Mortise and tenon steel connecting piece and modularized wood structure joint

Abstract

The invention relates to the field of wood building construction, and discloses a mortise and tenon steel connecting piece for a modular wood structure joint and the modular wood structure joint, the mortise and tenon steel connecting piece is used for connecting a rectangular wood column and a rectangular wood beam of the modular wood structure joint, and column mortises are formed in the two adjacent faces of the rectangular wood column; a beam mortise and tenon groove is formed in one face of the rectangular wood beam. The mortise and tenon steel connecting piece can comprise a rectangular steel plate, a column-embedded steel component, channel steel and a beam-embedded steel component. A first threaded hole is formed in the rectangular steel plate, the embedded column steel member is perpendicularly and fixedly connected with one end of the rectangular steel plate and embedded into the column mortise, a wing plate of the channel steel is perpendicularly and fixedly connected with the other end of the rectangular steel plate, the first threaded hole is formed in the area, covered by the channel steel, of the rectangular steel plate, and the embedded beam steel member is fixedly connected with a web of the channel steel. The beam-embedded steel member is located on the side away from the rectangular steel plate, and the outline of the beam-embedded steel member is matched with the inner outline of the beam mortise, so that the beam-embedded steel member is embedded into the beam mortise.

Description

Technical Field

[0001] The present invention relates to the field of wooden building construction, and particularly to a mortise and tenon steel connector for modular wooden structure joints and a modular wooden structure joint. Background Art

[0002] In the field of wooden building construction, the prior art often adopts a wooden structure joint structure with steel members nested. To achieve rapid construction, in engineering practice, a large number of holes are generally drilled in the wooden structure, and the steel members are directly connected to the wooden structure through bolts. However, this construction method has significant defects: Wood, as a natural organic material, has an anisotropic internal fiber structure. Drilling a large number of holes in the wooden structure will seriously damage 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 bearing capacity across the grain. For a beam-column structure system mainly composed of a wooden structure, drilling holes weakens its own structural strength, making the steel members able to achieve stable connection, but the mechanical properties of the wooden structure in the overall structure decrease significantly. There is a potential risk of structural failure under long-term load or sudden external forces such as earthquakes, posing a hidden danger to building safety. [[ID=⑨]]

[0003] Therefore, a new structure for wooden building construction is needed to reduce the damage to the mechanical properties of the wood itself. Summary of the Invention

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

[0005] To solve the above technical problem, the present invention provides a mortise and tenon steel connector for modular wooden structure joints and a modular wooden structure joint.

[0006] In the first aspect of the present invention, a mortise and tenon steel connector for modular wooden structure joints is provided. The mortise and tenon steel connector is used to connect a rectangular wooden column and a rectangular wooden beam of a modular wooden structure joint. Two adjacent faces of the rectangular wooden column are provided with column mortise grooves, and one face of the rectangular wooden beam is provided with a beam mortise groove. The mortise and tenon steel connector includes: a rectangular steel plate, the rectangular steel plate is provided with a first threaded hole for bolt connection with an adjacent modular wooden structure joint; an embedded column steel member, the embedded column steel member is perpendicularly and fixedly connected to one end of the rectangular steel plate, and the outer contour of the embedded column steel member is adapted to the inner contour of the column mortise groove, so that the embedded column steel member is embedded in the column mortise groove; a channel steel, the web of the channel steel is perpendicularly and fixedly connected to the other end of the rectangular steel plate, and the first threaded hole is opened in the area of the rectangular steel plate covered by the channel steel; an embedded beam steel member, the embedded beam steel member is fixedly connected to the web of the channel steel, and the embedded beam steel member is located on the side away from the rectangular steel plate, and the outer contour of the embedded beam steel member is adapted to the inner contour of the beam mortise groove, so that the embedded beam steel member is embedded in the beam mortise groove.

[0007] In one embodiment, adjacent mortise and tenon steel connectors are fixedly connected through an adapter frame. Second threaded holes are formed in the flange plates of the channel steel, and the adjacent mortise and tenon steel connectors are bolted to the adapter frame through the second threaded holes respectively.

