JP2007009621A - Antiseismic reinforcement structure of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable designing in a structure plane according to the intended use like a doorway or a path. <P>SOLUTION: An antiseismic reinforcing body 1 in the structure plane R surrounded by a frame 20 of a building comprises an outer frame 2 incorporated in the structure plane R and assembled to be a quadrangular frame, an inner frame 3 assembled to be a quadrangular frame leaving a predetermined distance from an inner periphery of the outer frame 2, and a diagonal connecting member 4 diagonally arranged by fixing an end 4a to a corner part 2a of the outer frame 2 and the other end 4b to a corner part 3a of the inner frame 3. Vertical members 2b, 3b of the outer frame 2 and the inner frame 3, respectively, are arranged substantially parallel. Effective zones M1, M2 constituting effectively usable quadrangles for the intended use are secured in the opening part 5 formed inside the inner frame 3 and on both sides thereof. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seismic reinforcement structure constructed in a construction surface surrounded by columns and beams in a building.

Conventionally, in the seismic reinforcement of an existing building, a seismic wall is constructed in a structural surface surrounded by columns and beams to increase the horizontal strength of the existing building. As a structure thereof, there is a structure in which steel braces having various shapes such as a K type and a mansard type are provided in the surface in consideration of seismic strength (for example, see Patent Document 1).
In Patent Document 1, two steel braces are arranged obliquely so as to have a substantially square shape or an upside-down substantially square shape in the composition plane, and are connected to each other in the middle of the upper or lower beam. In this seismic reinforcing structure, two steel braces are sandwiched by a scissor member made of a steel plate or the like at the connecting portion, and the scissor member is slidable in the horizontal direction along the beam. By adopting such a sliding structure, it is possible to provide a damper function for attenuating the force transmitted to the steel brace during an earthquake in the construction surface, and to improve the horizontal rigidity.
JP 2003-155836 A

  However, in patent document 1 and the conventional steel brace, in order to exhibit effective seismic performance, the steel brace is diagonally arrange | positioned over the whole construction surface. At this time, the opening part surrounded by the steel braces in the construction surface often has a substantially triangular shape that is difficult to effectively use for the purpose of the building, and is limited to the use like a window, for example. There was a drawback. That is, there has been a problem that it is difficult to design with a rectangular space necessary for an application such as an entrance and a passage in the construction surface.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a seismic reinforcement structure for a building that can be designed in accordance with uses such as an entrance and a passage in a construction surface.

In order to achieve the above object, the building earthquake-proof reinforcement structure according to the present invention is an earthquake-proof reinforcement structure constructed in a construction surface surrounded by columns and beams constituting the building, and is incorporated in the construction surface. An outer frame that is framed in a rectangular shape, an inner frame that is disposed at a predetermined interval from the whole or a part of the inner periphery of the outer frame, and that is framed so as to form a rectangular area inside, and the inner frame and the outer frame. It is characterized by comprising an oblique connecting member arranged in an oblique direction by connecting the corners with the frame.
In the present invention, the same earthquake resistant structure as that of the conventional steel brace can be realized by arranging the diagonal connecting members in the diagonal direction inside the outer frame. Then, for example, by arranging the frame material of the inner frame so as to be parallel to the outer frame, the openings formed on the inner side and the outer side of the inner frame form a quadrangle having a large opening ratio that can be effectively used as a use. An area can be secured.

Moreover, in the earthquake-proof reinforcement structure of the building which concerns on this invention, it is preferable that each vertical member of an outer frame and an inner frame is arrange | positioned substantially parallel.
In the present invention, since the vertical members of the outer frame and the inner frame are arranged substantially in parallel with a predetermined interval, an opening parallel to the vertical direction is formed inside and next to the inner frame for effective use. A possible area can be secured.

Moreover, in the earthquake-proof reinforcement structure of the building which concerns on this invention, it is preferable that the mesh member which makes | forms a plate-shaped panel or mesh shape is integrated inside the inner frame.
In the present invention, since a panel or mesh member is interposed inside the inner frame, the rigidity and proof stress of the inner frame can be improved with respect to the horizontal force received. In addition, the design is improved by arbitrarily setting the material and arrangement of the panel or mesh member.

According to the earthquake-proof reinforcement structure for a building of the present invention, it is possible to secure a region having a large opening ratio that can be effectively used as an application in the inner frame and the outer openings. For this reason, in the construction surface, for example, it is possible to perform an effective design according to the use such as an entrance / exit, a corridor (passage), a large window, and the like, and the width of the design can be expanded.
In addition, the size and arrangement of the inner frame, the size of the cross section of the steel material, the type of member, etc. can be examined and changed in accordance with the required conditions such as the strength and performance of seismic reinforcement, which enables flexible design. Become.

