JP6674278B2 - Seismic reinforcement structure - Google Patents

Description

  The present invention relates to an earthquake-resistant reinforcement structure.

  Patent Literature 1 below discloses an out-frame reinforcement structure in which a frame frame is attached to an outer shell of an existing building as an earthquake-resistant reinforcement structure of the existing building.

JP 2013-87540 A

  However, according to the out-frame reinforcement structure of Patent Document 1, since the out-frame is raised from the foundation provided on the ground, for example, even when only the intermediate layer is seismically reinforced, the out-frame must be raised from the foundation to the intermediate layer. Must. In addition, since the out frame is attached so as to protrude greatly from the outer wall of the existing building, the appearance of the building changes greatly before and after the seismic reinforcement.

  The present invention has been made in view of the above circumstances, and has an object to reinforce only a portion where earthquake resistance is insufficient to reduce the influence on the appearance of a building.

2. The seismic retrofit structure according to claim 1, wherein the first plate portion is directly fixed to a side surface of the beam provided on the outer peripheral surface of the building with an adhesive , and the first flange portion protrudes from the first plate portion. A second plate-shaped portion directly fixed to a side surface of a pillar provided on the outer peripheral surface of the building using an adhesive , and a second plate-shaped member protruding from the second plate-shaped portion. And a column reinforcing member having an upper end joined to the beam reinforcing member to form a rigid frame structure .

  According to the seismic retrofit structure of the first aspect, the beam and the column of the building are reinforced by the beam reinforcing member and the column reinforcing member, respectively. Further, since the beam reinforcing member and the column reinforcing member include the first flange portion and the second flange portion, respectively, the rigidity is higher than that of the configuration not including the flange portion. Furthermore, by joining the end portion of the column reinforcing member and the beam reinforcing member, a rigid frame structure is obtained, and the seismic performance of the building can be improved.

  Further, since the beam reinforcing member and the column reinforcing member are bonded and fixed to the beam and the column, respectively, there is no need to start up from the foundation provided on the ground. For this reason, for example, when only the middle layer has a portion where the earthquake resistance is insufficient, it is possible to reinforce only the middle layer.

Furthermore, since the beam reinforcing member and the column reinforcing member are bonded to the beam and the column, respectively, compared to, for example, an earthquake-resistant reinforcing structure in which an out-frame is attached to the outside of the building, there is less protrusion from the building outer peripheral surface, and the appearance of the building is reduced. Has little effect.
3. The seismic retrofit structure according to claim 2, wherein the first plate-shaped portion is directly fixed to a side surface of the beam provided on the outer peripheral surface of the building with an adhesive, and the first flange portion protrudes from the first plate-shaped portion. A second plate-shaped portion directly fixed to a side surface of a pillar provided on the outer peripheral surface of the building using an adhesive, and a second plate-shaped member protruding from the second plate-shaped portion. And a column reinforcing member having an end portion of the beam reinforcing member joined to the second flange portion to form a rigid frame structure.

In the aseismic reinforcement structure according to claim 3, in the aseismic reinforcement structure according to claim 1, a lower end portion of the column reinforcing member penetrates a slab that protrudes from the outer peripheral surface of the building, and applies an adhesive to a beam on a lower floor. It is joined with the beam reinforcing member directly fixed by using .

According to the third embodiment, the upper and lower ends of the column reinforcing member are joined to the beam reinforcing member. For this reason, the building is seismically reinforced by a reinforcing material having a rigid-frame structure connected vertically. Therefore, the seismic performance of the building can be further improved.
The seismic retrofit structure according to claim 4 is the seismic retrofit structure according to claim 2, wherein the lower end portion of the column reinforcing member penetrates a slab that has protruded from the outer peripheral surface of the building, and an adhesive is applied to the column on the lower floor. It is joined with the column reinforcing member directly fixed by using.
According to a fifth aspect of the present invention, in the aseismic reinforcement structure according to the third or fourth aspect, only the first flange portion of the column reinforcing member penetrates the slab.

The aseismic reinforcement structure according to claim 5 is the aseismic reinforcement structure according to any one of claims 1 to 5 , wherein the beam reinforcing member is configured such that the first flange portion extends from both ends of the first plate-shaped portion. The column reinforcing member is a channel steel having the second flange portion protruding from both ends of the second plate-shaped portion.

According to the seismic retrofit structure of claim 5 , the beam reinforcing member and the column reinforcing member are channel steel. For this reason, the rigidity is higher than, for example, the case where a CT section steel (a so-called cut T) or an angle steel is used. For this reason, the seismic performance of the frame can be further improved.

