JP2004316175A - Frame structure of rigid frame building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame structure of a rigid frame building, which has large-span trough columns, and can form a large opening in the building by reinforcing the columns in a simple structure. <P>SOLUTION: The frame structure A of the rigid frame body is constructed by erecting the trough columns 2 on a foundation 1, and horizontally erecting a lower-story beam 3 and an upper-story beam 3 between the continuous columns. In the frame structure, reinforcing columns 4 are erected at side locations of the respective through columns 2 so as to be adjacent to the same, on a lower story or an upper story. Then upper and lower edges of each reinforcing column 4 is fixed to the lower-story beam 3 and the foundation 1, or to the upper- and lower-story beams 3, and the through column 2 and the reinforcing column 4 adjacent to each other are connected together via a connection fitting 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a frame structure of a building having a ramen structure.
[0002]
[Prior art]
Conventionally, as shown in FIG. 7, a frame A having a ramen structure in which a lower beam 3 and an upper beam 3 are erected between through pillars 2 erected on a foundation 1 (in FIG. 3 is omitted in the drawing), a load-bearing wall panel 20 is attached between the lower beam 3 and the foundation 1 or between the upper and lower beams 3 in order to reinforce the frame structure A. (See, for example, Patent Document 1, Patent Document 2, and Patent Document 3)
However, in the above-described conventional example, since the load-bearing wall panel 20 is attached between the lower beam 3 and the foundation 1 or between the upper and lower floor beams 3, the reinforcing wall panel 20 can be reinforced by the load-bearing wall panel 20, As shown in FIG. 7, there is a problem that the opening width L becomes narrow.
[0003]
In particular, in a building with a small frontage (for example, 6P; P is a module size, 900 mm in an example), a large opening is formed between the through pillars 2 on the first floor portion of the frontage, and the entrance is formed in the large opening. Even if it is attempted to form a garage continuously, if the load-bearing wall panel 20 is provided on the first floor portion of the frontage as described above, the substantial opening width becomes narrow, and it is impossible to form the garage and the entrance continuously. There's a problem. Therefore, in such a case, it is necessary to realize a large opening on the first floor of the frontage by eliminating the load-bearing wall panel 20 by using a special throughpost 2 having a large cross section and a high strength as the through columns 2 on both sides of the narrow frontage. was there.
[0004]
[Patent Document 1]
JP-A-10-131386 [Patent Document 2]
JP-A-10-280527 [Patent Document 3]
Japanese Patent Application Laid-Open No. 2001-152577
[Problems to be solved by the invention]
The present invention has been made in view of the above point, and an object of the present invention is to provide a frame structure of a building having a ramen structure capable of realizing a large opening by reinforcing with a simple configuration in a case where a large span is provided between through columns. It is assumed that.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a frame structure of a building having a ramen structure according to the present invention is a frame having a ramen structure in which a lower beam 3 and an upper beam 3 are erected between through columns 2 erected on a foundation 1. In the body A, a reinforcing column 4 is erected adjacent to the side of the through column 2 on the lower floor or upper floor, and the upper and lower ends of the reinforcing column 4 are connected to the lower beam 3 and the foundation 1 or upper and lower floor beams. 3 and is formed by connecting adjacent through columns 2 and reinforcing columns 4 by connecting metal fittings 5.
[0007]
With such a configuration, when a large span is provided between the through pillars 2, the reinforcing pillars 4 are erected adjacent to the through pillars 2 and connected by the connecting metal fittings 5, thereby reinforcing with the conventional load-bearing wall panels. A large opening can be realized as compared with the one. Moreover, since the adjacent through column 2 and the reinforcing column 4 are connected by the connecting bracket 5, when a certain force or more acts on the through column 2 or the reinforcing column 4, the connecting bracket 5 is deformed to absorb this force. This can prevent the through column 2 or the reinforcing column 4 from being damaged.
[0008]
Also, a plurality of reinforcing columns 4 are juxtaposed adjacently to the side of the through column 2, the adjacent through columns 2 and the reinforcing columns 4 are connected by connecting metal fittings 5, and the adjacent reinforcing columns 4 are connected by another connecting metal fitting 5. It is preferred that they be linked by
[0009]
By arranging a plurality of reinforcing columns 4 adjacent to the through columns 2 in this manner, necessary reinforcement can be easily performed, and a large opening can be realized.
[0010]
Also, a horizontal piece 6 is provided above or below the vertical piece 10, and a fixing vertical piece 12 for fixing to the through pillar 2 or the reinforcing pillar 4 is provided on both sides of the vertical piece 10. Are integrally surrounded by the horizontal piece 6 and the fixing vertical pieces 12 on both sides to form the connecting metal fitting 5, and the vertical piece 10 of the connecting metal fitting 5 has a constant force acting on the connecting metal fitting 5 from the through pillar 2 or the reinforcing pillar 4. In this case, it is preferable that the excessive force absorbing portion 7 be plastically deformed.
