A prefabricated column-steel beam hybrid frame structure and construction method thereof

Abstract

The present invention discloses a prefabricated column-steel beam hybrid frame structure and a construction method thereof, including a SCFST prefabricated column, a replaceable steel beam, and a steel beam. The SCFST prefabricated column includes a steel pipe, a steel cage, and a column core. The SCFST prefabricated column and the replaceable steel beam are fixedly connected by a friction plate, and holes are reserved on the friction to connect the prefabricated column and the replaceable steel beam through bolts; the connection between the replaceable steel beam and the steel beam is that the replaceable steel beam and the steel beam are directly connected through the friction plate provided; the upper and lower column ends of the prefabricated column are connected by flanges with the same caliber provided at the column ends, which are connected by bolts, and can accurately position the column core at the axial position of the column, and the flanges are provided with reinforcing ribs. The hybrid frame structure of the present invention can not only use internal filling stones to improve the column bearing capacity and improve the overall frame seismic performance, but also realize the prefabrication of the SCFST column, realize the assembly of the prefabricated column-steel beam hybrid frame structure, and only use bolts for installation during the installation process, thereby reducing the workload of the staff and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of composite structure buildings, and in particular to a prefabricated column-steel beam hybrid frame structure and a construction method thereof. Background Art

[0002] Building industrialization is the current development trend in my country's construction field and is the direction that the country strongly supports. Prefabricated and assembled structures are the product of building industrialization, with advantages such as fast construction pace and simple production process. Its main core is to reduce on-site workload and simplify on-site construction work.

[0003] SCFST columns are a composite structure that reuses the stone materials left over from demolished stone structures, which can improve the compressive strength of the composite structure and greatly reduce the amount of concrete, thus meeting the needs of green and sustainable development. However, the internally filled stone steel tube concrete composite column requires refined construction, so simplifying the construction process of the internally filled stone steel tube concrete composite column is a key technology.

[0004] At present, in actual projects, the main body of the frame structure is damaged under the action of earthquake. Although the frame structure will not collapse as a whole, it is difficult to carry out post-earthquake repair, resulting in a waste of resources. Therefore, it is very necessary to control the concentrated deformation of the frame structure. Summary of the invention

[0005] The purpose of the present invention is to provide a prefabricated column-steel beam hybrid frame structure and a construction method thereof in view of the fact that SCFST composite columns are difficult to construct on site and the composite frame structure has poor centralized deformation control, in line with the development trend of building industrialization.

[0006] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a prefabricated column-steel beam hybrid frame structure, including prefabricated columns and steel beams, the prefabricated columns include hollow steel pipes, column cores, and steel cages, the column cores are hoisted through the steel cages and positioned at the axis of the steel pipes, flanges are provided at both upper and lower ends of the steel pipes, and the flanges are used to connect the upper and lower column ends; a connecting section is provided along the middle of the outer wall of the steel pipe, and the connecting section is used to be fixedly connected to the steel beams.

[0007] Preferably, grouting holes and grouting holes are respectively provided near the end points at the upper and lower parts of the steel pipe, and the grouting section is located between the grouting holes and the grouting holes.

[0008] Preferably, the column core is formed by stacking multiple sections of stone with the same cross-section, and a concrete layer is provided between two adjacent sections of stone, the concrete layer is filled between the inner wall of the steel pipe and the outer wall of the column core, and the filling height of the concrete layer is between the grouting holes at the upper and lower ends of the prefabricated column.

[0009] Preferably, reinforcing ribs are provided at the edge of the flange.

[0010] Preferably, the connecting section is a two-pronged or three-pronged connecting section, the angle between each fork is 90°, and a friction plate is welded at the end of each fork of the connecting section.

[0011] Preferably, the connecting section is fixedly connected to the steel beam via a replaceable beam.

[0012] Preferably, the replaceable beam comprises a variable-section steel beam, friction plates are respectively welded at both ends of the variable-section steel beam, and the friction plates at both ends are fixedly connected to the friction plates of the connecting section and the steel beam by bolts.

