JPH0512515U - Concrete filled steel tubular columns - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a concrete-filled steel tubular column in which the positioning and adjustment of the connecting portions of the column main bars arranged in the steel tubular column can be easily performed. [Structure] An inner diaphragm 20 is fixedly provided inside the steel pipe pillar 14 corresponding to a portion to which the steel beam 16 is connected. The inner diaphragm 20 is formed with a plurality of through holes 24 through which the column main bars 18 are inserted. 1 for each of these through holes 24
The pillar main bars 18 inserted one by one are fixed to the inner diaphragm 20 via screws or wedges. Then, the pillar 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 is achieved by adjusting the vertical position when the column main bars 18 are fixed to the inner diaphragm 20 with screws or the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a concrete-filled steel pipe column in which concrete is filled inside the steel pipe column.

[0002]

[Prior Art]

 In general, concrete-filled steel tubular columns are often used as columns for high-rise buildings, but if the concrete-filled steel tubular columns do not have sufficient yield strength, it has been proposed to insert reinforcing bars into the steel tubular columns to improve their strength. There is. As concrete-filled steel pipe columns into which the reinforcing bars are inserted in this manner, there have been conventionally those disclosed in, for example, Japanese Utility Model Publication No. 63-21301 or Japanese Utility Model Publication No. 6-10122.

That is, in these conventional concrete-filled steel tubular columns, a reinforcing rod cage composed of a column main bar and a hoop or spiral bar is inserted into the steel tubular column, and in this state, concrete is filled into the steel tubular column.

[0004]

[Problems to be solved by the device]

 However, in such a conventional concrete-filled steel tubular column, the work of inserting the reinforcing rod cage into the steel tubular column and then filling the steel tubular column with concrete is repeated to sequentially extend the concrete-filled steel tubular column. In this case, the rebar cages will also be connected one by one as the steel pipe columns are extended.

However, when connecting the rebar cages in this way, it becomes extremely difficult to adjust the positioning of the connecting portion between the column main bars. Therefore, there has been a problem that a great deal of time is spent on the extension work of the concrete-filled steel tubular columns, and the construction period is lengthened.

Therefore, in view of the above conventional problems, the present invention provides a concrete-filled steel tubular column capable of easily performing positioning adjustment of the connecting portion of the column main reinforcements arranged in the steel tubular column. To aim.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a concrete-filled steel pipe column in which main column bars are arranged and concrete is filled in the steel pipe column, and the inside of the steel pipe column at the beam connection position is It is characterized in that a fixing member for fixing the pillar main bar is provided.

[0008]

[Action]

 In the concrete-filled steel tubular column of the present invention having the above configuration, the fixing member is provided inside the steel tubular column so that the column main bar can be fixed to the fixing member. Positioning adjustment of the column main bars can be accurately performed at this fixing member position.

Further, since the column main bar is fixed to the steel pipe column via the fixing member, it is not necessary to provide a reinforcing bar for binding the plurality of column main bars to each other, for example, a hoop bar or the like, and the structure is simplified. be able to.

Further, since the column main bar can be attached to a steel pipe column in advance in a factory or the like so that it can be carried into the field, it is possible to secure a prompt progress of the work without requiring a rebar assembling work on site.

[0011]

【Example】

 Hereinafter, an embodiment of the present invention will be described 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 portion, and FIG. 2 is a sectional view taken along the line AA in FIG.

In FIG. 1, reference numeral 12 is one column unit for constructing a concrete-filled steel pipe column 10. This column unit 12 is a steel pipe column 14 having a rectangular cross section formed to a predetermined length, and this steel pipe column. A steel beam 16 having an H-shaped cross section, which is fixed to the outside of the central portion of the steel pipe 14, and a column main bar 18 made of a plurality of screw reinforcing bars and the like arranged inside the steel pipe column 14.