  ADVANTAGE OF THE INVENTION According to the earthquake-resistant reinforcement structure which concerns on this invention, it can reinforce only the part which lacks earthquake resistance, and can reduce the influence which gives to the external appearance of a building.

1 is a plan view showing a building to which a seismic retrofit structure according to a first embodiment of the present invention is applied. 1 is a front view showing a building to which an earthquake-resistant reinforcement structure according to a first embodiment of the present invention is applied. (A) is an elevation sectional view showing a beam reinforcement member and a column reinforcement member in the earthquake-resistant reinforcement structure according to the first embodiment of the present invention, and (B) is a plan sectional view. (A) is an elevation sectional view showing a beam reinforcement member and a column reinforcement member in the earthquake-resistant reinforcement structure according to the second embodiment of the present invention, (B) is a plan sectional view, and (C) is a beam reinforcement member. It is the elements on larger scale which show the joint part with a column reinforcement member. It is a front view showing the state where the beam reinforcement member and the column reinforcement member in the earthquake-resistant reinforcement structure concerning a 3rd embodiment of the present invention were applied to the building where a slab does not protrude from an outer peripheral surface. (A) shows a state in which the beam reinforcing member and the column reinforcing member in the seismic retrofitting structure according to the fourth embodiment of the present invention are applied to the inside of columns and inverted beams provided on the outdoor side of the balcony slab. It is a front view, (B) is BB sectional drawing of (A). FIG. 4A is a view illustrating a modification of the earthquake-resistant reinforcement structure according to the first embodiment of the present invention, and FIG. 5A is an elevation view illustrating a state in which beam reinforcement members and column reinforcement members are arranged in a staggered manner; () Is an elevational view showing a state in which the beam reinforcing members and the column reinforcing members are arranged in only one layer.

[First Embodiment]
(building)
As shown in FIG. 1, a building 10 to which the seismic retrofit structure 20 of the first embodiment is applied is a multi-story housing with a column-beam structure including columns 12 and beams 14, and a slab of a balcony from a side surface 14 </ b> A of the beams 14. 18 are jumping out. The side surface 14A of the beam 14, the side surface 12A of the pillar 12, and the outer peripheral surface 16A of the building 10 are the same.

(Seismic reinforcement structure)
FIG. 2 is a front view including a partial cross section taken along line AA of FIG. As shown in FIG. 2, the seismic retrofit structure 20 includes a beam reinforcing member 32 provided along the outdoor side surface 14A of the beam 14 and a column reinforcing member provided along the outdoor side surface 12A of the column 12. 22 and beam reinforcing ribs 42 provided at the joints between the column reinforcing members 22 and the beam reinforcing members 32, and are provided over a plurality of layers of the building 10 and on a plurality of adjacent dwelling units R adjacent to each other. It is installed straddling.

(Beam reinforcing members)
As shown in FIG. 3A, the beam reinforcing member 32 includes a plate-shaped portion 34 fixed to the side surface 14 </ b> A of the beam 14 using an adhesive G made of epoxy resin and a bolt 50, and an outer side from the plate-shaped portion 34. (Outdoor side) and a pair of flange portions 36. The projecting height of the flange portion 36 of the beam reinforcing member 32 is greater than the flange portion 26 of the column reinforcing member 22 described later.

  As shown in FIGS. 1 and 2, the beam reinforcing member 32 extends over a plurality of dwelling units R and is a through member at a joint with the column reinforcing member 22. A beam reinforcing rib 42 is welded between the flange portions 36 of the beam reinforcing member 32 on an extension of the flange portion 26 of the column reinforcing member 22.

  A heat insulator (not shown) is sprayed between the flange portions 36 of the beam reinforcing member 32. Between the upper and lower flange portions 36, a cover plate 38 made of calcium silicate coated with a NAD paint (non-aqueous dispersion paint) is fitted.

  In the present embodiment, the beam reinforcing member 32 is manufactured by welding the flat plate-shaped portion 34 and the flange portion 36, but the embodiment of the present invention is not limited to this, and may be manufactured by rolling or bending. Good. The same applies to a column reinforcing member 22 described later.

(Column reinforcement members)
As shown in FIG. 3B, the column reinforcing member 22 includes a plate-shaped portion 24 fixed to the side surface 12 </ b> A of the column 12 using an adhesive G and a bolt 50, and the outside (outdoor side) from the plate-shaped portion 24. And a channel steel having a pair of flange portions 26 protruding therefrom. A heat insulating material (not shown) is sprayed between and outside the flange portions 26 of the column reinforcing member 22. Further, the entire flange portion 26 is covered with a cover plate 28 made of calcium silicate to which a waterproof multilayer coating material is applied.

