Fabricated steel-wood composite beam and manufacturing method thereof

Abstract

The invention discloses an assembly type steel-wood composite beam and a manufacturing method thereof, and relates to the technical field of civil engineering structures, the assembly type steel-wood composite beam comprises a web plate, end plates are fixedly welded to the two ends of the web plate, and H-shaped steel is fixedly welded to the sides, away from the web plate, of the end plates, and the assembly type steel-wood composite beam is characterized in that wood beams are detachably installed on the two sides of the web plate; the two ends of the wood beam are detachably connected with the corresponding end plates respectively, a pull strip is embedded in the wood beam in the length direction, and the pull strip is connected with the end plates, the manufacturing process of the composite beam is simplified, the combination efficiency is improved, and the welding workload is reduced.

Description

Technical Field

[0001] This invention relates to the field of civil engineering structural technology, and in particular to a prefabricated steel-wood composite beam and its manufacturing method. Background Technology

[0002] Timber and steel are currently the most ideal prefabricated building materials, allowing for factory processing and on-site assembly. This saves manpower and resources, shortens the construction cycle, reduces environmental pollution from construction, and improves labor productivity and construction quality. Steel is lightweight, has high compressive and tensile strength, and good seismic performance; however, it is prone to overall or local instability during use, resulting in insufficient utilization of its strength. Timber has high compressive strength, but its tensile strength is relatively low. When timber beams are subjected to bending, brittle fracture can occur at defects on the tension side, further hindering the full utilization of the timber's compressive strength.

[0003] Steel-wood composite structures are a novel structural form. Through the rational combination of these two materials, the superior properties of both wood and steel can be fully utilized, effectively avoiding the instability of steel and the brittle fracture of wood. Currently, some research has been conducted on steel-wood composite structures both domestically and internationally. A utility model patent with publication number CN208934252U discloses a steel-wood composite beam structure, comprising an inverted T-beam, a left and right web plank symmetrically connected to both sides of the web of the inverted T-beam, a lower flange plank connected to the bottom surface of the flange plate of the inverted T-beam, and angular connectors symmetrically connected to the left and right web planks; the angular connectors include a horizontal plate and an inclined plate; in use, the web planks are fixedly connected to the inverted T-beam, the angular connectors are fixedly installed on the left and right web planks, and right-angle connectors are fixedly installed on the bottom surfaces of both ends of the lower flange plank; This utility model can make full use of the stress performance characteristics of steel and wood. It can be effectively connected with the column below through right-angle connectors, while the angle connectors support the upper structure, effectively improving the integrity and load-bearing capacity of the composite beam. In addition, each component can be prefabricated and assembled, which is convenient for construction and saves time. The aforementioned patent combines steel and wood through an effective structure, improving the load-bearing capacity and stiffness of the composite components. However, both also expose the same problem: the composite beam uses a large amount of steel, requires a lot of welding work, and is complex to process. The increased welding work will cause the steel beam to deform due to the heat generated during welding, which will increase the workload of subsequent correction.

[0004] Therefore, there is an urgent need for a prefabricated steel-wood composite beam and its manufacturing method, which can simplify the processing procedures and welding workload of the composite beam. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a prefabricated steel-wood composite beam and its manufacturing method, which solves the problem of large processing and welding workload in existing composite beams.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A prefabricated steel-wood composite beam includes a web, with end plates welded to both ends of the web, and an H-beam welded to the side of the end plate away from the web. Two wooden beams are detachably installed on the web, with both ends of the wooden beams detachably connected to the corresponding end plates. Tie rods are embedded in the wooden beams along their length, and the tie rods are connected to the end plates.

[0007] Furthermore, the tie rod includes a flat portion and an arched portion, and a receiving groove is formed on the wooden beam corresponding to the position of the tie rod. When the tie rod is placed in the receiving groove, the flat portion is coplanar with the outer wall of the wooden beam.

[0008] Furthermore, the first fixed shell has connecting ears on both sides, and a pull rod is rotatably mounted on the connecting ears. The second fixed shell has a locking nut at the position corresponding to the pull rod, and the pull rod and the locking nut are connected by bolts.

[0009] Furthermore, the pull bar also includes a connecting part, which is perpendicular to the opening direction of the receiving groove. The connecting part has a threaded hole, and the connecting part is connected to the end plate through the threaded hole.

