JP2024027647A - Steel plates for structural materials and methods for manufacturing steel plates - Google Patents

Abstract

[Problem] To suppress breakage of a steel plate without increasing material cost. A steel plate 5 serving as a structural material includes a main body 11 that can be incorporated into a structure. The body 11 can be surrounded by a stiffener 6 made of wood material. The main body 11 includes a central plate 12 having a predetermined length and width, and a joining plate 13 having a width larger than the central plate 12. The joint plates 13 are welded to both ends of the center plate 12 in the longitudinal direction. According to this configuration, since there is no part to be cut off when forming the main body 11, the material cost when manufacturing the steel plate 5 does not increase. Furthermore, since both sides of the center plate 12 in the main body 11 in the width direction do not serve as cut surfaces, there is no possibility that the both sides will be damaged due to cutting. As a result, when force is applied repeatedly in the longitudinal direction of the steel plate 5, breakage of the steel plate 5 due to the scratches is suppressed. [Selection diagram] Figure 2

Description

The present invention relates to a steel plate as a structural material and a method for manufacturing the steel plate.

Structural materials are incorporated into structures such as buildings. Structural materials include frame materials such as columns and beams. Structural materials also include braces for reinforcing the structure. The braces are arranged between the frame members, ie between the columns and beams.

Patent Document 1 discloses a buckling restraint brace as a type of the above-mentioned brace. By incorporating this buckling restraint brace into a structure such as a building, the strength and rigidity of the structure can be increased. The buckling restraint brace is formed by surrounding a steel plate having a predetermined length with a stiffener made of a wood material. The stiffener is for suppressing buckling of the steel plate when the steel plate is compressed in the longitudinal direction.

Further, the steel plate described in Patent Document 1 includes a main body that can be incorporated into a structure, and the main body is surrounded by the stiffening material. The main body of the steel plate includes a central plate having a predetermined length and width, and a joint plate having a width larger than the central plate. The joint plates are arranged at both longitudinal ends of the central plate and are integral with the central plate. When incorporating the buckling restraint brace into a structure such as a building, the joining plate of the steel plate is joined to the structure.

When manufacturing the above-mentioned steel plate, the main body of the steel plate is formed by cutting off a part of a metal material in the shape of a rectangular plate having a predetermined length as follows. That is, the center plate and the joint plate of the main body are formed by cutting off a part of the material so that the width of the material other than both ends in the longitudinal direction is smaller than the width of both ends. The reason why the width of the center plate in the main body of the steel plate is made smaller than the width of the joint plate is that when force acts on the steel plate in its longitudinal direction and the steel plate yields, the center plate is connected to the structure instead of the joint plate. This is to make them surrender.

Patent No. 6942279

When forming the main body of a steel plate in a structural material by cutting off a part of a metal material in the shape of a rectangular plate of a predetermined length as described above, the material must be made large to enable such cutting. Must be. For this reason, the material cost of the above-mentioned material becomes high, and the transportation of the above-mentioned material becomes time-consuming. Further, if the cut surface is scratched when cutting off a part of the material, there is a risk that the steel plate will break due to repeated force acting in the longitudinal direction of the steel plate.

Below, means for solving the above problems and their effects will be described.
A structural steel plate that solves the above problems includes a main body that can be incorporated into a structure. The body can be surrounded by a stiffener made of wood material. Further, the main body includes a central plate having a predetermined length and width, and a joining plate having a width larger than the central plate. The joint plates are welded to both ends of the center plate in the longitudinal direction.

According to the above configuration, by welding the joint plates to both ends of the center plate in the longitudinal direction, the main body including the joint plates having a width larger than the center plate is formed. In this case, since there is no part that must be cut off when forming the main body of the steel plate, the material cost when manufacturing the steel plate does not increase. Furthermore, since both sides of the central plate in the main body in the width direction do not serve as cut surfaces, there are no scratches or the like caused by cutting on both sides. As a result, when force is applied repeatedly in the longitudinal direction of the steel plate, breakage of the steel plate due to the scratches is suppressed.

