Steel-wood combined truss assembling and supporting device

Abstract

The application provides a steel-wood combined truss assembling and supporting device, and relates to the technical field of building engineering.The device comprises two vertical columns placed on the ground and fixed on the ground, the opposite sides of the two columns are fixedly connected with facade steel frames, steel plates and wood arch beams are fixedly connected between the two columns, one end of the steel plate is connected with the facade steel frame, the wood arch beam is located directly below the steel plate, a plurality of uniformly distributed upper chord steel frames are fixedly connected between the wood arch beam and the steel plate, and a steel cable is fixedly arranged at the bottom of the wood arch beam.The wood arch beam is used as a truss lower chord, upper chord steel frames are arranged between the steel plate and the wood arch beam as web members, a hybrid structure of truss and external prestress is formed, the wood arch beam participates in the overall stress of the truss and directly bears the pre-pressure of the bottom steel cable, after the steel cable is tensioned, a reverse bending moment is applied to the wood arch beam, the tensile stress generated by a part of external loads is offset, and thus the rigidity and bearing capacity of the overall truss are improved.

Description

Technical Field

[0001] This invention relates to the technical field of building engineering, and more specifically, to a steel-wood composite truss assembly and support device. Background Technology

[0002] The prefabricated building industry is developing rapidly. Steel-wood composite trusses, with their dual advantages of high strength and toughness of steel and excellent texture, light weight, and good thermal insulation of wood, are widely used in engineering fields such as large-span buildings, temporary support construction, and landscape architecture. Steel-wood composite structures can complement the performance shortcomings of single materials, balancing structural mechanical performance with environmental and aesthetic characteristics. Compared with pure steel structures, they are less expensive, and compared with pure wood structures, they have better load-bearing capacity, making them valuable for engineering applications and promising for widespread adoption.

[0003] Currently, existing steel-wood composite truss assembly support devices have relatively simple structural designs, mostly employing simple splicing steel-wood composite structures. Conventional trusses rely heavily on rigid connections of members for load-bearing support. Among these, wooden components, as the core load-bearing members, are limited by the inherent material properties of wood, exhibiting low natural tensile strength and anisotropy. Under long-term vertical and external loads, wooden components are prone to tensile stress concentration, leading to cracking, deformation, and other damage. Furthermore, during long-term use, wooden components in existing truss structures are susceptible to irreversible downward deflection due to their own weight, external loads, and environmental factors, reducing not only the overall flatness of the truss but also significantly shortening its service life. Traditional steel-wood composite truss structures are limited in form, mostly using conventional truss load-bearing systems, making it impossible to optimize the load-bearing capacity of wooden components, and the inherent weakness of wood's tensile strength is difficult to compensate for. Under external loads, wooden arch beams experience significant tensile stress, easily leading to breakage and cracking, resulting in insufficient overall truss stiffness and limited load-bearing capacity. Furthermore, existing trusses lack a reverse moment control structure, which cannot offset the adverse stress generated by external loads. As a result, the structure has poor stability and is prone to loosening of members and uneven stress after long-term use. This makes it difficult to meet the requirements of modern building engineering for high stability, high load-bearing capacity and long service life of support devices. Summary of the Invention

[0004] The present invention aims to solve the technical problems of insufficient tensile strength, easy deflection and deformation, poor structural stability and limited load-bearing capacity of wooden components in existing steel-wood composite trusses.

[0005] To address the aforementioned problems, this invention provides a steel-wood composite truss assembly support device, comprising two vertically placed and fixed to the ground. A facade steel frame is fixedly connected to each of the two columns on opposite sides. A steel plate and a wooden arch beam are fixedly connected between the two columns. One end of the steel plate is connected to the facade steel frame. The wooden arch beam is located directly below the steel plate, and several evenly distributed upper chord steel frames are fixedly connected between the wooden arch beam and the steel plate. A steel cable is fixedly installed at the bottom of the wooden arch beam, with a certain distance reserved between the two ends of the steel cable and the two ends of the wooden arch beam.

