Special-shaped steel composite beam stirrup structure and construction method thereof

Abstract

The application relates to a special-shaped steel combined beam stirrup structure and a construction method thereof. The structure comprises a combined beam, the combined beam comprising an inner beam and outer beams arranged on both sides of the middle part of the inner beam; a split stirrup arranged along the length of the inner beam, the split stirrup comprising an upper stirrup and a lower stirrup connected with each other, a covering cavity for covering the inner beam being formed between the upper stirrup and the lower stirrup; an upper mouth stirrup, one end of the upper mouth stirrup being connected with the middle part of the inner beam through a lap plate, the other end of the upper mouth stirrup being folded, and the inner beam and the outer beams on both sides of the inner beam being connected as a whole; and beam end stirrups arranged at both ends of the inner beam. The stirrup for connecting the middle part of the inner beam is changed from the traditional integrated type into a split type, so that the structures of the inner beam are connected as a whole; meanwhile, the upper part of the inner beam is connected with the surrounding outer beams through the upper mouth stirrup, compared with the traditional stirrup structure, a hook does not need to be made during construction, the on-site construction difficulty is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of steel structures, and in particular to a special-shaped steel composite beam stirrup structure and a construction method thereof. Background Art

[0002] In large-span beams, the use of steel composite beams can not only greatly improve the load-bearing capacity of the beams, but also reduce the cross-sectional size of the large-span beams, thereby achieving the purpose of reducing the weight of the beams and reducing materials. It can also make the beams more integrated and improve the seismic resistance of the building.

[0003] During the project construction process, due to the design requirements of adopting a building form that combines special-shaped steel composite beams and floor slabs, the special-shaped steel and the steel bars arranged around it form an inner beam, and W-shaped steel bars are arranged on both sides of the middle to form an outer beam. The upper part of the inner beam and the outer beam connected to it are buried inside the top plate structure. The structure has a large span and the steel bars and stirrups used are large in size. Due to the limitations of this structure, the traditional stirrup structure cannot be installed when fixing the inner beam and the connection between the inner beam and the outer beam, resulting in the inner beam and the connection between the inner beam and the outer beam being unable to be firmly connected, affecting the structural performance. Summary of the Invention

[0004] Based on this, it is necessary to provide a special-shaped steel composite beam stirrup structure and a construction method thereof to overcome the defects mentioned in the above background technology.

[0005] A special-shaped steel composite beam stirrup structure, comprising:

[0006] A composite beam, comprising an inner beam and outer beams provided on both sides of the middle portion;

[0007] Split stirrups are arranged along the entire length of the inner beam and include upper and lower stirrups connected to each other, with a covering cavity formed between the upper and lower stirrups for covering the inner beam;

[0008] Upper stirrups, one end of which is connected to the middle of the inner beam through a lap plate, and the other end of which is folded over to connect the inner beam and the outer beams on both sides into a whole;

[0009] Beam end stirrups are installed at both ends of the inner beam.

[0010] As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam in the present invention, the inner beam includes an arched steel, upper reinforcement bars are arranged above the arched steel along its entire length, lower reinforcement bars are arranged below the arched steel along its entire length, and beam side reinforcement bars are arranged on both sides along its entire length.

[0011] As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam in the present invention, the ends of the arched steel are connected to the main structures on both sides.

[0012] As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam in the present invention, the upper stirrup includes a first connection portion, which is connected to the upper steel bar through a wire tie, and both sides of the first connection portion are folded to the same side to form a second connection portion.

[0013] As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam in the present invention, the lower stirrup is U-shaped, the lower part of which cooperates with the lower part of the arched steel to wrap the lower steel bar therein, and the two ends of the upper part are welded to the second connection part of the upper stirrup.

[0014] As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam described in the present invention, the lap plates are symmetrically arranged on both sides of the arched steel, one end of which is welded to the arched steel, and the other end of which extends along the transverse direction of the arched steel. The lap plates are arranged in multiple groups in an arc-shaped manner at intervals along the middle of the inner beam.

[0015] As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam in the present invention, the outer beam includes a connecting rib, which includes an arc-shaped portion connected to the upper stirrup, and has raised connecting portions at both ends.

[0016] As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam in the present invention, the upper stirrups include a pair of connecting stirrups, which are arranged on both sides of the arched steel, one end of which is welded to the lap plate, and the other end is folded and welded to the corresponding connecting stirrups. Multiple groups of upper stirrups are arranged at intervals along the length of the composite beam.

[0017] A construction method of the special-shaped steel composite beam stirrup structure comprises the following steps:

[0018] Arch steel installation;

[0019] Installation of upper and lower steel bars;

[0020] The split stirrups are installed by welding the upper stirrups and the lower stirrups firmly, so that the arched steel, the upper reinforcement and the lower reinforcement form the inner beam;

[0021] Lap plate installation;

[0022] The upper stirrups are installed to connect the upper portion of the inner beam and the outer beams on both sides thereof into a whole;

[0023] Pouring concrete.