[0011]
With such a configuration, when a certain force or more acts on the through pillar 2 or the reinforcing pillar 4, the vertical piece 10, which is the excessive force absorbing portion 7 of the connection fitting 5, is plastically deformed by a shearing force and absorbs this force. It is possible to constitute a connecting metal fitting 5 which is deformed when a certain force or more acts on the through pillar 2 or the reinforcing pillar 4 and absorbs the force with a simple configuration. When it is obtained, the load may be reduced due to buckling. However, the periphery of the vertical piece 10 of the connection fitting 5 is integrally surrounded by the upper to lower horizontal pieces 6 and the fixing vertical pieces 12 on both sides. Even if the vertical piece 10 buckles due to shearing force, the load between the surrounding horizontal piece 6 and the fixing vertical piece 12 does not cause a drop in load, and the gap between the vertical piece 10 and the reinforcing column 4 is small. To obtain stable plastic deformation performance It is those that can be.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0013]
On the foundation 1, a through pillar 2 is erected. The through column 2 is composed of a square steel pipe having a rectangular cross section. A column base 8 is fixed to the lower end of the square steel pipe, and the column base 8 is fixed to an anchor bolt planted on the foundation 1. By doing so, it is erected on the foundation 1. Both ends of a lower beam 3 made of a steel material having an H-shaped cross section are fixed between fixing members such as bolts and nuts between intermediate portions in the vertical direction of the through column 2. , Both ends of the beam 3 on the upper floor are fixed by fixing means such as bolts and nuts to form a frame A having a rigid frame structure.
[0014]
On the lower floor or the upper floor, a reinforcing column 4 is erected adjacent to the side of the through column 2 through a small gap 9 which is the same as the width of a connecting fitting 5 described later. It is fixed to the lower beam 3 and the foundation 1 or the upper and lower beams 3.
[0015]
The reinforcing column 4 is formed of a square steel pipe having the same cross section as the through column 2. In the embodiment of FIG. 4, a column base 8 'is fixed to the lower end of the rectangular steel pipe. The embodiment shown in FIG. 1 shows an example in which a reinforcing column 4 is erected adjacent to the side of the through column 2 on the lower floor, and a column base 8 ′ at the lower end of the reinforcing column 4 is planted on the foundation 1. The upper end of the reinforcing column 4 is fixed to the lower beam 3 by a fixing means such as a bolt.
[0016]
A connecting fitting 5 is disposed in a small gap 9 between the through pillar 2 and the adjacent reinforcing pillar 4, and the through pillar 2 and the reinforcing pillar 4 are connected by the connecting fitting 5. The connecting fitting 5 is as shown in FIG. 3, and the horizontal pieces 6 are provided above and below the vertical pieces 10 (in the embodiment, the horizontal pieces 6 are provided above and below, but the horizontal pieces 6 may be provided either above or below the vertical pieces 10). The vertical piece 10 has a U-shaped vertical section, and the vertical piece 10 and the vertical piece 10 for fixing, which is perpendicular to the vertical piece 10 and the upper and lower horizontal pieces 6, are provided on both sides of the vertical piece 10. The fixing vertical piece 12 is fixedly attached to the upper and lower horizontal pieces 6 and the vertical pieces 10, and the fixing vertical piece 12 is provided with a bolt insertion hole 13.
[0017]
The width between the two fixing vertical pieces 12 is that the connecting work between the connecting fitting 5 and the through pillar 2 by the bolt 14 and the connecting work between the connecting fitting 5 and the reinforcing pillar 4 by the bolt 14 are performed between the two fixing vertical pieces 12. As shown in FIG. 2 (a), the fixing vertical pieces 12 at both ends of the connecting metal fitting 5 are fixed to the side faces of the through column 2 and the reinforcing column 4 by bolts 14, respectively. In this way, the upper and lower ends of the reinforcing column 4 fixed to the lower beam 3 and the foundation 1 or the upper and lower beams 3 are connected to the column 2 in the vertical direction.
[0018]
Here, in the construction, after erecting the through column 2 to which the connecting metal member 5 is fixed in advance (or after fixing the connecting member 5 to the erecting through column 2 with the bolt 14), the erecting of the reinforcing column 4 is performed. When the reinforcing column 4 is fixed to the connecting metal 5 with bolts 14 or the reinforcing column 4 to which the connecting metal 5 is fixed in advance by bolts 14 is erected adjacent to the through column 2, the connecting metal 5 is attached to the through column 2. After fixing the through-hole 2 and the reinforcing column 4, the connecting fitting 5 is fitted into a small gap 9 between the through-column 2 and the reinforcing column 4, and the connecting fitting 5 is connected to the through-column 2 and the reinforcing column 4 respectively. It may be fixed by bolts 14.
