JP6265676B2 - Steel shear wall - Google Patents

Description

  The present invention relates to a steel earthquake resistant wall.

  An earthquake-proof repair method for attaching a steel earthquake-resistant wall to a frame surrounding an outer wall is known (see, for example, Patent Document 1).

JP 2010-121383 A

  However, the technique disclosed in Patent Document 1 has room for improvement in the following points. That is, since the steel seismic wall is installed on the inner side (inside the room) of the outer wall, the indoor space may be reduced. Moreover, since a steel earthquake-resistant wall is joined with an outer wall, the deformation performance of a steel earthquake-resistant wall may fall.

  In view of the above facts, an object of the present invention is to obtain a steel earthquake-resistant wall that can suppress deterioration in deformation performance without changing the indoor space.

The steel seismic wall according to the first aspect is a steel plate wall disposed on the outer surface side of the outer wall provided between the upper and lower beams, in contact with the outer surface or with a gap, and the steel plate wall as the upper and lower beams. And a joining member for joining each of them.

According to the first aspect of the invention, the steel plate wall is disposed on the outer surface side of the outer wall and is joined to the upper and lower beams by the joining member. Therefore, compared with the structure which arrange | positions a steel plate wall in the inner surface side of an outer wall, indoor space does not become narrow.

  Further, the steel plate wall is disposed in contact with the outer surface of the outer wall or with a gap. That is, the horizontal edge of the steel plate wall and the outer wall is cut. Thereby, since a steel plate wall is not restrained by an outer wall at the time of an earthquake, the fall of the deformation performance of a steel plate wall can be suppressed.

The steel earthquake resistant wall according to the second aspect is the steel earthquake resistant wall according to the first aspect , wherein the steel plate wall has a corrugated plate-like portion and a flat plate-like portion arranged in the vertical direction.

According to the second aspect of the invention, the steel plate wall has the corrugated plate portion and the flat plate portion arranged in the vertical direction.

  Here, the corrugated portion is formed, for example, in a cross-sectional corrugated shape, and the shear rigidity is lower than that of the flat plate portion. That is, the corrugated portion is excellent in deformation performance. By using such a corrugated portion, the deformation performance of the steel plate wall can be improved.

  On the other hand, for example, if only the corrugated portion is formed on the steel plate wall, the shear rigidity of the steel plate wall may be too low. On the other hand, in this invention, the shear rigidity of a steel plate wall can be easily raised by combining a waveform part and a flat plate part.

The steel earthquake-resistant wall according to the third aspect is the steel earthquake-resistant wall according to the first aspect or the second aspect , wherein an outer wall opening is formed in the outer wall, and an opening facing the outer wall opening is formed in the steel plate wall. The part is formed.

According to the invention relating to the third aspect , the steel plate wall is formed with an opening facing the outer wall opening formed in the outer wall. Thereby, a steel earthquake-resistant wall can be installed on the outer surface side of the outer wall without blocking the outer wall opening of the outer wall. Therefore, the seismic performance of the structure can be improved while ensuring viewability, daylighting, ventilation and the like.

  As described above, according to the steel shear wall according to the present invention, it is possible to suppress the deterioration of the deformation performance without changing the indoor space.

It is the elevation which looked at the structure where the steel earthquake proof wall which concerns on one Embodiment of this invention was attached to the outer wall from the outer side. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3A is a cross-sectional view taken along line 3-3 in FIG. 1, and FIG. 3B is a partially enlarged cross-sectional view of FIG. It is an elevational view corresponding to FIG. 1 which shows the modification of the steel earthquake-resistant wall which concerns on one Embodiment of this invention. It is a perspective view which shows the state which attached the veranda to the steel earthquake-resistant wall which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view which shows the veranda shown by FIG.