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

[0009] In the second aspect of the present invention, a modular wooden structure joint is provided. The modular wooden structure joint includes: a rectangular wooden column, with column mortise grooves formed on two adjacent faces of the rectangular wooden column; a rectangular wooden beam, with a beam mortise groove formed on one of the faces of the rectangular wooden beam; the mortise and tenon steel connector provided in the first aspect of the present invention, the stud steel member of the mortise and tenon steel connector is embedded in the column mortise groove, and the beam steel member of the mortise and tenon steel connector is embedded in the beam mortise groove.

[0010] In one embodiment, adjacent mortise and tenon steel connectors are fixedly connected through an adapter frame. The adapter frame is a double-channel steel connector, which includes two right-angle channel steels welded and fixed. Third threaded holes are formed in any one of the right-angle channel steels, and the adjacent mortise and tenon steel connectors are bolted to the third threaded holes of the right-angle channel steel through the second threaded holes respectively.

[0011] In one embodiment, a stiffening rib is provided between the two right-angle channel steels.

[0012] In one embodiment, structural adhesive is poured into the column mortise groove or the beam mortise groove.

[0013] In one embodiment, the inner contour of the column mortise groove is in the shape of an I-shaped, a return-shaped or a U-shaped. The length of the stud steel member is equal to the depth of the column mortise groove, and the depth of the column mortise groove is equal to half of the side length of the rectangular wooden column.

[0014] In one embodiment, the cross-sectional shape of the beam mortise groove is rectangular, and the height direction of the beam mortise groove is perpendicular to the grain direction of the rectangular wooden beam. The height of the beam mortise groove 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] Compared with the prior art, the beneficial effects of the mortise and tenon steel connector and the modular wooden structure joint for the modular wooden structure joint in the embodiments of the present invention are as follows:

[0017] The mortise and tenon steel connectors of the present invention connect to wooden columns and beams by embedding column-embedded steel components into column mortises and beam-embedded steel components into beam mortises, eliminating the need for extensive drilling in the timber structure. This connection method maximizes the preservation of the original timber structure, minimizing damage to the continuity and integrity of the timber fibers, thereby reducing the inherent strength loss of the timber structure and enabling it to better utilize its mechanical properties. Furthermore, the rectangular steel plates, column-embedded steel components, channel steel, and beam-embedded steel components of the mortise and tenon steel connectors work together to form a relatively stable connection. The column-embedded steel components fit into the column mortise and tenon grooves, and the beam-embedded steel components fit into the beam mortise and tenon grooves, achieving a secure mortise and tenon joint. Bolts are then connected to adjacent modular timber structure nodes through the first threaded holes in the rectangular steel plates, further enhancing the stability of the connection. This dual connection method allows for more even load transfer between nodes when subjected to stress, reducing safety hazards associated with unstable connections. This demonstrates that the mortise and tenon steel connectors of the present invention minimize damage to the timber's inherent mechanical properties while maintaining structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a mortise and tenon steel connection piece exemplarily shown in an embodiment of the present invention.

[0019] Figure 2 The figure is an exploded schematic diagram showing the assembly of a mortise and tenon steel connector according to an embodiment of the present invention.

[0020] Figure 3 It is a schematic diagram of the assembly of a mortise and tenon steel connector according to an embodiment of the present invention.

[0021] Figure 4 The figure is a schematic diagram of assembling an adapter frame according to an embodiment of the present invention.

[0022] Figure 5 It is a schematic structural diagram of an adapter frame exemplarily shown in an embodiment of the present invention.

[0023] Figure 6 The figure is a schematic diagram showing the position of a column-embedded steel component of a mortise and tenon steel connector according to an embodiment of the present invention.

[0024] Figure 7 FIG1 is an exploded schematic diagram of a modular timber structure node structure exemplarily shown in an embodiment of the present invention.

[0025] Figure 8 The figure is a schematic diagram of an assembly process of a modular wood structure node exemplarily shown in an embodiment of the present invention.

