JP7022015B2 - Building reinforcement method - Google Patents

Description

The present invention relates to a building reinforcement method for damping and reinforcing a vertical structural surface of a building by passing a vibration damping mechanism between a plurality of pillars of the building.

As a technique for damping and reinforcing the vertical structure surface of a building, a vibration damping brace equipped with a damper capable of attenuating seismic energy by deforming along the axial direction is widely known (see, for example, Patent Document 1). If such a damping brace is provided in the building, the vertical structure surface of the building can be vibration-damped and reinforced, but since the damping brace is arranged diagonally between the diagonal joints of the vertical structure surface. , A large installation space is required above and below the total height of the vertical structure surface, and the layout and appearance of the building will be changed before and after (or whether or not to adopt) the vibration damping reinforcement.

Patent Document 2 describes a building reinforcement method in which a erection material extending in a substantially horizontal direction is provided on the upper side of a vertical structure surface independently of the building, and a damper is provided between the pillar of the building and the erection material. There is. In this building reinforcement method, since the erection material extends in a substantially horizontal direction on the upper side of the vertical structure surface, the building can be reinforced without significantly changing the floor plan and appearance of the building.
In addition, Patent Document 3 describes a building reinforcement method in which a damper is provided at the joint of a horizontal structure in which beams are assembled in a plumb bob shape on the ceiling side of a wooden building. It is for damping and reinforcing the structural surface, not for damping and reinforcing the vertical structural surface of the building.

JP-A-2002-357013 Japanese Unexamined Patent Publication No. 2016-50474 Japanese Patent No. 6095017

Although the technique described in Patent Document 2 can reinforce a building without significantly changing the floor plan and appearance of the building, a dedicated pillar or the like for supporting the erection material independently of the building is provided. It is necessary, and there is an inconvenience that the structure becomes complicated and large.

The present invention has been made in view of the above-mentioned circumstances, and the main problem thereof is a building having a simple structure and capable of reinforcing the building while suppressing changes in the floor plan and appearance of the building as much as possible. The point is to provide a reinforcement method.

The first characteristic configuration of the present invention is a building reinforcement method for damping and reinforcing a vertical structural surface of a building by passing a vibration damping mechanism between a plurality of pillars of the building.
The vibration damping mechanism is pin-connected to the upper and lower chords attached to the plurality of pillars in a state extending between the pillars, and to the upper and lower chords in a state extending between the upper and lower chords. It is provided with a connecting member and a plurality of dampers provided over each of the chord material and the plurality of connecting members to apply a damping force to the relative displacement between the chord material and each of the plurality of connecting members. Configured ,
The point is that the vibration damping mechanism is housed in the underfloor space or the attic space of the building .

According to this configuration, when a pair of columns constituting one vertical structural surface tilts to one side (for example, to the right) during an earthquake, the upper chord material moves to the right than the lower chord material. A plurality of connecting members extending between the upper and lower chords will also be tilted to one side in the same way as the pillar. Therefore, the plurality of dampers provided over each of the plurality of connecting members and the chord material, even if they are relatively small in size, with respect to the relative displacement of each of the plurality of connecting members and the chord material. A sufficient damping force can be applied, and seismic energy can be efficiently damped.
Since the upper and lower chords constituting the vibration damping mechanism are attached to the pillars of the building, a separate support structure such as a dedicated pillar is not required, and the upper and lower chords constituting the vibration damping mechanism are horizontal. Since the member extends in the direction, the installation space of the vibration damping mechanism can be a part of the height area such as the upper part and the lower part of the vertical structure surface.
Therefore, with a simple structure, it is possible to reinforce the building while suppressing changes in the floor plan and appearance of the building as much as possible.
Further, according to this configuration, since the vibration damping mechanism is housed in the underfloor space or the attic space of the building, it is possible to reinforce the building without changing the floor plan or appearance of the building.

The second characteristic configuration of the present invention is that the vibration damping mechanism can be attached to and detached from the pillar via a joining member provided around the pillar so that the building can be restored to the appearance before the vibration damping reinforcement. It is in the point that it is indirectly fixed in such a state .

According to this configuration, by removing the vibration damping mechanism indirectly attached to the pillar in a detachable state, the building can be restored to the appearance before the vibration damping reinforcement as needed.

