JP6915606B2 - Wall structures, reinforcement methods for existing wall structures, and buildings - Google Patents

Description

The present invention relates to a wall structure having a wall material made of folded sheet metal, a method for reinforcing an existing wall structure, and a building having the wall structure.

Buildings such as buildings that store production equipment in factories such as steel mills are often made of steel, and the structure is such that the entire building is supported mainly by columns and beams on the outer periphery of the building. A wall structure such as an outer wall of such a building is configured by attaching a furring strip to a pillar or a stud, and further fastening a wall material made of a folded sheet metal such as a thin steel plate to the furring strip. ..

In the standard construction method for steel plate outer walls, which uses thin steel plates bent into shapes such as square waves and round waves as wall materials, thin steel plates with a thickness of about 0.4 to 0.8 mm are used for the wall materials. As a general rule, a lip channel steel or a square steel pipe having a thickness of 2.3 mm or 3.2 mm is used as the base material for the furring strip. Then, the wall material is fastened to the furring strip material with a drill screw or the like at predetermined intervals in a state where the ends are overlapped with each other (see, for example, Non-Patent Document 1).

Conventionally, in the structural design of a building, it is common that the wall structure composed of these furring strips and wall materials is not treated as a seismic element that resists seismic force and the like. Therefore, in structural design and seismic retrofitting of buildings having a wall structure having a wall material made of folded sheet metal, it is necessary to provide shaft braces and steel plate seismic walls as seismic elements.

On the other hand, as a form of a thin sheet lightweight shaped steel building, a structural surface made of a flat sheet metal material or a folded sheet metal material on both sides or one side of a frame material made of lightweight shaped steel, as in the wooden frame wall construction method. There is also a construction method in which a panel constructed by attaching a material with a drill screw or the like is used as a seismic element (see, for example, Non-Patent Document 2).

Edited by the Steel Plate Exterior Wall Construction Standards Committee, "Steel Steel Exterior Wall Construction Standard SSW2011", Japan Metal Roofing Association / Japanese Society of Steel Construction, December 2011, p. 25, 40-43 Japan Iron and Steel Federation, Thin Plate Lightweight Shaped Steel Building Design Guide, edited by Editorial Committee, "Guideline for Thin Plate Lightweight Shaped Steel Building Design," Gihodo Publishing Co., Ltd., June 2002, p. 16-18

If a wall structure composed of furring strips, wall materials, etc. as in Non-Patent Document 1 can be treated as a seismic element that resists seismic forces, etc., it will be used in structural design, seismic diagnosis, reinforcement, etc. of buildings. Can be used as a member. However, it is known that such a wall structure cannot exhibit sufficient proof stress as it is.

Further, as in Non-Patent Document 2, a panel formed by attaching a structural surface material made of a flat plate sheet metal material, a folded sheet metal material, or the like to a frame material with screws or the like is provided with a wall structure as in Non-Patent Document 1. If you try to reinforce the existing building by attaching it to the wall part of the existing building you have, the wall structure of the existing building is very different from the wall structure consisting of panels, so you can add a frame material to the wall of the existing building or It is necessary to replace the flat sheet metal material and the folded sheet metal material which are the structural surface materials, which requires a great deal of labor.

In order to solve the above problems, the present invention provides a wall structure having a wall material made of folded sheet metal, a method for reinforcing an existing wall structure, and a building, which can exhibit sufficient yield strength with a simple structure. The purpose.

The inventors conducted numerical analysis and force experiment on a wall structure composed of furring strips, wall materials, etc. as in Non-Patent Document 1, and the reason why such a wall structure cannot exhibit sufficient proof stress is When the wall structure receives an external force such as seismic force, large deformation occurs locally at both ends where the furring strip is attached to the column or stud, and the wall or furring strip made of folded sheet metal is used. It was found that this is because the proof stress of other parts is not fully exhibited. Therefore, it was conceived that it is possible to improve the yield strength of the entire wall structure having the wall material made of folded sheet metal by suppressing the local deformation of the furring strip.

Based on this finding, the present invention has the following features in order to solve the above problems.

[1] A furring strip made of open-section steel attached to a pillar or stud of a building, a wall material made of folded sheet metal attached to the furring strip, and the pillar of the furring strip. Alternatively, a wall structure characterized by having a reinforcing member attached to a reinforcing portion adjacent to the attachment portion to the stud and reinforcing the reinforcing portion.

[2] The wall structure according to [1], wherein the reinforcing member is attached to a portion where a clearance is formed between a pile of folded sheet metal materials forming the wall material and the furring strip material. ..

[3] The wall structure according to [1] or [2], wherein a plurality of the reinforcing members are attached to each of the reinforcing portions.

[4] The wall structure according to any one of [1] to [3], wherein the reinforcing member includes a first reinforcing member that covers a surface of the furring strip on the opening side at the reinforcing portion. ..

[5] The wall according to any one of [1] to [4], wherein the reinforcing member includes a second reinforcing member that covers a surface other than the opening side of the furring strip at the reinforcing portion. Construction.

