Fabricated butterfly-shaped multi-cavity concrete filled steel tube composite structure
By adopting a prefabricated butterfly-shaped multi-cavity steel pipe concrete superimposed structure in large public buildings, the problem of limited application of steel pipe concrete superimposed structure in the prior art in large public buildings is solved, and higher lateral stiffness and torsion resistance are achieved, and the construction process is simplified.
Patent Information
- Application Number
- CN202421535120.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-01
AI Technical Summary
The existing steel pipe concrete overlapping structure is limited in large public buildings, mainly because the overlapping columns with built-in single steel pipes are difficult to effectively connect multi-limbed steel support or steel beams, and local stress concentration is prone to occur, resulting in unreliable performance of the connecting nodes.
The prefabricated butterfly multi-cavity steel pipe concrete overlapping structure is adopted. Through the butterfly multi-cavity steel pipe stacking structure, the butterfly multi-cavity steel pipe is built-in butterfly multi-cavity steel pipe, and the outer periphery is covered with reinforced concrete. The multi-cavity design of the butterfly steel pipe structure and the restraining effect of the peripheral reinforced concrete are used to achieve better lateral stiffness and torsion resistance.
It realizes better constraints on core concrete under fixed cross-sectional size, improves the structure's lateral stiffness, torsional and seismic properties, meets the node connection requirements of tree-like structures in large public buildings, and simplifies the construction process.
Smart Images
Figure CN222835114U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of building engineering structures, in particular to an assembled butterfly-shaped multi-cavity steel tube concrete superimposed structure. Background Art
[0002] The steel tube concrete composite structure is a composite structure with steel tube concrete as the core, steel bars tied around the steel tube and poured concrete. Its structural form can give full play to the performance of the outer reinforced concrete and the core steel tube concrete, and achieve a synergistic and complementary effect, so that the structure as a whole has good seismic performance. Due to the existence of the core steel tube concrete, the steel tube concrete composite structure has the advantages of high bearing capacity, good ductility and convenient construction. The existence of the outer reinforced concrete makes the steel tube in the composite structure less prone to local buckling, so it can give full play to the material properties when loaded, and maintain a strong constraint on the core concrete. In addition, the outer reinforced concrete makes the steel tube concrete composite structure have good fire resistance. When used in offshore or marine engineering, the outer reinforced concrete can also effectively prevent the corrosion of the steel tube, making the structure have higher durability.
[0003] In view of the above advantages, steel tube concrete composite structures have been used in some high-rise buildings and long-span bridges in my country. However, the application of this superior performance composite structure in large public buildings such as airports, stadiums, and high-speed rail stations is still very limited. The main reason is that these large public buildings need to minimize the number of load-bearing columns to achieve greater traffic and evacuation capacity. This requires that a load-bearing column often needs to be effectively connected to the multi-limb upper support structure to form a tree-like structure to meet the needs of large spaces. At present, the composite column with a single steel tube inside not only has great challenges in the connection structure with multi-limb steel supports or steel beams, but also easily produces local stress concentration in the core concrete, resulting in the risk of unreliable and unsafe performance of the connection node. Utility Model Content
[0004] In view of this, the purpose of the utility model is to propose an assembled butterfly-shaped multi-cavity steel tube concrete composite structure. The composite structure with a built-in butterfly-shaped multi-cavity steel tube concrete can meet the node connection requirements of tree structures in large public buildings such as airports, stadiums, and high-speed rail stations, and has the advantages of greater rigidity, better constraint on the core concrete when the cross-sectional size is fixed, and convenient assembly construction.
[0005] In order to achieve the above technical objectives, the technical solution adopted by the utility model is:
[0006] An assembled butterfly-shaped multi-cavity steel tube concrete composite structure comprises: butterfly-shaped multi-cavity steel tube concrete and peripheral reinforced concrete, wherein the peripheral reinforced concrete is coated on the periphery of the butterfly-shaped multi-cavity steel tube concrete.
[0007] Furthermore, the butterfly-shaped multi-cavity steel tube concrete comprises a butterfly-shaped steel tube structure consisting of multiple cavities and core concrete, and the core concrete is filled inside each cavity of the butterfly-shaped steel tube structure.