The third characteristic configuration of the present invention is a building reinforcement method for damping and reinforcing the vertical structural surface of a building by passing a vibration damping mechanism between a plurality of pillars of the building.
The vibration damping mechanism is pin-connected to the upper and lower chords attached to the plurality of pillars in a state extending between the pillars, and to the upper and lower chords in a state extending between the upper and lower chords. It is provided with a connecting member and a plurality of dampers provided over each of the chord material and the plurality of connecting members to apply a damping force to the relative displacement between the chord material and each of the plurality of connecting members. Configured,
The vibration damping mechanism is indirectly fixed to the pillar in a detachable state via a joining member provided around the pillar so that the building can be restored to the appearance before the vibration damping reinforcement. ,
As the vibration damping mechanism, a front side vibration damping mechanism arranged on the front side of the plurality of pillars and a back side vibration damping mechanism arranged on the back side of the plurality of pillars are provided.
In order to provide the vibration damping mechanism on the front side and the back side between the plurality of pillars, the bonding member is sandwiched between the vibration damping mechanisms on the front side and the back side, and the vibration damping mechanism on the front side and the back side and the bonding member. Is at the point where it is fastened and fixed with a fastener at a point where it is separated from the pillar .

According to this configuration, when a pair of columns constituting one vertical structural surface tilts to one side (for example, to the right) during an earthquake, the upper chord material moves to the right than the lower chord material. A plurality of connecting members extending between the upper and lower chords will also be tilted to one side in the same way as the pillar. Therefore, the plurality of dampers provided over each of the plurality of connecting members and the chord material, even if they are relatively small in size, with respect to the relative displacement of each of the plurality of connecting members and the chord material. A sufficient damping force can be applied, and seismic energy can be efficiently damped.
Since the upper and lower chords constituting the vibration damping mechanism are attached to the pillars of the building, a separate support structure such as a dedicated pillar is not required, and the upper and lower chords constituting the vibration damping mechanism are horizontal. Since the member extends in the direction, the installation space of the vibration damping mechanism can be a part of the height area such as the upper part and the lower part of the vertical structure surface.
Therefore, with a simple structure, it is possible to reinforce the building while suppressing changes in the floor plan and appearance of the building as much as possible.
Further, according to this configuration, by removing the vibration damping mechanism indirectly attached to the pillar in a detachable state, the building can be restored to the appearance before the vibration damping reinforcement as needed.

Further, according to this configuration, it is possible to greatly attenuate the seismic energy at the time of an earthquake by using both the front side and the back side vibration damping mechanisms. Moreover, since the vibration damping mechanism on the front side and the back side is fastened and fixed at a position separated from the pillar via the joining member provided around the pillar, the vibration damping mechanism on the front side and the back side is held between the plurality of pillars without damaging the pillar. Buildings can be reinforced across mechanisms.

In the fourth characteristic configuration of the present invention, the joining member is divided into a front side split joining member arranged on the front side of the pillar and a back side split joining member arranged on the back side of the pillar.
The point is that the vibration damping mechanism on the front side and the back side and the split joining member on the front side and the back side are fastened and fixed by the fastener.

According to this configuration, the front side and back side split-joining members are arranged in a state of sandwiching the pillar, and the front-side and back-side vibration damping mechanisms are arranged in a state of sandwiching the front-side and back-side split-joining members, and the front-side and back-side vibration damping mechanisms are arranged. By fastening and fixing the split joining member of the above and the split joining member of the front side and the back side with fasteners, the vibration damping mechanism can be efficiently installed without damaging the pillar.

In the fifth characteristic configuration of the present invention, the joining member is arranged in a state where the joining member is arranged on the inner side of the building of the pillar and the inner joining member arranged on the outer side of the building of the pillar and sandwiches the pillar. It is composed of an inner joining member and a joining band member to be connected.
The point is that the vibration damping mechanism on the front side and the back side and the inner joining member are fastened and fixed by the fastener.

According to this configuration, among the joining members, the low-bulk joining band member is arranged on the outer side of the building of the pillar, so that the pillar is an outer peripheral pillar arranged on the outer peripheral portion of the building. However, the joining members are not conspicuous after the building is reinforced, and the appearance of the building can be maintained well.
The sixth characteristic configuration of the present invention is that a large number of the connecting members are arranged side by side at intervals in the extending direction of the chord member.
According to this configuration, by arranging a large number of connecting members side by side at intervals in the extending direction of the chord material, an appropriate space for installing a large number of dampers extending over the large number of connecting members and the chord material is appropriately secured. can do. Therefore, a large number of dampers can be appropriately operated to realize a large damping force.
The seventh characteristic configuration of the present invention is a joint damper in which the damper is attached to each of the joints of the upper and lower chord members and the plurality of connecting members, and yields before the pillar in the event of an earthquake. At the point.
According to this configuration, by attaching a joint damper to each of the joints between the upper and lower chords and the plurality of connecting members, it is possible to increase the number of damper installation locations and reduce the size of each damper. ..
Then, a large number of joint dampers yield before the pillars in the event of an earthquake to attenuate the vibration energy, so that damage to the pillars can be appropriately avoided.

