JP5664989B1 - Reinforcement structure of existing columns - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the work of laminating unit-enclosure steel sheets from being made thicker than necessary and the existing columns after reinforcement. A plurality of steel plate members A and B are combined to form unit-enclosed steel plates A and B, and a plurality of unit-enclosed steel plates A and B are laminated along the longitudinal direction of an existing column 8 to form unit-enclosed steel plates A. , B and the existing pillar 8, and a reinforcing structure for the existing pillar in which a grout material is filled in the gap. Further, the longitudinal stripe guide ribs 3a, 4a, 12, 13, and 14 which are the corner portions 9 and 11 of the unit enclosure steel plates A and B and project horizontally inward from the laminated surface of the enclosure steel plates A and B are provided. The vertical stripes 10 are arranged along the vertical stripe guide ribs. [Selection] Figure 1

Description

  The present invention relates to a reinforcing structure that surrounds an existing column with a unit-enclosed steel plate in which a plurality of steel plate members are combined.

As this type of existing column reinforcement structure, those shown in FIGS. 5 and 6 are conventionally known.
The conventional reinforcing structure shown in FIG. 5 is the same as that disclosed in Patent Document 1, and a plurality of unit-enclosed steel plates A are laminated along the longitudinal direction of the existing columns. And this unit enclosure steel plate A consists of the four steel plate members a, and each of these steel plate members a is as follows.

That is, each said steel plate member a is provided with the laminated ribs 3 and 4 leveled inward on the upper and lower sides of the two plate pieces 1 and 2 bent at right angles. The laminated ribs 3 and 4 are provided over the entire length of the joining portions that are joined together in the laminating direction when the unit-enclosed steel plates A are laminated.
And in the said corner part formed in the bending part of the said plate pieces 1 and 2, the laminated ribs 3 and 4 are cut diagonally, and the cut parts 5 are put together.

  The unit-enclosed steel plate A composed of the four steel plate members a as described above is laminated by laminating the laminated ribs 3 and 4 provided on them, and arranged around the existing pillars with a predetermined interval, A belt-like sheet (not shown) is pasted around it to integrate the four steel plate members a. And the grout material is filled between these unit enclosure steel plates A and the existing pillar, and the said existing pillar is reinforced.

The reinforcing structure shown in FIG. 6 is composed of four steel plate members b obtained by bending the unit-enclosed steel plate B at a right angle. That is, each steel plate member b superimposes the plate piece 6 of one steel plate member b on the plate piece 7 of another steel plate member b, and forms a unit-enclosed steel plate B having a quadrangular cross section with these four steel plate members b. It is composed.

Then, the unit-enclosed steel plate B is disposed around the existing pillar 8 with a predetermined interval as shown in FIG. 6, and a belt-like sheet (not shown) is pasted around the unit steel plate member. b is integrated. A grout material is filled between the unit-enclosed steel plate B and the existing pillar 8 in this way to reinforce the existing pillar 8.

JP 2013-181332 A

In the conventional reinforcing structure shown in FIG. 5 , since the laminated ribs 3 and 4 are provided on each unit-enclosed steel plate A, the laminated ribs 3 and 4 of the unit-enclosed steel plates A can be laminated while being overlapped. Therefore, there exists an advantage that workability | operativity when unit enclosure steel plate A is laminated | stacked improves.
However, since it is necessary to maintain an interval of at least the width of the laminated ribs 3 and 4 between the unit enclosure steel plate A and the column, the interval cannot be reduced. Therefore, there has been a problem that the amount of expensive grout material used is increased.

Further, in this type of reinforcing structure, a plurality of vertical bars for improving the shear strength of the column are arranged between the unit-enclosed steel plate A and the existing column along the longitudinal direction of the column.
However, when the vertical stripes are arranged in this way, the laminated ribs 3 and 4 are obstructed, and the arrangement space for the vertical stripes cannot be secured. When the vertical stripe cannot be arranged because the space is too small, the length of the diagonal line of the unit enclosure steel plate A must be increased by the amount of the laminated ribs 3 and 4. However, if the length of the diagonal line of the unit enclosure steel plate A is lengthened, the post-reinforcement pillar will be thickened accordingly. If the pillars become thicker, the size of the interior space of the building will also be substantially reduced.

