Formwork-free steel-concrete composite beam structure

Abstract

The utility model discloses a template-free steel-concrete composite beam structure, which relates to the technical field of bridge construction and comprises a bottom plate, web plates are fixedly connected to two sides of the bottom plate in the length direction, end sealing plates are fixedly connected to two sides of the bottom plate in the width direction, and two groups of web plates and two groups of section sealing plates form a rectangular frame structure. A top plate is fixedly arranged in the rectangular frame structure, and the top of the web plate is fixedly connected with a web plate upper flange; a concrete surface layer is poured on the portion, located above the top plate, of the rectangular frame structure. According to the utility model, the rectangular frame structure is connected with the concrete surface layer through shear studs; the rectangular frame structure can serve as a concrete surface layer pouring formwork, formwork erecting is not needed, concrete is located in a pressed area, steel bars can not be arranged, the working procedures of formwork erecting and steel bar binding on site are reduced, and construction is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a formwork-free steel-concrete composite beam structure. Background Technique

[0002] With the promotion of urban upgrading and urbanization construction, the construction of transportation infrastructure has developed rapidly, and roads and pipelines have become increasingly complex. The following situations occur more and more frequently:

[0003] 1. When a newly built road crosses an existing line, due to the immutability of the use function of the existing structure, it is necessary to carry out pier column replacement through the newly built capping beam.

[0004] 2. Drainage, telecommunications lighting, high-voltage pipelines, etc. need to cross the existing road. Due to the complex situation of the pipelines under the existing road, it is impossible to pass through from below, and it is necessary to newly build a pipeline bridge spanning the road.

[0005] At present, for the newly built pier column replacement capping beam and the pipeline bridge spanning the road, the common structures include cast-in-place reinforced concrete structure, steel structure, and steel-concrete composite beam structure. Among them, the steel structure and the steel-concrete composite beam structure have the characteristics of large span and less impact on the traffic under the bridge. The steel-concrete composite beam structure has been more and more widely used due to its moderate cost. However, when pouring the upper concrete slab of the conventional steel-concrete composite beam structure, formwork still needs to be erected and steel bars need to be tied, and the construction is still relatively complex. Content of the Utility Model

[0006] The purpose of the utility model is to provide a formwork-free steel-concrete composite beam structure to solve the technical problem that formwork still needs to be erected and steel bars need to be tied when pouring the upper concrete slab of the conventional steel-concrete composite beam structure, and the construction is still relatively complex.

[0007] The purpose of the utility model can be realized by the following technical solutions:

[0008] A formwork-free steel-concrete composite beam structure includes a bottom plate. Both sides of the bottom plate in the length direction are fixedly connected with webs. Both sides of the bottom plate in the width direction are fixedly connected with end sealing plates. The two webs and the two section sealing plates form a rectangular frame structure. A top plate is fixedly arranged inside the rectangular frame structure. The top of the web is fixedly connected with a web upper flange; the part of the rectangular frame structure above the top plate is filled with a concrete surface layer.

[0009] As a further scheme of the utility model: A plurality of diaphragms are fixedly connected between the two webs. A through hole is arranged at the center of the diaphragm, and a diaphragm edging is arranged at the through hole.

[0010] As a further scheme of the utility model: Support diaphragms are fixedly installed on both sides of the two webs close to the end sealing plates, and a plurality of support stiffeners are fixedly installed on the support diaphragms.

[0011] As a further solution of the utility model: a plurality of shear stud bolts are installed on both the side wall and the upper end of the top plate of the rectangular frame structure with a concrete surface layer poured thereon.

[0012] As a further solution of the utility model: a transverse connecting beam is arranged between the upper flanges of the two webs, and the transverse connecting beam is connected to the top plate through a vertical rib.

[0013] As a further solution of the utility model: the transverse connecting beam includes a beam web, the upper end of the beam web is fixedly connected with an upper beam flange, the beam web is aligned with the vertical rib, the lower end of the beam web is fixedly connected with a lower beam flange, and the upper beam flange, the beam web and the lower beam flange form an I-shaped structure.

