected to the upper prefabricated column and the lower prefabricated column through the mutual extrusion between the side of the tenon and the side of the stiffening rib of the connection portion under the joint action of the prestressed steel strand and the deadweight of the upper structure; the solution provided by the present invention is that after the upper prefabricated column and the lower prefabricated column are spliced, the upper prefabricated column and the lower prefabricated column are connected together using a prestressed connector, and the mortise and tenon are made to fit and press together by prestress, which further ensures the connection reliability at the steel pipe column node, improves the stress performance, avoids a large amount of welding work, and is convenient for construction and installation.

Description

Technical Field

[0001] The invention relates to a prestressed mortise and tenon joint structure of a steel pipe column, in particular to a prestressed mortise and tenon joint structure of a steel pipe column. Background Art

[0002] Prefabricated steel structures are a typical structural connection method in prefabricated buildings. They offer advantages such as high strength, low mass, excellent seismic resistance and energy dissipation, and standardized design. Steel components can be prefabricated and welded in the factory, allowing for rapid on-site installation with minimal wet work, thus meeting green energy conservation goals. The development of prefabricated steel buildings also helps reduce construction pollution, conserve resources, and improve labor efficiency. Joints, as the most critical component of prefabricated steel structures, connect and secure the entire structure. They should be safe and reliable, transmit force clearly, be well-designed, be durable, and be easy to install, install, and test.

[0003] Existing prefabricated steel nodes are mainly designed for beam-column nodes, and lack a weld-free splicing design between steel columns. Most prefabricated steel nodes are welded. During welding operations, various welding defects are prone to occur in the welds and heat-affected zones, which not only have a certain impact on the overall bearing capacity of the structure, but also cause certain environmental pollution. In addition, the nodes need to be inspected for flaws, which affects the cost and construction period of the project. Summary of the Invention

[0004] In view of this, an embodiment of the present invention provides a prestressed mortise and tenon joint structure of a steel pipe column, which can solve the connection problem of existing steel pipe columns.

[0005] In the first aspect, an embodiment of the present invention provides a prestressed mortise and tenon joint structure of a steel pipe column, wherein the mortise and tenon joint structure includes an upper prefabricated column and a lower prefabricated column; a connecting cavity is provided in one end of the upper prefabricated column; a docking portion is provided on the outer side of the connecting cavity on the upper prefabricated column; a tenon is provided at one end of the lower prefabricated column; a connecting portion is provided on the side of the tenon on the lower prefabricated column; the lower prefabricated column can be inserted into the connecting cavity through the tenon, and the connecting portion and the docking portion are docked together through prestress and the self-weight of the structure; the connecting portion and the docking portion are connected together through a connecting piece.

[0006] According to a specific implementation method of an embodiment of the present invention, the docking part is a corbel structure with a through hole provided on the corbel structure; the connecting part is a connecting angle steel with a connecting hole provided on the connecting angle steel; the connecting piece can pass through the through hole and the connecting hole, thereby connecting the corbel structure and the connecting angle steel together.

[0007] According to a specific implementation of the embodiment of the present invention, the I-beam of the bracket structure is welded and fixed to the side wall of the upper prefabricated column; and the connecting angle steel is welded and fixed to the side wall of the lower prefabricated column.

[0008] According to a specific implementation of an embodiment of the present invention, the connecting parts are prestressed anchor rods or prestressed steel strands. All prestressed anchor rods or prestressed steel strands should be in a tensile state under the action of seismic loads, and the mortise and tenon joints should maintain a tight fit.

[0009] According to a specific implementation of an embodiment of the present invention, the upper prefabricated column and the lower prefabricated column are respectively rectangular structures; the corbel structures are respectively welded and fixed on the four side walls of the upper prefabricated column; and the connecting angle steels are respectively welded and fixed on the four side walls of the lower prefabricated column.

