Steel-wood connecting joint of long-span steel-arch timber structure with string

Abstract

The utility model provides a kind of steel-wood connecting joint of large-span string arch timber steel frame composite structure, including double-layered glued wood arch, steel web, node steel box, bracing bar ear plate and two pieces of reinforced wood beam, double-layered glued wood arch includes two layers parallelly arranged and has the spacing glued wood arch component, node steel box and reinforced wood beam are all clamped between two layers of glued wood arch component, and two pieces of reinforced wood beam are located on the opposite sides of node steel box and are in close contact with node steel box, and steel web and bracing bar ear plate are respectively fixed on the upper surface and lower surface of node steel box. By inserting node steel box as core connecting piece in the gap of double-layered glued wood arch, the internal force transmission path between steel web, bracing bar ear plate and double-layered glued wood arch is clear, stress concentration is avoided, efficient and reliable connection of double-layered glued wood arch and steel web, string bracing bar is realized, and the stiffness and bearing capacity of connection joint area are enhanced by using reinforced wood beam, so that the force transmission is more direct and effective.

Description

Technical Field

[0001] This utility model relates to the field of architectural structure design technology, and in particular to a steel-wood connection node for a large-span tensioned timber arch steel frame composite structure. Background Technology

[0002] With the widespread application of timber structure engineering and the deepening promotion of green and low-carbon building concepts in my country, the demand for the construction of large-span timber structure stadiums has increased significantly. Among them, the large-span tensioned timber arch steel frame composite structure has attracted much attention due to its excellent mechanical properties and economy. The lower chord of this structural system usually adopts tensioned double-layer glued laminated timber arch, while the upper chord, web members, and tensioned struts are steel structures. The nodes need to connect the double-layer glued laminated timber arch, steel web members, and tensioned struts simultaneously, resulting in complex stress paths and extremely high requirements for reliability and load-bearing capacity.

[0003] In existing large-span timber or steel-timber hybrid structural systems, the connection between timber and steel components mainly relies on traditional mechanical connection methods, including the following:

[0004] 1) Steel plate clamping connection: The wooden components are fastened by bolts on both sides of the steel plates;

[0005] 2) Exposed steel hoop connection: Steel hoops are fitted onto the ends of the wooden components and fixed with bolts;

[0006] 3) Embedded steel plate bolt connection: steel plates are pre-embedded in the wooden components and the steel components are connected by bolts.

[0007] However, these traditional connection methods have the following significant drawbacks:

[0008] 1) Insufficient mechanical properties: Stress concentration is prone to occur in the connection area, which weakens the effective cross-section of the wooden component, resulting in a decrease in joint stiffness and load-bearing capacity;

[0009] 2) Structural reliability risk: The force transmission path at the steel-wood interface is not continuous, which may cause loosening or deformation of the joints under long-term load.

[0010] 3) Low construction efficiency: The assembly process of multiple components is complex, and the on-site installation requires high precision, which prolongs the construction period;

[0011] 4) Poor aesthetics: The large number of exposed steel plates and bolts affects the visual effect of the building and makes it difficult to meet the aesthetic requirements of modern architecture.

[0012] Therefore, there is an urgent need for a steel-wood connection node solution that can take into account efficient force transmission, convenient construction, enhanced load-bearing capacity and improved aesthetics, in order to promote the engineering application of large-span tensioned timber arch structures. Utility Model Content

[0013] The purpose of this utility model is to provide a connection node between a large-span double-layer glued laminated timber arch and a steel column. While ensuring clear stress distribution at the node, the node structure is simplified and the amount of on-site welding is reduced, enabling rapid on-site construction of the arch foot of the large-span timber arch.

[0014] The purpose of this utility model is to provide a steel-wood connection node for a large-span tensioned timber arch steel frame composite structure, so as to solve the problems of insufficient mechanical properties, structural reliability risks, low construction efficiency and poor aesthetics of existing steel-wood connection nodes in large-span steel-wood hybrid structures.

[0015] To achieve the above objectives, this utility model provides a steel-timber connection node for a large-span tensioned timber arch steel frame composite structure, including a double-layer glued laminated timber arch, steel web members, node steel box, strut ear plates, and two reinforcing timber beams. The double-layer glued laminated timber arch includes two layers of parallel glued laminated timber arch members with a gap. The node steel box and the reinforcing timber beams are sandwiched between the two layers of glued laminated timber arch members, and the two reinforcing timber beams are located on opposite sides of the node steel box and abut against the node steel box. The steel web members and the strut ear plates are respectively fixed to the upper and lower surfaces of the node steel box.

