Sliding type connecting structure of steel box girder

Abstract

The utility model provides a steel box girder sliding type connecting structure which enables a steel box girder unit and a second support to form flexible connection, and an upper flange plate and a lower flange plate of the steel box girder unit do not abut against a first support and the second support. The steel box girder unit can more transmit shearing force to the first support and the second support, and torque borne by the first support and the second support is reduced; meanwhile, the second end of the steel box girder unit is in sliding connection with the second support, the requirement that the telescopic deformation of the steel box girder unit is affected by load and temperature is met, and structural damage to the first support and the second support during telescopic deformation of the steel box girder unit is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of steel beams, in particular to a sliding connection structure for steel box girders. Background Art

[0002] A steel box girder is a steel beam with a box-shaped cross-section and is one of the commonly used steel beam structures in construction; in some cases, limited by the building structure, the support conditions at both ends of the steel box girder are poor. For example, when both ends of the steel box girder are respectively arranged on two reinforced concrete beam bodies, and the torsional resistance of the reinforced concrete beam body is poor, if the steel box girder is directly rigidly connected to the reinforced concrete beam body, during subsequent use, it is easy to cause cracking and deformation of the reinforced concrete beam body, affecting the overall stability of the building structure; moreover, when the steel box girder expands and contracts due to temperature changes, it will also affect the support structures at both ends of the steel box girder; in view of the above situation, it is necessary to make improvements. Summary of the Utility Model

[0003] In view of this, the utility model provides a sliding connection structure for steel box girders, aiming to solve the above problems to at least a certain extent.

[0004] The technical solution of the utility model is realized as follows:

[0005] A sliding connection structure for steel box girders, comprising:

[0006] A steel box girder unit, a first support, and a second support;

[0007] The steel box girder unit includes an upper flange plate, a lower flange plate, and two webs;

[0008] The first support is arranged at the first end of the steel box girder unit. A first connecting member is provided on the first support. The first connecting member includes two vertically and parallelly arranged first connecting plates. The web at the first end of the steel box girder unit is arranged between the two first connecting plates. A horizontally arranged first bolt is connected between the first connecting plate and the web. A gap is formed between the first end of the steel box girder unit and the first support;

[0009] The second support is arranged at the second end of the steel box girder unit. A second connecting member is provided on the second support. The second connecting member includes two vertically and parallelly arranged second connecting plates. The web at the second end of the steel box girder unit is arranged between the two second connecting plates. A strip-shaped sliding hole is provided on the second connecting plate. A horizontally arranged second bolt is provided on the web at the second end of the steel box girder unit. The second bolt is slidably arranged in the strip-shaped sliding hole. A gap is formed between the second end of the steel box girder unit and the second support.

[0010] As a further optional scheme, the first support and the second support are reinforced concrete structures, the first connecting member and the second connecting member are metal members, the first connecting member also includes a first tension plate, the first tension plate is pre-embedded on the side of the first support close to the steel box beam unit, and the first connecting plate is arranged on the exposed side of the first tension plate; the second connecting member also includes a second tension plate, the second tension plate is pre-embedded on the side of the second support close to the steel box beam unit, and the second connecting plate is arranged on the exposed side of the second tension plate.

[0011] As a further optional solution, the first tension plate is tension-anchored on the first support, and the second tension plate is tension-anchored on the second support.

[0012] As a further optional solution, a first shear key is provided on the side of the first tension plate away from the first connecting plate, and the first shear key is pre-embedded in the first support; a second shear key is provided on the side of the second tension plate away from the second connecting plate, and the second shear key is pre-embedded in the second support.

[0013] As a further optional solution, the first shear key and the second shear key are H-shaped steels.

[0014] As a further optional solution, the first shear key and the second shear key are studs.

[0015] As a further optional scheme, a plurality of first stiffening plates arranged along the vertical interval are provided between the first pair of tension plates and the first connecting plate, and the first stiffening plates are respectively arranged perpendicular to the first pair of tension plates and the first connecting plate; a plurality of second stiffening plates arranged along the vertical interval are provided between the second pair of tension plates and the second connecting plate, and the second stiffening plates are respectively arranged perpendicular to the second pair of tension plates and the second connecting plate.

[0016] As a further optional solution, a polytetrafluoroethylene slide plate is provided between the web and the second connecting plate, and the polytetrafluoroethylene slide plate is fixed on the web or the second connecting plate.

