JP2570578Y2 - Concrete filled steel pipe column - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete-filled steel tubular column in which concrete is filled inside a steel tubular column.

[0002]

2. Description of the Related Art In general, concrete-filled steel pipe columns are often used for columns of high-rise buildings, but when the concrete-filled steel pipe columns have insufficient strength, a reinforcing bar is inserted into the steel pipe columns to improve the strength. Has been proposed. As concrete-filled steel pipe columns into which reinforcing bars are inserted as described above, for example, those disclosed in Japanese Utility Model Laid-Open No. 63-21301 and Japanese Utility Model Laid-Open No. 64-10122 have conventionally existed.

That is, in these conventional concrete-filled steel pipe columns, a reinforcing bar basket consisting of a column main bar and a hoop bar or a spiral bar is inserted into the steel tube column, and concrete is filled in the steel tube column in this state.

[0004]

However, in such a conventional concrete-filled steel pipe column, the operation of inserting a steel cage into the steel pipe column and then filling the steel pipe column with concrete is repeated. Are sequentially extended. In this case, the reinforcing rod cages are also sequentially connected with the extension of the steel pipe columns.

However, in connecting the reinforcing bar cages in this way, it is extremely difficult to adjust the position of the connecting portion between the column main bars. Therefore, there is a problem that a great deal of time is required for extending the concrete-filled steel pipe column, and the construction period is lengthened.

In view of the above-mentioned problems, the present invention makes it possible to easily adjust the position of the connection between the main bars of the column disposed in the steel pipe column and to perform concrete adjustment.
It is an object of the present invention to provide a concrete-filled steel pipe column having improved filling properties .

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a concrete-filled steel pipe column which is constructed by arranging column main reinforcement and filling concrete in a steel pipe column. inside said tubular columns is provided with a fixing member for fixing the pillar main reinforcement, the pillar into the fixing member
Fix the main rebar and connect the connection part of the column main rebar to the upper and lower beam connection positions
Be set at the middle of the column, and
It is characterized by providing a pressure inlet for concrete .

[0008]

In the concrete-filled steel pipe column of the present invention having the above-described structure, a fixing member is provided inside the steel pipe column so that the main bar of the column can be fixed to the fixing member. In this case, the positioning adjustment between the main pillars can be accurately performed at the fixing member position.

Further, since the column main reinforcement is fixed to the steel pipe column via the fixing member, there is no need to provide a reinforcing bar, for example, a hoop reinforcement, for binding the plurality of column main reinforcements together, and the structure is simplified. be able to.

[0010] Furthermore, since the column main reinforcement can be attached to a steel pipe column in advance in a factory or the like and carried into the site, the work of assembling the rebar at the site is not required, and rapid progress of the construction can be ensured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 and 2 show a concrete-filled steel pipe column 10 showing an embodiment of the present invention. FIG. 1 is a sectional front view of a main part, and FIG. 2 is a sectional view taken along line AA in FIG.

In FIG. 1, reference numeral 12 denotes a concrete-filled steel tubular column 1
0 is a single column unit, and the column unit 12 is a steel tube column 14 having a rectangular cross section and a predetermined length.
And a steel beam 16 having an H-shaped cross section fixed to the outside of the central portion of the steel pipe column 14, and a column main bar 18 made of a plurality of screw rebars and the like arranged inside the steel pipe column 14.

Inside the steel pipe column 14, a pair of upper and lower inner diaphragms 20 is fixed so as to be continuous with the extension of the upper and lower flanges 16a, 16b of the steel beam 16 corresponding to the portion to which the steel beam 16 is connected. It is set up. As shown in FIG. 2, the inner diaphragm 20 is fixedly provided over the entire inner periphery of the steel pipe column 14, and a circular opening 22 is formed at the center thereof. The area of the opening 22 is set so that when the concrete is filled in the steel pipe column 14 as described later, the concrete can be guided sufficiently in the vertical direction.

The inner diaphragm 20 is connected to the column main reinforcement 18.
The inner diaphragm 20 has a plurality of through holes 24 through which the main pillars 18 are inserted.
Are formed along the inner shape of the steel pipe column 14. The column main bars 18 inserted one by one into these through holes 24, respectively.
Are fixed to the inner diaphragm 20 via screws or wedges. The column main bar 18 is abutted on the lower column main bar 18 while being fixed to the inner diaphragm 20. At this time, the positioning adjustment between the column main bars 18 can be achieved by adjusting the vertical position when fixing the column main bars 18 to the inner diaphragm 20 with screws or the like.

