Composite steel beam structure

Abstract

This invention relates to the field of steel beam structure technology, and discloses a composite steel beam structure, including a floor slab, steel beams, a first continuous beam, and a second continuous beam. The floor slab connects the first and second continuous beams. The first continuous beam is provided with a first support unit, and the second continuous beam is provided with a second support unit. The steel beam has a movable end and a rotating end. The movable end is movably installed on the first support unit, and the rotating end is rotatably installed on the second support unit. The floor slab is provided with a crack-resistant curb, and an elastic pad is provided on the lower surface of the floor slab. Its advantages are: the movable end, movably installed on the first support unit, releases the bending deformation of the steel beam by sliding along its length, thereby improving the stress performance of the steel beam; the crack-resistant curb can release the tensile stress of the floor slab; the rotating end, rotatably installed on the second support unit, undergoes slight rotation to adapt to the effects of bending deformation of the steel beam; the elastic pad can disperse the pressure from the rotating end, preventing the rotating end from cracking the floor slab.

Description

Technical Field

[0001] This invention relates to the field of steel beam structure technology, and in particular to a composite steel beam structure. Background Technology

[0002] For areas with large spans and heavy loads, the load-bearing structure generally adopts prestressed concrete beams, steel trusses, or composite steel beam structures formed by steel beams and composite floor slabs. Among these, composite steel beam structures are widely used due to their advantages such as high material utilization, small cross-sectional height, and convenient construction.

[0003] In related technologies, composite steel beam structures experience significant negative bending moments at their ends under the influence of floor slabs. For large-span, heavy-load composite steel beam structures, these negative bending moments are amplified, impacting the floor slab above and causing cracking, thus affecting the safety and durability of the composite steel beam structure. Due to the large span and heavy load, the steel beams also accumulate significant compressive deformation. Through the pinning action of the studs, this compressive deformation is transmitted to the floor slab via the upper flange of the steel beam, and then further transferred to other parts of the floor slab in a tensile manner, generating significant tensile stress at these locations, further affecting the safety and durability of the composite steel beam structure. Summary of the Invention

[0004] The technical problem to be solved by this invention is that existing composite steel beam structures have poor safety and low durability.

[0005] To address the aforementioned technical problems, this invention provides a composite steel beam structure, comprising a floor slab, steel beams, a first continuous beam, and a second continuous beam. The floor slab connects the first continuous beam and the second continuous beam. The first continuous beam is provided with a first support unit, and the second continuous beam is provided with a second support unit. The steel beam is located below the floor slab and has a movable end and a rotating end. The movable end is installed on the first support unit and can slide along the length of the steel beam and rotate around the first support unit. The rotating end is rotatably installed on the second support unit. The floor slab is provided with a crack-resistant curb, which is located close to the first support unit. An elastic pad is provided on the lower surface of the floor slab, and the elastic pad is located above the rotating end.

[0006] In the above technical solution, the first support unit includes a first beam support and a first support. The first beam support is installed on the first continuous beam, the first support is installed on the first beam support, and the movable end is installed on the first support. The movable end is rotatable around the first support.

[0007] In the above technical solution, the first support is provided with first limiting grooves on both sides along the length direction of the steel beam, the lower surface of the steel beam is provided with a first cover plate, and the two sides of the first cover plate are provided with first limiting parts, the two first limiting parts extend into the two first limiting grooves respectively, and there is a first interval between the first limiting parts and the first limiting grooves.

[0008] In the above technical solution, the first support has a central axis, and one side wall of the anti-crack countersunk is farther away from the first continuous beam than the central axis.

[0009] In the above technical solution, the second support unit includes a second beam support and a second support. The second beam support is installed on the second continuous beam, the second support is installed on the second beam support, and the rotating end is rotatably installed on the second support.

[0010] In the above technical solution, the second support is provided with a second limiting groove that is connected end to end. The second limiting groove extends circumferentially along the second support. The lower surface of the steel beam is provided with a second cover plate. The second cover plate is provided with a support ring. The end of the support ring away from the second cover plate is provided with a second limiting part that is connected end to end. The second limiting part extends radially inward along the support ring and extends into the second limiting groove. There is a second gap between the second limiting part and the second limiting groove.

[0011] In the above technical solution, the first continuous beam is provided with a connecting plate, and the movable end can be connected to the connecting plate.

[0012] In the above technical solution, a receiving groove is provided on the lower surface of the floor slab, and the elastic pad is disposed in the receiving groove.

[0013] In the above technical solution, the movable end is provided with first reinforcing ribs at intervals on both sides along the length direction of the steel beam.