[0006] The steel-wood composite truss assembly and support device provided by this invention has, but is not limited to, the following beneficial effects compared with the prior art: By installing steel cables at the bottom of the wooden arch beam, a tension force can be applied to the wooden arch beam, thus positioning the arched state of the wooden arch beam and improving the overall stability of the steel-wood composite truss structure. This effectively prevents the wooden arch beam from deflecting due to its own material properties after long-term use, extending the overall service life of the truss. By using the wooden arch beam as the lower chord of the truss, and simultaneously setting an upper chord steel frame as a web member between the upper chord steel plate and the wooden arch beam, a hybrid structure of truss and external prestressing is formed. The wooden arch beam not only participates in the overall stress of the truss but also directly bears the preload of the bottom steel cables. After the steel cables are tensioned, a reverse bending moment is applied to the wooden arch beam, offsetting part of the tensile stress generated by the external load. The original weakness of the wooden arch beam, which is low tensile strength and prone to cracking, is compensated for, and the overall stiffness and load-bearing capacity of the truss are significantly improved.

[0007] Furthermore, the column is a steel pipe filled with concrete.

[0008] Furthermore, several ropes are fixedly connected between the steel cable and the wooden arch beam.

[0009] Furthermore, a groove extends from one side of the column, and one end of the wooden arch beam is fixed in the groove.

[0010] Furthermore, the number of the wooden arch beams is two.

[0011] Furthermore, the wooden arch beam is composed of multiple wooden planks joined together.

[0012] Furthermore, the wooden board is provided with reinforcing ribs.

[0013] Furthermore, T-shaped blocks are fixedly connected between two adjacent wooden boards.

[0014] Furthermore, one end of the steel cable is fixed to the bottom of the T-block.

[0015] Furthermore, a connector is fixedly connected to the middle position of the top of the wooden arch beam, and the bottom of the upper chord steel frame is fixedly connected to the connector. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the structure of A in the middle; Figure 3 For the present invention Figure 1 A schematic diagram of the structure of B in the middle; Figure 4 For the present invention Figure 1 A schematic diagram of the internal structure of C; Figure 5 For the present invention Figure 1 A schematic diagram of the structure of D.

[0017] Explanation of reference numerals in the attached figures: 1. Columns; 2. Facade steel frame; 3. Steel plate; 4. Wooden arch beam; 5. Upper chord steel frame; 6. Steel cable; 7. Cable; 8. T-block; 9. Connector. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application are described clearly and completely below with reference to the accompanying drawings. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," "comprise," etc., in the specification, claims, and accompanying drawings of this application are open-ended terms, indicating that a method comprises one or more steps, or an apparatus comprises one or more elements, but do not exclude the inclusion of other steps or elements. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or primary / secondary relationship. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 application.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0023] See Figure 1 An embodiment of the present invention provides a steel-wood composite truss assembly support device, comprising two vertically placed and fixed on the ground, wherein a facade steel frame 2 is fixedly connected to one side of each of the two columns 1 facing away from each other, and a steel plate 3 and a wooden arch beam 4 are fixedly connected between the two columns 1, one end of the steel plate 3 is connected to the facade steel frame 2, the wooden arch beam 4 is located directly below the steel plate 3, and several evenly distributed upper chord steel frames 5 are fixedly connected between the wooden arch beam 4 and the steel plate 3, and a steel cable 6 is fixedly installed at the bottom of the wooden arch beam 4, with a certain distance reserved between the two ends of the steel cable 6 and the two ends of the wooden arch beam 4.

[0024] In this embodiment, the two ends of the steel plate 3 are respectively fixed to the top of the two columns 1 and extend to one side of the column 1 to connect with the facade steel frame 2. When the steel plate 3 is under pressure in the middle position, the linkage facade steel frame 2 can distribute part of the load to the column 1. The facade steel frame 2 is fixed to the entire side of the column 1, which further improves the uniformity of the stress on the overall structure and avoids damage caused by load concentration.

[0025] This device is neither a simple tensioned beam nor a traditional truss. It uses a wooden arch beam 4 as the lower chord of the truss, and an upper chord steel frame 5 as a web member between the upper chord steel plate 3 and the wooden arch beam 4. The steel cable 6 is a curved arc with its center of curvature facing the wooden arch beam 4, ensuring tension. This, combined with the columns 1 and the facade steel frame 2, forms a stable load-bearing system, ultimately creating a hybrid load-bearing structure combining the truss and external prestressing. In actual use, the wooden arch beam 4 experiences tensile stress under external loads, while the pre-tensioned steel cable 6 continuously provides preload and applies a reverse bending moment to offset some of the tensile stress generated by the external loads. This significantly reduces the actual tensile stress borne by the wooden arch beam 4, compensating for the insufficient natural tensile strength of wood and preventing cracking damage. It also counteracts the downward deflection caused by long-term loads, thereby improving the overall structural stability and load-bearing capacity of the truss.