Hereinafter, the earthquake-proof reinforcement structure of the building by 1st embodiment of this invention is demonstrated based on FIG.
FIG. 1 is an elevation view showing a seismic reinforcement 1 according to the first embodiment.
As shown in FIG. 1, the seismic reinforcement structure for a building according to the first embodiment is a construction in which a seismic reinforcement body 1 is constructed in a construction surface R surrounded by a frame 20 composed of columns and beams.

As shown in FIG. 1, the seismic reinforcing body 1 includes an outer frame 2 incorporated in the construction surface R and framed in a quadrangular shape, and an inner frame framed in a rectangular shape at a predetermined interval from the inner periphery of the outer frame 2. The frame 3 and the diagonal connecting member 4 are arranged in an oblique direction with one end 4 a fixed to the corner 2 a of the outer frame 2 and the other end 4 b fixed to the corner 3 a of the inner frame 3. At this time, the seismic reinforcement body 1 is formed in line symmetry with respect to a center line that forms a vertical direction.
The diagonal connecting member 4 may be a general steel material such as an H-shaped steel material or an L-shaped steel material, or a member having high strength and high rigidity such as a PC steel rod or high strength steel.
The diagonal connecting member 4 and the outer and inner frames 2 and 3 are fixed by, for example, a fixing means such as a steel plate (not shown) as a connecting member and bolt fastening or welding.

  Also, as shown in FIG. 1, the seismic reinforcement 1 and the frame 20 are connected by providing a gap 21 between the outer frame 2 and the frame 20. It is done by construction with non-shrink mortar. With such a structure, the horizontal force acting on the frame 20 is transmitted to the seismic reinforcement body 1 through the gap 21.

As shown in FIG. 1, in the seismic reinforcement body 1, an oblique connecting member 4 disposed in an oblique direction via an inner frame 3 inside the outer frame 2 has a function equivalent to that of a conventional brace. In other words, when a horizontal force acts on the building during an earthquake, a horizontal force is transmitted from the frame 20 to the outer frame 2, and a horizontal proof force against the horizontal force is applied to the outer frame 2 with the diagonal connecting member 4. Given by the inner frame 3.
When a PC steel bar or high strength steel is used for the diagonal connecting material 4, prestress can be introduced into the member and an initial tension (tensile force) can be given in advance, thereby further improving earthquake resistance. An improved seismic reinforcement structure can be realized.

  Further, as shown in FIG. 1, an opening 5 surrounded by the inner and outer frames 2 and 3 and the oblique connecting member 4 is formed in the composition surface R. In addition, the vertical members 3b of the inner frame 3 and the vertical members 2b of the outer frame 2 are disposed substantially parallel to the inner frame 3 and the openings 5 adjacent to the inner frame 3, so that the effective regions M1 and M2 are provided. Is formed. These effective areas M1 and M2 are rectangular spaces having a large aperture ratio as compared with the conventional seismic reinforcement structure, and are spaces that can be effectively used for applications. The sizes of the effective areas M1 and M2 can be arbitrarily changed by changing the lengths of the vertical and horizontal members of the inner frame 3.

In the earthquake-proof reinforcement structure for a building according to the first embodiment described above, the diagonal connecting member 4 is arranged in an oblique direction inside the outer frame 2 and is connected to the inner frame 3 so that it is similar to the conventional steel brace. The effective regions M1 and M2 that can be effectively used as applications can be secured. For this reason, in the construction surface R, it can design according to uses, such as an entrance / exit, a corridor (passage), and a big window, and can expand the width | variety of a design.
In addition, the size and arrangement of the inner frame 3, the size of the cross section of the steel material, the type of member, etc. can be examined and changed according to the required conditions such as the strength and performance of the seismic reinforcement required, enabling flexible design It becomes.