[0014] In the above technical solution, the rotating end is provided with second reinforcing ribs at intervals on both sides along the length direction of the steel beam.

[0015] Compared with the prior art, the combined steel beam structure of this invention has the following advantages: the movable end is movably installed on the first support unit, which can release the bending deformation of the steel beam by sliding along the length of the steel beam after the floor slab is loaded, thereby improving the stress performance of the steel beam. During the sliding process, a slight rotation occurs to adapt to the impact of the steel beam recovering from bending deformation. The anti-crack countersunk can generate corresponding deformation at the movable end while releasing the deformation of the steel beam, which can release the tensile stress generated by the negative bending moment of the floor slab and avoid floor slab cracking. The rotating end is rotatably installed on the second support unit, which can undergo a slight rotation to adapt to the impact of the steel beam recovering from bending deformation. When the rotating end undergoes a slight rotation, it tilts upward and can abut against the elastic pad layer above it to disperse the pressure from the rotating end and prevent the rotating end from cracking the floor slab. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the combined steel beam structure of this invention applied to a basement;

[0017] Figure 2 yes Figure 1 Partial sectional view along the AA direction;

[0018] Figure 3 yes Figure 2 Cross-sectional view along direction 1-1;

[0019] Figure 4 yes Figure 1 Partial sectional view along the middle BB direction;

[0020] Figure 5 yes Figure 4 Cross-sectional view along direction 2-2;

[0021] In the diagram, 1 is the floor slab; 11 is the elastic cushion layer; and 12 is the crack-resistant retaining wall.

[0022] 2. Steel beam; 21. First cover plate; 211. First limiting part; 22. Second cover plate; 221. Support ring; 222. Second limiting part; 23. Second reinforcing rib; 24. First reinforcing rib;

[0023] 3. First continuous beam; 31. First support unit; 311. First beam support; 312. First bearing; 32. Connecting plate;

[0024] 4. Second continuous beam; 41. Second support unit; 411. Second beam support; 412. Second support. Detailed Implementation

[0025] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0026] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., used in this invention to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 limiting this invention.

[0027] In the description of this invention, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a preferred embodiment of the present invention provides a combined steel beam structure including a floor slab 1, a steel beam 2, a first continuous beam 3, and a second continuous beam 4. The floor slab 1 connects the first continuous beam 3 and the second continuous beam 4. The first continuous beam 3 is provided with a first support unit 31, and the second continuous beam 4 is provided with a second support unit 41. The steel beam 2 is located below the floor slab 1 and has a movable end and a rotating end. The movable end is installed on the first support unit 31 and can slide along the length of the steel beam 2 and rotate around the first support unit 31. The rotating end is rotatably installed on the second support unit 41. The floor slab 1 is provided with a crack-resistant retaining wall 12, which is located close to the first support unit 31. An elastic pad 11 is provided on the lower surface of the floor slab 1, and the elastic pad 11 is located above the rotating end.

[0029] Understandably, the movable end is movably installed on the first support unit 31. After the floor slab 1 is loaded, it can release the bending deformation of the steel beam 2 by sliding along the length of the steel beam 2 to improve the stress performance of the steel beam 2. During the sliding process, it will undergo a slight rotation to adapt to the impact of the steel beam 2 recovering from the bending deformation. The anti-crack countersunk 12 can generate corresponding deformation at the movable end while releasing the deformation of the steel beam 2, which can release the tensile stress generated by the negative bending moment of the floor slab 1 to avoid cracking of the floor slab 1. The rotating end is rotatably installed on the second support unit 41. It can undergo a slight rotation to adapt to the impact of the steel beam 2 recovering from the bending deformation. When the rotating end undergoes a slight rotation, it tilts upward and can abut against the elastic pad layer 11 located above it to prevent the rotating end from cracking the floor slab 1.

[0030] Preferably, the reinforcing bars are processed into triangular steel trusses in the factory and connected with the bottom formwork to form floor slab 1. The bottom formwork is made of galvanized steel plate.

[0031] Preferably, the elastic pad 11 is a compressible polystyrene board.

[0032] Preferably, if the flange width of the steel beam 2 is too wide, making it difficult to construct the welding support or connecting plate 32, the flange can be narrowed within the support area at a slope of 1:2.5 to facilitate welding.

[0033] Preferably, the first continuous beam 3 and the second continuous beam 4 are arranged in parallel.

[0034] Furthermore, such as Figure 1 , Figure 4 and Figure 5 The first support unit 31 includes a first beam support 311 and a first support 312. The first beam support 311 is installed on the first continuous beam 3, and the first support 312 is installed on the first beam support 311. The movable end is installed on the first support 312, and the movable end can slide along the length direction of the steel beam 2 and rotate around the first support 312.