[0010] According to a specific implementation method of an embodiment of the present invention, the tenon is a step tenon, and the trapezoidal tenon contains two horizontal and vertical stiffening ribs. The connecting cavity is a rectangular structure, and stiffening ribs are also provided on the inner wall of the connecting cavity. The step tenon can be pressed into the connecting cavity and clamped on the side wall of the connecting cavity with the stiffening ribs.

[0011] According to a specific implementation method of an embodiment of the present invention, the stiffening ribs are triangular stiffening ribs, which are welded or cast on each side wall in the connecting cavity; when the step tenon is crimped into the connecting cavity, the triangular stiffening ribs can be crimped together with the side walls of the step tenon, thereby clamping the step tenon in the connecting cavity; two groups of horizontal and vertical stiffening ribs are provided on the inner wall of the tenon.

[0012] According to a specific implementation method of an embodiment of the present invention, an upper partition is provided in the connecting cavity, and a lower partition is provided in the lower prefabricated column; when the tenon is inserted in the connecting cavity, there is still a certain distance between it and the upper partition to provide a certain extrusion space for the application of prestress; the center line of the upper flange plate of the I-beam and the center line of the upper partition are located on the same plane, the thickness of the upper partition is not less than the thickness of the upper flange plate of the I-beam, and the connecting surface of the connecting angle steel and the lower partition are located on the same plane.

[0013] According to a specific implementation method of an embodiment of the present invention, the mortise and tenon splicing structure also includes a prefabricated beam, one end of the prefabricated beam is fixedly connected to one side of the corbel structure through a splicing plate and bolts; one end of the splicing plate is located at one end of the prefabricated beam, and is fixedly connected to the prefabricated beam by passing bolts through the splicing plate and the prefabricated beam; the other end of the splicing plate is located at one end of the corbel structure, and is fixedly connected to the corbel structure by passing bolts through the splicing plate and the corbel structure.

[0014] According to a specific implementation of the embodiment of the present invention, the splicing plates are respectively connected to the upper flanges of the precast beam and the corbel structure, and the splicing plates are respectively connected to the side surfaces of the precast beam and the corbel structure.

[0015] According to the solution provided by the present invention, after the upper prefabricated column and the lower prefabricated column are spliced, the corbel structure of the upper prefabricated column and the connecting angle steel of the lower prefabricated column are connected together using prestressed steel strands or prestressed anchor rods. The prestressed steel strands and the deadweight of the structure enable the column to be tightly installed, thereby further ensuring the connection reliability at the steel pipe column node and improving the stress-bearing performance. The solution provided by the present invention avoids a large amount of welding work and is convenient for construction and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A three-dimensional diagram of a prestressed mortise and tenon joint structure of a steel pipe column according to an embodiment of the present invention;

[0018] Figure 2 This is a front view of a prestressed mortise and tenon joint structure of a steel pipe column according to an embodiment of the present invention;

[0019] Figure 3 This is an exploded view of a prestressed mortise and tenon joint structure of a steel pipe column according to an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of a component of a prestressed mortise and tenon joint structure of a steel pipe column according to an embodiment of the present invention;

[0021] Figure 5 A cross-sectional view of a prestressed mortise and tenon joint structure of a steel pipe column according to an embodiment of the present invention;

[0022] Figure 6 A cross-sectional view of a tenon end according to an embodiment of the present invention;

[0023] In the figure: 1-upper precast column; 2-lower precast column; 3-precast beam; 4-prestressed anchor rod; 5-connecting angle steel; 6-corbel structure; 7-splicing plate; 8-tenon; 9-triangular stiffening rib; 10-nut; 11-upper partition; 12-lower partition; 13-bolt; 14-connecting cavity; 15-tenon inner stiffening plate. DETAILED DESCRIPTION

