JP2012167524A - Aseismatic reinforcement structure for existing building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aseismatic reinforcement structure for existing building capable of exhibiting sufficient reinforcement effect even when only either a left or right bracing member is arranged on one surface outside the building.SOLUTION: A pair of right and left attached foundations 2 are arranged in right and left corner parts of one arbitrary surface in an existing building H. A round bar 8 is disposed between both attached foundations 2 through a turnbuckle 7, and movement of both attached foundations 2 in a separating direction thereof is regulated. A brace 17 is arranged aslant between a beam 10 on the upper side of the existing building H and one of right or left attached foundations 2. A base plate 20 to abut on the top face of the attached foundation 2 is formed in the brace 17. Such aseismatic reinforcement structure can achieve aseismatic reinforcement by using only one brace 17.

Description

  The present invention relates to a seismic reinforcement structure that is applied mainly to protect existing buildings from earthquake shaking.

Conventionally, various measures have been proposed to increase the earthquake resistance of buildings.
For example, in Patent Document 1, as shown in FIG. 1, connecting members 6 and 10 (brace-like members) provided with a tension adjusting mechanism 4 (turn buckle) are disposed between the base 2 and the second floor beam 3 diagonally. Thus, a technique for improving earthquake resistance is disclosed. The technique of Patent Document 1 is a reinforcement work to be performed on a building that is currently under construction, and the bracing members made up of these turnbuckles and brace-like members are housed inside the wall with the completion of the building, and therefore do not interfere.
However, in recent years, in order to improve the strength of existing buildings against earthquakes, there is an increasing demand for additional construction of such an earthquake-resistant structure on existing buildings.
In that case, for example, an existing building where there is room in a space, such as a warehouse or a factory, and only the function is important, it is also possible to dispose a bracing member near the inner wall surface of the building. However, it is not preferable to dispose the bracing member on the inner side (that is, the residential side) in a general house from the viewpoint of aesthetics or space limitations. In that case, if a construction is made in which a bracing member is built in the wall as in Patent Document 1, the construction cost will be extremely high.
For this reason, there is an idea that the bracing member is disposed outside the existing building. Patent Document 2 is cited as such prior art. Patent Document 2 is a technique proposed by the applicant, and a separate attached foundation is constructed outside the foundation of an existing building, and a bracing member is obliquely stretched between the beam and the anchor embedded in the attached foundation. It is what you do. With such a technology, there is no influence on the inner side of the house, and because the reinforcement is made between the attached foundation and the beam, the existing building will be firmly fixed to the foundation and the reinforcement effect will be high It is.

JP-A-9-111875 JP 2006-118234 A

By the way, it is desirable that two bracing members are arranged in an oblique cross shape with respect to one surface that needs to withstand the force from either the left or right direction. However, when arranging the bracing member outside the existing building, even if one bracing member can be arranged due to the presence of various equipment, for example, an outdoor unit of an air conditioner, an installed storage, etc. There is a case where the other bracing member cannot be attached by any means. This is a problem that arises because it is an existing building that is difficult to imagine in a new building.
Therefore, even when only one of the left and right bracing members is arranged on a surface on the outside of the building, there has been a demand for a seismic reinforcement structure for an existing building that can be sufficiently reinforced by the bracing members.
The present invention has been made paying attention to such problems existing in the prior art. An object of the invention is to provide a seismic reinforcement structure for an existing building that can provide a sufficient reinforcing effect even when only one of the right and left bracing members is arranged on a surface on the outside of the building.

