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

Abstract

The invention relates to a special-shaped steel composite beam stirrup structure and a construction method thereof, and the structure comprises a composite beam which comprises an inner beam and outer beams arranged on the two sides of the middle part of the inner beam; the split type stirrup is arranged along the full length of the inner beam and comprises an upper stirrup and a lower stirrup which are connected with each other, and a coating cavity used for coating the inner beam is formed between the upper stirrup and the lower stirrup; one end of the upper opening stirrup is connected with the middle of the inner beam through a lap joint plate, and the other end of the upper opening stirrup is folded to connect the inner beam and the outer beams on the two sides of the inner beam into a whole; the beam end stirrups are arranged at the two ends of the inner beam. The stirrup used for connecting the middle of the inner beam is changed into a split type from a traditional integrated type, so that all structures of the inner beam are connected into a whole; meanwhile, the upper opening stirrup is adopted to connect the upper portion of the inner beam with the outer beam around the inner beam, compared with a traditional stirrup structure, hooks do not need to be manufactured during construction, the site construction difficulty is lowered, 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 reducing the weight of the beams and reducing materials. It can also make the beams more integrated and improve the earthquake resistance of the building.

[0003] During the construction of the project, due to design requirements, a building form combining special-shaped steel composite beams and floor slabs was adopted. The special-shaped steel and the steel bars arranged around it formed an inner beam, and W-shaped steel bars were 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 were 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 penetrated 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: A composite beam, the composite beam comprising an inner beam and outer beams arranged on both sides of the middle portion; Split stirrups, which are arranged along the entire length of the inner beam, and include upper stirrups and lower stirrups that are connected to each other, and a covering cavity for covering the inner beam is formed between the upper stirrups and the lower stirrups; An upper stirrup, 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 thereof into a whole; Beam end stirrups are installed at both ends of the inner beam.

[0006] 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 steel bars are arranged above the arched steel along its entire length, lower steel bars are arranged below the arched steel along its entire length, and beam side steel bars are arranged on both sides along its entire length.

[0007] 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. As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam in the present invention, the upper steel bar includes a first connection part, which is connected to the upper steel bar through a wire tie, and both sides of the first connection part are folded to the same side to form a second connection part.

[0008] As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam in the present invention, the lower structure 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 connecting part of the upper steel bar.

[0009] As a preferred embodiment of the stirrup structure of the special-shaped steel composite beam 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 extends along the lateral direction of the arched steel. A plurality of lap plates are arranged in an arc shape at intervals along the middle 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 outer beam includes a connecting rib, which includes an arc-shaped portion, the arc-shaped portion is connected to the upper stirrup, and both ends of the arc-shaped portion are provided with raised connecting portions.

[0011] 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 separately arranged at the arched steel connection, one end of which is welded to the lap plate, and the other end of which is folded and welded to the corresponding connecting stirrup, and a plurality of groups of the upper stirrups are arranged at intervals along the full length of the composite beam.

[0012] A construction method of the special-shaped steel composite beam stirrup structure comprises the following steps: Arch steel installation; Installation of upper and lower steel bars; During the installation of split stirrups, the upper stirrups and the lower stirrups are welded firmly, so that the arched steel, the upper reinforcement and the lower reinforcement form a composite beam; Lap board installation; The upper stirrups are installed to connect the upper part of the composite beam and the floor slab reinforcements on both sides into a whole; Pouring concrete.

[0013] 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, the lower stirrups and the stirrups should meet the requirements of the specifications.

[0014] Beneficial effects of the present invention: 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 connecting 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, there is no need to make hooks during construction, which reduces the difficulty of on-site construction and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0016] 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; Figure 2 This is a schematic longitudinal section diagram of the composite beam and the top plate when they are connected in the embodiment of the present application; Figure 3 A side view of the connection between the lap plate and the arched steel in the embodiment of the present application; Description of reference numerals: 1. Inner beam; 2. External beam; 3. Split stirrups; 4. Upper stirrups; 5. Beam end stirrups; 6. Lap plate; 7. Arched steel; 8. Upper steel bar; 9. Bottom steel bar; 10. Beam side reinforcement; 11. Connecting ribs. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0018] 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 referred device or element 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.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0020] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature 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. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] 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 a central 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 a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0023] Example This embodiment provides a special-shaped steel composite beam stirrup structure, such as Figure 1 As shown, it includes a composite beam, a split stirrup 3, an upper stirrup 4 and a beam end stirrup 5. The upper part of the composite beam is located in the top plate, and it 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 stirrup 3 is used to connect the middle parts of the various structures constituting the inner beam 1 as a whole; the upper stirrup 4 is used to connect the outer beam 2 at the upper part of the inner beam 1 with the inner beam 1 as a whole; the beam end stirrup 5 is used to connect the two ends of the various structures constituting the inner beam 1 as a whole.