(A) Vertical cross-sectional view of the main part of the building reinforcement structure that has been vibration-damped by the building reinforcement method, (b) Vertical cross-sectional view of the main part showing the vibration-damping mechanism of the building reinforcement structure. An exploded perspective view of the main part of the building reinforcement structure (A) A diagram showing the attachment structure of the vibration damping mechanism to the inner pillar, (b) A diagram showing the attachment structure of the vibration damping mechanism to the outer peripheral pillar. Vertical sectional view of the main part of the building reinforcement structure showing another embodiment of the building reinforcement method.

An embodiment of the building reinforcement method (building reinforcement structure) of the present invention will be described with reference to the drawings.
FIG. 1A shows a main part of a building reinforcement structure in which vibration damping reinforcement is applied to an existing building EB (an example of a building) by a building reinforcement method. In this building reinforcement method, the vertical structure surface K of the existing building EB is vibration-damped and reinforced by passing the vibration damping mechanism 1 between a plurality of columns (existing columns) P of the existing building EB.

The structural form of the existing building EB to be reinforced may be various structural forms, but in the present embodiment, the case of wooden construction is taken as an example. In this existing wooden building EB, a plurality of wooden pillars P are erected on a support structure S made of concrete, stone, etc., and a horizontal member such as a wooden beam (not shown) is placed between the plurality of pillars P. An existing skeleton having a vertical structure surface K composed of a plurality of columns P and a horizontal member is constructed so as to be bridged. A floor material F, a wall material W, a roof material (not shown), and the like are supported by the existing skeleton.
Then, in the building reinforcement method of the present embodiment, the vibration damping mechanism 1 is housed in the underfloor space (existing underfloor space) S1 below the floor material F in the existing building EB, so that the floor plan and appearance in the existing building EB can be improved. The existing building EB is reinforced without any changes.

Hereinafter, the vibration damping mechanism 1 will be described.
As shown in FIG. 1, the vibration damping mechanism 1 extends between the upper and lower chord members 11A and 11B attached to the plurality of pillars P and between the upper and lower chord members 11A and 11B. A plurality of connecting members 12 pin-connected to the upper and lower chord members 11A and 11B, and each of the chord members 11A and 11B and the plurality of connecting members 12 are provided, and a plurality of connecting members 11A and 11B are connected to each other. It is configured to include a plurality of dampers 20 that apply a damping force to the relative displacement of each of the members 12.

The upper and lower chord members 11A and 11B are composed of wooden cross rails in a substantially horizontal posture, and are attached to the four pillars P in a state of extending over the four pillars P constituting the plurality of vertical structural surfaces K. Further, the lower chord member 11B is installed in a state of being in contact with the upper surface of the support structure S. The upper and lower chord members 11A and 11B may be attached to the two pillars P so as to extend between the two pillars P constituting the vertical structure surface K at least, and are separated for each vertical structure surface K. Can be configured.

The connecting member 12 is composed of a wooden vertical rail in a substantially vertical posture, and is arranged side by side at predetermined intervals in the extending direction (X direction in the figure) of the upper and lower chord members 11A and 11B. A plurality of connecting members 12 are arranged side by side in a state where a plurality of connecting members 12 are arranged inside the vertical structure surface K. FIG. 1 illustrates a case where five connecting members 12 are arranged inside the vertical structure surface K on the center side, and two connecting members 12 are arranged on each of the left side and the right side vertical structure surface K. ing. The upper and lower chord members 11A and 11B and a large number of connecting members 12 form a ladder-like structure.

The upper end of the connecting member 12 is pin-connected to the upper chord member 11A, and the lower end is pin-connected to the lower chord member 11B. The pin connecting structure of the connecting member 12 and the upper and lower chord members 11A and 11B is, for example, one piece along the front and back directions (Y direction) orthogonal to the extending direction (X direction) of the upper and lower chord members 11A and 11B. It may be rotatably connected with a through bolt, or may be connected in a joining form such as pin joining with a low degree of fixation, and the front and back directions orthogonal to the extending direction (X direction) of the upper and lower chord members 11A and 11B. Various pin connection structures that can rotate around the axis along the (Y direction) can be adopted.