  That is, the figure5The laminated ribs 3 and 4 in the conventional reinforcing structure shown in (1) play a large role from the viewpoint of workability when the unit-enclosed steel plates A are laminated. However, because of the above-mentioned laminated ribs 3 and 4, the amount of grout used increases and the post-reinforcement pillars become thick. From this point of view, the laminated ribs 3 and 4 are rather a negative factor. It has become. In particular, narrowing the internal space is not allowed, even for reinforcement. To that end, figure 5The conventional reinforcing structure shown in (1) was not compatible with the current situation.

On the other hand, in the conventional reinforcing structure shown in FIG. 6 , the thickness of the steel plate member b is very thin as 3 to 5 mm, and since the laminated ribs 3 and 4 are not provided like the steel plate member a of FIG. 5 , Even if the length of the diagonal line of the unit enclosure steel plate B is not lengthened, the space between the unit enclosure steel plate B and the existing pillar 8 can be sufficiently maintained, and a space for arranging a plurality of vertical bars there Is also secured. Therefore, the pillar after reinforcement does not become so thick.
However, as described above, since the thickness of the steel plate member b is thin, there is a problem that workability when the unit-enclosed steel plates B are stacked is somewhat inferior.

After all, the conventional reinforcing structures shown in FIGS. 5 and 6 have advantages and disadvantages, respectively, and their problems are in a trade-off relationship. That is, if importance is attached to the workability related to the lamination of unit-enclosed steel plates, it is difficult to secure a space for arranging the vertical bars, and if the laminated ribs are eliminated to secure the space for arranging the vertical bars, the workability concerning the lamination is poor. It was in the relationship of becoming.
An object of the present invention is to provide a reinforcing structure for an existing column in which the workability of laminating unit-enclosed steel plates is good and the reinforced column does not become thick even when vertical bars are arranged.

The present invention comprises a unit-enclosed steel plate by combining a plurality of steel plate members,
Stacked along a plurality of unit enclosure steel sheet in the longitudinal direction of the existing columns, and holds an interval between the unit enclosure steel with existing posts, but about the reinforcement structure of the existing columns for filling the grout material into the interval There is .

And it is a corner part of the unit enclosure steel plate, and it is inside from the lamination side of the enclosure steel plate concerned A vertical streak guide rib that protrudes horizontally toward the bottom is provided, and a concave portion is formed in the vertical streak guide rib. The vertical stripes are arranged by penetrating through the recesses.

thisAccording to the reinforcing structure of the invention, the vertical stripe guide rib is provided at the corner portion of the unit enclosure steel plate. At the same time, since the concave part is formed in this vertical stripe guide rib,When placing vertical bars,Up Only the amount of the concave part, Increase the diagonal length of the unit enclosure steel plateYou don't have to. Thus, since the length of the diagonal line of a unit enclosure steel plate does not need to be lengthened, even if a vertical streak is arrange | positioned, the post-reinforcement pillar will not become thicker than necessary. Therefore, the internal space is not reduced.

  Moreover, as for the longitudinal bar guide rib provided in the corner part of the unit enclosure steel plate, the surface of the rib can bear a part of the lamination surface of the said unit enclosure steel plate. Since the vertical streak guide rib functions as a laminated surface of the unit enclosure steel plate in this way, for example, even when the unit enclosure steel plate is configured using a thin steel plate of about 3 to 5 mm, the total area of the lamination surface increases, Therefore, the work efficiency of the stacking work does not drop.

In addition , since a pair of vertical bar guide ribs is provided between the corner portions of the unit-enclosed steel plate to secure a space for arranging vertical bars, the vertical bar guide ribs and the corner portions of the unit-enclosed steel plate are combined to make vertical bars. Play time guide function.

It is a perspective view of the principal part of 1st Embodiment. It is a top view of the principal part of 1st Embodiment. It is a perspective view of the principal part of 2nd Embodiment. It is a perspective view of the principal part of 3rd Embodiment. It is the one part perspective view which abbreviate | omitted the existing pillar which shows the conventional reinforcement structure. It is a partial perspective view which shows the other conventional reinforcement structure.

