JP4414832B2 - Seismic walls using corrugated steel plates with openings - Google Patents

Description

  The present invention belongs to the technical field of earthquake-resistant walls using corrugated steel plates that can control or suppress the seismic response and wind load response of structures, and more specifically, a column / beam frame or a column / slab frame. It is related with the earthquake-resistant wall which made it possible to install an opening part in the corrugated steel plate incorporated in the plane of the.

Conventionally, a cast-in-place concrete structure or a precast concrete wall structure is generally employed as the earthquake resistant wall. However, it is difficult to control the strength and rigidity of a concrete wall, and it is difficult to expect deformation ability while maintaining a predetermined strength. This is because increasing the amount of reinforcing bars or increasing the wall thickness to increase the strength inevitably increases the rigidity and also increases the rigidity against the out-of-plane force. In addition, the concrete wall is very heavy, and the problem that the load of the structure on the frame becomes large cannot be overlooked.
Therefore, the performance required for the shear wall is to design the rigidity and strength appropriately without increasing the weight of the frame. In other words, the strength against seismic force is high, and the deformation performance (toughness) is high with high strength. To meet the variable stiffness function.

  In consideration of these factors, the shear walls and damping walls of Non-Patent Documents 1 and 2 previously filed by the applicant of the present application have the shear strength and rigidity against in-plane bending and shearing of the corrugated steel sheet. In order to take advantage of the mechanical properties of large, high rigidity and strength design freedom, and low resistance to vertical axial force and bending force in the out-of-plane direction, the corrugated steel plate is constructed with its folding line arranged horizontally. It is incorporated in the surface of a pillar / beam frame or pillar / slab frame (including the core part) of the object, it can be expected to have sufficient deformation performance while maintaining a certain strength, and it is lightweight and easy to install on site. Walls and damping walls have been proposed.

  Several inventions using corrugated steel sheets are also disclosed. For example, in the following Patent Document 1, a deck plate (corrugated steel plate) is incorporated in the plane of a column / beam frame in such a manner that the corrugated streak is in the horizontal direction, and the upper edge and the left and right edges are attached to the column beam. A plate-made disaster barrier is disclosed.

  Further, Patent Document 2 discloses an opening structure of a corrugated sheet structure in which rectangular corrugated openings such as windows are provided in a corrugated sheet structure constructed of corrugated sheets (corrugated steel sheets).

Japanese Patent Application No. 2004-42196 Japanese Patent Application No. 2004-42223 JP 2003-176582 A Japanese Patent No. 3506528

  In the above-mentioned Non-Patent Documents 1 and 2, the configuration for improving the vibration control performance and the earthquake resistance performance using the mechanical characteristics of the corrugated steel plate is notable. However, all have a configuration in which a so-called opening such as a window or a door is not provided. Therefore, the installation location of the corrugated steel sheet is limited, and the mechanical properties of the corrugated steel sheet cannot be fully exerted on the entire structure. In addition, there is a problem that the degree of freedom of design is limited.

  The invention of Patent Document 1 also has a configuration in which a corrugated steel plate is mounted in the plane of the column / beam frame. This corrugated steel plate is originally a disaster-preventing wall mounted for the purpose of preventing fires and other disasters. is there. Therefore, this structure cannot be applied to a seismic wall intended to exhibit a seismic function during vibration. Moreover, it is not the structure which provides an opening part.

  In the invention of Patent Document 2 in which an opening is provided in a corrugated steel sheet, an opening is provided in a desired location of a corrugated sheet structure constructed by corrugated sheets (corrugated steel sheets). It cannot be applied to corrugated steel sheets incorporated in the frame or in the plane of columns / slab frames.

  The object of the present invention is to make it possible to implement a seismic wall using corrugated steel plates even in a frame where an opening is required, and can be applied to existing structures, realizing a reduction in the weight of the frame of the structure, and The purpose is to provide a seismic wall that improves the degree of freedom of design.

