JP3941053B2 - Seismic wall and method for constructing seismic wall structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a seismic wall structure that includes a seismic wall that improves workability and a pair of pillars arranged on both sides of the seismic wall and the seismic wall.
[0002]
[Prior art]
Conventionally, when constructing structures with high-rise or super-high-rise reinforced concrete structures and equipped with earthquake-resistant walls, frame construction on each floor has been carried out for the purpose of high diversion of concrete formwork (parts V, vertical parts such as columns and walls) and H A so-called VH separation driving method is generally applied which is divided into parts (horizontal parts such as slabs). However, in such a construction method, since the wall beam is built integrally on the upper part of the earthquake-resistant wall, the installation height of the wall beam and the large beam is almost the same. In the panel zone of the steel beam and the large beam, it interferes with the assembly of the large beam rebars constituting the large beam forming the H part performed after placing the concrete wall on the seismic wall forming the V part and the column.
In order to cope with such a phenomenon, for example, in Patent Document 1, the earthquake-resistant wall between the columns is constructed up to the wall beam and the main beam of the wall beam is inserted into the column. A configuration has been devised in which the lower bar of the placed large beam is arranged to bend in front of the center line of the column across the fixing portion of the main bar constituting the wall beam.
[0003]
[Patent Document 1]
JP-A-6-42037 (see FIG. 4)
[0004]
[Problems to be solved by the invention]
However, in the configuration described above, the anchoring part of the main bar constituting the wall beam remains in the panel zone of the column and the large beam, which prevents the concrete from being smoothly placed when placing concrete on the earthquake resistant wall and column. There are many cases. In addition, because the anchoring part of the wall reinforcement that constitutes the earthquake-resistant wall is also present in the panel zone of the column and the large beam, it interferes with the assembly of the beam reinforcement that constitutes the large beam after the concrete is placed on the earthquake-resistant wall and the column. Will be.
[0005]
In view of the above circumstances, an object of the present invention is to provide a seismic wall having a simple configuration and good workability, and a method for constructing a seismic wall structure.
[0006]
[Means for Solving the Problems]
The seismic wall according to claim 1 is a seismic wall provided in a structure of a rigid frame structure including a reinforced concrete column and a large beam, and arranged so as to cross the large beam and connect the paired columns. In addition, a rough concrete surface is provided on each of both side end faces of the earthquake-resistant wall at a height position that forms a panel zone between the pillar and the girder, and the pillars provided in the earthquake-resistant wall are paired with each other. The wall beam to be connected is arranged at a height position below the panel zone of the column and the large beam.
[0007]
The method for constructing a seismic wall structure according to claim 2 is disposed on both sides of the seismic wall having a height from the upper surface of the floor slab to the lower surface of the floor slab on the upper floor, and compared with the seismic wall. A plurality of columns arranged in parallel with a predetermined separation distance, comprising a pair of columns having a low height , a wall beam provided at the upper part of the earthquake-resistant wall and connecting the upper ends of the columns forming a pair . A seismic wall structure and a beam that extends from the top of the pillar to the bottom surface of the floor slab on the upper floor, is arranged so as to intersect the seismic wall, and is joined to the pillar via a panel zone. A method for constructing a seismic wall structure for a structure comprising a large beam connecting upper portions of opposing columns of adjacent seismic wall structures, wherein the seismic wall structure is configured on an upper surface of a floor slab A structural bar arrangement unit for The structural bar arrangement unit includes a column bar for forming the column, a wall bar for forming the earthquake-resistant wall, and a wall beam bar incorporated in the wall bar, and the structure bar arrangement unit. After placing the concrete formwork so as to surround the concrete, the concrete is placed in the formwork to the top end level of the pillar, thereby forming the pillar excluding the panel zone and embedding the wall beam reinforcement. And the step of forming the earthquake-resistant wall up to a height that leaves the upper edge portion is sequentially performed for each of the plurality of structural bar arrangement units arranged on the upper surface of the floor slab, and after hardening the concrete placed in the step , For each of the plurality of structural bar arrangement units , concrete is again cast to form the entire seismic wall up to the lower surface level of the floor slab on the upper floor , and then the large beam is constructed to construct the large beam and the Pillar and the panel It is characterized by joining via the over down.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The seismic wall and the construction method of the seismic wall structure according to the present invention are arranged such that the wall beam included in the seismic wall is disposed below the panel zone of the column, and is engaged with the panel zones of the columns on both side end surfaces of the seismic wall. The part is formed with a rough concrete surface for the purpose of integrating the seismic wall and the girder without projecting commonly used reinforcing bars, etc., so that the columns and girder are arranged in the panel zone. While simplifying a line | wire, the workability | operativity of the earthquake-resistant wall structure which consists of a pillar which makes the earthquake-resistant wall and the both sides of this earthquake-resistant wall was provided is improved.
