JP2009155870A - Reinforced structure - Google Patents

Abstract

The present invention provides a reinforcing structure that is excellent in workability and can be constructed at low cost.
A reinforcing structure 1 integrally constructs a pair of reinforced concrete sleeve walls 20 and 20 on both sides of a pillar 10 of an existing building, and one surface of the pillar 10 and one surface of the sleeve walls 20 and 20 are collectively formed. And a steel face member 30 functioning as a structural horizontal member, and rib members 34, 34,... Embedded in the concrete of the sleeve wall 20 are vertically and horizontally arranged on one side of the steel face member 30. The column 10 is constrained to the sleeve wall 20 by the displacement resistance of the rib member 34 and the tensile resistance of the steel face member 30.
[Selection] Figure 2

Description

  The present invention relates to a reinforcing structure for an existing structure.

  For existing reinforced concrete structures, additional walls may be constructed and reinforced.

  Conventionally, as shown in FIG. 7 (a), such an extension wall 101 is provided with reinforcing bars and anchors 130 in a state where a sufficient fixing length is secured by drilling an existing frame 110 such as a column or a beam. In general, the reinforcing bar is constructed of a reinforced concrete wall 120 that is integrated with an existing frame 110 using the reinforcing bar or anchor 130.

  However, since the conventional extension wall 101 concentrates deformation on the wall legs, it is necessary to reinforce the legs.

  Therefore, in Patent Document 1, as shown in FIG. 7 (b), the existing pillar 210 and the wall 220 connected to the side surface of the existing pillar 210 are sandwiched integrally by the steel plates 230, 230 from the front and rear, and the PC steel. Disclosed is a reinforcing wall 201 that applies a binding force by the bars 240, 240,... To prevent the steel plates 230, 230 and the wall 220 from being integrated with each other and resisting shearing force, and preventing deformation from concentrating on the legs. Has been.

  In Patent Document 2, as shown in FIG. 7 (c), a pair of steel plates 330, 330 having a plurality of stud bolts 310, 310,. A steel plate concrete wall 301 is disclosed which is arranged in a state where the concrete 320 is placed between the pair of steel plates 330 and 330. Such a steel plate concrete wall (reinforcing wall) 301 also resists the shearing force by integrating the steel plates 330 and 330 and the concrete 320 and prevents the deformation from concentrating on the legs.

JP 2003-227236 A JP 2000-170285 A

However, since the conventional reinforcing walls 201 and 301 are sandwiched between the two steel plates 230 and 230 (330 and 330), there is a problem that the amount of steel is large and the cost is increased.
Further, when the shear strength is increased by increasing the member thickness of the steel plates 230 and 330, it becomes difficult to handle the steel plates, which may affect the workability.

  Further, in the reinforcing method in which the pillar 210 and the wall 220 are integrally sandwiched by the steel plates 230 and 230, since there are a plurality of entrance corners and exit corners at the joint portion between the pillar 210 and the wall 220, the steel plate 230 is in close contact with the housing. It took time and effort to process.

  An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a reinforcing structure that is excellent in workability and can be constructed at low cost.

  In order to solve the above problems, a reinforcing structure according to a first aspect of the present invention is a reinforcing structure in which a pair of reinforced concrete sleeve walls are integrally constructed on both sides of a pillar of an existing building. One side of the wall is provided with a steel surface material that functions as a structural horizontal member, and a rib material embedded in the concrete of the sleeve wall stands vertically and horizontally on one side of the steel surface material. The column is constrained by the sleeve wall by the displacement resistance of the rib material and the tensile resistance of the steel surface material.

  The reinforcing structure of the second invention is a reinforcing structure comprising a column beam frame of an existing building, a column beam frame of an existing building, and a reinforced concrete reinforcing wall formed inside the column beam frame. The reinforcing wall includes a wall main body and a steel surface material covering one surface of the wall main body, and rib materials are erected vertically and horizontally on one side of the steel surface material, The rib material is embedded in the concrete of the wall main body, so that a seismic resistant wall in which the wall main body and the steel surface material are integrated is formed.

  According to such a reinforcing structure, since the steel surface material is reinforced by the rib material, the weight of the steel surface material can be reduced. Therefore, workability is improved by facilitating the handling of the steel face material. In addition, the steel material can be reduced by reducing the weight of the steel surface material, and the material cost can be reduced.