[6] The wall structure according to any one of [1] to [5], wherein the furring strip is made of channel steel.

[7] A method for reinforcing an existing wall structure having a furring strip made of an open-section steel material attached to a pillar or a stud of a building and a wall material made of a folded sheet metal material attached to the furring strip. A method for reinforcing an existing wall structure, which comprises attaching a reinforcing member to the reinforcing portion so as to reinforce the reinforcing portion adjacent to the attachment portion of the furring strip to the column or stud.

[8] The existing wall structure according to [8], wherein the reinforcing member is attached to a portion where a clearance is formed between a pile of folded sheet metal materials forming the wall material and the furring strip material. Reinforcement method.

[9] The method for reinforcing an existing wall structure according to [7] or [8], wherein a plurality of the reinforcing members are attached to each of the reinforcing portions.

[10] The existing wall according to any one of [7] to [9], wherein the reinforcing member includes a first reinforcing member that covers a surface of the furring strip on the opening side at the reinforcing portion. How to reinforce the structure.

[11] The existing reinforcing member according to any one of [7] to [10], wherein the reinforcing member includes a second reinforcing member that covers a surface other than the opening side of the furring strip at the reinforcing portion. How to reinforce the wall structure.

[12] The method for reinforcing an existing wall structure according to any one of [7] to [11], wherein the furring strip is made of channel steel.

[13] A building having the wall structure according to any one of [1] to [6].

According to the wall structure of the present invention, the method of reinforcing the existing wall structure, and the building, in a wall structure having a wall material made of folded sheet metal, the furring strip is attached to a column or a stud at both ends. It is possible to prevent the cross section of the stud from being significantly deformed locally, and to exert sufficient proof stress with a simple configuration.

By utilizing this wall structure as a structural member in the structural design of a building and the seismic diagnosis / reinforcement of an existing building, it is possible to economically secure and improve the yield strength of the entire building with a simple configuration.

It is a top view which shows the wall structure of this invention, the method of reinforcing an existing wall structure, and a building. It is an elevation view which shows the wall structure of this invention, the reinforcement method of the existing wall structure, and a building. It is sectional drawing which shows the AA cross section in FIG. It is sectional drawing which shows the BB cross section in FIG.

Hereinafter, the wall structure of the present invention, the method of reinforcing the existing wall structure, and the embodiment of the building will be described with reference to the drawings.

First, the wall structure 1 of the present embodiment will be described with reference to FIGS. 1 to 4. The wall structure 1 is erected between columns or studs 2 of a building, and has a furring strip 11 attached to the pillars or studs 2 at both ends, a wall member 12 attached to the furring strip 11, and a trunk. It has a reinforcing member 13 that reinforces both ends of the edge member 11, that is, a reinforcing portion that is a portion adjacent to a column or a portion attached to a stud 2.

The furring strip 11 is made of lip channel steel having an open cross section and is attached to a column or stud 2 via an angle piece 14 and a bolt nut 14S so that the opening between the lips faces upward. The wall material 12 is made of a square wave folded sheet metal material, and is attached to the furring strip 11 with a drill screw 15.

As shown in FIGS. 1 and 2, two reinforcing members 13 are attached to each reinforcing portion of the furring strip 11. Each reinforcing member 13 includes a plate-shaped first reinforcing member 13L that covers the lower surface of the furring strip 11 on the opening side, and a second reinforcing member 13U having a substantially U-shaped cross section that covers the upper surface and the side surface of the furring strip 11. It is composed of.

Although it is the range of the above-mentioned reinforcing portion, it is from the outer edge of the attachment portion of the furring strip 11 to the pillar or the stud (in the present embodiment, the left and right ends of the angle piece 14) along the length direction of the furring strip 11. For example, the range up to 300 mm is reinforced with the reinforcing member 13.

The reinforcing member 13 reinforces the reinforcing portion by being attached to the furring strip 11 so as to surround the outer periphery of the reinforcing portion of the furring strip 11. As shown in FIG. 1, the reinforcing member 13 is attached so as to fit in a portion where a clearance is formed between the mountain 12a of the folded sheet metal material forming the wall material 12 and the furring strip 11.

The first reinforcing member 13L is a drill screw so as to be hung between both lips of the lip channel steel forming the furring strip 11 at the reinforcing portion and to cover the lower surface of the furring strip 11 on the opening side. It is attached to the furring strip 11 with 13S.

The second reinforcing member 13U is manufactured by joining three flat plates having a thickness of 4.5 mm by single-sided fillet welding, and has dimensions so as to be as close as possible to the furring strip 11. The second reinforcing member 13U is fitted into the upper surface and the side surface, which are surfaces other than the opening side of the furring strip 11, and is fixed to the furring strip 11 by this fitting force. The second reinforcing member 13U may be further fixed to the furring strip 11 by using a drill screw, an adhesive, or the like, if necessary.