In order to achieve the above object, according to the first aspect of the present invention, a pair of left and right attached foundations that engage with the existing building is disposed at the left and right corners of any one surface of the existing building, and both A connecting member for restricting the movement of the two attached foundations in the separating direction is arranged between the attached foundations, while the frame member arranged on the upper side of the existing building and the left and right attached foundations The gist is that the bracing members are disposed obliquely between the two.
In such a configuration, a pair of left and right attached foundations that engage with the existing building is disposed at the left and right corner portions of any one surface of the existing building. And the connection member for restricting the movement to the separation | spacing direction of both attachment foundations is arrange | positioned between both attachment foundations. On the other hand, a bracing member is disposed obliquely between a frame member disposed on the upper side of the existing building, for example, a beam and either the left or right attached foundation.
By adopting such a configuration, it acts as follows with respect to shaking caused by an earthquake. Here, for example, the case where the bracing members are arranged from the upper left to the lower right as shown in FIG. 23 (a) will be described (of course, the present invention is limited to FIG. 23 (a)). is not). As shown in FIG. 23 (a), the bracing members basically support the force that pushes the building from the left to the right and holds the structure of the building. However, at that time, a force to push the right-side attached foundation outward is applied. However, since the right attached foundation is connected to each other by the left attached foundation engaged with the existing building and the connecting member, the right attached foundation is not pushed outward.

Here, the “attached foundation” may be formed by placing concrete adjacent to the existing foundation at the site, or may be embedded with a precast concrete foundation. The formed metal member may be fixed with an anchor or a bolt. It may be fixed to the foundation or pillar instead of the existing foundation. In short, it is only necessary to be a base on which a bracing member or a connecting member can be attached later.
There is no particular limitation on the shape and material of the “barbed member”, and it may be steel or wood. The shape may be an I-shaped cross section, but it is preferable to have a bent portion such as an L shape, an H shape, or a C shape that is lighter and excellent in bending strength if it is a steel material. It is preferable that the bracing member has the same or higher compressive strength and bending strength as the frame member.

In addition, in the invention according to claim 2, in addition to the configuration of the invention according to claim 1, a leg member extending downward is formed on the brace member, and a lower end of the leg member is connected to the existing building. The gist is that they are brought into contact with a hard surface installed outside.
According to this configuration in addition to the configuration of claim 1, since the leg members extend downward from the bracing member, the building is constructed from right to left as shown in FIG. Since the leg member serves as a support against the force that pushes, the structure of the building can be maintained. Here, the “leg member” may also be a steel material or a wood material, and the shape and number can be appropriately changed.

Further, the gist of the invention described in claim 3 is that, in addition to the configuration of the invention described in claim 2, the hard surface is the upper surface of the attached base on the side where the lower end side of the bracing member is supported.
That is, the attached foundation can be used as it is without preparing a member having a hard surface.

Moreover, in addition to the structure of the invention in any one of Claims 1-3, in the invention of Claim 4, the said attached foundation on which the lower end of the said bracing member is supported is a line segment which connects the said left and right corner parts. The gist of the present invention is that it has an extension portion extending in the direction along the outside and extending outward of the existing building, and the lower end side of the bracing member is supported by the extension portion.
By adopting such a configuration, for example, when the building periphery is standing and the bracing member cannot be attached in space, the lower end of the bracing member is placed in the extended portion separated from the left and right corner portions. The bracing member can be offset outward.
Further, the gist of the invention of claim 5 is that, in addition to the configuration of the invention of any one of claims 1 to 4, the attached foundation has a portion that comes into contact with the corner portion in a hook shape.
That is, the case where it has the contact surface of the L-shaped shape corresponding to the shape of a corner part, for example can be considered. Accordingly, even when some external force is applied to the attached foundation, the attached foundation is less likely to be displaced.