  Hereinafter, a steel earthquake resistant wall according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3A, the steel earthquake resistant wall 10 according to the present embodiment is attached to the outer surface 12A of the outer wall 12 of an existing structure by post-construction, for example. The outer wall 12 is provided in a frame composed of upper and lower beams 14 (see FIG. 2) and left and right columns 16 (see FIG. 3A). In the present embodiment, the outer surfaces 12A, 14A, and 16A of the outer wall 12, the beam 14, and the column 16 are substantially flush.

  As shown in FIG. 1, the steel earthquake resistant wall 10 is formed in a substantially rectangular frame shape when viewed from the front, and an opening 20 is formed at the center thereof. The steel seismic wall 10 is arranged with the opening 20 facing the outer wall opening 18 so as not to block the rectangular outer wall opening 18 formed on the outer wall 12 of the structure.

  In the present embodiment, the opening 20 is larger than the outer wall opening 18, but the opening 20 may be smaller than the outer wall opening 18. Further, the outer wall opening 18 is not limited to a rectangular shape, and may be, for example, a circular shape.

  The steel seismic wall 10 includes a pair of steel plate walls 30 disposed on both the left and right sides of the outer wall opening 18, and a pair of upper connecting portions 60 and a lower connection disposed on both upper and lower sides of the outer wall opening 18. Part 62. The steel plate wall 30 has a wall portion 30B, an upper joint portion 30A and a lower joint portion 30C provided above and below the wall portion 30B, spans the upper and lower beams 14 (see FIG. 2), and includes left and right pillars. 16 (see FIG. 3A).

  The wall 30B has a corrugated steel plate 32 and a stiffness adjusting plate 34 arranged in the vertical direction. The corrugated steel plate 32 as the corrugated plate portion absorbs seismic energy by resisting horizontal force while shearing during an earthquake or yielding and drawing a hysteresis loop. The corrugated steel plate 32 is formed in a cross-sectional corrugated shape, and has a shear rigidity lower than that of the flat plate-like stiffness adjusting plate 34. That is, the corrugated steel plate 32 is superior in deformation performance (toughness) compared to the stiffness adjusting plate 34.

  The corrugated steel plate 32 is disposed on both sides of the opening 20 with the crease being lateral (horizontal direction). The corrugated steel plate 32 may be arranged with the crease line in the vertical direction (vertical direction). Further, vertical flanges 36 are joined to the left and right ends of the corrugated steel plate 32 by welding or the like. Further, the horizontal flange 38 is joined to the upper and lower ends of the corrugated steel plate 32 by welding or the like. The vertical flange 36 is provided across the upper joint portion 30 </ b> A and the lower joint portion 30 </ b> C, and the upper and lower end portions are joined to the horizontal flange 40 that forms the outer peripheral frame of the steel plate wall 30. The outer peripheral frame of the steel plate wall 30 is formed by the vertical flange 36 and the horizontal flange 40.

  A rigidity adjusting plate 34 is joined to the lower end portion of the corrugated steel plate 32 via a lateral flange 38 by welding or the like. The stiffness adjusting plate 34 is formed of a flat steel plate and has a shear rigidity higher than that of the corrugated steel plate 32. By changing the ratio of the stiffness adjusting plate 34 and the corrugated steel plate 32, the shear stiffness of the wall portion 30B is adjusted. The stiffness adjusting plate 34 is formed integrally with the surface plate 50 of the lower joint portion 30C. A lateral flange 42 is disposed between the wall 30 and a lower joint 30C described later.

  Here, if it supplements about the wall part 30, the magnitude | size and number of the rigidity adjustment board 34 and the corrugated steel plate 32 can be changed suitably. Further, the wall 30B may be formed by only the corrugated steel plate 32 without the rigidity adjusting plate 34, and conversely, the wall 30B may be formed by only the rigidity adjusting plate 34 by omitting the corrugated steel plate 32. You may do it. In the present embodiment, the rigidity adjusting plate 34 and the surface plate 50 are integrally formed, but may be formed separately.

