Composite structure node for large-span wood beam string structure

Abstract

The utility model discloses a composite structure node for a large-span wood beam string structure, and belongs to the technical field of wood structure construction. The composite structure joint provided by the utility model comprises a through bolt, a beam end reinforcing member and a wood beam. Mounting grooves matched with the beam end reinforcing pieces are formed in the wood beams, the beam end reinforcing pieces are embedded into the mounting grooves in the length direction, and the beam end reinforcing pieces and the wood beams are fixedly connected through opposite-penetrating screws. The beam end reinforcing piece is provided with a connecting hole used for being connected with a cable head of the inhaul cable and a through hole used for fixing the inhaul cable. The end portion of the wood beam and the specially-made steel structure accessory are combined, inhaul cable tensioning is conducted, the wood beam and the specially-made steel structure accessory form a whole, the structural strength of the wood beam structure is improved, the wood beam structure can better adapt to a large-span building system, and meanwhile the compatibility with other materials and the conversion efficiency of the wood beam structure and other materials are improved.

Description

Technical Field

[0001] This utility model belongs to the field of timber structure construction technology, specifically relating to a composite structural node for large-span timber tensioned beam structures. Background Technology

[0002] In recent years, the development of the timber structure building industry has been gradually promoted in order to meet the needs of green building and sustainable development. However, the traditional timber beam building structure system has an overall linear layout with mortise and tenon joints on both sides, resulting in a high cross-sectional loss ratio, low structural efficiency, and difficulty in meeting the higher structural and mechanical requirements of modern times.

[0003] With the promotion of modern timber structure construction in my country, a new type of timber beam building has emerged, combining steel, cables, and timber. This structural form is expressed holistically through timber tensioned beam members, characterized by: the main structure being timber beams, with both ends of the timber beams tensioned and connected by steel cables; the ends of the timber beams are connected to steel structural components via through bolts, and are hinged to the columns on both sides, resulting in a crescent-shaped overall structure. Using steel-timber connection nodes instead of mortise and tenon joints helps ensure the stiffness and stability of the timber beam nodes. However, this form is not suitable for large-span timber beam structures. Due to the special properties of timber, its low modulus of elasticity leads to a greater tendency for the timber beams to deflect when the span is too large, making them more prone to failure. Therefore, there is an urgent need to develop a structural node that enhances the stability of large-span timber tensioned beam structures to ensure structural safety and stability. Utility Model Content

[0004] The purpose of this utility model is to overcome the problems existing in the background technology and to provide a composite structural node for large-span timber tensioned beam structures.

[0005] The specific technical solution adopted in this utility model is as follows:

[0006] This utility model provides a composite structural node for a large-span timber tensioned beam structure, including through bolts, beam end reinforcements and timber beams;

[0007] The beam end reinforcement includes a top plate, a web plate, a connecting plate, a bottom plate, and an end assembly. The top plate and the bottom plate are the same size and are arranged in parallel at intervals. The web plate is vertically fixed between the top plate and the bottom plate, and has several fixing holes that match the through bolts. The connecting plate is vertically fixed to the bottom surface of the bottom plate, and has connecting holes at its ends for connecting to the cable heads. The end assembly includes two ear plates and a splicing plate. One side of the splicing plate is vertically fixed between the top plate and the bottom plate. Two ear plates are arranged in parallel at intervals on the other side of the splicing plate. The two ear plates have through holes for fixing the cables.

[0008] The wooden beam has an installation groove that fits the beam end reinforcement; several fixing holes that match the through bolts are also opened on both sides of the wooden beam; the beam end reinforcement is embedded in the installation groove of the wooden beam along the length direction, and the beam end reinforcement is fixedly connected to the wooden beam by the through bolts.

[0009] Preferably, the through-bolt includes a bolt, a nut, and a washer; the bolt passes through the fixing holes on both sides of the web and the wooden beam, and the washer is located on the outer side of both sides of the wooden beam. The beam end reinforcement is fixedly connected to the wooden beam by tightening the nut.

[0010] Preferably, the web plate is fixedly connected to the top plate and the bottom plate by welding.

[0011] Preferably, the beam end reinforcement is fixed to the cable head by a pin connection.

[0012] Preferably, the length of the wooden beam is ≥3000mm, and the through bolts are arranged in at least six rows, with a spacing of 100mm to 150mm between each two rows.