Further, in the invention of claim 6, an attached foundation that engages with the existing building is disposed at any one of the left and right corners of any one surface of the existing building, and is disposed on the upper side of the existing building. In addition, a bracing member is disposed obliquely between the frame member and the attached foundation, and the attached foundation is disposed between the attached foundation and the existing building in substantially the same direction as the bracing member in plan view. The gist of the invention is that a connecting member for restricting movement in the outer direction along the one surface is disposed.
In such a configuration, the attached foundation that engages with the existing building is arranged at either the left or right corner portion of any one surface of the existing building. And the connection member for restrict | limiting that an attachment foundation moves to the outer side along arbitrary one surface is arrange | positioned between the attachment foundation and the existing building in the substantially the same direction as a bracing member. On the other hand, a bracing member is disposed obliquely between a frame member disposed on the upper side of the existing building, for example, a beam and either the left or right attached foundation.
By adopting such a configuration, it acts as follows with respect to shaking caused by an earthquake. Here, for example, the case where the bracing members are arranged from the upper left to the lower right as shown in FIG. 23 (b) will be described (of course, the present invention is limited to FIG. 23 (b)). is not). As shown in FIG. 23 (b), the bracing member basically supports the force that pushes the building from the left to the right and holds the structure of the building. However, the force which pushes an attached foundation outward will be applied in that case. However, since the attached foundation is connected to the existing building by the connecting member, it is not pushed outward. The connecting member is preferably connected to the reverse corner or the vicinity thereof so as to be parallel to the bracing member in plan view as much as possible.
The concepts of “attached foundation” and “muscle bracing member” are the same as in claim 1.

Further, in the invention of claim 7, a distance extending from the existing building in a direction intersecting with a line segment connecting the left and right corner portions and spaced outward from an arbitrary surface of the existing building. An attachment foundation is arranged in a state where movement in the direction of the existing building is restricted by a holding member, and a bracing member is inclined between the frame member disposed on the upper side of the existing building and the attachment foundation. A connecting member that is disposed and that is substantially in the same direction as the bracing member in a plan view and restricts movement between the attached foundation and the existing building in an outward direction along the one surface. The gist of this is that it is arranged.
In such a configuration, the distance holding member that extends from the existing building in a direction that intersects the line segment that connects the left and right corners and that is spaced outward from any one surface of the existing building. Place the attached foundation in a state where movement in the building direction is restricted. At this time, a force acts in a direction in which the attached foundation is drawn toward the existing building, but the auxiliary holding foundation is prevented from being drawn in the direction of the existing building by the spacing member. And the connection member for restrict | limiting that an attachment foundation moves to the outer side along arbitrary one surface is arrange | positioned between the attachment foundation and the existing building in the substantially the same direction as a bracing member. On the other hand, a bracing member is disposed obliquely between a frame member disposed on the upper side of the existing building, for example, a beam and either the left or right attached foundation.
Thereby, for example, the attached foundation can be arbitrarily moved when the surroundings of the building is standing and even one bracing member cannot be attached in space.
The concepts of “attached foundation” and “muscle bracing member” are the same as in claim 1.

Moreover, in addition to the structure of the invention in any one of Claims 1-7, in the invention of Claim 8, the reinforcement member along the side surface of the said existing building is constructed in the said frame member, The said bracing member is the said The gist thereof is that the frame member is disposed via a reinforcing material.
In such a configuration, a frame member arranged on the upper side of the existing building, for example, a plurality of beams and a side surface of the beam, a reinforcing material along the side surface of the existing building is installed, and this reinforcing material is either left or right. A bracing member can be disposed diagonally between the attached foundation. By adopting such a configuration, it is not necessary to use an outwardly projecting member such as an existing beam, and the upper side of the bracing member can be arranged at an arbitrary position of the reinforcing material.

  In the inventions of the above claims, seismic reinforcement is realized even if the existing building is a single bracing member.