The damper 20 is a metal-based shear damper that yields before the pillar P at the time of an earthquake, and is a joint attached to each of the joints between the upper and lower chord members 11A and 11B and the plurality of connecting members 12. It consists of dampers.

For example, each damper 20 is configured by providing a flange-shaped mounting portion on one end side and the other end side of the damper body extending along a 1/4 arc. Then, in each of the joints between the upper and lower chords 11A and 11B and the plurality of connecting members 12, the attachment portion on one end side of the damper 20 is attached to the upper and lower chords 11A and 11B with a fixing tool such as a bolt. It is attached in a fixed state, and the attachment portion on the other end side of the damper 20 is attached to the side of the connecting member 12 in a fixed state with a fixing tool such as a bolt.
The damper 20 is attenuated to the relative displacement of the upper and lower chord members 11A and 11B by plastically deforming the damper body with the relative posture change (relative displacement) between the upper and lower chord members 11A and 11B and the connecting member 12. Power can be applied.

In this embodiment, as shown in FIG. 2 (connecting member 12 and damper 20 are omitted), the front side arranged on the front side (lower right side in the figure) of a plurality of pillars P as the vibration damping mechanism 1. A vibration damping mechanism 1A and a vibration damping mechanism 1B on the back side arranged on the back side (upper left side in the figure) of a plurality of pillars P are provided so as to exert a large vibration damping effect while saving space. There is. The vibration damping mechanism 1A and the vibration damping mechanism 1B on the front side can be integrated, for example, by connecting the upper and lower chord members 11A and 11B to each other via a plurality of horizontal connecting members (not shown).

In the building reinforcement structure with vibration damping reinforcement in this way, as shown in FIG. 1 (b), when a pair of columns P constituting one vertical structural surface K are tilted to the right (one side) at the time of an earthquake. , The chord material 11A on the upper side of the chord material 11B on the lower side moves to the right, and the plurality of connecting members 12 extending between the upper and lower chord materials 11A and 11B also tilt to one side like the pillar P. become. Therefore, the plurality of dampers 20 provided over each of the plurality of connecting members 12 and the chord members 11A and 11B are each of the plurality of connecting members 12 and the chord members, even if they are relatively small in size. A sufficient damping force can be applied to the relative displacements of 11A and 11B, and the seismic energy can be efficiently damped at the time of an earthquake.

Next, with reference to FIGS. 2 and 3, a method (mounting structure) for mounting the vibration damping mechanism 1 on the pillar P will be described. In the building reinforcement method of the present embodiment, the method of attaching the vibration damping mechanism 1 to the internal pillar P2 (pillar P inside the building) (see FIG. 3A) and the damping to the outer peripheral pillar P1 (pillar P on the outer periphery of the building). Two types of methods of mounting the vibration mechanism 1 (see FIG. 3B) are used.

(Common configuration)
As a common configuration of the two types of mounting methods, as shown in FIGS. 2 and 3, the vibration damping mechanism 1 is a pillar so that the existing building EB can be restored to the appearance before the vibration damping reinforcement. It is indirectly fixed to the pillar P in a detachable state via the joining member 31 provided around P. Therefore, if necessary, the vibration damping mechanism 1 can be removed to restore the existing building EB to the appearance before the vibration damping reinforcement.

Specifically, as shown in FIG. 2, the vibration damping mechanism 1 is fixed to each of the pillars P at two places, upper and lower, by using two upper and lower joining members 31.
As shown in FIG. 3, on the upper side, the chord members 11A and 11A on the upper side of the vibration damping mechanisms 1A and 1B on the front side and the back side and the joining member 31 on the upper side provided around the pillar P are formed on the pillar P. It is fastened and fixed by a common fastener 32 at a position that is outwardly displaced in the left-right direction (X direction) from the above. Similarly, on the lower side, the lower chord members 11B and 11B of the front and back vibration damping mechanisms 1A and 1B and the lower joining member 31 provided around the pillar P are arranged in the left-right direction from the pillar P. It is fastened and fixed by a common fastener 32 at a place that is detached to the outside.
As shown in FIG. 3, the fastener 32 is composed of, for example, a long bolt 32A and nuts 32B screwed on both ends in the bolt axial direction, and is joined with vibration damping mechanisms 1A and 1B on the front and back sides. The member 31 is tightened and fixed in a co-tightened state from the front and back directions (Y direction).