[0013] Preferably, the length of the wooden beam is less than 3000mm, and the through bolts are arranged in two rows with a spacing of 100mm to 150mm between each two rows.

[0014] Preferably, washers are provided on both sides of the connection hole position of the connecting plate.

[0015] Preferably, the thickness of the beam end reinforcement is ≥20mm, that is, the thickness of the top plate, web plate and bottom plate is ≥20mm.

[0016] Furthermore, the lengths of the top plate, web plate, and bottom plate in the beam end reinforcement are greater than or equal to the distance between the center point of the through hole on the ear plate and the center point of the connecting hole on the connecting plate.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] The composite structural node provided by this utility model combines the ends of wooden beams with specially designed steel structural components and tensions them with cables to make them a unified whole. This improves the structural strength of the wooden beam structure, making it better suited for large-span building systems, while also enhancing compatibility and conversion efficiency with other materials. Furthermore, the steel nodes in this utility model are manufactured using standardized factory production, ensuring not only the quality and performance of the nodes but also effectively reducing production costs and improving overall economic benefits. Moreover, the node provided by this utility model has a simple structure, is convenient for on-site construction, improves construction efficiency, saves construction costs, and has good economic benefits. Attached Figure Description

[0019] Figure 1This is a schematic diagram of a composite structural node for a large-span timber tensioned beam structure provided in this embodiment;

[0020] Figure 2 This is a schematic diagram of the fastener;

[0021] Figure 3 Schematic diagram of beam end reinforcement;

[0022] Figure 4 This is a schematic diagram of a wooden beam;

[0023] Figure 5 This is a schematic diagram of the composite structure node dimensions for a large-span timber tensioned beam structure provided in this embodiment;

[0024] In the diagram: through bolt 1, threaded rod 1-1, nut 1-2, washer 1-3, beam end reinforcement 2, top plate 2-1, web plate 2-2, connecting plate 2-3, bottom plate 2-4, end assembly 2-5, washer 2-6, wooden beam 3, wooden beam side mounting hole 3-1. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0026] It should be understood that terms such as "having," "comprising," and "including" as used herein do not exclude the presence or addition of one or more other elements or combinations thereof. It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are conventional methods, and the materials described, unless otherwise specified, are commercially available. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "installed" should be interpreted broadly, for example, as fixed connection or installation, detachable connection or installation, or integral connection or installation. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may change. Furthermore, the accompanying drawings of the embodiments disclosed in this utility model only involve structures mentioned in the embodiments of this disclosure; other structures can refer to common designs. Where there is no conflict, the same embodiment and different embodiments of this utility model can be combined with each other. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] like Figure 1 As shown in the preferred embodiment of this utility model, this embodiment provides a composite structural node for a large-span timber tensioned beam structure, including through bolts 1, beam end reinforcement 2, and timber beam 3. The beam end reinforcement 2 is provided in the timber beam 3 to enhance the structural strength of the timber structural member. In modern timber structure construction, the addition of the beam end reinforcement 2 allows the timber beam 3 to adapt to more large-span building systems, improves the conversion efficiency of the timber beam 3 with other materials, and effectively constrains the deformation at the ends of the timber beam 3.

[0028] like Figure 2 As shown, in the device provided in this embodiment, the through bolt 1 includes three parts: a screw 1-1, a nut 1-2, and a washer 1-3. In this embodiment, the through bolt 1 is provided with two washers 1-3, which are located at both ends of the screw 1-1, and two nuts 1-2 are provided on the side of the two washers 1-3 near the end of the screw 1-1.

