Connecting joint of steel reinforced concrete column wrapped with corrugated pipe and steel beam

Abstract

The utility model provides a connecting node of a steel reinforced concrete column and a steel beam wrapped with corrugated pipes. The connecting node comprises an upper steel reinforced concrete column, a lower steel reinforced concrete column and a prefabricated steel column, the upper and lower steel reinforced concrete columns comprise first cross-shaped steel with flanges, corrugated pipes are wrapped outside the first cross-shaped steel, and first shear-resistant studs are welded to webs of the first cross-shaped steel; the prefabricated steel column is connected between the upper steel reinforced concrete column and the lower steel reinforced concrete column and comprises a steel pipe, second cross-shaped steel, a plurality of rib plates and a steel beam, and ultra-high-performance concrete is poured on site. Notches are formed in the upper ends and the lower ends of the steel pipes and staggered with the curved flanges, and round steel pipes can be formed after splicing. The ultra-high-performance concrete is connected with reserved anchoring steel bars of the steel reinforced concrete column wrapped with the corrugated pipe, anti-shear studs on the web, anti-shear studs on the prefabricated steel column wrapped with the corrugated pipe and the steel beam section, and the cementing force, the mechanical occlusal force and the frictional resistance of rib plates. The construction efficiency is improved, steel bar binding, bolt connection and on-site welding are not needed, and construction is convenient.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, and more specifically, to a connection node between a steel-concrete column and a steel beam with an outer corrugated pipe. Background Technology

[0002] Traditional reinforced concrete columns, steel-concrete composite columns, and their connecting joints may have insufficient load-bearing capacity and bending resistance, especially when meeting the structural requirements of buildings demanding high strength and high seismic performance. Therefore, developing new structural types is crucial. Prefabricated buildings offer significant technological advantages over traditional building methods, saving labor, costs, and construction time, while also improving building quality, reducing emissions and pollution, and aligning with green development principles. Currently, traditional composite structural joints, such as bolted-welded hybrid connections, fully welded connections, and fully bolted connections, while meeting construction requirements to some extent, also have many shortcomings. Construction quality is significantly affected by the environment and construction skill levels, making stable control difficult; they are also labor-intensive and material-intensive, and have a low degree of prefabrication. With the development of new materials and technologies, some high-performance new materials (such as ultra-high performance concrete, ultra-high strength concrete, and corrugated pipes) have been introduced into the design of composite structures, improving not only the mechanical properties and corrosion resistance of the structure but also simplifying the construction process and increasing construction efficiency and quality. Therefore, studying how to design and construct efficient and reliable composite structural splicing nodes is of great significance for ensuring the safety and quality of buildings.

[0003] In view of this, the applicant hereby submits this application after studying the existing technology. Utility Model Content

[0004] This invention provides a connection node between a steel-concrete composite column and a steel beam with an external corrugated pipe. This node not only has good load-bearing performance, but also eliminates the need for rebar tying, bolt connections, and on-site welding. Furthermore, it features a simple structure, convenient construction, and improved portability, among other advantages.

[0005] This utility model provides a connection node between a steel-concrete composite column and a steel beam with an outer corrugated pipe, including an upper steel-concrete composite column, a lower steel-concrete composite column, and a precast steel column.

[0006] Both the upper and lower steel-concrete composite columns include a corrugated pipe and a first cross-shaped steel section. The first cross-shaped steel section is located inside the corrugated pipe. Each side of the first cross-shaped steel section has a curved flange that fits against the inner wall of the corrugated pipe. A first shear stud is welded to each web. Anchoring steel bars extending axially are also provided inside the corrugated pipe, and concrete is poured inside. The upper steel-concrete composite column has several grouting holes extending axially.

[0007] The precast steel column is connected between the upper and lower steel-concrete composite columns and includes a steel pipe, a second cross-shaped steel section, several ribs, and a steel beam. The steel pipe has notches at both ends, which are offset from the curved flanges and can be joined to form a circular steel pipe. The second cross-shaped steel section is welded inside the steel pipe. The several ribs are welded between the second cross-shaped steel section and the wall of the steel pipe, forming a rectangle. Each rib has a through hole. Second shear studs are welded to the wall of the steel pipe, and ultra-high performance concrete is poured inside. The steel beam is welded along the length of the ribs to the outer wall of the steel pipe and is located between the upper and lower notches.