[0017] As a further optional solution, there are two first connecting members on the first support, and the two first connecting members correspond to the two webs at the first end of the steel box beam unit respectively; there are two second connecting members on the second support, and the two second connecting members correspond to the two webs at the second end of the steel box beam unit respectively.

[0018] As a further optional solution, a plurality of the strip-shaped sliding holes are vertically arranged on the second connecting plate, and at least two second bolts are provided in each strip-shaped sliding hole.

[0019] The sliding connection structure of the steel box girder of the present application has at least the following beneficial effects compared with the prior art:

[0020] The sliding connection structure of the steel box girder enables the steel box girder unit to form a flexible connection with the second support. Neither the upper flange plate nor the lower flange plate of the steel box girder unit abuts against the first support and the second support, so that the steel box girder unit mainly transfers shear force to the first support and the second support, reducing the torque received by the first support and the second support. At the same time, the second end of the steel box girder unit is slidably connected to the second support, meeting the need for telescopic deformation of the steel box girder unit under the influence of load and temperature, and avoiding structural damage to the first support and the second support when the steel box girder unit undergoes telescopic deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a top view schematic diagram of a sliding connection structure of a steel box girder according to an embodiment of the present invention;

[0023] Figure 2 It is a side view schematic diagram of a sliding connection structure of a steel box girder according to an embodiment of the present invention.

[0024] In the figure: 1. Steel box girder unit; 11. Upper flange plate; 12. Lower flange plate; 13. Web;

[0025] 2. First support; 21. First connecting member; 211. First connecting plate; 212. First tie plate; 213. First stiffening plate; 214. First shear key;

[0026] 3. Second support; 31. Second connecting member; 311. Second connecting plate; 3111. Strip-shaped sliding hole; 312. Second tie plate; 313. Second stiffening plate; 314. Second shear key;

[0027] 4. First bolt;

[0028] 5. Second bolt;

[0029] 6. Polytetrafluoroethylene sliding plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solutions in the embodiments of the present utility model will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0032] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Reference Figure 1 and Figure 2 , an embodiment of the present utility model shows a sliding connection structure for a steel box girder, including a steel box girder unit 1, a first support 2, and a second support 3;

[0034] Among them, the steel box girder unit 1 includes an upper flange plate 11, a lower flange plate 12 and two webs 13; the first support 2 is arranged at the first end of the steel box girder unit 1, and a first connecting member 21 is provided on the first support 2. The first connecting member 21 includes two vertically and parallelly arranged first connecting plates 211. The web 13 at the first end of the steel box girder unit 1 is arranged between the two first connecting plates 211. A horizontally arranged first bolt 4 is connected between the first connecting plate 211 and the web 13. A gap is formed between the first end of the steel box girder unit 1 and the first support 2; the second support 3 is arranged at the second end of the steel box girder unit 1, and a second connecting member 31 is provided on the second support 3. The second connecting member 31 includes two vertically and parallelly arranged second connecting plates 311. The web 13 at the second end of the steel box girder unit 1 is arranged between the two second connecting plates 311. A strip-shaped sliding hole 3111 is provided on the second connecting plate 311. A horizontally arranged second bolt 5 is provided on the web 13 at the second end of the steel box girder unit 1. The second bolt 5 is slidably arranged in the strip-shaped sliding hole 3111. A gap is formed between the second end of the steel box girder unit 1 and the second support 3.

[0035] Specifically, the first support 2 and the second support 3 are, for example, reinforced concrete beam bodies, and the length direction is perpendicular to the length direction of the steel box girder unit 1. This reinforced concrete beam body has poor torsional resistance but good shear resistance; this steel box girder sliding connection structure enables the steel box girder unit 1 to form a flexible connection with the first support 2 and the second support 3 at both ends. Neither the upper flange plate 11 nor the lower flange plate 12 of the steel box girder unit 1 abuts against the first support 2 and the second support 3, so that the steel box girder unit 1 mainly transfers shear force to the first support 2 and the second support 3, reducing the bending moment transferred from the steel box girder unit 1 to the first support 2 and the second support 3, thereby reducing the torque borne by the first support 2 and the second support 3; at the same time, the second end of the steel box girder unit 1 is slidably connected to the second support 3. Under the action of the load, the steel box girder will bend and deform, and there is displacement along the longitudinal axis of the beam. At least part of it can be released through the sliding at one end; it meets the need for the steel box girder unit to expand and contract under the action of load and temperature, and avoids structural damage to the first support 2 and the second support 3 when the steel box girder unit 1 expands and contracts.