The schematic front view which shows only the frame of the existing building of the state which constructed the earthquake-proof reinforcement structure of Embodiment 1 of this invention in the existing building. FIG. 3 is a partially broken cross-sectional view of a part of the existing building that explains the seismic reinforcement structure of the first embodiment. Explanatory drawing explaining the attachment structure of the upper end side of a bracing member in Embodiment 1. FIG. FIG. 3 is a partially enlarged front view illustrating an attachment structure on the upper end side of the brace member in the first embodiment. (A) is the partial expanded front view explaining the attachment structure of the lower end side of a bracing member in the same Embodiment 1, (b) is also a partial expanded side view. In Embodiment 1, (a) is a perspective view of an attached foundation, (b) is also a front view. Explanatory drawing which abbreviate | omits the middle and demonstrates the state which has arrange | positioned the bracing member between the connection metal fitting attached to the beam in Embodiment 1, and the right attachment foundation. FIG. 3 is a plan view of an attached foundation used in the first embodiment. The schematic front view which shows only the frame of the existing building of the state which constructed the earthquake-proof reinforcement structure of Embodiment 2 of this invention in the existing building. The partial expanded side view explaining the attachment structure of the upper end side of a bracing member in the same Embodiment 2. FIG. FIG. 6 is a partially broken cross-sectional view of an existing structure that illustrates the earthquake-proof reinforcement structure of the third embodiment. FIG. 10 is a perspective view of an attached foundation used in the third embodiment. The partial enlarged front view explaining the attachment structure of the lower end side of a bracing member in Embodiment 4. FIG. FIG. 6 is a partially broken cross-sectional view of a part of an existing building that illustrates the seismic reinforcement structure of a fourth embodiment. FIG. 10 is a perspective view of an attached foundation used in the fourth embodiment. The schematic front view which shows only the frame of the existing building of the state which constructed the earthquake-proof reinforcement structure of Embodiment 5 of this invention in the existing building. FIG. 10 is a partially broken cross-sectional view of a part of the existing building that explains the seismic reinforcement structure of the fifth embodiment. FIG. 9 is a partially enlarged plan view illustrating an attachment structure on the upper end side of a brace member in a fifth embodiment. The schematic front view which shows only the frame of the existing building of the state which constructed the earthquake-proof reinforcement structure of Embodiment 6 of this invention in the existing building. FIG. 10 is a partially broken cross-sectional view of a part of an existing building that illustrates the seismic reinforcement structure of a sixth embodiment. FIG. 10 is a perspective view of an attached foundation used in the fifth embodiment. The partial expanded front view of the existing building explaining the earthquake-proof reinforcement structure of other embodiment. (A)-(c) is explanatory drawing which illustrates the principle of this invention typically.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment in which an earthquake-proof reinforcement structure for an existing building according to the present invention is embodied will be described with reference to the drawings.
(Embodiment 1)
As shown in FIG. 1, an existing building H is installed on the fabric foundation 1. In this Embodiment 1, the existing building H is made into the one-story structure built by the conventional construction method. The fabric foundation 1 is made of reinforced concrete. The lower half of the fabric foundation 1 is embedded in the ground (G is the ground surface).
In the first embodiment, the earthquake-proof reinforcement structure of the present invention is applied to one surface of the building H, but it can also be applied to a plurality of surfaces.
As shown in FIG.1 and FIG.2, a pair of attached foundation 2 is embed | buried in the ground of both corner part C1, C2 of the building H. As shown in FIG. As shown in FIGS. 6A and 6B, the attached foundation 2 is a concrete precast block foundation corresponding to the shapes of the corner portions C1 and C2 of the cloth foundation 1. The attached base 2 is a block body configured such that the first and second rectangular parallelepiped portions 2A and 2B having the same shape are abutted in a hook shape at an angle of 90 degrees so as to have a substantially L-shaped planar shape. The inner side surface of the attached base 2 that is bent 90 degrees in a bowl shape is referred to as a contact inner peripheral surface 2a. The tip of the screw rod 4 embedded at the time of molding is protruded from the end surface positions of the first and second rectangular parallelepiped portions 2A and 2B in the attached base 2. The upper surface 2b of the attached base 2 is formed into a flat surface, and two support plates 3 embedded at the time of molding are protruded in a direction perpendicular to the upper surface 2b. Bolt holes 5 are formed in the support plate 3. As shown in FIG. 8, the support plate 3 is disposed on the upper surface 2 b so as to be mirror-image symmetric with respect to the line L. As shown in FIG. 1 and FIG. 2, the attached base 2 is excavated on the outer side of the cloth foundation 1 at both corners C <b> 1 and C <b> 2, and the lower body is buried, and the abutting inner peripheral surface 2 a is brought into contact with the cloth foundation 1. It has been.
As shown in FIG. 2, in the left and right attached foundations 2, a round bar 8 made of a steel material having a circular cross section having screw portions at both ends is disposed between opposite screw rods 4 via turnbuckles 7. The round bar 8 is configured to be slightly shorter than the interval between the screw rods 4 of the left and right attached foundations 2 and is held in a state in which the left and right attached foundations 2 are attracted to each other by the turnbuckle 7.

