An assembled wooden reticulated shell joint with nested steel members

Abstract

The present invention relates to the technical field of wooden building structures, and particularly to a prefabricated wooden reticulated shell joint with nested steel members. It includes a mortise-and-tenon type steel hub, and the mortise-and-tenon type steel hub includes a steel hub with a polygonal cross-sectional shape. At least one side wall of the steel hub is welded with a first nested steel member, and the first nested steel member is embedded in a wooden member. A second nested steel member is embedded in the side of the wooden member opposite to the first nested steel member, and the second nested steel member is bolted to the steel hub. The present invention uses steel members as the mortise-and-tenon connecting parts of the joint and is finally fixed by bolts, reducing the material damage and initial slip between components caused by the large amount of grooving required for traditional wooden mortise-and-tenon joints and the use of metal connecting parts, thereby improving the mechanical properties of the joint. At the same time, this joint form is convenient for damage detection and repeated installation and disassembly, which is beneficial to the green circular use of wooden structure buildings and the construction and installation is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of wooden building structures, and particularly to a prefabricated wooden reticulated shell joint with nested steel members. Background Art

[0002] With the popularization and promotion of green circular buildings, wooden structures have been widely applied in reticulated shell structures again due to their advantages such as light weight, low energy consumption, and environmental protection. Currently, in order to meet the structural performance of buildings, connection methods such as pin connection, key connection, rivet connection, bolt connection, and toothed plate connection are usually adopted for wooden reticulated shell structures. However, when using such metal connection methods, metal connectors will cause certain damage to the original material properties of wooden members at the initial stage of force application at the wooden structure joints and there is obvious initial slip, resulting in a relatively low lateral stiffness of the structure and being prone to cross-grain splitting failure of the wood at the joints.

[0003] In addition, when constructing in a point-by-point and step-by-step installation method, the technical requirements for workers are relatively high. Especially when the span of the wooden reticulated shell structure is large, the nature of the glued laminated wood material also determines that the cross-sectional dimensions of the members are large, and the configuration of the conventional connection components gathered at the joints is complex, resulting in difficult construction and making it difficult to guarantee the construction quality and joint performance. In addition, these connectors are difficult to disassemble and reuse, which is not conducive to the recycling of temporary wooden buildings and also not conducive to the implementation of recycling measures such as inspection, repair, and reinforcement during the use of wooden buildings.

[0004] In view of the above problems, the present invention is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a prefabricated wooden reticulated shell joint with nested steel members, which can avoid the initial material damage and initial slip caused by metal connectors to wooden members at the initial stage of force application at the wooden structure joints, improve the mechanical properties of the joints, and is easy to install, disassemble, and recycle.

[0006] The present invention provides a prefabricated wooden reticulated shell joint with nested steel members, including a mortise and tenon type steel hub. The mortise and tenon type steel hub includes a steel hub with a polygonal cross-sectional shape. At least one side wall of the steel hub is welded with a first nested steel member, the first nested steel member is embedded in a wooden member, a second nested steel member is embedded in the side of the wooden member opposite to the first nested steel member, and the second nested steel member is bolted to the steel hub.

[0007] Preferably, the first nested steel member includes a first web, the first web is welded to the steel hub, first flanges are welded to both sides of the first web, first stiffeners are welded to the first web, mortise grooves are formed in the wooden member, the first stiffeners are embedded in the mortise grooves, and the two first flanges are respectively in close contact with the upper and lower side walls of the wooden member.

[0008] Preferably, the second nested steel member includes a second web, second flanges are welded to both sides of the second web, second stiffeners are welded to the second web, the mortise grooves on the wooden member penetrate through two opposite side walls, the second stiffeners are embedded in the mortise grooves on the other side wall of the wooden member, and the two second flanges are respectively in close contact with the upper and lower side walls of the wooden member.

[0009] Preferably, first threaded holes are provided on the side wall of the steel hub, the first threaded holes are located on the upper and lower sides of the first web, ear plates are provided on the second flanges, second threaded holes are provided on the ear plates, and the first threaded holes are bolted to the second threaded holes.

[0010] Preferably, first threaded holes are provided on the side wall of the steel hub, the first threaded holes are located on a side far from the first web, ear plates are provided on the second web, second threaded holes are provided on the ear plates, and the first threaded holes are threadedly connected to the second threaded holes.

[0011] Preferably, the spacing distance between the first web and the lateral edge of the steel hub satisfies the following conditions:

[0012]

[0013] Where: d is the distance between the first web and the outer edge of the side wall of the steel hub where it is located, w is the width of the wooden member, n is the number of sides of the steel hub, l is the side length of the steel hub, and t is the thickness of the first web.