Moreover, since such a reinforcing structure does not require drilling or the like in an existing housing, noise and dust are not generated, and can be suitably employed for reinforcing a structure in service.
In addition, the steel surface material has a function as a horizontal structural member that works together with the column to resist shearing, which makes it possible to omit anchor bars, making it economical and excellent in workability. .
Here, the structural horizontal member has a function as a structural material such as a column, a horizontal bar arranged in a wall, or a steel plate so as to bear a shearing force during an earthquake or the like.

  Further, in the reinforcing structure according to the first invention, the steel plate portion of the steel surface material (structural horizontal member) is integrated (anchored) with the column, thereby fulfilling the function of the horizontal wall and increasing the rigidity of the column. Can be increased.

  In the reinforcing structure, the steel surface material may be a unit mold formed by combining a plurality of divided panels. In addition, ribs are erected on the peripheral edge of one side of the split panel at locations corresponding to the other split panels. By combining the peripheral ribs, the split panels are combined to form a steel surface material (unit formwork ) May be configured.

  As described above, according to the reinforcing structure of the present invention, it is possible to construct with excellent workability and at low cost.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.

<First Embodiment>
In the first embodiment, as shown in FIG. 1, a pillar 10 of an existing building B and a pair of reinforced concrete structure sleeve walls 20, 20 formed on both sides of the pillar 10 are integrally constructed. The reinforcing structure 1 will be described.

  As shown in FIG. 2, the reinforcing structure 1 according to this embodiment is a steel that collectively covers one surface of a column 10 and one surface of a pair of sleeve walls 20, 20 formed across the column 10. The pillar 10 and the sleeve walls 20 and 20 are integrated with each other by the surface material 30.

As shown in FIG. 1, the sleeve wall 20 is a reinforced concrete member formed in the inner space of the column beam frame formed by the left and right columns 10 and the upper and lower beams 11, and the interval between the upper and lower beams 11, 11. The width (the length of the lateral wall) is less than half the distance between the columns 10 (the lateral length of the column beam frame).
Further, as shown in FIGS. 2 and 3B, the wall thickness of the sleeve wall 20 is formed to be about half of the thickness (depth width) of the column 10.

  In addition, the shape dimension of the sleeve wall 20 is not limited to the said shape, It is possible to set suitably.

  As shown in FIG. 3A, the steel face member 30 is a unit mold formed in a shape that integrally covers the pillar 10 and the sleeve walls 20, 20 by combining a plurality of divided panels 31, 32. It is comprised by.

  As shown in FIGS. 3A and 3B, the divided panels 31 and 32 are formed in a shape corresponding to the left and right sleeve walls 20 by being combined on one side of the pillar 10.

  In the present embodiment, as shown in FIGS. 3 and 4, the divided panels 31 and 32 constituting the steel surface material 30 are divided into types of divided panels (hereinafter, “ There are two types: 31, which is sometimes referred to as “normal panel”, and 31, which is a split panel (hereinafter also referred to as “column panel”) 32, which is disposed across the pillar 10 and the sleeve walls 20, 20. is there.

  As shown in FIG. 4A, the normal panel 31 includes a steel plate 33 and vertical and horizontal rib members 34 formed on the surface (one side) of the steel plate 33 that contacts the sleeve wall 20.

  The steel plate 33 is a steel plate formed in a rectangular shape, and the plate thickness can be appropriately set according to the assumed stress acting on the reinforcing structure 1. In addition, the shape and size of the steel plate 33 is appropriately set according to the shape of the pillar 10, the shape of the sleeve wall 20, and the like.

  The rib member 34 is made of a steel plate material, and is integrally fixed in a state of being erected on one surface of the steel plate 33. The formation of the rib member 34 is not limited to the case of forming the plate member by fixing the plate member, and the steel plate 33 and the rib member 34 may be formed by using a steel surface member formed in advance integrally. Good.

A plurality of rib members 34 are combined to form lattice-like convex portions on the surface of the divided panel 31.
Further, in the rib member 34, a peripheral rib 34a formed on the peripheral edge of the steel plate 33 is formed with a through-hole 34c for connecting with other adjacent divided panels 31 and 32 at a predetermined interval.

  The height dimension of the rib member 34 (the width dimension of the plate member) is about 1/8 to 1/2 of the wall thickness of the sleeve wall 20, as shown in FIGS. 2 and 3B (in this embodiment). (About 1/4). The shape dimensions and arrangement intervals of the rib members 34 are not limited, and can be set as appropriate.