  On the cover plate 28, a partition plate 54 that partitions the balcony of the adjacent dwelling unit R on an extension of the center line L of the door wall 52 is attached via a frame material as appropriate. 1 and 2, the cover plate 28, the partition plate 54, and the bolt 50 are omitted for easy understanding of the configuration of the earthquake-resistant reinforcement structure 20. An anchor nut for fixing the bolt 50 is embedded in the column 12 and the beam 14, but this is omitted in FIGS. 3A and 3B.

  As shown in FIG. 3A, the upper end 26 </ b> A of the flange 26 of the column reinforcing member 22 is welded to the flange 36 of the beam reinforcing member 32. Further, the lower end 26B of the flange portion 26 passes through a through hole 18A formed in the slab 18, and is welded to the flange portion 66 of the beam reinforcing member 62 on the lower floor. As shown in FIG. 3B, the through hole 18A has a size large enough to insert a tool for welding the lower end 26B of the flange 26 to the flange 66 from above the slab 18. Shall be.

  A root-mound concrete 56 is cast into the through-hole 18A and an upper portion of the through-hole 18A using a mold (not shown), and covers the lower end of the flange portion 26. In addition, the surface of the root-mound concrete 56 is provided with a waterproof coating which is continuous from the surface of the slab 18. Thereby, the fixing force of the lower end 26B of the flange portion 26 is increased, and the rainwater is prevented from flowing down to the balcony on the lower floor through the through hole 18A.

(Action and effect)
In the seismic retrofit structure 20 of the present embodiment, the upper end 26A of the flange 26 of the column reinforcing member 22 is welded to the flange 36 of the beam reinforcing member 32, and the lower end 26B passes through a through hole 18A formed in the slab 18, It is welded to the flange 66 of the beam reinforcing member 62 on the lower floor. As a result, the building 10 is seismically reinforced by the reinforcing members that are vertically connected and have a ramen structure. Therefore, high seismic performance can be obtained.

  Further, in the earthquake-resistant reinforcing structure 20, the column reinforcing members 22 and the beam reinforcing members 32 are fixed to the columns 12 and the beams 14, respectively, by the adhesive G and the bolts 50. For this reason, for example, the fixing force is large as compared with the case of fixing with only the bolt 50, and the column reinforcing member 22 and the beam reinforcing member 32 do not need to be raised from the foundation provided on the ground and supported. For this reason, for example, when only the middle layer has a portion where the earthquake resistance is insufficient, it is possible to reinforce only the middle layer.

  In the aseismic reinforcement structure 20, the column reinforcement member 22 and the beam reinforcement member 32 are attached to the outer side surfaces 12A and 14A of the column 12 and the beam 14, respectively. Therefore, no work is performed inside the dwelling unit R during the seismic retrofitting work. For this reason, the impact on the resident's life is small compared to, for example, a case in which a fiber reinforcing material is wound around the entire circumference of the pillar for seismic reinforcement. Also, there are fewer structures that block solar radiation, for example, as compared to seismic retrofit structures that attach outframes, braces, or the like that protrude outside the building. Therefore, the impact on habitability before and after the renovation is small.

  It should be noted that the bolt 50 need not always be used as long as the necessary fixing force can be obtained only by making contact with the adhesive. If the bolt 50 is not used, the construction efficiency of the column reinforcing member 22 and the beam reinforcing member 32 is improved.

Further, in the present embodiment, the lower end 26B of the flange portion 26 of the column reinforcing member 22 passes through the through hole 18A formed in the slab 18, and is welded to the flange portion 66 of the beam reinforcing member 62 on the lower floor. However, embodiments of the present invention are not limited to this. For example, the lower end 26B of the flange portion 26 may be disposed above the slab 18 without forming the through hole 18A, and the lower end 26B of the flange portion 26 is necessarily welded to the flange portion 66 of the lower beam reinforcing member 62. No need.
Even in such an embodiment, the columns 12 and the beams 14 are reinforced by the column reinforcing members 22 and the beam reinforcing members 32, respectively, so that the earthquake resistance of the building 10 can be improved.

[Second embodiment]
Next, an earthquake-resistant reinforcement structure 70 according to a second embodiment of the present invention will be described. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

(building)
As shown in FIG. 4B, the building 11 of the present embodiment is a multi-dwelling house having a column and beam structure including columns 13 and beams 15. In the building 11, the side surface 13A of the pillar 13 protrudes outward (outdoor side) from the side surface 15A of the beam 15.

