CN115538694A - composite steel beam structure - Google Patents

Abstract

The invention relates to the technical field of steel beam structures, and discloses a composite steel beam structure, including a floor slab, a steel beam, a first through-length beam and a second through-length beam, the floor is connected to the first through-length beam and the second through-length beam, and the first through-length beam is connected to the second through-length beam. The first long beam is provided with a first support unit, the second long 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 In the unit, the floor is provided with anti-crack anti-sill, and the lower surface of the floor is provided with an elastic cushion. Its beneficial effects are: the movable end is movably installed on the first support unit, and the bending deformation of the steel beam is released by sliding along the length direction of the steel beam, so as to improve the mechanical performance of the steel beam; the anti-crack anti-sill can release the tensile stress of the floor slab The rotating end is rotatably installed on the second support unit, and a small rotation occurs to adapt to the influence of the bending deformation of the steel beam; the elastic cushion can disperse the pressure from the rotating end and prevent the rotating end from cracking the floor.

Description

composite steel beam structure

technical field

The invention relates to the technical field of steel beam structures, in particular to a composite steel beam structure.

Background technique

For areas with large spans and heavy loads, the load-bearing structure generally adopts a composite steel beam structure formed by prestressed concrete beams, steel trusses, or steel beams + composite floors. Among them, the composite steel beam structure is widely used because of its advantages of high material utilization rate, small section height, and convenient construction.

In the related art, under the action of the floor slab, the end of the composite steel beam structure will generate a relatively large negative bending moment. For long-span and heavy-load composite steel beam structures, the negative bending moment is amplified accordingly, and affects the floor above the composite steel beam structure, causing cracks in the floor and affecting the safety and durability of the composite steel beam structure. Because of large spans and heavy loads, steel beams also accumulate large compression deformations. Due to the pin action of the studs, this compression deformation will be transmitted to the floor along with the upper flange of the steel beam, and then transmitted to other positions of the floor in the form of tension, and a large tensile stress will be generated at these positions, affecting the safety of the composite steel beam structure and durability.

Contents of the invention

The technical problem to be solved by the invention is: the existing composite steel beam structure has poor safety and low durability.

In order to solve the above technical problems, the present invention provides a composite steel beam structure, including a floor slab, a steel beam, a first long beam and a second long beam, the floor is connected to the first long beam and the second long beam. Two long beams, the first long beam is provided with a first support unit, the second long beam is provided with a second support unit, the steel beam is arranged below the floor, and the steel beam has A movable end and a rotating end, the movable end is installed on the first supporting unit, and the movable end can slide along the length direction of the steel beam and rotate around the first supporting unit, and the rotating end is installed in rotation In the second support unit, the floor is provided with an anti-crack anti-sill, and the anti-crack anti-sill is arranged close to the first support unit, and the lower surface of the floor is provided with an elastic pad, and the elastic pad A layer is located above the rotating end.

In the above technical solution, the first supporting unit includes a first support and a first support, the first support is installed on the first full-length beam, and the first support is installed on the first A girder, the movable end is installed on the first support, and the movable end can rotate around the first support.

In the above technical solution, the first support is respectively 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 first cover The two sides of the plate are respectively provided with first limiting parts, and the two first limiting parts extend into the two first limiting grooves respectively, and the first limiting part and the first limiting part There is a first interval between the grooves.

In the above technical solution, the first support has a central axis, and a side wall of the anti-cracking sill is farther away from the first long beam than the central axis.

In the above technical solution, the second support unit includes a second beam support and a second support, the second support is installed on the second long beam, and the second support is installed on the first Two girders, the rotating end is rotatably mounted on the second support.

In the above technical solution, the second support is provided with a second limit groove connected end to end, the second limit groove extends along the circumference of the second support, and the lower surface of the steel beam A second cover plate is provided, and the second cover plate is provided with a support ring, and the end of the support ring away from the second cover plate is provided with a second limit portion connected end to end, and the second limit portion Extending inward along the radial direction of the support ring, the second limiting portion extends into the second limiting groove, and there is a second limiting portion between the second limiting groove and the second limiting groove. interval.

In the above technical solution, the first full-length beam is provided with a connecting plate, and the movable end can be connected to the connecting plate.

In the above technical solution, a receiving groove is opened on the lower surface of the floor, and the elastic pad is arranged in the receiving groove.

In the above technical solution, first reinforcing ribs are arranged at intervals on both sides of the movable end along the length direction of the steel beam.