  In the present embodiment, ribs 34 and 34 (peripheral ribs 34 a and 34 a) are formed by bending the sides of a rectangular steel plate and processed into a substantially U-shaped cross section, and a lattice is formed between these ribs 34 and 34. The regular panel 31 is formed by forming the ribs 34b. In addition, the formation method of the normal panel 31 is not limited.

As shown in FIG. 4A, the normal panel 31 is provided with rib members 34 over the entire surface of the steel plate 33 on the side in contact with the sleeve wall 20.
The normal panel 31 according to the present embodiment has a length equivalent to the height of the sleeve wall 20.

The column part panel 32 has the same configuration as that of the normal panel 31 except that the rib member 34 in the middle in the longitudinal direction is omitted and a recess 34d having the same width as the column 10 is formed. In the present embodiment, the rib 34 is disposed along the side surface of the column 10 in the recess 34d. However, the shape dimension of the recess 34d is not limited to this, and can be set as appropriate. .
The column panel 32 has a length equivalent to that of the normal panel 31 and is formed to have a width that is 1/5 of the height of the sleeve wall 20.

  As shown in FIG. 3A, the column panel 32 is disposed across the left and right sleeve walls 20, 20 and the column 10 with the recess 34 d engaged with the column 10. A part of the steel face member 30 is formed by stacking five columnar panels 32. In the present embodiment, the columnar panels 32 having the same shape are stacked, but the columnar panels 32, 32... Having different shapes (for example, width dimensions) may be combined.

  As shown in FIG. 3A, the normal panels 31 and 31 are disposed at both ends of the column panel 32, and the column 10 and the sleeve are formed by the column panels 32, 32,. It is formed in a shape that covers one surface of the walls 20 and 20. In the present embodiment, the normal panels 31 and 31 having the same shape and size are used, but those having different shapes (for example, width sizes) may be used.

The connection between the divided panels is a mounting bracket such as a U-shaped pin that penetrates the through holes 34c, 34c formed in the peripheral ribs 34a, 34a in a state where the peripheral ribs 34a of the adjacent divided panels are overlapped with each other. (The illustration is omitted).
In addition, the connection method of the division panels 31 and 32 is not limited, What is necessary is just to select from a well-known method suitably.

As shown in FIGS. 2 and 3B, the sleeve wall 20 and the steel surface material 30 are integrated by embedding the rib material 34 in the sleeve wall 20 made of reinforced concrete. Further, since the steel face material 30 is formed so as to integrally cover the left and right sleeve walls 20, 20 and the pillar 10, with the integration of the sleeve wall 20 and the steel face material 30, the pillar 10 and Integration with the sleeve wall 20 is performed.
Thereby, the integrally formed reinforcing structure 1 is configured.

Next, the construction method of the reinforcing structure 1 according to this embodiment will be described.
In the reinforcing structure 1, first, the surface corresponding to the peripheral surface of the sleeve wall 20 of the column 10 and the beam 11 is subjected to shot blasting, and then expanded concrete is placed to form a contour joint surface.

  Next, after reinforcing bars (not shown) necessary for the sleeve wall 20 are arranged, as shown in FIG. 5, the steel face material 30 is disposed on one surface side of the column 10, and the steel face material 30. The mold 40 is disposed at a predetermined interval so as to face the. At this time, a gap formed between the steel face member 30 and the column beam frame is also covered with the mold 41.

  Then, by placing concrete in the space surrounded by the steel face material 30 and the molds 40 and 41, the sleeve wall 20 in a state where the rib material 34 of the steel face material 30 is embedded is formed. (See FIG. 3B). When the concrete curing is finished, the molds 40 and 41 are removed.

  As mentioned above, according to the reinforcement structure 1 concerning this embodiment, the steel surface material 30 serves as the steel horizontal form frame for concrete placement, and the structural horizontal member which carries out shear resistance in cooperation with a pillar. Therefore, it is not necessary to install anchors on the formwork and the column beam frame in the conventional seismic reinforcement method, and it is possible to reduce costs and work periods by omitting the labor and material costs.

  In addition, since the pillar 10 and the sleeve walls 20 and 20 can be integrated without requiring an anchor, there is no generation of noise or dust associated with the construction of the anchor, so it can be applied to buildings in service. It is. In other words, the rib member 34 of the steel face member 30 is embedded in the sleeve wall 20, so that the pillar 10 is connected to the sleeve wall 20, due to the resistance to slippage of the rib member 34 and the tensile resistance of the steel face member 30. It is restrained by 20 and integration is made.