[0008] As a further optimization, an anchoring steel bar is provided at the middle position between every two adjacent webs of the first cross-shaped steel, and the four anchoring steel bars are distributed at equal intervals.

[0009] As a further optimization, four grouting holes are reserved and located at the center of the cross-shaped section of the first cross-shaped steel.

[0010] As a further optimization, the first shear stud is arranged along the axial centerline of each web of the first cross-shaped steel.

[0011] As a further optimization, the second shear stud is welded in eight rows, and the second shear studs in each row are evenly spaced.

[0012] As a further optimization, the steel beam is an I-beam.

[0013] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0014] First, it adopts a design that is not welded on-site, bolted, or tied with steel bars. Compared with traditional splicing nodes, it is not only of higher quality than on-site welded nodes, but also less affected by the environment and construction level, and easier to control stably. Second, compared with fully bolted nodes, it saves labor and materials and has a higher degree of assembly. At the same time, compared with reinforced concrete nodes, it does not require steel bar tying, which greatly improves the portability of construction.

[0015] Secondly, corrugated pipes are used as the outer cladding material. As a novel structural form, corrugated pipes offer excellent mechanical properties and ease of construction. The presence of corrugated pipes not only increases the stiffness of the steel-concrete composite column but also restrains the concrete, enabling it to withstand greater loads. Furthermore, corrugated pipes prevent corrosion of the internal steel structure and reinforcing bars, improving structural durability. They also reduce the need for fire-retardant and anti-corrosion coatings, lowering costs. In addition, the corrugated structure absorbs and disperses seismic energy, thereby improving the column's seismic performance. Finally, corrugated pipes also provide a certain anchoring force and protect the anchoring reinforcing bars.

[0016] Third, the precast columns have anchoring steel bars, which further improves the mechanical properties of the joint and the overall integrity of the joint. At the same time, the anchoring steel bars are not exposed and are protected by the corrugated pipe, which improves the performance of the component and the ease of construction.

[0017] Fourth, the ribbed plate not only meets the load transfer requirements of the beam, but the holes in the middle also allow cast-in-place ultra-high performance concrete to pass through, serving as grouting holes and anchoring the concrete. Simultaneously, the ribbed plate can reduce the buckling of the precast steel columns in the steel beam segment when the steel beam is under load, thereby improving its load-bearing capacity.

[0018] Fifth, corrugated pipes and steel pipes with upper and lower notches can be used as concrete pouring templates. In both prefabrication and on-site construction, the structure can basically achieve formwork-free operation, saving on formwork usage.

[0019] Sixth, ultra-high performance concrete is used at the connection joints, which can improve the strength of the connection joints.

[0020] This structure ensures load transfer between the corrugated steel-concrete composite column and the steel beam, exhibiting excellent load-bearing performance and enhancing the overall structural integrity. Furthermore, the splicing joint is simple in construction and convenient to install, easily connecting the corrugated steel-concrete composite column and the steel beam. This invention improves the applicability of the connection between corrugated steel-concrete composite columns and steel beams in prefabricated buildings, and has broad application prospects in precast assembled construction. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is the elevation view of the upper steel-concrete composite column;

[0023] Figure 2 This is a top view of the upper steel-concrete composite column;

[0024] Figure 3 This is the elevation view of the lower steel-concrete composite column;

[0025] Figure 4 This is a top view of the lower steel-concrete composite column;

[0026] Figure 5 Elevation view of a precast steel column (without high-performance concrete pouring);

[0027] Figure 6 This is a structural elevation view of a connection node between a steel-concrete composite column and a steel beam with an external corrugated pipe.

[0028] Figure 7 This is an elevation view of the dismantled section after the casting of a steel-concrete composite column and steel beam connection node with an external corrugated pipe.

[0029] Figure 8 Elevation view of the cast-in-place structure of a steel-concrete composite column and steel beam connection node with an external corrugated pipe.

[0030] Markings in the diagram: 1-Upper steel-concrete column; 11-Grouting hole; 2-Lower steel-concrete column; 3-Precast steel column; 31-Steel pipe; 32-Second cross-shaped steel; 33-Rib plate; 34 Steel beam; 35-Notch; 36-Second shear stud; 37-Ultra-high performance concrete; 38-Through hole; 4-Corrugated pipe; 5-First cross-shaped steel; 51-Curved flange; 6-First shear stud; 7-Anchoring reinforcement; 8-Concrete. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] Example

[0033] Depend on Figures 1 to 8 As shown, this utility model embodiment provides a connection node between a steel-concrete composite column and a steel beam with an outer corrugated pipe, including an upper steel-concrete composite column 1, a lower steel-concrete composite column 2, and a precast steel column 3.