[0014] Advantages of the utility model:

[0015] (1) In the utility model, the rectangular frame structure and the concrete surface layer are connected by shear stud bolts; the rectangular frame structure can serve as a formwork for pouring the concrete surface layer, eliminating the need for formwork erection, and since the concrete is in the compression zone, steel bars can be omitted, reducing the on-site formwork erection and steel bar binding processes and facilitating construction.

[0016] (2) In the utility model, the composite beam structure and the concrete surface layer are connected by shear stud bolts. At the same time, the concrete is in the compression zone, and the concrete is wrapped by the steel structure except for the top surface, so steel bars can be omitted, reducing the on-site steel bar binding process and facilitating construction.

[0017] (3) After the steel beam of the utility model is erected, concrete can be directly poured without the need for on-site concrete formwork erection and steel bar binding, reducing the risk of falling objects from height and the impact on the traffic under the bridge. Description of the drawings

[0018] The following further describes the utility model with reference to the drawings.

[0019] Figure 1 is a schematic structural diagram of the whole main view of the utility model;

[0020] Figure 2 is the utility model Figure 1 a sectional structural diagram in the A-A direction;

[0021] Figure 3 is the utility model Figure 1 a sectional structural diagram in the B-B direction;

[0022] Figure 4 is the utility model Figure 1 a sectional structural diagram in the C-C direction;

[0023] Figure 5 is the utility modelFigure 1 Schematic cross-sectional structure diagram in the D-D direction;

[0024] Figure 6 is the present utility model Figure 1 Schematic cross-sectional structure diagram in the E-E direction;

[0025] Figure 7 is the present utility model Figure 2 Schematic cross-sectional structure diagram in the F-F direction.

[0026] In the figure: 1, bottom plate; 2, top plate; 3, upper flange of web; 4, web; 5, diaphragm; 6, edge trim of diaphragm; 7, support diaphragm; 8, support stiffener; 9, end sealing plate; 10, upper flange of cross beam; 11, web of cross beam; 12, lower flange of cross beam; 13, vertical rib; 14, support backing plate; 15, shear stud; 16, concrete surface layer. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0028] Please refer to Figures 1-7 As shown, the present utility model is a steel-concrete composite beam structure without formwork, including a bottom plate 1. Both sides of the bottom plate 1 in the length direction are fixedly connected with webs 4, and both sides of the bottom plate 1 in the width direction are fixedly connected with end sealing plates 9. The two webs 4 and the two end sealing plates 9 form a rectangular frame structure. Inside the rectangular frame structure, a top plate 2 is fixedly arranged. The top of the web 4 is fixedly connected with an upper flange 3 of the web; The part of the rectangular frame structure above the top plate 2 is filled with a concrete surface layer 16.

[0029] A support backing plate 14 is fixedly installed at the lower end of the bottom plate 1, and the bottom plate 1 is supported by the support backing plate 14.

[0030] A plurality of diaphragms 5 are fixedly connected between the two webs 4. A through hole is provided in the center of the diaphragm 5, and an edge trim 6 of the diaphragm is provided at the through hole.

[0031] Specifically, the diaphragm 5 is arranged parallel to the end sealing plate 9 inside the rectangular frame structure, and supports the two webs 4 to ensure the overall connection strength of the entire rectangular frame structure. At the same time, the diaphragm 5 plays a role in supporting the top plate 2 to ensure the installation stability of the top plate 2.

[0032] On both sides of the two groups of webs 4 near the end closure plates 9, support diaphragms 7 are fixedly installed, and a plurality of support stiffeners 8 are fixedly installed on the support diaphragms 7.

[0033] Specifically, two groups of support diaphragms 7 are provided and are respectively located on both sides of the web 4. The two sides of the rectangular frame structure are blocked by the end closure plates 9. On the one hand, the overall strength of the entire composite beam is improved, and on the other hand, the tightness of the rectangular frame structure is ensured.

[0034] On the side walls and the upper ends of the top plates 2 of the rectangular frame structures filled with the concrete surface layer 16, a number of shear studs 15 are installed.