Further, since the steel face member 30 is integrated with the reinforced concrete sleeve wall 20, a compression strut is formed so that the entire reinforcing structure 1 is shear-resisted as a whole. Therefore, the shear strength increases dramatically.
In addition, because the steel face material 30 is reinforced, deformation does not concentrate on the legs of the additional wall (sleeve wall 20), and the toughness and energy absorption capacity compared to the conventional reinforcing wall structure. Is excellent.

By integrating the steel plate 33 of the steel face member 30 with the column 10, the steel face member 30 can function as a transverse wall, and the rigidity of the column 10 can be increased.
Reinforcement that controls the shear strength required for each existing building B and its dust performance because the thickness of the steel face plate 30 and the wall thickness and wall width of the extension wall (sleeve wall 20) can be set as appropriate. Structure 1 can be constructed.

  Since the sleeve wall 20 is formed in the inner space of the column beam frame, the outer wall and the effective floor area are reinforced with little change even when the existing building B is in service, which is preferable. .

  Since the steel face material 30 also functions as a steel formwork, it is possible to reduce the use of formwork made of veneer boards and the like, and contribute to waste reduction and forest protection. .

By constructing the steel surface material 30 by combining the divided panels 31 and 32, the steel surface material 30 can be easily handled during construction, and the workability of the reinforcing structure 1 is improved. Further, the conveyance of the members (divided panels 31 and 32) is easy.
Furthermore, since the steel face material 30 is assembled using the peripheral ribs formed on the peripheral edges of the divided panels 31 and 32, it can be easily performed and the workability is excellent.

Therefore, according to the reinforcing structure 1, since it is possible to reinforce the building without changing the appearance of the building, the reinforcing structure 1 can be suitably applied to an existing building that requires aesthetic considerations.
Moreover, the view from the external opening part of the existing building and lighting can be maintained, the surface area of the opening part is hardly reduced, and the indoor floor area is not reduced.

<Second Embodiment>
In the second embodiment, as shown in FIG. 1, a reinforcing structure 2 including a column beam frame of an existing building B and a reinforced concrete reinforcing wall 50 formed in an inner space of the column beam frame will be described. .

  As shown in FIGS. 6A and 6B, the reinforcing structure 2 according to the present embodiment includes a column beam frame formed by left and right columns 10 and 10 and upper and lower beams 11 and 11, and the column beam frame. It is a seismic wall formed by integrally forming a wall body 51 formed in the inner space of the wall and a reinforcing wall 50 made of a steel surface material 52 covering one surface of the wall body 51.

  As shown in FIG. 1, the wall main body 51 is a reinforced concrete member formed so as to shield the inner space of the column beam frame formed by the left and right columns 10 and 10 and the upper and lower beams 11 and 11. In this embodiment, as shown in FIG. 6B, the wall thickness of the wall body 51 is formed to be about half of the thickness (width of depth) of the column 10, but the thickness dimension of the wall body 51 is limited. It is not something.

  As shown in FIG. 6A, the steel surface material 52 is a unit mold frame that is a combination of a plurality of divided panels 53, 53, and is formed in a shape that covers the surface of the wall body 51. In the present embodiment, the steel face material 52 is formed by combining the four divided panels 53, 53,... In the vertical direction, but the number and method of combining the divided panels 53 are not limited. , As appropriate.

In the present embodiment, the divided panel 53 constituting the steel surface material 52 is similar to the normal panel 31 shown in the first embodiment, and is a surface on the side in contact with the wall body 51 of the steel plate ( It is comprised by the vertical and horizontal rib material 54 formed in the single side | surface (refer Fig.4 (a)).
The configuration of the division panel 53 is the same as the configuration of the normal panel 31 shown in the first embodiment, and detailed description thereof is omitted. Moreover, since the connection method of the division panels 53 is the same as the content shown in 1st Embodiment, detailed description is abbreviate | omitted.

  As shown in FIG. 6B, the wall main body 51 and the steel surface material 52 are integrated into the wall main body 51 and the steel surface material 52 by embedding the rib material 54 in the wall main body 51 made of reinforced concrete. A seismic wall is formed.

Next, the construction method of the reinforcing structure 2 according to this embodiment will be described.
In the reinforcing structure 2, first, the surfaces of the columns 10 and 10 and the beams 11 and 11 are subjected to shot blasting, and then expanded concrete is placed to form a contour joint surface.