[0026] Reference numerals:

[0027] 1. Modular wood structure joint, 10. Mortise and tenon steel connector, 11. Rectangular wooden column, 12. Rectangular wooden beam, 13. Adapter frame, 101. Rectangular steel plate, 102. Steel member embedded in column, 103. Channel steel, 104. Steel member embedded in beam, 111. Column mortise groove, 121. Beam mortise 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 manners

[0028] The following combines the accompanying drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "first", "second", "third", etc. adopted in the present invention are intended to distinguish similar objects and are not used to describe a specific structure. It should be understood that under appropriate circumstances, such terms can be interchanged so that the embodiments of the present invention can be implemented in a structure other than those illustrated or described. In addition, "including", "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a product or device including a series of components or units does not necessarily have to be limited to those components or units clearly listed, but may also include other components or units inherent to these products or devices that are not clearly listed. The descriptions of shapes such as "rectangular" and "right angle" in the present invention are necessary structures adopted for facilitating the understanding of the present invention. On the basis of meeting the solutions of the embodiments of the present invention, these shapes can be appropriately changed, and the obtained solutions also fall within the protection scope of the present invention.

[0030] Modular wood structure buildings have gradually become a hot topic of concern in the engineering and academic fields due to their advantages such as high construction efficiency, excellent quality, green environmental protection of materials, and livability. Their significant feature is that all internal decorations of the box-type module units are prefabricated in the factory, and after the module connections are completed at the construction site, they can be quickly delivered for use.

[0031] However, the inventor found that although this construction method provides construction convenience, there is a lack of corresponding wood structure joints. The existing wood structure modular functions are poor, and a large number of drilling operations need to be carried out on the wood structure, which will seriously damage the continuity and integrity of the wood fibers, resulting in a significant reduction in mechanical properties such as the shear strength along the grain and the bearing capacity across the grain of the wood.

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

[0033] The rectangular steel plate 101 is provided with a first threaded hole 1011 for bolt connection with an adjacent modular wooden structure node 1. The column-inserting steel member 102 is perpendicularly and fixedly connected to one end of the rectangular steel plate 101, and the outer contour of the column-inserting steel member 102 is adapted to the inner contour of the mortise groove 111, so that the column-inserting steel member 102 is inserted into the mortise groove 111. The wing plate 1031 of the channel steel 103 is perpendicularly and fixedly connected to the other end of the rectangular steel plate 101. The first threaded hole 1011 is provided in the area of the rectangular steel plate 101 covered by the channel steel 103. The beam-inserting steel member 104 is fixedly connected to the web 1032 of the channel steel 103, and the beam-inserting steel member 104 is located on the side away from the rectangular steel plate 101. The outer contour of the beam-inserting steel member 104 is adapted to the inner contour of the beam mortise groove 121, so that the beam-inserting steel member 104 is inserted into the beam mortise groove 121.

[0034] Through the above solution, combined with Figure 2 , Figure 3 and Figure 4 it can be known that since mortise grooves 111 are provided on two adjacent side faces of the rectangular wooden column 11, both adjacent mortise and tenon steel connectors 10 can insert their own column-inserting steel members 102 into the corresponding mortise grooves 111, and the mortise grooves 111 can limit the movement of the mortise and tenon steel connectors 10 along the side faces of the rectangular wooden column 11. On this basis, an adapter frame 13 is used to fixedly connect two adjacent mortise and tenon steel connectors 10. When one mortise and tenon steel connector 10 attempts to escape from the mortise groove 111, the other mortise and tenon steel connector 10 is pulled deeper into the corresponding mortise groove 111 by the adapter frame 13, and the two mortise and tenon steel connectors 10 restrain each other to form a stable assembly. At the same time, the adapter frame 13 can clamp the rectangular wooden beam 12, and together with the cooperation between the beam-inserting steel member 104 and the beam mortise groove 121, a limit for the rectangular wooden beam 12 is formed.

[0035] Since the mortise grooves 111 and the beam mortise groove 121 do not need to penetrate the wood and the quantity is limited, it is possible to reduce the damage to the mechanical properties of the wood itself while forming the modular wooden structure node 1.

[0036] It can be understood that in the present invention, an ordinary steel plate can be used as the adapter frame 13, and drilling and threading assembly or direct welding can be carried out at the part where it fits with the mortise and tenon steel connector 10.

[0037] In one embodiment, adjacent mortise and tenon steel connectors 10 are fixedly connected through an adapter frame 13. A second threaded hole 1033 is formed in the flange 1031 of the channel steel 103. The adjacent mortise and tenon steel connectors 10 are respectively bolted to the adapter frame 13 through the second threaded holes 1033.

