JPH09328817A - Reinforcing construction of joint section and manufacturing of pipe-like body used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of reinforcing construction excellent in joint strength and rich in earthquake resistance and a pipe-like body capable of transferring efficiently stress from webs of steel framed beams to the pipe-like body in a joint section between the pipe-like body as a column member and steel framed beams. SOLUTION: Reinforcing construction 10 of a joint section 3 is so constituted that steel framed beams 2 consisting of flanges 2a and webs 2b are connected to a box column 1 as a column member. In that case, in correspondence with positions connected to the flanges 2a on the outside surfaces of the box column 1, diaphragms 4 arranged horizontally to the inside surfaces of the box column 1 and vertial stiffeners 5 arranged between the inside surfaces of the box column 1 and diaphragms 4 in correspondence with positions connected to the webs 2b of the outside surfaces of the box column 1 are provided. A pair of steel framed beams 2 are connected to a joint 3, and the vertical stiffeners 5 are so arranged that positions connecting the webs 2b on the inside surfaces of the box column 1 to them are connected to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint portion in which a column and a beam are joined together, and more particularly to a reinforcing structure for the joint portion in which a tubular column member and a steel frame beam are joined together. The present invention relates to a method for manufacturing a tubular body used for a reinforcing structure.

[0002]

2. Description of the Related Art Conventionally, in a steel frame structure, a tubular column member having a hollow interior, represented by a box column, may be used as a column member of the structure. In this tubular column member, since it is a hollow body, it is difficult to buckle, the unit weight per strength is small, and because it is possible to easily construct a composite structure with concrete by placing concrete inside, It has come to be used in a wide range of fields in recent years.

In this tubular column member, there is a method shown in FIG. 6 (a) as a method for joining a beam member, particularly a steel frame beam having an H-shaped cross section composed of a flange and a web, at a joint portion. That is, the plate-like diaphragm 62 is arranged on the inner circumference of the tubular pillar member 61 at a height that matches the position where the flange 63a of the steel frame beam 63 is joined, and the steel frame beam 6 is formed.
While the flange 63a of 3 is made to match with the diaphragm 62, the web 63b of the steel beam 63 is brought into contact with the side surface of the column member 61 to build the steel beam 63.

According to such a connecting portion, the steel beam 63
A stress such as a bending moment acting on the column member 61 can be transmitted from the flange 63 a to the column member 61 via the diaphragm 62.

[0005]

However, in the joining method using the diaphragm, a member for reinforcing the load acting on the surface of the pillar member 61 from the web 63b is provided on the pillar member 61 side. Therefore, as shown in FIG. 7C, there was a fear that the surface of the column member 61 would buckle. On the other hand, in the above joining method,
Since the diaphragm 62 bears the stress acting on the steel beam 63 via the flange 63a, the diaphragm 62
There is a fear that stress concentrates on the flange 63a and breaks these.

Therefore, conventionally, it is necessary to increase the wall thickness of the column member 61 or increase the thickness of the diaphragm 62 to improve the yield strength of the joint portion.
As a result, the amount of steel frame is increased, and the weight of each member is increased.

Therefore, the present invention has been made in view of such conventional problems, and transmits the stress from the web of the steel frame beam to the tubular body at the joint between the tubular body as the column member and the steel frame beam. It is an object of the present invention to provide a reinforcing structure for a joint portion that can prevent the flange from breaking and the joint portion from buckling. It is another object of the present invention to provide a tubular body manufacturing method capable of easily manufacturing the tubular body for constructing the reinforcing structure of the above-mentioned joint portion.

[0008]

The reinforcing structure of the joint portion of the present invention is made to achieve the above object, and its gist is to provide a steel beam composed of a flange and a web and a column member. A reinforcing structure for a connecting portion to which a tubular body is connected, corresponding to a position where the flange on the outer surface side of the tubular body is joined, and a diaphragm horizontally disposed on the inner surface side of the tubular body, The vertical stiffener is disposed between the inner surface and the diaphragm so as to correspond to the position where the web is joined on the outer surface side of the tubular body (claim 1).

According to such a reinforcing structure of the joint portion,
In the joint part where the steel beam is joined to the tubular body as the column member, for example, against the couple force such as bending moment acting on the outer surface of the tubular body from the web of the steel beam, the back surface thereof, that is, the inner surface of the tubular body By reinforcing with the vertical stiffener arranged on the side, such stress can be resisted and local buckling or the like at the joint portion of the tubular body can be prevented.

That is, the stress transmitted from the web of the steel frame beam to the surface of the tubular body is transmitted to the diaphragm horizontally arranged on the inner surface of the tubular body through the vertical stiffener provided on the inner surface of the tubular body. As a result, the web can also bear the bending moment, stress concentration on the flange can be avoided, and the risk of breakage of the flange end can be avoided.

Further, in the reinforcing structure of the joint portion, two or more steel beams are joined to the joint portion, and the vertical stiffener is joined to each web of the steel beam on the inner surface of the tubular body. It is preferable that the positions are arranged so as to connect the positions to each other (claim 2).

In such a reinforcing structure for the joint portion, even when two or more steel beams are joined to the joint portion, the reinforcing structure for the joint portion is provided through the vertical stiffener and the diaphragm arranged on the inner surface of the tubular body. The stress transmitted from each web of the steel beam can be mutually transmitted. In particular, when a pair of steel beams are linearly joined to the joint, the stress acting on one steel beam is transmitted mainly to the beam on the opposite side and, as a subordinate, to the diaphragm inside the tubular body. be able to.

Further, in the reinforcing structure of the joint portion, the vertical stiffener is divided into a plurality of upper and lower parts by slits formed along the radial direction of the tubular body (claim 3).

