JP6960207B2 - Fireproof structure of steel shear wall - Google Patents

Description

The present invention relates to a fireproof structure of a steel shear wall.

A steel seismic wall is known that includes a corrugated steel sheet and a face material that is laminated on one side of the corrugated steel sheet and forms a closed space between a plurality of valleys (recesses) in the corrugated steel sheet (for example, a patent). Reference 1).

Japanese Unexamined Patent Publication No. 2010-007393

By the way, when the steel earthquake-resistant wall also functions as a fire-resistant partition wall, for example, a fire-resistant board such as gypsum board is installed on one side of the steel earthquake-resistant wall.

However, installation (construction) of a refractory board or the like may take time and effort.

In consideration of the above facts, an object of the present invention is to provide a fireproof structure of a steel earthquake-resistant wall that is easy to construct.

The fire-resistant structure of the steel earthquake-resistant wall according to the first aspect includes a steel earthquake-resistant wall attached to a frame having a pair of columns and upper and lower horizontal members erected on the pair of columns, and the steel earthquake-resistant wall. It is provided with a one-sided fire-resistant coating portion which covers one side of the above with fire-resistant coating along the one-sided surface.

According to the fireproof structure of the steel earthquake-resistant wall according to the first aspect , the one-sided fireproof coating portion covers one side of the steel earthquake-resistant wall with fireproof coating along the one side. As a result, the steel earthquake-resistant wall is provided with fire resistance. Therefore, for example, a steel earthquake-resistant wall can function not only as an earthquake-resistant wall but also as a fire-resistant partition wall.

Further, by performing fireproof coating on only one side of the steel earthquake-resistant wall with a fireproof coating portion on one side, workability is improved as compared with the case where both sides of the steel earthquake-resistant wall are fireproof coated.

The fire-resistant structure of the steel earthquake-resistant wall according to the second aspect is the flange portion provided on the outer peripheral portion of the steel earthquake-resistant wall and joined to the frame in the fire-resistant structure of the steel earthquake-resistant wall according to the first aspect. Both sides of the flange portion are provided with a fireproof coating on both sides.

According to the fire-resistant structure of the steel earthquake-resistant wall according to the second aspect , a flange portion to be joined to the frame is provided on the outer peripheral portion of the steel earthquake-resistant wall. Both sides of this flange portion are fireproof coated by the fireproof coatings on both sides. As a result, fire resistance is imparted to the flange portion. Therefore, for example, the steel earthquake-resistant wall from falling off from the frame in the event of a fire is suppressed.

The fire-resistant structure of the steel earthquake-resistant wall according to the third aspect is attached to the steel earthquake-resistant wall and formed on the steel earthquake-resistant wall in the fire-resistant structure of the steel earthquake-resistant wall according to the first or second aspect. It is provided with a fire door that opens and closes the opening, and an opening-side fire-resistant coating that covers the inner peripheral surface of the opening with fire resistance.

According to the fire-resistant structure of the steel earthquake-resistant wall according to the third aspect , the steel earthquake-resistant wall is equipped with a fire door that opens and closes an opening formed in the steel earthquake-resistant wall. Further, the inner peripheral surface of the opening is fire-resistant coated by the opening-side fire-resistant coating. As a result, a steel earthquake-resistant wall can be installed in the evacuation route. Therefore, the versatility of the steel shear wall is improved.

As described above, the present invention can provide a fireproof structure of a steel earthquake-resistant wall that is easy to construct.

It is an elevation view (front view) which looked at the steel earthquake-resistant wall which concerns on one Embodiment from the front side. It is a cross-sectional view taken along the line 2-2 of FIG. FIG. 3 is a cross-sectional view taken along the line 3-3 of FIG. It is a cross-sectional view of line 4-4 of FIG. (A) is a cross-sectional view taken along the line 5A-5A of FIG. 1, and (B) is a cross-sectional view corresponding to FIG. 5 (A) showing a modified example of the stiffening rib. (A) is a cross-sectional view corresponding to FIG. 2 showing a modified example of the steel earthquake-resistant wall according to one embodiment, and (B) is a cross-sectional view corresponding to FIG. (A) is an enlarged elevational view corresponding to FIG. 1 showing a modified example of the steel earthquake-resistant wall according to one embodiment, and (B) is a sectional view taken along line 7B-7B of FIG. 7 (A). .. It is sectional drawing corresponding to FIG. 7B which shows the deformation example of the steel earthquake-resistant wall which concerns on one Embodiment. It is sectional drawing corresponding to FIG. 7B which shows the deformation example of the steel earthquake-resistant wall which concerns on one Embodiment. (A) is an enlarged elevational view corresponding to FIG. 1 showing a modified example of the steel earthquake-resistant wall according to one embodiment, and (B) is a cross-sectional view taken along the line 10B-10B of FIG. 10 (A). ..