[0029] like Figure 3As shown, in the device provided in this embodiment, the beam end reinforcement 2 includes a top plate 2-1, a web plate 2-2, a connecting plate 2-3, a bottom plate 2-4, and an end assembly 2-5. The top plate 2-1 and the bottom plate 2-4 are the same size and are arranged parallel to each other. The web plate 2-2 is provided between the top plate 2-1 and the bottom plate 2-4. The two ends of the web plate 2-2 along its length are perpendicularly fixed to the top plate 2-1 and the bottom plate 2-4, respectively. Considering the firmness, welding is generally used for fixing. In this embodiment, the web plate 2-2, the top plate 2-1, and the bottom plate 2-4 are the same length. The web plate 2-2 has several fixing holes that match the screws 1-1 of the through bolts 1, and the diameter of the fixing holes is slightly larger than the diameter of the screws 1-1 of the through bolts 1, so that the screws 1-1 can pass smoothly through the fixing holes. A connecting plate 2-3 is vertically fixed to the bottom surface of the base plate 2-4. The end of the connecting plate 2-3 has a connecting hole for connecting to the cable head. The cable head is connected and fixed to the connecting plate 2-3 via a pin. Washers 2-6 are provided at the positions of the connecting holes on both sides of the connecting plate 2-3 to improve the stress condition of the connecting plate 2-3 to a certain extent, preventing loosening of the connection between the beam end reinforcement 2 and the cable due to vibration or impact during hoisting, thereby improving the reliability and stability of the connection. An end assembly 2-5 is fixedly installed at one end of the top plate 2-1 and the base plate 2-4. The end assembly 2-5 includes two ear plates and a splicing plate. One side of the splicing plate is fixed between the top plate 2-1 and the base plate 2-4, and two ear plates are arranged parallel to each other on the other side of the splicing plate. The two ear plates are the same shape and size, and through holes are provided on the ear plates for fixing the cable. To better adapt to the complex engineering requirements such as large spans and high loads, the splice plate is fixed by welding on one side to the top plate 2-1, web plate 2-2 and bottom plate 2-4, and on the other side to the ear plate, to improve the connection strength and enable the ear plate to withstand larger loads.

[0030] like Figure 4 As shown, in the device provided in this embodiment, the middle part of the wooden beam 3 has an installation groove that matches the size of the beam end reinforcement 2, so that the beam end reinforcement 2 can be embedded in the wooden beam 3 along its length. Several wooden beam side mounting holes 3-1 matching the through bolts 1 are opened on both sides of the wooden beam 3. The positions of the wooden beam side mounting holes 3-1 correspond to the positions of the fixing holes on the web plate 2-2. By using the through bolts 1, the bolts 1-1 are passed sequentially through the wooden beam side mounting holes 3-1 on one side of the wooden beam 3, the fixing holes on the web plate 2-2, and out through the wooden beam side mounting holes 3-1 on the other side of the wooden beam 3. Washers 1-3 are then placed on both sides of the bolts 1-1 to fit against both sides of the wooden beam 3. Nuts 1-2 are then tightened sequentially to firmly fix the beam end reinforcement 2 to the wooden beam 3. The diameter of the wooden beam side mounting holes 3-1 also needs to be slightly larger than the diameter of the bolts 1-1 to ensure that the bolts 1-1 can be inserted smoothly.

[0031] like Figure 5 As shown in the embodiment, in the device provided, for shorter wooden beams 3, the stress is relatively small, and the structural stability requirements are relatively low. Therefore, if the length of the wooden beam 3 is <3000mm, only two rows of through bolts 1 are needed to meet the structural connection and stress requirements. As the length of the wooden beam 3 increases, its stress complexity increases significantly, especially at the ends and middle parts where large bending moments and shear forces may occur. Increasing the number of rows of through bolts 1 can distribute the load more evenly, improving the overall stability and bending resistance of the structure. Therefore, if the length of the wooden beam 3 is ≥3000mm, at least 6 rows of through bolts 1 are required. The spacing of the through bolts 1 needs to be set to ensure structural stability while also considering construction costs and ease of operation. According to the specifications, excessively large spacing of the through bolts 1 can lead to uneven local stress and stress concentration; while excessively small spacing will increase material costs and construction difficulty. Therefore, the spacing B1 between every two rows of through bolts 1 is set to 100mm~150mm, which can meet the structural stress requirements and ensure construction efficiency. The number of rows of through bolts 1 can be set from 3 to 6 depending on the actual construction situation. However, this utility model does not limit the number of rows of through bolts 1, and those skilled in the art can choose according to the actual situation. In this embodiment, 4 rows of through bolts 1 are set according to the width of the wooden beam 3. Since the ends of the long-span wooden tensioned beam may bear large bending moments and shear forces, in order to prevent the beam end reinforcement 2 from bearing the load better, reduce deformation or damage caused by local stress concentration, and ensure the integrity and durability of the structure, the thickness of the beam end reinforcement 2 is ≥20mm, that is, the top plate 2-1, web plate 2-2 and bottom plate 2-4 all use steel plates with a thickness of ≥20mm. Furthermore, in order to ensure that the prestress of the cable can be effectively transferred to the wooden beam 3 and to avoid structural deformation or failure due to insufficient local stress, the length L1 of the top plate 2-1, web plate 2-2 and bottom plate 2-4 needs to cover the key stress area from the cable fixing or adjusting end to the beam end reinforcement 2. Therefore, the length L1 of the top plate 2-1, web plate 2-2 and bottom plate 2-4 needs to be greater than or equal to the distance C1 between the center point of the through hole on the ear plate and the center point of the connecting hole on the connecting plate 2-3.

