JP3520483B2 - Reinforcement structure of existing building - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for an existing building, which is suitable for use in reinforcing an existing building such as an aged building without rebuilding it.

[0002]

2. Description of the Related Art Conventionally, existing buildings such as dilapidated buildings are
When reinforcing without rebuilding for the purpose of improving earthquake resistance, for example, as shown in FIG.
A reinforcing structure is used in which a reinforcing frame 5 having a steel brace 4 is mounted between columns 2 and 2 adjacent to each other and beams 3 and 3 located above and below each other. The reinforcing frame 5 and the surrounding columns 2 and 2 and the beams 3 and 3 are integrated by injecting mortar into these gaps and providing anchor members and studs for stress transmission. ing.

Besides this, on the outer periphery of the existing building,
A structure is also used in which a steel-framed brace frame with braces is provided and an existing building is reinforced by this frame structure.

[0004]

However, the conventional reinforcing structure for an existing building as described above has the following problems. First, as shown in FIG. 6, in the structure using the reinforcing frame 5, the reinforcing frames 5, 5, ...
Since it is not integrated over the entire existing building 1, there is a limit to the improvement of the proof stress of the existing building 1 after the reinforcement.

On the other hand, in a reinforcing structure in which a brace frame is provided on the outer periphery of an existing building, the mechanism of force transmission between the columns and beams of the existing building and the frame is unknown, and the brace frame acts on the pillar of the existing building. In order to deal with the axial force, there are problems such as the reinforcement of the columns of the existing building and the construction of additional columns separately from the brace frame. Furthermore, this reinforcing structure
In order to connect the existing building and the brace frame, it is difficult to apply if the pillar does not face the outer circumference of the existing building. In addition, if a brace frame is installed around the existing building, the exterior design of the building will change significantly, and
There is also the problem that the view from the room will deteriorate.

The present invention has been made in consideration of the above points, and an existing building can be efficiently reinforced,
In addition, the purpose is to provide a reinforcing structure for an existing building that does not impair its appearance and view.

[0007]

The invention according to claim 1 is
A structure that reinforces an existing building, and is installed along the pillar in a state intersecting with a beam joined to the pillar of the existing building.
Reinforcement pillar integrally joined to the side surface, reinforcement beam bridged between the two adjacent reinforcement columns and joined to the beam, and reinforcement bridged between the reinforcement column and the reinforcement beam Brace and the reinforcement column, the lower end side of the beam
And the lower reinforcing member disposed on the top end side of the beam.
With the upper reinforcing member and the beams on both sides of the beam
The lower reinforcing member and the upper reinforcing member are joined together.
Reinforcing column unit consisting of a pair of flat plate
It is characterized in that it is formed by continuously connecting in the vertical direction.

According to a second aspect of the present invention, in the reinforcing structure for an existing building according to the first aspect, both plate portions located on both sides of the beam are integrally connected by a connecting member penetrating the beam. It is characterized by being.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the reinforcing structure of the existing building described above, when the reinforcing columns are located on both sides of the column with the column being sandwiched therebetween, the reinforcing columns and the columns are integrated.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of a reinforcing structure for an existing building according to the present invention will be described below with reference to FIGS. 1 to 5. As shown in FIG. 1, a building (existing building) 10 to be reinforced is, for example, a reinforced concrete structure, and columns 11, 11, ... Standing at predetermined intervals in two horizontal directions orthogonal to each other, and these columns 11 It has a ramen structure composed of beams 12 installed between them.

On each outer surface of the building 10, pillars 11a, 11a, ... At predetermined positions and beams 12a, 1 on each floor are provided.
Reinforcement frames 13, 13, ... Having a height from the underground portion to the uppermost floor portion in the up-down direction are disposed in the 2a ,.

As shown in FIG. 2, the reinforcing frame 13 is
Reinforcement column 14 extending along each column 11a, and reinforcement column 1
Reinforcement beam 15 installed between 4 and 14, and these reinforcement columns 1
4, reinforcing braces 16 diagonally arranged between the reinforcing beams 15
It consists of and.

The reinforcing column 14 extends along the side surface of each column 11a and is erected so as to intersect with each beam 12a joined to the column 11a. The reinforcing column 14 has a configuration in which a plurality of reinforcing column units 14a each having a length corresponding to one floor height are continuously connected in the vertical direction.