The steel plate of the structural material includes an end plate extending across the boundary between the longitudinal end of the center plate and the joint plate. The end plates are vertically arranged and welded to the longitudinal ends of the center plate and the joint plate.

According to the above configuration, the connection between the center plate and the joint plate in the main body is made strong by the end plates.
The steel plate of the structural material is provided with a reinforcing plate disposed at a corner formed by the longitudinal end of the central plate and the joint plate. The reinforcing plates are each welded to the center plate and the joint plate.

According to the above configuration, the strength near the joint between the center plate and the joint plate in the main body can be increased by the reinforcing plate.
A method for manufacturing a steel plate that solves the above problems is applied to a steel plate that is a structural member that has a main body that can be incorporated into a structure and surrounded by a stiffener made of a wood material. The main body of the steel plate is formed by welding joining plates having a width larger than the center plate to both longitudinal ends of a center plate having a predetermined length and width.

According to the above method, by welding the joint plates to both ends of the center plate in the longitudinal direction, a main body of the steel plate including the joint plates having a width larger than that of the center plate is formed. In this case, since there is no part that must be cut off when forming the main body of the steel plate, the material cost when manufacturing the steel plate does not increase. Furthermore, since both sides of the central plate in the main body in the width direction do not serve as cut surfaces, there are no scratches or the like caused by cutting on both sides. As a result, when force is applied repeatedly in the longitudinal direction of the steel plate, breakage of the steel plate due to the scratches is suppressed.

In the above method for manufacturing a steel plate, after welding joint plates to both ends of the center plate in the longitudinal direction, the ends are welded so as to be perpendicular to the longitudinal ends of the center plate and the joint plates and to straddle them. Place the board. A steel plate is then formed by welding the end plates to the longitudinal ends of the center plate and the joint plate.

According to the above method, the connection between the central plate and the joint plate in the main body of steel material is made strong by the end plates.
In the above method for manufacturing a steel plate, after welding joint plates to both longitudinal ends of the center plate, a reinforcing plate is placed at a corner formed by the longitudinal ends of the center plate and the joint plate, and the reinforcing plate A reinforcing plate welding process is performed in which the reinforcing plate is welded to the center plate and the joint plate, respectively. After the reinforcing plate welding process, the end plate is arranged perpendicularly to the longitudinal end of the center plate and the joining plate, and so as to straddle both, and the end plate is placed in the longitudinal direction of the center plate. The steel plate is formed by performing an end plate welding process to weld the ends of the direction and the joint plate.

According to the above method, the strength near the joint between the center plate and the joint plate in the main body can be increased by the reinforcing plate.

FIG. 2 is a side view showing a buckling restraint brace incorporated into a structure such as a building. FIG. 3 is an exploded perspective view showing the buckling restraint brace. It is a side view which shows the main body of the steel plate in the said buckling restraint brace. It is a top view which shows the main body of the steel plate in the said buckling restraint brace. It is a top view showing how to attach a reinforcing plate to the main body of the above-mentioned steel plate. It is a top view which shows how the end plate is attached to the main body of the said steel plate. It is a side view which shows how the end plate is attached to the main body of the said steel plate. It is a side view showing the above-mentioned steel plate. It is a top view showing the above-mentioned steel plate.

Hereinafter, one embodiment of a steel plate as a structural material and a method for manufacturing the steel plate will be described with reference to FIGS. 1 to 9.
As shown in FIG. 1, frame members such as columns 1 and beams 2 are incorporated into a structure such as a building. A plurality of gusset plates 3 are attached to the frame member of the structure at a predetermined distance. A buckling restraining brace 4 as a structural member is incorporated between the gusset plates 3. The buckling restraint brace 4 is for increasing the strength and rigidity of the structure.

As shown in FIG. 2, the buckling restraint brace 4 is formed by surrounding a steel plate 5 having a predetermined length with a stiffening member 6 made of a wood material. The stiffener 6 is for suppressing buckling of the steel plate 5 when the steel plate 5 is compressed in the longitudinal direction. As the stiffening material 6, for example, a laminated wood made by stacking plate materials in the width direction of the steel plate 5 is used. Note that as the stiffener 6, it is also possible to use cross laminated timber (cross laminated timber: CLT) or veneer laminated timber (laminated veneer lumbar: LVL).