As means for solving the above-mentioned problems of the prior art, a seismic wall using a corrugated steel sheet having an opening according to the invention described in claim 1 is:
The corrugated steel plate has its folds oriented in the horizontal direction and resists horizontal shearing force in the plane of the column / beam frame or column / slab frame that generates inter-layer deformation by horizontal force, but it is resistant to vertical shear force and out of plane. The resistance to bending in the direction is incorporated so that horizontal force can be transmitted in a small configuration,
An opening is formed in the corrugated steel sheet, and a frame frame made up of a vertical stiffening plate and a horizontal stiffening plate is assembled at the mouth edge of the opening.

The earthquake-resistant wall using the corrugated steel sheet having the opening according to the invention described in claim 2 is:
Corrugated steel sheet is placed in the plane of the core column / beam frame or column / slab frame that generates inter-layer deformation by horizontal force. And the resistance to bending in the out-of-plane direction is incorporated so that a horizontal force can be transmitted in a small configuration,
An opening is formed in the corrugated steel sheet, and a frame frame made up of a vertical stiffening plate and a horizontal stiffening plate is assembled at the mouth edge of the opening.

Invention of Claim 3 is in the earthquake-resistant wall using the corrugated steel plate which has the opening part described in Claim 1 or 2,
The corrugated steel sheet incorporated in the plane of the column / beam frame or the column / slab frame is disposed along the corrugated steel sheet arranged along the vertical side of the opening and the horizontal side above or below the opening. Consists of corrugated steel plates, stiffening plates are assembled along the vertical and horizontal sides of the opening, and the horizontal shearing force borne by the corrugated steel plates is resisted by the vertical and horizontal stiffening plates and transmitted to the frame It is characterized by that.

Invention of Claim 4 is in the earthquake-resistant wall using the corrugated steel plate which has the opening part described in Claim 1 or 2,
The corrugated steel sheet arranged along the vertical side is characterized by using a corrugated steel sheet having a large thickness or a high strength so as to have a shear strength substantially equivalent to that of a standard steel sheet.

The earthquake-resistant wall using the corrugated steel sheet having the opening according to the invention described in claims 1 to 4 has the following effects.
(1) Since a seismic wall using a corrugated steel plate can be realized even in a frame surface that requires an opening, the mechanical properties of the corrugated steel plate can be fully exerted on the entire structure and the seismic performance can be improved.
(2) Since a corrugated steel plate that is lighter than a concrete wall can be disposed on the entire structure, the weight of the structure can be reduced.
(3) Since the installation location of the corrugated steel sheet is not limited, the degree of freedom in design is improved.
(4) Since the corrugated steel plate can be easily attached and detached, the corrugated steel sheet can be applied not only to the workability but also to existing structures.

  The corrugated steel sheet 5 has its fold line oriented in the horizontal direction and resists the horizontal shearing force in the plane of the column / beam frame or the column / slab frame that generates the interlayer deformation by the horizontal force, but the vertical axial force and surface In this configuration, horizontal force can be transmitted in a configuration with low resistance to outward bending.

  An opening 4 is formed in the corrugated steel plate 5, and a frame frame 40 including a vertical stiffening plate 41 and a horizontal stiffening plate 42 is assembled at the mouth edge of the opening 4.

  FIG. 1 shows an embodiment of a seismic wall using a corrugated steel plate having a window-shaped opening. FIG. 2 shows an example of a seismic wall using a corrugated steel plate having a door-shaped opening. These are representative examples of a column / beam frame 1 or a column / slab frame 1 (hereinafter simply referred to as frame 1) that generates an interlayer deformation by a horizontal force.

  1 and 2 are substantially the same technical idea, FIG. 1 will be described in detail, and FIG. 2 will be described in order only with respect to differences from FIG.