[0008] Furthermore, the butterfly-shaped steel pipe structure includes a quadrilateral steel pipe and four semi-elliptical steel pipes, and the side planes of the four semi-elliptical steel pipes are fixedly connected to the four side surfaces of the quadrilateral steel pipe to form a butterfly shape; cavities are provided in the quadrilateral steel pipe and the semi-elliptical steel pipe, and the core concrete is filled in each cavity.
[0009] Furthermore, multiple rows of connection holes are provided on the side planes of the four semi-elliptical steel pipes and the corresponding positions of the four side surfaces of the quadrilateral steel pipe, and are connected by bolts and the connection holes.
[0010] Furthermore, a plurality of rows of connection holes are transversely penetrated in a side plane of the semi-elliptical steel pipe and a corresponding side surface of the quadrilateral steel pipe, and the connection holes in each row are equidistantly distributed.
[0011] Furthermore, the outer reinforced concrete includes a steel mesh and outer concrete, the steel mesh is tied to the outer periphery of the butterfly-shaped steel pipe structure, and the outer concrete is poured on the outer periphery of the butterfly-shaped steel pipe structure.
[0012] Furthermore, the steel mesh includes a plurality of stirrups and a plurality of groups of reinforcing longitudinal bars arranged horizontally from top to bottom, the plurality of stirrups are equidistantly spaced and sleeved on the periphery of the butterfly-shaped steel pipe structure, and the plurality of groups of reinforcing longitudinal bars are arranged on the inner side of the stirrups; a rectangular outer concrete formwork is installed on the periphery of the stirrups, and outer concrete is poured in the outer concrete formwork.
[0013] Furthermore, the stirrups are of a rectangular structure, and the four corners of each stirrup are respectively provided with corner reinforcements composed of oblique structural reinforcements and reinforced longitudinal reinforcements, and the middle of each side of each stirrup is provided with a middle reinforcement composed of bent structural reinforcements and reinforced longitudinal reinforcements.
[0014] Furthermore, a right triangle is formed between the oblique structural reinforcement of the corner reinforcement and the corner of the stirrup, an isosceles triangle is formed between the bent structural reinforcement of the middle reinforcement and the middle of a side of the stirrup, and a group of reinforcing longitudinal reinforcements is provided in the right triangle and the isosceles triangle, each group of reinforcing longitudinal reinforcements has three reinforcing longitudinal reinforcements, and each of the reinforcing longitudinal reinforcements is respectively clamped at each corner of the right triangle and the isosceles triangle.
[0015] Furthermore, the vertex angle of the isosceles triangle is directly opposite to the junction between two adjacent semi-elliptical steel pipes.
[0016] By adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:
[0017] 1. Butterfly-shaped multi-cavity steel tube concrete includes a butterfly-shaped steel tube structure and core concrete. The butterfly-shaped steel tube structure has multiple cavities, which can be easily welded with the upper multi-limb steel support or steel beam to form a tree-like structure. It can not only meet the large space requirements of large public buildings such as airports, stadiums, and high-speed railway stations, but also has architectural art advantages such as beautiful shape.
[0018] 2. The butterfly-shaped multi-cavity steel tube concrete composite structure makes full use of the characteristic that the butterfly-shaped steel tube structure is arranged far away from the neutral axis of the cross section. Therefore, it has high lateral stiffness, torsional resistance and seismic resistance.
[0019] 3. The butterfly-shaped steel tube structure makes full use of the advantages of multiple steel tubes' good restraining effect on the core concrete, so it has a strong bearing capacity under a fixed cross-sectional size.
[0020] 4. Each cavity of the butterfly-shaped steel pipe structure is processed in the factory and then transported to the construction site. The cavities are assembled by bolts, making the construction convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 It is a stereoscopic diagram of an assembled butterfly-shaped multi-cavity steel tube concrete composite structure provided by the utility model.
[0023] Figure 2 yes Figure 1 A three-dimensional view of the middle and outer perimeter when the concrete is half poured.
[0024] Figure 3 yes Figure 2 The perspective view of the core concrete is not shown.
[0025] Figure 4 yes Figure 1 Schematic diagram of the cross section along the AA direction.