[0024] As a preferred construction method of the stirrup structure of the special-shaped steel composite beam described in the present invention, during the installation and welding of the split stirrups and the upper stirrups, the lap lengths of the upper stirrups, lower stirrups and connecting stirrups should meet the requirements of the specifications.

[0025] Beneficial effects of the present invention:

[0026] The present invention changes the stirrups used to connect the middle part of the inner beam from the traditional integrated type to a split type, so as to facilitate the connection of the various structures of the inner beam into a whole; at the same time, the upper stirrups are used to connect the upper part of the inner beam with the outer beams around it. Compared with the traditional stirrup structure, no hooks need to be made during construction, which reduces the difficulty of on-site construction and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a cross-sectional schematic diagram of the stirrup structure of the special-shaped steel composite beam in the embodiment of the present application;

[0029] Figure 2 This is a schematic longitudinal section diagram of the connection between the composite beam and the top plate in the embodiment of the present application;

[0030] Figure 3 This is a side view of the connection between the lap plate and the arched steel in the embodiment of the present application;

[0031] Description of reference numerals:

[0032] 1. Inner beam;

[0033] 2. External beam;

[0034] 3. Split stirrups;

[0035] 4. Upper stirrups;

[0036] 5. Beam end stirrups;

[0037] 6. Lap plate;

[0038] 7. Arched steel;

[0039] 8. Upper steel bar;

[0040] 9. Bottom steel bar;

[0041] 10. Beam side reinforcement;

[0042] 11. Connecting ribs. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0046] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0049] Example

[0050] This embodiment provides a special-shaped steel composite beam stirrup structure, such as Figure 1 As shown, it includes a composite beam, split stirrups 3, upper stirrups 4 and beam end stirrups 5. The upper part of the composite beam is located in the top plate, which includes an inner beam 1 and an outer beam 2. The outer beam 2 is arranged on both sides of the middle part of the inner beam 1; the split stirrups 3 are used to connect the middle parts of the various structures constituting the inner beam 1 into a whole; the upper stirrups 4 are used to connect the outer beam 2 at the upper part of the inner beam 1 and the inner beam 1 into a whole; the beam end stirrups 5 are used to connect the two ends of the various structures constituting the inner beam 1 into a whole.

[0051] like Figure 2 As shown, the inner beam 1 includes an arched steel 7, an upper steel bar 8 is arranged above the arched steel 7 along its entire length, a lower steel bar 9 is arranged below the arched steel 7 along its entire length, and beam side steel bars 10 are arranged on both sides along their entire length. The arched steel 7, upper steel bar 8, lower steel bar 9 and beam side steel bars 10 in the middle of the inner beam 1 are interconnected by split stirrups 3 to form an integral structure.

[0052] In this embodiment, the ends of the arched steel sections 7 are connected to the main structures on both sides before the reinforcement bars are tied to the composite beam, so as to facilitate its fixation.

[0053] The split stirrups 3 include upper stirrups and lower stirrups. The lower part of the upper stirrups and the upper part of the lower stirrups are connected to each other, forming a connecting cavity for connecting the composite beam. The split stirrups 3 include multiple groups, and the multiple groups of split stirrups 3 are arranged at intervals along the full length of the composite beam.

[0054] In this embodiment, the upper stirrups include a first connection portion, which is arranged parallel to the transverse direction of the composite beam and is connected to the upper steel bar 8 through a wire tie. The two sides of the first connection portion are folded toward the same side to form a second connection portion for connecting to the lower stirrups.

[0055] In this embodiment, the lower structure is U-shaped, and its lower part cooperates with the lower part of the arched steel 7 to cover the lower steel bar 9 therein to fix the lower steel bar 9. The upper two ends of the lower stirrups are welded to the second connection part of the upper steel bar, and a covering cavity for covering the inner beam is formed between the upper stirrups and the lower stirrups to constrain and fix the composite beam.

[0056] The lap plates 6 are symmetrically arranged on both sides of the arched steel 7. Made of the same metal as the arched steel 7, the lap plates 6 are arranged in multiple groups along the middle of the arched steel 7 in an upwardly convex arc shape. Each group includes two lap plates 6 symmetrically arranged along the arched steel 7. One end of the lap plate 6 is welded to the lower flange of the arched steel 7, and the other end extends transversely to the arched steel 7. They are used to secure the upper stirrups 4 and ensure that the steel bars in the outer beam 2 are more closely aligned with the middle structure of the arched steel 7, resulting in a more uniform stress distribution on the composite beam.

[0057] The outer beam 2 includes a plurality of connecting bars 11, each of which includes an arcuate portion connected to the upper stirrup 4 and has raised connecting portions at both ends for connection to the top plate reinforcement. The arcuate portion of the connecting bar 11 is connected to the inner beam 1 via the upper reinforcement 8, and the connecting portions at both ends are connected to the top plate reinforcement. This structure facilitates increasing the contact area between the composite beam and the top plate, improving the overall structural strength.

