JP2004019161A - Earthquake resistant reinforcement structure for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earthquake resistant reinforcement structure for buildings such as a buildings for various kinds, living houses, or the like, which can be constructed in a short time at a low cost even when the building is being used and having the excellence in the beauty and spaciousness in relation to the earthquake resisting reinforcement structure of. <P>SOLUTION: In the earthquake resisting reinforcement structure of the building constructed by fittingly fixing a reinforced structural body 1 to the inside of an opening section A of the building to be reinforced, the reinforced structural body 1 comprises at least a frame body 2 and a large number of grid plates 3 assembled in the frame body 2 in the shape of an inclined lattice. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seismic reinforcement structure for buildings such as various buildings and houses. More specifically, the present invention relates to an earthquake-resistant reinforcement structure in which a reinforcement structure is laid in an opening of a building to reinforce the structure.
[0002]
[Prior art]
Conventionally, as a seismic reinforcement structure for a building as described above, a seismic wall is added in the building, or a reinforcing structure is fitted into an opening such as a window from the outside of the building, and this is inserted into a pillar or beam around the opening. In the building, that is, seismic reinforcement was carried out by a construction method that was carried out from the outside of the building. However, the addition of the earthquake-resistant wall as in the former case requires construction in the building, which causes problems such as generation of noise and dust, and the inability to use the building during the construction. Therefore, there is a growing demand for a construction method for constructing from the outside of the building as in the latter case, particularly in hospitals, private buildings, and government buildings.
[0003]
However, the conventional method of constructing from outside the building uses a brace B as shown in the figure generally made of an H-shaped steel as a reinforcing structure in an opening A such as a window as shown in FIG. 9, for example. He had a heavy feeling and lacked aesthetic appearance, and also had disadvantages such as a decrease in aperture ratio due to the width and thickness of the H-shaped steel, impairing the sense of openness.
[0004]
[Problems to be solved by the invention]
The present invention has been proposed in view of the above problems, and can be constructed in a short period of time and at low cost even when a building is in use, and provides seismic reinforcement of the building with excellent appearance and openness. The purpose is to provide a structure.
[0005]
[Means for Solving the Problems]
To achieve the above object, a seismic retrofit structure for a building according to the present invention has the following configuration. That is, in a seismic retrofitting structure of a building in which a reinforcing structure is fitted and fixed in an opening of a building to be reinforced, the reinforcing structure is assembled into at least a frame and an oblique lattice in the frame. And a large number of lattice plates.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a case where the earthquake-resistant reinforcement structure of a building according to the present invention is applied to an opening such as a window of an existing building will be specifically described based on an embodiment shown in the drawings.
[0007]
FIG. 1 is a front view showing an embodiment of an earthquake-resistant reinforcement structure according to the present invention, and FIGS. 2A and 2B are cross-sectional views taken along lines aa and bb in FIG. 1, respectively.
In the drawing, reference numeral 1 denotes a reinforcing structure fitted and fixed in an opening A such as a window of an existing building, and the structure 1 has four frames forming a substantially rectangular frame 2 as shown in FIG. And two or more grid plates 3 and the like assembled in the frame 2 in an oblique grid pattern. In the present embodiment, a metal strip such as a steel plate is used for the frame plates 2a to 2d and the grid plate 3, and they are integrally fixed to each other by welding or the like.
[0008]
Each of the lattice plates 3 is formed of a metal strip thinner than the frame plate 2, and the intersection of the lattice plates 3 is formed by engaging notches 3 a with each other as shown in FIG. It is welded and fixed after joining. Also, as shown in FIGS. 3 and 5, reinforcing plates 4 and 5 are stacked on the lattice plate 3 and the inner surface of the frame 2 in the vicinity of the frame 2 having a large load burden, respectively, according to the required strength. Welded.
[0009]
As shown in FIGS. 1 and 3, a stud dove 6 is planted on the outer peripheral surface of the frame 2, and a base plate 8 having a stud dove 7 mounted on the inner surface of the opening A is attached by an anchor 9 or the like. Have been. The stud dowels 6 and 7 are arranged and arranged in one or a plurality of rows in accordance with the thickness dimension of the opening A. In this embodiment, two rows are provided as shown in FIG. However, one or three or more rows may be provided.
[0010]
Further, in the present embodiment, the stud dowels 6 and 7 are arranged so as to be staggered alternately as shown in FIG. 1. As shown in (b), by filling a filler G such as non-shrinkable mortar between the periphery of the structure 1, that is, between the outer peripheral surface of the frame 2 and the inner surface of the opening A, the structure 1 is opened. It can be firmly fixed in the state where it is fitted in A.
[0011]
Next, in constructing the above-described earthquake-resistant reinforcement structure, the construction may be performed, for example, in the following manner. First, the reinforcing structure 1 as shown in FIG. 3 is manufactured according to the size of the opening to be constructed, and the processing and assembly of the members constituting the structure 1 are all performed by a factory. And so on.
[0012]
