Novel node structure of column stirrup and steel reinforced concrete column

Abstract

The utility model discloses a novel node structure of a column stirrup and a steel reinforced concrete column. The novel node structure solves the problem that in an existing constructional column, dense drilling needs to be carried out on a structural steel wing plate, so that the pressure bearing capacity of structural steel is reduced. The structure comprises profile steel, reinforcing steel bar hoops, rib plates, tie bars and concrete, the rib plates are welded and fixed in a right-angle area between two adjacent web plates, the rib plates are horizontally arranged, at least one tie bar is welded and fixed on each rib plate, the tie bars are connected with the reinforcing steel bar hoops in a binding mode, the reinforcing steel bar hoops surround the periphery of the profile steel, and the concrete is arranged between the reinforcing steel bar hoops and the rib plates. The section steel, the steel bar hoops, the rib plates and the tie bars are wrapped in the concrete. The technical improvement is implemented on the basis of the existing technical specifications, trepanning operation on the profile steel web is avoided, the construction process does not need to be modified, and the method has extremely high popularization value.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a construction technology for structural columns in steel-concrete structures. Background Technology

[0002] A steel-concrete composite column is a type of structural column in which steel sections, reinforcing hoops, and steel-encased concrete work together to bear vertical loads.

[0003] In the existing design and construction of steel-concrete composite columns, reinforcing hoops enclose the steel profile and exert a significant lateral restraint on the concrete they enclose; therefore, the presence of reinforcing hoops is necessary. Furthermore, because the reinforcing hoops enclose the steel profile and maintain a certain gap with it, they are typically fixed to the steel profile using tie rods before concrete pouring.

[0004] Therefore, regarding the connection between the reinforcing hoops and the steel section, the "Construction of Steel-Concrete Composite Structures" provides a solution: A horizontal hole is made in the web of the steel section 01. This horizontal hole is used to install the tie rod 02. The two ends of the tie rod are then tied to the reinforcing hoop 03. This creates an effective connection between the steel section 01, the tie rod 02, and the reinforcing hoop. Finally, formwork 04 is erected and concrete is poured to form the structural column. The horizontal section of this structural column can be referenced. Figure 1 .Should Figure 2 The diameter of the horizontal perforation 05 shown is 4 to 5 millimeters larger than the diameter of the tie bar (rebar). (Reference) Figure 2 This facilitates the installation of tie rods, and initial fixation is achieved by spot welding between the tie rods and the steel profile.

[0005] The drawback of this approach is:

[0006] Drilling is a labor-intensive process, especially since the web of steel section 01 is generally thick, for example, 20 mm thick. A single horizontal hole can take several minutes to drill, and hundreds of horizontal holes 05 need to be machined on a single structural column. The drilling operation has a long processing cycle and high processing costs.

[0007] The dense presence of horizontal perforations in the steel profiles damages the steel columns and negatively impacts their stiffness. This is especially true in structural columns subjected to vertical pressure, where the presence of such dense horizontal perforations is detrimental to the load-bearing capacity of the structural columns. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a novel joint structure for column stirrups and steel-concrete composite columns. This solves the problem of reduced load-bearing capacity of steel sections due to the need for dense drilling of steel flanges in existing structural columns. It is a structure that does not damage the original load-bearing performance of the steel sections, avoids drilling, and further solves the problems of high drilling costs and long cycles.

[0009] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0010] A novel joint structure for column stirrups and steel-concrete composite columns includes steel sections, reinforcing hoops, ribs, tie bars, and concrete. The steel section consists of a web, flanges, and shear studs. The web comprises two perpendicular steel plates welded together to form a cross shape. The flanges are vertically welded to the outer edge of the web, and shear studs are welded to the outer surface of the flanges. The key feature is that ribs are welded and fixed within the right-angle region between adjacent web sections. These ribs are horizontally positioned, and at least one tie bar is welded and fixed to each rib. The tie bar is tied to the reinforcing hoop, which surrounds the steel section. The steel section, reinforcing hoop, ribs, and tie bars are encased in concrete. This novel joint structure for column stirrups and steel-concrete composite columns exhibits the appearance characteristics of concrete.

[0011] Furthermore, the ribs are spaced one meter apart from top to bottom.