As shown in FIG. 1, the end portion of the beam 10 of the existing building H projects outward from the outer wall W. In the first embodiment, a connecting metal fitting 11 is attached so as to surround the outer periphery of the beam 10 arranged on the left side in FIG.
The coupling metal 11 is a ring-shaped metal member having an inner circumferential surface having a rectangular cross section substantially matching the outer circumferential shape of the beam 10, and extends rearward at right angles from the upper and lower ends of the front plate 11a and the front plate 11a. The upper and lower plates 11b and 11c, a first back plate 11d hanging from the rear end of the upper plate 11b, and a second back plate 11e standing from the rear end of the lower plate 11c. A pair of upper and lower flange portions 12 projecting outward is formed at the abutting portions of the first and second back plates 11d and 11e. As shown in FIG. 4, bolts (not shown) formed on the flange portion 12 The connecting fitting 11 is fixed to the beam 10 by tightening the flange portion 12 with bolts 13 and nuts 14 through the holes. A substantially semi-circular insertion plate 15 is formed in the center of the front plate 11a of the connection fitting 11. Bolt holes 16 are formed in the insertion plate 15.

As shown in FIG. 1 and FIG. 7, a brace brace 17 is disposed obliquely between the connecting metal fitting 11 attached to the beam 10 and the right side attachment foundation 2. As shown in FIGS. 1 and 5, the brace brace 17 is a steel material bent into a C-shaped cross section, and the opening 17a along the longitudinal direction is arranged to face downward. Bolt holes 18 (not shown on the lower side) are formed on the side surfaces of the brace braces 17 near the upper and lower ends, and as shown in FIG. 3, a slit 19 is formed at the center of the upper end side upper surface (opposite surface of the opening 17a). Is formed. As shown in FIGS. 1, 5 (a) and 5 (b), a leg plate 20 as a leg member is fastened and fixed to the lower part of the brace brace 17 by bolts 21 and nuts 22 so as to extend downward. Yes. The leg plate 20 is attached so as to extend in the vertical direction in accordance with the angle at which the brace brace 17 is disposed obliquely, and the horizontal lower end surface 20a is in close contact with the horizontal upper surface 2b of the attached base 2. To be arranged.
As shown in FIG. 3, the upper end side of the brace brace 17 is joined by inserting the insertion plate 15 of the connecting metal fitting 11 into the slit 19, and the bolt holes 16 and 18 are collated with each other to fix the bolt 23 and the nut 24 as fixing means. Fix by tightening through the washer 25. On the other hand, as shown in FIGS. 5 (a) and 5 (b), the brace brace 17 is arranged on the side surface of the support plate 3 at the lower end side of the brace brace 17, and the bolt holes 5 and 18 are collated with each other to make a bolt 23 and a nut. 24 is fixed by tightening it through a washer 25.

Next, the effect | action of the earthquake-proof reinforcement structure of this Embodiment 1 is demonstrated.
By configuring as described above, the following effects are caused by the earthquake on the existing building H. First, with respect to the force that pushes the building from the left to the right in FIG. 1, the brace 17 basically supports the structure of the existing building H to support it. At this time, a force is applied to push the right-side attached foundation 2 outward. However, the left and right attached foundations 2 are connected to each other by the round bar 8 and the turnbuckle 7, and the left side attached foundation 2 is engaged with the cloth foundation 1 even when the above force is applied, so that the right side attached foundation 2 is engaged. Will not be pushed outward.
On the other hand, the brace 17 does not basically support the force that pushes the building from the right to the left. However, in this case, the leg plate 20 extending downward from the brace brace 17 is in contact with the upper surface 2b as a hard surface, which serves as a support, so that the structure of the building can also be maintained. .
The present invention has the following specific effects by being configured as in the above embodiment. (1) Since it is possible to withstand the force in the left-right direction with only one brace brace 17, the seismic reinforcement structure of the present invention when the surrounding of the existing building H is standing and two braces cannot be disposed By applying, it is possible to reinforce earthquake resistance with only one brace brace 17.
(2) Since the attached foundation 2 corresponds to the shape of the corner portion of the cloth foundation 1, it is difficult to shift laterally, and since it is mirror-image symmetric, even if the inclination direction of the brace brace 17 is reversed, different types of attached foundations are used. It is not necessary to prepare the base plate, and it can be handled with only one type of attached base 2.