In the above technical solution, second reinforcing ribs are arranged at intervals on both sides of the rotating end along the length direction of the steel beam.

Compared with the prior art, the composite steel beam structure of the embodiment of the present invention has the beneficial effect that: the movable end is movably installed on the first support unit, and the steel beam can be released by sliding along the length direction of the steel beam after the floor is loaded. Bending deformation to improve the mechanical performance of the steel beam, and a slight rotation occurs during the sliding process to adapt to the impact of the steel beam recovering from the bending deformation; anti-cracking anti-sill can release the deformation of the steel beam at the movable end At the same time, the corresponding deformation can release the tensile stress of the floor slab caused by the negative bending moment, so as to avoid cracking of the floor slab; The impact from the rotating end; when the rotating end turns up slightly, it can abut against the elastic cushion above it to disperse the pressure from the rotating end and prevent the rotating end from cracking the floor.

Description of drawings

Fig. 1 is a structural schematic diagram of a composite steel beam structure applied to a basement according to an embodiment of the present invention;

Fig. 2 is a partial cross-sectional schematic diagram of A-A direction in Fig. 1;

Fig. 3 is a schematic cross-sectional view of direction 1-1 in Fig. 2;

Fig. 4 is a partial cross-sectional schematic diagram of B-B direction in Fig. 1;

Fig. 5 is a schematic sectional view of direction 2-2 in Fig. 4;

In the figure, 1, floor slab; 11, elastic cushion; 12, anti-crack and anti-sill;

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. The second a reinforcing rib;

3. The first long beam; 31. The first support unit; 311. The first girder; 312. The first support; 32. The connecting plate;

4. The second long beam; 41. The second support unit; 411. The second corbel; 412. The second support.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner" and "outer" in the present invention are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a reference to this invention. Invention Limitations.

In the description of the present invention, it should be understood that the terms "connected", "connected" and "fixed" used in the present invention should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integrate; can be mechanical connection, can also be welded connection; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined . Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a composite steel beam structure in a preferred embodiment of the embodiment of the present invention includes a floor 1, a steel beam 2, a first long beam 3 and a second A long beam 4, the floor 1 is connected to the first long beam 3 and the second long beam 4, the first long beam 3 is provided with a first support unit 31, and the second long beam 4 is provided with a second support unit 41, The steel beam 2 is arranged below the floor 1, the steel beam 2 has a movable end and a rotating end, the movable end is installed on the first support unit 31, and the movable end can slide along the length direction 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 1 is provided with an anti-crack anti-sill 12, and the anti-crack anti-sill 12 is arranged close to the first support unit 31, and the lower surface of the floor 1 is provided with an elastic pad 11, and the elastic pad Layer 11 is located above the rotating end.

It can be understood that the movable end is movably installed on the first support unit 31, and the bending deformation of the steel beam 2 can be released by sliding along the length direction of the steel beam 2 after the floor 1 is loaded, so as to improve the mechanical performance of the steel beam 2 , and a slight rotation occurs during the sliding process to adapt to the influence brought by the steel beam 2 recovering from the bending deformation; the anti-crack anti-sill 12 can release the deformation of the steel beam 2 at the movable end, and produce corresponding deformation, which can Release the tensile stress of the floor 1 caused by the negative bending moment to avoid cracking of the floor 1; the rotating end is rotatably installed on the second support unit 41, and a slight rotation can occur to adapt to the impact of the steel beam 2 recovering from the bending deformation; The rotating end is upturned when a slight rotation occurs, and can abut against the elastic pad 11 above it, so as to prevent the rotating end from cracking the floor 1 .

Preferably, the steel bars are processed into triangular steel bar trusses in the factory, and are integrated with the bottom form to form the floor 1, and the bottom form is made of galvanized steel.

Preferably, the elastic cushion layer 11 is a compressible polystyrene board.

Preferably, if the width of the flange of the steel beam 2 is relatively wide, making it difficult to construct the welded support or the connecting plate 32, the flange can be narrowed at a slope of 1:2.5 in the range of the support to facilitate welding.

Preferably, the first long beam 3 and the second long beam 4 are arranged in parallel.

Further, as shown in Fig. 1, Fig. 4 and Fig. 5, the first support unit 31 includes a first support 311 and a first support 312, the first support 311 is installed on the first long 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 .

