JP2017150225A - Earthquake-resistance reinforcement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce influence imparted to an external appearance of a building, by reinforcing only a lacking part of earthquake-resistance.SOLUTION: An earthquake-resistance reinforcement structure 20 comprises a beam reinforcement member 32 having a first plate-like part (a plate-like part 34) adhered to a side surface 14A of a beam 14 arranged on a building outer peripheral surface (an outer peripheral surface 16A) and a first flange part (a flange part 36) projected from the first plate-like part and a column reinforcement member 22 having a second plate-like part (a plate-like part 24) adhered to a side surface 12A of a column 12 arranged on the building outer peripheral surface and a second flange part (a flange part 26) projected from the second plate-like part and joining an end part (an upper end 26A) to the beam reinforcement member 32.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seismic reinforcement structure.

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

JP2013-87540A

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

  In consideration of the above facts, an object of the present invention is to reinforce only the portion where the earthquake resistance is insufficient and to reduce the influence on the exterior of the building.

  The seismic reinforcement structure according to claim 1 includes a first plate-like portion bonded to a side surface of the beam disposed on the outer peripheral surface of the building, and a first flange portion protruding from the first plate-like portion. A reinforcing member; a second plate-like portion bonded to a side surface of a pillar disposed on the outer peripheral surface of the building; and a second flange portion protruding from the second plate-like portion, and an end portion of the beam And a column reinforcing member joined to the reinforcing member.

  According to the seismic reinforcement structure of claim 1, the beam and the column of the building are reinforced by the beam reinforcement member and the column reinforcement member, respectively. Moreover, since a beam reinforcement member and a column reinforcement member are each provided with a 1st flange part and a 2nd flange part, compared with the structure which is not provided with a flange part, rigidity is high. Furthermore, it becomes a ramen structure by joining the edge part of a column reinforcement member and a beam reinforcement member, and can improve the earthquake resistance performance of a building.

  In addition, since the beam reinforcing member and the column reinforcing member are bonded and fixed to the beam and the column, respectively, it is not necessary to start up from the foundation provided on the ground. For this reason, for example, in the case where only the intermediate layer is insufficient in the earthquake resistance, only the intermediate layer can be seismically reinforced.

  Furthermore, since the beam reinforcement member and the column reinforcement member are bonded to the beam and the column, respectively, there are few protrusions from the outer peripheral surface of the building compared to an earthquake-resistant reinforcement structure that attaches an out frame to the outside of the building, for example. There is little influence.

  The seismic reinforcement structure according to claim 2 is the seismic reinforcement structure according to claim 1, wherein a lower end portion of the column reinforcement member penetrates a slab protruding from the outer peripheral surface of the building and is bonded to a beam on a lower floor. It is joined with a beam reinforcing member or a column reinforcing member bonded to a column on the lower floor.

  According to the seismic reinforcement structure of claim 2, the upper and lower ends of the column reinforcement member are joined to the beam reinforcement member. For this reason, the building is seismically reinforced by a reinforcing material having a ramen structure connected in the vertical direction. Therefore, the earthquake resistance performance of the building can be further improved.

  The seismic reinforcing structure according to claim 3 is the seismic reinforcing structure according to claim 1 or 2, wherein the beam reinforcing member is a channel steel in which the first flange portion protrudes from both ends of the first plate-like portion. The column reinforcing member is a grooved steel in which the second flange portion protrudes from both ends of the second plate-like portion.

  According to the seismic reinforcement structure of claim 3, the beam reinforcement member and the column reinforcement member are channel steel. For this reason, rigidity is high compared with the case where CT shape steel (so-called cut T) and angle steel are used, for example. For this reason, the seismic performance of the housing can be further improved.

  According to the seismic reinforcement structure according to the present invention, it is possible to reinforce only the portion where the seismic resistance is insufficient and to reduce the influence on the exterior of the building.