(Embodiment 2)
The second embodiment is a modification of the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.
As shown in FIG. 9, in the existing building H of the second embodiment, a horizontal brace 31 as a steel reinforcing material is installed along the outer wall W with respect to the ends of the three beams 10 arranged horizontally. ing. As shown in FIG. 10, the horizontal brace 31 is made of a steel material bent to have a C-shaped cross section. A mounting hole 32 is formed at an arbitrary horizontal position, and a bolt hole near the upper end of the brace brace 17 is formed. 18 is collated with the mounting hole 32, and the bolt 33 and the nut are tightened through the washer 34 to be fixed.
In such a configuration, in addition to the effect of (1) above, the upper end of the brace 17 is brazed to the connection fitting 11 that is set up with respect to the beam 10 as in the first embodiment with the surroundings of the existing building H standing up. This is advantageous when the sides cannot be fixed.

(Embodiment 3)
In Embodiments 1 and 2 described above, the attached foundation 2 of the concrete precast block foundation buried in the ground is used, but the attached foundation 35 made of metal that is not buried in the ground as shown in FIGS. 11 and 12 is used. You may do it. The attached base 35 has a skeleton formed of a main body 35a having a flat upper surface bent in a bowl shape and a wall 35b rising upward from an inner end surface of the main body 35a bent 90 degrees. On the upper surface of the main body 35a, a round bar support plate 37 is fixed for fixing a round bar 36 for connecting the left and right attached foundations 35. A support plate 38 is erected to fix the brace brace 17.
As shown in FIG. 11, the attached foundation 35 is fixed to the corner portions C <b> 1 and C <b> 2 of the cloth foundation 1 by a hole-in anchor 39. The left and right attached foundations 35 are connected by a round bar 36. The round bar 36 is fixed to the round bar support plate 37 of each attached base 35 with a nut 40. Then, the lower end side of the brace brace 17 is fixed to the support plate 38. At this time, the lower end surface 20 a of the leg plate 20 of the brace brace 17 is brought into contact with the main body 35 a of the attached foundation 35.
Even with such a configuration, the same effect as (1) of the first embodiment is obtained. Moreover, it is not necessary to excavate to embed the attached foundation 2 as in the first and second embodiments, thereby reducing costs and working time.

(Embodiment 4)
As shown in FIGS. 13 and 14, the attachment base 41 arranged in the corner portion C <b> 1 is configured to be extremely long (or configured to have a long portion), and the surface on which the bracing brace 17 is disposed is formed. The support plate 3 may be arranged at a position away from the extended outside existing building H. The attached foundation 41 according to the fourth embodiment is a precast block foundation made of concrete having a rectangular parallelepiped shape as shown in FIG. The left attached base 2 and the attached base 41 are connected by a round bar 8 connected via a turnbuckle 7 as in the first embodiment. By using such an attached foundation 41, it is possible to arrange the brace brace 17 at the position where the lower end side of the brace brace 17 is offset from the corner portion C1.
By configuring in this way, the same effect as in the first embodiment (1) can be obtained, and the margin of the brace brace 17 can be more increased, so even if the surroundings of the existing building H are standing upright The brace brace 17 can be installed.

