JP2004131960A - Coupling structure of column main reinforcement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coupling structure of column main reinforcements capable of forming an inexpensive reinforced concrete column with a simple structure. <P>SOLUTION: A square column is used for a column 3. The column main reinforcements 4 comprise first column main reinforcements 5 disposed at four corners thereof and a plurality of second column main reinforcements 6 disposed between adjacent first column main reinforcements 5 at specified intervals. These reinforcements are formed so that multiple ones are connected to each other in the vertical direction and the total length thereof connected is short of the length of the members of the column 3. The upper and lower end parts 5a and 5b opposed in the vertical direction do not come into contact with each other, and the upper and lower end parts 6a and 6b do not come into contact with each other. The column main reinforcements 4 of such a structure are formed so that the first column main reinforcements 5 are disposed coaxially with each other in the vertical direction, and the opposed upper and lower end parts 5a and 5b are mechanically connected to each other through a mechanical coupling 8. Since the upper and lower end parts 6a and 6b are not connected to each other though the second column main reinforcements 6 are disposed coaxially with each other in the vertical direction, they form free ends. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a joint structure of a main bar of a reinforced concrete column.
[0002]
[Prior art]
In general, in a building having columns and beams made of reinforced concrete, a mechanical joint is used when connecting reinforcing bars arranged continuously in the vertical or horizontal direction (for example, Patent Document 1). FIG. 9).
By the way, conventionally, a high-strength large-diameter steel bar has been generally used as a column main bar of a column constituting a high-rise or super-high-rise building. When these large-diameter reinforcing bars are continuously arranged in the vertical direction and connected, a mechanical joint such as a sleeve is similarly used.
[0003]
[Patent Document 1]
Japanese Patent Publication No. 3-5453 (refer to FIG. 9)
[0004]
[Problems to be solved by the invention]
However, a mechanical joint used for a large-diameter reinforcing bar has a high material cost, and accounts for about one third of the cost required for constructing one pillar.
[0005]
In view of the above-mentioned circumstances, an object of the present invention is to provide a joint structure of a main bar of a pillar that constitutes an inexpensive reinforced concrete pillar with a simple configuration.
[0006]
[Means for Solving the Problems]
The joint structure of the column main reinforcement according to claim 1 is a joint structure of a column main reinforcement constituting the column of a building constructed on a high-rise or a super-high-rise and including a reinforced concrete column and a beam. The column main reinforcement extending in the vertical axis direction is disposed at each of four locations at every 90 ° with the extension axis of the column as the central axis, and a plurality of first column main reinforcements vertically connected to each other, and a plurality of vertically connected columns as well. And a plurality of second column main bars arranged at predetermined intervals between the adjacent first column main bars, and the first column main bars connected vertically are arranged in a vertical direction. Mechanical joints are formed at opposite upper and lower ends that are coaxially arranged, and the second main pillars are coaxially arranged in the vertical direction. The joint of each of the first column main reinforcement and the second column main reinforcement is It is characterized by being formed into a height position sandwiched between the beams that are arranged in parallel vertically.
[0007]
The joint structure of the column main reinforcement according to claim 2 is characterized in that the joint portions of the second column main reinforcement are horizontally arranged in parallel.
[0008]
The joint structure of the column main reinforcement according to claim 3 is characterized in that the joint portions of the second column main reinforcement are staggered up and down.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1 and 2 show the joint structure of the main bar of the present invention.
[0010]
(First Embodiment)
As shown in FIG. 1, a high-rise or super-high-rise building 1 includes a reinforced concrete column 3 and a reinforced concrete beam 2. The column 3 includes a plurality of generally used column main reinforcements 4 extending in the vertical direction, a plurality of horizontally arranged band reinforcements 7 surrounding the column main reinforcement 4, and burying these. And concrete 9 cast as described above. In the present embodiment, the closed stirrups 7 arranged so as to surround the column main bars 4 are used. However, the present invention is not limited to this. Any type of stirrup 7 may be used as long as it is possible.
In the present embodiment, as shown in FIG. 2, a prism is used as the column 3. For the column main bar 4 having such a cross section, a high-strength (SD390, SD490, etc.) large-diameter reinforcing bar (maximum D41) is used, and the first column arranged at each of the four corners when viewed from the column cross section. A main bar 5 and a plurality of second column main bars 6 arranged at predetermined intervals so as to be sandwiched between adjacent first column main bars 5 are provided. The column 3 having such a column main bar 4 is not necessarily limited to a prism, but may be a column or a column having an irregular cross section. In this case, the first pillar main reinforcements 5 are arranged at four positions every 90 ° with the extension axis of the pillar 3 as a central axis.
[0011]
Each of the first column main reinforcement 5 and the second column main reinforcement 6 is connected to each other in the vertical direction inside the column 3, and the arrangement position in the height direction is such that both ends are always connected to the column 3. It is arranged so as not to be at the same height as the joined beams 2, that is, at a height sandwiched between the beams 2 arranged vertically in parallel. At this time, each of the first column main reinforcement 5 and the second column main reinforcement 6 is formed so that the total length of all of the plurality of connections in the vertical direction is less than the member length of the column 3. The upper and lower ends 5a and 5b facing each other up and down, and the ends 6a and 6b are formed so as not to contact each other and to have a facing length.
[0012]