It can be understood that the first girder 311 supports the first support 312, so that the movable end can release the bending deformation of the steel girder 2 by sliding along the length direction of the steel girder 2, so as to improve the stress of the steel girder 2 Performance, and a small rotation occurs during the sliding process to adapt to the impact of steel beam 2 recovering from bending deformation. Simultaneously, due to the sliding and rotating of the movable end, the cracking of the first girder 311 under the compressive deformation of the steel beam 2 and the tensile stress of the floor 1 can be avoided.

Preferably, the first girder 311 is disposed on the side of the first long beam 3 facing the second long girder 4 , and the cross-sectional area of the first girder 311 along the height direction is equal everywhere.

Further, as shown in FIG. 1 , FIG. 4 and FIG. 5 , the first support 312 is respectively provided with first limiting grooves on both sides along the length direction of the steel beam 2 , and 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 respectively provided with first limiting parts 211, and the two first limiting parts 211 extend into the two first limiting grooves respectively. The first limiting part 211 and the first limiting part There is a first interval between the bit slots.

It can be understood that the first support 312 is respectively provided with first limiting grooves on both sides along the length direction of the steel beam 2, so that after the first limiting part 211 extends into the corresponding first limiting groove, the steel beam 2 The movement of the movable end on the horizontal plane perpendicular to the length direction of the steel beam 2 is greatly restricted, and the steel beam 2 cannot escape from the first support 312 from this direction and the vertical direction, while the first limiting part 211 and the first There is a first interval between the limiting slots, which allows the movable end to rotate slightly to adapt to the impact brought by the recovery of the steel beam 2 from bending deformation.

Further, as shown in Figure 4, the first support 312 has a central axis, and one side wall of the anti-crack anti-sill 12 is farther away from the first long beam 3 than the central axis, which can prevent the movable end from turning up to the opposite side. adverse effect on the wall.

Exemplarily, the first support 312 is a cylindrical structure, and the central axis is the line connecting the centers of the upper and lower bottom circles of the first support 312 .

Further, as shown in FIG. 1 , FIG. 2 and FIG. 3 , the second supporting unit 41 includes a second girder 411 and a second support 412 , the second girder 411 is installed on the second long beam 4 , and the second support The seat 412 is installed on the second beam support 411 , and the rotating end is rotatably installed on the second support 412 .

It can be understood that the second girder 411 supports the second support 412, so that the rotating end can be slightly rotated on the second support 412 to adapt to the influence brought by the recovery of the steel beam 2 from bending deformation. .

Preferably, the second girder 411 is disposed on a side of the second long beam 4 facing the first long beam 3 .

Further, as shown in Fig. 1, Fig. 2 and Fig. 3, the second support 412 is provided with a second limit slot connected end to end, the second limit slot extends along the circumference of the second support 412, and the steel beam The lower surface of the 2 is provided with a second cover plate 22, the second cover plate 22 is provided with a support ring 221, and the end of the support ring 221 away from the second cover plate 22 is provided with a second stopper 222 connected end to end, the second limiter The position portion 222 extends inward along the radial direction of the support ring 221 , and the second limiting portion 222 extends into the second limiting groove.

It can be understood that, the second support 412 is provided with a second limiting groove connected end to end, and the second limiting groove extends along the circumferential direction of the second support 412 so that the second limiting portion 222 extends into the second limiting groove. After the bit groove, the movement of the movable end of the steel beam 2 in the horizontal direction is greatly restricted, and the steel beam 2 cannot escape from the first support 312 in the horizontal and vertical directions, while the first limiting part 211 and the second There is a second interval between the limiting grooves, which allows the rotating end to rotate slightly to adapt to the influence brought by the recovery of the steel beam 2 from bending deformation.

Further, as shown in FIG. 4 , the first long beam 3 is provided with a connecting plate 32 , and the movable end can be connected to the connecting plate 32 .

It can be understood that the integrity of the sliding end and the first long beam 3 can be strengthened by welding the movable end to the web of the steel beam 2 .

Further, as shown in FIG. 2 , a receiving groove is opened on the lower surface of the floor 1 , and the elastic cushion layer 11 is arranged in the receiving groove.

It can be understood that the accommodating groove can prevent the floor 1 from being directly pressured when the rotating end is upturned, and the floor 1 is cracked. The rotating end is upturned and the floor slab 1 is cracked.

Further, as shown in FIG. 4 , first reinforcing ribs 24 are arranged at intervals on both sides of the movable end along the length direction of the steel beam 2 . It can be understood that the first reinforcing rib 24 can transmit the concentrated force and the vertical component force of the flange of the steel beam 2 .