[0014] Preferably, the length of the first web is equal to the horizontal distance between the end of the wooden member close to the steel hub and the mortise groove, the length of the first flange is equal to the length of the first web, and the width of the first flange is equal to half of the width of the wooden member.

[0015] Preferably, the cross-sectional shape of the steel hub is a regular hexagon, the shape of the wooden member is a rectangle, the shape of the mortise groove is a straight shape or an I-shaped shape, and the shape of the first stiffener is consistent with the shape of the mortise groove; the width of the first stiffener is equal to the width of the first flange.

[0016] Preferably, the shapes and sizes of the second web, the second flange, and the second stiffener are the same as those of the first web, the first flange, and the first stiffener, respectively.

[0017] In summary, compared with the prior art, the present invention has the following advantages:

[0018] (1) The technical solution of the present invention uses a mortise and tenon type steel hub as the mortise and tenon connecting member of the wooden reticulated shell node, reducing the material damage caused by grooving the wooden members in traditional wooden mortise and tenon joints, thereby improving the mechanical properties of the nodes; using steel members to transmit force and bolt connection for final force bearing, improving the stiffness of the nodes and enabling the nodes to be accurately integrated in force, thereby enhancing the integrity of the reticulated shell structure; using bolt connection to fix the nodes, reducing the initial material damage caused by connecting members such as nail plates, bolts, toothed plates, split rings, shear plates, and hooking members to the wooden members and the initial slip between the bolts and the wooden members.

[0019] (2) All components provided by the present invention are mainly prefabricated in the factory and assembled on site. During the installation process, due to the mortise and tenon action of the mortise and tenon type steel hub, the wooden members are constrained both horizontally and vertically and will not displace during the installation process, avoiding the occurrence of deviations. In addition, due to the limiting action of the wooden members and the mortise and tenon type steel hub, during the installation of the second nested steel member, it only needs to be aligned and inserted into the wooden member, which not only makes the installation process simpler but also can avoid installation errors. Finally, using bolt fixation, there is basically no deviation and the installation is simple, which not only reduces the on-site operation of workers but also has low requirements for the technical level of construction personnel, and the construction quality is easier to guarantee.

[0020] (3) The assembled wooden reticulated shell node provided by the present invention is convenient for inspection, disassembly, replacement, reinforcement, etc., extending the service life of the structure. When disassembling, only the reverse process of the assembly process needs to be implemented, which is simple and convenient and will not cause unnecessary damage to the wooden members, facilitating the recycling of temporary wooden buildings. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of the mortise and tenon type steel hub in Embodiment 1 of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the wooden member in Embodiment 1 of the present invention;

[0024] Figure 3 It is a schematic structural view of the second nested steel member in Embodiment 1 of the present invention;

[0025] Figure 4 It is a schematic structural view of the mortise - tenon type steel hub nested with a wooden member in Embodiment 1 of the present invention;

[0026] Figure 5 It is a schematic structural view of the mortise - tenon type steel hub, the second nested steel member nested with a wooden member in Embodiment 1 of the present invention;

[0027] Figure 6 It is a top view of the mortise - tenon type steel hub, the second nested steel member nested with a wooden member in Embodiment 1 of the present invention;

[0028] Figure 7 It is a schematic structural view of the complete joint in Embodiment 1 of the present invention;

[0029] Figure 8 It is a schematic structural view of the mortise - tenon type steel hub in Embodiment 2 of the present invention;

[0030] Figure 9 It is a schematic structural view of the wooden member in Embodiment 2 of the present invention;

[0031] Figure 10 It is a schematic structural view of the second nested steel member in Embodiment 2 of the present invention;

[0032] Figure 11 It is a schematic structural view of the connection of the mortise - tenon type steel hub, the second nested steel member with a wooden member in Embodiment 2 of the present invention;

[0033] Figure 12 It is a schematic structural view of the complete joint in Embodiment 2 of the present invention.

[0034] Explanation of reference numerals: 1 - mortise - tenon type steel hub, 101 - steel hub, 102 - first threaded hole, 2 - first nested steel member, 201 - first web, 202 - first flange, 203 - first stiffening rib, 3 - wooden member, 301 - mortise groove, 4 - second nested steel member, 401 - second web, 402 - second flange, 403 - second stiffening rib, 404 - ear plate, 405 - second threaded hole, 5 - bolt. Detailed implementation manners

[0035] Next, the technical solutions of the present invention will be described clearly and completely in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined. In addition, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Embodiment 1

[0039] An assembled wooden reticulated shell joint with nested steel members, comprising a mortise-tenon type steel hub 1, a second nested steel member 4 and a wooden member 3, as Figure 1-7 shown.