[0013] A method for constructing a prefabricated column-steel beam hybrid frame structure, applied to the above-mentioned prefabricated column-steel beam hybrid frame structure, comprises the following steps:

[0014] 1) Connection of the upper and lower ends of the prefabricated column: Connect the upper and lower prefabricated column ends with bolts, tighten the bolts, inject slurry into the upper grouting hole of the lower column section, and let the slurry pass through the flange into the lower end of the upper column section. After the grouting section is filled, the slurry is discharged from the slurry outlet hole below the upper column section to complete the connection of the prefabricated column ends;

[0015] 2) Connection between prefabricated column and replaceable beam: Tighten the bolts at the reserved bolt holes of the friction plate on the prefabricated column and the friction plate on the replaceable beam to complete the connection between the SCFST prefabricated column and the replaceable beam;

[0016] 3) Connection between the replaceable beam and the ordinary steel beam: Similarly, tighten the bolts at the reserved bolt holes on the friction plate on the replaceable beam and the friction plate on the ordinary steel beam to complete the connection between the replaceable beam and the ordinary steel beam;

[0017] 4) Repeat the above three steps to complete the prefabricated column-steel beam hybrid frame structure.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] (1) The SCFST column needs to accurately locate the axial position of the stone in the composite column, which is not easy to operate on the construction site. A prefabrication method of SCFST prefabricated columns is proposed, which can realize the prefabrication of SCFST prefabricated columns.

[0020] (2) SCFST prefabricated columns, replaceable beams, and ordinary steel beams are all processed and produced in the factory and assembled on site. Internal filler stones can be used to improve the strength of the composite columns, and replaceable beams are set up to concentrate deformation on the replaceable beams to meet the requirements of earthquake damage replacement and make the SCFST column-steel beam hybrid frame structure assembled. At the same time, all connections are bolted to avoid welding methods that will damage concrete, making it easier for installers to install and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 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 these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the SCFST column-steel beam hybrid frame structure of the present invention;

[0023] Figure 2 This is a schematic elevation diagram of the SCFST prefabricated column of the present invention;

[0024] Figure 3 This is the internal cross-sectional view of the SCFST prefabricated column steel pipe of the present invention;

[0025] Figure 4 A top view of the SCFST prefabricated column of the present invention;

[0026] Figure 5 This is a schematic elevation diagram of a replaceable beam of the present invention;

[0027] Figure 6 It is a schematic diagram of the connection between the SCFST prefabricated column and the replaceable beam of the present invention;

[0028] Figure 7 This is a cross-sectional view of the upper and lower column ends of the SCFST prefabricated column of the present invention;

[0029] Figure 8 This is a schematic diagram of the connection between columns of the SCFST prefabricated column of the present invention;

[0030] Among them, 1 prefabricated column; 2 replaceable beam; 21 variable-section steel beam; 3 steel beam; 4 bolts; 5 friction plate; 6 reinforced ribs; 11 steel pipe; 12 column core; 13 steel cage; 14 concrete layer; 15 flange; 16 connection section; 17 grouting hole; 18 slurry outlet hole; 19 grouting section. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a prefabricated column-steel beam hybrid frame structure and a construction method thereof in view of the fact that SCFST composite columns are difficult to construct on site and the composite frame structure has poor centralized deformation control, in line with the development trend of building industrialization.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-8 As shown, the present invention provides a prefabricated column-steel beam hybrid frame structure, including a prefabricated column 1, a replaceable beam 2, an ordinary steel beam 3 and a friction plate 5.

[0035] like Figure 2 As shown, the SCFST prefabricated column 1 includes a steel pipe 11, a column core 12, a steel cage 13 with a "well" shape, a concrete layer 14, a flange 15, a connecting section 16, a grouting hole 17, a grouting hole 18, a grouting section 19, a friction plate 5, and a reinforcing rib 6;

[0036] The steel pipe 11 is provided with a connecting section 16 in the middle of the column, and a friction plate 5 is welded to the end of the connecting section 16. There are flanges 15 at both ends of the column. The upper and lower ends of the column are connected at the flange 15. The connection between the upper and lower columns is at the inflection point, which is the position with the smallest load, ensuring a better connection between the columns. Grouting holes 17 and grouting holes 18 are respectively provided at a certain distance from the upper and lower ends of the steel pipe 11. After the upper and lower column end flanges 15 are connected by bolts 4, grouting is injected into the grouting hole 17 at the upper end of the lower column. The grouting section 19 is filled with grouting material from the grouting hole 17. The slurry can pass through the column end connection of the flange 15 and be poured out from the grouting hole 18 at the lower end of the upper column to complete the connection of the grouting section. Reinforcing ribs 6 are provided at the flange 15.