[0010] Furthermore, the pull bar has through holes in the planar portion and the arched portion, and a screw is installed in the through holes.

[0011] Furthermore, the wooden beam has slots equidistantly spaced on one side, and the web plate has a support plate welded to the position corresponding to the slot, with the support plate placed in the slot.

[0012] Furthermore, both ends of the wooden beam are provided with connecting holes, and connecting pipes are provided in the connecting holes. The inner wall of the connecting pipes is threaded, and the end plate is threadedly connected to the connecting pipes.

[0013] Furthermore, the pull bar is provided with a sleeve at the position of the through hole.

[0014] Furthermore, the number of connecting holes is three, and the three connecting holes are arranged in an isosceles triangle.

[0015] A method for manufacturing prefabricated steel-wood composite beams includes the following steps: S1. First, holes for the screw to pass through are made at equal intervals along the thickness direction on the web plate. S2. Drill holes at the positions corresponding to the threaded holes and connecting holes on the end plate; S3. Weld end plates as described in S2 to both ends of the web plate described in S1, and perform flaw detection on the weld and adjust the angle between the web plate and the end plates. S4. Weld H-beams to one side of the end plate described in S3 to form the skeleton of the composite beam; S5. A receiving groove is made on the wooden beam, and the tie rod is embedded in the receiving groove to ensure that the connecting part is embedded in the end of the wooden beam; S6. Attach the wooden beam as described in S5 to both sides of the web, place the support plate in the slot and fix it with screws; S7. Use threaded holes and connecting holes to bolt the wooden beam to the end plate.

[0016] In summary, the beneficial technical effects of the present invention are as follows: This invention simplifies the entire composite beam manufacturing process by detachably installing wooden beams on both sides of the web, with each end of the wooden beam detachably connected to a corresponding end plate, and embedding tie rods along the length of the wooden beams, which are connected to the end plates. This improves manufacturing efficiency, reduces welding workload, and avoids post-weld corrections. Furthermore, embedding the tie rods within the wooden beams not only increases the overall strength of the beams but also avoids the technical challenge of drilling holes along the length of the wooden beams.

[0017] The flat portion on the tie rod not only serves as a screw washer, but also acts as a reinforcing rib due to its continuity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the web and its related structures; Figure 3 This is a structural diagram of a wooden beam; Figure 4 This is a schematic diagram of the tension strip structure; Figure 5 This is an exploded diagram of the wooden beams and tie rods.

[0019] Reference numerals: 1. Web plate; 2. Timber beam; 3. End plate; 4. Support plate; 5. H-beam; 6. Tie rod; 7. Flat part; 8. Arched part; 9. First through hole; 10. Second through hole; 11. Receiving groove; 12. Connecting part; 13. Threaded hole; 14. Sleeve; 15. Connecting pipe; 16. First mounting hole; 17. Second mounting hole; 18. Slot; 19. T-shaped clamp; 20. Screw; 21. T-shaped opening. Detailed Implementation

[0020] The present invention will now be clearly and completely described in conjunction with embodiments.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] In the description of the embodiments, unless otherwise explicitly specified and limited, the terms "set," "connect," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1