[0024] The following describes embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0025] like Figures 1 to 5 As shown, this embodiment provides a steel pipe column prestressed mortise and tenon splicing structure, specifically an assembled welding-free prestressed steel pipe column mortise and tenon splicing structure; specifically, the mortise and tenon splicing structure includes an upper prefabricated column 1 and a lower prefabricated column 2, and the upper prefabricated column 1 and the lower prefabricated column 2 are respectively rectangular structures, wherein the upper prefabricated column 1 is a mortise end, and the lower prefabricated column 2 is a tenon end; further, a connecting cavity 14 is provided in one end of the upper prefabricated column 1; a docking portion is provided on the outer side of the connecting cavity 14 on the upper prefabricated column 1; a tenon 8 is provided at one end of the lower prefabricated column 2; a connecting portion is provided on the side of the tenon 8 on the lower prefabricated column 2; specifically, the lower The prefabricated column 2 can be inserted into the connecting cavity 14 through the tenon 8, and the connecting part and the docking part are docked together by prestress and the dead weight of the structure to form a mortise and tenon connection structure; further, the connecting part and the docking part are connected together by a connecting piece, and the connecting piece is used to connect the docking part of the upper column of the upper prefabricated column 1 and the connecting part of the lower prefabricated column 2, and the upper prefabricated column 1 and the lower prefabricated column 2 are pressed tightly by prestress. This mortise and tenon splicing structure can not only effectively solve the problem of difficulty in further reducing the amount of on-site welding work in the project, but also further significantly improve the construction and stress performance of the prefabricated steel structure nodes.

[0026] Preferably, in combination with the above scheme, Figures 1 to 5 As shown, the docking portion is a corbel structure 6, which is provided with a through hole; further, the connecting portion is a connecting angle steel 5, which is provided with a connecting hole; this design allows the connecting piece to pass through the through hole of the corbel structure 6 and the connecting hole of the connecting angle steel 5, thereby connecting the corbel structure 6 and the connecting angle steel 5 together, and then fixing the upper prefabricated column 1 and the lower prefabricated column 2 together.

[0027] Preferably, in combination with the above scheme, Figures 1 to 5 As shown, the I-beam of the corbel structure 6 has an I-shaped cross-section; specifically, the corbel structure 6 is welded and fixed to the side wall of the upper prefabricated column 1, and its through holes are opened on the upper and lower flanges along the vertical direction; further, the connecting angle steel 5 is welded and fixed to the side wall of the lower prefabricated column 2, and its connecting hole is opened on the upper flange.

[0028] Preferably, in combination with the above scheme, Figures 1 to 5 As shown, the connecting parts are prestressed anchor rods 4 or prestressed steel strands; specifically, the prestressed anchor rods 4 are used for connection, and the prestressed anchor rods 4 pass through the through holes of the corbel structure 6 and the connecting holes of the connecting angle steel 5 respectively, and are locked by nuts 10, so that they are tightly installed by prestressing; the prestressed steel strands are used for connection, and the prestressed steel strands pass through the through holes of the corbel structure 6 and the connecting holes of the connecting angle steel 5 respectively, and are locked by locking sleeves, so that they can also be tightly installed.

[0029] Preferably, in combination with the above scheme, Figures 1 to 5As shown, the upper prefabricated column 1 and the lower prefabricated column 2 are respectively rectangular structures; the corbel structures 6 are symmetrically welded and fixed on the four side walls of the upper prefabricated column 1; further, the connecting angle steels 5 are symmetrically welded and fixed on the four side walls of the lower prefabricated column 2.

[0030] Preferably, in combination with the above scheme, Figures 1 to 5 As shown, the tenon 8 is a step tenon, and contains two stiffening plates 15 in the horizontal and vertical directions. The connecting cavity 14 is a rectangular structure, and stiffening ribs are also provided on the inner wall of the connecting cavity 14. The step tenon can be pressed into the connecting cavity 14 and clamped on the side wall of the connecting cavity 14 with the stiffening ribs.