As shown in FIG. 3, each reinforcing column unit 14
a is a lower reinforcing member 1 arranged on the lower end side of each beam 12a.
7 and the upper reinforcing member 1 disposed on the top end side of each beam 12a
8 and the lower reinforcing member 1 disposed on one side of the beam 12a.
7 and a flat plate-shaped joining plate (plate portion) 19 extending from the lower end portion to the upper end portion of the upper reinforcing member 18. The lower reinforcing member 17 is made of H-shaped steel at a portion of a fixed length below the lower end of the beam 12a, and one flange 17a thereof has a side surface of the beam 12a (a side opposite to the side where the joint plate 19 is disposed). ) Is formed so as to extend to the vicinity of the top end of the joint.
A plate (plate portion) 20 forming a pair with the plate 19 is formed. The upper reinforcing member 18 is made of H-shaped steel having a constant length and extending upward from the top end of the beam 12a. And one of the flanges 18a
The upper end of the plate 20 of the lower reinforcing member 17 is integrally joined to the lower end of the plate 20 by joining means such as welding.

The joint plate 19 is bolted to the other flange 17b of the lower reinforcing member 17 and the other flange 18b of the upper reinforcing member 18, respectively.

Then, the pre- positions located on both sides of the beam 12a.
The joint 20 and the joint plate 19 are integrally joined by a bolt / nut (connecting member) 21 penetrating the beam 12a, whereby the joint plate 19 and the plate 20 are joined together.
It is designed to prevent buckling of the.

Further, the reinforcing pillar units 14a, 14a located above and below each other are arranged above each other.
The web 17c of the lower reinforcing member 17 of 4a and the web 18c of the upper reinforcing member 18 of the lower reinforcing column unit 14a are joined by a joint plate 22. In this way, the reinforcement column 14 is formed by connecting the reinforcement column units 14a, 14a, ... And the reinforcement pillar 14 is the pillar 11 (see FIG. 2).
The plate 12 and the joint plate 19 are sandwiched between the beam 12a at a portion extending along the beam 12a and intersecting the beam 12a.

As shown in FIG. 4, a predetermined number of stud dowels 24 are welded to the web 17c of the lower reinforcing member 17 and the web 18c of the upper reinforcing member 18, while the side surface of the column 11a facing the stud dowels 24 is welded. Anchor 25 is provided by post-casting, and further these webs 17c, 18c and pillar 1 are provided.
A non-shrink mortar 26 is placed and filled between 1a and 1a. As a result, each reinforcing column 14 is integrated with the column 11a. Further, the reinforcing columns 14, 1 of the reinforcing frames 13, 13 located on both sides of the column 11a are sandwiched between them.
The four parts are integrated with the pillar 11a by the non-shrink mortar 27, and the surface located outside the building 10 is thereby integrally covered.

As shown in FIG. 5, the reinforcing beam 15 is formed by cutting off one side of the flange of the H-shaped steel, for example, a section J in cross section.
It is formed from a V-shaped steel material. A predetermined number of stud dowels 28 are welded to the web 15a of the reinforcing beam 15, and a post-installed anchor 29 is provided on the lower end surface or the top end surface of the beam 12a facing the web 15a. Non-shrink mortar 30 between the beam and the beam 12a
Is filled by casting. As a result, the reinforcing beam 15 becomes the beam 1.
It has a structure integrated with 2a.

As shown in FIG. 2, the reinforcing brace 16,
16 are arranged in a substantially inverted V shape between the columns 11a and 11a adjacent to each other, and between the beams 12a and 12a located above and below each other. Each reinforcing brace 16 has its one end 16a joined to the joint between the reinforcing column 14 and the reinforcing beam 15 extending along the top end of the beam 12a via a gusset plate 31, and the other end 16b of the beam 12a. It is joined via a gusset plate 32 to the intermediate portion of the reinforcing beam 15 extending along the lower end. Further, in this figure, reference numeral 33
What is shown in FIG. 2 is a cover plate that covers one flange and the other flange of the reinforcing brace 16 made of H-shaped steel.