[0034] Both the upper steel-concrete column 1 and the lower steel-concrete column 2 include a corrugated pipe 4 and a first cross-shaped steel 5. The first cross-shaped steel 5 is disposed inside the corrugated pipe 4. The first cross-shaped steel 5 has curved flanges 51 welded to each side of the cross-shaped section, which are attached to the inner wall of the corrugated pipe 4. A first shear stud 6 is welded to each web. The corrugated pipe 4 is also provided with axially extending anchoring steel bars 7 and is filled with concrete 8. The upper steel-concrete column 1 is reserved with a number of axially extending grouting holes 11. Four grouting holes 11 are reserved and located at the center of the cross-shaped section of the first cross-shaped steel 5. One grouting hole is provided between every two adjacent webs of the first cross-shaped steel 5.

[0035] The precast steel column 3 is connected between the upper steel-concrete column 1 and the lower steel-concrete column 2, and includes a steel pipe 31, a second cross-shaped steel 32, several ribs 33, and a steel beam 34. The steel pipe 31 has notches 35 at both ends, which are offset from the curved flange 51 and can be spliced ​​to form a circular steel pipe. The second cross-shaped steel 32 is welded inside the steel pipe 31. The several ribs 33 are respectively welded between the web of the second cross-shaped steel 32 and the wall of the steel pipe 31, forming a rectangle. Each rib 33 has a through hole 38, allowing cast-in-place ultra-high performance concrete to pass through. A second shear stud 36 is welded to the wall of the steel pipe 31, and ultra-high performance concrete 37 is poured inside the pipe. The steel beam 34 is welded along the length of the ribs 33 to the outer wall of the steel pipe 31 and is located between the upper and lower notches 35. Among them, steel beam 34 is an I-beam, and its width is the same as the width of the rectangle enclosed by rib plate 33.

[0036] In this application, the upper and lower steel-concrete composite columns at the connection node have pre-reserved un-concrete portions and embedded anchoring steel bars. Grouting holes are also pre-reserved during the prefabrication of the upper steel-concrete composite column. The splicing node between the corrugated steel-concrete composite column and the prefabricated steel column with steel beam segment is connected through ultra-high performance concrete, the pre-reserved anchoring steel bars of the corrugated steel-concrete composite column, shear studs on the web, shear studs on the corrugated pipe and the prefabricated steel column with steel beam segment, the bonding force of the ribs, mechanical interlocking force, and frictional resistance. This connection improves construction efficiency, eliminates the need for steel bar tying, bolt connections, and on-site welding. Furthermore, ribs are installed at the node of the prefabricated steel column with steel beam segment to prevent local buckling of the steel plate at the node and enhance the stability and seismic resistance of the node. Moreover, this structure is simple in construction, convenient for construction and transportation, and improves portability, thereby reducing labor and transportation costs. It also exhibits good mechanical and construction performance.

[0037] The construction method of the connection node between the steel-concrete composite column and the steel beam with the corrugated pipe of this application includes the following two stages:

[0038] 1. Precasting of upper and lower steel-concrete composite columns:

[0039] First, based on the column section design calculation requirements, select appropriate steel plate dimensions, process them into rectangles at suitable intervals, and weld them into cross-shaped steel sections. Select curved steel plates of appropriate width as curved flanges 51, and weld them to each side of the cross-shaped section of the first cross-shaped steel section 5. Appropriate steel plate dimensions and widths refer to steel plate dimensions that meet the requirements of section steel content (i.e., economy) and stress, and also meet relevant specification requirements.

[0040] Next, a row of first shear studs 6 are welded at appropriate intervals on each web of the first cross-shaped steel 5, preferably the first shear studs 6 are welded on the axial center line of the web.

[0041] Next, corrugated pipe 4 is wrapped around the outside of the first cross-shaped steel 5; then, formwork is erected at the lower end and anchoring steel bars 7 are fixed. An anchoring steel bar 7 is set between every two adjacent webs of the first cross-shaped steel 5, and the four anchoring steel bars 7 are distributed at intervals. After the anchoring steel bars 7 are fixed, concrete 8 is poured.