[0012] Furthermore, the steel reinforcement hoop is a rectangular steel hoop formed by bending threaded steel bars. The steel reinforcement hoop is placed around the steel section and is equidistant from the steel section. The steel reinforcement hoop is tied to the vertically arranged straight bars.

[0013] Furthermore, the rib is an L-shaped steel plate, and the two ends of the rib are welded and fixed to the web.

[0014] Furthermore, the thickness of the steel plate of the rib is less than or equal to the thickness of the steel plate of the web.

[0015] Furthermore, there are weld points between the rib and the adjacent wing plate.

[0016] Furthermore, the ribs are arranged perpendicularly to the web and wing plates, respectively.

[0017] Furthermore, the tie bar is a U-shaped bent steel bar, and a hook is provided at the end of the tie bar, which is tied to the steel bar hoop.

[0018] The beneficial effects of this utility model are:

[0019] The structural features and technical advantages of this utility model will be further explained below with reference to specific embodiments and the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a horizontal sectional view of the original structural column.

[0021] Figure 2 This is a cross-sectional view of the steel profile before the improvement.

[0022] Figure 3This shows the overall effect after the steel cage is tied.

[0023] Figure 4 This refers to the welding effect of the ribs.

[0024] Figure 5 for Figure 4 The corresponding elevation view.

[0025] Figure 6 This is a horizontal sectional view of the structural column of this utility model.

[0026] In the picture:

[0027] 01. Structural steel, 02. Tie bars, 03. Rebar hoops, 04. Formwork, 05. Horizontal perforations.

[0028] 10. Steel plate, 11. Web plate, 12. Flange plate, 13. Shear studs.

[0029] 20 steel reinforcement hoop,

[0030] 30 ribs,

[0031] 40 stretches,

[0032] 50 concrete. Detailed Implementation

[0033] This embodiment will be described in conjunction with the appendix to the instruction manual. Figure 1 To be continued Figure 6 The implementation process of this technology shall be described or explained in detail.

[0034] The new joint structure of the column stirrups and steel-concrete column includes steel section 10, steel stirrup 20, rib plate 30, tie bar 40 and shear nail 13. Specifically, the original structural column structure is upgraded and iterated by using rib plate and changing the shape and fixing method of tie bar 40.

[0035] The steel section 10 is a cross-shaped structure composed of four webs 11 and four flanges 12. The flanges 12 are welded vertically to the outer surface of the webs. The four webs and four flanges are generally arranged vertically along the direction of gravity. After welding, they form a single unit.

[0036] Shear studs 13 are welded to the outer surface of the wing plate. The method of welding the shear studs to the steel wing plate is existing technology and will not be described in detail.

[0037] The cross-sectional view of section steel 10 can be referenced. Figure 2 The outline shown indicates that when the node is constructed as a steel-concrete composite column, the cross-section is a horizontal node surface.

[0038] The reinforcing hoop 20 is a rectangular steel hoop formed by bending φ20 (mm) threaded steel. This hoop is placed around the perimeter of the steel section, maintaining an appropriate distance from it, for example, 10 cm apart. Correspondingly, the hoop is tied to the vertically placed straight bars, and also to the tie bars. Through these tyings, the reinforcing hoop, straight bars, and tie bars form a reinforcing cage.

[0039] In this embodiment, a rib plate 30 is welded and fixed every meter from top to bottom within the right-angle region between two adjacent web plates. This rib plate is an L-shaped steel plate with a thickness equal to or slightly less than that of the web plate. The rib plate is a standard component and can be mass-produced. The two ends of the rib plate 30 are welded and fixed to the two web plates 11. A transverse tie rod is welded and fixed to the upper surface of the rib plate, and a longitudinal tie rod is welded to the lower surface of the rib plate. In this embodiment, the longitudinal and transverse tie rods have the same size and outline, both being U-shaped threaded steel bars; they are simply further divided into longitudinal and transverse tie rods 40 for ease of description. In this embodiment, the longitudinal and transverse tie rods are arranged perpendicularly to assist in fixing the reinforcing bars from two vertical directions. The presence of this rib plate provides fixing points for the tie rods and replaces the original processing method of drilling holes in the web plate, eliminating the need for drilling. Furthermore, the welded rib plate 30 further enhances the rigidity of the steel section 10.

