A segmented steel tube concrete beam structure

Abstract

The utility model discloses a segmented steel tube concrete beam structure, including a first beam section and two second beam sections arranged coaxially; the two second beam sections are symmetrically arranged at the two ends of the first beam section, and the three are connected end to end in sequence; the second beam section is a steel tube concrete beam; the first beam section includes a steel pipe, a steel mesh and a concrete layer; the two ends of the steel pipe of the first beam section are connected to the ends of the steel pipe of the second beam section; the top of the steel pipe of the first beam section is open, and a steel mesh is arranged below the opening, and the steel mesh is arranged to penetrate along the axial direction of the first beam section; a concrete layer is poured in the steel pipe of the first beam section, the steel mesh is buried in the concrete layer, and the top of the concrete layer is flush with the upper end of the steel pipe; the concrete layer of the first beam section is connected to the concrete layer of the second beam section. The beneficial effects of the utility model are: the utility model can greatly reduce the gap between the steel pipe and the concrete, improve the density of the concrete in the steel pipe, and ensure the quality of the pouring construction.

Description

Technical Field

[0001] The utility model relates to a building component, in particular to a segmented steel tube concrete beam structure. Background Art

[0002] Rectangular steel tube concrete beams have the advantages of high strength, factory production, and good seismic performance, and are widely used in various construction occasions. However, the existing rectangular steel tube concrete requires pouring concrete into the rectangular steel tube on site during the construction process. Since closed steel tube components are used, pouring is very difficult, and it is easy to pour loosely, and gaps may occur between the steel tube and the concrete; and the concrete pouring process cannot be observed in real time, resulting in the difficulty in controlling the density of the concrete, affecting the stability of the components, thereby reducing the construction quality, and in serious cases causing safety accidents.

[0003] Therefore, it is necessary to improve the prior art. Summary of the invention

[0004] The utility model aims to provide a segmented steel tube concrete beam structure to improve the density of concrete in the steel tube and ensure the construction quality, in view of the shortcomings of the prior art.

[0005] The technical solution adopted by the utility model is: a segmented steel tube concrete beam structure, comprising a first beam segment and two second beam segments arranged coaxially;

[0006] The two second beam sections are symmetrically arranged at both ends of the first beam section, and the three are connected end to end in sequence;

[0007] The second beam section is a concrete-filled steel tube beam;

[0008] The first beam section comprises a steel pipe, a steel mesh and a concrete layer;

[0009] Both ends of the steel pipe of the first beam section are connected to the ends of the steel pipe of the second beam section;

[0010] The top of the steel pipe of the first beam section is open, and a steel mesh is arranged below the opening, and the steel mesh is arranged to penetrate along the axial direction of the first beam section;

[0011] A concrete layer is poured inside the steel pipe of the first beam section, the steel mesh is buried in the concrete layer, and the top of the concrete layer is flush with the upper end of the steel pipe;

[0012] The concrete layer of the first beam section is connected to the concrete layer of the second beam section.

[0013] According to the above scheme, both ends of the steel mesh are bent upward respectively, and the bent sections are connected to the inner wall of the steel pipe of the second beam section.

[0014] According to the above scheme, the steel mesh is composed of multiple vertical steel bars and compressive steel bars, wherein the vertical steel bars are arranged at intervals along the axial direction of the first beam section; the compressive steel bars are fixed on both sides of the vertical steel bars, and the two ends of the compressive steel bars are bent upward and connected to the inner wall of the steel pipe of the second beam section.

[0015] According to the above scheme, the connection length between the compressive steel bar and the steel pipe of the second beam section shall not be less than 5d, where d is the diameter of the compressive steel bar.

[0016] According to the above scheme, the second beam section is a rectangular steel tube concrete beam, and the steel tube of the second beam section is a rectangular steel tube, which is surrounded by a bottom plate, a top plate and two side plates.

[0017] According to the above solution, the first beam section is a beam section with a rectangular cross section, and the steel pipe of the first beam section is surrounded by a bottom plate and two side plates.

[0018] According to the above scheme, an exhaust hole is opened on the top of the steel pipe of the second beam section.

[0019] According to the above scheme, a plurality of bolts are arranged at intervals on the inner wall of the steel pipe of the first beam section, and the bolts are welded and fixed to the bottom plate and the two side plates of the steel pipe.

[0020] According to the above scheme, a plurality of bolts are arranged at intervals on the inner wall of the steel pipe of the second beam section, and the bolts are welded and fixed to the bottom plate, the top plate and the two side plates of the steel pipe.

[0021] According to the above scheme, the diameter of the erected steel bars is 8 to 10 mm.

[0022] The beneficial effects of the utility model are:

[0023] 1. The utility model cancels the steel pipe top plate in the second beam section located at the compression position in the middle of the beam span, adopts a steel mesh, and pours concrete from the steel mesh in the compression zone of the beam surface and vibrates it. This design can greatly reduce the gap between the steel pipe and the concrete, improve the density of the concrete in the steel pipe, ensure the quality of the pouring construction, improve the stability of the entire component, and make it safe and reliable.