[0040] As Figure 1 shown, the mortise-tenon type steel hub 1 includes a steel hub 101 with a polygonal cross-sectional shape. In this embodiment, the cross-sectional shape of the steel hub 101 is a regular hexagon. A first nested steel member 2 is welded to each side wall of the steel hub 101. The first nested steel member 2 includes a first web 201, and the first web 201 is welded to the side wall of the steel hub 101. First flanges 202 are welded to both the upper and lower sides of the first web 201. At the same time, the first flanges 202 are also welded to the side wall of the steel hub 101. A first stiffening rib 203 is welded at the center of the first web 201 in the vertical direction. The shape and quantity of the first stiffening rib 203 can be adjusted according to the needs of the joint performance. In this embodiment, two first stiffening ribs 203 in the shape of a straight bar are provided.

[0041] As Figure 2As shown, the shape of the wooden member 3 is rectangular. A mortise groove 301 penetrating two opposite side walls is formed on the wooden member 3. The first stiffening rib 203 is embedded in the mortise groove 301. The inner sides of the two first flanges 202 are closely attached to the upper and lower sides of the wooden member 3 respectively. The height of the mortise groove 301 is less than the height of the wooden member 3 and is centered in the vertical direction. The shape and quantity of the mortise groove 301 are the same as those of the first stiffening rib 203.

[0042] As Figure 3 As shown, the second nested steel member 4 includes a second web 401. Second flanges 402 are welded to both sides of the second web 401. A second stiffening rib 403 is welded to the second web 401. The second stiffening rib 403 is embedded in the mortise groove 301 on another side wall of the wooden member 3. The two second flanges 402 are respectively closely attached to the upper and lower side walls of the wooden member 3. The shapes, dimensions, and welding methods of the second web 401, the second flanges 402, and the second stiffening rib 403 are the same as those of the first web 201, the first flanges 202, and the first stiffening rib 203.

[0043] The first flanges 202 and the second flanges 402 are provided to clamp the wooden member 3 and restrict its vertical displacement; the first stiffening rib 203 and the second stiffening rib 403 are embedded in the wooden member 3 to restrict its lateral displacement.

[0044] The height of the first web 201 is less than the height of the side wall of the steel hub 101. First threaded holes 102 are respectively formed on the upper and lower sides of the side wall of the steel hub 101 where the first web 201 is located. Ear plates 404 are welded to the second flanges 402 on both sides of the second web 401. Second threaded holes 405 are formed on the ear plates 404. The first threaded holes 102 and the second threaded holes 405 are connected by bolts 5. The method of bolt connection is used to fix the joint, reducing the initial material damage to the wooden member caused by connecting pieces such as nail plates, toothed plates, split rings, shear plates, and hook members, and the initial slip between the bolts and the wooden member. The steel members are used for force transmission, and the bolts are used for the final force bearing, improving the stiffness of the joint and enabling the joint to be accurately integrated in force, thereby enhancing the integrity of the reticulated shell structure.

[0045] As Figure 6 As shown, the spacing distance between the first web 201 and the lateral edge of the steel hub 101 satisfies the following conditions:

[0046]

[0047] In the formula: d is the distance between the first web 201 and the outer edge of the side wall of the steel hub 101 where it is located, w is the width of the wooden member 3, n is the number of sides of the steel hub 101, l is the side length of the steel hub 101, and t is the thickness of the first web 201.

[0048] The length of the first flange 202 is equal to the length of the first web 201, and the width is equal to half of the width of the wooden member 3. The width of the first stiffener 203 is equal to the width of the first flange 202, which is half of the width of the wooden member 3, and the height and thickness are equal to (or slightly less than in actual construction) the height and thickness of the mortise groove 301 in the wooden member 3. The horizontal distance between the outer side of the side wall of the first stiffener 203 and the steel hub 101 is equal to the horizontal distance between the end of the wooden member 3 near the steel hub 101 and the mortise groove 301, and is equal to the length of the first web 201 and the first flange 202.

[0049] Half of the height difference between the vertical edges of the first web 201 and the vertical edges of the steel hub 101 shall meet the relevant provisions in the corresponding steel structure design code for bolt connections of this joint.

