Cross-shaped hoop head tenon joint reinforced by screws and manufacturing method of cross-shaped hoop head tenon joint

Abstract

The invention provides a screw-reinforced cross hoop head tenon joint and a manufacturing method thereof, the screw-reinforced cross hoop head tenon joint comprises a wooden column (1), one end of the wooden column is provided with a cross recess (11), the joint of a first wood square column (2) and a second wood square column (3) which are connected through a cross half tenon structure and a wood square column body adjacent to the first wood square column (2) and the second wood square column (3) are placed in a groove body of the cross recess (11), and the first wood square column (2) and the second wood square column (3) are connected through the cross half tenon structure. The wooden column (1), the first wooden square column (2) and the second wooden square column (3) are fastened and connected into a whole through a group of screws along the radial direction and the axial direction of the wooden column. The initial rigidity, the ultimate bearing capacity and the energy dissipation capacity of the joint can be remarkably improved, and brittle wood cross grain splitting damage of the joint under large rotational deformation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, in particular to the technical field of improving the seismic performance of wooden structures of ancient buildings under bidirectional earthquake action, and specifically to a cross-hoop tenon node reinforced with screws and a manufacturing method thereof. Background Art

[0002] The wooden structure of ancient buildings is a building with the excellent traditional Chinese cultural genes and profound historical heritage. It is also the carrier of the Chinese traditional wooden structure construction skills, which is the intangible cultural heritage of mankind. It has become an important link to maintain the emotions of the Chinese people and to gather the strength of China. The mortise and tenon joint is a common joint form in the wooden structure of ancient buildings.

[0003] Under bidirectional earthquakes, cross-hoop tenon joints are prone to brittle wood transverse splitting failure. This makes the bearing capacity and deformation capacity of such joints not fully utilized. In order to ensure that the joints have sufficient initial stiffness, bending bearing capacity and deformation capacity, and to delay the transverse splitting failure of the wood and the longitudinal fracture failure of the tenon, it is necessary to appropriately improve the seismic performance of the joints through technical measures. Summary of the invention

[0004] The present invention aims to overcome the above-mentioned deficiencies in the prior art and provide a screw-reinforced cross-hoop tenon node which can significantly reduce the construction cost of node reinforcement and improve construction efficiency.

[0005] The technical problem to be solved can be implemented through the following technical solutions.

[0006] A screw-reinforced cross-hoop mortise and tenon joint, characterized in that it comprises a wooden column (1), one end of which is provided with a cross groove (11), the connection between a first wooden beam (2) and a second wooden beam (3) connected by a cross-cross half-mortise structure and the adjacent wooden beam bodies are placed in the groove body of the cross groove (11), and the wooden column (1) is fastened to the first wooden beam (2) and the second wooden beam (3) by a group of screws along the radial and axial directions of the wooden column as a whole.

[0007] Further, the set of screws includes a first screw (41), a second screw (42), a third screw (43), a fourth screw (44), a fifth screw (45) and a sixth screw (46). Along the radial direction of the wooden column (1), the first screw (41) is successively drilled into the wooden column body, the first wooden beam (2) and the wooden column body; along the radial direction of the wooden column (1), the second screw (42) is successively drilled into the wooden column body, the second wooden beam (3) and the wooden column body; along the axial direction of the wooden column, the third screw (43) is successively drilled into the second wooden beam (3) and the wooden column body; along the axial direction of the wooden column, the fourth screw (44) is successively drilled into the first wooden beam (2) and the wooden column body; along the axial direction of the wooden column, the fifth screw (45) is successively drilled into the second wooden beam (3) and the wooden column body; along the axial direction of the wooden column, the sixth screw (46) is successively drilled into the first wooden beam (2) and the wooden column body. From the perspective of the axial projection view of the wooden column, the third screw (43), the fourth screw (44), the fifth screw (45) and the sixth screw (46) are respectively located in different quadrant regions of the four quadrants formed by the intersection of the first screw (41) and the second screw (42).

[0008] Preferably, the first screw (41) is screwed into the first wooden beam (2) at an angle of 45 degrees; the second screw (42) is screwed into the second wooden beam (3) at an angle of 45 degrees.

[0009] Preferably, the first screw (41) and the second screw (42) are arranged in a vertically crossed manner in space; the third screw (43), the fourth screw (44), the fifth screw (45) and the sixth screw (46) are arranged in parallel along the axial direction of the wooden column.

[0010] Further, a first groove (21) is formed on the first wooden beam (2), a second groove (31) is formed on the second wooden beam (3), and the first wooden beam (2) and the second wooden beam (3) are connected by a cross - half tenon through the first groove and the second groove.