[0019]
As described above, the reinforcing columns 4 are erected adjacent to the side of the through columns 2 on the lower floor or the upper floor, and the upper and lower ends of the reinforcing columns 4 are connected to the lower beams 3 and the foundations 1 or upper and lower beams 3. By connecting the adjacent through pillars 2 and the reinforcing pillars 4 with the connecting metal fittings 5, the span between the opposed through pillars 2 can be reinforced by the reinforcing pillars 4 even if the span between them is large. When a certain force or more acts on the through pillar 2 or the reinforcing pillar 4, the connecting fitting 5 undergoes plastic deformation and absorbs seismic energy to prevent the through pillar 2 and the reinforcing pillar 4 from being damaged. In the embodiment shown in the figure, the vertical piece 10 of the connection fitting 5 serves as an excessive force absorbing portion 7 that is plastically deformed by a shearing force when a predetermined force or more acts on the through column 2 or the reinforcing column 4.
[0020]
FIG. 5 is a graph showing the results of a horizontal pressure test on the frame A of the present invention shown in FIG. 1, and the vertical pieces 10 constituting the excessive force absorbing portion 7 of the connection fitting 5 are obtained by the horizontal pressure test. FIG. 2 (b) shows the result of the plastic deformation caused by the shearing force. As can be seen from FIGS. 5 and 2 (b), the strength of the vertical piece 10 constituting the excessive force absorbing portion 7 does not decrease at a stretch even after the point A in FIG. 5 as shown in FIG. 2 (b). Excessive force is absorbed by plastic deformation. Here, when plastic deformation is possible by shearing force, the load may be reduced due to buckling. However, the circumference of the vertical piece 10 of the connecting metal fitting 5 includes the upper and lower horizontal pieces 6 and the fixing vertical pieces on both sides. 12 and the gap between the through column 2 and the reinforcing column 4 is small, so that even if the vertical piece 10 buckles due to shearing force, the restraining force by the surrounding horizontal piece 6 and the fixing vertical piece 12. As a result, a stable plastic deformation performance can be obtained even with repeated deformation without causing a load drop, and as a result, the deformation capacity (stickiness) of the through column 2 and the reinforcing column 4 constituting the frame A can be obtained. And a tough structure that easily absorbs seismic energy can be obtained.
[0021]
Therefore, in the present invention, the reinforcing columns 4 are erected adjacent to the side of the through columns 2 on the lower floor or the upper floor, and are not reinforced by the load-bearing wall panels as in the prior art. The ends are fixed to the lower beam 3 and the foundation 1 or the upper and lower beams 3, and the adjacent through pillars 2 and reinforcing pillars 4 are connected by the connecting fittings 5. For example, in a building with a narrow frontage, the through pillar is used. Even if a large span (for example, 6P = 5400 mm) is provided between the reinforcing columns 4 as described above, the width between the reinforcing columns 4 erected adjacent to the through columns 2 becomes the actual width of the opening, A large aperture can be realized. For example, the actual opening width L in FIG. 1 can be set to 5.5P, and in a building with a small frontage, for example, it is possible to continuously form an entrance and a garage in front of the frontage. .
[0022]
FIG. 6 shows another embodiment of the present invention. In the present embodiment, a plurality of reinforcing columns 4 are juxtaposed adjacently to the side of the through column 2, and the adjacent through columns 2 and reinforcing columns 4 are connected by connecting metal fittings 5 and adjacent reinforcing columns 4 are connected to each other. Are connected by another connection fitting 5. As described above, the plurality of reinforcing columns 4 are arranged in parallel, the adjacent through columns 2 and the reinforcing columns 4 are connected by the connecting metal fittings 5, and the adjacent reinforcing columns 4 are connected by the other connecting metal fittings 5. The reinforcement can be easily performed, and a large opening can be realized as compared with the case where a load-bearing wall panel is used.
[0023]
In the embodiment shown in FIGS. 1 and 6 described above, an example is shown in which one or a plurality of reinforcing columns 4 are erected adjacent to the opposing through columns 2, respectively. One or a plurality of reinforcing columns 4 may be erected adjacent only to the second column 2, and the through columns 2 and the reinforcing columns 4 (and the adjacent reinforcing columns 4) may be connected by the connecting fitting 5.
[0024]
In each of the above embodiments, the reinforcing pillars 4 are erected adjacent to the side of the through pillars 2 on the lower floor and connected by the connecting metal fittings 5 so that the reinforcing pillars 4 have a large span between the through pillars 2 on the lower floor. In this example, one or a plurality of reinforcing pillars 4 are erected adjacent to the side of the through pillar 2 on the upper floor, and the through pillar 2 and the reinforcing pillar 4 (and The reinforcing columns 4 (adjacent reinforcing columns 4) may be connected to each other by the connecting metal fittings 5 to reinforce them to realize a large opening in the upper floor portion.