1 and 2 show a first embodiment, the overall configuration is the same as the conventional example of FIG. Therefore, the description of the reinforcing structure in FIG. 5 is used for the description of the first embodiment, and the detailed description of the entire structure is omitted. Further, the same components as those in FIG. 5 will be described with the same reference numerals.

In the first embodiment, a part of the laminated ribs 3 and 4 is cut off at the corner portion 9 of the unit enclosure steel plate A shown in FIGS. The muscle guide ribs 3a and 4a are used. Thus cut the part of the laminated ribs 3 and 4, parts a pair of longitudinal muscle guide ribs 3a therealong, with the 4a, the vertical line guide ribs 3 a, the enclosed portion to 4a, the longitudinal muscle 10 It is set as the recessed part which penetrates. By setting the portion surrounded by the vertical stripe guide ribs 3a and 4a as a concave portion, a space for arranging the vertical stripe 10 in the corner portion 9 is secured.

  And it was ensured by the pair of vertical stripe guide ribs 3a and 4a.RecessIn addition, the vertical muscle 10 To penetrate.Therefore, figure5As in the conventional reinforcing structure shown in (1), the vertical bars 10 need not be arranged further inside than the laminated ribs 3 and 4. In other words,As much as the recessSince the longitudinal bars 10 can be arranged closer to the plate pieces 1 and 2 than the laminated ribs 3 and 4, the diagonal lines of the unit-enclosed steel plate A are used to arrange the longitudinal bars 10.The length oflongYou don't have to.

Moreover, since the laminated ribs 3 and 4 can be left as they are, the advantages of the laminated ribs 3 and 4, that is, good workability in the laminating work of the unit enclosure steel plates A can be utilized as they are.
Thus, according to the reinforcement structure of 1st Embodiment, it can prevent that the existing pillar 8 after reinforcement | strengthening becomes thick more than necessary, maintaining the workability | operativity of the lamination | stacking operation | work of the unit enclosure steel plate A. FIG.
In the first embodiment, a belt-like sheet (not shown) is wound around the laminated unit-enclosed steel plates A to integrate the four steel plate members a.

Moreover, in the said 1st Embodiment, while providing the laminated ribs 3 and 4 over the perimeter of the unit enclosure steel plate A, while forming the notch part 3b, 4b in the corner part 9, this notch part 3b, 4b portion of the above vertical line guide ribs 3a around the enclosed part in 4a has a concave portion. Then, the vertical bars are passed through the recesses surrounded by the vertical bar guide ribs 3a and 4a . Thus, while leaving the laminated ribs 3 and 4 over the entire circumference, the vertical bars 10 are passed through the recesses, so even if the vertical bars 10 are arranged , the diagonal lines of the unit-enclosed steel plate are equivalent to the recesses. It is not necessary to lengthen the length.

Figure 3 is a perspective view of a main part showing a second embodiment, the overall configuration is the same as the conventional example of FIG. Accordingly, the description of the reinforcing structure in FIG. 6 is incorporated in the description of the second embodiment, and the detailed description thereof is omitted. Further, the same components as those in FIG. 6 will be described with the same reference numerals.

In the second embodiment, vertical bar guide ribs 13 are provided at the corner portions 11 of the unit enclosure steel plate B shown in FIG. 3 , and the vertical bar guide ribs 13 are formed integrally with the plate piece 7 of the steel plate member b. And it is bent almost horizontally toward the inside of the unit-enclosed steel plate B.

As is apparent from FIG. 3 , the vertical stripe guide rib 13 as described above has a substantially isosceles triangular plane shape, and two concave portions 13a and 13b are formed at the bottom thereof, and these concave portions 13a and 13b are formed. Each of these is penetrated by a vertical line not shown. Therefore , even if the vertical bars 10 are arranged, it is not necessary to increase the length of the diagonal line of the unit-enclosed steel plate by the amount of the recesses 13a and 13b .

Moreover, the plurality of recesses 13a, since the vertical line pass through the respective 13b, be arranged vertical line a plurality of the narrow portion of the corner portion 11 of the unit enclosure steel sheet B, and inclined their longitudinal muscle between There will be no interference.

Moreover, in this 2nd Embodiment , the workability at the time of laminating | stacking the unit steel plate B by this vertical bar guide rib 13 is improved by providing the vertical bar guide rib 13 in the said corner part 11. FIG. Therefore, even if it is the unit enclosure steel plate B using a thin steel plate, the workability | operativity of the lamination operation is not impaired.