[0050] At least one first stiffener 203 and one second stiffener 403 are provided, but their quantities, thicknesses and spacings can be adjusted according to the needs of joint performance. Similarly, the thicknesses of the first flange 202 and the second flange 402 can also be adjusted accordingly. The forms of the first stiffener 203 and the second stiffener 403 can be adjusted, for example, they can be made into diagonal or I-shaped forms to meet the needs of joint shape and design strength and stiffness requirements.

[0051] In the case where the structure needs to be fixed and used for a long time, structural adhesive can be added to the mortise groove of the wooden member to strengthen the contact between the steel plate and the wooden member, thereby improving the stiffness and strength of the joint. In the case of a temporary building, especially a temporary exhibition hall or building or exhibit with a small span, structural adhesive may not be added to the wooden groove to facilitate the disassembly and reuse of the structure. Of course, the premise is that the joint design can meet the structural performance requirements. When additional reinforcement is still needed in the joint area, carbon fiber cloth can be used for wrapping and pasting for strengthening. Since the cross-section of the wooden member is a regular rectangle, it is also convenient for the contact and winding of the carbon fiber cloth. For the bolt area, small-area steel plates with bolt holes can be used for strengthening, which is also convenient and fast. All these are beneficial to the reuse of the joint, extend the service life of the structure, and due to the regular structure of the joint, it is also conducive to the decorative design of the joint appearance.

[0052] The mortise groove provided on the wooden member has a regular rectangular cross-section. Compared with the traditional wooden tenon and mortise joint groove and the special-shaped groove of the current commonly used steel-filled plate bolt connection for wooden structures, its manufacturing simplicity is greatly improved, reducing the time and labor required for making the wooden groove.

[0053] The assembly steps of the above prefabricated wooden reticulated shell joint are as follows:

[0054] The first step: Embed the wooden member 3 from the outside to the inside and through the mortise groove 301 on the first stiffener 203 of the first web 201 to form a first-stage assembly, as Figure 4 shown;

[0055] Step 2: Embed the second nested steel member 4 from the outside to the inside into the mortise groove 301 on the other side of the wooden member 3 to form a second-level assembly, as Figure 5 shown;

[0056] Step 3: Use bolts 5 to fix the mortise and tenon steel hub 1 and the second nested steel member 4 to form a third-level assembly;

[0057] Step 4: Repeat the above steps five times, and install the wooden member 3 and the second nested steel member 4 on the other five side walls of the steel hub 101 respectively, then the installation of the complete joint can be completed, and the structure of the complete joint is as Figure 7 shown.

[0058] Embodiment 2

[0059] An assembled wooden reticulated shell joint with nested steel members. The technical solution of this embodiment is basically the same as that of Embodiment 1, except that:

[0060] In this embodiment, the shape of the first stiffening rib 203 is I-shaped, as Figure 8 shown; the shape of the mortise groove 301 on the wooden member 3 is I-shaped, as Figure 9 shown; the shape of the second stiffening rib 403 on the second nested steel member 4 is also I-shaped, as Figure 10 shown; the first threaded hole 102 on the side wall of the steel hub 101 is located on the side far from the first web 201, and there is only one ear plate 404, which is welded on the second web 401; the vertical height of the first web 201 is equal to the height of the steel hub 101.

[0061] The distance between the first web 201 and the lateral edge of the steel hub 101 satisfies the following conditions:

[0062]

[0063] Where: d is the distance between the first web 201 and the outer edge of the side wall of the steel hub 101 where it is located, w is the width of the wooden member 3, n is the number of sides of the steel hub 101, l is the side length of the steel hub 101, t is the thickness of the first web 201, and s is the length of the ear plate 404.

[0064] The installation steps of the above-mentioned assembled wooden reticulated shell joint are the same as those of Embodiment 1. Among them, the mortise and tenon steel hub 1, the second nested steel member 4 and a wooden member 3 are connected as Figure 11 shown, and the structure of the complete joint is as Figure 12 shown.

[0065] The assembled wooden reticulated shell joint provided by the present invention uses steel components as tenon and mortise connectors of the joint, uses steel plates to bidirectionally restrain the wooden components in the joint, and finally fixes and connects them with bolts to achieve the stability of the overall joint. This not only reduces the complexity of the notch, but also reduces the original material damage to the wood caused by the irregular notch. Similarly, it also avoids excessive initial slippage between metal connectors such as nail plates and tooth plates and wooden components. In addition, the stiffness and strength of the joint can be adjusted by adjusting the form of the stiffening rib, the number of stiffening ribs, the thickness of the flange, etc. It saves space and is aesthetically pleasing in architecture, and the connection structure is simple and more convenient for installation; each component that makes up the joint can be prefabricated and processed in the factory, and the on-site construction is mainly assembly-based. The installation process is simple and has few installation steps. The workload of bolt installation is small, and since the steel components in the installation process limit the vertical and horizontal displacements of the wooden components, it can greatly reduce the extra labor and fixing measures; during disassembly, only the reverse implementation of the assembly process is required, which is simple and convenient and will not cause unnecessary damage to the wooden components, which is beneficial to the recycling use of temporary wooden buildings.

