A mortise and tenon steel connector and modular timber structure node

Abstract

The present application relates to the field of wood building construction, and discloses a mortise and tenon steel connecting piece and a modular wood structure node for the modular wood structure node, the mortise and tenon steel connecting piece being used for connecting a rectangular wood column and a rectangular wood beam of the modular wood structure node, two adjacent surfaces of the rectangular wood column being provided with column tenon grooves, and one surface of the rectangular wood beam being provided with a beam tenon groove, the mortise and tenon steel connecting piece comprising a rectangular steel plate, a column-embedded steel component, a channel steel and a beam-embedded steel component. The rectangular steel plate is provided with a first threaded hole, the column-embedded steel component is fixedly connected to one end of the rectangular steel plate in a perpendicular manner, the column-embedded steel component is embedded into the column tenon groove, the wing plate of the channel steel is fixedly connected to the other end of the rectangular steel plate in a perpendicular manner, the first threaded hole is arranged in the area of the rectangular steel plate covered by the channel steel, the beam-embedded steel component is fixedly connected to the web of the channel steel, and the beam-embedded steel component is located on the side away from the rectangular steel plate, and the outer contour of the beam-embedded steel component is adapted to the inner contour of the beam tenon groove, so that the beam-embedded steel component is embedded into the beam tenon groove.

Description

Technical Field

[0001] This invention relates to the field of timber construction, and in particular to a mortise and tenon steel connector for modular timber structure joints and modular timber structure joints. Background Technology

[0002] In the field of timber construction, existing technologies often employ nested steel components within timber structural joints. To achieve rapid construction, engineering practice commonly involves drilling numerous holes in the timber structure and directly connecting the steel components to the timber structure using bolts. However, this construction method has significant drawbacks: as a natural organic material, timber's internal fiber structure exhibits anisotropic characteristics. Extensive drilling severely disrupts the continuity and integrity of the timber fibers, leading to a significant reduction in the timber's mechanical properties, such as shear strength along the grain and compressive strength across the grain. For beam-column structural systems primarily composed of timber, drilling weakens the structural strength. While the steel components can achieve stable connections, the overall load-bearing capacity of the timber structure is significantly reduced. Under long-term loads or sudden external forces such as earthquakes, there is a potential risk of structural failure, posing a threat to building safety.

[0003] Therefore, new structures are needed for timber construction to reduce damage to the mechanical properties of the wood itself. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to reduce the damage to the mechanical properties of wood itself.

[0005] To address the aforementioned technical problems, this invention provides a mortise and tenon steel connector for modular wood structure nodes and a modular wood structure node.

[0006] In a first aspect, the present invention provides a mortise and tenon steel connector for modular timber structure nodes. The mortise and tenon steel connector is used to connect rectangular timber columns and rectangular timber beams of the modular timber structure nodes. Two adjacent sides of the rectangular timber column have column tenons, and one side of the rectangular timber beam has a beam tenon. The mortise and tenon steel connector includes: a rectangular steel plate with a first threaded hole for bolting to an adjacent modular timber structure node; a column-embedded steel member, which is perpendicularly fixed to one end of the rectangular steel plate, and the outer contour of the column-embedded steel member matches the inner contour of the column tenon, allowing the column-embedded steel member to be embedded in the column tenon; a channel steel, whose flange is perpendicularly fixed to the other end of the rectangular steel plate, and the first threaded hole is located in the area of ​​the rectangular steel plate covered by the channel steel; and a beam-embedded steel member, which is fixedly connected to the web of the channel steel, and the beam-embedded steel member is located on the side away from the rectangular steel plate, and the outer contour of the beam-embedded steel member matches the inner contour of the beam tenon, allowing the beam-embedded steel member to be embedded in the beam tenon.

[0007] In one embodiment, adjacent mortise and tenon steel connectors are fixedly connected by an adapter frame. The wing plate of the channel steel is provided with a second threaded hole, and adjacent mortise and tenon steel connectors are respectively bolted to the adapter frame through the second threaded hole.

[0008] In one embodiment, the embedded steel member is welded to the lower or upper edge of the rectangular steel plate.