[0035] Understandably, the first beam support 311 supports the first bearing 312, allowing the movable end to release the bending deformation of the steel beam 2 by sliding along its length, thereby improving the stress performance of the steel beam 2. During the sliding process, a slight rotation occurs to accommodate the effects of the steel beam 2 recovering from bending deformation. Simultaneously, the sliding and rotation of the movable end prevents the first beam support 311 from cracking under the compressive deformation of the steel beam 2 and the tensile stress of the floor slab 1.

[0036] Preferably, the first beam support 311 is disposed on the side of the first continuous beam 3 facing the second continuous beam 4, and the cross-sectional area of ​​the first beam support 311 is equal everywhere along the height direction.

[0037] Furthermore, such as Figure 1 , Figure 4 and Figure 5 As shown, the first support 312 has first limiting grooves on both sides along the length of the steel beam 2. The lower surface of the steel beam 2 is provided with a first cover plate 21. The two sides of the first cover plate 21 are provided with first limiting parts 211. The two first limiting parts 211 extend into the two first limiting grooves respectively. There is a first gap between the first limiting parts 211 and the first limiting grooves.

[0038] It is understandable that the first support 312 has first limiting grooves on both sides along the length of the steel beam 2. After the first limiting part 211 extends into the corresponding first limiting groove, the movement of the movable end of the steel beam 2 in the horizontal plane perpendicular to the length of the steel beam 2 is greatly restricted. The steel beam 2 cannot be removed from the first support 312 in this direction or in the vertical direction. The first limiting part 211 and the first limiting groove have a first gap, which allows the movable end to rotate slightly to adapt to the influence brought about by the steel beam 2 recovering from bending deformation.

[0039] Furthermore, such as Figure 4 As shown, the first support 312 has a central axis. One side wall of the anti-crack countersunk 12 is farther away from the first continuous beam 3 than the central axis, which can prevent the upward tilting of the movable end from having an adverse effect on the side wall.

[0040] For example, the first support 312 is a cylindrical structure, and the central axis is the line connecting the centers of the upper and lower base circles of the first support 312.

[0041] Furthermore, such as Figure 1 , Figure 2 and Figure 3 As shown, the second support unit 41 includes a second beam support 411 and a second support 412. The second beam support 411 is installed on the second continuous beam 4, the second support 412 is installed on the second beam support 411, and the rotating end is rotatably installed on the second support 412.

[0042] Understandably, the second beam support 411 supports the second support 412, allowing the rotating end to rotate slightly on the second support 412 to accommodate the effects of the steel beam 2 recovering from bending deformation.

[0043] Preferably, the second beam support 411 is disposed on the side of the second continuous beam 4 facing the first continuous beam 3.

[0044] Furthermore, such as Figure 1 , Figure 2 and Figure 3As shown, the second support 412 has a second limiting groove that is connected end to end. The second limiting groove extends along the circumference of the second support 412. The lower surface of the steel beam 2 is provided with a second cover plate 22. The second cover plate 22 is provided with a support ring 221. The end of the support ring 221 away from the second cover plate 22 is provided with a second limiting part 222 that is connected end to end. The second limiting part 222 extends radially inward along the support ring 221 and extends into the second limiting groove.

[0045] It is understandable that the second support 412 has a second limiting groove that connects end to end. The second limiting groove extends along the circumference of the second support 412. After the second limiting part 222 extends into the second limiting groove, the movement of the movable end of the steel beam 2 in the horizontal direction is greatly restricted. The steel beam 2 cannot be removed from the first support 312 in the horizontal and vertical directions. The first limiting part 211 and the first limiting groove have a second gap, which allows the rotating end to rotate slightly to adapt to the influence brought about by the steel beam 2 recovering from bending deformation.

[0046] Furthermore, such as Figure 4 As shown, the first continuous beam 3 is provided with a connecting plate 32, and the movable end can be connected to the connecting plate 32.

[0047] It is understandable that welding the movable end to the web of steel beam 2 can enhance the integrity of the sliding end and the first continuous beam 3.

[0048] Furthermore, such as Figure 2 As shown, a receiving groove is provided on the lower surface of the floor slab 1, and the elastic pad 11 is disposed in the receiving groove.

[0049] Understandably, the receiving groove can prevent the rotating end from directly exerting pressure on the floor slab 1 and cracking it when it tilts upward. The elastic pad 11 is set in the receiving groove and plays a role in dispersing pressure when the floor slab 1 comes into contact with it, thus preventing the rotating end from tilting upward and cracking the floor slab 1.