  In the present invention, as shown in FIG. 1, a corrugated steel plate 5 has its folding line in a horizontal direction in a plane of a frame 1 composed of columns 2 and 2 on both sides and upper and lower beams (hereinafter also including slabs) 3 and 3. And the horizontal shearing force is resisted, but the vertical axial force and the resistance to bending in the out-of-plane direction are small, so that the horizontal force can be transmitted. In particular, the corrugated steel plate 5 has an opening 4. It is formed.

The corrugated steel sheet 5 incorporated in the surface of the frame 1 is formed of a corrugated steel sheet 50 disposed along the vertical side of the opening 4 and a corrugated steel sheet 51 disposed along the horizontal side of the opening 4. ing. A frame frame 40 including a vertical stiffening plate 41 and a horizontal stiffening plate 42 is assembled at the mouth edge of the opening 4 along the vertical and horizontal sides.
The frame frame 40 in the case of the door-shaped opening 4 shown in FIG. 2 does not need to be actively installed because the beam 3 is substituted for the lower lateral stiffening plate 42 as in the illustrated example. Of course, it can also be installed as required.

  The corrugated steel plates 50 and 50 are welded and joined in such a manner that the vertical stiffening plates 41 and 41 on both sides and the creases thereof are in the horizontal direction. Similarly, the corrugated steel plates 51, 51 are welded together in such an arrangement that the upper and lower horizontal stiffening plates 42, 42 and their folds are in the horizontal direction. Further, the corrugated steel plate 50 and the corrugated steel plate 51 are connected by welding their contact sides. With the configuration as described above, the horizontal shearing force applied by the corrugated steel plates 50 and 51 is resisted by the vertical and horizontal stiffening plates 41 and 42 and transmitted to the frame 1 (invention according to claim 3). In the case of the door-shaped opening 4 in FIG. 2, the corrugated steel plate 51 is disposed only upward and is welded to only the upper lateral stiffening plate 42.

  The corrugated steel plate 50 arranged along the vertical side of the opening 4 has a smaller cross-sectional area by the amount of the opening 4 than the corrugated steel plate 51 and has a low shear strength. Therefore, it is more preferable to maintain a sufficient shear strength by increasing the thickness of the corrugated steel plate 51 so that the shear strength is substantially equal to that of the corrugated steel plate 51 or by using a corrugated steel plate having high strength.

  Of course, when the main purpose is to absorb the energy by yielding the vertical axial force and the bending in the out-of-plane direction at an early stage with the corrugated steel sheet 50, it is also possible to use the corrugated steel sheet 51 having the same proof strength. .

The corrugated steel plate 50 and the corrugated steel plate 51 are formed in a folded plate shape, and the shape thereof is formed in, for example, a rectangular wave shape to obtain mechanical characteristics. The cross-sectional shape of the corrugated steel plate 4 is not limited to this, and can be implemented in various shapes as shown in FIGS.
As a mechanical characteristic, each of the corrugated steel sheet 51 and the corrugated steel sheet 50 that is a folded plate sufficiently resists the shearing force with respect to the horizontal shearing force. Resist enough to force. It has a sufficiently high shear strength as compared with the RC wall, and exhibits a property excellent in toughness such that the deformation proceeds while maintaining the shear strength, thereby enabling a high deformation performance.

  In addition to the strength inherent to the material of the steel sheet, the shear rigidity and strength are the thickness (typically about 9 mm to 22 mm), the number of superimposed sheets, the pitch (typically about 500 mm to 700 mm), and the wave height ( It is possible to design freely according to the design such as (typically about 80 mm to 150 mm).

  Further, since the corrugated steel plate 50 and the corrugated steel plate 51 are folded plates, the vertical axial force perpendicular to the corrugated streak freely expands and contracts like an accordion, and the rigidity proof stress is much smaller. Similarly, bending and bending within the corrugated surface can be freely expanded and contracted like an accordion to allow compression and tension, so that rigidity and yield strength are small. On the other hand, the rigidity and proof stress against the out-of-plane force (bending and shearing) in the direction perpendicular to the corrugated folding line is sufficiently large because it is a folded plate, but the out-of-plane force (bending and shearing) in the direction parallel to the corrugating folding line. ) Exhibits a mechanical characteristic that resistance is reduced because it is a folded plate. Moreover, since the corrugated steel plates 50 and 51 are lighter than the PC wall, the weight of the entire structure can be reduced.