[0037] like Figure 3 As shown, it is the internal cross-sectional view of the SCFST prefabricated column steel pipe of the present invention. The upper surface position of the column core 12 is higher than the grouting hole 17 at the upper end of the column. The grouting section 19 is grouted through the grouting hole 17, and the grouting is completed by the grouting hole 18, which can ensure that the connection of the SCFST prefabricated column has better integrity.

[0038] like Figure 4 The top view of the SCFST prefabricated column. The column core 12 is made of multiple sections of stone with the same cross-section, and a thin layer of concrete is set between two adjacent sections of stone. The concrete layer 14 is filled between the inner wall of the steel tube 11 and the outer wall of the column core 12, and the filling height is between the slurry hole 17 at the upper end of the column and the slurry outlet hole 18 at the lower end of the column, and the SCFST prefabricated column is obtained.

[0039] like Figure 5As shown, the replaceable beam 2 includes a variable-section steel beam 21 and a friction plate. The variable section refers to a gradual change in the shape of the flange section to reduce the flange cross-sectional area; the friction plate 5 is located at both ends of the replaceable beam 2, and the replaceable beam 2 is connected to the SCFST prefabricated column 1 and the ordinary steel beam 3 respectively at the position of the friction plate 5 by bolts 4.

[0040] like Figure 6 As shown, the connection diagram of the SCFST prefabricated column 1 and the replaceable beam 2, the connection between the SCFST prefabricated column 1 and the replaceable beam is connected by bolts 4. The welding method that may damage the concrete is avoided, which facilitates the installation of the installers and improves the work efficiency.

[0041] Figure 7 This is a cross-sectional view of the connection between the upper and lower column ends of the SCFST prefabricated column of the present invention. In the SCFST prefabricated column 1, the upper surface position of the column core 12 is higher than the grouting hole 17 at the upper end of the column. After the upper and lower column ends are connected at the flange 15 by bolts 4, grouting material is poured into the grouting hole 17 at the upper end of the lower column section, and grouting material is poured out from the grouting hole 18 at the lower end of the upper column to complete the pouring of the grouting section 19, thereby ensuring that the column end connection of the SCFST prefabricated column has better integrity.

[0042] like Figure 8 As shown, it is a schematic diagram of the connection between the upper and lower ends of the SCFST prefabricated column 1. The upper and lower column ends are connected by bolts 4 at the flange 15. The connection between the upper and lower column ends is different from the traditional method. The connection position of the column end of the present invention is at the inflection point, and the load is minimal, which ensures the integrity and safety of the combined structure.

[0043] The method for making a SCFST prefabricated column comprises the following steps:

[0044] 1) A hollow steel pipe 11 is prefabricated in a factory. A connecting section 16 is provided in the middle of the column. A friction plate 5 is welded to the end of the connecting section 16. Bolt holes are reserved on the friction plate 5. The positions of the reserved bolt holes are respectively on the left and right, and symmetrical up and down. Flanges 15 are provided at both ends of the steel pipe 11. Bolt holes are also reserved at the positions of the flanges 15. Reinforcing ribs 6 are provided in the middle of adjacent bolt holes, and grouting holes 17 and grouting holes 18 are reserved at a certain distance from the upper and lower ends of the steel pipe.

[0045] 2) Stack stones with the same cross-section in sequence, insert steel bars between two adjacent stones, fill with a thin layer of concrete, and tie a steel cage around the stones. The cross-section of the steel cage is the same as the cross-section of the stone, and a "well"-shaped steel mesh is arranged on the top of the steel cage. The "well"-shaped steel mesh is located at the axial center of the steel pipe and is in contact with the inner wall of the steel pipe on all sides, forming a "well"-shaped steel cage 13 and its vertical position is flush with the reserved grouting holes 17 of the steel pipe. The upper surface of the uppermost stone is higher than the "well"-shaped steel cage 13 and also higher than the grouting holes 17.

[0046] 3) The "well"-shaped steel cage 13 with the column core 12 obtained in process 2) is directly hoisted into the prefabricated steel pipe 11, and the "well"-shaped steel cage 13 can ensure that the column core is at the axial position of the steel pipe 11, and the bottom of the "well"-shaped steel cage 13 is flush with the grouting hole 18 at the lower end of the steel pipe 11, and the top of the "well"-shaped steel cage 13 is flush with the grouting hole 17 at the upper end of the steel pipe.