  The upper joint portion 30 </ b> A includes a frame portion 44 surrounded by the vertical flange 36 and the horizontal flanges 38 and 40, and a surface plate 46 that closes the frame portion 44. Similarly, the lower joint portion 30 </ b> C includes a frame portion 48 surrounded by the vertical flange 36 and the horizontal flanges 40 and 42, and a surface plate 50 that closes the frame portion 48.

  As shown in FIG. 2, the upper joint portion 30 </ b> A is disposed to face the outer surface 14 </ b> A of the upper beam 14, and the lower joint portion 30 </ b> C is disposed to face the outer surface 14 </ b> A of the lower beam 14. . In addition, since 30 A of upper side junction parts and 30 C of lower side junction parts are the same structures, hereafter, upper side junction part 30A is demonstrated and description of 30 C of lower side junction parts is abbreviate | omitted.

  The surface plate 46 is joined to an edge portion on the outer side (opposite side to the outer wall 12) of the frame portion 44. As shown in FIG. 3B, a plurality of headed studs 52 as a shearing force transmission member project from the back surface of the front plate 46.

  On the other hand, a plurality of anchor members 54 serving as shear force transmitting members are embedded in the outer surface 14A of the upper beam 14. The anchor member 54 is, for example, an adhesive anchor. By integrating the headed stud 52 and the anchor member 54 with a filler 56 such as concrete filled in the frame portion 44, the upper joint portion 30A can transmit shearing force to the outer surface 14A of the beam 14. It is joined.

  In the present embodiment, the headed stud 52, the anchor member 54, and the filler 56 are used as the joining members, but the present invention is not limited to this. Various studs, anchors, deformed reinforcing bars and the like can be used for the shear force transmission member. The filler 56 is not limited to concrete, and mortar, grout, adhesive, or the like can be used. Further, for example, the upper joint portion 30A may be joined to the outer surface 14A of the beam 14 by a cap nut and a bolt embedded in the outer surface 14A of the beam 14.

  As shown in FIG. 1, the upper connection portion 60 connects the upper joint portions 30 </ b> A of the pair of steel plate walls 30, and the lower connection portion 62 connects the lower joint portions 30 </ b> C of the pair of steel plate walls 30. Are connected. As shown in FIGS. 3A and 3B, the upper connecting portion 60 has the same configuration as that of the upper joint portion 30A, and includes a headed stud 52, an anchor member 54, and a filler 56. The outer surface 14A of the upper beam 14 is connected to be able to transmit a shearing force. The same applies to the lower connecting portion 62. The upper connection portion 60 and the lower connection portion 62 increase the degree of fixation (bonding strength) of the upper joint portion 30A and the lower joint portion 30C with respect to the outer wall 12.

  Note that stiffening ribs 66 are appropriately provided on the surface plates 64 of the upper connecting portion 60 and the lower connecting portion 62. Further, the surface plate 64 of the lower connection portion 62 also connects the rigidity adjusting plates 34 of the pair of steel plate walls 30 to each other.

  Here, as shown in FIG. 2, the steel plate wall 30 is attached to the outer wall 12 with a gap S between the wall portion 30 </ b> B and the outer wall 12. That is, the outer wall 12 and the wall portion 30 </ b> B have a horizontal edge cut. Thereby, the wall part 30B is not restrained by the outer wall 12 at the time of an earthquake.

  In addition, in this embodiment, although the clearance gap S was opened between the wall part 30B and the outer wall 12, it is not restricted to this. The wall 30B and the outer wall 12 only need to have horizontal edges cut off. For example, the wall 30B may be brought into contact (surface touch) with the outer surface 12A of the outer wall 12. Moreover, you may provide finishing materials, such as an aluminum panel, on the surface of the steel earthquake-resistant wall 10, for example.

  Next, the operation of this embodiment will be described.