[0009] In a second aspect, the present invention provides a modular timber structure node, comprising: a rectangular timber column, wherein two adjacent sides of the rectangular timber column are provided with column tenons; a rectangular timber beam, wherein one side of the rectangular timber beam is provided with a beam tenon; and a mortise and tenon steel connector provided in the first aspect of the present invention, wherein the column-embedded steel component of the mortise and tenon steel connector is embedded in the column tenon, and the beam-embedded steel component of the mortise and tenon steel connector is embedded in the beam tenon.

[0010] In one embodiment, adjacent mortise and tenon steel connectors are fixedly connected by an adapter frame, which is a double-channel steel connector. The double-channel steel connector includes two welded and fixed right-angled channels. A third threaded hole is provided on any one of the right-angled channels. Adjacent mortise and tenon steel connectors are respectively bolted to the third threaded hole of the right-angled channel through the second threaded hole.

[0011] In one embodiment, stiffening ribs are provided between the two right-angled channel steels.

[0012] In one embodiment, structural adhesive is injected into the interior of the column tenon or beam tenon.

[0013] In one embodiment, the inner contour of the column tenon is I-shaped, U-shaped, or U-shaped, the length of the embedded steel member is equal to the depth of the column tenon, and the depth of the column tenon is equal to half the side length of the rectangular wooden column.

[0014] In one embodiment, the cross-sectional shape of the beam tenon is rectangular, and the height direction of the beam tenon is perpendicular to the grain direction of the rectangular wooden beam. The height of the beam tenon is between one-half and two-thirds of the height of the rectangular wooden beam.

[0015] In one embodiment, the contact area between the rectangular wooden column and the mortise and tenon steel connector is wrapped with carbon fiber cloth; the contact area between the rectangular wooden beam and the mortise and tenon steel connector is wrapped with carbon fiber cloth.

[0016] The mortise and tenon steel connector for modular timber structure nodes and the modular timber structure nodes of this invention have the following advantages compared with the prior art:

[0017] The mortise and tenon steel connector of this invention connects to wooden columns and beams by embedding the column steel component into the column tenon groove and the beam steel component into the beam tenon groove, avoiding extensive drilling into the wooden structure. This connection method preserves the original structure of the wood to the greatest extent, reduces damage to the continuity and integrity of the wood fibers, thereby minimizing the weakening of the wood structure's own strength and allowing the wood structure to better exert its mechanical properties. Simultaneously, the rectangular steel plate, column steel component, channel steel, and beam steel component of the mortise and tenon steel connector cooperate to form a relatively stable connection structure. The matching of the column steel component with the column tenon groove and the beam steel component with the beam tenon groove achieves a good mortise and tenon joint. Furthermore, the connection is further enhanced by bolting to adjacent modular wooden structure nodes through the first threaded hole on the rectangular steel plate. This dual connection method allows for more even load distribution at the nodes under stress, reducing safety hazards caused by unstable connections. Therefore, the mortise and tenon steel connector of this invention can reduce damage to the mechanical properties of the wood while ensuring structural strength. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a mortise and tenon steel connector, as exemplarily shown in an embodiment of the present invention.

[0019] Figure 2 This is an exploded view of the assembly of a mortise and tenon steel connector, as exemplarily shown in an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram illustrating the assembly of a mortise and tenon steel connector, as exemplarily shown in an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram illustrating the assembly of an adapter frame, as exemplarily shown in an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of an adapter frame, as exemplarily shown in an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram illustrating the position of a column steel member in a mortise and tenon steel connector, as exemplarily shown in an embodiment of the present invention.

[0024] Figure 7 This is an exploded view of a modular wood structure node, as exemplarily shown in an embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram illustrating the assembly process of a modular wooden structure node, as exemplarily shown in an embodiment of the present invention.

[0026] Figure label:

[0027] 1. Modular timber structure node; 10. Mortise and tenon steel connector; 11. Rectangular timber column; 12. Rectangular timber beam; 13. Adapter frame; 101. Rectangular steel plate; 102. Column-embedded steel component; 103. Channel steel; 104. Beam-embedded steel component; 111. Column tenon groove; 121. Beam tenon groove; 131. Right-angle channel steel; 1011. First threaded hole; 1031. Wing plate; 1032. Web plate; 1033. Second threaded hole; 1311. Third threaded hole. Detailed Implementation

[0028] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0029] In the description of this invention, it should be understood that the terms "first," "second," "third," etc., are used to distinguish similar objects and are not intended to describe specific structures. It should be understood that such terms are interchangeable where appropriate so that embodiments of the invention can be implemented in structures other than those illustrated or described. Furthermore, "comprising," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a product or device comprising a series of components or units is not limited to those explicitly listed, but may also include other components or units not explicitly listed but inherent to these products or devices. Descriptions of shape such as "rectangle," "right angle," etc., in this invention are for ease of understanding the necessary structures required by the invention. Appropriate modifications can be made to these shapes while satisfying the implementation schemes of the embodiments of the invention, and the resulting schemes also fall within the protection scope of this invention.

