CN210828066U - Assembled composite section steel pipe concrete column - Google Patents

Abstract

The utility model belongs to the technical field of the engineering construction, a compound cross-section steel core concrete column of assembled is disclosed, establish the square steel pipe column in round steel pipe column periphery including round steel pipe column and cover, the inner wall welding of square steel pipe column has the peg, the isometric and axis coincidence of round steel pipe column and square steel pipe column, the hollow region precast concrete that forms is enclosed to establish with square steel pipe column has recycled concrete, the cavity of 10cm length's unprepared concrete is all left at the both ends in cavity region, the square steel pipe wall of cavity is opened there is the grout hole, the cast-in-place concrete of well kenozooecium in round steel pipe column, the assorted ring flange has all been welded to the outer peripheral face of the tip of square steel pipe column, the interval is provided with the screw on the ring flange, the welding has polylith reinforcing rib board between ring. The utility model discloses the dead weight is light, bending stiffness is big, anti-seismic performance is good and refractiveness is good, and the on-the-spot wet work is few, and the assembly degree of difficulty is low, has reduced the cost of transportation, has improved the efficiency of construction.

Description

A prefabricated composite section concrete-filled steel tubular column

technical field

The utility model relates to the technical field of engineering construction, in particular to an assembled composite section steel tube concrete column.

Background technique

Prefabricated buildings refer to buildings that are prefabricated in factories and transported to the construction site for assembly. The promotion of prefabricated buildings can not only improve the quality and quality of construction projects, but also significantly reduce building energy consumption, such as reducing construction material consumption by 20%, reducing water consumption by about 60%, concrete loss by 60%, and steel loss by 60%. etc., can increase material recovery by about 60%. The structure of the concrete column determines that it is very suitable for use in prefabricated buildings.

The connection and assembly of the existing prefabricated concrete columns mainly uses the sleeve at the bottom of the upper prefabricated concrete column to connect the protruding steel bars of the lower prefabricated concrete column. In the process of preparation, transportation or assembly, the protruding steel bars are often deformed, which makes assembly difficult and leads to slow construction; the existing precast concrete columns are heavy and have high transportation costs.

Utility model content

The utility model aims to provide an assembled composite-section concrete-filled steel tubular column, which solves the problems of high assembly difficulty, low efficiency and high transportation cost in the prior art.

The basic solution provided by the utility model is: an assembled composite-section concrete-filled steel tube column, comprising a round steel tube column and a square steel tube column sleeved on the outer periphery of the circular steel tube column, the round steel tube column and the square steel tube column are of equal length and have an axial line. Coincidence, the hollow area surrounded by the round steel pipe column and the square steel pipe column is pre-cast with concrete, the hollow part of the circular steel pipe column is cast with concrete, and the outer peripheral surfaces of the ends of the square steel pipe column are welded There is a matching flange plate, the flange plate is provided with screw holes at intervals, and a plurality of reinforcing ribs are welded between the flange plate and the square steel pipe column.

The working principle of the basic scheme: in the prefabricated site, workers weld flanges to the outer peripheral surfaces of both ends of the square steel pipe column, and weld multiple reinforcing ribs between the flange and the square steel pipe column. Place a circular steel pipe column with the same length as the square steel pipe column in the cavity, adjust the position so that the axes of the square steel pipe column and the circular steel pipe column coincide, and pre-cast concrete in the hollow area surrounded by the circular steel pipe column and the square steel pipe column . The worker transports the fabricated composite-section CFST column to the construction site, and pours concrete in-situ in the round steel tube. When two fabricated composite-section CFST columns are required to be assembled, the worker installs the flange on the upper end of one of them. The plate is fitted with the flange at the lower end of the other, and the screw holes of the two matching flanges are in one-to-one correspondence, and the two assembled composite-section concrete-filled steel tubular columns are tightly connected by nuts and studs.

The beneficial effects of the basic scheme are: 1. Compared with the prior art, the composite cross-section CFST column formed by the square steel pipe and the round steel pipe has light overall weight, high bending rigidity, good seismic performance and good fire resistance. 2. The concrete column has less wet work workload on the construction site and shortens the construction period. 3. The cavity of the round steel pipe is poured on site, and different pouring materials can be used according to the actual project and the stress condition of the column to maximize the use of material properties and save material costs; it can reduce the weight during transportation and reduce transportation costs. 4. The structure of this concrete column makes it have high bearing capacity. In actual construction, it can directly make prefabricated columns with a height of three to four stories, and can also be poured into the inner cavity of the round steel pipe, while the square steel pipe column is connected to the steel beam and bears the construction load. , improve the construction efficiency. 5. Compared with the prior art, when a plurality of composite cross-section CFST columns are assembled, the concrete in the inner cavity of the round steel tube cast in place at one time can improve the connection strength of the assembly. 6. Flange is used for assembly and connection, which is simple in positioning and convenient in operation, which reduces the difficulty of assembly and improves the construction efficiency.