In the joint structure of the column main reinforcement 4 having such a configuration, the first column main reinforcement 5 is arranged coaxially in the vertical direction, and the upper and lower ends 5a and 5b facing each other are connected to the mechanical joint 8 such as a sleeve. Mechanically connected via In addition, such a structure of the joint is not limited to the mechanical joint 8 and may be a joint that can connect the ends of the first main pillars 5 arranged coaxially in the up-down direction in a state where the first main bars 5 abut each other. Either one may be used. On the other hand, the second column main reinforcement 6 is also coaxially arranged in the vertical direction, but the upper and lower ends 6a and 6b facing each other are not connected to each other, but form free ends.
[0013]
In the present embodiment, as shown in FIG. 1, the height positions of the joint portions of the second main pillars 6 are arranged in parallel. However, the height position of the joint portion of the second pillar main bar 6 is not necessarily limited to this. Therefore, another example is shown in FIG.
[0014]
(Second embodiment)
As shown in FIG. 2, the second column main reinforcement 6 is the same as in the first embodiment, and the total length of all of the plurality of columns connected vertically is less than the member length of the column 3. The upper and lower ends 6a and 6b facing up and down do not come into contact with each other. Also, the arrangement position is the same as in the first embodiment, and the plurality of second pillar main bars 6 connected in the vertical direction are arranged coaxially in the vertical direction, and are arranged so as to face each other. They do not touch and they form a free end.
The second pillar main bars 6 having such a configuration are arranged in parallel at the height position where the upper end portion 6a and the lower end portion 6b of the upper and lower second pillar bars 6 face each other, and between the adjacent second pillar main bars 6. It is formed in a zigzag arrangement that differs from the height position alternately.
[0015]
According to the above-described configuration, the joint structure of the column main reinforcement 4 is configured such that the first column main reinforcement 5 arranged at four positions at every 90 ° with respect to the extension axis of the column 3 is connected to the vertical column by mechanical coupling. No joints are provided at the upper and lower end portions 6a and 6b of the second column main bars 6 which are arranged at predetermined intervals between the adjacent first column main bars 5 using joints such as 8. Since the free ends are formed, the joint structure of the main column 4 is simplified, the workability can be improved, and it is possible to contribute to shortening the construction period and reducing the construction cost.
In addition, since the mechanical joints 8 are used only for connecting the first column main reinforcements 5 arranged at four locations in the joint structure of the column main reinforcements 4, the number of joints such as the mechanical joints 8 can be reduced. As a result, material costs can be greatly reduced, and as a result, the overall cost of construction can be significantly reduced.
[0016]
【The invention's effect】
According to the joint structure of the column main reinforcement according to claim 1, the joint structure of the column main reinforcement constituting the column is a high-rise or super-high-rise building having a reinforced concrete column and a beam. A first main bar extending in the vertical axis direction inside the column is disposed at each of four positions at 90 ° with the extension axis of the column as a central axis, and is connected to a plurality of vertical main columns. And a plurality of second pillar main bars which are also connected to each other vertically and a plurality of second pillar main bars are arranged at predetermined intervals between the adjacent first pillar main bars. The main reinforcements are arranged coaxially in the vertical direction and mechanical joints are formed at upper and lower ends facing each other, and the second column main reinforcements are arranged coaxially in the vertical direction, but each of the upper and lower ends facing each other. A first pillar main bar formed at a free end, and a second pillar Joint portions of the streaks, each is formed at a height position sandwiched between the beams that are arranged in parallel vertically. Alternatively, the joint portions of the second main pillars are horizontally arranged in parallel, or the joint portions of the second main pillars are staggered up and down.
[0017]
This makes it possible to improve the workability by simplifying the joint structure of the column main reinforcement, thereby making it possible to shorten the construction period and reduce the construction cost. Further, in the joint structure of the column main reinforcement, since the mechanical joint is used only for the connection of the first column main reinforcement arranged at four positions, the number of joints such as mechanical joints can be reduced. The cost can be greatly reduced, and thus the overall cost of construction can be significantly reduced.
[Brief description of the drawings]
FIG. 1 is a diagram showing a joint structure of a main bar of a column according to a first embodiment of the present invention.
FIG. 2 is a view showing a joint structure of a main column bar according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Building 2 Beam 3 Column 4 Column main bar 5 First column main bar 6 Second column main bar 7 Band 8 Mechanical joint 9 Concrete

Claims (3)

High-rise or super-high-rise building of a reinforced concrete building with columns and beams, the joint structure of the column main reinforcement constituting the columns,
A first column main bar extending in the vertical axis direction inside the column is disposed at each of four places at 90 ° with the column extending axis as a central axis, and a plurality of vertical column main bars are connected.
Similarly, a plurality of second main bars are connected vertically and a plurality of second main bars are arranged at predetermined intervals between the adjacent first main bars,
The first column main bars connected vertically are formed with mechanical joints at upper and lower ends facing each other and arranged coaxially in the vertical direction,
Although the second main pillars are arranged coaxially in the vertical direction, the upper and lower ends facing each other are formed as free ends,
The joint structure of the column main reinforcement, wherein a joint portion of each of the first column main reinforcement and the second column main reinforcement is formed at a height position sandwiched between beams arranged in parallel in the vertical direction. The joint structure of the column main reinforcing bar according to claim 1,
The joint structure of the column main reinforcement, wherein the joint portions of the second column main reinforcement are horizontally arranged in parallel. The joint structure of the column main reinforcing bar according to claim 1,
The joint structure of the column main reinforcement, wherein the joint portions of the second column main reinforcement are staggered up and down.

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