[0025]
The frame A having a ramen structure is not limited to a two-story structure. In the case of a frame A having a three-story or more ramen structure, a large opening is also provided on three or more floors in the same manner as described above. Can be realized.
[0026]
【The invention's effect】
As described above, in the invention according to claim 1 of the present invention, there is provided a frame of a ramen structure in which a lower beam and an upper beam are erected between through columns erected on a foundation. A reinforcement column is erected adjacent to the side of the through pillar on the floor or upper floor, the upper and lower ends of the reinforcement column are fixed to the lower floor beam and the foundation or the upper or lower floor beam, and the adjacent through pillar and reinforcement column are connected. Since the connection is made by the connection fitting, a large opening can be realized as compared with the conventional reinforcing wall panel, and furthermore, by connecting the adjacent through pillar and the reinforcing pillar with the connection fitting, the through pillar or When a force exceeding a certain level acts on the reinforcing column, the connecting bracket is plastically deformed and absorbs this force, thereby improving the deformability (sticking) of the through column or the reinforcing column and breaking even if a large seismic force acts. Can be prevented.
[0027]
Further, in the invention according to claim 2, in addition to the effect of the invention according to claim 1, a plurality of reinforcing columns are juxtaposed adjacently to the side of the through column, and the adjacent through column and reinforcing column are adjacent to each other. And the adjacent reinforcing columns are connected by another connecting bracket, so that the necessary reinforcement can be easily performed, and the opening is larger than that of the conventional reinforcing wall panel. Can be realized.
[0028]
According to the third aspect of the invention, in addition to the effects of the first or second aspect of the invention, a horizontal piece is provided above or below the vertical piece, and through columns or reinforcements are provided on both sides of the vertical piece. A fixing vertical piece for fixing to the column is provided, and the upper to lower sides and both sides of the vertical piece are integrally surrounded by the horizontal piece and the fixing vertical pieces on both sides to form a connecting fitting, and the vertical piece of the connecting fitting is If the force acting on the connecting bracket from the through column or the reinforcing column becomes more than a certain level, it becomes an excessive force absorbing part that plastically deforms, so if a certain amount of force acts on the through column or the reinforcing column with a simple configuration, the vertical piece will shear. It is plastically deformed by the force to absorb the force, and the plastic deformation is stable against repeated deformation without reducing the load due to the restraining force of the horizontal piece and the vertical piece for fixing provided around the vertical piece. It is possible to construct a connection fitting having high performance.
[Brief description of the drawings]
FIG. 1 is a front view of an embodiment of the present invention.
FIG. 2 (a) is an enlarged front view of a portion where the through column and the reinforcing column erected adjacent to the through column are connected by connecting metal fittings, and (b) is connected from the through column and the reinforcing column. FIG. 5 is an enlarged front view for illustrating a state in which a vertical piece of the connecting fitting is plastically deformed by a force of a predetermined value or more acting on the fitting.
FIGS. 3A and 3B show a connection fitting used in the above, wherein FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. 3C is a sectional view taken along line XX of FIG.
FIGS. 4A and 4B show a reinforcing column used in the embodiment, in which FIG. 4A is a side view, FIG. 4B is a plan view, and FIG. 4C is a bottom view.
FIG. 5 is a graph showing a result of a horizontal force test of the frame having the rigid frame structure according to the first embodiment.
FIG. 6 is a front view of another embodiment of the present invention.
FIG. 7 is a front view of a conventional example.
[Explanation of symbols]
A Frame structure 1 Foundation 2 Through column 3 Beam 4 Reinforcement column 5 Connecting bracket 6 Horizontal piece 7 Excessive force absorbing part

Claims (3)

A frame structure of a ramen structure in which lower-level beams and upper-level beams are installed between through-columns erected on the foundation, and reinforcing columns are erected adjacent to the side of the through-column on the lower or upper floor. And the upper and lower ends of the reinforcing columns are fixed to beams on the lower floor and the foundation or beams on the upper and lower floors, and adjacent through columns and reinforcing columns are connected by connecting metal fittings. body. A plurality of reinforcing columns are arranged side by side adjacent to the through columns, and the adjacent through columns and the reinforcing columns are connected by connecting metal fittings, and the adjacent reinforcing columns are connected by another connecting metal fitting. The frame of a building having a ramen structure according to claim 1. A horizontal piece is provided above or below the vertical piece, and a vertical piece for fixing is provided on both sides of the vertical piece for fixing to the through pillar or the reinforcing column. That the connecting piece is formed by surrounding the piece integrally, and that the vertical piece of the connecting piece is an excessive force absorbing portion that plastically deforms when the force acting on the connecting piece from the through column or the reinforcing column becomes a certain value or more. The frame structure of a building having a ramen structure according to claim 1 or 2, wherein

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