Next, a method for joining the corrugated steel plate 5 having the opening and the frame 1 will be described.
In the case where the column 2 and the beam 3 of the frame 1 are reinforced concrete structure, steel reinforced concrete structure, or steel structure, which is on-site, it is known as a conventional technique and is not shown in the figure. By providing a shear transmission element such as a pillar / beam frame or a concrete part of a column / slab frame, an embedded horizontal force can be transmitted. Furthermore, it is also conceivable to provide a slit that allows interlaminar shear deformation, or to fill the slit with a shear absorbing member such as a foamed polystyrene molded product.

  In the case where the column 2 and the beam 3 of the frame 1 are precast reinforced concrete, steel reinforced concrete, or steel frame, they are also known in the art and are not shown in the figure. The joint member and the peripheral portion of the corrugated steel plate 5 are joined together by means such as bolting or welding so that a horizontal force can be transmitted.

  Therefore, the shear wall of the present invention can be implemented using a corrugated steel plate even in the frame where the opening is to be installed by the simple method as described above, and the mechanical properties of the corrugated steel plate are limited to the entire structure. It can be freely used without any problems, and the seismic performance and seismic performance can be improved. Further, not only the work efficiency is improved, but also the removal can be easily performed and it can be carried out on the existing structure.

  As another embodiment of the method of joining the corrugated steel plate 5 having the opening made of the corrugated steel plate 50 and the corrugated steel plate 51 and the frame 1, the corrugated steel plate 5 and the frame 1 are composed of the columns 2 or the beams 3 forming the frame 1. It is also possible to provide a shearing force transmission element 6 such as a stud only on at least one of them and to join the shearing force transmission element 6 and the corrugated steel plate 5 so as to be able to transmit a horizontal force. Then, since a joining process decreases, construction efficiency improves. Hereinafter, it is described in advance that the third to fifth embodiments can be joined to the column or the beam by the shear force transmitting element 6 in the same manner.

  FIG. 3 shows a third example of a seismic wall using a corrugated steel plate 5 having an opening 4. That is, the corrugated steel plate 5 and the frame 1 are formed by forming a joining frame frame 52 on the outer periphery of the corrugated steel plate 5 composed of the corrugated steel plate 50 and the corrugated steel plate 51, and a shear transmission element 6 such as a stud on the inner peripheral surface on the frame side. The shearing force transmitting element 6 and the frame frame 52 for joining the corrugated steel plates 5 are joined so as to be able to transmit a horizontal force.

  FIG. 4 shows a fourth example of a seismic wall using a corrugated steel plate 5 having an opening 4. That is, when the column 2 and the beam 3 of the frame 1 are precast reinforced concrete, precast steel reinforced concrete, or steel frame, the frame frame 7 that is previously joined to the inner peripheral surface of the frame 1 via the shear force transmitting element 6 is embedded. Leave in. The outer periphery of the corrugated steel plate 5 is formed with a joining frame frame 52 as in the third embodiment, and the joining frame frame 52 is fitted into the frame 7 frame, and both are fixed by bolting or welding. The In the case of an existing structure, an anchor bolt or the like is driven toward the column 2 and beam 3 of the frame 1, and the frame frame 7 is joined by bolting or the like.

FIG. 5 shows a fifth example of a seismic wall using a corrugated steel plate 5 having an opening 4. That is,
In the corrugated steel plate 5 and the frame 1, a joining frame frame 52 provided on the outer periphery of the corrugated steel plate 5 is incorporated in the surface of the frame 1, and a nut 60 is embedded in the inner peripheral surface of the frame 1 in advance. The joining frame 52 is fixed by a bolt screwed into the nut 60.