It is the top view which showed the building where the earthquake-proof reinforcement structure which concerns on 1st Embodiment of this invention was applied. It is the front view which showed the building where the earthquake-proof reinforcement structure which concerns on 1st Embodiment of this invention was applied. (A) is a vertical sectional view showing a beam reinforcing member and a column reinforcing member in the seismic reinforcing structure according to the first embodiment of the present invention, and (B) is a plan sectional view. (A) is a vertical sectional view showing a beam reinforcing member and a column reinforcing member in the seismic reinforcing structure according to the second embodiment of the present invention, (B) is a plan sectional view, (C) is a beam reinforcing member and It is a partial enlarged view which shows a junction part with a column reinforcement member. It is the front view which showed the state where the beam reinforcement member and the column reinforcement member in the earthquake-proof reinforcement structure concerning 3rd Embodiment of this invention were applied to the building where a slab does not jump out from an outer peripheral surface. (A) is a standing view showing a state in which the beam reinforcing member and the column reinforcing member in the seismic reinforcing structure according to the fourth embodiment of the present invention are applied to the inside of the column and the reverse beam provided on the outdoor side of the balcony slab. It is a top view, (B) is the BB sectional drawing of (A). The modification of the seismic reinforcement structure which concerns on 1st Embodiment of this invention is shown, (A) is the elevation which showed the state by which the beam reinforcement member and the column reinforcement member were arrange | positioned in zigzag form, (B ) Is an elevational view showing a state in which the beam reinforcing member and the column reinforcing member are arranged in only one layer.

[First Embodiment]
(building)
As shown in FIG. 1, a building 10 to which the seismic reinforcement structure 20 of the first embodiment is applied is a collective housing of 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 beam 14. 18 is jumping out. The side surface 14A of the beam 14, the side surface 12A of the column 12, and the outer peripheral surface 16A of the building 10 are the same surface.

(Seismic reinforcement structure)
FIG. 2 is a front view including a partial cross section indicated by the line AA in FIG. As shown in FIG. 2, the seismic reinforcement structure 20 includes a beam reinforcement member 32 provided along the outdoor side surface 14 </ b> A of the beam 14 and a column reinforcement member provided along the outdoor side surface 12 </ b> A of the column 12. 22 and a beam reinforcing rib 42 provided at a joint portion between the column reinforcing member 22 and the beam reinforcing member 32, and a plurality of adjacent dwelling units R across a plurality of layers of the building 10. It is installed across.

(Beam reinforcement member)
As shown in FIG. 3A, the beam reinforcing member 32 includes a plate-like portion 34 fixed to the side surface 14A of the beam 14 using an epoxy resin adhesive G and a bolt 50, and an outer side from the plate-like portion 34. It is a channel steel provided with a pair of flange portions 36 projecting (outdoor side). The flange portion 36 of the beam reinforcing member 32 has a protruding height larger 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 the plurality of dwelling units R, and is a through member at a joint portion with the column reinforcing member 22. Between the flange portions 36 of the beam reinforcing member 32, beam reinforcing ribs 42 are welded on the extension line of the flange portion 26 of the column reinforcing member 22.

  A heat insulating material (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 NAD paint (non-aqueous dispersion paint) is fitted.

  In the present embodiment, the beam reinforcing member 32 is manufactured by welding the flat plate-like 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 reinforcing member)
As shown in FIG. 3B, the column reinforcing member 22 includes a plate-like portion 24 fixed to the side surface 12A of the column 12 using an adhesive G and a bolt 50, and an outer side (outdoor side) from the plate-like portion 24. It is a grooved steel provided with a pair of flange portions 26 projecting from each other. A heat insulating material (not shown) is sprayed between the flange portions 26 of the column reinforcing member 22 and outside. The flange portion 26 is entirely covered with a calcium silicate covering plate 28 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 the extension line of the center line L of the door boundary wall 52 is appropriately attached via a frame material. In FIG. 1 and FIG. 2, the covering plate 28, the partition plate 54, and the bolt 50 are omitted for easy understanding of the configuration of the seismic reinforcement structure 20. In addition, anchor nuts for fixing the bolts 50 are embedded in the pillars 12 and the beams 14, but are omitted in FIGS. 3A and 3B.

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

  A root wound concrete 56 is cast on the through hole 18A and the upper part of the through hole 18A using a mold (not shown) to cover the lower end of the flange portion 26. Further, the surface of the root wound concrete 56 is provided with a waterproof coating film continuous from the surface of the slab 18. As a result, the fixing force of the lower end 26B of the flange portion 26 is increased, and rainwater is prevented from flowing down to the balcony on the lower floor through the through hole 18A.

(Function and effect)
In the seismic reinforcement structure 20 of the present embodiment, the upper end 26A 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 lower end 26B passes through the through hole 18A formed in the slab 18, It is welded to the flange portion 66 of the beam reinforcing member 62 on the lower floor. As a result, the building 10 is seismically reinforced by the reinforcing member that is connected in the vertical direction to have a ramen structure. For this reason, high earthquake resistance is obtained.