  For an earthquake or the like, a horizontal force is transmitted to the steel shear wall 10 through the upper and lower beams 14. Thereby, wall part 30B of a pair of steel plate wall 30 resists a horizontal force, carrying out shear deformation. In addition, when the corrugated steel plate 32 is designed to yield with respect to a horizontal force, the corrugated steel plate 32 yields and draws a hysteresis loop to absorb vibration energy. Therefore, the vibration of the structure is reduced.

  Here, as shown in FIG. 2, the steel earthquake-resistant wall 10 is disposed on the outer surface 12 </ b> A side (outdoor) of the outer wall 12. Therefore, compared with the case where the steel earthquake-resistant wall 10 is disposed on the inner surface side (indoor side) of the outer wall 12, the indoor space is not narrowed. Moreover, the steel seismic wall 10 can be constructed while continuously using the indoor space.

  The steel earthquake-resistant wall 10 is formed with an opening 20 facing the outer wall opening 18 of the outer wall 12. Thereby, the steel earthquake resistant wall 10 can be attached to the outer wall 12 without blocking the outer wall opening 18 of the outer wall 12. Therefore, the seismic performance of the structure can be improved while ensuring viewability, daylighting, ventilation and the like.

  Furthermore, since the steel earthquake-resistant wall 10 can be made thinner than the RC earthquake-resistant wall, the protruding amount of the steel earthquake-resistant wall 10 protruding from the outer surface 12A of the outer wall 12 can be reduced. Therefore, the influence on the appearance of the structure can be reduced. In addition to this, for example, by finishing the outer surface of the steel earthquake-resistant wall 10 with a finishing material such as an aluminum panel, the design can be improved.

  Further, the wall portions 30 </ b> B of the pair of steel plate walls 30 are disposed with a gap S between the outer surface 12 </ b> A of the outer wall 12. That is, the edge in the horizontal direction is cut between the wall portion 30B and the outer wall 12. Therefore, since the wall part 30B is not restrained by the outer wall 12 at the time of an earthquake, the fall of the deformation performance of the steel plate wall 30 is suppressed.

  Furthermore, in this embodiment, the corrugated steel plate 32 is provided on the wall 30B. The corrugated steel plate 32 is formed in a cross-sectional corrugated shape, has lower shear stiffness than the stiffness adjusting plate 34, and is excellent in deformation performance (toughness). By using such a corrugated steel plate 32, the deformation performance of the steel plate wall 30 can be improved.

  On the other hand, since the corrugated steel plate 32 is excellent in deformation performance as described above, if the wall portion 30B is formed only of the corrugated steel plate 32, the shear rigidity of the wall portion 30B may be too low depending on the design conditions (burden proof stress). In such a case, it is possible to adjust the shear rigidity by changing the plate thickness or cross-sectional shape (for example, wave wavelength or amplitude) of the corrugated steel plate 32, but this requires cost to manufacture the corrugated steel plate 32. .

  On the other hand, in the wall portion 30 </ b> B of the present embodiment, the corrugated steel plate 32 and the stiffness adjusting plate 34 having higher shear rigidity than the corrugated steel plate 32 are arranged side by side in the vertical direction. By combining the rigidity adjusting plate 34 and the corrugated steel plate 32, the shear rigidity of the wall 30B can be easily increased. Therefore, since the standardized corrugated steel plate 32 can be used, the manufacturing cost of the corrugated steel plate 32 can be reduced.

  Next, a modification of the above embodiment will be described.

  In the said embodiment, although the example which connected a pair of steel plate wall 30 by the upper side connection part 60 and the lower side connection part 62 was shown, it does not restrict to this. For example, as shown in FIG. 4, the steel seismic walls 10 may be disposed on both sides of the outer wall opening 18. In this case, the steel earthquake resistant wall 10 can be disposed without blocking the outer wall opening 18 as in the above embodiment. The steel earthquake resistant wall 10 can be attached to the outer surface 12A of the outer wall 12 of the structure regardless of the outer wall opening 18.