[0026] Furthermore, in this embodiment, the column 1 is a steel pipe filled with concrete.

[0027] In this embodiment, column 1 is constructed using steel pipes and concrete, combining the mechanical advantages of both materials. Compared to pure steel columns, it has a lower cost, and compared to pure concrete columns, it has higher strength. By pouring concrete, the overall compressive stability of the column is improved, preventing the column from deforming under pressure and ensuring the stability of the support foundation. This effectively enhances the overall support strength and deformation resistance of the device, making it suitable for the stress requirements of large-span support scenarios.

[0028] See Figure 1 Optionally, a number of ropes 7 are fixedly connected between the steel cable 6 and the wooden arch beam 4.

[0029] In this embodiment, the steel cable 6 is fixed to the bottom of the wooden arch beam 4 in sections by the pull rope 7, so as to ensure that the tension force of the steel cable 6 can be evenly transmitted to all parts of the wooden arch beam 4, avoiding the force from being concentrated at both ends, ensuring that the wooden arch beam 4 is subjected to uniform stress, and so that the reverse bending moment generated by the steel cable 6 can evenly offset the tensile stress generated by the external load.

[0030] See Figure 2 Optionally, a groove extends from one side of the column 1, and one end of the wooden arch beam 4 is fixed in the groove.

[0031] In this embodiment, one end of the wooden arch beam 4 is fixed in the groove. The groove limits and fixes the end of the wooden arch beam 4, improving the installation stability of the end of the wooden arch beam 4, preventing displacement of the end of the wooden arch beam 4 during use, and ensuring uniform stress distribution.

[0032] Optionally, the number of the wooden arch beams 4 is two.

[0033] In this embodiment, there are two wooden arch beams 4, which are arranged symmetrically. One end of each wooden arch beam 4 is fixed in the same groove. The two wooden arch beams 4 can work together to bear the load, distribute the force, and further improve the load-bearing capacity of the overall structure. At the same time, it is also convenient to flexibly adjust the assembly scale according to the space and load requirements of the on-site construction, adapt to different construction scenarios, and further adapt to the support requirements of large span and large load.

[0034] Optionally, the wooden arch beam 4 is made of multiple wooden planks spliced ​​together.

[0035] In this embodiment, the wooden arch beam 4 is made up of multiple wooden planks spliced ​​together. Compared with a whole wooden arch beam, the spliced ​​structure is easier to produce, transport and assemble on site, adapts to the processing needs of trusses with different span sizes and reduces construction difficulty.

[0036] See Figure 4 Optionally, the wooden board is provided with reinforcing ribs.

[0037] In this embodiment, the strength of a single wooden board is increased by reinforcing ribs to prevent the board from breaking and deforming, thereby improving the overall structural strength of the wooden arch beam 4.

[0038] See Figure 3 Optionally, a T-shaped block 8 is fixedly connected between two adjacent wooden boards.

[0039] In this embodiment, the T-block 8 is used to position and connect adjacent wooden boards, thereby improving the connection strength at the splicing position and ensuring the continuity of the overall force on the wooden arch beam 4.

[0040] See Figure 3 Optionally, one end of the steel cable 6 is fixed to the bottom of the T-block 8.

[0041] In this embodiment, one end of the steel cable 6 is fixed to the bottom of the T-block 8, and the two sides of the T-block 8 are connected to wooden boards. Therefore, the tension force of the steel cable 6 can be evenly transmitted to the wooden boards on both sides of the T-block 8, avoiding stress concentration and further improving the overall structural stability.

[0042] See Figure 5 Optionally, the top of the wooden arch beam 4 is fixedly connected with several connectors 9, and the bottom of the upper chord steel frame 5 is fixedly connected to the connectors 9.

[0043] In this embodiment, the upper chord steel frame 5 and the wooden arch beam 4 are stably connected by the connector 9, ensuring that the force on the upper chord steel frame 5 can be smoothly transmitted to the wooden arch beam 4, thus ensuring the integrity of the truss structure.