[0024] like Figure 2 As shown, the inner beam 1 includes an arched steel 7, an upper steel bar 8 is arranged along its length above the arched steel 7, a lower steel bar 9 is arranged along its length below the arched steel 7, and beam side steel bars 10 are arranged along its length on both sides. The arched steel 7, upper steel bar 8, lower steel bar 9 and beam side steel bars 10 in the middle part of the inner beam 1 are interconnected by split stirrups 3 to form an integral structure.

[0025] 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.

[0026] 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, and the split stirrups 3 include multiple groups, and the multiple groups of split stirrups 3 are arranged at intervals along the entire length of the composite beam.

[0027] 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, and both sides of the first connection portion are folded to the same side to form a second connection portion for connecting to the lower stirrups.

[0028] 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 connecting 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.

[0029] The lap plates 6 are symmetrically arranged on both sides of the arched steel 7. The lap plates 6 are metal plates made of the same material as the arched steel 7. A plurality of lap plates 6 are arranged in an arc shape convex upward along the middle of the length of the arched steel 7. 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 in the transverse direction of the arched steel 7. It is used to fix the upper stirrup 4 and make the steel bars in the outer beam 2 fit the middle structure of the arched steel 7 more closely, so that the composite beam is more evenly stressed.

[0030] The outer beam 2 includes a plurality of connecting ribs 11, which include an arc-shaped portion, which is connected to the upper hoop 4, and has raised connecting portions at both ends connected to the top plate steel bars. The arc-shaped portion of the connecting rib 11 is connected to the inner beam 1 through the upper steel bar 8, and the connecting portions at both ends are connected to the top plate steel bars. This structure facilitates increasing the contact area between the composite beam and the top plate and improving the overall structural strength.

[0031] The upper stirrups 4 are arranged in multiple groups at intervals along the middle of the full 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 plates 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.

[0032] This embodiment also provides a construction method of the above-mentioned special-shaped steel composite beam stirrup structure, comprising the following steps: 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.

[0033] 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, and the upper two ends of the inner beam 1 and the second connecting 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 group of inner beams 1.

[0034] The lap plates 6 are installed, starting from one end of the arched steel 7, and each group of lap plates 6 is welded in sequence, so that the lap plates 6 are firmly welded to both sides of the arched steel 7, and they are distributed in an arc shape along the entire length of the arched steel 7.

[0035] In this embodiment, during the welding process when installing the split stirrups 3 and the upper stirrups 4, the lap 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.

[0036] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0037] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A stirrup structure of a special-shaped steel composite beam, characterized in that: include: A composite beam, the composite beam comprising an inner beam and outer beams arranged on both sides of the middle portion; Split stirrups, which are arranged along the entire length of the inner beam, and include upper stirrups and lower stirrups that are connected to each other, and a covering cavity for covering the inner beam is formed between the upper stirrups and the lower stirrups; An upper stirrup, 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 thereof into a whole; Beam end stirrups are installed at both ends of the inner beam.

2. The stirrup structure of special-shaped steel composite beam according to claim 1 is characterized in that: The inner beam comprises an arched steel, an upper reinforcement is arranged on the upper part of the arched steel along its entire length, a lower reinforcement is arranged on the lower part of the arched steel along its entire length, and beam side reinforcements are arranged on both sides along its entire length.

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

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

5. The stirrup structure of special-shaped steel composite beam according to claim 1, characterized in that: The lower structure is U-shaped, the lower part of which cooperates with the lower part of the arched steel to cover the lower steel bar, and the two ends of the upper part are welded and connected to the second connecting part of the upper steel bar.

6. The stirrup structure of special-shaped steel composite beam according to claim 1, characterized in that: 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. Multiple groups of the lap plates are arranged in an arc shape at intervals along the middle of the inner beam.

7. The stirrup structure of special-shaped steel composite beam according to claim 1, characterized in that: The outer beam includes a connecting rib, which includes an arc-shaped portion, the arc-shaped portion is connected to the upper hoop reinforcement, and both ends of the arc-shaped portion are provided with raised connecting portions.

8. The stirrup structure of special-shaped steel composite beam according to claim 1, characterized in that: The upper stirrups include a pair of connecting stirrups, which are separately arranged at the arched steel connection, one end of which is welded to the lap plate, and the other end of which is folded and welded to the corresponding connecting stirrups. Multiple groups of the upper stirrups are arranged at intervals along the full length of the composite beam.

9. A construction method for the stirrup structure of a special-shaped steel composite beam according to any one of claims 1 to 8, characterized in that: The steps include: Arch steel installation; Installation of upper and lower steel bars; During the installation of split stirrups, the upper stirrups and the lower stirrups are welded firmly, so that the arched steel, the upper reinforcement and the lower reinforcement form a composite beam; Lap board installation; The upper stirrups are installed to connect the upper part of the composite beam and the floor slab reinforcements on both sides into a whole; Pouring concrete.

10. The construction method of the stirrup structure of the special-shaped steel composite beam according to claim 9 is characterized in that: During the installation and welding of split stirrups and upper stirrups, the lap lengths of the upper stirrups, lower stirrups and stirrups should comply with the requirements of the specifications.

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