Hereinafter, the fire-resistant structure of the steel earthquake-resistant wall according to the embodiment of the present invention will be described with reference to the drawings. The arrow W shown in each figure indicates the width direction of the steel earthquake-resistant wall, and the arrow P indicates the out-of-plane direction of the steel earthquake-resistant wall (wall body).

FIG. 1 shows a steel earthquake-resistant wall 20 to which the fire-resistant structure 10 of the steel earthquake-resistant wall according to the present embodiment is applied. The steel earthquake-resistant wall 20 is attached to the steel frame frame 12. The frame 12 is a rigid frame frame having a pair of columns 14 and a pair of upper beams 16U and lower beams 16L erected on the pair of columns 14.

In the present embodiment, the pair of columns 14 (steel columns) are formed of square steel pipes, but the pair of columns 14 may be formed of, for example, round steel pipes or H-shaped steel. Further, in the present embodiment, the upper and lower upper beams 16U and lower beams 16L (steel beams) are formed of H-shaped steel, but the upper and lower upper beams 16U and lower beams 16L are, for example, I-shaped steel and C-shaped steel. , It may be formed of a square steel pipe or the like.

The steel earthquake-resistant wall 20 is a corrugated steel plate earthquake-resistant wall. Specifically, the steel earthquake-resistant wall 20 has a wall body 22 and an outer peripheral frame 32 provided on the outer peripheral portion of the wall body 22. The wall body 22 is formed by joining three corrugated steel plates 24X, 24Y, and 24Z arranged in the width direction (arrow W direction). Since the three corrugated steel plates 24X, 24Y, and 24Z have the same configuration, the configuration of the corrugated steel plate 24X will be mainly described below.

As shown in FIG. 2, the corrugated steel sheet 24X has a corrugated cross-sectional (longitudinal cross-sectional) shape in which peaks 26 and valleys 28 alternate. These corrugated steel plates 24X are arranged on the structural surface of the frame 12 with the creases (creases) M laterally (in the width direction). The corrugated steel plate 24X may be arranged on the structural surface of the frame 12 with its fold lines M vertically (vertically).

The top wall portion 26T of the mountain portion 26 and the bottom wall portion 28L of the valley portion 28 are vertical wall portions extending in the vertical direction. Further, the adjacent mountain portion 26 and valley portion 28 share an inclined wall portion 30 that connects the top wall portion 26T and the bottom wall portion 28L, respectively. The inclined wall portion 30 is inclined with respect to the top wall portion 26T and the bottom wall portion 28L.

As shown in FIG. 1, the outer peripheral frame 32 has a pair of horizontal flange portions 34 and a pair of vertical flange portions 36, and is formed in a frame shape surrounding the outer peripheral portion of the wall body 22. The pair of horizontal flange portions 34 and the pair of vertical flange portions 36 as flange portions are provided on the outer peripheral portion of the steel earthquake-resistant wall 20, and function as mounting members to be attached to the frame 12. Further, the pair of horizontal flange portions 34 and the pair of vertical flange portions 36 also function as shear force transmitting members that transmit the shearing force acting on the wall body 22 to the frame 12.

The pair of horizontal flange portions 34 and the pair of vertical flange portions 36 are formed of flat steel plates. Further, the pair of horizontal flange portions 34 are provided along the upper and lower end portions (horizontal side portions) of the wall body 22, and are joined to the end portions by welding or the like. On the other hand, the pair of vertical flange portions 36 are provided along the left and right end portions (vertical side portions) of the wall body 22, and are joined to the end portions by welding or the like.