Next, as shown in FIG. 5 and FIG. 6 (a), the steel surface material 52 is disposed in the inner space of the column beam frame, and at a predetermined interval so as to face the steel surface material 52. The mold 40 is opened. At this time, the gap formed between the steel face member 52 and the column beam frame is also covered with the mold 41.
At this time, the surface of the steel surface material 52 is disposed so as to be flush with one surface of the column 10.

  Then, by placing concrete in a space surrounded by the steel surface material 52 and the molds 40 and 41, the reinforcing wall 50 in a state where the rib material 54 of the steel surface material 52 is embedded is formed. (See FIG. 6B). When the concrete curing is finished, the molds 40 and 41 are removed.

  As described above, according to the reinforcing structure 2 according to the present embodiment, the steel face material 52 serves as both a steel formwork frame and a structural horizontal member. Therefore, the anchor to the column beam frame in the conventional seismic reinforcement method is used. Construction is not necessary, and it is possible to reduce costs and construction periods by omitting the labor and material costs.

Further, since the steel face material 52 is integrated with the wall body 51 made of reinforced concrete, a compression strut is formed in which the entire reinforcing structure 2 is shear-resisted as a whole, so that the shear strength is dramatically increased. Increase.
Further, since the reinforcement is made by the steel face material 52, the deformation is not concentrated on the leg portion of the reinforcing wall 50 (seismic wall), and the toughness and the energy absorbing ability are higher than those of the conventional seismic wall. Are better.

  Since the wall thickness of the wall main body 51 and the thickness of the steel surface material 52 can be set as appropriate, the reinforcing structure 2 that controls the shear strength necessary for each existing building B and its dust performance is configured. It is possible.

  Since the reinforcement wall 50 is formed in the inner space of the column beam frame, the reinforcement is made with almost no change in the appearance and effective floor area even when the existing building B is in service. .

  In addition, since the effect of the reinforcing structure 2 according to the second embodiment is the same as that of the reinforcing structure 1 according to the first embodiment, detailed description thereof is omitted.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and it goes without saying that the above-described constituent elements can be appropriately changed in design without departing from the spirit of the present invention.
For example, in each of the above embodiments, the steel surface material is configured by combining a split panel (steel formwork). However, a steel surface material such as a member formed in a predetermined shape in advance is used. The configuration of is not limited.

The schematic diagram which shows the outline of the reinforcement structure which concerns on suitable embodiment of this invention. It is a perspective view which shows the reinforcement structure which concerns on 1st Embodiment. (A) is a front view which shows the steel surface material of the reinforcement structure shown in FIG. 2, (b) is sectional drawing of the reinforcement structure shown in FIG. (A) And (b) is a perspective view which shows the division | segmentation panel which comprises the steel surface material of the reinforcement structure which concerns on suitable embodiment of this invention. It is a perspective view which shows the construction condition of the reinforcement structure which concerns on suitable embodiment of this invention. It is a figure which shows the reinforcement structure which concerns on 2nd Embodiment, (a) is a front view, (b) is sectional drawing. (A)-(c) is sectional drawing which shows the conventional reinforcement structure.

Explanation of symbols

1, 2 Reinforcement structure 10 Column 11 Beam 20 Sleeve wall 21, 50 Reinforcement wall 30, 52 Steel face material 31 Normal panel (split panel)
32 Column panel (split panel)
33 Steel plate 34, 54 Rib material 34a Peripheral rib 34b Grid-like rib 34c Through-hole 34d Recess 40, 41 Form 51 Wall body 53 Divided panel B Existing building

Claims (3)

It is a reinforcing structure that integrally constructs a pair of reinforced concrete sleeve walls on both sides of a pillar of an existing building,
Covering one side of the pillar and one side of the sleeve wall together, comprising a steel surface material that functions as a structural horizontal member,
On one side of the steel surface material, rib materials embedded in the concrete of the sleeve wall are erected vertically and horizontally,
The reinforcing structure is characterized in that the column is constrained to the sleeve wall by a displacement resistance of the rib material and a tensile resistance of the steel surface material. A reinforcing structure comprising a column beam frame of an existing building, and a reinforced concrete reinforcing wall formed inside the column beam frame,
The reinforcing wall includes a wall main body and a steel surface covering one surface of the wall main body;
On one side of the steel surface material, rib materials are erected vertically and horizontally,
A reinforcing structure characterized in that a seismic wall in which the wall body and the steel surface material are integrated is formed by embedding the rib material in the concrete of the wall body.   The reinforcing structure according to claim 1, wherein the steel surface material is a unit mold formed by combining a plurality of divided panels.

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