When constructing the concrete-filled steel pipe column 10 of this embodiment with the above configuration, first, the column unit 12
Are connected coaxially to form a plurality of pillar units 12.
Concrete is continuously filled into the steel pipe pillars 14 of FIG. At this time, a concrete pressure inlet 30 is formed in the steel pipe column 14 of the lowermost column unit 12, and the pressure inlet 30 is formed.
The concrete is press-fitted into the plurality of column units 12 from above.

The connection of the steel pipe columns 14 is performed by welding the end faces to each other, and at this time, the column main bars 18 fixed inside the steel pipe columns 14 are also butted to each other. In this state, the concrete press-fitted from the press-in port 30 is hardened, so that the column main reinforcing bars 18 in abutting relationship are connected to each other via the concrete. In this way, the concrete-filled steel pipe column 10 repeats the operation of connecting the plurality of column units 12 and filling concrete, and successively adds the column units 12 upward to the target height. In this way, when the pillar unit 12 is connected,
The connection portion between the steel pipe column 14 and the column main reinforcement 18 can be set as a portion having the smallest moment away from the steel beam 16 to which a large load is transmitted.

In this embodiment, the steel pipe column 14
Since the main pillars 18 arranged inside the inner diaphragm 20 can be fixed to the inner diaphragm 20, the positioning adjustment of the main pillars 18 can be accurately performed at the position of the inner diaphragm 20. Therefore, when the steel pipe columns 14 are sequentially added, the column main reinforcements 18 can be connected with high accuracy.

Further, in this embodiment, since the column main bars 18 are fixed to the inner diaphragm 20, there is no need to provide reinforcing bars used for binding the column main bars together, for example, hoop bars, etc. It can be simplified.

Furthermore, since the column main reinforcing bar 18 can be assembled into the steel pipe column 14 in advance in a factory or the like and brought into the site, the rebar assembling work on site is not required.
Construction can proceed promptly to shorten the construction period.

FIG. 3 shows another embodiment. In the above-described embodiment, the case where the main column bars 18 are connected by butt is disclosed. In this embodiment, the ends of the main column bars 18 are overlapped with each other. Therefore, in this embodiment, by connecting the steel pipe columns 14 and filling with concrete, the ends of the upper and lower column main reinforcements 18 form a lap joint, and the connection strength can be increased, and a large moment can be withstood. can do.

[0021]

[Effects of the Invention] In the concrete-filled steel pipe column of the present invention described above, a fixing member is provided inside the steel pipe column,
Since the main pillars can be fixed to the fixing member, when the steel pipe columns are successively added, the positioning adjustment of the main pillars can be accurately performed at the fixing member position. Further, since the column main reinforcement is fixed to the steel pipe column via the fixing member, there is no need to provide a reinforcing bar for binding the plurality of column main reinforcements to each other, and the configuration can be simplified.
Further, since the column main reinforcement can be attached to a steel pipe column in advance in a factory or the like and can be carried into the site, there is no need for assembling rebar at the site, and various excellent effects that prompt progress of the construction can be secured. To play. Also, the fixing unit
Fixing the column main reinforcement to the material and connecting the connection of the column main reinforcement to the upper and lower beams
Set to the middle part of the position, and
Since the cleat pressure inlet is provided, the steel pipe column
Avoid concrete reinforcement inside and avoid concrete
By press-fitting from below,
The filling property of concrete can be enhanced.

[Brief description of the drawings]

FIG. 1 is a sectional front view of a main part showing an embodiment of a concrete-filled steel pipe column according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional front view of a main part showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Concrete-filled steel pipe column 12 Column unit 14 Steel pipe column 16 Steel beam 18 Column main reinforcement 20 Inner diaphragm

Continuation of the front page (72) Inventor Noriyuki Furuya 4-640 Shimoseito, Kiyose-shi, Tokyo Inside Obayashi Corporation Technical Research Institute (56) References JP-A-64-75763 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A concrete-filled steel pipe column in which a steel bar is provided inside a steel pipe column and is filled with concrete, and a fixing member for fixing the steel bar inside the steel pipe column at a beam connection position. Provided on the fixing member,
Fix the main rebar and connect the connection part of the column main rebar to the upper and lower beam connection positions
Be set at the middle of the column, and
A concrete-filled steel pipe column provided with a concrete pressure inlet .