[0047] 4) Fill the inner part of the steel pipe and the outer area of ​​the steel cage with concrete. The height of the filled concrete is between the grouting hole 17 and the grouting hole 18. The upper surface of the column core 12 is higher than the filled concrete, and the SCFST prefabricated column is obtained.

[0048] The construction method of the SCFST prefabricated column-steel beam hybrid frame structure comprises the following steps:

[0049] 1) For the connection of the upper and lower ends of the SCFST prefabricated column 1, the upper and lower SCFST prefabricated column ends are connected by bolts 4 at the flanges 15, the bolts 4 are tightened, and the grouting holes 17 above the lower column section are injected with slurry. The slurry passes through the flange 15 and enters the lower end of the upper column section. After the grouting section 19 is filled, the slurry is discharged from the slurry outlet holes 18 below the upper column section. The connection of the SCFST prefabricated column ends is completed;

[0050] 2) The connection between the SCFST prefabricated column 1 and the replaceable beam 2 adopts a simple connection method, and the bolts are tightened at the reserved bolt holes of the friction plate 5 on the SCFST prefabricated column 1 and the friction plate 5 on the replaceable beam 2. The connection between the SCFST prefabricated column 1 and the replaceable beam 2 is completed;

[0051] 3) The connection between the replaceable beam 2 and the ordinary steel beam 3 is similarly achieved by tightening the bolts at the reserved bolt holes on the friction plate 5 on the replaceable beam 2 and the friction plate 5 on the ordinary steel beam 3, respectively, to complete the connection between the replaceable beam 2 and the ordinary steel beam 3.

[0052] 4) Repeat the above three steps to complete the SCFST column-steel beam hybrid frame structure.

[0053] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A prefabricated column-steel beam hybrid frame structure, characterized in that: It includes a prefabricated column, a replaceable beam and a steel beam. The prefabricated column includes a hollow steel pipe, a column core and a steel cage. The column core is hoisted by the steel cage and positioned at the axis of the steel pipe. The upper and lower ends of the steel pipe are provided with flanges, and the flanges are used to connect the upper and lower column ends. A connecting section is provided along the middle of the outer wall of the steel pipe, and the connecting section is used to be fixedly connected to the steel beam. The upper and lower parts of the steel pipe are respectively provided with grouting holes and grouting holes near the end points, and the grouting section is located between the grouting holes and the grouting holes; the column core is formed by stacking multiple sections of stone with the same cross-section, and a concrete layer is provided between two adjacent sections of stone, and the concrete layer is filled between the inner wall of the steel pipe and the outer wall of the column core, and the filling height of the concrete layer is between the grouting holes at the upper and lower ends of the prefabricated column; The connecting section is a two-fork or three-fork connecting section, the angle between each fork is 90°, and a friction plate is welded at the end of each fork of the connecting section; the replaceable beam includes a variable-section steel beam, and friction plates are respectively welded at both ends of the variable-section steel beam, and the friction plates at both ends are fixedly connected to the friction plates of the connecting section and the steel beam by bolts.

2. The prefabricated column-steel beam hybrid frame structure according to claim 1 is characterized in that: Reinforced ribs are arranged at the edge of the flange.

3. A method for constructing a prefabricated column-steel beam hybrid frame structure, applied to the prefabricated column-steel beam hybrid frame structure according to any one of claims 1 to 2, characterized in that: The following steps are involved: 1) Connection of the upper and lower ends of the prefabricated column: Connect the upper and lower prefabricated column ends with bolts, tighten the bolts, inject slurry into the upper grouting hole of the lower column section, and let the slurry pass through the flange into the lower end of the upper column section. After the grouting section is filled, the slurry is discharged from the slurry outlet hole below the upper column section to complete the connection of the prefabricated column ends; 2) Connection between prefabricated column and replaceable beam: Tighten the bolts at the reserved bolt holes of the friction plate on the prefabricated column and the friction plate on the replaceable beam to complete the connection between the SCFST prefabricated column and the replaceable beam; 3) Connection between the replaceable beam and the ordinary steel beam: Similarly, tighten the bolts at the reserved bolt holes on the friction plate on the replaceable beam and the friction plate on the ordinary steel beam to complete the connection between the replaceable beam and the ordinary steel beam; 4) Repeat the above three steps to complete the prefabricated column-steel beam hybrid frame structure.

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