[0026] Description of the numbers in the figure:
[0027] 1-butterfly-shaped multi-cavity steel tube concrete, 11-butterfly-shaped steel tube structure, 111-quadrilateral steel tube, 112-semi-elliptical steel tube, 113-cavity, 114-connecting hole, 115-bolt, 12-core concrete, 2-peripheral reinforced concrete, 21-steel mesh, 211-hoops, 212-reinforced longitudinal bars, 213-oblique structural bars, 214-bent structural bars, 22-peripheral concrete. DETAILED DESCRIPTION
[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is particularly noted that the following embodiments are only used to illustrate the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only partial embodiments of the present invention rather than all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] See also Figure 1-Figure 4 The utility model is an assembled butterfly-shaped multi-cavity steel tube concrete composite structure, comprising: butterfly-shaped multi-cavity steel tube concrete 1 and peripheral reinforced concrete 2, wherein the peripheral reinforced concrete 2 is coated on the periphery of the butterfly-shaped multi-cavity steel tube concrete 1. The utility model has a built-in butterfly-shaped multi-cavity steel tube concrete 1 composite structure, which can meet the node connection requirements of the tree structure in large public buildings such as airports, stadiums, and high-speed railway stations, and has the advantages of greater rigidity, better constraint on the core concrete 12 when the cross-sectional size is fixed, and convenient assembly construction.
[0030] In this embodiment, the butterfly-shaped multi-cavity steel tube concrete 1 includes a butterfly-shaped steel tube structure 11 composed of a plurality of cavities 113 and a core concrete 12, wherein the core concrete 12 is filled inside each cavity 113 of the butterfly-shaped steel tube structure 11. The butterfly-shaped steel tube structure 11 has a steel tube arrangement far away from the neutral axis of the cross section, and the area of the steel tube in the neutral axis region of the cross section is small. The steel tube in this region plays the role of connecting the butterfly-shaped steel tubes on the upper and lower sides of the neutral axis of the cross section. The butterfly-shaped steel tubes on the upper and lower sides of the neutral axis of the cross section are far away from the neutral axis and have a large area; thus, the butterfly-shaped steel tubes have high rigidity and excellent torsional resistance, and can effectively resist the lateral forces faced by high-rise buildings, such as earthquake forces and wind forces, thereby significantly improving the seismic resistance and overall stability of the building.
[0031] In this embodiment, the butterfly-shaped steel pipe structure 11 includes a quadrilateral steel pipe 111 and four semi-elliptical steel pipes 112. The side planes of the four semi-elliptical steel pipes 112 are fixedly connected to the four side surfaces of the quadrilateral steel pipe 111 to form a butterfly shape. The butterfly-shaped steel pipe structure 11 divides the steel pipe with a huge cross-sectional size into a plurality of grids, which is conducive to further exerting the hoop effect of the steel pipe on the core concrete 12, thereby improving the strength and plasticity of the core concrete 12, and making the structure with the same cross-sectional size have more superior performance; the quadrilateral steel pipe 111 and A cavity 113 is provided in the semi-elliptical steel tube 112, and the core concrete 12 is filled in each cavity 113. The butterfly-shaped cross section has multiple cavities 113, which can be conveniently welded with the upper multi-limb steel structure support or steel beam to form a tree-like structure. At the same time, the upper multi-limb steel structure can flexibly select 1 to 4 limbs. The connection node transmits the internal force of the upper multi-limb steel structure to the butterfly-shaped multi-cavity steel tube, and then to the core concrete 12, thereby avoiding the stress concentration phenomenon caused by the direct load of the core concrete 12, and also making the node force transmission path have the advantages of clear and reliable. The tree-like structure can not only significantly reduce the actual span of the structure, but also hardly occupy the use space of the building. As a typical bionic structure, the tree-like structure has a beautiful shape and can enhance the artistic effect of the building. Therefore, the butterfly-shaped multi-cavity steel tube concrete composite structure is very suitable for large public buildings with large spans or large spaces such as airports, stadiums, and high-speed rail stations. Each cavity 113 of the butterfly-shaped steel pipe structure 11 is processed in a factory. After being transported to the construction site, the cavities 113 are assembled by bolts 115 , which simplifies the on-site construction process and greatly shortens the construction time.
[0032] In this embodiment, the side planes of the four semi-elliptical steel pipes 112 and the corresponding positions of the four side surfaces of the quadrilateral steel pipe 111 are provided with multiple rows of connection holes 114, and are connected by bolts 115 and the connection holes 114. The bolts 115 are connected by passing through the corresponding connection holes 114, ensuring that the bolts 115 are installed and tightened, and each connection part is in close contact, so that each steel pipe is assembled to form a butterfly-shaped steel pipe structure 11.