[0035] By arranging the shear studs 15, a limiting effect is achieved after the pouring and shaping of the concrete surface layer 16, thereby improving the tightness and stability of the connection between the concrete surface layer 16 and the rectangular frame mechanism, and further improving the overall strength of the entire composite beam.

[0036] A cross beam is arranged between the upper flanges 3 of the two webs. The cross beam is connected to the top plate 2 through the vertical ribs 13.

[0037] The cross beam includes a beam web 11. The upper end of the beam web 11 is fixedly connected to a beam upper flange 10. The beam web 11 is aligned with the vertical rib 13. The lower end of the beam web 11 is fixedly connected to a beam lower flange 12. The beam upper flange 10, the beam web 11 and the beam lower flange 12 form an I-shaped structure.

[0038] By arranging a cross beam in the area where the concrete surface layer 16 is poured, excessive deformation of the web cantilever during concrete pouring is avoided, the overall strength of the pouring of the entire concrete surface layer 16 is improved, and at the same time, the tight connection between the concrete surface layer 16 and the composite beam is ensured, and the overall strength of the entire composite beam is improved.

[0039] The working principle of the present utility model: The support backing plate 14 is fixedly welded to the bottom of the bottom plate 1, and a number of diaphragms 5 are fixedly welded to the upper end of the bottom plate 1. Support diaphragms 7 are fixedly welded on both sides of the bottom plate 1 near the short sides. Support stiffeners 8 are fixedly welded on the support diaphragms 7. The top plate 2 is installed on the upper ends of the diaphragms 5 and the support diaphragms 7. End closure plates 9 are fixedly welded on both sides of the short sides of the bottom plate 1. Webs 4 are fixedly welded on both sides of the long sides of the bottom plate 1 to form the overall shape of the composite beam. After installing the cross beam, the web upper flanges 3 are installed on the top of the webs 4. Subsequently, concrete is poured to form the concrete surface layer 16.

[0040] The above has described a detailed description of an embodiment of the present utility model, but the content described is only the preferred embodiment of the present utility model and cannot be considered as used to limit the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A formwork-free steel-concrete composite beam structure, characterized in that: The invention comprises a bottom plate (1), wherein both sides of the bottom plate (1) in the length direction are fixedly connected to web plates (4), and both sides of the bottom plate (1) in the width direction are fixedly connected to end sealing plates (9), two groups of web plates (4) and two groups of segment sealing plates (9) form a rectangular frame structure, a top plate (2) is fixedly arranged inside the rectangular frame structure, and the top of the web plate (4) is fixedly connected to the flange (3) on the web plate; the part of the rectangular frame structure located above the top plate (2) is poured with a concrete surface layer (16).

2. The formwork-free steel-concrete composite beam structure according to claim 1 is characterized in that: A plurality of transverse partitions (5) are fixedly connected between the two groups of webs (4), a through hole is arranged at the center of the transverse partition (5), and a transverse partition edging (6) is arranged at the through hole.

3. The formwork-free steel-concrete composite beam structure according to claim 1 is characterized in that: Support transverse diaphragms (7) are fixedly installed on both sides of the two groups of webs (4) close to the end sealing plates (9), and a plurality of support stiffening ribs (8) are fixedly installed on the support transverse diaphragms (7).

4. The formwork-free steel-concrete composite beam structure according to claim 1 is characterized in that: A plurality of shear bolts (15) are installed on the side walls and upper ends of the top plate (2) of the rectangular frame structure poured with a concrete surface layer (16).

5. The formwork-free steel-concrete composite beam structure according to claim 1 is characterized in that: A transverse beam is arranged between the two web upper flanges (3), and the transverse beam is connected to the top plate (2) via a vertical rib (13).

6. The formwork-free steel-concrete composite beam structure according to claim 5 is characterized in that: The transverse beam comprises a cross beam web (11), the upper end of the cross beam web (11) is fixedly connected to the cross beam upper flange (10), the cross beam web (11) is positioned relative to the vertical rib (13), the lower end of the cross beam web (11) is fixedly connected to the cross beam lower flange (12), and the cross beam upper flange (10), the cross beam web (11) and the cross beam lower flange (12) form an I-shaped structure.

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