[0030] Modular timber structure buildings have gradually become a hot topic in the engineering and academic communities due to their advantages such as high construction efficiency, excellent quality, green and environmentally friendly materials, and livability. Their significant feature is that all interior decoration is completed in the factory by prefabricating the box-type modular units, and they can be quickly delivered for use after the modules are connected on the construction site.

[0031] However, the inventors discovered that while this construction method provides convenience, it lacks corresponding wooden structure nodes, has poor modular functionality in existing wooden structures, and requires extensive drilling operations on the wooden structure, which severely damages the continuity and integrity of the wood fibers, resulting in a significant reduction in the mechanical properties of the wood, such as shear resistance along the grain and compressive strength across the grain.

[0032] To solve this problem, such as Figure 1As shown, the present invention provides a mortise and tenon steel connector 10 for a modular wood structure node 1. The mortise and tenon steel connector 10 is used to connect the rectangular wooden column 11 and the rectangular wooden beam 12 of the modular wood structure node 1. The two adjacent sides of the rectangular wooden column 11 are provided with column tenon grooves 111, and one side of the rectangular wooden beam 12 is provided with beam tenon groove 121. The mortise and tenon steel connector 10 may include: a rectangular steel plate 101, a column-embedded steel component 102, a channel steel 103, and a beam-embedded steel component 104.

[0033] The rectangular steel plate 101 has a first threaded hole 1011, which is used to bolt to the adjacent modular wood structure node 1. The embedded column steel member 102 is vertically fixed to one end of the rectangular steel plate 101, and the outer contour of the embedded column steel member 102 is adapted to the inner contour of the column tenon 111, so that the embedded column steel member 102 is embedded in the column tenon 111. The flange 1031 of the channel steel 103 is vertically fixed to the other end of the rectangular steel plate 101. The first threaded hole 1011 is opened in the area of ​​the rectangular steel plate 101 covered by the channel steel 103. The embedded beam steel member 104 is fixedly connected to the web 1032 of the channel steel 103, and the embedded beam steel member 104 is located on the side away from the rectangular steel plate 101. The outer contour of the embedded beam steel member 104 is adapted to the inner contour of the beam tenon 121, so that the embedded beam steel member 104 is embedded in the beam tenon 121.

[0034] Through the above scheme, combined with Figure 2 , Figure 3 and Figure 4 It can be seen that, since the rectangular wooden column 11 has tenon grooves 111 on two adjacent sides, each of the two adjacent mortise and tenon steel connectors 10 can insert its own embedded steel component 102 into the corresponding tenon groove 111. The tenon groove 111 can restrict the movement of the mortise and tenon steel connector 10 along the side of the rectangular wooden column 11. On this basis, the two adjacent mortise and tenon steel connectors 10 are fixedly connected by a transition frame 13. When one mortise and tenon steel connector 10 wants to come out of the tenon groove 111, the transition frame 13 pulls the other mortise and tenon steel connector 10 into the corresponding tenon groove 111. The two mortise and tenon steel connectors 10 restrain each other to form a stable assembly. At the same time, the transition frame 13 can clamp the rectangular wooden beam 12, and the cooperation of the embedded beam steel component 104 and the beam tenon groove 121 forms a limit for the rectangular wooden beam 12.

[0035] Since the column tenon 111 and beam tenon 121 do not require penetrating the wood and are limited in number, it is possible to reduce the damage to the mechanical properties of the wood itself while forming a modular wood structure node 1.

[0036] It is understood that in this invention, ordinary steel plate can be used as the adapter frame 13, and the part that fits with the tenon steel connector 10 can be assembled by drilling and threading or by direct welding.