Figure 4 is a perspective view of a main part showing a third embodiment, the overall configuration is the same as the conventional example of FIG. Therefore, the description of the reinforcing structure in FIG. 6 is used for the description of the third embodiment, and the detailed description thereof is omitted. Further, the same components as those in FIG. 6 will be described with the same reference numerals.

In the third embodiment, vertical bar guide ribs 14 are provided at the corner portions 11 of the unit enclosure steel plate B shown in FIG. 4 , and the vertical bar guide ribs 14 are composed of a pair of rib portions 14a and 14b. Similarly to the second embodiment, the portions 14a and 14b are formed integrally with the plate pieces 6 and 7 of the steel plate member b, and are bent substantially horizontally toward the inside of the unit-enclosed steel plate B.
When the plate pieces 6 and 7 of the steel plate member b are bent at a right angle, the pair of rib portions 14a and 14b are attached to each other so as to constitute a single longitudinal bar guide rib 14.

Recesses 15 and 16 are formed in each of the rib portions 14a and 14b of the longitudinal bar guide rib 14 as described above, and the plate pieces 6 and 7 of the steel plate member b are bent at right angles as described above, so that the pair of ribs When the portions 14a and 14b are brought together, the recesses 15 and 16 are combined to form a hole. In the hole formed in this way, the vertical bars 10 are penetrated as shown in the figure. Therefore, it is not necessary to increase the length of the diagonal line of the unit-enclosed steel plate by the amount of the concave portion constituting the hole .

Also in the third embodiment, the vertical streak guide rib 14 is provided in the corner portion 11, thereby improving workability when the vertical streak guide rib 14 stacks the unit-enclosed steel plates B. Therefore, even if it is the unit enclosure steel plate B using a thin steel plate, the workability | operativity of the lamination operation is not impaired.

In the above first embodiment, a vertical stripe rib 3a a part of the laminated ribs 3,4, although the 4a, for example, the steel plate member b of the unit enclosure steel sheet B shown in FIG. 6, a pair of vertical line guide ribs You may make it provide the vertical stripe guide rib corresponded to 3a, 4a. In other words, it is a structure in which the length of the laminated ribs 3 and 4 in FIG. Even if the longitudinal bar guide ribs having such a short length are provided in pairs at the corner portion 9, the workability in the case where the vertical bar guide ribs stack the unit steel plates is improved. .
Furthermore, the vertical stripe guide ribs require the recesses in each embodiment. By forming the recesses in this way, it is not necessary to increase the length of the diagonal line of the unit-enclosed steel plate by the amount of the recesses .

Moreover, also in each said embodiment, filling a grout material between an existing pillar and a unit enclosure steel plate is the same as the past.
Further, in each of the above embodiments, each of the vertical stripe guide ribs 12, 13, and 14 is integrated with the plate pieces 6 and 7, and is bent. However, the vertical stripe guide rib is formed of an independent plate, It may be integrated with the plate pieces 6 and 7 by welding or the like.

  It is optimal for a reinforcing structure in which unit-enclosed steel plates are laminated along the longitudinal direction of the existing columns and the grout material is filled between the unit-enclosed steel plates and the existing columns.

A, B Unit enclosure steel plates a, b Steel plate members 3a, 4a Longitudinal guide ribs 8 Existing columns 9, 11 Corner portions 10 Vertical stripes 12 Vertical stripe guide ribs 13 Vertical stripe guide ribs 14 Vertical stripe guide ribs 12a Concavities 13a Concavities 13b Concavities

Claims (1)

While configuring a unit-enclosed steel plate by combining multiple steel plate members,
Laminating a plurality of unit-enclosed steel plates along the longitudinal direction of the existing pillars,
In the reinforcement structure of the existing pillar that holds the gap between the unit enclosure steel plate and the existing pillar and fills the gap with the grout material,
A vertical bar guide rib that protrudes inward from the laminated surface of the unit steel sheet is provided at a corner portion of the unit steel sheet, and a recess is formed in the vertical bar guide rib. The recess of the vertical bar guide rib is penetrated. reinforcing structure of the existing columns to the structure so arranging the longitudinal muscle is.

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