[0024] See appendix Figure 1-5 The image shows a prefabricated steel-wood composite beam, including a web plate 1, wherein several second through holes 10 are equally spaced on the web plate 1, and end plates 3 are vertically welded to both ends of the web plate 1. First mounting holes 16 are respectively opened at both ends of the end plates 3, and three second mounting holes 17 are opened in an isosceles triangle between the two first mounting holes 16. An H-beam 5 is welded to the other side of the end plates 3. Several support plates 4 are welded at equal intervals on one side of the web plate 1; Two wooden beams 2 are symmetrically arranged on both sides of the web plate 1. The wooden beams 2 have a receiving groove 11 along the length direction. A tie rod 6 is embedded in the receiving groove 11. The tie rod 6 includes a flat part 7 and an arched part 8. During assembly, the tie rod 6 is placed in the receiving groove 11. At this time, the flat part 7 is flush with the outer wall of the wooden beam 2. A first through hole 9 is opened at the position of the tie rod 6 corresponding to the second through hole 10. A slot 18 is opened at the position of the wooden beam 2 corresponding to the support plate 4. During assembly, the wooden beam 2 is fitted to the support plate 4 through the slot 18 and attached to both sides of the web plate 1. At this time, the first through hole and the second through hole 10 are concentric. Then, the screw 20 is passed through the first through hole 9 and the second through hole 10 to realize the bolt connection. At this time, the connection between the wooden beam 2 and the web plate 1 is completed. In addition, the flat part 7 on the tie rod 6 can provide a washer for the connection of the screw 20, increasing the contact area between the nut and the wooden beam 2 and making the force more even. At the same time, the arched part 8 on the tie rod 6 increases the structural strength of the tie rod 6, especially reducing the downward deflection when the wooden beam 2 is subjected to downward pressure. The tie rod 6 has a connecting part 12 at both ends, and a T-shaped clip 19 is provided on the inner side of the connecting part 12. Correspondingly, a T-shaped opening 21 is opened on the wooden beam 2 at the position corresponding to the T-shaped clip 19. A threaded hole 13 is opened on the connecting part 12 at the position corresponding to the T-shaped clip 19. During assembly, when the tie rod 6 is placed in the receiving groove 11, the threaded hole 13 is concentric with the first mounting hole 16, and the end plate 3 is connected to the tie rod 6 by bolts, so that the force on the H-beam 5 is more evenly distributed to the tie rod 6 and the wooden beam 2. Furthermore, connecting holes are provided at both ends of the wooden beam 2 corresponding to the positions of the second mounting holes 17. Connecting pipes 15 with internal threads are installed in the connecting holes. During assembly, the wooden beam 2 is attached to both sides of the web plate 1 through the cooperation of the support plate 4 and the slot 18. At this time, the connecting pipe 15 is concentric with the second mounting hole 17. Then, the end plate 3 is connected to the wooden beam 2 by bolts. In this way, the end plate 3 is connected to the tie rod 6 and the wooden beam 2 by bolts, which improves the integrity of the entire composite beam and reduces the amount of welding work, making the assembly simpler and more efficient. Furthermore, in order to facilitate the smooth insertion of the screw 20 between the first through hole 9 and the second through hole 10 and to prevent the wooden beam 2 from undergoing large deformation under the tension of the screw 20, a sleeve 14 is provided at the position of the tie rod 6 in the first through hole 9. When the tie rod 6 is placed in the receiving groove 11, one end of the sleeve 14 is exactly abutted against the web plate 1, thus providing support for the wooden beam 2 through the sleeve 14.

[0025] Example 2

[0026] A method for manufacturing prefabricated steel-wood composite beams includes the following steps: S1. First, holes for the screw 20 to pass through are made at equal intervals along the thickness direction on the web 1; S2. Make holes at the positions of threaded hole 13 and connecting hole on end plate 3; S3. Weld end plates 3 as described in S2 to both ends of the web 1 described in S1, and perform flaw detection on the weld and adjust the angle between the web 1 and the end plates 3. S4. Weld H-beam 5 to one side of the end plate 3 described in S3; S5. A receiving groove 11 is opened on the wooden beam 2, and the tie rod 6 is embedded in the receiving groove 11 to ensure that the connecting part 12 is embedded in the end of the wooden beam 2. S6. As described in S5, attach the wooden beam 2 to both sides of the web plate 1, place the support plate 4 in the slot 18 and fix it with the screw 20. S7. Use the threaded hole 13 and the connecting hole to realize the bolt connection between the wooden beam 2 and the end plate 3.

[0027] The assembly steps of the present invention are as follows: during assembly, the web plate 1 is first obtained by plasma or laser cutting machine, and second through holes 10 are opened at equal intervals on the web plate 1. Then, the first mounting hole 16 and the second mounting hole 17 are opened at the corresponding positions of the end plate 3. Then, the end plates 3 are welded to both ends of the web plate 1, and the angle between the web plate 1 and the end plate 3 is corrected so that the angle between the two is 90 degrees. Next, H-beams 5 are welded to one side of the end plate 3 to form the frame of the composite beam. Then, the frame of the composite beam is sandblasted and rusted in a shot blasting machine to form a wear-resistant and anti-slip layer on the outer surface of the frame. Next, according to the length of the web 1, the same length of the wooden beam 2 is processed, and the receiving groove 11 and the hole for threading the screw 20 are opened at the corresponding position. The connecting pipe 15 is fixed in the connecting hole. Then the tie rod 6 is placed in the receiving groove 11, and the T-shaped clip 19 is inserted into the T-shaped opening 21. Next, the wooden beam 2 with tie rod 6 is attached to both sides of the web plate 1 through the groove 18 and the bracket 4. At this time, the threaded hole 13, the connecting hole and the corresponding first mounting hole 16 and second mounting hole 17 are concentric. Then, the screw 20 is passed through the first through hole 9 and the second through hole 10 to connect the web plate 1 and the wooden beam 2 into a whole. Finally, the threaded hole 13 and the connecting pipe 15 are connected by bolts.