<Detailed structure of steel plate 5>
The steel plate 5 includes a main body 11 of a predetermined length that can be incorporated into a structure. The main body 11 includes a central plate 12 having a predetermined length and width, and a joining plate 13 having a width larger than the width of the central plate 12. The joining plates 13 are welded to both end faces of the center plate 12 in the longitudinal direction, respectively, by full penetration welding or the like. At this time, both sides of the joint plate 13 in the width direction protrude outward in the width direction from both sides of the center plate 12 in the width direction.

The steel plate 5 includes, in addition to the main body 11, an end plate 7 and a reinforcing plate 14. The end plate 7 extends so as to straddle the boundary between the longitudinal end of the center plate 12 and the joining plate 13. The end plate 7 is arranged perpendicularly to the longitudinal end of the center plate 12 and the widthwise center of the joint plate 13. The end plate 7 is welded to the longitudinal end of the center plate 12 and the widthwise center of the joint plate 13 by fillet welding or the like. The reinforcing plate 14 is formed into a right triangular plate shape. The reinforcing plate 14 is arranged at a corner formed by the longitudinal end of the center plate 12 and the joining plate 13. The reinforcing plate 14 is welded to the center plate 12 and the joint plate 13 by full penetration welding or the like.

<Relationship between steel plate 5 and stiffener 6>
The stiffeners 6 are arranged on both sides of the center plate 12 in the thickness direction. By fastening the stiffeners 6 to each other with bolts or the like, the center plate 12 of the main body 11 of the steel plate 5 is surrounded by the stiffeners 6. At this time, the steel plate 5 other than both longitudinal ends of the center plate 12 of the main body 11 is located inside the stiffener 6, and the joint plate 13 of the main body 11 is exposed from the stiffener 6. In addition, only a portion of each of the end plates 7 and reinforcing plates 14 of the steel plate 5 and the longitudinal ends of the center plate 12 of the main body 11 are exposed from the stiffener 6.

<Incorporation of buckling restraint brace 4 into structure>
As shown in FIG. 1, the end of the steel plate 5 and the gusset plate 3 are fixed by splints 16 and 17. Specifically, the splint plate 16 is bolted to the gusset plate 3 and the joint plate 13 of the main body 11 of the steel plate 5. Furthermore, the splint plate 17 is bolted to the gusset plate 3 and the end plate 7 of the steel plate 5. Thereby, both ends of the steel plate 5 are fixed to the gusset plate 3, respectively. As a result, the steel plate 5 is incorporated into the structure.

Next, a method for manufacturing the steel plate 5 will be explained with reference to FIGS. 3 to 9.
When manufacturing the steel plate 5, first, as shown in FIGS. 3 and 4, joint plates 13 are placed near both ends of the center plate 12 in the longitudinal direction. Thereafter, the main body 11 of the steel plate 5 is formed by welding the joint plate 13 to both longitudinal ends of the center plate 12 as shown by the arrows in FIGS. 3 and 4. After the main body 11 is formed in this manner, the following reinforcing plate welding process and end plate welding process are sequentially performed.

<Reinforcement plate welding process>
In this process, after welding the joining plates 13 to both longitudinal ends of the center plate 12, reinforcing plates are attached to the corners formed by the longitudinal ends of the center plate 12 and the joining plates 13, as shown in FIG. 14 are arranged. Then, as shown by arrows in FIG. 5, the reinforcing plate 14 is welded to the center plate 12 and the joint plate 13, respectively.

<End plate welding process>
In this process, after performing the reinforcing plate welding process, the end plate 7 is perpendicular to the longitudinal end of the center plate 12 and the joint plate 13, as shown by the arrow in FIG. placed across the Then, as shown by arrows in FIG. 7, the end plates 7 are welded to the longitudinal ends of the center plate 12 and the joint plate 13. Thereby, the steel plate 5 is formed as shown in FIGS. 8 and 9.