[0037] In one embodiment, adjacent mortise and tenon steel connectors 10 are fixedly connected by an adapter frame 13. The wing plate 1031 of the channel steel 103 is provided with a second threaded hole 1033. Adjacent mortise and tenon steel connectors 10 are bolted to the adapter frame 13 through the second threaded hole 1033.

[0038] To achieve a more robust assembly, in one embodiment of the present invention, such as Figure 4 and Figure 5 As shown, the adapter 13 is a double channel steel connector. The double channel steel connector may include two welded and fixed right-angle channel steels 131. A third threaded hole 1311 is provided on any one of the right-angle channel steels 131. Adjacent tenon steel connectors 10 are bolted to the third threaded hole 1311 of the right-angle channel steel 131 through the second threaded hole 1033.

[0039] Since the double-channel steel connector is welded from two mutually perpendicular right-angled channel steels 131, when the double-channel steel connector is assembled in the modular wood structure node 1, the bottom of the two right-angled channel steels 131 will respectively abut against the corresponding rectangular wood beams 12, and the abutting surfaces will be opposite to the surfaces with the beam tenon grooves 121. This forms an assembly relationship in which the rectangular wood beams 12 are located within the right-angled channel steels 131, and the tenon steel connectors 10 seal the right-angled channel steels 131. Combined with the mating structure of the embedded beam steel component 104 and the beam tenon groove 121 in this invention, the adapter frame 13 and the embedded beam steel component 104 can prevent the rectangular wood beams 12 from moving in any direction, greatly improving the assembly stability of the rectangular wood beams 12 in the modular wood structure node 1.

[0040] In this invention, the embedded steel member 102 can be fixed at any position, such as... Figure 1 As exemplarily shown, the embedded steel member 102 is fixed in the middle position of the rectangular steel plate 101 in the height direction, which only requires the creation of a post tenon 111 of corresponding shape and position on the rectangular wooden post 11. The distance between the middle of the post tenon 111 and the top of the rectangular wooden post 11 is approximately half the height of the rectangular steel plate 101.

[0041] However, in order to further reduce damage to the rectangular wooden post 11, in one embodiment of the present invention, as follows: Figure 6 and Figure 7 As shown, the embedded steel member 102 can be welded to the lower edge or the upper edge of the rectangular steel plate 101.

[0042] like Figure 6 As shown, the embedded steel member 102A is used to exemplarily represent the form in which the embedded steel member 102 is welded to the lower edge of the rectangular steel plate 101, and the embedded steel member 102B is used to exemplarily represent the form in which the embedded steel member 102 is welded to the lower edge of the rectangular steel plate 101. When assembled onto the rectangular wooden post 11, as... Figure 7As shown in the figure, in order to align the corresponding column tenon grooves 111, the inserted column steel member 102B is rotated 180 degrees. At this time, the distance between the middle parts of the column tenon grooves 111 corresponding to the inserted column steel member 102A and the inserted column steel member 102B and the top of the rectangular wooden column 11 is much greater than half of the height of the rectangular steel plate 101.

[0043] Since the column tenon groove 111 is farther from the edge (i.e., the top of the rectangular wooden column 11), the structural strength is higher, and the negative impact on the strength of the rectangular wooden column 11 is lower.

[0044] It can be understood that in this application, the appropriate column tenon grooves 111 and beam tenon grooves 121 can be selected according to the shapes and sizes of the rectangular wooden column 11 and the rectangular wooden beam 12.

[0045] In the preferred embodiment, as shown in the drawings of this application, since the column tenon grooves 111 on the rectangular wooden column 11 not only provide an anchoring effect for the transfer rack 13 in the horizontal direction, but also need to bear the gravity of the transfer rack 13 and the rectangular wooden beam 12 in the vertical direction, the column tenon grooves 111 can be set in a C shape in the middle to increase the limiting effect and bearing effect in multiple directions.

[0046] Moreover, in this application, since the rectangular wooden beam 12 is surrounded by the transfer rack 13 and the mortise-tenon steel connecting piece 10, the beam tenon groove 121 only needs to play a positioning role in the vertical direction, and the vertical bearing is realized by the transfer rack 13 and the mortise-tenon steel connecting piece 10. Therefore, the beam tenon groove 121 can be set as a vertical straight shape to minimize the size of the opening as much as possible under the condition of meeting the use requirements, and further reduce the damage to the original structure of the rectangular wooden beam 12.

