Steel bar truss structure, laminated slab shear wall and manufacturing method of laminated slab shear wall
By welding and fixing single-piece trusses and using airbags to cushion high-bar trusses, the problem of low production efficiency of steel bar truss in the existing technology is solved, and efficient and stable production of stacked plate shear walls is achieved, which reduces production costs and equipment investment.
Patent Information
- Application Number
- CN202411521872.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2024-12-13
AI Technical Summary
When making stacked plate shear walls, existing steel bar trusses have low working efficiency and require multiple binding and flipping of mold tables, which increases production costs and equipment investment.
Multiple single-piece trusses are used to fix them by welding and welding the distributed bars to form a continuous steel bar truss structure to avoid on-site binding, and use airbags to raise the steel bar truss when pouring concrete to achieve pouring without flipping the mold table.
Improve production efficiency, ensure the firmness and geometric accuracy of the steel bar trusses, reduce the risk of connecting point trips, save energy and improve construction quality.
Smart Images
Figure CN119122202A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of prefabricated buildings, and in particular to a steel bar truss structure, a composite plate shear wall and a manufacturing method thereof. Background Art
[0002] Steel trusses are a common structural component used in construction projects. They are mainly used in floors, roofs and other structures that need to support large loads. Steel trusses can significantly improve the load-bearing capacity and stability of structures by arranging steel bars in the form of trusses. Steel trusses are composed of upper chord steel bars, lower chord steel bars and web bars. These steel bars are connected together by welding or tying to form a triangular grid structure.
[0003] At present, the steel trusses on the market are composed of one upper chord steel bar and two lower chord steel bars connected by web bars, and are mostly used to make composite slabs and floor decking. The purpose is single, the upper force-bearing steel bars need to be tied later, and are located below the upper chord bars, and the efficiency of the later steel bars is very low. For example, in the subsequent processing and production of composite slab shear walls, the processing steps include: tying the steel bars and truss steel bars in the prefabricated slab on one side, supporting the formwork, pouring concrete, curing and forming, turning over the prefabricated slab, and embedding it in the concrete on the other side. It is necessary to tie the steel bars twice, support the formwork twice, pour concrete twice, and maintain twice. In particular, the production process requires large-scale equipment such as the flipping formwork, which greatly increases the capital investment of the enterprise.
[0004] Therefore, it is urgent to provide a solution of a steel truss structure. Summary of the invention
[0005] In order to solve the above problems, the technical solution of the present invention provides a steel truss structure, a composite plate shear wall and a manufacturing method thereof, which can improve work efficiency and facilitate mass production.
[0006] According to a first aspect of the technical solution of the present invention, there is provided a steel bar truss structure, comprising a plurality of monolithic trusses;
[0007] The single-piece truss comprises: an upper chord and a lower chord arranged in parallel and at a certain distance; a supporting steel bar, which is vertically welded to both ends of the upper chord and the lower chord to seal both ends of the upper chord and the lower chord; a web bar, which is obliquely arranged between the upper chord and the lower chord, and is welded and fixed to the upper chord and the lower chord, wherein the web bar is a continuous broken line structure, and the inclination directions of two adjacent web bars are different;
[0008] Multiple single-piece trusses are arranged in parallel and fixed by welding through distribution ribs, multiple upper chord ribs and lower chord ribs are respectively perpendicular to the distribution ribs, and the distribution ribs connected to the upper chord ribs and the distribution ribs connected to the lower chord ribs can form a planar structure corresponding to each other in pairs, which is perpendicular to the upper chord ribs and the lower chord ribs.
[0009] In the above scheme, the web bars are axially symmetrically distributed along the vertical lines of the upper and lower chords on the plane formed by the upper and lower chords, and are distributed in a "w" shape or a "v" shape between the upper and lower chords.
[0010] In the above solution, the distribution ribs are respectively located on the inner sides of the upper chord ribs and the lower chord ribs.
[0011] In the above solution, the connection point between the distribution reinforcement and the upper chord reinforcement or the lower chord reinforcement is located in the bending structure formed by the web reinforcement.
[0012] In the above solution, the spacing between the single-piece trusses is 600-800 mm.