(Embodiment 5)
The fifth embodiment is also a modification of the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.
As shown in FIGS. 16 and 17, the attached foundation 51 on either the left or right corner (here, the corner C1) side is opposed to one surface of the building H where the bracing members are arranged (front side in FIG. 16). It may be arranged at a position separated from the building H.
The attached foundation 51 is a concrete precast block foundation and is embedded in the soil. The attached foundation 51 and the cloth foundation 1 of the existing building H are connected by a gap holding brace 52 made of an L-shaped steel material as a gap holding member. The upper surface 51a of the attached foundation 51 is formed in a flat surface, and one support plate 53 embedded at the time of molding is protruded in a direction perpendicular to the upper surface 51a. The support plate 53 is bracing and the brace 54 is disposed between the support plate 53 and the beam 10. As shown in FIGS. 17 and 18, since the attached foundation 51 is separated from the building H, the brace brace 54 is arranged obliquely not only in the front view but also in the plan view unlike the first to fourth embodiments. It is installed. The angle θ with the straight line connecting the left and right corner portions C1, C2 of the brace brace 54 varies depending on the distance from the building H and the distance from the corner portion C1 of the attached foundation 51.

As shown in FIGS. 16 to 18, a bracket 55 is formed on the upper end side of the brace brace 54. A plurality of types of brackets 55 are prepared according to the angle θ. A contact surface 55 a on the beam 10 side of the bracket 55 is formed in parallel with the outer surface of the beam 10. The brace brace 54 is fixed to the beam 10 by fastening a screw bolt 56 via a bracket 55. On the other hand, the brace brace 54 is fixed to the lower end side by arranging the brace brace 54 on the side surface of the support plate 53 and tightening the bolt 23 and the nut 24 via the washer 25 as in the first to fourth embodiments. .
A metal accessory base 57 as shown in FIG. 21 is fixed by a hole-in anchor 58 to the corner portion C2 opposite to the corner portion C1. The attached base 57 has a skeleton formed by a main body 57a having a flat upper surface bent in a bowl shape and a wall portion 57b rising upward from an inner end surface of the main body 57a bent by 90 degrees. An arm 60 to which the screw rod 4 is welded is rotatably attached to the upper surface of the main body 57a. In the left and right attached foundations 51, 57, a round bar 8 made of a steel material having a circular cross section having screw portions at both ends is disposed between the opposing screw bars 4 via a turnbuckle 7.
In such a configuration, in addition to the effect of (1) above, the upper end of the brace 17 is brazed to the connection fitting 11 that is set up with respect to the beam 10 as in the first embodiment with the surroundings of the existing building H standing up. This is advantageous when the sides cannot be fixed.
In the fifth embodiment, the brace brace 54 is fixed by a plurality of fixing means such as bolts 23 and 56 (three locations on the upper end side and the lower end side) at each of the upper and lower fixing positions. It will have sufficient proof strength for the moment.

(Embodiment 6)
The sixth embodiment is a variation of the fifth embodiment. As shown in FIGS. 19 and 20, the attached foundation 51 is moved from the corner portion C1 toward the center. In the fifth embodiment, the metal accessory foundation 57 is disposed only in the corner portion C2, but in the sixth embodiment, the metal accessory foundation 57 is disposed in the corner portions C1 and C2 on both sides. And in the attachment base 51 of a center position, and the attachment base 57 of right and left, the round bar 8 which consists of a steel material with a circular cross section which has a thread part at both ends via the turnbuckle 7 between the screw rods 4 which oppose each other is arrange | positioned. Yes. In this way, by connecting the attached foundation 51 with the screw rod 4, the turnbuckle 7, and the round bar 8 as connecting members from the left and right directions, the attached foundation 51 is more firmly held at the embedded position against the force from the left and right directions. The Rukoto.