[0009]
As shown in FIG. 1, a structure 1 composed of a rigid frame composed of a reinforced concrete column 2 and a girder 4 is arranged so as to connect a pair of columns 2 in a direction intersecting with the girder 4. A seismic wall 6 is provided.
The pair of columns 2 located on both side surfaces of the seismic wall 6 is made of reinforced concrete in which the column reinforcement 3 composed of the column main reinforcement 3a and the strip reinforcement 3b is embedded in the concrete 16, and is disposed on the upper surface of the floor slab 18. . The height is lower than the earthquake-resistant wall 6, and the height at which the girder 4 having a desired beam size can be disposed between the top end of the column 2 and the lower surface of the floor slab (not shown). Has been built.
[0010]
On the other hand, the seismic wall 6 effectively resists the horizontal load at the time of the earthquake and reduces the load of the horizontal force on the column 2 and the large beam 4. The height reaches the lower surface of the floor slab. Such a seismic wall 6 is made of reinforced concrete as in the case of the pillar 2 and the large beam 4, and the wall bars 7 constituting the seismic wall 6 are arranged with the horizontal wall bars 8 and the vertical wall bars 9 in a mesh shape. The straight mesh unit 7 a is configured by arranging a pair of parallel meshes with a predetermined spacing, and is embedded in the concrete 16.
As shown in FIG. 2, the column connecting bars 19 are provided with fixing means so as to protrude inward of the columns 2 at the end portions of the horizontal wall bars 8 arranged at a height position adjacent to the columns 2. It is fixed through.
Further, as shown in FIG. 1, as shown in FIG. 1, jointing reinforcing bars generally used for joint portions are provided at both end surfaces of the earthquake-resistant wall 6 at a height position adjacent to the panel zone 17 with the girder 4 above the top end of the column 2. A rough concrete surface 6a is formed for the purpose of improving the joint strength with the reinforced concrete girder 4 without protruding the like. The rough concrete surface 6a is formed with a rough surface that improves the fixing of concrete on the surface, such as a structure using a rough surface forming mold at the time of placing concrete or a structure in which a so-called cotter is provided after the concrete is hardened. Any means may be used as long as it is configured.
[0011]
By the way, as shown in FIG. 1, the seismic wall 6 is provided with a wall beam 11 for connecting the paired columns 2 at a height position below the panel zone 17 above the columns 2. Therefore, as shown in FIG. 2, a plurality of wall beam main bars 12a and a plurality of wall beam main bars 12a are provided below the top end of the column 2 forming the pair of mesh units 7a and at the height of the intermediate portion. A plurality of stirrups 12b arranged so as to intersect and contain these are integrally disposed, and by arranging the mesh units 7a in parallel with a predetermined separation interval, A wall beam 12 that constitutes the wall beam 11 is formed on the wall beam 7. In the present embodiment, the height position of the wall beam 12 is arranged in the vicinity of the upper part of the paired pillars 2, but is not necessarily limited to this, and is lower than the top end of the pillars 2. As long as it is, it is good also as a structure provided in any height position.
[0012]
The column 2 which is paired with the earthquake-resistant wall 6 having the above-described configuration is provided with a column connecting bar 19 which is arranged so as to straddle the joint portion between the two and embedded in the concrete 16 and inside the wall bar 7. The seismic wall structure in which the wall beam main bar 12a of the wall beam 12 is also integrated by embedding in the concrete 16 with the end part protruding inward of the column 2 and becomes a V part (vertical part of the frame). The body 13 will be constructed.
In the embodiment of the present invention, the seismic wall 6 is used as a door wall of the structure 1 used as an apartment house, and the seismic wall structure 13 is provided for each level of the structure 1. A plurality are provided in parallel with a predetermined separation interval. The adjacent seismic wall structures 13 are connected to each other by a large beam 4 laid over the upper portions of the columns 2 facing each other. As described above, the girder 4 is arranged on the upper surface of the column 2 so as to intersect the seismic wall 6, and the girder 4 made of reinforced concrete is formed on the rough concrete surface 6 a formed on both sides of the seismic wall 6. The seismic wall 6 and the girder 4 can be integrated by sufficiently fixing the concrete.