[0047] On the basis of any of the above-mentioned embodiment solutions, correspondingly, on the other hand, the present invention provides a modular wooden structure node 1, which may include: a rectangular wooden column 11, with column tenon grooves 111 opened on two adjacent surfaces of the rectangular wooden column 11; a rectangular wooden beam 12, with a beam tenon groove 121 opened on one surface of the rectangular wooden beam 12; the mortise-tenon steel connecting piece 10 provided in the first aspect of the present invention, the inserted column steel member 102 of the mortise-tenon steel connecting piece 10 is embedded in the column tenon groove 111, and the inserted beam steel member 104 of the mortise-tenon steel connecting piece 10 is embedded in the beam tenon groove 121.

[0048] In the above solution, the nesting of the inserted column steel member 102 and the column tenon groove 111 forms a lateral constraint, and the cooperation of the inserted beam steel member 104 and the beam tenon groove 121 provides a longitudinal constraint. The rigid frame formed by the rectangular steel plate 101 and the channel steel 103 distributes the load to a larger area and reduces the local stress of the wood.

[0049] In one embodiment, adjacent mortise and tenon steel connectors 10 are fixedly connected by an adapter frame 13. The adapter frame 13 is a double-channel steel connector, which may include two welded and fixed right-angle channel steels 131. Each right-angle channel steel 131 has a third threaded hole 1311. Adjacent mortise and tenon steel connectors 10 are respectively bolted to the third threaded hole 1311 of the right-angle channel steel 131 through the second threaded hole 1033.

[0050] The combined section of the double-channel steel 103 provides a larger moment of inertia (e.g., the moment of inertia of the double-channel steel 103 is about 1.5 times higher than that of the single-channel steel 103), effectively resisting bending and torsional loads and reducing node deformation. In the design of the double-channel steel 103, when the double-channel steel connector is assembled in the modular wood structure node 1, the bottom of the two right-angled channel steels 131 will respectively abut against the corresponding rectangular wood beams 12, and the abutting surfaces are opposite to the surfaces with the beam tenons 121, forming an assembly relationship in which the rectangular wood beams 12 are located within the right-angled channel steels 131, and the tenon steel connectors 10 seal the right-angled channel steels 131. Combined with the mating structure of the embedded beam steel member 104 and the beam tenon 121 in this invention, the transition frame 13 and the embedded beam steel member 104 can prevent the rectangular wood beams 12 from moving in any direction, greatly improving the assembly stability of the rectangular wood beams 12 in the modular wood structure node 1.

[0051] Furthermore, stiffening ribs can be provided between the two right-angled channel steels 131. The stiffening ribs divide the web 1032 of the channel steel 103 into smaller plate areas, increasing the critical buckling stress of the web 1032. Simultaneously, the support of the stiffening ribs prevents stress concentration around welds or bolt holes, reducing the risk of fatigue cracking.

[0052] Furthermore, to further enhance structural strength, in one embodiment, structural adhesive is injected into the interior of the column tenon 111 or the beam tenon 121.

[0053] Structural adhesive creates a continuous force transmission path between steel and wood, increasing the stiffness of the joint and filling tiny gaps caused by processing tolerances, ensuring full contact between steel components and wood, and improving joint reliability.

[0054] Understandably, the use of structural adhesive depends on the actual project requirements. In some embodiments, to facilitate the reuse of modular wood structure node 1, the modular wood structure node 1 is usually designed as a detachable structure, in which case the use of structural adhesive and other materials should be avoided.

[0055] In one embodiment of this application, the inner contour of the column tenon groove 111 is I-shaped, U-shaped, or U-shaped, the length of the embedded steel member 102 is equal to the depth of the column tenon groove 111, and the depth of the column tenon groove 111 is equal to half the side length of the rectangular wooden column 11.

[0056] The I-shaped or U-shaped profile increases the mating area between the steel components and the wood, significantly improving the tensile strength of the joint. The mortise and tenon depth is controlled at 1 / 2 of the side length of the wooden column, which ensures the connection strength while avoiding excessive weakening of the wooden column cross-section.