[0024] 2. The steel pipes in the utility model can be prefabricated in the factory, and the formwork can be eliminated on site. There is no need to reserve pouring holes or to seal them, which simplifies the process, improves the construction efficiency, effectively shortens the construction period, and reduces the construction cost.

[0025] 3. The utility model can reduce the usage of steel materials and reduce construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model.

[0027] Figure 2 for Figure 1 Top view of the .

[0028] Figure 3 for Figure 1 AA section view in.

[0029] Figure 4 for Figure 1 BB section view in.

[0030] Figure numerals: 1- erection steel bars; 2- compression steel bars; 3- steel pipes; 3.1, top plate; 3.2, bottom plate; 3.3, side plates; 4- concrete layer; 5- bolts; 6- exhaust holes; 7, first beam section; 8, second beam section. DETAILED DESCRIPTION

[0031] In order to better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figure 1-2 A segmented steel tube concrete beam structure shown includes a first beam segment 7 and two second beam segments 8 arranged coaxially;

[0033] The two second beam sections 8 are symmetrically arranged at both ends of the first beam section 7, and the three are connected end to end in sequence;

[0034] The second beam section 8 is a steel tube concrete beam;

[0035] The first beam section 7 comprises a steel pipe 3, a steel mesh and a concrete layer 4;

[0036] Both ends of the steel pipe 3 of the first beam section 7 are connected to the ends of the steel pipe 3 of the second beam section 8;

[0037] The top of the steel pipe 3 of the first beam section 7 is open, and a steel mesh is arranged below the opening, and the steel mesh is arranged to penetrate the first beam section 7 along the axial direction;

[0038] A concrete layer 4 is poured inside the steel pipe 3 of the first beam section 7, the steel mesh is buried in the concrete layer 4, and the top of the concrete layer 4 is flush with the upper end of the steel pipe 3;

[0039] The concrete layer 4 of the first beam section 7 is connected to the concrete layer 4 of the second beam section 8 .

[0040] In the utility model, the steel pipe 3 of the first beam section 7 is a U-shaped cross-section steel pipe with an open top; the steel pipe 3 of the first beam section 7 is connected to the end of the steel pipe 3 of the second beam section 8 to form an integrated structure; the concrete layer 4 of the first beam section 7 and the concrete layer 4 of the second beam section 8 are an integrated structure.

[0041] Preferably, both ends of the steel mesh are bent upwards respectively, and the bent sections are connected to the inner wall of the steel pipe 3 of the second beam section 8 .

[0042] In the utility model, the steel mesh is a bidirectional steel mesh; the steel mesh is formed by connecting a plurality of upright steel bars 1 and compression steel bars 2, wherein the upright steel bars 1 are arranged at intervals along the axial direction of the first beam section 7, with a spacing of 200 mm; the compression steel bars 2 are fixed on both sides of the upright steel bars 1, and the two ends of the compression steel bars 2 are bent upward, and the bent section is connected to the inner wall of the steel pipe 3 of the second beam section 8 (can be welded on both sides), and the connection length is not less than 5d, where d is the diameter of the compression steel bar 2. In this embodiment, the distance from the outer surface of the upright steel bar 1 to the top surface of the first beam section 7 is the thickness of the steel bar protective layer; the diameter of the upright steel bar 1 is 8 to 10 mm.

[0043] In the present invention, the setting of the steel mesh is conventional technology in the industry and will not be repeated here.

[0044] Preferably, the second beam section 8 is a rectangular steel tube concrete beam, such as Figure 4 As shown, the steel pipe 3 of the second beam section 8 is a rectangular steel pipe 3, which is surrounded by a bottom plate 3.2, a top plate 3.1 and two side plates 3.3; correspondingly, as shown in Figure 3 As shown, the first beam section 7 is also a beam section with a rectangular cross-section. The steel pipe 3 of the first beam section 7 is surrounded by a bottom plate 3.2 and two side plates 3.3. The end of the steel mesh is fixedly connected to the inner surface of the top plate 3.1 of the steel pipe 3 of the second beam section 8.

[0045] In the utility model, each bottom plate 3.2 and each side plate 3.3 of the steel pipe 3 of the three beam sections are correspondingly connected in sequence and form an integrated structure.

[0046] Preferably, an exhaust hole 6 is provided at the top of the steel pipe 3 of the second beam section 8 for exhausting the inside of the pipe during construction of concrete.

[0047] Preferably, a plurality of studs 5 are arranged at intervals on the inner wall of the steel pipe 3 of the first beam section 7 . Specifically, the studs 5 are fixed to the bottom plate 3 . 2 and the two side plates 3 . 3 of the steel pipe 3 by welding.