Further, as shown in FIG. 2 , second reinforcing ribs 23 are arranged at intervals on both sides of the rotating end along the length direction of the steel beam 2 . It can be understood that the first reinforcing rib 24 can transmit the concentrated force and the vertical component force on the upper and lower sides of the steel beam 2 .

The working process of the present invention is: apply a predetermined amount of load to the floor 1, so that the sliding end is displaced to a suitable position; weld the steel beam 2 and the upper flange of the steel beam 2 with studs; pour the floor 1; weld the first support 312 and the movable end; welding the second bearing 412 and the rotating end; covering the soil; welding the steel beam 2 webs and the connecting plate 32.

To sum up, the embodiment of the present invention provides a composite steel beam structure, the movable end of which is movably installed on the first support unit 31, and the bending of the steel beam 2 can be released by sliding along the length direction of the steel beam 2 after the floor 1 is loaded. Deformation to improve the mechanical performance of the steel beam 2, and a slight rotation occurs during the sliding process to adapt to the impact of the steel beam 2 recovering from bending deformation; the anti-crack anti-sill 12 can release the steel beam 2 at the movable end At the same time as the deformation of the floor 1, the corresponding deformation can be released, which can release the tensile stress of the floor 1 caused by the negative bending moment, so as to avoid cracking of the floor 1; The impact brought by the recovery from bending deformation; the rotating end is upturned when a slight rotation occurs, and can abut against the elastic cushion 11 above it, so as to prevent the rotating end from cracking the floor 1 .

The above are only preferred embodiments of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and replacements can also be made without departing from the technical principle of the present invention, and these improvements and replacements should also be It is regarded as the protection scope of the present invention.

Claims (10)

1. A composite steel beam structure, characterized in that it comprises a floor slab, a steel beam, a first full-length beam and a second full-length beam, and the floor slab connects the first full-length beam and the second full-length beam , the first long beam is provided with a first support unit, the second long beam is provided with a second support unit, the steel beam is arranged below the floor, the steel beam has a movable end and a rotating end, the movable end is installed on the first support unit, and the movable end can slide along the length direction of the steel beam and rotate around the first support unit, and the rotating end is rotatably installed on the first support unit Two support units, the floor is provided with an anti-crack anti-sill, the anti-crack anti-sill is arranged close to the first support unit, the lower surface of the floor is provided with an elastic cushion, and the elastic cushion is located on the above the rotating end. 2. The composite steel beam structure according to claim 1, wherein the first supporting unit comprises a first corbel and a first support, and the first corbel is installed on the first long beam , the first support is installed on the first beam support, the movable end is installed on the first support, and the movable end can rotate around the first support. 3. The composite steel beam structure according to claim 2, characterized in that, the first support is respectively provided with first limiting grooves on both sides along the length direction of the steel beam, and the lower surface of the steel beam A first cover plate is provided, and first limit portions are respectively provided on both sides of the first cover plate, and the two first limit portions respectively extend into the two first limit grooves. There is a first interval between the first limiting portion and the first limiting groove. 4. The composite steel beam structure according to claim 2, wherein the first support has a central axis, and one side wall of the anti-cracking sill is farther away from the first channel than the central axis. long beam. 5. The composite steel beam structure according to claim 1, wherein the second supporting unit comprises a second corbel and a second support, and the second corbel is installed on the second long beam , the second support is installed on the second beam support, and the rotating end is rotatably installed on the second support. 6. The composite steel beam structure according to claim 5, characterized in that, the second support is provided with a second limiting groove connected end to end, and the second limiting groove is along the length of the second support. Extending in the circumferential direction, the lower surface of the steel beam is provided with a second cover plate, the second cover plate is provided with a support ring, and the end of the support ring away from the second cover plate is provided with a first Two limiting parts, the second limiting part extends inward along the radial direction of the support ring, the second limiting part extends into the second limiting groove, the second limiting part and There is a second interval between the second limiting slots. 7. The composite steel beam structure according to claim 1, characterized in that, the first full-length beam is provided with a connecting plate, and the movable end can be connected to the connecting plate. 8 . The composite steel beam structure according to claim 1 , wherein a receiving groove is opened on the lower surface of the floor slab, and the elastic pad is arranged in the receiving groove. 9 . 9. The composite steel beam structure according to any one of claims 1 to 8, characterized in that first reinforcing ribs are arranged at intervals on both sides of the movable end along the longitudinal direction of the steel beam. 10 . The composite steel beam structure according to any one of claims 1 to 8 , characterized in that, second reinforcing ribs are arranged at intervals on both sides of the rotating end along the length direction of the steel beam. 11 .

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