[0058] The upper stirrups 4 are arranged in multiple groups at intervals along the middle of the length of the arched steel 7, and each group of upper stirrups 4 includes one or a pair of connecting stirrups. When one connecting stirrup is used, one end thereof is welded to the lap plate 6, and the other end thereof is folded 360 degrees to cover the upper part of the inner beam 1 and the surrounding part of the outer beam 2 and then welded to another lap plate 6 in the same group; when a pair of connecting stirrups is used, a pair of connecting stirrups are arranged on both sides of the composite beam, one end of a pair of connecting stirrups are respectively welded to the lap plate 6 of the same group, and the other ends of a pair of connecting stirrups are folded and connected to each other, covering the upper part of the inner beam 1 and the surrounding part of the outer beam 2 to form a whole.

[0059] This embodiment also provides a construction method of the above-mentioned special-shaped steel composite beam stirrup structure, comprising the following steps:

[0060] The composite beam is installed by installing the arch steel 7, the upper reinforcement 8 and the lower reinforcement 9 according to the on-site construction process.

[0061] The installation of the split stirrups 3 starts from one side of the composite beam, and the upper stirrups and the upper steel bars 8 are tied firmly with wire in sequence. Then the lower stirrups are placed below the inner two 1 and on one side of the upper steel bars. The upper two ends of the inner beam 1 and the second connection part of the upper steel bars are welded firmly, so that the arched steel 7, the upper steel bars 8 and the lower steel bars 9 form a complete inner beam 1.

[0062] The lap plates 6 are installed starting from one end of the arched steel 7 and welding each group of lap plates 6 in sequence so that the lap plates 6 are firmly welded to both sides of the arched steel 7 and are distributed in an arc shape along the entire length of the arched steel 7.

[0063] In this embodiment, during the welding process when installing the split stirrups 3 and the upper stirrups 4, the overlap lengths of the upper stirrups, the lower stirrups and the connecting stirrups should meet the requirements of the specification to avoid a reduction in structural strength.

[0064] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A special-shaped steel composite beam stirrup structure, characterized in that: include: A composite beam, comprising an inner beam and outer beams provided on both sides of the middle portion; Split stirrups are arranged along the entire length of the inner beam and include upper and lower stirrups connected to each other, with a covering cavity formed between the upper and lower stirrups for covering the inner beam; Upper stirrups, one end of which is connected to the middle of the inner beam through a lap plate, and the other end of which is folded over to connect the inner beam and the outer beams on both sides into a whole; Beam end stirrups, which are provided at both ends of the inner beam; The inner beam comprises an arched steel, which is a special-shaped steel. An upper reinforcement bar is arranged along the entire length of the arched steel above the arched steel, a lower reinforcement bar is arranged along the entire length of the arched steel below the arched steel, and beam side reinforcement bars are arranged along the entire length of both sides of the arched steel. The lap plates are symmetrically arranged on both sides of the arched steel, one end of which is welded to the arched steel, and the other end of which extends in the transverse direction of the arched steel. Multiple groups of the lap plates are arranged in an arc shape at intervals along the middle of the inner beam; The outer beam includes a connecting rib, which includes an arc-shaped portion connected to the upper stirrup, and has warped connecting portions at both ends; The upper stirrups include a pair of connecting stirrups, which are arranged on both sides of the arched steel. One end of the stirrups is welded to the lap plate, and the other end is folded and welded to the corresponding connecting stirrups. Multiple groups of the upper stirrups are arranged at intervals along the length of the composite beam.

2. The stirrup structure of special-shaped steel composite beam according to claim 1, characterized in that: The ends of the arched steel are connected to the main structures on both sides.

3. The stirrup structure of special-shaped steel composite beam according to claim 1, characterized in that: The upper stirrups include a first connection portion, which is connected to the upper steel bar through a wire tie, and both sides of the first connection portion are folded toward the same side to form a second connection portion.

4. The stirrup structure of special-shaped steel composite beam according to claim 3, characterized in that: The lower stirrup is U-shaped, and its lower part cooperates with the lower part of the arch steel to cover the lower steel bar therein, and its upper two ends are welded to the second connection part of the upper stirrup.

5. A construction method for the stirrup structure of a special-shaped steel composite beam according to any one of claims 1 to 4, characterized in that: The steps include: Arch steel installation; Installation of upper and lower steel bars; The split stirrups are installed by welding the upper stirrups and the lower stirrups firmly, so that the arched steel, the upper reinforcement and the lower reinforcement form an inner beam; Lap plate installation; The upper stirrups are installed to connect the upper part of the inner beam and the outer beams on both sides into a whole; Pouring concrete.

6. The construction method of the special-shaped steel composite beam stirrup structure according to claim 5, characterized in that: During the installation and welding of split stirrups and upper stirrups, the lap length of the upper stirrups, lower stirrups and connecting stirrups should comply with the requirements of the specifications.

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