[0038] In order to achieve a more stable assembly, in one embodiment of the present invention, as Figure 4 and Figure 5 shown, the adapter frame 13 is a double-channel steel connector, and the double-channel steel connector may include two right-angle channel steels 131 fixedly welded. A third threaded hole 1311 is formed in any one of the right-angle channel steels 131. The 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.

[0039] Since the double-channel steel connector is obtained by welding two mutually perpendicular right-angle channel steels 131, when the double-channel steel connector is assembled in the modular wooden structure node 1, the bottom surfaces of the two right-angle channel steels 131 will respectively abut against the corresponding rectangular wooden beams 12, and the abutting surfaces are opposite to the surfaces where the beam mortise grooves 121 are formed, forming an assembly relationship in which the rectangular wooden beam 12 is located inside the right-angle channel steel 131 and the mortise and tenon steel connector 10 blocks the right-angle channel steel 131. Combining with the matching structure of the embedded beam steel member 104 and the beam mortise groove 121 in the present invention, the adapter frame 13 and the embedded beam steel member 104 at this time can prevent the rectangular wooden beam 12 from moving in any direction, greatly improving the assembly stability of the rectangular wooden beam 12 in the modular wooden structure node 1.

[0040] In the present invention, the embedded column steel member 102 can be fixed at any position, such as Figure 1 exemplarily shown, the embedded column steel member 102 is fixed at the middle position of the rectangular steel plate 101 in the height direction, and only the column mortise grooves 111 with corresponding shapes and positions need to be formed on the rectangular wooden column 11. The distance between the middle of the column mortise groove 111 and the top of the rectangular wooden column 11 is approximately half of the height of the rectangular steel plate 101.

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

[0042] As Figure 6 shown, the embedded column steel member 102A is used to exemplarily represent the form in which the embedded column steel member 102 is welded to the lower edge of the rectangular steel plate 101, and the embedded column steel member 102B is used to exemplarily represent the form in which the embedded column steel member 102 is welded to the lower edge of the rectangular steel plate 101. When assembled on the rectangular wooden column 11, as Figure 7As shown, in order to align the corresponding column tenon grooves 111, the inserted-column steel member 102B is rotated by 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 at a greater distance 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, 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 groove 111 on the rectangular wooden column 11 not only provides an anchoring effect for the transfer rack 13 in the horizontal direction, but also needs to bear the gravity of the transfer rack 13 and the rectangular wooden beam 12 in the vertical direction, the column tenon groove 111 can be set in a C shape in itself 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 and tenon steel connector 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 and tenon steel connector 10. Therefore, the beam tenon groove 121 can be set in a vertical one-shaped form 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, and the modular wooden structure node 1 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 and tenon steel connector 10 provided in the first aspect of the present invention, the inserted-column steel member 102 of the mortise and tenon steel connector 10 is embedded in the column tenon groove 111, and the inserted-beam steel member 104 of the mortise and tenon steel connector 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 through an adapter frame 13. The adapter frame 13 is a double-channel steel connector, and the double-channel steel connector may include two right-angle channel steels 131 fixed by welding. A third threaded hole 1311 is formed in any one of the right-angle channel steels 131, and 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 cross-section of the double-channel steel 103 provides a larger moment of inertia (for example, 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 joint deformation. In the design of the double-channel steel 103, when the double-channel steel connector is assembled in the modular wood structure joint 1, the bottom of the two right-angle channel steels 131 will respectively abut against the corresponding rectangular wooden beam 12, and the abutting surface is opposite to the surface where the beam mortise groove 121 is formed, forming an assembly relationship where the rectangular wooden beam 12 is located inside the right-angle channel steel 131 and the mortise and tenon steel connector 10 seals the right-angle channel steel 131. Combining with the matching structure of the embedded beam steel member 104 and the beam mortise groove 121 in the present invention, the adapter frame 13 and the embedded beam steel member 104 at this time can prevent the rectangular wooden beam 12 from moving in any direction, greatly improving the assembly stability of the rectangular wooden beam 12 in the modular wood structure joint 1.

[0051] Furthermore, a stiffening rib may be provided between the two right-angle channel steels 131. The stiffening rib divides the web plate 1032 of the channel steel 103 into smaller plate areas, increasing the critical buckling stress of the web plate 1032. At the same time, through the support of the stiffening rib, stress concentration around the weld or bolt hole is avoided, reducing the risk of fatigue cracking.