[0011] Further, the connection position of the first wooden beam (2) and the second wooden beam (3) is located at a position near one end of the first wooden beam; the connection position of the first wooden beam (2) and the second wooden beam (3) is located at a position near one end of the second wooden beam.

[0012] Preferably, each screw in the set of screws is a self - tapping screw.

[0013] Another technical problem to be solved by the present invention is to provide a manufacturing method for the cross - hoop head tenon joint reinforced by the aforesaid screws. The method includes the following manufacturing steps:

[0014] (1), Open a cross - slot on the end face of one end of the wooden column;

[0015] (2) According to the cross-jointed half-mortise and tenon structure, the first and second wooden beams are grooved;

[0016] (3) Assembling the first wooden beam, the second wooden beam and the wooden column to form a cross-hoop tenon node;

[0017] (4) Drive screws along the radial and axial directions of the wooden columns to tighten the connections between the wooden beams and the wooden columns.

[0018] Furthermore, when the cross groove is cut in step (1), the groove widths of the groove bodies in two directions of the cross groove are respectively adapted to the widths of the first wooden beam and the second wooden beam, and the depths of the groove bodies in two directions are respectively consistent with the heights of the first wooden beam and the second wooden beam.

[0019] Furthermore, step (2) includes the steps of opening a first groove on the first wooden beam and opening a second groove on the second wooden beam; the width of the first groove is consistent with the width of the second wooden beam, and the depth of the groove is half of the height of the second wooden beam; the width of the second groove is consistent with the width of the first wooden beam, and the depth of the groove is half of the height of the first wooden beam.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention can significantly improve the initial stiffness, ultimate bearing capacity and energy dissipation capacity of the node, and avoid brittle wood transverse grain splitting damage when the node is subjected to large rotational deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A top view of a cross-hoop tenon node reinforced with screws of the present invention;

[0023] Figure 2 A front view of a cross-hoop tenon node reinforced with screws of the present invention;

[0024] Figure 3 This is a schematic diagram of the cross section of a wooden beam;

[0025] In the figure: 1, wooden column; 11, cross groove;

[0026] 2. First wooden beam; 21. First groove; 22. First section; 23. Second section; 24. Third section;

[0027] 3. The second wooden beam; 31. The second groove; 32. The fourth section; 33. The fifth section; 34. The sixth section;

[0028] 41. First screw; 42. Second screw; 43. Third screw; 44. Fourth screw; 45. Fifth screw; 46. Sixth screw. DETAILED DESCRIPTION

[0029] The following further elaborates on the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0030] The present invention provides a cross-hoop head tenon joint with screw reinforcement for the reinforcement and renovation of traditional wood structures and a manufacturing method thereof. Referring to Figures 1 to 3 , the cross-hoop head tenon joint mainly includes a wooden column 1, a first wooden beam 2, a second wooden beam 3, and a plurality of screws (self-tapping screws).

[0031] Among them, corresponding first grooves 21 and second grooves 32 are respectively formed on the first wooden beam 2 and the second wooden beam 3; the first wooden beam 2 and the second wooden beam 3 are respectively connected and fixed in a cross-shaped cross-tenon structure through the grooves formed thereon; a cross groove 11 is formed on the top end face of the wooden column 1, and the cross-crossing part of the first wooden beam 2 and the second wooden beam 3 is embedded in the cross groove 11.

[0032] Referring to Figure 3 , the first wooden beam 2 is divided into three sections according to the grooving position of the first groove 21. The wooden beam body where the groove is located (i.e., the facing position) is the first section 22, and the wooden beam bodies on both sides of the groove are the second section 23 and the third section 24, where the second section 23 is longer than the third section 24. Similarly, the second wooden beam 3 is divided into three sections according to the grooving position of the second groove 31. The wooden beam body where the groove is located (i.e., the facing position) is the fourth section 24, and the wooden beam bodies on both sides of the groove are the fifth section 33 and the sixth section 34, where the fifth section 33 is longer than the sixth section 34.