[0033] In this embodiment, a side plane of the semi-elliptical steel tube 112 and a corresponding side surface of the quadrilateral steel tube 111 are transversely penetrated with multiple rows of connection holes 114, and each row of the connection holes 114 is equidistantly distributed. Multiple rows of connection holes 114 are equidistantly distributed and fixed by bolts 115, so that each connection part can be more tightly connected and not easy to loosen.
[0034] In this embodiment, the outer reinforced concrete 2 includes a steel mesh 21 and outer concrete 22. The steel mesh 21 is tied to the outer periphery of the butterfly-shaped steel pipe structure 11, and the outer concrete 22 is poured on the outer periphery of the butterfly-shaped steel pipe structure 11. The tied steel mesh 21 can restrain the outer concrete 22.
[0035] In this embodiment, the steel mesh 21 includes a plurality of stirrups 211 and a plurality of groups of reinforcing longitudinal bars 212 arranged horizontally from top to bottom. The plurality of stirrups 211 are equidistantly spaced and sleeved on the periphery of the butterfly-shaped steel pipe structure 11, and the plurality of groups of reinforcing longitudinal bars 212 are arranged on the inner side of the stirrups 211. A rectangular outer concrete formwork (not shown) is installed on the periphery of the stirrups 211, and outer concrete 22 is poured in the outer concrete formwork. The outer concrete 22 is poured on the periphery of the plurality of groups of steel bars 212 and the inner circle and outer area of the stirrups 211.
[0036] In this embodiment, the stirrups 211 are rectangular in structure, and the four corners of each stirrup 211 are respectively provided with corner reinforcements consisting of oblique structural bars 213 and reinforced longitudinal bars 212, and the middle part of each side of each stirrup 211 is provided with a middle reinforcement consisting of bent structural bars 214 and reinforced longitudinal bars 212; the corner reinforcements and middle reinforcements are added to improve the strength of different parts of the stirrups 211 to strengthen the constraint on the outer concrete 22. Most areas of the outer concrete 22 are subject to strong constraints, which improves the axial compressive bearing capacity of the outer concrete 22 and matches the strength of the inner and outer concretes.
[0037] In this embodiment, a right triangle structure is formed between the oblique structural reinforcement 213 of the corner reinforcement and the corner of the stirrup 211 (two mutually perpendicular sides form a right angle, and the corner refers to a part of the two sides close to the right angle), and an isosceles triangle structure is formed between the bent structural reinforcement 214 of the middle reinforcement and the middle of a side of the stirrup 211; the corner reinforcement and the middle reinforcement can also adopt other shapes that can be used for reinforcement; a group of reinforcing longitudinal reinforcements is provided in the right triangle and the isosceles triangle, and each group of reinforcing longitudinal reinforcements 212 has three steel bars 212, and each of the reinforcing longitudinal reinforcements 212 is respectively clamped at each corner of the right triangle and the isosceles triangle, so as to be tied together with the stirrups 211 to form a steel mesh 21 to strengthen the constraint on the outer concrete 22.
[0038] In this embodiment, the vertex of the isosceles triangle is aligned with the boundary between two adjacent semi-elliptical steel pipes 112 , so that the stirrups 211 can constrain the surrounding concrete 22 .
[0039] The implementation steps of the utility model are as follows:
[0040] First, the quadrilateral steel pipe 111 and the semi-elliptical steel pipe 112 are processed in the factory according to the size requirements, and multiple rows of connecting holes 114 are opened along the height direction on the pipe wall on the side where each cavity 113 contacts, and the quadrilateral steel pipe 111 and the semi-elliptical steel pipe 112 are transported to the construction site;
[0041] Then, after the quadrilateral steel pipe 111 and the semi-elliptical steel pipe 112 are arranged at the designated positions, the contact surfaces of the semi-elliptical steel pipe 112 and the quadrilateral steel pipe 111 are connected by bolts 115 passing through corresponding connection holes 114, ensuring that the bolts 115 are installed and tightened, and each connection part is in close contact, so that each steel pipe is assembled to form a butterfly-shaped steel pipe structure 11;
[0042] Next, core concrete 12 is poured into the cavity 113 of the quadrilateral steel tube 111 and the semi-elliptical steel tube 112 to form a butterfly-shaped multi-cavity steel tube concrete 1. After the core concrete 12 is cured, longitudinal steel bars 212 and stirrups 211 are tied or welded to the periphery of the semi-elliptical steel tube 112 as required to form a steel mesh 21.