[0031] Preferably, in combination with the above scheme, Figures 1 to 5 As shown, the stiffening ribs are triangular stiffening ribs 9, which are welded or cast on the side walls of the connecting cavity 14. When the platform tenon is pressed into the connecting cavity 14, the triangular stiffening ribs 9 can be pressed together with the side walls of the platform tenon, so that the platform tenon is clamped in the connecting cavity 14. A tenon inner stiffening plate 15 is provided in the platform tenon to avoid instability.

[0032] Preferably, in combination with the above scheme, Figures 1 to 5 As shown, an upper partition 11 is provided in the connecting cavity 14, and a lower partition 12 is provided in the lower precast column 2; specifically, when the tenon 8 is inserted into the connecting cavity 14, there is still a gap between the top of the tenon and the upper partition 11, which provides a certain space for the action of prestressing; further, the center line of the upper flange plate of the I-beam and the center line of the upper partition 11 are located on the same plane, that is, an upper partition 11 is provided at the upper flange position of the corresponding precast beam 3 in the connecting cavity 14, together constituting a mortise end; further, the thickness of the upper partition 11 should not be less than the thickness of the upper flange plate of the I-beam, the connecting surface of the connecting angle steel 5 and the lower partition 12 are located on the same plane, a step tenon is welded on the lower partition 12, the lower partition 12 is welded to the upper end of the lower precast column 2, and the top surface of the lower partition 12 and the top surface of the angle steel 5 are on the same horizontal plane, together constituting a tenon end.

[0033] Preferably, in combination with the above scheme, Figures 1 to 5 As shown, the mortise and tenon joint structure also includes a prefabricated beam 3, one end of the prefabricated beam 3 is fixedly connected to one side of the corbel structure 6 through a splicing plate 7 and a bolt 13, one end of the splicing plate 7 is located at one end of the prefabricated beam 3, and is fixedly connected to the prefabricated beam 3 by passing through the splicing plate 7 through the bolt 13; the other end of the splicing plate 7 is located at one end of the corbel structure 6, and is fixedly connected to the corbel structure 6 by passing through the splicing plate 7 through the bolt 13.

[0034] Preferably, in combination with the above scheme, Figures 1 to 5As shown, the splicing plate 7 is respectively connected to the upper flanges of the precast beam 3 and the corbel structure 6, and the splicing plate 7 is respectively connected to the side surfaces of the precast beam 3 and the corbel structure 6; specifically, the upper flange at one end of the precast beam 3 and the upper flange at one end of the corbel structure 6 are respectively symmetrically designed with four bolt holes, and the two ends are respectively fixedly connected together in the vertical direction by four high-strength bolts; further, the side surface at one end of the precast beam 3 and the surface at one end of the corbel structure 6 are respectively symmetrically designed with eight bolt holes, and the two ends are respectively fixedly connected together in the horizontal direction by eight high-strength bolts, thereby realizing a tight connection between the beam and the column.

[0035] According to the solution provided by the present invention, after the upper prefabricated column 1 and the lower prefabricated column 2 are spliced, the corbel structure of the upper prefabricated column 1 and the connecting angle steel of the lower prefabricated column 2 are connected together using prestressed steel strands or prestressed anchor rods. The prestressing allows them to be tightly installed, further ensuring the connection reliability at the steel pipe column node and improving the stress performance. The solution provided by the present invention avoids a large amount of welding work by optimizing the design of the steel pipe column node connection method, and is convenient for construction and installation.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0037] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0038] In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A prestressed mortise and tenon joint structure of a steel pipe column, characterized in that: The mortise and tenon joint structure comprises an upper prefabricated column (1) and a lower prefabricated column (2); a connecting cavity (14) is provided in one end of the upper prefabricated column (1); a docking portion is provided on the outer side of the connecting cavity (14) on the upper prefabricated column (1); a tenon (8) is provided at one end of the lower prefabricated column (2); a connecting portion is provided on the side of the tenon (8) on the lower prefabricated column (2); the lower prefabricated column (2) can be inserted into the connecting cavity (14) through the tenon (8), and the connecting portion and the docking portion are docked together by prestress and the deadweight of the structure; the connecting portion and the docking portion are connected together by a connecting piece; the docking portion The connecting portion is a corbel structure (6), and a through hole is provided on the corbel structure (6); the connecting portion is a connecting angle steel (5), and a connecting hole is provided on the connecting angle steel (5); the connecting piece can pass through the through hole and the connecting hole, thereby connecting the corbel structure (6) and the connecting angle steel (5) together; the tenon (8) is a step tenon, and the inner wall of the tenon (8) is provided with two groups of horizontal and vertical stiffening ribs, and the connecting cavity (14) is a rectangular parallelepiped structure, and the inner wall of the connecting cavity (14) is also provided with stiffening ribs; the step tenon can be pressed into the connecting cavity (14) and clamped with the stiffening ribs on the side wall of the connecting cavity (14).