[0013] According to a second aspect of the technical solution of the present invention, a composite plate shear wall is provided, comprising a reinforced truss structure and a wall as described in any one of the above items, wherein the reinforced truss structure and the wall together form the shear wall, the upper chord and the lower chord of the reinforced truss structure are embedded in the wall, and the wall is concrete.
[0014] In the above solution, the wall has two layers, namely a first wall and a second wall, and the first wall and the second wall are arranged in parallel.
[0015] In the above solution, the upper chord reinforcement is embedded in the first wall, and the lower chord reinforcement is embedded in the second wall.
[0016] In the above solution, the thickness of the first wall and the second wall are 30-70 mm respectively.
[0017] According to a third aspect of the technical solution of the present invention, there is provided a method for manufacturing a composite plate shear wall as described above, comprising:
[0018] S1. Place a steel truss on a formwork platform, fix side formworks around it, pour concrete at the bottom of the steel truss to a preset height, and solidify the concrete;
[0019] S2, placing an air bag in the steel truss and inflating it, wherein the air bag is located on the upper part of the solidified concrete;
[0020] S3, pouring the concrete on the airbag until a preset height, and curing the concrete;
[0021] S4, deflate the airbag and extract it.
[0022] Beneficial effects of the present invention:
[0023] The present invention discloses a steel truss structure, a composite plate shear wall and a manufacturing method thereof. A plurality of single-piece trusses are connected by distribution bars to form a steel truss. There is no need for on-site binding, which improves production efficiency. The structure of the steel truss is more solid, which ensures that the connection points will not be disengaged during transportation, installation, concrete pouring and other links, and ensures that the geometric dimensions of the steel skeleton and the spatial structure are accurate. When manufacturing the composite plate shear wall, an air bag is used to raise the middle part of the steel truss, and concrete can be poured on the upper and lower sides to form a wall respectively. There is no need to flip the formwork table, which improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0025] Figure 1 A schematic diagram of a steel truss structure provided by the present invention;
[0026] Figure 2 A schematic diagram of a single truss of a steel truss structure provided by the present invention;
[0027] Figure 3 A schematic diagram of the composite plate shear wall provided by the present invention.
[0028] Among them, single-piece truss - 10; upper chord - 11; lower chord - 12; supporting steel bars 13; web bars - 14; steel truss - 20; distribution bars - 21; wall - 30.
[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0030] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0031] The terms "first", "second", etc. in the specification and claims of the present disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein, for example.
[0032] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.
[0033] Multiple includes two or more.
[0034] It should be understood that the term "and / or" used in this disclosure is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
[0035] like Figure 1 and Figure 2 As shown, an embodiment of the technical solution of the present invention provides a steel truss structure, including a plurality of single-piece trusses 10.
[0036] The single-piece truss 10 includes: an upper chord 11 and a lower chord 12 which are arranged in parallel and at a certain distance; a supporting steel bar 13 which is vertically welded to both ends of the upper chord 11 and the lower chord 12 to seal both ends of the upper chord 11 and the lower chord 12; a web bar 14 which is obliquely arranged between the upper chord 11 and the lower chord 12 and is welded and fixed to the upper chord 11 and the lower chord 12, and the web bar 14 is a continuous broken line structure, and the inclination directions of two adjacent web bars 14 are different.
[0037] A plurality of single-piece trusses 10 are arranged in parallel and fixed by welding through the distribution bars 21 to form a steel truss 20. A plurality of upper chord bars 11 and lower chord bars 12 are respectively perpendicular to the distribution bars 21, and the distribution bars 21 connected to the upper chord bars 11 and the distribution bars 21 connected to the lower chord bars 12 can form a planar structure corresponding to each other, which is perpendicular to the upper chord bars 11 and the lower chord bars 12.
[0038] In the present invention, multiple single-piece trusses 10 are welded through distribution bars 21 to form a steel truss 20, which avoids on-site binding and improves production efficiency. The structure of the steel truss 20 is more solid, ensuring that the connection points will not be disengaged during transportation, installation, concrete pouring and other links, and ensuring the geometric dimensions of the steel skeleton and the accuracy of the spatial structure.