[0043] Finally, a peripheral concrete formwork (not shown) is made and installed at a suitable position outside the steel mesh 21. After the peripheral concrete 22 is poured in the peripheral concrete formwork, the peripheral concrete formwork is removed to finally form the assembled butterfly-shaped multi-cavity steel tube concrete composite structure of the utility model.
[0044] The above descriptions are only some embodiments of the present invention, and do not limit the protection scope of the present invention. Any equivalent device or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. An assembled butterfly-shaped multi-cavity steel tube concrete composite structure, characterized in that: include: Butterfly-shaped multi-cavity steel tube concrete and peripheral reinforced concrete, wherein the peripheral reinforced concrete is coated on the periphery of the butterfly-shaped multi-cavity steel tube concrete; the butterfly-shaped multi-cavity steel tube concrete comprises a butterfly-shaped steel tube structure composed of multiple cavities and core concrete, wherein the core concrete is filled in each cavity of the butterfly-shaped steel tube structure; the butterfly-shaped steel tube structure comprises a quadrilateral steel tube and four semi-elliptical steel tubes, wherein the side planes of the four semi-elliptical steel tubes are fixedly connected to the four side surfaces of the quadrilateral steel tube to form a butterfly shape; cavities are arranged in the quadrilateral steel tube and the semi-elliptical steel tube, and the core concrete is filled in each cavity.
2. The assembled butterfly-shaped multi-cavity steel tube concrete composite structure according to claim 1, characterized in that: Multiple rows of connection holes are provided on the side planes of the four semi-elliptical steel pipes and the corresponding positions of the four side surfaces of the quadrilateral steel pipe, and are connected by bolts and the connection holes.
3. The assembled butterfly-shaped multi-cavity steel tube concrete composite structure according to claim 2, characterized in that: A side plane of the semi-elliptical steel pipe and a corresponding side surface of the quadrilateral steel pipe are transversely penetrated with a plurality of rows of connecting holes, and the connecting holes in each row are distributed at equal distances.
4. The assembled butterfly-shaped multi-cavity steel tube concrete composite structure according to claim 1, characterized in that: The outer reinforced concrete comprises a steel mesh and outer concrete. The steel mesh is tied to the outer periphery of the butterfly-shaped steel pipe structure, and the outer concrete is poured on the outer periphery of the butterfly-shaped steel pipe structure.
5. The assembled butterfly-shaped multi-cavity steel tube concrete composite structure according to claim 4, characterized in that: The steel mesh includes a plurality of stirrups and a plurality of groups of reinforcing longitudinal bars arranged horizontally from top to bottom. The plurality of stirrups are arranged at equal intervals on the periphery of the butterfly-shaped steel pipe structure, and the plurality of groups of reinforcing longitudinal bars are arranged on the inner side of the stirrups. A rectangular outer concrete formwork is installed on the periphery of the stirrups, and outer concrete is poured in the outer concrete formwork.
6. The assembled butterfly-shaped multi-cavity steel tube concrete composite structure according to claim 5, characterized in that: The stirrups are of rectangular structure, and the four corners of each stirrup are respectively provided with corner reinforcements consisting of oblique structural reinforcements and reinforced longitudinal reinforcements, and the middle of each side of each stirrup is provided with a middle reinforcement consisting of bent structural reinforcements and reinforced longitudinal reinforcements.
7. The assembled butterfly-shaped multi-cavity steel tube concrete composite structure according to claim 6, characterized in that: A right triangle is formed between the oblique structural reinforcement of the corner reinforcement and the corner of the stirrup, an isosceles triangle is formed between the bent structural reinforcement of the middle reinforcement and the middle of a side of the stirrup, and a group of reinforcing longitudinal reinforcements is provided in the right triangle and the isosceles triangle, each group of reinforcing longitudinal reinforcements has three reinforcing longitudinal reinforcements, and each of the reinforcing longitudinal reinforcements is respectively clamped at each corner of the right triangle and the isosceles triangle.
8. The assembled butterfly-shaped multi-cavity steel tube concrete composite structure according to claim 7, characterized in that: The vertex angle of the isosceles triangle is directly opposite to the junction between two adjacent semi-elliptical steel pipes.