  Moreover, in the said embodiment, although the upper side joining part 30A and the lower side joining part 30C of the steel earthquake-resistant wall 10 were shown joined to the outer surface 14A of the upper and lower beams 14, it is not restricted to this. For example, when the beam type of the upper and lower beams 14 protrudes outward with respect to the outer surface 12A of the outer wall 12, a steel earthquake resistant wall 10 is installed between the upper and lower beams 14, and the lower surface of the upper beam 14 is disposed. While joining the upper end part of the wall part 30B, you may join the lower end part of the wall part 30B to the upper surface of a lower beam. In this case, the wall 30B and the upper and lower beams 14 may be joined by a joining member such as a stud, an anchor member, or a bolt.

  The steel earthquake resistant wall 10 can also be used as a base material for a veranda 70 attached around the outer wall opening 18 as shown in FIG. 5, for example. Specifically, as shown in FIG. 6, a skeleton material 72 such as H-shaped steel constituting the skeleton of the veranda 70 may be joined to the steel earthquake resistant wall 10 by bolts, welding, or the like. In this case, since the attachment of the frame material to the outer wall 12 becomes easy, the workability of the veranda 70 is improved.

  In FIG. 5, a finishing material 68 such as an aluminum panel is attached to the surface of the steel earthquake resistant wall 10, but the finishing material 68 can be omitted. Moreover, you may use the steel earthquake-resistant wall 10 as a base material of the frame | skeleton material which comprises not only the veranda 70 but the protruding structure of the balcony which protrudes from the outer wall 12, or a terrace.

  Moreover, in the said embodiment, although the outer wall 12 is RC structure and the upper and lower beams 14 and the right and left pillar 16 are RC structure or SRC structure, it is not restricted to this. The outer wall 12 may be, for example, various types of outer wall boards, and the upper and lower beams 14 and the left and right columns 16 may be, for example, steel structures.

  Furthermore, in the said embodiment, although the example which attached the steel earthquake-resistant wall 10 to the outer surface 12A of the outer wall 12 of the existing structure was shown, it does not restrict to this. The steel shear wall 10 can be attached to the outer surface of the outer wall of a newly built structure.

  As mentioned above, although one embodiment of the present invention was described, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in combination as appropriate, and the gist of the present invention will be described. Of course, various embodiments can be implemented without departing from the scope.

DESCRIPTION OF SYMBOLS 10 Steel earthquake-resistant wall 12 Outer wall 12A Outer surface 14 Beam 18 Outer wall opening 20 Opening 30 Steel plate wall 30B Wall 32 Corrugated steel plate (corrugated plate-like part)
34 Stiffness adjustment plate (flat steel plate)
52 Stud with head (joining member)
54 Anchor member (joining member)
56 Filler (joining member)

Claims (4)

Is spaced contact or gap between the outer surface on the outer surface of the outer wall which is provided above and below the Harima, and the steel plate walls which are not joined to the outer wall,
Joining members for joining the steel plate walls to the upper and lower beams, respectively.
Steel shear wall with On the outer surface side of the outer wall provided between the upper and lower beams, a steel plate wall disposed with a gap from the outer surface;
Joining members for joining the steel plate walls to the outer surfaces of the upper and lower beams,
Steel shear wall with On the outer surface side of the outer wall provided between the upper and lower beams, a steel plate wall disposed in contact with the outer surface or with a gap therebetween,
Joining members for joining the steel plate walls to the upper and lower beams, respectively.
With
The steel plate wall has a corrugated plate portion and a flat plate portion arranged in the vertical direction.
Steel shear wall. On the outer surface side of the outer wall provided between the upper and lower beams, a steel plate wall disposed in contact with the outer surface or with a gap therebetween,
Joining members for joining the steel plate walls to the upper and lower beams, respectively.
With
The outer wall is formed with an outer wall opening,
The steel plate wall is formed with an opening facing the outer wall opening,
Steel shear wall.

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