[0032] The embodiments described above are merely preferred solutions of this utility model, and are not intended to limit the scope of this utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this utility model. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A composite structural joint for large-span timber-stayed beam structures, characterized in that, Includes through bolts (1), beam end reinforcements (2), and wooden beams (3); The beam end reinforcement (2) includes a top plate (2-1), a web plate (2-2), a connecting plate (2-3), a bottom plate (2-4), and an end assembly (2-5). The top plate (2-1) and the bottom plate (2-4) are the same size and are arranged in parallel at intervals. The web plate (2-2) is vertically fixed between the top plate (2-1) and the bottom plate (2-4), and the web plate (2-2) has several fixing holes that match the through bolts (1). The connecting plate (2-3) is vertically fixed to the bottom surface of the bottom plate (2-4), and the end of the connecting plate (2-3) has a connecting hole for connecting with the cable head. The end assembly (2-5) includes two ear plates and a splicing plate. One side of the splicing plate in the end assembly (2-5) is vertically fixed between the top plate (2-1) and the bottom plate (2-4). Two ear plates are arranged in parallel at intervals on the other side of the splicing plate. Through holes for fixing the cable are opened on the two ear plates. The wooden beam (3) has an installation groove that fits the beam end reinforcement (2); several wooden beam side installation holes (3-1) matching the through bolts (1) are also opened on both sides of the wooden beam (3); the beam end reinforcement (2) is embedded in the installation groove of the wooden beam (3) along the length direction, and the beam end reinforcement (2) and the wooden beam (3) are fixedly connected by the through bolts (1).

2. The composite structural node for large-span timber-stayed beam structures according to claim 1, characterized in that, The through bolt (1) includes a screw (1-1), a nut (1-2), and a washer (1-3); the screw (1-1) passes through the fixing holes on both sides of the web (2-2) and the wooden beam (3), and the washer (1-3) is located on the outer side of both sides of the wooden beam (3). The beam end reinforcement (2) is fixedly connected to the wooden beam (3) by tightening the nut (1-2).

3. The composite structural node for large-span timber-stayed beam structures according to claim 1, characterized in that, The web plate (2-2) is fixedly connected to the top plate (2-1) and the bottom plate (2-4) by welding.

4. The composite structural node for large-span timber tensioned beam structures according to claim 1, characterized in that, The beam end reinforcement (2) is fixed to the cable head by a pin.

5. The composite structural node for a large-span timber-stayed beam structure according to claim 1, characterized in that, The wooden beam (3) is ≥3000mm in length, and the through bolts (1) are arranged in at least six rows, with a spacing of 100mm to 150mm between each two rows.

6. The composite structural node for a large-span timber-chord beam structure according to claim 1, characterized in that, The length of the wooden beam (3) is less than 3000mm, and the through bolts (1) are arranged in two rows with a spacing of 100mm to 150mm between each two rows.

7. The composite structural node for a large-span timber-stayed beam structure according to claim 1, characterized in that, Washers (2-6) are provided on both sides of the connection hole position of the connecting plate (2-3).

8. The composite structural node for a large-span timber-stayed beam structure according to claim 1, characterized in that, The thickness of the beam end reinforcement (2) is ≥20mm, that is, the thickness of the top plate (2-1), web plate (2-2) and bottom plate (2-4) is ≥20mm.

9. The composite structural node for a large-span timber-stayed beam structure according to claim 8, characterized in that, The lengths of the top plate (2-1), web plate (2-2), and bottom plate (2-4) in the beam end reinforcement (2) are greater than or equal to the distance between the center point of the through hole on the ear plate and the center point of the connecting hole in the connecting plate (2-3).

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