[0050] Furthermore, such as Figure 4 As shown, first reinforcing ribs 24 are provided at intervals on both sides of the movable end along the length of the steel beam 2. It can be understood that the first reinforcing ribs 24 can transmit concentrated forces and the vertical component forces of the flanges of the steel beam 2.

[0051] Furthermore, such as Figure 2 As shown, second reinforcing ribs 23 are provided at intervals on both sides of the rotating end along the length of the steel beam 2. It can be understood that the first reinforcing ribs 24 can transmit concentrated forces and vertical components of forces on the upper and lower sides of the steel beam 2.

[0052] The working process of this invention is as follows: apply a preset load to the floor slab 1 to displace the sliding end to a suitable position; weld the steel beam 2 and the upper flange of the steel beam 2 with studs; pour the floor slab 1; weld the first support 312 and the movable end; weld the second support 412 and the rotating end; cover with soil; weld the web of the steel beam 2 and the connecting plate 32.

[0053] In summary, this embodiment of the invention provides a combined steel beam structure, in which the movable end is movably installed on the first support unit 31. After the floor slab 1 is loaded, the bending deformation of the steel beam 2 can be released by sliding along the length direction of the steel beam 2 to improve the stress performance of the steel beam 2. During the sliding process, a slight rotation occurs to adapt to the impact of the steel beam 2 recovering from the bending deformation. The anti-crack counterweight 12 can generate corresponding deformation at the movable end while releasing the deformation of the steel beam 2, which can release the tensile stress generated by the negative bending moment in the floor slab 1 to prevent the floor slab 1 from cracking. The rotating end is rotatably installed on the second support unit 41 and can undergo a slight rotation to adapt to the impact of the steel beam 2 recovering from the bending deformation. When the rotating end undergoes a slight rotation, it tilts upward and can abut against the elastic pad layer 11 located above it to prevent the rotating end from cracking the floor slab 1.

[0054] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A composite steel beam structure, characterized in that, The system includes a floor slab, steel beams, a first continuous beam, and a second continuous beam. The floor slab connects the first continuous beam and the second continuous beam. The first continuous beam is provided with a first support unit, and the second continuous beam is provided with a second support unit. The steel beam is located below the floor slab and has a movable end and a rotating end. The movable end is installed on the first support unit and can slide along the length of the steel beam and rotate around the first support unit. The rotating end is rotatably installed on the second support unit. The floor slab is provided with a crack-resistant curb, which is located close to the first support unit. The lower surface of the floor slab is provided with an elastic pad, which is located above the rotating end. The first support unit includes a first beam support and a first support. The first beam support is installed on the first continuous beam, the first support is installed on the first beam support, and the movable end is installed on the first support. The movable end is rotatable around the first support. The second support unit includes a second beam support and a second support. The second beam support is installed on the second continuous beam, the second support is installed on the second beam support, and the rotating end is rotatably installed on the second support. The first support has first limiting grooves on both sides along the length of the steel beam. The lower surface of the steel beam is provided with a first cover plate. The two sides of the first cover plate are provided with first limiting parts. The two first limiting parts extend into the two first limiting grooves respectively. There is a first gap between the first limiting parts and the first limiting grooves.

2. The composite steel beam structure according to claim 1, characterized in that, The first support has a central axis, and one side wall of the anti-crack countersunk is farther away from the first continuous beam than the central axis.

3. The composite steel beam structure according to claim 1, characterized in that, The second support has a second limiting groove that connects end to end. The second limiting groove extends circumferentially along the second support. The lower surface of the steel beam is provided with a second cover plate. The second cover plate is provided with a support ring. The end of the support ring away from the second cover plate is provided with a second limiting part that connects end to end. The second limiting part extends radially inward along the support ring and extends into the second limiting groove. There is a second gap between the second limiting part and the second limiting groove.

4. The composite steel beam structure according to claim 1, characterized in that, The first continuous beam is provided with a connecting plate, and the movable end can be connected to the connecting plate.

5. The composite steel beam structure according to claim 1, characterized in that, The floor slab has a receiving groove on its lower surface, and the elastic pad is disposed in the receiving groove.

6. The composite steel beam structure according to any one of claims 1 to 5, characterized in that, The movable end is provided with first reinforcing ribs at intervals on both sides along the length of the steel beam.

7. The composite steel beam structure according to any one of claims 1 to 5, characterized in that, The rotating end is provided with second reinforcing ribs at intervals on both sides along the length of the steel beam.

Images