[0013]
In this way, the seismic wall 6 protrudes the horizontal beam 8 of the wall bar 7 and the main beam 12a of the wall beam 12 to the panel zone 17 positioned above the top end of the column 2 on both sides thereof. Therefore, there is no obstacle when placing concrete on the seismic wall structure 13 composed of the pillar 2 and the seismic wall 6, and the girder reinforcement 5 constituting the girder 4 is arranged in the panel zone 17. Since there is nothing in conflict other than the column reinforcement 3 when installing, workability can be improved.
Further, since the girder 4 is sufficiently fixed to the concrete rough surface 6a formed on both side surfaces of the seismic wall 6, the seismic wall 6 and the girder 4 are not projected without protruding a reinforcing bar or the like generally used for the joint portion. Can be integrated.
[0014]
The construction method of the earthquake-resistant wall structure 13 in the structure 1 provided with such a earthquake-resistant wall structure 13 and the large beam 4 which connects the adjacent earthquake-resistant wall structures 13 is shown below.
[0015]
First, as shown in FIG. 3 (a), on the upper surface of the floor slab 18 on the top floor of the structure 1 in the middle of construction, the column reinforcement 3 and the earthquake resistance of the column 2 constituting the earthquake resistant wall structure 13 are provided. A plurality of structural bar arrangement units 10 are constructed by disposing the wall reinforcement 7 of the wall 6, and the concrete formwork 14 is arranged so as to surround each of them.
The wall reinforcement 7 of the earthquake-resistant wall 6 is a mesh unit in which the horizontal wall bars 8 and the vertical wall bars 9 are arranged in a mesh shape, and the wall beam main bars 12a and the rib bars 12b constituting the wall beam bars 12 are arranged at desired positions. 7a is manufactured in advance in a factory or the like, and after it is brought into the field, it is arranged in pairs at a desired position on the upper surface of the floor slab 18. In connection with this, the wall beam 12 provided in the wall beam 7 which comprises the earthquake-resistant wall 6 is also constructed | assembled simultaneously. After this, the column reinforcement 3 of the column 2 is disposed on each side of the structural bar arrangement unit 10 and the side wall reinforcement 8 constituting the mesh unit 7a is formed so as to protrude inward of the column reinforcement 3. The column connecting bars 19 are fixed to the end portions through fixing means.
[0016]
At this time, a rough surface forming form 15 for forming the concrete rough surface 6a on both side surfaces of the finished seismic wall 6 is formed at the end of the horizontal wall 8 located above the panel zone 17 of the mesh unit 7a. Install it. Then, the concrete formwork 14 is arrange | positioned so that the column reinforcement 3 and the wall reinforcement 7 may be covered.
In the present embodiment, the concrete formwork 14 is a system formwork that can be used by simply assembling a ready-made panel manufactured in a factory or the like on site. In addition, it is not always necessary to install the rough surface forming form 15, and an operation of providing a so-called cotter may be performed after the concrete is hardened.
[0017]
Next, as shown in FIG. 3B, a step of placing concrete 16 inward of the concrete formwork 14 up to the top end level of the pillar 2 (that is, leaving the panel zone 17) is performed as a floor slab. This is sequentially performed on each of the plurality of structural body bar arrangement units 10 arranged on the upper surface of the structure.
As a result, the panel zone 17 of the entire seismic wall structure 13 that forms the entire column 2 is not formed at this time, and the seismic wall 6 remains at the height of the wall beam 7 while leaving its upper edge. This is the end of the first-stage concrete placement for forming the above.
Thereafter, after the concrete 16 is cured, as shown in FIG. 4A, the concrete slabs provided on the plurality of structural body arrangement units 10 are placed on the lower surface of the slab on the upper floor. The second stage concrete 16 is sequentially placed up to the level to form the entire seismic wall 6.
As a result, the placement of the concrete 16 on the structural bar arrangement unit 10 is completed through two steps.
[0018]
Thus, instead of constructing the earthquake-resistant wall structure 13 one unit at a time, the method of dividing the work and simultaneously constructing the plurality of earthquake-resistant wall structures 13 arranged in one layer is the earthquake-resistant wall structure 13. Since the column 2 is configured to be lower in the top end level than the seismic wall 8, the concrete 16 having the height at which the column reinforcement 3 is embedded at the top end is not hardened with respect to the structural bar arrangement unit 10. In addition, when the concrete 16 is driven up to a height at which the wall reinforcement 7 is embedded, a phenomenon in which the concrete 16 in which the column reinforcement 3 is embedded blows out from the concrete formwork 14 is likely to occur. Therefore, by performing the same operation in parallel with respect to the other structural body bar arrangement units 10 by using the time until the concrete 16 having the height at which the column reinforcement 3 is embedded as the top end is hardened. Thus, it is possible to prevent the phenomenon that the concrete 16 in which the column reinforcement 3 is embedded blows out from the concrete formwork 14 while effectively using time.