[0044] The working principle of this application includes: Accurately lay out the lines on the ground, pre-embed anchor bolts, pour concrete foundation caps, and vertically hoist the two columns 1 into place. Column 1 is a steel pipe concrete column with concrete poured inside the steel pipe, which is fixed to the foundation with anchor bolts. Then, weld or bolt the facade steel frame 2 to the outside of each column 1. The bottom of the facade steel frame 2 is fixed with additional anchor bolts. The facade steel frame 2 and the column 1 form an L-shaped combined column, which greatly increases the contact area between the column 1 and the foundation and the anti-overturning moment. Even if it is subjected to a large horizontal load, the column 1 will not experience lateral instability. A steel plate 3 and a wooden arch beam 4 are fixedly connected between two columns 1. The two ends of the prefabricated wooden arch beam 4 are inserted into the grooves reserved inside the columns 1, so that the ends of the wooden arch beam 4 are completely constrained and cannot be horizontally displaced or rotated. Connectors 9 are installed at equal intervals along the length of the top of the wooden arch beam 4. Then, the lower end of the upper chord steel frame 5 is connected to the connectors 9 with high-strength bolts. The upper end of the upper chord steel frame 5 is welded or bolted to the bottom surface of the steel plate 3. The two ends of the steel plate 3 are fixed to the top of the two columns 1 and the upper part of the facade steel frame 2, thereby forming a truss skeleton composed of steel plate 3 (upper chord), upper chord steel frame 5 (web member), and wooden arch beam 4 (lower chord). Steel cables 6 are installed at the bottom of the wooden arch beam 4. The two ends of the steel cables 6 are fixed to the bottom of the wooden arch beam 4 at a certain distance from the ends by anchors. The middle section is connected to the bottom surface of the wooden arch beam 4 in sections by several ropes 7. Then, hydraulic jacks are used to tension the steel cables 6 in stages, holding the load for 2 minutes after each stage to check the camber and strain at key points of the wooden arch beam 4. After tensioning to the desired position, the anchors are locked to keep the steel cables 6 in a curved arc shape with the center of the arc pointing towards the wooden arch beam 4. The ropes 7 do more than just prevent the steel cables 6 from swaying. They convert the concentrated anchoring force of the steel cables 6 into a distributed load along the entire length of the wooden arch beam 4, avoiding excessive shear force and local stress concentration at the ends of the wooden arch beam 4 when only anchored at both ends. Simultaneously, the presence of the ropes 7 ensures that the shape of the steel cables 6 remains an arc approximately equidistant from the wooden arch beam 4, guaranteeing the uniformity of the reverse bending moment distribution. Without the ropes 7, the steel cables 6 would sag due to their own weight, weakening the prestressing effect in the middle.

[0045] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A steel-wood composite truss assembly and support device, characterized in that, It includes two vertically placed and fixed on the ground (1), and a facade steel frame (2) is fixedly connected to the opposite side of the two columns (1). A steel plate (3) and a wooden arch beam (4) are fixedly connected between the two columns (1). One end of the steel plate (3) is connected to the facade steel frame (2). The wooden arch beam (4) is located directly below the steel plate (3), and several evenly distributed upper chord steel frames (5) are fixedly connected between the wooden arch beam (4) and the steel plate (3). A steel cable (6) is fixedly installed at the bottom of the wooden arch beam (4), and the two ends of the steel cable (6) are a certain distance away from the two ends of the wooden arch beam (4).

2. A steel-wood composite truss assembly support device according to claim 1, characterized in that, The column (1) is a steel pipe filled with concrete.

3. A steel-wood composite truss assembly support device according to claim 1, characterized in that, Several ropes (7) are fixedly connected between the steel cable (6) and the wooden arch beam (4).

4. A steel-wood composite truss assembly support device according to claim 1, characterized in that, A groove extends from one side of the column (1), and one end of the wooden arch beam (4) is fixed in the groove.

5. The steel-wood composite truss assembling and supporting device according to claim 1, characterized in that, The number of the wooden arch beams (4) is two.

6. A steel-wood composite truss assembly support device according to claim 1, characterized in that, The wooden arch beam (4) is made up of multiple wooden planks spliced ​​together.

7. A steel-wood composite truss assembly support device according to claim 6, characterized in that, The wooden board is equipped with reinforcing ribs.

8. A steel-wood composite truss assembly support device according to claim 7, characterized in that, A T-shaped block (8) is fixedly connected between two adjacent wooden boards.

9. A steel-wood composite truss assembly support device according to claim 8, characterized in that, One end of the steel cable (6) is fixed to the bottom of the T-block (8).

10. The steel-wood composite truss assembly support device according to claim 1, characterized in that, A connector (9) is fixedly connected to the middle position of the top of the wooden arch beam (4), and the bottom of the upper chord steel frame (5) is fixedly connected to the connector (9).

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