Inside the steel pipe pillar 14, an inner diaphragm 20 is vertically arranged so as to be continuous with an extension of the upper and lower flanges 16 a and 16 b of the steel beam 16, corresponding to a portion to which the steel beam 16 is connected. One pair is fixed. As shown in FIG. 2, the inner diaphragm 20 is fixed around the entire inner circumference 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 the concrete can be sufficiently guided in the vertical direction when the concrete is filled in the steel pipe pillar 14 as described later.

The inner diaphragm 20 is used as a fixing member of the column main bar 18, and a plurality of through holes 24 for inserting the respective column main bars 18 are formed in the inner diaphragm 20 along the inner shape of the steel pipe column 14. Formed. The column main bars 18 inserted into the through holes 24 one by one are fixed to the inner diaphragm 20 via screws or wedges. Then, the pillar main reinforcement 18 is fixed to the inner diaphragm 20 and abuts the lower pillar main reinforcement 18. At this time, the positional adjustment between the column main bars 18 can be achieved by adjusting the upper and lower positions when the column main bars 18 are fixed to the inner diaphragm 20 with screws or the like.

In the case of constructing the concrete-filled steel tubular column 10 of the present embodiment with the above configuration, first, 2-3 column units 12 are coaxially connected to each other, and the inside of the steel tubular column 14 of the plurality of column units 12 is connected. Continuously fill with concrete. At this time, a concrete pressure inlet 30 is formed in the steel pipe pillar 14 of the lowermost pillar unit 12, and concrete is pressed into the plurality of pillar units 12 from this pressure inlet 30. ..

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

By the way, in this embodiment, since the column main bar 18 arranged inside the steel pipe column 14 can be fixed to the inner diaphragm 20, the positioning adjustment of the column main bars 18 can be performed by adjusting the position of the inner diaphragm 20. Can be done accurately. Therefore, when the steel pipe columns 14 are successively added, the column main bars 18 can be accurately connected.

Further, in the present embodiment, since the column main bars 18 are fixed to the inner diaphragm 20, it is not necessary to provide reinforcing bars used for binding the column main bars to each other, for example, hoop bars, and the configuration thereof is greatly improved. It can be simplified.

Furthermore, since the column main bar 18 can be assembled in advance to the steel pipe column 14 in a factory or the like and can be carried into the field, there is no need for on-site rebar assembly work, and the construction can be carried out quickly. The work period can be shortened.

FIG. 3 shows another embodiment, and in the above-described embodiment, the case where the column main bars 18 are connected by butting is disclosed. In this example, the ends of the column main 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 bars 18 form a lap joint, and the connection strength thereof can be increased, resulting in a large moment. Can withstand.

[0021]

[Effect of the device]

 In the concrete-filled steel pipe column of the present invention described above, the fixing member is provided inside the steel pipe column so that the main bar of the column can be fixed to this fixing member. Positioning adjustment of the column main bars can be accurately performed at this fixing member position. Further, since the column main reinforcement is fixed to the steel pipe column via the fixing member, it is not necessary to provide a reinforcing reinforcement for binding a plurality of column main reinforcements to each other, and the structure can be simplified. Furthermore, since the column main bars can be attached to steel pipe columns in advance in a factory etc. and carried into the site, there is no need for on-site rebar assembly work, and it is possible to secure a rapid progress in construction. Play.

[Brief description of 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 cross-sectional view taken along the line AA in FIG.

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

[Explanation of symbols]

10 Concrete-filled steel tubular column 12 Column unit 14 Steel tubular column 16 Steel beam 18 Column main bar 20 Inner diaphragm

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Noriyuki Furuya 4-640 Shimoseido, Kiyose City, Tokyo Obayashi Corporation Technical Research Institute Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A concrete-filled steel tubular column configured by disposing a column main bar in a steel tubular column and filling with concrete, and a fixing member for fixing the column main bar inside the steel tubular column at a beam connection position. A concrete-filled steel pipe column characterized by being provided with.