On the other hand, as shown in FIG. 6, a base plate 8 on which a stud dowel 7 is implanted in advance is fixed to an inner surface of an opening A such as a window of an existing building to be constructed by an anchor 9 or the like. In the present embodiment, small holes having a diameter of 26 mm are drilled at predetermined intervals in the inner surface of the opening A with a drill or the like, and a chemical solution for anchor fixing having a diameter of 22 mm and a length of 200 mm is provided in each of the small holes. After inserting a mortar capsule (not shown), a rod-shaped anchor 9 made of deformed reinforcing steel was driven in to break the capsule and fix the anchor 9 with mortar in the capsule. The anchor 9 was formed on the base plate 8. A nut (not shown) is screwed into a male screw formed in the anchor 9 while being inserted into the hole and tightened and fixed. It is to be noted that a conventional publicly-known expandable anchor may be used, and other appropriate ones may be used.
[0013]
With the base plate 8 on which the stud dowel 7 is implanted fixed to the inner surface of the opening A as described above, the reinforcing structure 1 is installed in the opening A as shown in FIG. The positioning is fixed at a predetermined position by the positioning and fixing means omitted. Next, as shown in FIG. 2, the stud dowel 7 and the stud dowel 6 provided on the frame 2 of the reinforcing structure 1 are embedded so that the stud dove 7 is inserted between the frame 2 and the inner surface of the opening A. What is necessary is just to fill the filler G, such as a non-shrink mortar.
[0014]
As described above, according to the present invention, the reinforcing structure 1 is fitted and fixed in an opening A such as a window of an existing building, and the structure 1 has a large number of grid plates 3 in a frame 2 in an oblique grid shape. Because of the assembled structure, the lattice plate 3 serves as a brace to provide sufficient seismic strength, and has an oblique lattice shape with an open space between the adjacent lattice plates 3,3, so that it has excellent aesthetics and openness. A seismic retrofit structure is obtained.
[0015]
The filler G may be filled between the frame 2 and the opening A after reinforcing reinforcement is provided as necessary. FIG. 8 shows an example of this, in which a plurality of, and in the case of FIG. 4, four axial bars 11 are arranged in the longitudinal direction of the space between the frame body 2 and the opening A, and these axial bars 11 are surrounded. In this manner, the hoops 12 are arranged at predetermined intervals in the longitudinal direction of the shaft 11. Particularly, in the case of the figure, a half-split split hoop streak is used as the hoop streak 12, and the split hoop streak 12 is inserted from both sides in the thickness direction of the opening A as shown by a chain line in FIG. It is only necessary to connect and fix with, and efficient construction is possible.
[0016]
Further, in the above embodiment, the stud dowel 7 is mounted on the inner surface side of the opening A in a state where the stud dowel 7 is planted in the base plate 8. However, the stud dowel 7 may be directly mounted on the inner surface of the opening A, or Instead of the stud dowel 7, an anchor or the like projecting to the inner surface side of the opening A may be driven into the inner surface of the opening at a predetermined pitch.
[0017]
【The invention's effect】
As described above, the seismic retrofitting structure according to the present invention comprises the reinforcing structure 1 at least as the frame 2 and the large number of grid plates 3 assembled in the frame 2 in an oblique grid as described above. Accordingly, the seismic strength is substantially the same as that of the conventional brace made of the H-shaped steel, and the H-shaped steel is not heavily weighted and is excellent in aesthetic appearance and openness. In other words, the use of the plate material ensures a lightweight feeling, and the diagonal grid not only functions as a diagonal plate, but also acts in the horizontal direction due to the grid connected to the plate in the event of an earthquake. It is possible to arbitrarily and effectively secure the seismic strength against both the vertical force and the vertical force. Also, the use of the plate material does not make each component itself bulky unlike the conventional H-shaped steel consisting of a web and a flange, so that it has an excellent feeling of openness, and has a design that is not heavy as an earthquake-resistant reinforcing material and has a beautiful appearance. This has the effect that an excellent reinforcing structure can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of an earthquake-resistant reinforcement structure according to the present invention.
FIGS. 2A and 2B are cross-sectional views taken along lines aa and bb in FIG.
FIG. 3A is a front view of a reinforcing structure used in the above-described earthquake-resistant reinforcing structure. (B) is the side view.
FIGS. 4A and 4B are explanatory views showing a structure for assembling a lattice plate.
FIG. 5A is an enlarged view of a part of the reinforcing structure. (B) and (c) are bb and cc line sectional views in (a).
FIG. 6 is a front view showing a state in which a stud dowel is installed in the opening.
FIG. 7 is a front view of a state in which a reinforcing structure is assembled in the opening.
FIG. 8 is a cross-sectional view of an example in which a reinforcing reinforcing bar is assembled between an opening and a reinforcing structure.
9A and 9B are explanatory views showing an example of a conventional seismic retrofit structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reinforcement structure 2 Frame 2a-2d Frame plate 3 Lattice plate 4, 5 Reinforcement plate 6, 7 Stud dowel 8 Base plate 9 Anchor 11 Axis line 12 Loop line G Filler

Claims (1)

In a seismic retrofitting structure for a building in which a reinforcing structure is fitted and fixed in an opening of a building to be reinforced, at least a frame and a large number of diagonal lattices of the reinforcing structure are assembled in the frame. A seismic retrofit structure for a building, comprising a lattice plate.

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