Next, the method of reinforcing the existing wall structure of the present embodiment will be described with reference to FIGS. 1 to 4. The existing wall structure to which the reinforcing method of the existing wall structure is applied has a furring strip 11 attached to a pillar or a stud 2 of a building, and a wall member 12 attached to the furring strip 11. Then, the reinforcing member 13 is attached to the existing wall structure later so as to reinforce the reinforcing portion adjacent to the attachment portion to the column or the stud 2 at the end portion of the furring strip 11. Is.

The detailed configuration of the furring strip 11, the wall material 12, and the reinforcing member 13 is the same as that in the wall structure 1 described above.

Further, the building of the present embodiment is configured by having the wall structure 1.

According to the wall structure of the present embodiment, the method of reinforcing the existing wall structure, and the building, in the wall structure 1 having the wall material 12 made of folded sheet metal, a pillar or a stud at the end of the furring strip 11. The reinforcing portion adjacent to the attachment portion to 2 can be restrained and reinforced by the reinforcing member 13 having a simple structure. In particular, the second reinforcing member 13U can be fixed to the furring strip 11 simply by fitting it into the upper surface and the side surface of the furring strip 11, and has a simple structure.

When the wall structure 1 receives an external force such as a seismic force by the first reinforcing member 13L attached so as to cover the lower surface of the furring strip 11 on the opening side, the reinforcing portion of the furring strip 11 is used. It is suppressed that the cross section of the furring strip 11 is locally significantly deformed in the closing direction.

Further, when the wall structure 1 receives an external force such as a seismic force by the second reinforcing member 13U fitted to the upper surface and the side surface which are surfaces other than the opening side of the furring strip 11, the furring strip 11 is described above. At the reinforcing portion, it is suppressed that the cross section of the furring strip 11 is locally significantly deformed in the opening direction.

As described above, when the wall structure 1 receives an external force such as a seismic force due to the reinforcing member 13 composed of the first reinforcing member 13L and the second reinforcing member 13U, the furring strip 11 is locally deformed at the reinforcing portion. It is suppressed, and the proof stress of the wall material 12 and other parts of the furring strip 11 constituting the wall structure 1 can be sufficiently exhibited.

Further, since a plurality of reinforcing members 13 (two in the present embodiment) are attached to each reinforcing portion of the furring strip 11, each of the above effects is further enhanced.

By utilizing this wall structure 1 as a structural member in the structural design of a building and the seismic diagnosis / reinforcement of an existing building, it is possible to economically secure and improve the yield strength of the entire building with a simple configuration. ..

1 Wall structure 2 Pillars or studs 11 Furnace material 12 Wall material 12a Mountain of wall material (folded sheet metal) 13 Reinforcing member 13U Second reinforcing member 13L First reinforcing member

Claims (13)

Furnace lumber made of open-section steel attached to building columns or studs,
A wall material made of folded sheet metal and attached to the furring strip,
A wall structure characterized by having a reinforcing member attached to a reinforcing portion adjacent to an attachment portion of the furring strip to the pillar or a stud and reinforcing the reinforcing portion. The wall structure according to claim 1, wherein the reinforcing member is attached to a portion where a clearance is formed between a pile of folded sheet metal materials forming the wall material and the furring strip material. The wall structure according to claim 1 or 2, wherein a plurality of the reinforcing members are attached to each reinforcing portion. The wall structure according to any one of claims 1 to 3, wherein the reinforcing member includes a first reinforcing member that covers a surface of the furring strip on the opening side at the reinforcing portion. The wall structure according to any one of claims 1 to 4, wherein the reinforcing member includes a second reinforcing member that covers a surface of the furring strip other than the opening side at the reinforcing portion. The wall structure according to any one of claims 1 to 5, wherein the furring strip is made of channel steel. Furnace lumber made of open-section steel attached to building columns or studs,
A method for reinforcing an existing wall structure having a wall material made of a folded sheet metal material attached to the furring strip material.
A method for reinforcing an existing wall structure, which comprises attaching a reinforcing member to the reinforcing portion so as to reinforce the reinforcing portion adjacent to the attachment portion of the furring strip to the column or stud. The method for reinforcing an existing wall structure according to claim 7, wherein the reinforcing member is attached to a portion where a clearance is formed between a pile of folded sheet metal materials forming the wall material and the furring strip material. .. The method for reinforcing an existing wall structure according to claim 7 or 8, wherein a plurality of the reinforcing members are attached to each reinforcing portion. The method for reinforcing an existing wall structure according to any one of claims 7 to 9, wherein the reinforcing member includes a first reinforcing member that covers a surface of the furring strip on the opening side at the reinforcing portion. The method for reinforcing an existing wall structure according to any one of claims 7 to 10, wherein the reinforcing member includes a second reinforcing member that covers a surface other than the opening side of the furring strip at the reinforcing portion. .. The method for reinforcing an existing wall structure according to any one of claims 7 to 11, wherein the furring strip is made of channel steel. A building having the wall structure according to any one of claims 1 to 6.

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