[0066] In summary, the form and assembly method of the wooden reticulated shell joint provided by the present invention save building space, have a clear force transmission path, are safe and reliable, are simple and convenient for construction, meet the needs of actual engineering design and construction, are environmentally friendly and energy-saving, and this joint is conducive to disassembly, inspection, reinforcement and recycling use, better meeting the requirements of current green buildings and having good application value.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembled wooden reticulated shell joint with nested steel members, characterized in that It includes a mortise - tenon type steel hub (1). The mortise - tenon type steel hub (1) includes a steel hub (101) with a polygon - shaped cross - section. At least one side wall of the steel hub (101) is welded with a first nested steel member (2). The first nested steel member (2) is embedded in a wooden member (3). A second nested steel member (4) is embedded in the side of the wooden member (3) opposite to the first nested steel member (2). The second nested steel member (4) is bolt - connected to the steel hub (101). The first nested steel member (2) includes a first web (201). The first web (201) is welded to the steel hub (101). First flanges (202) are welded on both sides of the first web (201). A first stiffening rib (203) is welded on the first web (201). A mortise groove (301) is formed on the wooden member (3). The height of the mortise groove (301) is less than the height of the wooden member (3). The first stiffening rib (203) is embedded in the mortise groove (301). The two first flanges (202) are respectively in close contact with the upper and lower side walls of the wooden member (3).

2. The prefabricated wooden reticulated shell joint according to claim 1, wherein The second nested steel member (4) includes a second web (401). Second flanges (402) are welded on both sides of the second web (401). A second stiffening rib (403) is welded on the second web (401). The mortise groove (301) on the wooden member (3) penetrates through two opposite side walls. The second stiffening rib (403) is embedded in the mortise groove (301) on the other side wall of the wooden member (3). The two second flanges (402) are respectively in close contact with the upper and lower side walls of the wooden member (3).

3. The prefabricated wooden reticulated shell joint according to claim 2, characterized in that, First threaded holes (102) are provided on the side wall of the steel hub (101). The first threaded holes (102) are located on the upper and lower sides of the first web (201). Lugs (404) are provided on the second flanges (402). Second threaded holes (405) are provided on the lugs (404). The first threaded holes (102) are bolt - connected to the second threaded holes (405).

4. The fabricated wooden reticulated shell joint according to claim 2, wherein, First threaded holes (102) are provided on the side wall of the steel hub (101). The first threaded holes (102) are located on the side away from the first web (201). Lugs (404) are provided on the second web (401). Second threaded holes (405) are provided on the lugs (404). The first threaded holes (102) are bolt - connected to the second threaded holes (405).

5. The fabricated wooden reticulated shell joint according to claim 3, characterized in that The spacing distance between the first web (201) and the lateral edge of the steel hub (101) satisfies the following conditions: Wherein: d is the distance between the first web (201) and the outer edge of the side wall of the steel hub (101) where it is located, w is the width of the wooden member (3), n is the number of sides of the steel hub (101), l is the side length of the steel hub (101), t is the thickness of the first web (201).

6. The prefabricated wooden reticulated shell joint according to claim 3 or 4, characterized in that The length of the first web (201) is equal to the horizontal distance between the end of the wooden member (3) close to the steel hub (101) and the mortise groove (301). The length of the first flange (202) is equal to the length of the first web (201). The width of the first flange (202) is equal to half of the width of the wooden member (3).

7. The fabricated wooden reticulated shell joint according to claim 6, characterized in that, The cross-sectional shape of the steel hub (101) is a regular hexagon, the shape of the wooden member (3) is rectangular, the shape of the mortise groove (301) is a straight shape or an I-shaped, and the shape of the first stiffening rib (203) is the same as that of the mortise groove (301); the width of the first stiffening rib (203) is equal to the width of the first flange (202).

8. The prefabricated wooden reticulated shell joint according to claim 7, characterized in that, The shapes and dimensions of the second web (401), the second flange (402), and the second stiffening rib (403) are the same as the shapes and dimensions of the first web (201), the first flange (202), and the first stiffening rib (203), respectively.

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