Further, both ends of the hollow area are left with 10cm-long unprecast concrete cavities, and grouting holes are formed on the walls of the square steel pipes of the cavities.

After the two basic concrete columns are assembled, the grouting material is poured into the grouting hole below the assembly node, and the air is discharged from the grouting hole above the assembly node, which greatly improves the connection strength of the assembly.

Further, four steel plates are welded at even intervals along the axis direction of the outer peripheral surface of the circular steel pipe column and the precast concrete, and the ends of the steel plates away from the circular steel pipe column in the width direction abut against the inner wall of the square steel pipe column.

Through the above arrangement, the steel plate improves the flexural strength of the concrete column, and at the same time facilitates the positioning operation of the worker when installing the round steel pipe column into the square steel pipe column, thereby improving the efficiency.

Further, the inner wall of the square steel pipe column is welded with studs.

The stud enhances the adhesion between the square steel tube column and the concrete, and improves the stability of the concrete column.

Further, the concrete is recycled concrete with a replacement rate of recycled aggregate of 50%, and the recycled concrete is mixed with basalt fibers.

The ultimate load capacity of recycled concrete with a replacement rate of recycled aggregate of 50% is the best; the mechanical properties of the concrete components are greatly reduced when they are subjected to fire, and the basalt fiber can make the concrete column obtain better mechanical properties and high temperature resistance.

Description of drawings

Fig. 1 is the end face structure schematic diagram of a kind of assembled composite section concrete-filled steel tubular column of the present utility model;

FIG. 2 is a schematic diagram of the assembly structure of an assembled composite section concrete-filled steel tubular column of the present invention.

Detailed ways

The following is a further detailed description through specific embodiments:

The reference signs in the accompanying drawings include: square steel pipe column 1 , round steel pipe column 2 , hollow interlayer 3 , cavity 4 , grouting hole 5 , steel plate 6 , flange 7 , screw hole 8 , reinforcing rib 9 .

The embodiment is basically as shown in Figures 1 and 2, a prefabricated composite cross-section CFST column, comprising a round steel tube column 2 and a square steel tube column 1 sleeved on the outer circumference of the round steel tube column 2, a round steel tube column 2 and a square steel tube column 1 is of equal length and the axes are coincident, and the inner wall of the square steel pipe column 1 is welded with studs, which enhances the adhesion between the square steel pipe column 1 and the concrete, and improves the stability of the concrete column.

The hollow interlayer 3 surrounded by the round steel pipe column 2 and the square steel pipe column 1 is pre-cast with concrete, and the concrete is recycled concrete with a replacement rate of recycled aggregate of 50%. The recycled concrete is mixed with basalt fibers. The effect of tensile strength and toughness enhancement, among which basalt fiber is cost-effective, and enables the concrete column to obtain better mechanical properties and high temperature resistance. Both ends of the area of the hollow interlayer 3 are left with 10cm-long unpoured concrete cavities 4, and a grouting hole 5 is opened on the square steel pipe wall at the bottom of each cavity 4. During assembly, the grouting hole below the assembly node 5. Fill in the grouting material, and the grouting hole 5 above the assembly node is ventilated, which greatly improves the connection strength of the assembly. The outer peripheral surface of the round steel pipe column 2 and the precast concrete are welded with four steel plates 6 evenly spaced along its axis direction. On the inner wall, the steel plate 6 improves the bending strength of the concrete column, and at the same time facilitates the positioning operation of the worker when the round steel pipe column 2 is loaded into the square steel pipe column 1, thereby improving the efficiency.

The hollow part of the round steel pipe column 2 is poured with concrete, and the outer peripheral surfaces of both ends of the square steel pipe column 1 are welded with matching flanges 7, which makes the assembly simple and improves the construction efficiency. The flange plate 7 is provided with eight screw holes 8 at intervals, two on each side of the square steel pipe column 1, and eight triangular reinforcing ribs 9 are welded between the flange plate 7 and the square steel pipe column 1, Two pieces are distributed on each side of the square steel tube column 1, and the reinforcing rib plate 9 improves the strength of the connection node.