2. The prestressed mortise and tenon joint structure of steel pipe columns according to claim 1 is characterized in that: The I-beam of the bracket structure (6); the bracket structure (6) is welded and fixed to the side wall of the upper prefabricated column (1); and the connecting angle steel (5) is welded and fixed to the side wall of the lower prefabricated column (2).

3. The prestressed mortise and tenon joint structure of steel pipe columns according to claim 1, characterized in that: The connecting piece is a prestressed anchor rod (4) or a prestressed steel strand.

4. The prestressed mortise and tenon joint structure of steel pipe columns according to claim 2, characterized in that: The upper prefabricated column (1) and the lower prefabricated column (2) are respectively rectangular parallelepiped structures; the bracket structures (6) are respectively welded and fixed on the four side walls of the upper prefabricated column (1); and the connecting angle steels (5) are respectively welded and fixed on the four side walls of the lower prefabricated column (2).

5. The prestressed mortise and tenon joint structure of steel pipe columns according to claim 1, characterized in that: The stiffening ribs are triangular stiffening ribs (9), and the triangular stiffening ribs (9) are welded or cast on the side walls of the connecting cavity (14); when the step tenon is pressed into the connecting cavity (14), the triangular stiffening ribs (9) can be pressed together with the side walls of the step tenon, so that the step tenon is clamped in the connecting cavity (14); and an inner stiffening plate (15) is provided in the step tenon.

6. The prestressed mortise and tenon joint structure of steel pipe columns according to claim 2, characterized in that: An upper partition (11) is provided in the connecting cavity (14), and a lower partition (12) is provided in the lower prefabricated column (2); the midline of the upper flange plate of the I-beam and the midline of the upper partition (11) are located on the same plane, the thickness of the upper partition (11) is not less than the thickness of the upper flange plate of the I-beam, and the connection surface of the connecting angle steel (5) and the lower partition (12) are located on the same plane.

7. The prestressed mortise and tenon joint structure of steel pipe columns according to claim 2, characterized in that: The mortise and tenon joint structure further comprises a prefabricated beam (3), one end of the prefabricated beam (3) and one side of the corbel structure (6) being fixedly connected together via a splicing plate (7) and a bolt (13); one end of the splicing plate (7) is located at one end of the prefabricated beam (3), and is fixedly connected to the prefabricated beam (3) by passing through the splicing plate (7) via the bolt (13); the other end of the splicing plate (7) is located at one end of the corbel structure (6), and is fixedly connected to the corbel structure (6) via passing through the splicing plate (7) via the bolt (13).

8. The prestressed mortise and tenon joint structure of steel pipe columns according to claim 7, characterized in that: The splicing plates (7) are respectively connected to the upper flanges of the prefabricated beam (3) and the corbel structure (6), and the splicing plates (7) are respectively connected to the side surfaces of the prefabricated beam (3) and the corbel structure (6).

Images