[0016] Optionally, the node steel box is a closed box-shaped structure.

[0017] Optionally, the outer surfaces of the opposite sides of the node steel box are respectively bonded to the inner surfaces of the two layers of glued laminated timber arch members.

[0018] Optionally, the upper surface of the node steel box is flush with the upper surface of the double-layer glued laminated timber arch.

[0019] Optionally, the node steel box is connected to the double-layer glued laminated timber arch using high-strength bolts.

[0020] Optionally, the reinforced timber beams are connected to the double-layered glued laminated timber arch using self-tapping screws.

[0021] Optionally, the reinforcing timber beam is connected to the two layers of glued laminated timber arch components by a number of first self-tapping screws and a number of second self-tapping screws, and the first self-tapping screws and the second self-tapping screws are staggered.

[0022] Optionally, a plurality of first stiffening plates are provided inside the node steel box along a direction perpendicular to the axis of the double-layer glued laminated timber arch.

[0023] Optionally, a number of second stiffening plates are provided inside the node steel box along a direction parallel to the axis of the double-layer glued laminated timber arch.

[0024] Optionally, the steel web member and the strut lug are welded and fixed to the upper and lower surfaces of the node steel box, respectively.

[0025] This utility model provides a steel-wood connection node for a large-span tensioned timber arch steel frame composite structure, which has at least one of the following beneficial effects:

[0026] 1) By inserting node steel boxes as core connectors into the gaps of the double-layer glued laminated timber arch, the internal force transmission path between the steel web members, strut ear plates and the double-layer glued laminated timber arch is clear, stress concentration is avoided, and efficient and reliable connection between the double-layer glued laminated timber arch and the steel web members and tensioned struts is achieved. Furthermore, the stiffness and load-bearing capacity of the connection node area are enhanced by using reinforced timber beams, making the force transmission more direct and effective.

[0027] 2) The gaps in the glued laminated timber arch were sealed by reinforcing timber beams, which effectively reinforced the connection nodes and improved the stiffness and load-bearing capacity of the connection node area. It is suitable for large-span tensioned timber arch steel frame composite structures. From below, it meets the requirements of architectural aesthetics and is also aesthetically pleasing.

[0028] 3) The entire connection node adopts a modular design, requiring only bolt tightening and a small amount of welding on site, which greatly improves installation efficiency and makes construction more convenient. Attached Figure Description

[0029] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0030] Figure 1 A side view of the steel-wood connection node of a large-span tensioned timber arch steel frame composite structure provided in an embodiment of this utility model;

[0031] Figure 2 for Figure 1 Cross-sectional view along the AA direction;

[0032] Figure 3 for Figure 1 A cross-sectional view along the BB direction.

[0033] in:

[0034] 1-Double-layer glued laminated timber arch; 2-Steel web member; 3-Joint steel box; 4-Strut ear plate; 5-Reinforced timber beam; 6-Bolt; 7-First self-tapping screw; 8-Second self-tapping screw; 9-First stiffening plate; 10-Second stiffening plate. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes that element. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Please refer to Figures 1-3This embodiment provides a steel-timber connection node for a large-span tensioned timber arch steel frame composite structure, including a double-layer glued laminated timber arch 1, steel web members 2, node steel box 3, strut ear plates 4, and two reinforcing timber beams 5. The double-layer glued laminated timber arch 1 includes two layers of parallel glued laminated timber arch members with a gap. The node steel box 3 and the reinforcing timber beams 5 are sandwiched between the two layers of glued laminated timber arch members, and the two reinforcing timber beams 5 are located on opposite sides of the node steel box 3 and abut against the node steel box 3. The steel web members 2 and strut ear plates 4 are respectively fixed to the upper and lower surfaces of the node steel box 3.

[0040] By inserting a node steel box 3 as a core connector into the gap of the double-layer glued laminated timber arch 1, the internal force transmission path between the steel web members 2, the strut ear plates 4 and the double-layer glued laminated timber arch 1 is clear, stress concentration is avoided, and an efficient and reliable connection between the double-layer glued laminated timber arch 1 and the steel web members 2 and the tensioned struts is achieved. Furthermore, the stiffness and load-bearing capacity of the connection node area are enhanced by using a reinforced timber beam 5, making the force transmission more direct and effective.