[0057] In one embodiment, the cross-sectional shape of the beam tenon 121 is rectangular, and the height direction of the beam tenon 121 is perpendicular to the grain direction of the rectangular wooden beam 12. The height of the beam tenon 121 is between one-half and two-thirds of the height of the rectangular wooden beam 12.

[0058] The mortise and tenon joints are arranged perpendicular to the grain direction, taking advantage of the high compressive strength of wood across the grain to prevent shear damage along the grain. The height of the mortise and tenon joints is controlled within a reasonable range to ensure the embedding depth of the steel components while preserving sufficient wood cross-section to bear the load.

[0059] In one embodiment, the contact area between the rectangular wooden column 11 and the mortise and tenon steel connector 10 is wrapped with carbon fiber cloth; the contact area between the rectangular wooden beam 12 and the mortise and tenon steel connector 10 is wrapped with carbon fiber cloth.

[0060] The high elastic modulus of carbon fiber cloth can constrain the expansion and contraction of wood due to moisture and reduce the loosening of joints caused by changes in environmental humidity. Furthermore, the carbon fiber cloth works together with steel components to form a composite reinforcement system, which can further enhance the load-bearing capacity of the joints.

[0061] like Figure 8 As shown, an exemplary assembly process for a modular timber structure node 1 is presented. Steps 1-3 illustrate the assembly process of the mortise and tenon steel connector 10, step 4 illustrates the assembly process of the rectangular timber beam 12, and steps 7-12 detail the exemplary process of reusing the modular timber structure node 1 to ultimately form a large timber structure.

[0062] In this application, since the modular wood structure node 1 includes all the technical features of the mortise and tenon steel connector 10, any embodiment of the mortise and tenon steel connector 10 and its beneficial effects are applicable to the modular wood structure node 1 in this application, and the comparison will not be repeated one by one.

[0063] The mortise and tenon steel connector 10 for modular timber structure node 1 in this embodiment of the invention and the modular timber structure node 1 have the following advantages compared with the prior art:

[0064] The mortise and tenon steel connector 10 of this invention connects to wooden columns and beams by embedding the column steel member 102 into the column tenon groove 111 and the beam steel member 104 into the beam tenon groove 121, avoiding the need for extensive drilling in the wooden structure. This connection method preserves the original structure of the wood to the greatest extent, reduces damage to the continuity and integrity of the wood fibers, thereby minimizing the weakening of the wooden structure's own strength and allowing the wooden structure to better exert its mechanical properties. Simultaneously, the rectangular steel plate 101, the column steel member 102, the channel steel 103, and the beam steel member 104 of the mortise and tenon steel connector 10 cooperate to form a relatively stable connection structure. The column steel member 102 fits into the column tenon groove 111, and the beam steel member 104 fits into the beam tenon groove 121, achieving a good mortise and tenon joint. Furthermore, the connection is further enhanced by bolting to the adjacent modular wooden structure node 1 through the first threaded hole 1011 on the rectangular steel plate 101. This dual connection method allows for a more even distribution of loads at the nodes under stress, reducing safety hazards caused by unstable connections. Therefore, the mortise and tenon steel connector 10 in this invention can reduce damage to the mechanical properties of the wood while ensuring structural strength.

[0065] Through the embedded design of regular rectangular mortise and tenon joints and mortise and tenon steel connectors 10, combined with double-channel steel connectors, structural adhesive injection, and carbon fiber cloth wrapping, efficient connection and performance optimization of modular wood structure node 1 are achieved. Specifically, the regular rectangular mortise and tenon joints (such as I-shaped, U-shaped, or rectangular mortise and tenon joints 111 for columns and rectangular mortise and tenon joints 121 for beams) on the wooden columns and beams form a precise fit with the embedded column steel members 102 and embedded beam steel members 104 in the mortise and tenon steel connectors 10. This embedded design avoids the damage to the wood structure caused by traditional drilling, while increasing the contact area between steel and wood, making the load transfer more uniform. The double-channel steel connector consists of two welded and fixed right-angle channel steels 131, which are reliably connected to adjacent mortise and tenon steel connectors 10 by bolts. The stiffening ribs inside further enhance the local stability of the node and effectively resist bending and torsional loads. The structural adhesive injected into the mortise and tenon joints fills the tiny gaps between the steel and wood, enhances the interface adhesion, forms a continuous force transmission path, and significantly improves the overall stiffness of the node. In addition, the carbon fiber cloth wrapped around the contact area between the wooden components and the steel connectors utilizes its high elastic modulus to constrain the expansion and contraction of the wood due to moisture, inhibit crack propagation, and significantly improve the crack resistance and durability of the joints.