In this way, the vibration damping mechanisms 1A and 1B on the front side and the back side are fastened and fixed at a position separated from the pillar P via the joining member 31 provided around the pillar P, so that the pillar P is not damaged. The vibration damping mechanisms 1A and 1B on the front side and the back side can be extended between the pillars P of the above.
The vibration damping mechanism 1 and the pillar P have the above-mentioned pin connection structure or the like capable of rotating around an axis orthogonal to the extending direction (X direction) of the upper and lower chord members 11A and 11B of the vibration damping mechanism 1. It may be attached.

(How to attach the vibration damping mechanism 1 to the internal pillar P2)
In the method of attaching to the inner pillar P2, as shown in FIG. 3A, the joining member 31 is attached to the front side wooden split joining member 31A arranged on the front side of the inner pillar P2 and the back side of the inner pillar P2. It is divided into two parts (an example of a plurality of divisions) in the front-back direction (vertical direction in the figure) with the wooden split-joining member 31B on the back side to be arranged. The front and back vibration damping mechanisms 1A and 1B and the front and back split joining members 31A and 31B are arranged so as to sandwich the internal pillar P2 from the front and back directions, and are fastened and fixed by the fastener 32 from the front and back directions. To.

The front side and back side split joining members 31A and 31B are provided with semicircular mounting recesses 31a into which about half of the internal pillar P2 can be fitted in the middle portion of one side of the rectangular shape in a plan view. The pillar P is located between the recesses 31a, and the facing surfaces (planes located on both sides of the mounting recess 31a) of the two split joining members 31A and 31B are in contact with each other around the pillar P. It is configured to be deployable. The front and back side split joining members 31A and 31B are formed in a symmetrical shape in the front and back directions (Y direction), and are arranged around the inner pillar P2 in a state of forming a rectangular shape in a plan view.

(How to attach the vibration damping mechanism 1 to the outer peripheral pillar P1)
In the attachment method to the outer peripheral pillar P1, as shown in FIG. 3B, the joining member 31 is a wooden inner joining member 31D arranged on the inner side of the building (right side in the figure) of the outer peripheral pillar P1. It is composed of a flexible joining band member 31E which is arranged on the outer side of the building (left side in the figure) of the outer peripheral pillar P1 and is connected to the inner joining member 31D while sandwiching the outer peripheral pillar P1, and is composed of the front side and the back side. The vibration damping mechanisms 1A and 1B of No. 1 and the inner joining member 31D attached around the outer peripheral pillar P1 are fastened and fixed by the fastener 32 from the front and back directions (Y direction). The bonding band member 31E is made of a high-strength material such as carbon fiber.
As described above, among the joining members 31, the low-bulk joining band member 31E is arranged on the outer side of the outer peripheral column P1 so that the joining member 31 does not stand out after the building is reinforced. , The appearance of the building can be maintained well.

The inner joining member 31D is provided with a protruding portion 31b protruding toward the outer peripheral pillar P1 at an intermediate portion of the side of the outer peripheral pillar P1 side (left side) in a plan view. The width of the protruding portion 31b in the front-back direction (Y direction) is configured to have the same dimensions as the diameter of the outer peripheral column P1. A semi-circular mounting recess 31a into which about half of the outer peripheral pillar P1 can be fitted is formed on the tip surface of the protrusion 31b.
The inner joining member 31D is arranged around the outer peripheral pillar P1 with the inner side of the pillar P located in the mounting recess 31a on the tip surface of the protrusion 31b, and is arranged so as to surround the outer peripheral pillar P1. Both ends of the band member 31E are fixed to the outer peripheral column P1 by fixing them to both the front and back surfaces of the protruding portion 31b of the inner joining member 31D with a fixing tool 33 such as a bolt or a screw.

[Another Embodiment]
(1) In the above-described embodiment, as shown in FIG. 1A, the vibration damping mechanism 1 is housed in the underfloor space (existing underfloor space) S1 below the floor material F in the existing building EB. Instead of this, as shown in FIG. 4, the vibration damping mechanism 1 is used in the attic space (existing attic space) S2 above the ceiling material C (indoor space if there is no ceiling material C) in the existing building EB. You may put it in. In this case as well, the existing building EB can be reinforced without changing the floor plan or appearance of the existing building EB.