[0036] Specifically, in the above solution, as Figure 1 shown, there are two first connecting members 21 on the first support 2, and the two first connecting members 21 respectively correspond to the two webs 13 at the first end of the steel box girder unit 1; there are two second connecting members 31 on the second support 3, and the two second connecting members 31 respectively correspond to the two webs 13 at the second end of the steel box girder unit 1. In other words, both ends of the two webs 13 are connected to the first connecting member 21 or the second connecting member 31 to ensure the stable connection of the steel box girder unit 1.

[0037] Specifically, in order to further improve the installation stability of the web 13, the above solution Figure 2 As shown, a plurality of first bolts 4 are provided between the first connecting plate 211 and the web 13. The number of the first bolts 4 is determined according to the force requirements. Preferably, in this embodiment, the plurality of first bolts 4 are arranged in an array structure of two columns and multiple rows.

[0038] Furthermore, the second connecting plate 311 is vertically arranged with multiple strip-shaped sliding holes 3111. Each strip-shaped sliding hole 3111 contains at least two second bolts 5. This facilitates stable sliding of the steel box girder unit 1 on the second support 3. The number of second bolts in each strip-shaped sliding hole is determined based on the required force, but at least two are provided.

[0039] Preferably, the first bolts are friction-type high-strength bolts; the second bolts are pressure-type high-strength bolts, ensuring that the connection nodes have sufficient strength.

[0040] In some embodiments, to ensure that the first connecting member 21 and the second connecting member 31 are firmly installed on the first support 2 and the second support 3 respectively, Figure 1 and Figure 2 As shown, the first support 2 and the second support 3 are reinforced concrete structures, the first connecting member 21 and the second connecting member 31 are metal members, the first connecting member 21 also includes a first tension plate 212, the first tension plate 212 is pre-embedded on the side of the first support 2 close to the steel box beam unit 1, and the first connecting plate 211 is arranged on the exposed side of the first tension plate 212; the second connecting member 31 also includes a second tension plate 312, the second tension plate 312 is pre-embedded on the side of the second support 3 close to the steel box beam unit 1, and the second connecting plate 311 is arranged on the exposed side of the second tension plate 312.

[0041] Preferably, to further enhance the installation stability of the first and second tension plates 212 and 312, the first tension plate 212 is tension-anchored to the first support 2, and the second tension plate 312 is tension-anchored to the second support 3. The tension anchoring structure in this embodiment can be implemented by tension bolts or steel strands.

[0042] In some embodiments, as Figure 1 and Figure 2As shown, on one side of the first pair of tension plates 212 away from the first connecting plate 211, a first shear key 214 is provided, and the first shear key 214 is embedded in the first support 2; on one side of the second pair of tension plates 312 away from the second connecting plate 311, a second shear key 314 is provided, and the second shear key 314 is embedded in the second support 3. Preferably, the first shear key 214 and the second shear key 314 are H-shaped steels. Through the first shear key 214 and the second shear key 314, the shear resistance between the first support 2 and the first connecting member 21, and between the second support 3 and the second connecting member 31 is increased.

[0043] It should be noted that when the span and the force are not large, stud bolts can also be used for the first shear key and the second shear key.

[0044] In some embodiments, as Figure 1 and Figure 2 shown, between the first pair of tension plates 212 and the first connecting plate 211, a plurality of first stiffening plates 213 are arranged at intervals in the vertical direction, and the first stiffening plates 213 are respectively perpendicular to the first pair of tension plates 212 and the first connecting plate 211; between the second pair of tension plates 312 and the second connecting plate 311, a plurality of second stiffening plates 313 are arranged at intervals in the vertical direction, and the second stiffening plates 313 are respectively perpendicular to the second pair of tension plates 312 and the second connecting plate 311. In this embodiment, the first stiffening plates 213 and the second stiffening plates 313 can further prevent the first connecting plate 211 and the second connecting plate 311 from deforming, and ensure a stable connection with the web 13.

[0045] In some embodiments, to avoid too large frictional force between the web 13 and the second connecting plate 311, as Figure 1 shown, a polytetrafluoroethylene sliding plate 6 is provided between the web 13 and the second connecting plate 311, and the polytetrafluoroethylene sliding plate 6 is fixed on the web 13 or the second connecting plate 311. In this way, the polytetrafluoroethylene sliding plate 6 is used to reduce the frictional force between the web 13 and the second connecting plate 311, facilitating the sliding of the web 13 between the two second connecting plates 311 to adapt to the telescopic deformation of the steel box girder unit 1.