[0066] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A mortise and tenon steel connector for modular timber structure joints, characterized in that, The mortise and tenon steel connector (10) is used to connect the rectangular wooden column (11) and the rectangular wooden beam (12) of the modular wooden structure node (1). The rectangular wooden column (11) has column tenons (111) on two adjacent sides, and the rectangular wooden beam (12) has a beam tenon (121) on one side. The mortise and tenon steel connector (10) includes: A rectangular steel plate (101) is provided with a first threaded hole (1011), which is used to bolt to the adjacent modular wood structure node (1). A steel member (102) is embedded in a column. The steel member (102) is vertically fixed to one end of the rectangular steel plate (101), and the outer contour of the steel member (102) is adapted to the inner contour of the tenon groove (111), so that the steel member (102) is embedded in the tenon groove (111). Channel steel (103), the flange (1031) of the channel steel (103) is vertically fixedly connected to the other end of the rectangular steel plate (101), and the first threaded hole (1011) is opened in the area of ​​the rectangular steel plate (101) covered by the channel steel (103); A steel member (104) is fixedly connected to the web (1032) of the channel steel (103), and the steel member (104) is located on the side away from the rectangular steel plate (101). The outer contour of the steel member (104) is adapted to the inner contour of the beam tenon (121), so that the steel member (104) is embedded in the beam tenon (121).

2. The mortise and tenon steel connector according to claim 1, characterized in that, The adjacent tenon steel connectors (10) are fixedly connected by a transition frame (13). The wing plate (1031) of the channel steel (103) is provided with a second threaded hole (1033). The adjacent tenon steel connectors (10) are respectively bolted to the transition frame (13) through the second threaded hole (1033).

3. The mortise and tenon steel connector according to claim 1, characterized in that, The embedded steel member (102) is welded to the lower edge or the upper edge of the rectangular steel plate (101).

4. A modular timber structure joint, characterized in that, The modular timber structure node (1) includes: A rectangular wooden post (11) has tenon grooves (111) on two adjacent sides; A rectangular wooden beam (12), one side of which is provided with a beam tenon (121); The mortise and tenon steel connector (10) as described in any one of claims 1-3, wherein the column-embedded steel member (102) of the mortise and tenon steel connector (10) is embedded in the column tenon groove (111), and the beam-embedded steel member (104) of the mortise and tenon steel connector (10) is embedded in the beam tenon groove (121).

5. The modular timber structure node according to claim 4, characterized in that, The adjacent tenon steel connectors (10) are fixedly connected by an adapter (13), which is a double channel steel connector. The double channel steel connector includes two welded and fixed right-angle channel steels (131). A third threaded hole (1311) is provided on any one of the right-angle channel steels (131). The adjacent tenon steel connectors (10) are respectively bolted to the third threaded hole (1311) of the right-angle channel steel (131) through the second threaded hole (1033).

6. The modular timber structure node according to claim 5, characterized in that, A stiffening rib is provided between the two right-angle channel steels (131).

7. The modular timber structure node according to claim 4, characterized in that, The interior of the column tenon (111) or the beam tenon (121) is filled with structural adhesive.

8. The modular timber structure node according to claim 4, characterized in that, The inner contour of the column tenon groove (111) is I-shaped, U-shaped or U-shaped, the length of the embedded steel member (102) is equal to the depth of the column tenon groove (111), and the depth of the column tenon groove (111) is equal to half the side length of the rectangular wooden column (11).

9. The modular timber structure node according to claim 4, characterized in that, The cross-sectional shape of the beam tenon (121) is rectangular, and the height direction of the beam tenon (121) is perpendicular to the grain direction of the rectangular wooden beam (12). The height of the beam tenon (121) is between one-half and two-thirds of the height of the rectangular wooden beam (12).

10. The modular timber structure node according to claim 4, characterized in that, The contact area between the rectangular wooden column (11) and the mortise and tenon steel connector (10) is wrapped with carbon fiber cloth; the contact area between the rectangular wooden beam (12) and the mortise and tenon steel connector (10) is wrapped with carbon fiber cloth.

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