[0019]
In addition, the quantity of the seismic wall structures 13 constructed in parallel is a method of sequentially performing the two adjacent bodies, a method of sequentially performing the seismic wall structures 13 scheduled to be constructed in the same hierarchy, and the like. Any of them may be used according to the quantity of the concrete formwork 14.
[0020]
Moreover, after the concrete 16 hardens | cures and the earthquake-resistant wall structure 13 is constructed | assembled, the said structure 1 disassembles the concrete formwork 14 and the rough surface formation formwork 15, and as shown in FIG.4 (b). In addition, after arranging the girder bars 5 constituting the girder 4 so as to connect the neighboring seismic wall structures 13 at the upper part of the pillars 2 constituting the seismic wall structure 13 and arranging the concrete formwork (not shown). In addition to constructing the girder 4 by placing concrete 16, the construction of constructing a floor slab (not shown) is repeated for each layer.
[0021]
According to the above-described configuration, the earthquake-resistant wall 6 has a structure in which the end of the wall beam 12 of the wall beam 7 included in the earthquake-resistant wall 6 does not touch the panel zone 17 above the column 2. When the concrete 16 is placed on the structural bar arrangement unit 10 including the reinforcement 7 and the column reinforcement 3, there is no obstacle and the placement can be performed smoothly. Further, when constructing the girder reinforcement 5 constituting the girder 4, there is no bar arrangement in the panel zone 17 other than the column reinforcement 3, so that the work is easy, the workability is good, and the construction period is greatly reduced. it can.
Moreover, since the concrete rough surface 6a is formed in the both sides | surfaces of the earthquake-resistant wall 6, the earthquake-resistant wall 6 and the large beam are made to protrude, without projecting the reinforcing bar etc. which are generally used for the connection part of the large beam 4 and the earthquake-resistant wall 6 The bonding strength with 4 is sufficiently ensured, and integration can be easily achieved.
[0022]
The method for constructing the earthquake-resistant wall structure 13 including the pillar 2 and the earthquake-resistant wall 6 includes a step of placing the first-stage concrete 16 in a plurality of structural body arrangement units 10 including the wall reinforcement 7 and the column reinforcement 3. After the first-stage concrete 16 has hardened, the second-stage concrete 16 is sequentially placed in the structural bar arrangement unit 10 so that the first-stage concrete 16 is hardened and the concrete formwork. By using the time until no longer blows from 14 , the concrete 16 placement work on the other structural body bar arrangement units 10 can be performed in parallel, so the work period can be shortened by the parallel work.
[0023]
Moreover, since the said seismic wall 6 has only to carry in and arrange | position the mesh unit 10 manufactured beforehand in the factory etc. to the site, the reinforcement of the seismic wall 6 can be simplified, and construction cost reduction and construction time reduction are carried out. It can greatly contribute.
Furthermore, the time required for assembling and demolding such as a concrete mold 14 used for the construction of the earthquake-resistant wall structure 13 that does not use a separator or a concrete positioning angle of the concrete mold 14 that has a separator function is used. Employing a shortened formwork for a shear wall can contribute to a shorter construction period.
[0024]
【The invention's effect】
According to the seismic wall according to claim 1, the seismic wall is provided in a structure of a rigid frame structure including a reinforced concrete column and a large beam, and is arranged so as to connect the paired columns crossing the large beam. In each of the end faces on both sides of the earthquake-resistant wall, a concrete rough surface is provided at a height that forms a panel zone between the pillar and the large beam, and the earthquake-resistant wall is provided with a pair. Since the wall beams that connect the columns are arranged at a height below the panel zone of the columns and the large beams, there are no obstacles when placing concrete on the column bars and wall bars, and it is smooth. Can be placed in Further, when constructing the girder bars constituting the girder, there are no bar arrangements in contact with the panel zone other than the column bars, so that the work is easy, the workability is good, and the construction period can be greatly reduced.
Also, since the concrete rough surface is formed on both sides of the seismic wall, the joint strength between the seismic wall and the girder can be increased without projecting the reinforcing bars generally used for the joint between the girder and the seismic wall. It is sufficiently secured and can be easily integrated.