[0041] Specifically, in this embodiment, the node steel box 3 can be made of welded steel plates to form a closed box-shaped structure. According to the design requirements, welding positions for the steel web members 2 and the strut lugs 4 can be reserved on the upper and lower surfaces of the node steel box 3, respectively. Then, the steel web members 2 and the strut lugs 4 are pre-welded to the node steel box 3 at the design angle in the factory or on the construction site to ensure that the weld quality meets the structural stress requirements. Full penetration welds or high-strength fillet welds can be used. The strut lugs 4 are used for subsequent connection with the struts of the tensioned structure.

[0042] In this embodiment, the outer surfaces of the opposite sides of the node steel box 3 are respectively attached to the inner surfaces of the two layers of glued laminated timber arch members. That is, the cross-sectional width of the node steel box 3 matches the gap between the double-layer glued laminated timber arch 1 to ensure that the outer surfaces of the opposite sides of the node steel box 3 can be completely attached to the inner surfaces of the two layers of glued laminated timber arch members.

[0043] Preferably, the upper surface of the node steel box 3 is flush with the upper surface of the double-layer glued laminated timber arch 1.

[0044] Preferably, the node steel box 3 and the double-layer glued laminated timber arch 1 are connected by high-strength bolts. Several bolt holes are correspondingly provided on the node steel box 3 and the two-layer glued laminated timber arch components, and bolts 6 are passed through these pre-set bolt holes for bolting. High-strength bolts can be used to ensure the shear resistance of the connection node. The diameter of the high-strength bolts is determined based on shear force calculations. This application does not impose any restrictions on the number, type, or distribution of these high-strength bolts.

[0045] In this embodiment, a reinforcing timber beam 5 is also provided in the gap between the two layers of glued laminated timber arch members. The end of the reinforcing timber beam 5 must be tightly pressed against the side of the node steel box 3, and the cross-sectional width of the reinforcing timber beam 5 should match the gap between the two layers of glued laminated timber arch members. The reinforcing timber beam 5 seals the gap between the two layers of glued laminated timber arch 1, effectively reinforcing the connection node, improving the stiffness and load-bearing capacity of the connection node area. It is suitable for large-span tensioned timber arch steel frame composite structures, and meets the architectural aesthetic requirements when viewed from below, thus possessing both aesthetic appeal and structural integrity.

[0046] In this embodiment, the reinforcing timber beam 5 and the double-layer glued laminated timber arch 1 are pressed and fixed by self-tapping screws. The self-tapping screws are evenly distributed along the contact surface between the double-layer glued laminated timber arch 1 and the reinforcing timber beam 5 to ensure that the double-layer glued laminated timber arch 1, the reinforcing timber beam 5 and the node steel box 3 form an integral force-bearing system.

[0047] Preferably, the reinforced timber beam 5 is connected to the two layers of glued laminated timber arch components by a number of first self-tapping screws 7 and a number of second self-tapping screws 8, and the first self-tapping screws 7 and second self-tapping screws 8 are staggered. Figure 3 As shown, the reinforcing timber beam 5 is connected to one of the layers of glued laminated timber arch components by a number of first self-tapping screws 7 arranged side by side, and the reinforcing timber beam 5 is connected to another layer of glued laminated timber arch components by a number of second self-tapping screws 8 arranged side by side. The first self-tapping screws 7 and the second self-tapping screws 8 are staggered. The spacing of the self-tapping screws should ensure that the reinforcing timber beam 5 and the double-layer glued laminated timber arch 1 are subjected to combined forces. This utility model does not impose any restrictions on the number, size and distribution of the first self-tapping screws 7 and the second self-tapping screws 8.

[0048] Preferably, a number of first stiffening plates 9 are provided inside the node steel box 3 along the axis perpendicular to the double-layer glued laminated timber arch 1 to enhance the stiffness of the connection node in the direction of force.

[0049] More preferably, a plurality of second stiffening plates 10 are provided inside the node steel box 3 along a direction parallel to the axis of the double-layer glued laminated timber arch 1 to improve the overall stability and deformation resistance of the connection node. This invention does not impose any restrictions on the number, size, or distribution of the first stiffening plates 9 and the second stiffening plates 10.