[0033] Furthermore, after the two wooden beams in the cross-tenon structure are placed in the cross groove 11, they are fastened to the wooden column 1 by a plurality of screws to strengthen the connection part. Specifically (taking the example where the first wooden beam 2 is above the second wooden beam 3 at the connection, see Figure 2 ), along the radial direction (horizontal direction) of the wooden column 1, the first screw 41 sequentially passes through the wooden column body, the first section 22 of the first wooden beam 2, and the wooden column body; along the radial direction (horizontal direction) of the wooden column 1, the second screw 42 sequentially passes through the wooden column body, the fourth section 32 of the second wooden beam 3, and the wooden column body; along the axial direction (vertical direction) of the wooden column 1, the third screw 43 sequentially passes through the sixth section 34 of the second wooden beam 3 and the wooden column body; along the axial direction (vertical direction) of the wooden column 1, the fourth screw 44 sequentially passes through the third section 24 of the first wooden beam 2 and the wooden column body; along the axial direction (vertical direction) of the wooden column 1, the fifth screw 45 sequentially passes through the fifth section 33 of the second wooden beam 3 and the wooden column body; along the axial direction (vertical direction) of the wooden column 1, the sixth screw 46 sequentially passes through the second section 23 of the first wooden beam 2 and the wooden column body. That is, from the perspective of the axial projection of the wooden column (see Figure 1 perspective), the third screw 43, the fourth screw 44, the fifth screw 45, and the sixth screw 46 are respectively located in different quadrant regions of the four quadrants formed by the first screw 41 and the second screw 42 due to the cross-crossing.

[0034] Furthermore, the connection between the wooden beam and the wooden column is fastened by the above six screws (self - tapping screws). Among them, the first screw and the second screw are arranged in a cross - shaped pattern in space, and the other four screws are arranged parallel to the axis.

[0035] The cross - hoop - head tenon joint structure reinforced by screws of the present invention is manufactured and processed according to the following method:

[0036] First, the top surface of the wooden column 1 is grooved (cross - groove 11 is opened): in the horizontal direction (see Figure 1 ), the grooving width is 1 mm larger than the cross - sectional width of the second wooden beam 3, and the grooving depth is the same as the cross - sectional height of the second wooden beam 3; in the vertical direction, the grooving width is 1 mm larger than the cross - sectional width of the first wooden beam 2, and the grooving depth is the same as the cross - sectional height of the first wooden beam 2.

[0037] Then, grooves are respectively opened at the positions where the first wooden beam 2 and the second wooden beam 3 coincide with the center of the wooden column 1 (i.e., the production of the first groove 21 and the second groove 31): the width of the groove opened on the first wooden beam 2 (i.e., the first groove 21) is the same as the cross - sectional width of the second wooden beam 3, and the grooving depth is half of the cross - sectional height of the second wooden beam 3; the width of the groove opened on the second wooden beam 3 (i.e., the second groove 31) is the same as the cross - sectional width of the first wooden beam 2, and the grooving depth is half of the cross - sectional height of the first wooden beam 2.

[0038] The first wooden beam 2 and the second wooden beam 3 are assembled with the wooden column 1 in the Figure 1 shown manner to form a cross - hoop - head tenon joint. At the positions where the top of the wooden column 1 contacts the first wooden beam 2 and the second wooden beam 3, self - tapping screw drilling points are set along the grain direction of the wooden column, and the drilling points are at 45° angles with respect to both the first wooden beam 2 and the second wooden beam 3. Self - tapping screws are driven at the two drilling points (i.e., the positioning and installation of the first screw 41 and the second screw 42).

[0039] Finally, self - tapping screw drilling points are set on the top surface of the wooden column, and the drilling points are on the center lines of the first wooden beam 2 and the second wooden beam 3. Four self - tapping screws are driven at the four drilling points (i.e., the positioning and installation of the third to sixth screws). Thus, it is ensured that the tenon and the wooden column form an integral whole.

[0040] The joint of the present invention can significantly delay the cross - grain splitting failure of the wood and the longitudinal fracture failure of the tenon in the cross - hoop - head tenon joint under the action of bidirectional earthquake, comprehensively improving the initial rotational stiffness, flexural bearing capacity, ultimate deformation capacity and energy - dissipation capacity of the joint. At the same time, the present invention can significantly reduce the construction cost of joint reinforcement and improve the construction efficiency.

[0041] The following are more specific embodiments.

[0042] Embodiment 1:

[0043] This embodiment provides a cross-tenon joint reinforced with self-tapping screws. The wooden column is a round wooden column with a diameter of 300 mm. The cross-sectional dimensions of both wooden beams are 100 mm × 150 mm, and the length is 600 mm. The diameter of the self-tapping screw is 8 mm, and the length is 300 mm.

[0044] The node assembly process is as follows: First, place the second wooden beam into the groove at the top of the wooden column, and then place the first wooden beam into the groove at the top of the wooden column. At the positions where the top of the wooden column contacts the two wooden beams, set the self-tapping screw drilling points along the grain direction of the wooden column. The included angles between the drilling points and the two wooden beams are both 45°. Drive two self-tapping screws at the two drilling points. Finally, set the self-tapping screw drilling points on the top surface of the wooden column. The drilling points are located on the center line of the two wooden beams. Drive four self-tapping screws at the four drilling points.