  In the seismic reinforcement structure 20, the column reinforcing member 22 and the beam reinforcing member 32 are fixed to the column 12 and the beam 14 by the adhesive G and the bolt 50, respectively. For this reason, compared with the case where it fixes only with the volt | bolt 50, for example, fixing force is large, and it is not necessary to stand up and support the column reinforcement member 22 and the beam reinforcement member 32 from the foundation provided in the ground. For this reason, for example, in the case where only the intermediate layer is insufficient in the earthquake resistance, only the intermediate layer can be seismically reinforced.

  Moreover, in the seismic reinforcement structure 20, the column reinforcement member 22 and the beam reinforcement member 32 are attached to the side surfaces 12A and 14A on the outside of the column 12 and the beam 14, respectively. For this reason, the work inside the dwelling unit R does not occur during the seismic reinforcement work. For this reason, compared with the case where a fiber reinforcement is wound around the perimeter of a pillar, for example, it has less influence on a resident's life. Moreover, there are few structures which block sunlight, compared with the earthquake-proof reinforcement structure which attaches the out-frame, brace, etc. which protruded outside the building, for example. For this reason, the impact on the comfortability before and after the renovation is small.

  Note that the bolt 50 is not necessarily used as long as the necessary fixing force can be obtained simply by 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.

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. The embodiment of the present invention is 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 not necessarily welded to the flange portion 66 of the lower beam reinforcing member 62. There is no need.
Even in such an embodiment, the column 12 and the beam 14 are reinforced by the column reinforcing member 22 and the beam reinforcing member 32, respectively, so that the earthquake resistance performance of the building 10 can be enhanced.

[Second Embodiment]
Next, the earthquake-proof reinforcement structure 70 which concerns on 2nd Embodiment of this invention is demonstrated. In addition, about the structure same as 1st Embodiment, description is abbreviate | omitted as using the same code | symbol.

(building)
As shown in FIG. 4B, the building 11 according to this embodiment is a collective housing with a column beam structure including columns 13 and beams 15. Further, in the building 11, the side surface 13 </ b> A of the column 13 protrudes outward (outside) from the side surface 15 </ b> A of the beam 15.

(Seismic reinforcement structure)
FIG. 4A shows an elevational cross-sectional view taken along line AA in FIG. 4B. As shown in FIG. 4A, the seismic reinforcement structure 70 is provided along the column reinforcing member 72 provided along the outdoor side surface 13A of the column 13 and the outdoor side surface 15A of the beam 15. And a beam reinforcing member 82.

(Column reinforcing member)
As shown in FIG. 4B, the column reinforcing member 72 includes a plate-like portion 74 fixed to the side surface 13A of the column 13 using an adhesive G and a bolt 50, and a side surface 13B of the column 13 from the plate-like portion 74. The grooved steel is provided with a pair of flange portions 76 projecting inward (indoor side) along the side surface 13B and fixed with the side surface 13B and the adhesive G.

  As shown in FIG. 4A, the lower end 76B of the flange portion 76 passes through the 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 reinforcement member)
As shown in FIG. 4A, the beam reinforcing member 82 includes a plate-like portion 84 fixed to the side surface 15A of the beam 15 using an adhesive G and a bolt 50, and an outer side (outdoor side) from the plate-like portion 84. The grooved steel is provided with a pair of flange portions 86 projecting from each other. As shown in FIG. 4C, the end portion 86 B of the flange portion 86 of the beam reinforcing member 82 and the end portion 84 B of the plate-like portion 84 are welded to the flange portion 76 of the column reinforcing member 72.

(Function and effect)
In the seismic reinforcement 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 it is compared with the case of protruding outward (outside). To save space. Further, the influence on the appearance of the building 11 can be reduced. Furthermore, by adhering 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 reinforcement structure 100 in the third embodiment is applied to the outer peripheral surface of a building that does not include a balcony slab. In 3rd Embodiment, since the lower end 26B of the flange part 26 of the column reinforcement member 22 is welded to the flange part 66 of the beam reinforcement member 62 of the lower floor without penetrating a balcony slab, installation of the column reinforcement member 22 is carried out. Construction is easier compared to the first embodiment.