(2) In the above-described embodiment, the case where the upper and lower chord members 11A and 11B and the connecting member 12 are made of wood is shown as an example, but they may be made of steel, metal, or the like.

(3) In the above-described embodiment, the case where the damper 20 is composed of a shear damper is shown as an example, but it may be composed of a viscous damper, an oil damper, or the like.

(4) The mounting method (mounting structure) of the vibration damping mechanism 1 to the pillar P is not limited to the mounting method (mounting structure) shown in the above-described embodiment, and the state of the existing building EB, the installation site of the vibration damping mechanism 1, etc. Various mounting methods (mounting structures) according to the above can be used.

(5) The building reinforcement method (building reinforcement structure) of the present invention is suitable not only when the existing building EB shown in the above-described embodiment is subjected to vibration damping reinforcement, but also when the new building is subjected to vibration damping reinforcement. Can be applied.

1 Vibration damping mechanism 1A Vibration damping mechanism on the front side 1B Vibration damping mechanism on the back side 11A String material on the upper side 11B String material on the lower side 12 Connecting member 20 Damper 31 Joining member 31A Front side split joining member 31B Back side split joining Member 31D Inner joining member 31E Joining band member 32 Fastener EB Existing building (building)
K Vertical structure surface P Pillar S1 Underfloor space S2 Attic space

Claims (7)

It is a building reinforcement method that vibration-damps and reinforces the vertical structural surface of the building by passing a vibration-damping mechanism between multiple pillars of the building.
The vibration damping mechanism is pin-connected to the upper and lower chords attached to the plurality of pillars in a state extending between the pillars, and to the upper and lower chords in a state extending between the upper and lower chords. It is provided with a connecting member and a plurality of dampers provided over each of the chord material and the plurality of connecting members to apply a damping force to the relative displacement between the chord material and each of the plurality of connecting members. Configured ,
A building reinforcement method in which the vibration damping mechanism is housed in the underfloor space or the attic space of the building. The vibration damping mechanism is indirectly fixed to the pillar in a detachable state via a joining member provided around the pillar so that the building can be restored to the appearance before the vibration damping reinforcement. The building reinforcement method according to claim 1 . It is a building reinforcement method that vibration-damps and reinforces the vertical structural surface of the building by passing a vibration-damping mechanism between multiple pillars of the building.
The vibration damping mechanism is pin-connected to the upper and lower chords attached to the plurality of pillars in a state extending between the pillars, and to the upper and lower chords in a state extending between the upper and lower chords. It is provided with a connecting member and a plurality of dampers provided over each of the chord material and the plurality of connecting members to apply a damping force to the relative displacement between the chord material and each of the plurality of connecting members. Configured,
The vibration damping mechanism is indirectly fixed to the pillar in a detachable state via a joining member provided around the pillar so that the building can be restored to the appearance before the vibration damping reinforcement.
As the vibration damping mechanism, a front side vibration damping mechanism arranged on the front side of the plurality of pillars and a back side vibration damping mechanism arranged on the back side of the plurality of pillars are provided.
In order to provide the vibration damping mechanism on the front side and the back side between the plurality of pillars, the bonding member is sandwiched between the vibration damping mechanisms on the front side and the back side, and the vibration damping mechanism on the front side and the back side and the bonding member. A building reinforcement method in which and is fastened and fixed with fasteners at a location that is detached from the pillar . The joining member is divided into a front side split joining member arranged on the front side of the pillar and a back side split joining member arranged on the back side of the pillar.
The building reinforcing method according to claim 3 , wherein the vibration damping mechanism on the front side and the back side and the split joining member on the front side and the back side are fastened and fixed by the fastener. The joining member is connected to the inner joining member arranged on the inner side of the building of the pillar and the inner joining member arranged on the outer side of the building of the pillar and sandwiching the pillar. It is composed of band members and
The building reinforcing method according to claim 3 , wherein the vibration damping mechanism on the front side and the back side and the inner joining member are fastened and fixed by the fastener. The building reinforcing method according to any one of claims 1 to 5 , wherein a large number of the connecting members are arranged side by side at intervals in the extending direction of the chord member. Any one of claims 1 to 6, wherein the damper is attached to each of the joints of the upper and lower chord members and the plurality of connecting members, and is a joint damper that yields before the pillar in the event of an earthquake. The building reinforcement method described in the section .

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