(Seismic reinforcement structure)
FIG. 4A is a vertical sectional view taken along line AA of FIG. 4B. As shown in FIG. 4A, the seismic retrofit structure 70 is provided along the column side reinforcing member 72 provided along the outdoor side surface 13 </ b> A of the column 13, and along the outdoor side surface 15 </ b> A of the beam 15. And a beam reinforcing member 82.

(Column reinforcement members)
As shown in FIG. 4B, the column reinforcing member 72 includes a plate-shaped portion 74 fixed to the side surface 13A of the column 13 using an adhesive G and a bolt 50, and the side surface 13B of the column 13 from the plate-shaped portion 74. Along the inner side (indoor side) along with a pair of flange portions 76 fixed to the side surface 13B and the adhesive G.

  As shown in FIG. 4A, the lower end 76B of the flange portion 76 passes through a through hole 18A formed in the slab 18, and is welded to the upper end 96B of the flange portion 96 of the column reinforcing member 92 on the lower floor.

(Beam reinforcing members)
As shown in FIG. 4A, the beam reinforcing member 82 includes a plate-shaped portion 84 fixed to the side surface 15A of the beam 15 using an adhesive G and bolts 50, and an outer side (outdoor side) from the plate-shaped portion 84. The grooved steel is provided with a pair of flanges 86 protruding from the groove. As shown in FIG. 4C, an end portion 86B of the flange portion 86 of the beam reinforcing member 82 and an end portion 84B of the plate portion 84 are welded to the flange portion 76 of the column reinforcing member 72.

(Action and effect)
In the seismic retrofit structure 70 of the present embodiment, the flange portion 76 of the column reinforcing member 72 protrudes inward (indoor side) along the side surface 13B of the column 13, so that the flange portion 76 protrudes outward (outdoor side). Space saving. Further, the influence on the appearance of the building 11 can be reduced. Further, by bonding the flange portion 76 to the side surface 13B of the column 13, the restraining effect of the column 13 can be enhanced, and the seismic performance can be improved.

[Third embodiment]
As shown in FIG. 5, the seismic retrofit structure 100 according to the third embodiment is applied to the outer peripheral surface of a building without a balcony slab. In the third embodiment, since the lower end 26B of the flange portion 26 of the column reinforcing member 22 is welded to the flange portion 66 of the beam reinforcing member 62 on the lower floor without penetrating the balcony slab, the column reinforcing member 22 is installed. Construction is easier than in the first embodiment.

[Fourth embodiment]
As shown in FIGS. 6A and 6B, the seismic retrofit structure 110 according to the fourth embodiment has a reverse beam out frame in which a reverse beam 102 is erected on a pillar 104 provided on the outdoor side of a balcony slab 19. Applies to structural buildings. In the fourth embodiment, the beam reinforcing member 32 adheres to the inside of the inverted beam 102, and the column reinforcing member 22 adheres to the inside of the column 104. In addition, the lower end 26B of the flange portion 26 of the column reinforcing member 22 is welded to the flange portion 36 of the beam reinforcing member 32, and the upper end 26A of the flange portion 26 that has passed through the through hole 19A of the balcony slab 19 is connected to the beam reinforcing member 112 on the upper floor. To the flange 116. As a result, seismic retrofitting can be performed without changing the appearance of the building.

  As described above, the building to which the earthquake-resistant reinforcement structure of the present invention is applied includes the building 10 having the inner frame structure in which the columns 12 and the beams 14 protrude toward the indoor side of the dwelling unit R in the first embodiment, and the second embodiment. The embodiment is not limited to the building 11 having the out-frame structure in which the columns 13 and the beams 15 protrude to the outdoor side of the dwelling unit R.

[Modification]
Next, a modification of the above embodiment will be described. In the first embodiment, as shown in FIG. 3A, the lower end 26 </ b> B of the flange 26 of the column reinforcing member 22 passes through the through hole 18 </ b> A of the slab 18, and the flange of the beam reinforcing member 62 below the slab 18. Although it is assumed that it is welded to the portion 66, embodiments of the present invention are not limited to this. For example, a rib is formed on the upper surface of the flange portion 66 of the beam reinforcing member 62, and this rib is inserted into the through hole 18A from below to protrude above the slab 18, and the upper end of the rib and the flange portion 26 of the column reinforcing member 22 are formed. May be welded above the slab 18. By doing so, it is not necessary to insert a tool for welding into the through hole 18A, so that the through hole 18A can be made smaller.