[0039] In this embodiment, the web reinforcement 14 is preferably distributed in an axisymmetric manner along the vertical line of the upper chord 11 and the lower chord 12 on the plane formed by the upper chord 11 and the lower chord 12, and is distributed in a "w" shape or a "v" shape between the upper chord 11 and the lower chord 12. The bearing capacity and overall stability of the steel truss 20 are improved and the stress distribution is optimized, so that the load can be better and evenly transferred to the upper chord 11 and the lower chord 12 to avoid local stress concentration. The overall structure of the steel truss 20 is more stable. Furthermore, the angle formed by the web reinforcement 14 between the upper chord 11 and the lower chord 12 ranges from 30° to 75°, and preferably, the angle is 60°. The web reinforcement 14 forms an equilateral triangle structure with the upper chord 11 and the lower chord 12, which is more stable than other triangular equilateral triangle structures, thereby ensuring the overall stability and strength of the steel truss 20.
[0040] In this embodiment, the distribution ribs 21 are preferably located on the inner side of the upper chord ribs 11 and the lower chord ribs 12. Specifically, the connection point between the distribution ribs 21 and the upper chord ribs 11 is located in the bending structure formed by the web bars 14, or the connection point between the distribution ribs 21 and the lower chord ribs 12 is located in the bending structure formed by the web bars 14. The distribution ribs 21 are connected to the upper chord ribs 11 and the web bars 14, which increases the shear resistance of the distribution ribs 21 and improves the overall stability.
[0041] In this embodiment, the spacing between the single-piece trusses 10 is preferably 600-800 mm. Moreover, the web bars 14 and the upper and lower chord bars 11 and 12, the support bars 13 and the upper and lower chord bars 11 and 12, and the distribution bars 21 and the upper and lower chord bars 11 and 12 are all welded to form a multi-point tie of a 200*200 spacing grid, without the need for binding, which is convenient for subsequent processing to form a composite plate shear wall and ensure that there will be no mold explosion when pouring concrete. It also avoids deformation of the steel truss 20 due to trampling during the concrete pouring process, which affects the quality of the shear wall.
[0042] The specific method of welding the single truss 10 through the distribution bars 21 to form the steel truss 20 is as follows:
[0043] According to the designed spacing, the single-piece truss 10 is arranged using automated mechanical equipment, and the distribution reinforcement 21 is passed through the inner side of the upper chord reinforcement 11 and the lower chord reinforcement 12 of the single-piece truss 10 according to the designed spacing. Automatic welding equipment is used to clamp each intersection and weld it firmly to form a stable spatial grid structure, namely the steel truss 20.
[0044] like Figure 3As shown, an embodiment of the technical solution of the present invention provides a composite plate shear wall, including a steel truss 20 structure and a wall 30 as provided in the above embodiment, the steel truss 20 and the wall 30 together form a shear wall, and the upper chord 11 and the lower chord 12 of the steel truss 20 structure are embedded in the wall 30.
[0045] The wall 30 has two layers, namely a first wall 30 and a second wall 30, and the first wall and the second wall are arranged in parallel. Specifically, the upper chord 11 is embedded in the first wall, and the lower chord 12 is embedded in the second wall.
[0046] The thickness of the first wall and the second wall is 30-70 mm respectively. Preferably, the thickness of the first wall and the second wall is 50 mm.
[0047] The wall 30 is made of concrete. Specifically, concrete is cast on the steel truss 20 to form a composite plate shear wall.
[0048] An embodiment of the technical solution of the present invention provides a method for manufacturing the above-mentioned composite plate shear wall, comprising:
[0049] S1. Place the steel truss on the formwork platform, fix the side formwork around it, and pour concrete at the bottom of the steel truss to a preset height to solidify the concrete;
[0050] S2, placing an air bag inside the steel truss and inflating it, the air bag being located on the upper part of the cured concrete;
[0051] S3, pouring concrete on the airbag until the preset height, and solidifying the concrete;
[0052] S4. Deflate the airbag and remove it.
[0053] In step S1, the side formwork is the mold for pouring concrete. The height of the side formwork is higher than the thickness of the composite slab shear wall. Since the formwork is not turned over during pouring, both the upper and lower walls need to be shaped by the side formwork.
