JPH0510085Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a pillar capital used in a building employing, for example, a flat slab structure.

“Conventional technology” The conventional structure of this type of capital is as follows:
The ones shown in FIGS. 3 and 4 are known.

In these figures, reference numeral 1 indicates a part of a flat slab, and the surface of this flat slab 1 is virtually divided into a column band a and an intercolumn band b at the time of design. In the column band a,
Pillars 3, 3, . . . each having a predetermined height and each having a capital (column head) 2 formed in a rectangular planar shape on the upper part are arranged at predetermined intervals. The capital 2 is arranged so that its sides 2a are parallel to the columnar band. Therefore, the corner portions 2b of the capital 2 are arranged so as to face the corner portions 2b of the capitals 2 of the other pillars 3, 3, . The straight line connecting 2b, that is, the diagonal line, is not parallel to the direction in which the column band extends.

``The problem that the idea is trying to solve'' However, in the conventional capital,
The corner 2b of the capital faces the corner 2b of the capital of another column located diagonally, and the rigidity of the capital is high, so the vertical load from the slab is concentrated on the capital. In particular, significant stress concentration occurs at the corners of the capital. Therefore, in order to alleviate the stress concentration that occurs at the corners of the capital, it is necessary to take measures such as arranging reinforcement at the top of the column band over a wide area and reinforcing that part, which reduces the construction cost. The problem was that it was causing an increase in the number of workers and delays in the construction period.

This invention was made in view of the above problems,
The purpose of this project is to provide a diagonal capital that can reduce the construction area of the upper end reinforcement to alleviate the stress concentration that occurs at the corners, and as a result, reduce construction costs and shorten the construction period. There is.

"Means for Solving the Problems" In the present invention, the diagonal lines formed on the surface of the planar quadrangular capital are arranged to be approximately parallel to the direction in which the column bands extend.

"Example" The present invention will be described below with reference to the drawings.
1 and 2 show an embodiment of the present invention, in which FIG. 1 is a plan view of a portion of a flat slab, and FIG. 2 is a front view partially cut away.
In these figures, the same elements as those shown in the prior art are designated by the same reference numerals, and the explanation thereof will be omitted.

As shown in FIG. 1, the surface of the flat slab 1 is divided into a column band a and an intercolumn band b, which are virtually provided at the time of design. The column band a has a predetermined height, and a straight line connecting the corners 2b, 2b of the capital 2, which is rectangular in plane, i.e.,
The capital 2 is arranged so that the diagonal line 1 is parallel to the direction in which the column band a extends. In other words, the capital 2 is placed around the vertical axis of the column 3.
It is configured to be installed in a 45° rotated state.

Therefore, the corner 2b, where stress concentration occurs due to the vertical load from the slab 1, is located approximately at the center of the column band a. and the columnar band a
is originally made of reinforcing steel or unbonded PS to bear a larger bending moment than the intercolumn zone b.
By increasing the number of steel wires, etc., and by centrally arranging steel materials and PS steel wires in those areas, it is possible to reduce the construction area for the column band upper end reinforcement.

In addition, if a beam shape is provided in the column band a section to form a flat beam, a horizontal haunch will be provided at the end of the beam shape, making reinforcing work easier, and PS steel wires can be inserted into the beam shape. If they are placed in a concentrated manner, reinforcement can be arranged according to the stress, the rise of the PS steel wire can be increased, and the cancel rate of bending moments generated by vertical loads can be increased.

Therefore, in the diagonal capital of the present invention, the corner portion 2b of the capital is located approximately in the center of the column band a where a large bending moment acts,
Efficient and appropriate reinforcement and PS steel wire can be placed at the corners of the capital where significant stress concentration occurs, reducing the stress concentration occurring at the corners and reducing the area in a smaller area than before. Reinforcement and
All you need to do is install PS steel wire, which can reduce construction costs and shorten the construction period.

"Effects of the Invention" As described above, in the present invention, the diagonal lines of the planar rectangular capital are arranged to be approximately parallel to the direction in which the column strips extend, so that the corners of the capital are It is located approximately in the center of the column belt where a large bending moment normally acts.
It is possible to reduce the reinforcement arrangement range of the upper end reinforcement to alleviate the stress concentration occurring at the corner, and as a result, it is possible to reduce the construction cost and shorten the construction period.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention. FIG. 1 is a plan view of a portion of a flat slab, FIG. 2 is a partially sectional front view of FIG. 1, and FIG.
Figure 4 shows the conventional technology, and Figure 3 shows the conventional technology.
The figure is a plan view of a portion of the flat slab, and FIG. 4 is a front view of the portion shown in FIG. 3 in cross section. 1...Flat slab, 2...Capital, 3
...column, a...column band, l...diagonal line.

Claims (1)

[Scope of utility model registration request] A structure of a capital of columns arranged along a column band of a flat slab and formed into a rectangular plane, wherein a diagonal line formed on the surface of the capital of the rectangular plane extends in the direction in which the column band extends. A diagonal capital characterized by being arranged almost parallel to the .