It should be noted that the present invention can be modified and embodied as follows.
-You may make it construct an attachment foundation by assembling a concrete with a reinforcing bar in the field as attachment foundation 2.
-In Embodiment 4, if the lower end side of the brace brace 17 can be offset from the corner part C1, it will not be limited to the said shape.
In Embodiment 1, the connecting brace 11 that fixes the upper end side of the brace brace 17 may be attached to another beam 10 so that the brace brace 17 is disposed at different angles.
The shapes of the attached foundations 2 and 51 and the connecting metal fitting 11 are examples, and can be implemented in other shapes.
In the above-described embodiment as the connecting member, for example, a round bar 8 made of a steel material having a circular cross section having screw portions at both ends via the turnbuckle 7 between the opposing screw rods 4 is arranged. You may make it connect with another member (for example, L-shaped steel materials and H-shaped steel materials).
-The brace brace 17 may be on either the left or right side.
Embodiment The attached foundation 51 in Embodiment 5 may be made of metal. Conversely, the metal accessory foundation 57 may be made of concrete.
In the first embodiment, for example, the connecting member is disposed between the left and right attached foundations 2. Thus, even if it does not arrange | position a connection member between attachment foundations, the structure which arrange | positions between the attachment foundation to which the lower end side of a bracing member is fixed, and the existing building H (it is not limited to the cloth foundation 1) May be adopted.
The metal attachment foundation may be fixed to the base 59 instead of the cloth foundation 1 as shown in FIG. Moreover, you may make it fix to structures other than the fabric foundation 1 and the base 59. FIG.
The horizontal brace 31 as the reinforcing material of the second embodiment can be applied to the fifth and sixth embodiments.
The leg plate 20 as the leg member of the first embodiment can be applied to the fifth and sixth embodiments.
-Besides, it is free to implement in a mode that does not depart from the gist of the present invention.

  2, 35, 41, 51, attached base, 2 b, upper surface as a hard surface, 7, turnbuckle that forms part of the connecting member, 8, round bar that forms part of the connecting member, 10, beam as a frame member , 17, 54 ... Brace brace as a brace member, 20 ... Leg plate as a leg member, 31 ... Horizontal brace as a reinforcing material, C1, C2 ... Corner part, H ... Existing building.

Claims (8)

A pair of left and right attached foundations that engage with the existing building are arranged at the left and right corners of an arbitrary surface of the existing building, and the movement of the attached foundations in the separating direction is restricted between the two attached foundations. While providing a connecting member for
A seismic reinforcement structure for an existing building, wherein a bracing member is arranged obliquely between a frame member arranged on the upper side of the existing building and either the left or right attached foundation. 2. A leg member extending downward is formed on the bracing member, and a lower end of the leg member is brought into contact with a hard surface installed outside the existing building. Seismic reinforcement structure for existing buildings as described in. The seismic reinforcement structure for an existing building according to claim 2, wherein the hard surface is an upper surface of an attached foundation on a side where a lower end side of the bracing member is supported. The attached foundation on which the lower end of the bracing member is supported has a portion extending in a direction along a line connecting the left and right corner portions and extending outward of the existing building, The seismic reinforcement structure for an existing building according to any one of claims 1 to 3, wherein a lower end side of the bracing member is supported by the extended portion. The seismic reinforcement structure for an existing building according to any one of claims 1 to 4, wherein the attached foundation has a portion that comes into contact with the corner portion in a hook shape. An attached foundation that engages with the existing building is arranged at any one of the left and right corners of one surface of the existing building, and the frame member disposed on the upper side of the existing building and the attached foundation A bracing member is disposed diagonally between the bracing members in a plan view and substantially in the same direction as the bracing member, and the adjoining foundation is in an outer direction along the arbitrary surface between the attached foundation and the existing building. An anti-seismic reinforcing structure for an existing building, characterized in that a connecting member for restricting the movement to the center is arranged. A direction intersecting with a line segment connecting the left and right corner portions, and toward the existing building by a spacing member extending from the existing building to a position spaced outward from any one surface of the existing building An attachment foundation is arranged in a state where movement of the attachment is restricted, and a bracing member is arranged obliquely between the frame member arranged on the upper side of the existing building and the attachment foundation, and in plan view, A connecting member for restricting movement in the outer direction along the one arbitrary surface is arranged between the attached foundation and the existing building in substantially the same direction as the brace member. A seismic reinforcement structure for existing buildings. 8. The structure according to claim 1, wherein a reinforcing material is installed on the frame member along a side surface of the existing building, and the bracing member is disposed on the frame member via the reinforcing material. Seismic reinforcement structure for existing buildings as described in.

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