As shown in FIG. 2, the upper horizontal flange portion 34 is provided with a joint plate 38 for the upper beam extending toward the upper beam 16U side. The upper beam joining plate 38 is joined by bolts 42 and nuts 44 in a state of being overlapped with a gusset plate 40 extending from the lower flange portion 16UA of the upper beam 16U toward the wall body 22 side. The upper beam joining plate 38 and the gusset plate 40 are not limited to bolts 42 and may be joined by welding or an adhesive. Further, the joint plate 38 for the upper beam and the gusset plate 40 together with the horizontal flange portion 34 constitute a mounting member for attaching the steel earthquake-resistant wall 20 to the frame 12.

As shown in FIG. 3, the lower lateral flange portion 34 is provided with a lower beam joining plate 46 extending toward the lower beam 16L side. The lower beam joining plate 46 penetrates the slab 18 constructed on the lower beam 16L in the thickness direction, and is joined to the upper flange portion 16LA of the lower beam 16L by welding or the like.

As shown in FIG. 4, the vertical flange portion 36 is provided with a column joining plate 48 extending toward the column 14. The column joining plate 48 is joined by welding or the like in a state of being overlapped with a gusset plate 50 extending from the side surface 14S of the column 14 to the wall body 22 side. The column joining plate 48 and the gusset plate 50 are not limited to welding, but may be joined by bolts or adhesives. Further, the column joint plate 48 and the gusset plate 50, together with the vertical flange portion 36, constitute a mounting member for attaching the steel earthquake-resistant wall 20 to the frame 12.

Further, the method of joining the pair of horizontal flange portions 34 and the pair of vertical flange portions 36 to the frame 12 is not limited to the above. The pair of horizontal flange portions 34 and the pair of vertical flange portions 36 may be joined to the frame 12 so that shear force can be transmitted. For example, the upper horizontal flange portion 34 is bolted or welded to the upper beam 16U. It may be directly joined by such means. Further, the pair of horizontal flange portions 34 and the pair of vertical flange portions 36 may be, for example, steel materials (shaped steel) such as H-shaped steel, L-shaped steel, T-shaped steel, and C-shaped steel.

As shown in FIG. 1, the adjacent corrugated steel plates 24X and 24Y and the adjacent corrugated steel plates 24Y and 24Z have stiffening ribs 52 provided at their respective widthwise ends with bolts 54 and nuts 56 (FIG. 1). It is joined by fastening by (see 4). The stiffening rib 52 is formed of a flat steel plate, is provided along the widthwise end of each corrugated steel plate 24X, 24Y, 24Z, and is joined to the end by welding or the like. The stiffening ribs 52 may be joined by welding or an adhesive.

As shown in FIG. 4, each stiffening rib 52 projects in a rib shape in the out-of-plane direction (arrow P direction) from the wall body 22 (corrugated steel plates 24Y and 24Z in FIG. 4). These stiffening ribs 52 impart out-of-plane rigidity to the wall body 22, and suppress buckling of the wall body 22 during an earthquake.

As shown in FIG. 5A, stiffening ribs 58 are provided on the front surface 22F and the rear surface 22R of the corrugated steel plate 24Y (wall body 22) arranged at the center, respectively. The stiffening rib 58 is made of L-shaped steel, and is arranged with the longitudinal direction as the height direction (vertical direction) of the wall body 22. Further, the stiffening ribs 58 on both sides of the corrugated steel plate 24Y face each other with the corrugated steel plate 24Y interposed therebetween.

The stiffening rib 58 is joined to the front surface 22F or the rear surface 22R of the corrugated steel plate 24Y by welding or by bolts 60 and nuts 62. These stiffening ribs 58 impart out-of-plane rigidity to the wall body 22, and suppress buckling of the wall body 22 during an earthquake.

The stiffening rib 58 can also be attached to the corrugated steel plates 24X and 24Z. Further, the stiffening rib 58 is not limited to the L-shaped steel, and may be, for example, a steel material (shaped steel) such as a C-shaped steel or an H-shaped steel. Further, for example, as shown in FIG. 5B, a flat plate-shaped stiffening rib 64 can be joined to the corrugated steel plate 24Y by welding or the like. Further, the stiffening ribs 58 and 64 may be provided as needed and may be omitted.

Here, as shown in FIGS. 2 and 3, the rear surface 22R of the wall body 22 is provided with a one-sided fireproof coating portion 70. The one-sided fireproof coating portion 70 is provided along the rear surface 22R of the wall body 22, and the rear surface 22R is covered with fireproof coating over the entire surface.