In the reinforcing structure of the building 10 described above, the reinforcing frame 13 is erected at a position intersecting the beam 12a and joined to the column 11a, and two reinforcing columns 14 and 14 adjacent to each other. A reinforcing beam 15 that is installed between the reinforcing beam 15 and the beam 12a and a reinforcing brace 16 that is installed between the reinforcing column 14 and the reinforcing beam 15, and a portion of the reinforcing column 14 that intersects the beam 12a is The beam-shaped joint plates 19 and 20 are located on both sides of the beam 12a with the beam 12a interposed therebetween. With this reinforcing frame 13, pillars 11a,
Since the beam 12a can be reinforced, the building 10 can be reinforced and its proof stress can be increased to improve the earthquake resistance and the like. Moreover, the reinforcing column 14 has a structure in which the reinforcing column 14 is continuously integrated in the column 11a in the vertical direction without interfering with the beam 12a. As a result, the force can be reliably transmitted between the building 10 and the reinforcing frame 13, so that the building 10
The reinforcement can be efficiently performed, and the proof stress after the reinforcement can be significantly improved as compared with the conventional case. Further, since the reinforcing column 14 is erected at a position intersecting the beam 12a, it is possible to suppress the column cross-sectional area after reinforcement as compared with, for example, a case where it is erected at a position not intersecting the beam 12a. Therefore, the space can be effectively used.

Further, the joining plates 19 and the plates 20 located on both sides of the beam 12a are integrally connected by a bolt / nut 21 penetrating the beam 12a. Accordingly, it is possible to prevent the joining plate 19 and the plate 20 from buckling due to the stress acting in the vertical direction.

Further, when the reinforcing frames 13 and 13 are arranged on both sides of the pillar 11a so that the reinforcing columns 14 and 14 are located on both sides of the pillar 11a, these reinforcing pillars 14 and 1 are provided.
The non-shrinkable mortar 27 integrates the column 4 and the column 11a. As a result, after reinforcement,
The pillar 11a and the pillar 11a can be integrally covered, and the appearance of the building 10 can be prevented from being impaired.

In addition, the reinforcing columns 14 are unitized,
Each reinforcing column unit 14a is composed of an upper reinforcing member 17, a lower reinforcing member 18, and a joint plate 19. By unitizing in this way, not only can the reinforcing columns 14 be easily assembled, but also each member can be manufactured easily and at low cost.

Further, the pillar 11a, the reinforcing pillar 14, and the beam 12 are provided.
In order to integrally join a and the reinforcing beam 15, the non-shrinkable mortars 27 and 30 are placed and filled between them. As a result, even when the distance between the pillars 11a and the beams 12a varies depending on the location, the non-shrink mortar 27,
This can be easily accommodated by adjusting the thickness of 30.

In the above embodiment, the beam 12a is connected by the bolts and nuts 21 in order to prevent the joint plates 19 and 20 from buckling.
Instead, use anchor bolts that do not penetrate,
You may employ | adopt the structure which forms a reinforcement rib in the joining plate 19 and the plate 20 , puts a stiffener, and raises the board thickness. Further, the reinforcing column 14 is integrated with the column 11a, but this integrated portion may extend over the entire length of the reinforcing column 14 depending on the stress transmission state between the building 10 and the reinforcing frame 13. Alternatively, only a part, for example, the panel zone may be provided. Further, for the reinforcing column 14, the reinforcing beam 15, and the reinforcing brace 16 of the reinforcing frame 13, for example, high-strength steel, tensile material, compression material, or the like may be used. The reinforcing brace 16 may be arranged in a shape other than the inverted V shape, such as a W shape, an X shape, or a K shape. further,
Even if the existing building to be reinforced has another structure other than the reinforced concrete building 10 shown in the above embodiment, such as a steel frame reinforced concrete structure, a precast concrete structure, a steel frame structure, the same effect can be obtained. It is possible. In addition, it is also possible to arrange the reinforcing frame along the pillars and beams located inside the existing building. As a result, it is possible to prevent the appearance, view, and lighting of the existing building from being damaged.