[0052] Moreover, in order to further improve the structural strength, in one embodiment, structural adhesive is poured into the column mortise groove 111 or the beam mortise groove 121.

[0053] The structural adhesive forms a continuous force transmission path between the steel and the wood, increasing the stiffness of the joint, and can fill the tiny gaps caused by machining tolerances to ensure full contact between the steel member and the wood, enhancing the reliability of the joint.

[0054] It can be understood that whether to use structural adhesive depends on the actual project requirements. In some embodiments, in order to facilitate the reuse of the modular wood structure joint 1, the modular wood structure joint 1 is usually designed as a detachable structure, and in this case, materials such as structural adhesive should be avoided.

[0055] In the present application, in one embodiment, the inner contour of the column mortise groove 111 is in the shape of an I-beam, a return shape, or a U-shape. The length of the embedded column steel member 102 is equal to the depth of the column mortise groove 111, and the depth of the column mortise groove 111 is equal to half of the side length of the rectangular wooden column 11.

[0056] The I-shaped or U-shaped profile increases the fitting area between the steel member and the wood, significantly enhancing the uplift bearing capacity of the joint. The tenon groove depth is controlled within 1 / 2 of the side length of the wooden column, which not only ensures the connection strength but also avoids excessive weakening of the wooden column section.

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

[0058] The arrangement of the tenon groove perpendicular to the grain direction takes advantage of the high compressive strength of the wood in the cross-grain direction to prevent shear failure along the grain. Controlling the tenon groove height within a reasonable range not only ensures the embedding depth of the steel member but also retains enough wood section to bear the load.

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

[0060] The high elastic modulus of the carbon fiber cloth can restrain the swelling and shrinkage deformation of the wood, reduce the joint loosening caused by environmental humidity changes, and the carbon fiber cloth works together with the steel member to form a composite reinforcement system, which can further enhance the bearing capacity of the joint.

[0061] As Figure 8 shown, an assembly process of a modular wooden structure joint 1 is exemplarily given. Among them, steps 1-3 show the assembly process of the mortise-tenon steel connector 10, step 4 shows the process of assembling the rectangular wooden beam 12, and steps 7-12 detail the process of exemplarily reusing the modular wooden structure joint 1 and finally forming a large wooden structure.

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

[0063] Compared with the prior art, the mortise-tenon steel connector 10 and the modular wooden structure joint 1 for the modular wooden structure joint 1 in the embodiments of the present invention have the following beneficial effects:

[0064] The mortise and tenon steel connector 10 of the embodiment of the present invention is connected to the wooden column and the wooden beam by embedding the column steel member 102 into the column mortise groove 111 and the beam steel member 104 into the beam mortise groove 121, avoiding a large number of holes being drilled in the wooden structure. This connection method can maximally retain the original structure of the wood, reduce the damage to the continuity and integrity of the wood fibers, thereby reducing the weakening of the strength of the wooden structure itself, and enabling the wooden structure to better exert its mechanical properties. At the same time, 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 with each other to form a relatively stable connection structure. The column steel member 102 is adapted to the column mortise groove 111, and the beam steel member 104 is adapted to the beam mortise groove 121, which can achieve a good mortise and tenon joint. Then, by bolt-connecting the first threaded holes 1011 on the rectangular steel plate 101 to the adjacent modular wooden structure node 1, the stability of the connection is further enhanced. This dual connection method enables the node to transfer the load more evenly when stressed, reducing the safety hazards caused by unstable connection. It can be seen that the mortise and tenon steel connector 10 in the present invention can reduce the damage to the mechanical properties of the wood itself while ensuring the structural strength.