Specifically, the one-sided fireproof coating 70 is made of sprayed rock wool having a constant coating thickness G. The one-sided fireproof coating portion 70 is provided along the corrugated shape of the corrugated steel plate 24X, and its cross-sectional (longitudinal cross-sectional) shape is the same as the corrugated steel plate 24X. The heat capacity of the corrugated steel sheet 24X is increased by the one-sided fireproof coating portion 70. As a result, the wall body 22 is provided with fire resistance.

On the other hand, as shown in FIG. 2, the upper horizontal flange portion 34, the upper beam joining plate 38, and the gusset plate 40 as mounting members are provided with both side fireproof coating portions 72. The fireproof coating portions 72 on both sides are provided on both sides of the upper horizontal flange portion 34, the joint plate 38 for the upper beam and the gusset plate 40 (both sides in the out-of-plane direction of the steel earthquake-resistant wall 20), and these lateral flange portions 34, The upper beam joint plate 38 and the gusset plate 40 are fireproof coated from both sides over the entire surface.

The fireproof coatings 72 on both sides are made of sprayed rock wool. The fireproof coating portions 72 on both sides are provided integrally with the fireproof coating portions 74 that fireproofly coat both sides of the upper beam 16U. The fireproof coatings 72 on both sides impart fireproof performance to the horizontal flange portion 34, the upper beam joining plate 38, and the gusset plate 40. The fireproof coating portion 74 is made of sprayed rock wool like the fireproof coating portions 72 on both sides.

Further, as shown in FIG. 3, a fireproof coating portion 72 on both sides is provided on the lower lateral flange portion 34 as a mounting member. The fireproof coatings 72 on both sides are provided on both sides of the lower lateral flange 34 (both sides in the out-of-plane direction of the steel earthquake-resistant wall 20), and the lateral flanges 34 are fireproofed from both sides to the entire surface. .. Further, the fireproof coating portions 72 on both sides are made of sprayed rock wool. The fireproof coatings 72 on both sides impart fireproof performance to the lower lateral flange portion 34.

Further, as shown in FIG. 4, the vertical flange portion 36, the column joint plate 48, and the gusset plate 50 as mounting members are provided with refractory coating portions 72 on both sides. The fireproof coating portions 72 on both sides are provided on both sides of the vertical flange portion 36, the joint plate 48 for columns and the gusset plate 50 (both sides in the out-of-plane direction of the steel earthquake-resistant wall 20), and the vertical flange portions 36 and the joints for columns are provided. The plate 48 and the gusset plate 50 are fireproof coated from both sides over the entire surface.

The fireproof coatings 72 on both sides are made of sprayed rock wool. The fireproof coating portions 72 on both sides are provided integrally with the fireproof coating portion 76 that covers the pillar 14 with fire resistance. The fireproof coatings 72 on both sides impart fireproof performance to the vertical flange portion 36, the column joint plate 48, and the gusset plate 50. The fireproof coating portion 76 is made of sprayed rock wool, like the fireproof coating portions 72 on both sides.

Here, as shown in FIG. 2, for example, both sides of the upper horizontal flange portion 34 are both sides of the steel earthquake-resistant wall 20 in the out-of-plane direction (arrow P direction), and the lateral flange portions 34 exposed to the outside. It means a portion, and is a concept including not only the side surface 34S of the horizontal flange portion 34 but also the upper surface 34U and the lower surface 34L. This also applies to both sides of the lower horizontal flange portion 34 and the pair of vertical flange portions 36.

As shown in FIG. 3, the lower surface 34L of the lower lateral flange portion 34 is overlapped with the upper surface of the slab 18 and is not exposed to the outside. Therefore, the lower surface 34L of the lower lateral flange portion 34 is not included on both sides of the lower lateral flange portion 34.

Next, the operation of this embodiment will be described.

According to the fire-resistant structure 10 of the steel earthquake-resistant wall according to the present embodiment, a one-sided fire-resistant coating portion 70 is provided on the rear surface 22R of the wall body 22 of the steel earthquake-resistant wall 20. The one-sided fireproof coating portion 70 covers the rear surface 22R of the wall body 22 with fireproof coating along the rear surface 22R. As a result, the wall body 22 is provided with fire resistance.