  In the first embodiment, only the flange portion 26 of the column reinforcing member 22 is welded to the flange portion 66 of the beam reinforcing member 62 on the lower floor through the through hole 18A of the slab 18. Embodiments are not limited to this. For example, a through hole larger than the through hole 18 </ b> A may be formed, and the plate portion 24 may be made to penetrate the through hole and welded to the plate portion 64. Thereby, seismic strength can be increased.

  In the first embodiment, the beam reinforcing member 32 is a through member at the joint with the column reinforcing member 22, and the upper end 26 </ b> A of the flange 26 of the column reinforcing member 22 is welded to the flange 36 of the beam reinforcing member 32. However, embodiments of the present invention are not limited to this. For example, the column reinforcing member 22 may be a through member at a joint with the beam reinforcing member 32, and the end of the flange 36 of the beam reinforcing member 32 may be welded to the flange 26 of the column reinforcing member 22. In this case, the upper and lower ends of the column reinforcing member 22 are butt-welded to each other and fixed.

  In addition, the seismic retrofit structure 20 according to the first embodiment is arranged over a plurality of layers of the building 10 and over a plurality of adjacent dwelling units R, but the embodiment of the present invention is not limited to this. I can't. For example, as shown in FIG. 7A, the beam reinforcing structures may be arranged in a staggered manner on the outer peripheral surface of the building, or may be arranged in only one layer as shown in FIG. 7B. Alternatively, a frame extending over a plurality of layers may be configured in which beam reinforcing members are arranged only on the uppermost layer and the lowermost layer of the plurality of layers, and the beam reinforcing members are connected by column reinforcing members. As a result, it is possible to select only a portion where the quake resistance is insufficient and strengthen the quake resistance.

  Further, the beam reinforcing member 32 of the earthquake-resistant reinforcing structure 20 in the first embodiment has two flanges 36, and the column reinforcing member 22 is also a channel steel having two flanges 26 similarly. However, embodiments of the present invention are not limited to this. For example, one flange portion may be provided, or three or more flange portions may be provided. If one flange portion is used, it is easier to manufacture a beam reinforcing member or a column reinforcing member than in the case of two flange portions. When three or more flange portions are used, the seismic performance can be further improved.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and one embodiment and various modifications may be appropriately combined and used.

16A, 17A Outer peripheral surface (Building outer peripheral surface)
12, 13 Pillar 12A, 13A Side (side of pillar)
14, 15 Beam 14A, 15A Side (side of beam)
18 Slab 22 Column reinforcing member 24 Plate portion (second plate portion)
26 Flange (2nd flange)
26A Upper end (end)
26B Lower end (lower end)
32 beam reinforcing member 34 plate-shaped part (first plate-shaped part)
36 Flange (first flange)

Claims (6)

A beam reinforcing member including a first plate-shaped portion directly fixed to a side surface of a beam provided on an outer peripheral surface of the building using an adhesive , and a first flange portion protruding from the first plate-shaped portion; ,
Comprises a second plate-like portion fixed directly with an adhesive on a side of the disposed in a building outer peripheral surface pillar, a second flange portion projecting from the second plate-shaped portion, the upper end is the A column reinforcing member joined to the beam reinforcing member to form a rigid frame structure ;
Seismic reinforcement structure with A beam reinforcing member including a first plate-shaped portion directly fixed to a side surface of a beam provided on an outer peripheral surface of the building using an adhesive , and a first flange portion protruding from the first plate-shaped portion; ,
Comprises a second plate-like portion fixed directly with an adhesive on a side of the disposed in a building outer peripheral surface pillar, a second flange portion projecting from the second plate-shaped portion, the second and the bar reinforcing member to form a rigid frame structure are joined the ends of the front Kihari reinforcing member to the flange portion,
Seismic reinforcement structure with The lower end of the pillar reinforcement member extends through the slab Hanedashi from the building outer peripheral surface, is bonded directly fixed beam reinforcement member with an adhesive to the underlying floor beam, according to claim 1 Seismic reinforcement structure. The lower end of the pillar reinforcement member, said slab Hanedashi the building outer peripheral surface penetrates, joined directly fixed pillar reinforcing member using an adhesive pillar below Sokai to claim 2 The seismic retrofit structure described. The seismic retrofit structure according to claim 3 or 4, wherein only the first flange portion of the column reinforcing member penetrates the slab . The beam reinforcing member is a channel steel in which the first flange portion protrudes from both ends of the first plate-shaped portion,
The earthquake-resistant reinforcement structure according to any one of claims 1 to 5, wherein the column reinforcing member is a channel steel in which the second flange portion protrudes from both ends of the second plate-shaped portion.