[0025]
According to the construction method of the seismic wall structure according to claim 2, the seismic wall having a height reaching from the upper surface of the floor slab to the lower surface of the floor slab on the upper floor, and the seismic wall disposed on both sides of the seismic wall, Columns that are lower in comparison with the columns and wall beams that connect the upper ends of the columns that are paired to the upper part of the earthquake-resistant wall, and are arranged in parallel with a predetermined separation distance. A plurality of seismic wall structures and beams extending from the top of the column to the lower surface of the floor slab on the upper floor, arranged so as to intersect the seismic wall and joined to the column via a panel zone By doing so, it is a method for constructing a seismic wall structure of a structure comprising a large beam that connects upper portions of opposing columns of adjacent seismic wall structures, wherein the seismic wall structure is placed on the upper surface of a floor slab. together when building the structure reinforcement unit for configuring The structural bar arrangement unit includes a column bar for forming the column, a wall bar for forming the earthquake-resistant wall, and a wall beam bar incorporated in the wall bar, After placing the concrete formwork so as to surround the reinforcement unit, by placing concrete up to the top end level of the pillar in the formwork, the pillar is formed except for the panel zone, and the wall beam reinforcement is The step of forming the earthquake-resistant wall up to the height of embedding and leaving the upper edge portion is sequentially performed on each of the plurality of structural bar arrangement units arranged on the upper surface of the floor slab, and the concrete placed in the step is cured. Thereafter, concrete is again placed on each of the plurality of structural body arrangement units to the lower surface level of the floor slab on the immediately upper floor to form the entire earthquake-resistant wall, and then the large beam is constructed to construct the large beam. And the pillar Since joining through Neruzon, by utilizing the time until the first stage of the concrete it is not blown out from the concrete form by curing, in parallel striking設作industry concrete to other structures Reinforcement units Therefore, it is possible to shorten the work period by parallel work.
[Brief description of the drawings]
FIG. 1 is a diagram showing an outline of a structure having a seismic wall according to the present invention.
FIG. 2 is a diagram showing details of column bars, wall bars, and wall beam bars according to the present invention.
FIG. 3 is a diagram showing a construction method (part 1) of a seismic wall structure according to the present invention.
FIG. 4 is a diagram showing a construction method (part 2) for a seismic wall structure according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Structure 2 Column 3 Column reinforcement 3a Column main reinforcement 3b Band reinforcement 4 Large beam 5 Large beam 6 Earthquake resistant wall 6a Concrete rough surface 7 Wall reinforcement 7a Mesh unit 8 Wall horizontal reinforcement 9 Wall vertical reinforcement 10 Structure reinforcement unit 11 Wall beam 12 Wall Beam bar 12a Wall beam main bar 12b Stirrup 13 Seismic wall structure 14 Concrete formwork 15 Rough surface forming formwork 16 Concrete 17 Panel zone 18 Floor slab 19 Column connection reinforcement

Claims (2)

It is a seismic wall that is provided in a structure of a ramen frame including a reinforced concrete column and a large beam, and is arranged so as to connect the paired columns crossing the large beam,
A concrete rough surface is provided at each of both end faces of the earthquake resistant wall at a height position that forms a panel zone of the pillar and the beam.
A seismic wall, wherein the seismic wall is provided with a wall beam connecting the pair of columns arranged at a height below a panel zone of the column and the large beam. A seismic wall having a height reaching from the upper surface of the floor slab to the lower surface of the floor slab of the immediately upper floor, and a column that is disposed on both sides of the seismic wall and has a lower height than the seismic wall, A plurality of seismic wall structures comprising a wall beam connecting upper ends of the pillars which are provided at the upper part and which are connected to each other, and are arranged in parallel with a predetermined separation distance;
Adjacent earthquake resistance by having beams formed from the top of the pillar to the bottom surface of the floor slab on the directly upper floor, arranged so as to intersect the earthquake resistant wall, and joined to the pillar via the panel zone A method for constructing a seismic wall structure for a structure comprising a large beam connecting upper portions of opposing columns of a wall structure,
On the upper surface of the floor slab, a structural bar arrangement unit for constructing the earthquake-resistant wall structure is constructed, and the structural bar arrangement unit constitutes a column reinforcement for constituting the column and the earthquake-resistant wall. A wall reinforcement for the wall, and a wall beam incorporated in the wall reinforcement,
After placing the concrete formwork so as to surround the structural bar arrangement unit ,
By placing concrete into the formwork up to the top level of the column, the column is formed except for the panel zone, and the seismic wall is embedded to a height where the wall beam is embedded and the upper edge is left. The process of forming is sequentially performed for each of the plurality of structural body arrangement units arranged on the upper surface of the floor slab,
After hardening of the concrete cast in the process ,
For each of the plurality of structural bar arrangement units , concrete is again placed to the lower surface level of the floor slab on the upper floor to form the entire earthquake resistant wall,
After that, the construction method of a seismic wall structure , wherein the girder is constructed and the girder and the column are joined via a panel zone .

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