Further, the outer peripheral frame 32 of the steel earthquake-resistant wall 20, that is, the pair of horizontal flange portions 34 and the pair of vertical flange portions 36 are provided with fireproof coating portions 72 on both sides. Further, both side fireproof coating portions 72 are also provided on the upper beam joint plate 38, the column joint plate 48, and the gusset plates 40 and 50. These two-sided fireproof coatings 72 cover a pair of horizontal flanges 34, a pair of vertical flanges 36, a joint plate 38 for upper beams, a joint plate 48 for columns, and gusset plates 40, 50 from both sides over the entire surface. doing. As a result, the pair of horizontal flange portions 34, the pair of vertical flange portions 36, the upper beam joining plate 38, the column joining plate 48, and the gusset plates 40, 50 are provided with fire resistance.

Therefore, in the present embodiment, the steel earthquake-resistant wall 20 can function not only as an earthquake-resistant wall but also as a fire-resistant partition wall. In the present embodiment, the front surface 22F of the wall body 22 may be directly exposed to the fire in the event of a fire. 24X, 24Y, 24Z) thermal deterioration is suppressed. Therefore, it is possible to impart a predetermined fire resistance to the steel earthquake-resistant wall 20.

Further, in the present embodiment, by coating only the rear surface 22R of the wall body 22 with the fireproof coating portion 70 on one side, the workability is improved as compared with the case where both sides of the wall body 22 are fireproof coated. Further, in the present embodiment, the cost can be reduced as compared with the configuration in which a fireproof board such as gypsum board is installed on one side of the wall body 22.

On the other hand, the pair of horizontal flange portions 34, the pair of vertical flange portions 36, the joint plate 38 for the upper beam, the joint plate 48 for columns and the gusset plates 40 and 50 as mounting members are fire-resistant coated from both sides by the fire-resistant coating portions 72 on both sides. Has been done. Therefore, for example, the steel seismic wall 20 from falling off from the frame 12 in the event of a fire is suppressed.

Further, in the present embodiment, the wall body 22 is formed of corrugated steel plates 24X, 24Y, 24Z. As a result, the contact area between the rear surface 22R of the wall body 22 and the one-sided fireproof coating portion 70 increases as compared with the case where the wall body 22 is formed of a flat steel plate. Therefore, in the event of a fire, it is possible to prevent the one-sided fireproof coating portion 70 from falling off from the rear surface 22R of the wall body 22.

The rear surface 22R of the wall body 22 may be provided with a hooking portion such as a pin or a stud that is hooked on the one-sided fireproof coating portion 70 and suppresses the one-sided fireproof coating portion 70 from falling off.

Next, a modified example of the above embodiment will be described.

In the above embodiment, the steel earthquake-resistant wall 20 is attached to the steel frame frame 12, but the above embodiment is not limited to this. For example, as shown in FIGS. 6 (A) and 6 (B), the steel earthquake-resistant wall 20 can be attached to a frame 81 made of reinforced concrete (RC structure) or reinforced steel frame concrete structure (SRC structure). be.

Specifically, as shown in FIG. 6A, a plurality of studs 80 are provided on the upper surface of the upper lateral flange portion 34. By embedding these studs 80 in the upper beam 82 of the RC frame 81, the wall body 22 is joined to the upper beam 82 via the lateral flange portion 34 so that the shear force can be transmitted.

Further, as shown in FIG. 6B, a plurality of studs 80 are provided on the vertical flange portion 36. By embedding these studs 80 in the columns 84 made of RC structure, the wall body 22 is joined to the columns 84 via the vertical flange portion 36 so that the shear force can be transmitted.

Here, the horizontal flange portion 34 and the vertical flange portion 36 as mounting members are provided with fireproof coating portions 72 on both sides. Thereby, the same effect as that of the above-described embodiment can be obtained.

Further, as shown in FIGS. 7 (A) and 7 (B), it is also possible to form an opening (doorway) 90 in the wall body 22 of the steel earthquake-resistant wall 20. Specifically, as shown in FIG. 7A, an opening 90 is formed below the corrugated steel plate 24Y in the center. The opening 90 includes an opening end flange portion 92 of the corrugated steel plate 24Y arranged on the upper side thereof, an opening end flange portion 94 of the corrugated steel plates 24X and 24Z arranged on both sides in the width direction (arrow W direction), and a flange portion 94 thereof. It is partitioned by a slab 18 arranged on the lower side. The side surfaces 92S1 and 94S1 of the opening end flanges 92 and 94 on the opening 90 side form an inner peripheral surface of the opening 90.