[0027]

As described above, according to the reinforcing structure for an existing building according to claim 1, a reinforcing column which is erected at a position intersecting with a beam and joined to the column, and two reinforcing columns adjacent to each other. It is composed of a reinforcing beam that is erected between columns and joined to the beam, and a reinforcing brace that is installed between the reinforcing columns and the reinforcing beams. It is configured by a flat plate portion located. These reinforcement columns,
By using the reinforcing beams and braces, it is possible to significantly improve the reinforcing capacity of the existing building and increase the earthquake resistance. Moreover, a reinforcing column and a lower reinforcing member arranged on the lower end side of the beam,
The upper reinforcing member arranged on the top end side of the beam and the beam
Located on both sides, the lower and upper reinforcement members
Reinforcement column consisting of a pair of flat plate-shaped plate parts that join cattle
As a structure in which the units are connected continuously in the vertical direction , the reinforcing columns are continuous in the vertical direction without interfering with the columns and beams of the existing building and integrated with the columns, so Can reliably transmit power between
It is possible to carry out the reinforcement efficiently and to significantly improve the proof stress after the reinforcement as compared with the conventional one. In addition, since the reinforcing column is erected at a position that intersects the beam, it is possible to suppress the column cross-sectional area after reinforcement as compared to, for example, when it is erected at a position that does not intersect the beam. It can be utilized.

According to the reinforcing structure of the existing building of the second aspect, both plate portions located on both sides of the beam are integrally connected by a connecting member penetrating the beam. Thereby, it is possible to prevent both plate portions from buckling due to the stress acting in the vertical direction.

According to the reinforcing structure for an existing building of claim 3, when the reinforcing columns are located on both sides of the column, the reinforcing columns and the columns are integrated. At this time, if the reinforcing pillar and the pillar are integrally covered with, for example, concrete, it is possible to reinforce the existing building without impairing the appearance of the existing building even when the reinforcing pillar is located at the outer peripheral portion of the existing building. .

[Brief description of drawings]

FIG. 1 is a plan sectional view showing an example of a reinforcing structure for an existing building according to the present invention.

FIG. 2 is a vertical sectional view showing the reinforcing structure.

FIG. 3 is a side sectional view of FIG.

FIG. 4 is a plan sectional view showing a joint structure of columns and reinforcing columns in the reinforcing structure.

FIG. 5 is a plan sectional view showing a joint structure of a beam and a reinforcing beam in the same reinforcing structure.

FIG. 6 is an elevational view showing an example of a conventional reinforcing structure for an existing building.

[Explanation of symbols]

10 Building (Existing Building) 11 Column 12 Beam 14 Reinforcement Column 14a Reinforcement Column Unit 15 Reinforcement Beam 16 Reinforcement Brace 17 Lower Reinforcement Member 18 Upper Reinforcement Member 19 Joining Plate (Plate Part) 20 Plate (Plate Part) 21 Bolts / Nuts ( (Connecting member)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Nagami 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (56) Reference JP-A-2-128035 (JP, A) JP-A 54-41529 (JP, A) JP-A-59-41558 (JP, A) JP-A-58-7065 (JP, A) JP-A-2-186024 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04G 23/02 E04H 9/02

Claims (3)

(57) [Claims] 1. A structure for reinforcing the existing buildings, pillar in a state of intersecting the beam is joined to the pillar of the existing buildings
Reinforcement pillars along which the side surfaces are integrally joined , two reinforcement pillars that are installed between two adjacent reinforcement pillars adjacent to each other, and are joined to the beams, and between the reinforcement pillars and the reinforcement beams The reinforcing column is composed of a reinforcing brace that is erected, and the reinforcing column is a lower reinforcing portion disposed on the lower end side of the beam.
Member, an upper reinforcing member arranged on the top end side of the beam, and the beam
The lower reinforcing member that is located on both sides of
And a pair of flat plates that join the upper reinforcing members to each other
Connecting the reinforcement column units, which are
Reinforcement structure of existing building characterized by being formed by 2. The reinforcing structure for an existing building according to claim 1, wherein both plate portions located on both sides of the beam are integrally connected by a connecting member penetrating the beam. Reinforcement structure of existing building. 3. The reinforcing structure for an existing building according to claim 1 or 2, wherein the reinforcing columns and the columns are integrated when the reinforcing columns are located on opposite sides of the column. Reinforcement structure of existing building characterized by.