According to this embodiment described in detail above, the following effects can be obtained.
(1) The main body 11 of the steel plate 5 is provided with a joint plate 13 having a width larger than that of the center plate 12 by welding the joint plates 13 to both ends of the center plate 12 in the longitudinal direction. In this case, since there is no part that must be cut off when forming the main body 11 of the steel plate 5, the material cost when manufacturing the steel plate 5 does not increase. Moreover, since both sides of the center plate 12 in the main body 11 in the width direction do not serve as cut surfaces, there is no possibility that the both sides will be damaged due to cutting. As a result, when force is applied repeatedly in the longitudinal direction of the steel plate 5, breakage of the steel plate 5 due to the scratches is suppressed.

(2) The steel plate 5 includes an end plate 7 that extends across the boundary between the longitudinal end of the center plate 12 and the joint plate 13. The end plates 7 are vertically disposed and welded to the longitudinal ends of the central plate 12 and to the joining plate 13. As a result, the connection between the center plate 12 and the joint plate 13 in the main body 11 of the steel plate 5 is made strong by the end plates 7.

(3) The steel plate 5 includes a reinforcing plate 14 arranged at a corner of the main body 11 formed by the longitudinal end of the center plate 12 and the joint plate 13. The reinforcing plate 14 is welded to the center plate 12 and the joint plate 13, respectively. As a result, the reinforcement plate 14 can increase the strength of the main body 11 near the joint between the center plate 12 and the joint plate 13.

Note that the above embodiment can also be modified as follows, for example. The above embodiment and the following modification examples can be implemented in combination with each other within a technically consistent range.
- The reinforcing plate 14 of the steel plate 5 may be omitted. In this case, the reinforcing plate welding step when manufacturing the steel plate 5 is omitted.

- The end plate 7 of the steel plate 5 may be omitted. In this case, the end plate welding step when manufacturing the steel plate 5 is omitted.
- Although the buckling restraint brace 4 is illustrated as a structural member including the steel plate 5, the structural member may be a frame member such as a column 1 and a beam 2.

1... Column 2... Beam 3... Gusset plate 4... Buckling restraint brace 5... Steel plate 6... Stiffener 7... End plate 11... Main body 12... Center plate 13... Joint plate 14... Reinforcement plate 16, 17... Splinter plate

Claims (6)

A structural steel plate comprising a main body that can be incorporated into a structure, and the main body can be surrounded by a stiffening material made of a wood material,
The main body includes a central plate having a predetermined length and width, and a joint plate having a width larger than the central plate,
The joint plates are structural steel plates that are welded to both ends of the center plate in the longitudinal direction. comprising an end plate extending across the boundary between the longitudinal end of the center plate and the joint plate,
2. The structural steel plate according to claim 1, wherein the end plate is vertically arranged and welded to the longitudinal end of the center plate and the joint plate. comprising a reinforcing plate disposed at a corner formed by the longitudinal end of the central plate and the joint plate,
The steel plate for a structural material according to claim 1 or 2, wherein the reinforcing plate is welded to the center plate and the joint plate, respectively. Applied to a structural steel plate having a body that can be incorporated into a structure and surrounded by a stiffener made of wood material,
The main body of the steel plate is formed by welding joining plates having a width larger than the center plate to both longitudinal ends of a center plate having a predetermined length and width. After welding the joint plates to both ends of the center plate in the longitudinal direction, the end plates are arranged so as to be perpendicular to the longitudinal ends of the center plate and the joint plate and to straddle them. 5. The method of manufacturing a steel plate according to claim 4, wherein the steel plate is formed by welding the end plates to the longitudinal ends of the center plate and the joint plate. After welding the joining plates to both longitudinal ends of the center plate, a reinforcing plate is placed at a corner formed by the longitudinal ends of the center plate and the joining plate, and the reinforcing plate is welded to the center plate. performing a reinforcing plate welding step of welding the plate and the joint plate, respectively;
After the reinforcing plate welding process, an end plate is arranged perpendicularly to the longitudinal end of the center plate and the joint plate and straddles both, and the end plate is attached to the center plate. 5. The method of manufacturing a steel plate according to claim 4, wherein the steel plate is formed by performing an end plate welding step of welding the longitudinal ends of the plate to the joint plate.

Images