As shown in FIG. 7B, a pair of support columns 98 for the fire door 96 are provided on both sides of the opening 90. The pair of support columns 98 are formed in a cylindrical shape, and the inside is filled with a cement-based filler 100 such as grout and mortar. The cement-based filler 100 imparts fire resistance to the pair of support columns 98.

A pair of support columns 98 as the opening-side fireproof coating is arranged along the side surface 94S1 of the opening end flange portions 94 on both sides of the opening 90, and the side surface 94S1 is fireproof-coated. Further, a fireproof coating portion 102 such as sprayed rock wool is provided on the side surface 94S2 of the opening end flange portion 94 opposite to the opening 90. Although not shown, the side surface 92S1 of the open end flange portion 92 is also fireproof coated with an opening side fireproof coating such as sprayed rock wool.

Further, of the pair of support columns 98, a fire door 96 is attached to one of the support columns 98 so that the opening 90 can be opened and closed via a hinge (not shown). The term "fire door" as used herein is a concept including a fire door and a fire shutter.

By forming the opening 90 in the wall body 22 and covering the inner peripheral surfaces (side surfaces 92S1, 94S1) of the opening 90 with fire resistance in this way, the steel earthquake-resistant wall 20 is evacuated while maintaining the fire resistance performance. Can be installed in. Therefore, the versatility of the steel shear wall 20 is improved.

Further, in the modified example shown in FIG. 8, a fire shutter 104 for opening and closing the opening 90 is attached to the steel earthquake-resistant wall 20. In this configuration, the side surface 94S1 of the opening end flange portion 94, which is the inner peripheral surface of the opening 90, is fireproof coated by the opening side fireproof coating portion 106 such as sprayed rock wool. Further, the side surface 94S2 of the opening end flange portion 94 opposite to the opening 90 is also fireproof coated by a fireproof coating portion 108 such as sprayed rock wool.

Further, the pair of support columns 110 of the fire shutter 104 are arranged on the front surface 22F side of the wall body 22. The pair of support columns 110 are formed in a cylindrical shape, and the cement-based filler 112 is filled therein. The cement-based filler 112 imparts fire resistance to the pair of support columns 110.

Further, in the modified example shown in FIG. 9, a steel earthquake-resistant wall 20 is installed in front of the elevator shaft 120. The wall body 22 of the steel earthquake-resistant wall 20 is formed with an opening 90 leading to the entrance / exit 122 of the elevator shaft 120. The entrance / exit 122 of the elevator shaft 120 can be opened / closed by a pair of opening / closing doors 124.

A pair of fire doors 130 are arranged on the front surface 22F side of the wall body 22. The pair of fire doors 130 are attached to the wall body 22 via a support pillar 131, and the opening 90 can be opened and closed. The inside of the support column 131 on the hanging side is filled with the cement-based filler 133. Further, the side surface 94S1 on the opening side 90 side of the opening end flange portions 94 on both sides of the opening 90 is fireproof coated by the opening side fireproof coating portion 132 such as sprayed rock wool. Further, the side surface 94S2 of the opening end flange portion 94 opposite to the opening 90 is also fireproof coated by a fireproof coating portion 134 such as sprayed rock wool.

When the opening 90 is formed in the steel earthquake-resistant wall 20 as in each of the above modifications, at least the inner peripheral surface of the opening 90 is fire-resistant coated by the opening-side fire-resistant coating portion, whereby the steel earthquake-resistant wall 20 is formed. Fire resistance performance can be maintained.

Next, in the above embodiment, the wall body 22 is formed of three corrugated steel plates 24X, 24Y, 24Z, but the above embodiment is not limited to this. The wall body 22 may be formed of a single corrugated steel plate.

Further, the wall body 22 is not limited to the corrugated steel plates 24X, 24Y, and 24Z, and may be formed of other steel materials such as flat steel plates and shaped steels. For example, in the modified examples shown in FIGS. 10 (A) and 10 (B), the steel earthquake-resistant wall 140 is formed on a wall body 142 formed of a flat steel plate 144 or the like and an outer peripheral portion of the wall body 142. It has an outer peripheral frame 143 provided.