[0054] In step S2, the airbag is made of a rubber material with high hardness and a certain thickness, and a partition design is adopted. The upper and lower sides of the airbag are relatively thick and have poor ductility, and the left and right sides are relatively thin and have good ductility. Therefore, when in use, the upper and lower sides of the airbag have a good degree of support, and the left and right sides can be fixed by a single-piece truss on both sides, so that the fit between the airbags is high.
[0055] In step S3, since the airbag can wrap the steel bars on the side after being inflated, the concrete will not flow into the gap of the airbag after pouring the upper layer.
[0056] In step S4, when the strength of the concrete reaches 5 MPa, the airbag is deflated and removed. If there is a little adhesion in the airbag, the adhesion can be peeled off with a shovel.
[0057] In this embodiment, the upper concrete and the lower concrete are respectively left to solidify to form the first wall and the second wall, and the standing time is 8 to 12 hours, wherein the thickness of the first wall and the second wall is 30 to 70 mm, respectively. Preferably, the thickness of the first wall and the second wall is 50 mm.
[0058] The manufacturing method provided in the embodiment of the present invention, when manufacturing a composite plate shear wall, raises the middle part of the steel truss by an air bag and then casts the upper wall. The upper and lower walls can be cast without turning over the formwork, which improves production efficiency, is more conducive to mass production, saves energy, and ensures construction quality.
[0059] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.
[0060] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.
[0061] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.
[0062] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.
Claims
1. A steel truss structure, characterized in that: including a plurality of monolithic trusses; The single-piece truss comprises: an upper chord and a lower chord arranged in parallel and at a certain distance; a supporting steel bar, which is vertically welded to both ends of the upper chord and the lower chord to seal both ends of the upper chord and the lower chord; a web bar, which is obliquely arranged between the upper chord and the lower chord, and is welded and fixed to the upper chord and the lower chord, wherein the web bar is a continuous broken line structure, and the inclination directions of two adjacent web bars are different; Multiple single-piece trusses are arranged in parallel and fixed by welding through distribution ribs, multiple upper chord ribs and lower chord ribs are respectively perpendicular to the distribution ribs, and the distribution ribs connected to the upper chord ribs and the distribution ribs connected to the lower chord ribs can form a planar structure corresponding to each other in pairs, which is perpendicular to the upper chord ribs and the lower chord ribs.
2. The steel truss structure according to claim 1, characterized in that: The web bars are axially symmetrically distributed along the vertical lines of the upper and lower chords on the plane formed by the upper and lower chords, and are distributed in a "W" shape or a "V" shape between the upper and lower chords.
3. The steel bar truss structure according to claim 1, characterized in that: The distribution ribs are respectively located on the inner sides of the upper chord ribs and the lower chord ribs.
4. The steel truss structure according to claim 1, characterized in that: The connection point between the distribution reinforcement and the upper chord reinforcement or the lower chord reinforcement is located in the bending structure formed by the web reinforcement.
5. The steel bar truss structure according to claim 1, characterized in that: The spacing between the single-piece trusses is 600-800 mm.
6. A composite plate shear wall, characterized in that: It comprises the steel truss structure and the wall body as described in any one of claims 1 to 5, wherein the steel truss structure and the wall body together form the shear wall, the upper chord and the lower chord of the steel truss structure are embedded in the wall body, and the wall body is concrete.
7. The composite plate shear wall according to claim 6, characterized in that: The wall has two layers, namely a first wall and a second wall, and the first wall and the second wall are arranged in parallel.
8. The composite plate shear wall according to claim 7, characterized in that: The upper chord reinforcement is embedded in the first wall, and the lower chord reinforcement is embedded in the second wall.
9. The composite plate shear wall according to claim 7, characterized in that: The thickness of the first wall and the second wall are respectively 30-70 mm.
10. A method for manufacturing a composite plate shear wall according to any one of claims 6 to 9, characterized in that: include: S1. Place a steel truss on a formwork platform, fix side formworks around it, pour concrete at the bottom of the steel truss to a preset height, and solidify the concrete; S2, placing an air bag in the steel truss and inflating it, wherein the air bag is located on the upper part of the solidified concrete; S3, pouring the concrete on the airbag until a preset height, and curing the concrete; S4, deflate the airbag and extract it.