FIG. 6 shows an example of a seismic wall using a corrugated steel sheet having an opening according to claim 2. Since the sixth embodiment is based on substantially the same technical idea as the first embodiment, the following description will focus on the differences between the two.
The sixth embodiment is characterized in that the corrugated steel sheet 5 having an opening made of the corrugated steel sheet 50 and the corrugated steel sheet 51 is implemented in the plane of the core column 20 and the core beam 30 frame 1 of the core part R. As a method of joining the frame 1 and the corrugated steel plate 5 having the opening 5, any one of the methods described in Examples 1 to 5 is performed.

  In the case where the corrugated steel plate 5 has a configuration in which the corrugated steel plates 5 are stacked in the vertical direction of the core portion R, the shear force transmitting element 6 such as a stud is provided on the core column 20 of the core portion R, and the shearing is performed. The force transmission element 6 and the vertical side of the corrugated steel plate 5 are joined so that a horizontal force can be transmitted.

  The embodiments have been described below with reference to the drawings. However, the present invention is not limited to the illustrated embodiments, and changes in design and application variations that are usually performed by those skilled in the art without departing from the technical spirit of the invention. I mention it just in case.

It is the figure which showed the example implemented to the window-type opening part of the earthquake-resistant wall using the corrugated steel plate which has an opening part which concerns on this invention. It is the figure which showed the example implemented to the door-shaped opening part of the earthquake-resistant wall using the corrugated steel plate which has an opening part which concerns on this invention. It is the figure which showed Example 3 of this invention. It is the figure which showed Example 4 of this invention. It is the figure which showed Example 5 of this invention. It is the figure which showed Example 6 of this invention. AD is explanatory drawing which showed the different cross-sectional shape of a corrugated steel plate.

Explanation of symbols

1 frame 2 pillar 20 core pillar 3 beam (or slab)
4 Opening 40 Frame frame (opening side)
41 Vertical stiffening plate 42 Horizontal stiffening plate 5 Corrugated steel plate 50 Corrugated steel plate (up or down)
51 Corrugated steel sheet (both sides)
52 Frame (corrugated steel plate side)
6 Shear force transmission element (stud)
7 Frame frame (frame side)

Claims (4)

The corrugated steel plate has its folds oriented in the horizontal direction and resists horizontal shearing force in the plane of the column / beam frame or column / slab frame that generates inter-layer deformation by horizontal force, but it is resistant to vertical shear force and out of plane. The resistance to bending in the direction is incorporated so that horizontal force can be transmitted in a small configuration,
The corrugated steel sheet has an opening, and a corrugated plate having an opening is formed by assembling a frame frame composed of a vertical stiffening plate and a horizontal stiffening plate at a mouth edge of the opening. Seismic wall using steel plate. Corrugated steel sheet is placed in the plane of the core column / beam frame or column / slab frame that generates interlayer deformation due to horizontal force. And the resistance to bending in the out-of-plane direction is incorporated so that a horizontal force can be transmitted in a small configuration,
The corrugated steel sheet has an opening, and a corrugated plate having an opening is formed by assembling a frame frame composed of a vertical stiffening plate and a horizontal stiffening plate at a mouth edge of the opening. Seismic wall using steel plate.   The corrugated steel sheet incorporated in the plane of the column / beam frame or the column / slab frame is disposed along the corrugated steel sheet arranged along the vertical side of the opening and the horizontal side above or below the opening. Consists of corrugated steel plates, stiffening plates are assembled along the vertical and horizontal sides of the opening, and the horizontal shearing force borne by the corrugated steel plates is resisted by the vertical and horizontal stiffening plates and transmitted to the frame A seismic wall using a corrugated steel sheet having an opening according to claim 1 or 2, wherein   The corrugated steel sheet disposed along the vertical side is made of a corrugated steel sheet having a large thickness or a high strength so as to have a shear strength substantially equivalent to that of a standard steel sheet. Or the earthquake-resistant wall using the corrugated steel plate which has the opening part described in 2.

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