[0028] It should be noted that, in order to improve the sturdiness of the tie rod 6, connecting pipe 15 and wooden beam 2, HY-106AB high-temperature metal adhesive can be applied to the outer wall of the tie rod 6 and connecting pipe 15 when installing them, and then bolts can be used for connection.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated steel-wood composite beam, comprising a web plate (1), end plates (3) welded at both ends of the web plate (1), and H-shaped steel (5) welded at a side of the end plate (3) away from the web plate (1), characterized in that wood beams (2) are detachably mounted on both sides of the web plate (1), both ends of the wood beam (2) are detachably connected with the corresponding end plate (3), and a bracing bar (6) is embedded in the wood beam (2) along the length direction.

2. The fabricated steel-wood composite beam according to claim 1, wherein: The bracing bar (6) comprises a flat portion (7) and an arched portion (8), the wood beam (2) is provided with a receiving groove (11) corresponding to the position of the bracing bar (6), and the flat portion (7) is coplanar with the outer wall of the wood beam (2) after the bracing bar (6) is placed in the receiving groove (11).

3. The fabricated steel-wood composite beam according to claim 2, wherein: The bracing bar (6) further comprises a connecting portion (12) perpendicular to the opening direction of the receiving groove (11), the connecting portion (12) is provided with a threaded hole (13), and the connecting portion (12) is connected with the end plate (3) through the threaded hole (13).

4. The fabricated steel-wood composite beam according to claim 2, wherein: The bracing bar (6) is provided with a first through hole (9) penetrating through the flat portion (7) and the arched portion (8), and the first through hole (9) is provided with a screw rod (20).

5. The fabricated steel-wood composite beam according to claim 1, wherein: The wood beam (2) is provided with a clamping groove (18) at a side thereof, the web plate (1) is welded with a supporting plate (4) corresponding to the position of the clamping groove (18), and the supporting plate (4) is placed in the clamping groove (18).

6. The fabricated steel-wood composite beam of claim 1, wherein: Both ends of the wood beam (2) are provided with a connecting hole, the connecting hole is provided with a connecting pipe (15), the inner wall of the connecting pipe (15) is threaded, and the end plate (3) is threadedly connected with the connecting pipe (15).

7. The fabricated steel-wood composite beam according to claim 4, wherein: The bracing bar (6) is provided with a sleeve pipe (14) at the position of the first through hole (9).

8. The fabricated steel-wood composite beam according to claim 6, wherein: The number of the connecting holes is three, and the three connecting holes are arranged in an isosceles triangle shape.

9. A method for manufacturing a fabricated steel-wood composite beam according to any one of claims 1-8, characterized in that: The method comprises the following steps: S1, a second through hole (10) through which the screw rod (20) passes is opened on the web plate (1) along the thickness direction; S2, a first mounting hole (16) and a second mounting hole (17) are opened on the end plate (3) corresponding to the threaded hole (13) and the connecting hole; S3, the end plate (3) is welded at both ends of the web plate (1) as described in S1, and the welding seam is detected and the angle between the web plate (1) and the end plate (3) is adjusted; S4, the H-shaped steel (5) is welded at one side of the end plate (3) as described in S3; S5, the receiving groove (11) is opened on the wood beam (2), the bracing bar (6) is embedded in the receiving groove (11), the connecting portion (12) is embedded in the end portion of the wood beam (2), and the connecting pipe (15) is fixed in the connecting hole; S6, the wood beam (2) as described in S5 is attached to both sides of the web plate (1), the supporting plate (4) is placed in the clamping groove (18), and the screw rod (20) is fixed; S7, the wood beam (2) and the end plate (3) are bolted through the threaded hole (13) and the connecting hole.

Images