Next, the second embodiment of the present invention and the first and second modifications will be described with reference to FIGS. 2 to 4, but the same or similar members and parts as those of the first embodiment described above. The same reference numerals are used to omit the description, and a configuration different from that of the first embodiment will be described.
FIG. 2 is an elevation view showing the seismic reinforcement according to the second embodiment of the present invention.
In the second embodiment, as shown in FIG. 2, the seismic reinforcement body 1 (see FIG. 1) according to the first embodiment is divided into two in the middle of the vertical direction, and the horizontal center line is formed. It is symmetrical with respect to the line.
The inner frame 3 has a U-shaped opening facing downward, and its lower end 3 c is joined to the lower cross member 2 c of the outer frame 2. The diagonal connecting members 4, 4 are provided only at the upper corners 3 a, 3 a of the inner frame 3. Thereby, it is possible to secure effective areas M3 and M4 having an area larger than that of the first embodiment in the inner frame 3 and in the openings 5 on both sides thereof.
As described above, the seismic reinforcement 1 according to the second embodiment has the same effects as the first embodiment, and the effective regions M3 and M4 are formed on the upper surface of the lower cross member 2c of the outer frame 2. Therefore, an unnecessary level difference etc. can be reduced and a space with higher applicability can be realized.

Next, a first modification and a second modification of the first and second embodiments will be described with reference to the drawings.
3 (a) and 3 (b) are elevation views showing the seismic reinforcement according to the first modification of the first and second embodiments, and FIGS. 4 (a) and 4 (b) are the second modification. It is an elevation view which shows the seismic reinforcement body by.
In the first modification shown in FIGS. 3A and 3B, a flat panel 6 such as a glass block, steel plate, concrete, plastic, or other new material is incorporated inside the inner frame 3. . The panel 6 is preferably a member having rigidity, and may be divided into a plurality of parts. Further, a transmissive panel with high design and a panel in which an opening is formed in advance may be used. In the first modification, effective areas M2 and M4 can be secured on both sides of the inner frame 3.

Moreover, the 2nd modification shown to Fig.4 (a), (b) replaces with the panel 6 (refer FIG. 3) of the 1st modification mentioned above, and consists of a member which has a steel wire, a steel bar, a fiber property, etc. A mesh member 7 in which linear members are formed in a mesh shape is incorporated inside the inner frame 3.
In the second modified example, the mesh member 7 itself has a gap, so that it is possible to realize an open and highly designable structure without a feeling of blockage.

The first and second embodiments and the first and second modified examples of the seismic reinforcing structure for buildings according to the present invention have been described above, but the present invention is limited to the above-described embodiments and modified examples. It can be changed as appropriate without departing from the scope of the invention.
For example, in the first and second embodiments, since the inner frame 3 is provided at the center in the left-right direction inside the outer frame 2, the effective areas M2 and M2 on both sides of the inner frame 3 (second embodiment) In the embodiment, M4 and M4) have the same shape, but are not limited thereto. For example, the effective area may be adjusted by moving the position of the inner frame 3 to one of the left and right directions according to the application.
Further, in the first and second modified examples, the panel 6 or the mesh member 7 is provided only on the inner side of the inner frame. However, the present invention is not limited to this. The panel 6 or the mesh member 7 may be provided in the regions M2 and M4 and other openings 5. Furthermore, you may improve design property by combining the panel 6 and the mesh member 7 arbitrarily.
Furthermore, in the first and second embodiments, the vertical member 3b of the rectangular inner frame 3 and the vertical member 2b of the outer frame 2 are provided substantially in parallel, but the shape is not necessarily limited to this shape. For example, the inner frame 3 may be a trapezoid in which the vertical members 3b are arranged obliquely.

It is an elevation view which shows the seismic reinforcement body by 1st embodiment of this invention. It is an elevation view which shows the seismic reinforcement body by 2nd embodiment of this invention. (A), (b) is an elevation view which shows the seismic reinforcement body by the 1st modification of this 1st and 2nd embodiment. (A), (b) is an elevation view which shows the seismic reinforcement body by the 2nd modification of this 1st and 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seismic reinforcement 2 Outer frame 3 Inner frame 4 Diagonal connection material 5 Opening part 6 Panel 7 Mesh member 20 Frame R Construction surface M1-M4 Effective area

Claims (3)

It is a seismic strengthening structure built in a structure surrounded by pillars and beams that make up the building,
An outer frame incorporated into the construction surface and framed into a quadrangle;
An inner frame arranged at a predetermined interval from the whole or a part of the inner periphery of the outer frame, and framed to form a rectangular region inside;
By connecting the corners of the inner frame and the outer frame to each other, an oblique connecting member disposed in an oblique direction,
A seismic reinforcement structure for buildings, characterized by comprising   The seismic reinforcement structure for a building according to claim 1, wherein vertical members of the outer frame and the inner frame are arranged substantially in parallel.   The earthquake-resistant reinforcing structure for a building according to claim 1 or 2, wherein a plate-like panel or a mesh-like mesh member is incorporated inside the inner frame.

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