[0065] Through the embedded design of the regular rectangular mortise groove and the mortise and tenon steel connector 10, combined with technical means such as double channel steel connectors, structural adhesive perfusion and carbon fiber cloth wrapping, the efficient connection and performance optimization of the modular wooden structure node 1 are realized. Specifically, the regular rectangular cross-section mortise grooves opened on the wooden column and the wooden beam (for example, the column mortise groove 111 adopts an I-shaped, a return-shaped or a U-shaped, and the beam mortise groove 121 adopts a rectangular shape) are precisely fitted with the column steel member 102 and the beam steel member 104 in the mortise and tenon steel connector 10. This embedded design avoids the damage to the wood structure caused by traditional drilling, and at the same time increases the steel-wood contact area, making the load transfer more uniform. The double channel steel connector is composed of two right-angled channel steels 131 fixed by welding, and the adjacent mortise and tenon steel connectors 10 are reliably connected by bolts. The stiffeners arranged inside further enhance the local stability of the node and effectively resist bending and torsional loads; while the structural adhesive poured into the mortise groove fills the tiny gaps between the steel and the wood, enhances the interfacial bonding force, 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 member and the steel connector, using its high elastic modulus characteristics, restricts the swelling and shrinkage deformation of the wood, inhibits the crack propagation, and greatly improves the crack resistance and durability of the node.

[0066] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A mortise and tenon steel connector for modular wood 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). Column mortise grooves (111) are provided on two adjacent faces of the rectangular wooden column (11), and a beam mortise groove (121) is provided on one face of the rectangular wooden beam (12). The mortise and tenon steel connector (10) includes: A rectangular steel plate (101) with a first threaded hole (1011) provided thereon for bolt connection with the adjacent modular wooden structure node (1); A column-inserting steel member (102) perpendicularly and fixedly connected to one end of the rectangular steel plate (101), and the outer contour of the column-inserting steel member (102) is adapted to the inner contour of the column mortise groove (111) so that the column-inserting steel member (102) is inserted into the column mortise groove (111); A channel steel (103) with a flange (1031) perpendicularly and fixedly connected to the other end of the rectangular steel plate (101), and the first threaded hole (1011) is provided in the area of the rectangular steel plate (101) covered by the channel steel (103); A beam-inserting steel member (104) fixedly connected to the web (1032) of the channel steel (103), and the beam-inserting steel member (104) is located on the side away from the rectangular steel plate (101). The outer contour of the beam-inserting steel member (104) is adapted to the inner contour of the beam mortise groove (121) so that the beam-inserting steel member (104) is inserted into the beam mortise groove (121).

2. The mortise and tenon steel connector according to claim 1, characterized in that, Adjacent mortise and tenon steel connectors (10) are fixedly connected through an adapter frame (13). Second threaded holes (1033) are provided on the flanges (1031) of the channel steel (103), and adjacent mortise and tenon steel connectors (10) are bolt-connected to the adapter frame (13) respectively through the second threaded holes (1033).

3. The mortise and tenon steel connector according to claim 1, wherein The column-inserting steel member (102) is welded to the lower edge or the upper edge of the rectangular steel plate (101).

4. A modular wooden structure joint, characterized in that, The modular wooden structure node (1) includes: A rectangular wooden column (11) with column mortise grooves (111) provided on two adjacent faces thereof; A rectangular wooden beam (12) with a beam mortise groove (121) provided on one face thereof; The mortise and tenon steel connector (10) according to any one of claims 1-3, wherein the column-inserting steel member (102) of the mortise and tenon steel connector (10) is inserted into the column mortise groove (111), and the beam-inserting steel member (104) of the mortise and tenon steel connector (10) is inserted into the beam mortise groove (121).

5. The modular wooden structure joint according to claim 4, characterized in that, The adjacent mortise and tenon steel connectors (10) are fixedly connected through a transfer frame (13). The transfer frame (13) is a double-channel steel connector, and the double-channel steel connector includes two right-angle channel steels (131) welded and fixed. A third threaded hole (1311) is provided on any one of the right-angle channel steels (131). The 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).

6. The modular wooden structure joint according to claim 5, characterized in that, Stiffening ribs are provided between the two right-angle channel steels (131).

7. The modular wooden structure joint according to claim 4, characterized in that, The inside of the column mortise groove (111) or the beam mortise groove (121) is filled with structural adhesive.

8. The modular wooden structure joint according to claim 4, characterized in that, The inner contour of the column mortise groove (111) is in the shape of an I-shape, a return shape or a U-shape. The length of the column-inserting steel member (102) is equal to the depth of the column mortise groove (111), and the depth of the column mortise groove (111) is equal to half of the side length of the rectangular wooden column (11).

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

10. The modular wooden structure joint 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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