[0045] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A screw-reinforced cross-hoop tenon node, characterized in that: The invention comprises a wooden column (1), one end of which is provided with a cross groove (11), the connection between a first wooden beam (2) and a second wooden beam (3) connected by a cross half-mortise and tenon structure and the wooden beam bodies at adjacent positions are placed in the groove body of the cross groove (11), and the wooden column (1) is fastened to the first wooden beam (2) and the second wooden beam (3) by a group of screws along the radial and axial directions of the wooden column as a whole.

2. The screw-reinforced cross-hoop joint according to claim 1, characterized in that: The set of screws comprises a first screw (41), a second screw (42), a third screw (43), a fourth screw (44), a fifth screw (45) and a sixth screw (46), wherein along the radial direction of the wooden column (1), the first screw (41) is drilled into the wooden column body, the first wooden beam (2) and the wooden column body in sequence; along the radial direction of the wooden column (1), the second screw (42) is drilled into the wooden column body, the second wooden beam (3) and the wooden column body in sequence; along the axial direction of the wooden column, the third screw (43) is drilled into the second wooden beam (3) and the wooden column body in sequence; along the axial direction of the wooden column, the third screw (43) is drilled into the second wooden beam (3) and the wooden column body in sequence; , the fourth screw (44) is drilled into the first wooden beam (2) and the wooden column body in sequence; along the axial direction of the wooden column, the fifth screw (45) is drilled into the second wooden beam (3) and the wooden column body in sequence; along the axial direction of the wooden column, the sixth screw (46) is drilled into the first wooden beam (2) and the wooden column body in sequence; along the axial projection angle of the wooden column, the third screw (43), the fourth screw (44), the fifth screw (45) and the sixth screw (46) are respectively located in different quadrants of the four quadrants formed by the intersection of the first screw (41) and the second screw (42).

3. The screw-reinforced cross-hoop joint according to claim 2, characterized in that: The first screw (41) is screwed into the first wooden beam (2) at an angle of 45 degrees; the second screw (42) is screwed into the second wooden beam (3) at an angle of 45 degrees.

4. The screw-reinforced cross-hoop joint according to claim 2 or 3, characterized in that: The first screw (41) and the second screw (42) are arranged vertically and crosswise in space; the third screw (43), the fourth screw (44), the fifth screw (45) and the sixth screw (46) are arranged parallel to the axial direction of the wooden column.

5. The screw-reinforced cross-hoop joint according to claim 1 or 2, characterized in that: The first wooden beam (2) is provided with a first groove (21), and the second wooden beam (3) is provided with a second groove (31). The first wooden beam (2) and the second wooden beam (3) are connected by a cross-jointed half-mortise and tenon connection via the first groove and the second groove.

6. The screw-reinforced cross-hoop joint according to claim 1, characterized in that: The connection between the first wooden beam (2) and the second wooden beam (3) is located near one end of the first wooden beam; the connection between the first wooden beam (2) and the second wooden beam (3) is located near one end of the second wooden beam.

7. The screw-reinforced cross-hoop joint according to claim 1, characterized in that: Each screw in the set of screws is a self-tapping screw.

8. A method for manufacturing a screw-reinforced cross-hoop tenon node as claimed in any one of claims 1 to 7, characterized in that: The production steps include: (1) Open a cross groove on the end surface of one end of the wooden column; (2) According to the cross-jointed half-mortise and tenon structure, the first and second wooden beams are grooved; (3) Assembling the first wooden beam, the second wooden beam and the wooden column to form a cross-hoop tenon node; (4) Drive screws along the radial and axial directions of the wooden columns to tighten the connections between the wooden beams and the wooden columns.

9. The manufacturing method according to claim 8, characterized in that: When the cross groove is cut in step (1), the groove widths of the groove bodies in two directions of the cross groove are respectively adapted to the widths of the first wooden beam and the second wooden beam, and the depths of the groove bodies in two directions are respectively consistent with the heights of the first wooden beam and the second wooden beam.

10. The manufacturing method according to claim 8, characterized in that: Step (2) includes the steps of opening a first groove on the first wooden beam and opening a second groove on the second wooden beam; the width of the first groove is consistent with the width of the second wooden beam, and the depth of the groove is half of the height of the second wooden beam; the width of the second groove is consistent with the width of the first wooden beam, and the depth of the groove is half of the height of the first wooden beam.

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