[0046] In summary, the present utility model provides a sliding connection structure for steel box girders. This sliding connection structure for steel box girders enables the steel box girder unit 1 to form a flexible connection with the first support 2 and the second support 3 at both ends. Neither the upper flange plate 11 nor the lower flange plate 12 of the steel box girder unit 1 abuts against the first support 2 and the second support 3, so that the steel box girder unit 1 mainly transfers shear force to the first support 2 and the second support 3, reducing the torque received by the first support 2 and the second support 3. At the same time, the second end of the steel box girder unit 1 is slidably connected to the second support 3, meeting the need for telescopic deformation of the steel box girder unit under the influence of load and temperature, and avoiding structural damage to the first support 2 and the second support 3 when the steel box girder unit 1 undergoes telescopic deformation.

[0047] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A steel box girder sliding connection structure, characterized in that: include: Steel box girder unit, first support and second support; The steel box beam unit includes an upper flange plate, a lower flange plate and two web plates; The first support is disposed at the first end of the steel box beam unit. A first connector is provided on the first support. The first connector includes two vertically and parallelly arranged first connecting plates. The web of the first end of the steel box beam unit is disposed between the two first connecting plates. A horizontally arranged first bolt is connected between the first connecting plate and the web. A gap is formed between the first end of the steel box beam unit and the first support. The second support is arranged at the second end of the steel box beam unit, and a second connecting member is provided on the second support. The second connecting member includes two second connecting plates arranged vertically and parallelly. The web of the second end of the steel box beam unit is arranged between the two second connecting plates. The second connecting plate is provided with a strip sliding hole. The web of the second end of the steel box beam unit is provided with a horizontally arranged second bolt. The second bolt is slidably arranged in the strip sliding hole. A gap is formed between the second end of the steel box beam unit and the second support.

2. The steel box girder sliding connection structure according to claim 1, characterized in that: The first support and the second support are reinforced concrete structures, the first connecting member and the second connecting member are metal members, the first connecting member also includes a first tension plate, the first tension plate is pre-embedded on the side of the first support close to the steel box beam unit, and the first connecting plate is arranged on the exposed side of the first tension plate; the second connecting member also includes a second tension plate, the second tension plate is pre-embedded on the side of the second support close to the steel box beam unit, and the second connecting plate is arranged on the exposed side of the second tension plate.

3. The sliding connection structure of the steel box girder according to claim 2, characterized in that, The first tension plate is tension-anchored on the first support, and the second tension plate is tension-anchored on the second support.

4. The sliding connection structure of the steel box girder according to claim 2, characterized in that, A first shear key is provided on the side of the first tension plate away from the first connecting plate, and the first shear key is pre-embedded in the first support; a second shear key is provided on the side of the second tension plate away from the second connecting plate, and the second shear key is pre-embedded in the second support.

5. The steel box girder sliding connection structure according to claim 4, wherein, The first shear key and the second shear key are H-shaped steels.

6. The steel box girder sliding connection structure according to claim 4, characterized in that: The first shear key and the second shear key are studs.

7. The steel box girder sliding connection structure according to claim 2, characterized in that A plurality of first stiffening plates arranged vertically at intervals are provided between the first pair of tension plates and the first connecting plate, and the first stiffening plates are respectively arranged perpendicular to the first pair of tension plates and the first connecting plate; a plurality of second stiffening plates arranged vertically at intervals are provided between the second pair of tension plates and the second connecting plate, and the second stiffening plates are respectively arranged perpendicular to the second pair of tension plates and the second connecting plate.

8. The sliding connection structure of the steel box girder according to claim 1, characterized in that A polytetrafluoroethylene slide plate is provided between the web and the second connecting plate, and the polytetrafluoroethylene slide plate is fixed to the web or the second connecting plate.

9. The steel box girder sliding connection structure according to claim 1, characterized in that: There are two first connecting members on the first support, and the two first connecting members correspond to the two webs at the first end of the steel box beam unit respectively; there are two second connecting members on the second support, and the two second connecting members correspond to the two webs at the second end of the steel box beam unit respectively.

10. The steel box girder sliding connection structure according to claim 9, characterized in that, A plurality of the strip-shaped sliding holes are arranged vertically on the second connecting plate, and at least two second bolts are provided in each strip-shaped sliding hole.

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