[0040] Furthermore, a hook is provided at the end of the tie bar, which is tied to the steel hoop.

[0041] Furthermore, four ribs are welded in each of the above-mentioned identical horizontal planes, that is, one rib is set in each right-angle area to achieve the best stress effect and facilitate standardized implementation.

[0042] The presence of this rib 30 adds an extra support between the webs, thereby enhancing the stiffness between the webs and improving the compressive and torsional resistance of the structural column.

[0043] The ribs 30 in this structure exist in a geometrically symmetrical manner within the structural columns, which meets the requirements of architectural standardization and aesthetics.

[0044] In theory, the performance requirements can be met if the rib is the same thickness as the web 11 or slightly thinner.

[0045] The aforementioned ribs can also form weld points with the outer flange 12, further enhancing the overall torsional resistance of the structural column.

[0046] The rib exists perpendicularly to the web and flange, meaning that the rib, web, and flange are located on the XYZ planes respectively, making the rib part of the steel profile and thus improving its stiffness.

[0047] In this embodiment, the ribs must not be tilted.

[0048] The implementation of this technology reduces the number of tie rods used while maintaining the overall rigidity of the structural column, resulting in significant energy-saving and emission-reduction effects.

[0049] Compared to the drilling and installation of tie rods, a replacement solution can be formed simply by welding ribs, which greatly reduces the workload, lowers labor costs, increases construction speed, and ensures construction quality.

[0050] Compared to the drilling method for installing tie rods 40, the welding method is more convenient for construction.

[0051] Finally, formwork 04 is erected and concrete 50 is poured to form the steel-concrete structural column described in this technology. After demolding, the structural column forms a structure combining steel bars, steel sections, and concrete, and has all the performance indicators of a steel-concrete column.

[0052] This technological improvement is implemented based on existing technical specifications, avoiding the need for drilling operations on the web of the steel profile, and requires no modification to the construction process, making it highly valuable for widespread application.

[0053] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Without departing from the spirit of the present utility model, all modifications and improvements to the present utility model by those skilled in the art should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A novel joint structure for column stirrups and steel-concrete composite columns, comprising steel sections, stirrups, ribs, tie bars, and concrete, wherein... The steel section is composed of a web, flanges, and shear studs. The web consists of two perpendicular steel plates welded together to form a cross shape. The flanges are welded vertically to the outer edge of the web, and shear studs are welded to the outer surface of the flanges. The section is characterized by: ribs being welded and fixed in the right-angle region between two adjacent webs. These ribs are horizontally arranged, and at least one tie bar is welded and fixed to each rib. The tie bar is tied to the reinforcing hoop, which surrounds the steel section. The steel section, reinforcing hoop, ribs, and tie bars are encased in concrete.

2. The novel joint structure of column stirrups and steel-concrete composite columns according to claim 1, characterized in that, The ribs are spaced one meter apart from top to bottom.

3. The novel joint structure of column stirrups and steel-concrete composite columns according to claim 1, characterized in that, The steel reinforcement hoop is a rectangular steel hoop formed by bending threaded steel. The steel reinforcement hoop is placed around the steel section and is equidistant from the steel section. The steel reinforcement hoop is tied to the vertically arranged straight bars.

4. The novel joint structure of column stirrups and steel-concrete composite columns according to claim 1, characterized in that, The rib is an L-shaped steel plate, and the two ends of the rib are welded and fixed to the web.

5. The novel joint structure of column stirrups and steel-concrete composite columns according to claim 1, characterized in that, The thickness of the steel plate of the rib is less than or equal to the thickness of the steel plate of the web.

6. The novel joint structure of column stirrups and steel-concrete composite columns according to claim 1, characterized in that, There are weld points between the rib and the adjacent wing plate.

7. The novel joint structure of column stirrups and steel-concrete composite columns according to claim 1, characterized in that, The ribs are perpendicular to the web and wing plates, respectively.

8. The novel joint structure of column stirrups and steel-concrete composite columns according to claim 1, characterized in that, The tie bar is a U-shaped bent steel bar with a hook at the end, which is tied to the steel bar hoop.

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