Compared with the prior art, the utility model has the advantages of light overall weight, high flexural rigidity, good seismic performance and good fire resistance; less wet work on the construction site, and shortened construction period; For on-site pouring, different pouring materials can be used according to the actual project and the stress condition of the column to maximize the use of material properties, save material costs, and also reduce the weight and transportation costs during transportation; the structure of the concrete column makes it possible It has high bearing capacity. In actual construction, it can directly make prefabricated columns with a height of three to four stories. It is also possible to pour the inner cavity 4 of the round steel pipe column 2 while the square steel pipe column 1 is connected to the steel beam and bears the construction load, which improves the construction efficiency. Efficiency; the concrete of the inner cavity 4 of the round steel pipe column 2 cast in place at one time can improve the connection strength of the assembly nodes.

During specific work, in the prefabrication site, workers weld flanges 7 to the outer peripheral surfaces of both ends of the square steel pipe column 1, weld a plurality of reinforcing ribs 9 between the flanges 7 and the square steel pipe column 1, and weld the round steel pipe Weld four steel plates 6 evenly spaced around the middle and outer circumference of the square steel pipe, place a round steel pipe of the same length as the square steel pipe into the cavity 4 of the square steel pipe, adjust the position so that the axes of the square steel pipe column 1 and the round steel pipe column 2 coincide, and when there are four steel plates 6. The hollow interlayer 3 is pre-cast with recycled concrete, and a grouting hole 5 is drilled in the square steel pipe wall at the bottom of the cavity 4 at both ends. In-situ pouring concrete, when two prefabricated composite-section concrete-filled steel tubular columns are required to be assembled, the worker attaches the flange 7 at the upper end of one to the flange 7 at the lower end of the other, and the two The screw holes 8 of the matching flanges 7 are in one-to-one correspondence, and the two assembled composite-section concrete-filled steel tubular columns are tightly matched and connected through nuts and studs, and then the grouting material is poured through the grouting holes 5 below the assembly nodes to assemble. The grouting hole 5 above the node discharges air until the grouting material completely fills the two cavities 4 at the node, and the assembly is completed after the grouting material solidifies.

The above are only the embodiments of the present invention, and the common knowledge such as the well-known specific structures and characteristics in the scheme has not been described too much here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention Under the premise of the present invention, several modifications and improvements can also be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the present invention and the practicability of the patent. The scope of protection claimed in this application shall be based on the content of the claims, and the descriptions of the specific implementation manners in the description can be used to interpret the content of the claims.

Claims (5)

1. The utility model provides an assembled composite cross section steel core concrete column which characterized in that: establish including round steel pipe post (2) and cover square steel pipe post (1) of round steel pipe post (2) periphery, isometric and the axis coincidence of round steel pipe post (2) and square steel pipe post (1), the cavity region of establishing that forms is enclosed with square steel pipe post (1) and is poured in advance to have the concrete, the cast-in-place concrete of well kenozooecium in round steel pipe post (2) has been annotated, assorted ring flange (7) have all been welded to the outer peripheral face of the tip of square steel pipe post (1), the interval is provided with screw (8) on ring flange (7), the welding has polylith reinforcing floor (9) between ring flange (7) and square steel pipe post (1).

2. The fabricated composite section concrete-filled steel tubular column as claimed in claim 1, wherein: and cavities (4) with the length of 10cm and without concrete precast are reserved at the two ends of the hollow area, and grouting holes (5) are formed in the walls of the square steel tubes of the cavities (4).

3. The fabricated composite section concrete-filled steel tubular column as claimed in claim 2, wherein: the welding that the outer peripheral face of round steel-pipe column (2) and precast concrete adhesion has four steel sheets (6) along its axis direction evenly spaced, and the tip of keeping away from round steel-pipe column (2) on steel sheet (6) width direction is contradicted on the inner wall of square steel-pipe column (1).

4. A fabricated composite section steel pipe concrete column according to any one of claims 1-3, characterized in that: the inner wall of the square steel pipe column (1) is welded with a stud.

5. The fabricated composite section concrete-filled steel tubular column as claimed in claim 4, wherein: the concrete is recycled concrete with the recycled aggregate replacement rate of 50%, and the recycled concrete is doped with basalt fibers.

Images