[Fourth Embodiment]
As shown in FIGS. 6 (A) and 6 (B), the seismic reinforcement structure 110 in the fourth embodiment is an inverted beam out frame in which an inverted beam 102 is installed on a column 104 provided on the outdoor side of the balcony slab 19. Applied to construction buildings. In the fourth embodiment, the beam reinforcing member 32 is bonded to the inner side of the reverse beam 102, and the column reinforcing member 22 is bonded to the inner side of the column 104. Further, 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 passing through the through hole 19A of the balcony slab 19 is connected to the beam reinforcing member 112 on the upper floor. Weld to the flange 116. As a result, the earthquake-proof repair can be performed without changing the appearance of the building.

  Thus, the building to which the seismic reinforcement structure of the present invention is applied is the building 10 having the inner frame structure in which the columns 12 and the beams 14 protrude to the indoor side of the dwelling unit R in the first embodiment, or the second embodiment. The form 13 is not limited to the building 11 having an out-frame structure in which the pillars 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 26B of the flange portion 26 of the column reinforcing member 22 passes through the through hole 18A of the slab 18, and the flange of the beam reinforcing member 62 below the slab 18 is provided. Although it shall be welded to the part 66, embodiment of this invention is not restricted to this. For example, a rib is formed on the upper surface of the flange portion 66 of the beam reinforcing member 62, this rib is inserted into the through hole 18 </ b> A from below and protruded upward of the slab 18, and the upper end of the rib and the flange portion 26 of the column reinforcing member 22 are formed. The lower end 26 </ b> B may be welded above the slab 18. In this way, since it is not necessary to insert a welding tool into the through hole 18A, the through hole 18A can be made small.

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

  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 portion 26 of the column reinforcing member 22 is welded to the flange portion 36 of the beam reinforcing member 32. However, the embodiment of the present invention is not limited to this. For example, the column reinforcing member 22 may be a through member at the joint portion with the beam reinforcing member 32, and the end of the flange portion 36 of the beam reinforcing member 32 may be welded to the flange portion 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.

  Moreover, although the earthquake-proof reinforcement structure 20 in 1st Embodiment shall be arrange | positioned ranging over the several layer of the building 10 and adjacent several dwelling units R, embodiment of this invention is restricted to this. I can't. For example, as shown in FIG. 7 (A), the beam reinforcement structure may be arranged in a staggered pattern on the outer peripheral surface of the building, or may be arranged in only one layer as shown in FIG. 7 (B). Alternatively, a frame straddling a plurality of layers may be configured in which the beam reinforcing members are arranged only in the uppermost layer and the lowermost layer of the plurality of layers and the beam reinforcing members are connected by the column reinforcing members. Thereby, only the part with insufficient earthquake resistance can be selected and seismic strengthened.

  Further, the beam reinforcing member 32 of the seismic reinforcing structure 20 in the first embodiment is provided with two flange portions 36, and the column reinforcing member 22 is also a grooved steel provided with two flange portions 26 in the same manner. The embodiment of the present invention is not limited to this. For example, one flange portion may be provided, or three or more flange portions may be provided. If the number of the flange portions is one, the beam reinforcing member or the column reinforcing member can be easily manufactured as compared with the case of two flange portions. Further, if the number of flange portions is three or more, the earthquake resistance can be further improved.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment, You may use combining one embodiment and various modifications suitably.

16A, 17A outer peripheral surface (building outer peripheral surface)
12, 13 Column 12A, 13A Side (side of column)
14, 15 Beam 14A, 15A Side (side of beam)
18 Slab 22 Column reinforcement member 24 Plate part (second plate part)
26 Flange (second flange)
26A Upper end (end)
26B Lower end (lower end)
32 beam reinforcing member 34 plate-like part (first plate-like part)
36 Flange (first flange)

Claims (3)

A beam reinforcing member comprising: a first plate-like portion bonded to a side surface of a beam disposed on the outer peripheral surface of the building; and a first flange portion protruding from the first plate-like portion;
A second plate-like portion bonded to a side surface of a pillar disposed on the outer peripheral surface of the building; and a second flange portion protruding from the second plate-like portion, and an end portion joined to the beam reinforcing member Column reinforcement members made,
Seismic reinforcement structure with   The lower end portion of the column reinforcing member passes through the slab jumped out from the outer peripheral surface of the building, and is joined to the beam reinforcing member bonded to the beam on the lower floor or the column reinforcing member bonded to the column on the lower floor, The earthquake-proof reinforcement structure according to claim 1. The beam reinforcing member is a groove steel in which the first flange portion protrudes from both ends of the first plate-like portion,
The seismic reinforcement structure according to claim 1 or 2, wherein the column reinforcing member is a grooved steel in which the second flange portion protrudes from both ends of the second plate-like portion.