As shown in FIG. 10B, the rear surface 142R of the wall body 142 is provided with a one-sided fireproof coating portion 146 that fireproofly covers the rear surface 142R. The one-sided fireproof coating portion 146 is provided along the rear surface 142R of the wall body 142. Further, the lateral flange portion 143A of the outer peripheral frame 143 is provided with fireproof coating portions 150 on both sides. Further, the vertical flange portion 143B (see FIG. 10A) is also provided with a fireproof coating portion on both sides (not shown). Thereby, the same effect as that of the above-described embodiment can be obtained.

Lattice-shaped stiffening ribs 148 are appropriately provided on the front surface 142F and the rear surface 142R of the wall body 142. Further, the horizontal flange portion 143A and the vertical flange portion 143B are examples of flange portions constituting the mounting member.

Next, in the above-described embodiment shown in FIG. 2 and the like, sprayed rock wool was used as the one-sided fire-resistant coating portion 70 and the two-sided fire-resistant coating portion 72, but the above-described embodiment is not limited to this. As the one-sided fireproof coating portion, for example, a fireproof paint applied to the rear surface 22R of the wall body 22, a sheet-shaped wound fireproof coating material arranged along the rear surface 22R of the wall body 22, or the like may be used. Further, fire-resistant paint, wrapping fire-resistant coating material, and the like can also be used for the fire-resistant coating portions 72 on both sides.

Further, in the above embodiment, an example in which the one-sided fireproof coating portion 70 is provided only on the rear surface 22R of the wall body 22 is shown, but conversely, the one-sided fireproof coating portion is provided only on the front surface 22F of the wall body 22. Is also possible. That is, one side of the wall body 22 (steel earthquake-resistant wall 20) means either the front surface 22F or the rear surface 22R.

Further, the steel earthquake-resistant wall 20 can be used not only as a fire-resistant partition wall but also as, for example, a fire spread prevention wall for preventing the spread of fire.

Further, in the above embodiment, the horizontal members constituting the frame are the upper beam 16U and the lower beam 16L, but the horizontal members may be, for example, small beams or slabs.

Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in combination as appropriate. Of course, it can be carried out in various modes as long as it does not deviate.

10 Fireproof structure 12 Frame 14 Pillar 16L Lower beam (horizontal member)
16U upper beam (horizontal member)
20 Steel shear wall 22 Wall 22R Rear surface (one side of steel shear wall)
34 Horizontal flange part (flange part)
36 Vertical flange part (flange part)
70 One-sided fire-resistant coating 72 Both-sided fire-resistant coating 81 Frame 82 Upper beam (horizontal member)
84 Pillar 90 Opening 94 Opening end Flange 94S1 Side surface (inner peripheral surface of opening)
96 Fire door 98 Support pillar (opening side fireproof coating)
100 Cement-based filler (opening side fireproof coating)
104 Fire shutter (fire door)
106 Open side fireproof coating 130 Fire door 132 Open side fireproof coating 140 Steel shear wall 142 Wall 142R Rear surface (one side of steel shear wall)
143A Horizontal flange part (flange part)
143B Vertical flange part (flange part)
146 One-sided fire-resistant coating 150 Both-sided fire-resistant coating

Claims (2)

A steel shear wall that is attached to a frame having a pair of columns and upper and lower horizontal members erected on the pair of columns and has a single corrugated steel plate.
A one-sided fireproof coating portion that is provided only on one side of the corrugated steel sheet and has a corrugated cross-sectional shape along the one side of the corrugated steel sheet and that only covers one side of the corrugated steel sheet.
A flange portion provided on the outer peripheral portion of the steel earthquake-resistant wall and joined to the frame, and a flange portion.
Both-sided fire-resistant coatings made of sprayed rock wool, fire-resistant paint, or wrapped fire-resistant coating material, which are provided on both sides of the steel earthquake-resistant wall in the out-of-plane direction and which cover the entire surface of the flange portion exposed to the outside.
Fireproof structure of steel shear wall equipped with. A fire door that is attached to the steel shear wall and opens and closes the opening formed in the steel shear wall.
An opening-side fireproof coating that fireproofly coats the inner peripheral surface of the opening,
The fire-resistant structure of a steel earthquake-resistant wall according to claim 1.

Images