[0050] The construction process of the steel-wood connection node of the large-span tensioned timber arch steel frame composite structure provided in this embodiment of the utility model is as follows:

[0051] S1. Prefabricate the node steel box 3, reserve welding positions for the steel web member 2 and the strut ear plate 4 on the upper and lower surfaces of the node steel box 3 respectively, and set stiffening plates and open bolt holes inside the node steel box 3.

[0052] S2. Steel web members 2 and strut ear plates 4 are pre-welded to the upper and lower surfaces of the node steel box 3.

[0053] S3. Clamp the double-layer glued laminated timber arch 1 to the node steel box 3, align the tops, and bolt them together by passing high-strength bolts 6 through the preset bolt holes.

[0054] S4. Insert a reinforcing timber beam 5 into the gap between the two layers of glued laminated timber arch members. Its end must be tightly pressed against the side of the node steel box 3, and self-tapping screws are used to press and fix the two layers of glued laminated timber arch members and the reinforcing timber beam 5 together.

[0055] In summary, this utility model embodiment provides a steel-wood connection node for a large-span tensioned timber arch steel frame composite structure. By inserting a node steel box 3 as a core connector into the gap of the double-layer glued laminated timber arch 1, the internal force transmission path between the steel web members 2, the strut ear plates 4 and the double-layer glued laminated timber arch 1 is clear, avoiding stress concentration. This achieves an efficient and reliable connection between the double-layer glued laminated timber arch 1 and the steel web members 2 and tensioned struts. Furthermore, the use of reinforcing timber beams 5 enhances the stiffness and load-bearing capacity of the connection node area, making force transmission more direct and effective. In addition, the entire connection node adopts a modular design, requiring only bolt tightening and a small amount of welding on site, which greatly improves installation efficiency, makes construction more convenient, and also enhances aesthetics.

[0056] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A steel-wood connection node for a large-span tensioned timber arch steel frame composite structure, characterized in that, The system includes a double-layer glued laminated timber arch, steel web members, node steel boxes, strut lugs, and two reinforcing timber beams. The double-layer glued laminated timber arch comprises two parallel glued laminated timber arch members with a gap between them. The node steel boxes and the reinforcing timber beams are sandwiched between the two layers of glued laminated timber arch members, and the two reinforcing timber beams are located on opposite sides of the node steel boxes and abut against the node steel boxes. The steel web members and the strut lugs are respectively fixed to the upper and lower surfaces of the node steel boxes.

2. The steel-wood connection node of the large-span tensioned timber arch steel frame composite structure as described in claim 1, characterized in that, The node steel box is a closed box-shaped structure.

3. The steel-timber connection node of the large-span tensioned timber arch steel frame composite structure as described in claim 1, characterized in that, The outer surfaces of the opposite sides of the node steel box are respectively attached to the inner surfaces of the two layers of glued laminated timber arch components.

4. The steel-timber connection node of the large-span tensioned timber arch steel frame composite structure as described in claim 1, characterized in that, The upper surface of the node steel box is flush with the upper surface of the double-layer glued laminated timber arch.

5. The steel-timber connection node of the large-span tensioned timber arch steel frame composite structure as described in claim 1, characterized in that, The node steel box is connected to the double-layer glued laminated timber arch using high-strength bolts.

6. The steel-timber connection node of the large-span tensioned timber arch steel frame composite structure as described in claim 1, characterized in that, The reinforced timber beams are connected to the double-layer glued laminated timber arch by self-tapping screws.

7. The steel-timber connection node of the large-span tensioned timber arch steel frame composite structure as described in claim 6, characterized in that, The reinforced timber beams are connected to the two layers of glued laminated timber arch components by a number of first self-tapping screws and a number of second self-tapping screws, and the first self-tapping screws and the second self-tapping screws are staggered.

8. The steel-wood connection node of the large-span tensioned timber arch steel frame composite structure as described in claim 1, characterized in that, Several first stiffening plates are arranged inside the node steel box along the axis perpendicular to the double-layer glued laminated timber arch.

9. The steel-timber connection node of the large-span tensioned timber arch steel frame composite structure as described in claim 8, characterized in that, Several second stiffening plates are arranged inside the node steel box along a direction parallel to the axis of the double-layer glued laminated timber arch.

10. The steel-wood connection node of the large-span tensioned timber arch steel frame composite structure as described in claim 1, characterized in that, The steel web members and the strut lugs are respectively welded and fixed to the upper and lower surfaces of the node steel box.

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