[0048] Preferably, a plurality of studs 5 are arranged at intervals on the inner wall of the steel pipe 3 of the second beam section 8 . Specifically, the studs 5 are welded and fixed to the bottom plate 3 . 2 , the top plate 3 . 1 and the two side plates 3 . 3 of the steel pipe 3 .

[0049] The construction process of the utility model is as follows: according to the compressive range of the beam surface in the middle of the span of the beam, the length of the first beam section 7 is designed (which can be one third of the total length of the beam); and according to the length of the first beam section 7, the top plate 3.1 of the steel pipe 3 at the position of the first beam section 7 is cancelled, and the steel pipe 3 structure and the steel mesh of the entire beam are prefabricated in the factory; the prefabricated steel pipe 3 structure is transported to the site for installation, and after the installation is completed, concrete is poured into the steel pipe 3, and then the steel mesh is tied at the designed position of the steel pipe, and concrete is poured from the steel mesh in the compressive zone of the beam surface and vibrated to form a concrete layer 4.

[0050] According to the force principle analysis of the beam component (at the support, the upper part of the beam is under tension and the lower part is under compression; at the mid-span, the lower part of the beam is under tension and the upper part is under compression), the compressive strength of pure concrete or reinforced concrete can meet the demand in the upper compression section of the mid-span of the beam, and there is no need to use higher-strength steel. The upper flange of the steel tube concrete beam at the mid-span fails to give full play to the high-strength advantage of steel. Therefore, the top plate 3.1 of the steel tube 3 is removed from the first beam section 7 located at the compression position in the mid-span of the beam, and a steel mesh is used. Concrete is poured inward from the steel mesh in the compression zone of the beam surface and vibrated. This design can greatly reduce the gap between the steel tube 3 and the concrete, improve the density of the concrete in the steel tube 3, ensure the quality of the pouring construction, improve the stability of the entire component, and be safe and reliable. The utility model can be constructed on site without formwork, which is simple and convenient, and can be constructed on site without formwork.

[0051] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A segmented steel tube concrete beam structure, characterized in that: comprising a first beam section and two second beam sections arranged coaxially; The two second beam sections are symmetrically arranged at both ends of the first beam section, and the three are connected end to end in sequence; The second beam section is a concrete-filled steel tube beam; The first beam section comprises a steel pipe, a steel mesh and a concrete layer; Both ends of the steel pipe of the first beam section are connected to the ends of the steel pipe of the second beam section; The top of the steel pipe of the first beam section is open, and a steel mesh is arranged below the opening, and the steel mesh is arranged to penetrate the first beam section along the axial direction; A concrete layer is poured inside the steel pipe of the first beam section, the steel mesh is buried in the concrete layer, and the top of the concrete layer is flush with the upper end of the steel pipe; The concrete layer of the first beam section is connected to the concrete layer of the second beam section.

2. The segmented steel tube concrete beam structure according to claim 1, characterized in that: The two ends of the steel mesh are bent upwards respectively, and the bent sections are connected to the inner wall of the steel pipe of the second beam section.

3. The segmented steel tube concrete beam structure according to claim 2, characterized in that: The steel mesh is composed of a plurality of vertical steel bars and compression steel bars, wherein the vertical steel bars are arranged at intervals along the axial direction of the first beam section; the compression steel bars are fixed on both sides of the vertical steel bars, and both ends of the compression steel bars are bent upward and connected to the inner wall of the steel pipe of the second beam section.

4. The segmented steel tube concrete beam structure according to claim 3, characterized in that: The connection length between the compressive reinforcement and the steel pipe of the second beam section shall not be less than 5d, where d is the diameter of the compressive reinforcement.

5. The segmented steel tube concrete beam structure according to claim 1, characterized in that: The second beam section is a rectangular steel tube concrete beam, the steel tube of the second beam section is a rectangular steel tube, and is surrounded by a bottom plate, a top plate and two side plates.

6. The segmented steel tube concrete beam structure according to claim 5, characterized in that: The first beam section is a beam section with a rectangular cross section, and the steel pipe of the first beam section is surrounded by a bottom plate and two side plates.

7. The segmented steel tube concrete beam structure according to claim 5, characterized in that: An exhaust hole is opened on the top of the steel pipe of the second beam section.

8. The segmented steel tube concrete beam structure according to claim 5, characterized in that: A plurality of bolts are arranged at intervals on the inner wall of the steel pipe of the first beam section, and the bolts are welded and fixed to the bottom plate and two side plates of the steel pipe.

9. The segmented steel tube concrete beam structure according to claim 6, characterized in that: A plurality of bolts are arranged at intervals on the inner wall of the steel pipe of the second beam section, and the bolts are welded and fixed to the bottom plate, the top plate and the two side plates of the steel pipe.

10. The segmented steel tube concrete beam structure according to claim 3, characterized in that: The diameter of the erecting steel bars is 8 to 10 mm.

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