[0042] It is worth noting that during prefabrication, the upper steel-concrete column 1 and the lower steel-concrete column 2 have the same shape. Grouting holes 11 need to be pre-reserved during the prefabrication of the upper steel-concrete column 1. One grouting hole 11 is reserved between every two adjacent webs of the first cross-shaped steel 5, and the four grouting holes 11 are located at the center of the cross section. For example... Figure 1 and Figure 2 .

[0043] Precast steel column 3:

[0044] According to the column section design calculation requirements, a steel pipe 31 of appropriate size is selected. The upper and lower ends of the steel pipe 31 are cut with the width of the curved flange 51 to form notches 35. Then, a second cross-shaped steel 32 is welded inside. Subsequently, ribs 33 with through holes 38 are welded between the webs of the second cross-shaped steel 32 and the inner wall of the steel pipe 3. The ribs 33 are rectangular steel plates of appropriate size with holes of appropriate size punched in the middle, and multiple ribs 33 form a rectangle. Next, second shear studs 36 are welded to the inner wall of the steel pipe 3. Preferably, eight rows of second shear studs 36 are welded, each row arranged at equal intervals. Finally, a prefabricated I-shaped steel beam 34 is welded to the outer wall of the steel pipe 3 between the upper and lower notches, and the steel beam 34 extends along the length of the ribs 33, with the width of the steel beam 34 being the same as the width of the rectangle formed by the ribs 33. Figure 3 .

[0045] 2. On-site construction phase:

[0046] This stage involves the assembly of prefabricated joints after the upper and lower steel-concrete columns and precast steel columns have been prefabricated and transported to the site. First, the lower steel-concrete column 2, precast steel column 3, and upper steel-concrete column 1 are installed sequentially and externally secured with tools. Next, ultra-high performance concrete 37 is poured into the steel pipe 31 through the grouting hole 11. Once the ultra-high performance concrete 37 reaches the design strength, curing is complete, and the on-site construction stage is finished. Figure 4 and Figure 5 .

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A connection node between a steel-concrete composite column and a steel beam with an outer corrugated pipe, characterized in that, This includes upper steel-concrete composite columns, lower steel-concrete composite columns, and precast steel columns; Both the upper and lower steel-concrete composite columns include a corrugated pipe and a first cross-shaped steel section. The first cross-shaped steel section is located inside the corrugated pipe. Each side of the first cross-shaped steel section has a curved flange that fits against the inner wall of the corrugated pipe. A first shear stud is welded to each web. Anchoring steel bars extending axially are also provided inside the corrugated pipe, and concrete is poured inside. The upper steel-concrete composite column has several grouting holes extending axially. The precast steel column is connected between the upper and lower steel-concrete composite columns and includes a steel pipe, a second cross-shaped steel section, several ribs, and a steel beam. The steel pipe has notches at both ends, which are offset from the curved flanges and can be joined to form a circular steel pipe. The second cross-shaped steel section is welded inside the steel pipe. The several ribs are welded between the second cross-shaped steel section and the wall of the steel pipe, forming a rectangle. Each rib has a through hole. Second shear studs are welded to the wall of the steel pipe, and ultra-high performance concrete is poured inside. The steel beam is welded along the length of the ribs to the outer wall of the steel pipe and is located between the upper and lower notches.

2. The connection node between a steel-concrete composite column and a steel beam with an external corrugated pipe as described in claim 1, characterized in that... An anchoring steel bar is provided at the midpoint between every two adjacent webs of the first cross-shaped steel, and the four anchoring steel bars are distributed at equal intervals.

3. The connection node between a steel-concrete composite column and a steel beam with an external corrugated pipe as described in claim 1, characterized in that... Four grouting holes are reserved and located at the center of the cross-shaped section of the first cross-shaped steel.

4. The connection node between a steel-concrete composite column and a steel beam with an external corrugated pipe as described in claim 1, characterized in that... The first shear studs are arranged along the axial centerline of each web of the first cross-shaped steel.

5. The connection node between a steel-concrete composite column and a steel beam with an external corrugated pipe as described in claim 1, characterized in that... The second shear stud is welded in eight rows, and the second shear studs in each row are evenly spaced.

6. The connection node between a steel-concrete composite column and a steel beam with an external corrugated pipe as described in claim 1, characterized in that... The steel beam is an I-beam.

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