Thus, the slit is provided in the tubular body because the diaphragm and the vertical stiffener are inserted into the tubular body,
This is because it is necessary for attaching and joining.

On the other hand, in the method of manufacturing the tubular body used for the reinforcing structure of the joint part, a plurality of steel strips are arranged in a tubular shape, and adjacent edges of these steel strips adjacent to each other are joined to each other. When manufacturing the tubular body by doing so, the diaphragm is joined to each side surface of these steel strips that are the inner surface of the tubular body in correspondence with the position where the flange is joined, and the diaphragm and the tubular body are joined together. Between the inner surface of the body, and the vertical stiffener is joined so as to correspond to the position where the web of the steel beam is joined, the steel strips are joined at adjacent edges adjacent to each other, tubular Forming a body (Claim 4).

According to such a method for manufacturing a tubular body,
When joining the adjacent joining surfaces of the steel strips to form the tubular body, the diaphragm and the vertical stiffener are joined to the side surfaces of each steel strip in advance, so that they are joined together at the adjacent edges to form the tubular body. When the above is formed, the diaphragm and the vertical stiffener are arranged at the positions corresponding to the flange and the web of the steel beam, so that the manufacturing of the tubular body can be rationalized.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the reinforcing structure for a joint according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a reinforcement structure 1 according to a first embodiment of the present invention.
It is explanatory drawing which shows 0.

As shown in FIGS. 1 (a) and 1 (b), the reinforcing structure 10 includes a box column 1 as a tubular body having a substantially rectangular cross section, which is built as a pillar member in a steel frame structure. , The flange 2a and the web 2b and the steel beam 2 having an H-shaped cross section are provided in the joint portion 3. In the present embodiment, in the joint portion 3, four steel frame beams 2 (2A, 2B, 2C, 2D) are respectively joined to the four faces of the box column 1. Further, in this embodiment, the box column 1 is formed into a substantially rectangular shape by joining a pair of channel steels having a C-shaped cross section along the axial direction thereof.

The reinforcing structure 10 for the joint 3 is
It is roughly configured by a diaphragm 4 horizontally arranged on the inner surface side of the box column 1, and a vertical stiffener 5 arranged between the diaphragm 4 and the inner surface of the box column 1.

The diaphragm 4 is a steel plate-like member having a shape that substantially matches the inner circumference of the box column 1. In this embodiment, the inner circumference of the box column 1 is a pair of upper and lower sides. It is joined by welding or the like. In addition,
In the present embodiment, a scallop 4a is provided at the corner portion of the diaphragm 4 so as to match the R of the corner formed on the inner circumference of the box column 1.

The diaphragm 4 is arranged in the box column 1 at a position corresponding to the position where the outer flange 2a of the box column 1 is joined. That is, the diaphragm 4 sandwiches the thick portion of the box column 1 on the back side of the outer surface of the box column 1 to which the flange 2a of the steel frame beam 2 is joined,
The periphery of the flange 2a is joined to the inner peripheral surface of the box column 1 so as to match the position where the flange 2a is joined.

On the other hand, the vertical stiffener 5 and the diaphragm 4 are arranged so as to be perpendicular to the diaphragm 4.
It is a plate-shaped member made of steel joined to the inner peripheral surface of the box column 1. In the present embodiment, it is provided so as to connect these between the diaphragms 4 provided as a pair of upper and lower sides.

More specifically, the vertical stiffener 5 is a combination of four plate-shaped members in this embodiment, and the web 2b is joined to the outer surface side of the box column 1 inside the box column 1. The web 2b on the back side of the position where the web 2b is joined, corresponding to the position.
Are arranged so as to match with each other, and are arranged in a cross shape so as to connect the positions where the webs 2b of the four steel frame beams 2 are joined to each other.

According to the reinforcing structure 10 of the joint portion 1 of this embodiment, the stress transmitted from the flange 2a and the web 2b of the steel beam 2 to the outer surface of the box column 1, especially the bending moment and the like. The force is transmitted to the inner surface of the box column 1 through the diaphragm 4 and the vertical stiffener 5 arranged on the inner surface of the box column 1, so that the stress from the steel beam 2 can be transmitted to the inner surface of the box column 1, and the flange is broken. It is possible to suppress the local buckling at the joint.

In particular, in this embodiment, the box column 1
Steel beams 2 (2A, 2B, 2C, 2D) joined to
Since the vertical stiffeners 5 are arranged so as to connect the webs 2b to each other, the stress transmitted from the steel beam 2 can be transmitted to each other.

Next, a second embodiment of the reinforcing structure for the joint of the present invention will be described with reference to FIGS. 2 (a) and 2 (b). Reinforcement structure 20 of the joint portion 21 according to the present embodiment
In the above, the box column 1 is arranged, for example, at a corner of a structure, and the steel beam 2 is the box column 1.
A pair is joined to the two adjacent side surfaces of.

Then, in the inside of the joint portion 21, on the back side of the outer surface of the box column 1 where the steel beams 2 (2E, 2F) are respectively joined, the same four sheets as in the above-described embodiment are provided. A vertical stiffener 25 having a cross shape is provided by combining plate-shaped members.

As a modified example of the arrangement of the four vertical stiffeners as in the first or second embodiment described above, as shown in FIG.
The four vertical stiffeners 35 may be joined to the inner surface of the box column 1 at an angle of about 45 degrees and arranged in a diamond shape to form the reinforcing structure 30.

In this way, when the vertical stiffeners 35 are arranged in a rhombus, the couple acting on the steel beam is applied to each steel beam 2.
The vertical stiffener 35 plays a role of bracing in the box column 1 even when shearing force acts on the joint portion 31 due to deformation or displacement of the steel beam 2, as well as transmission between the two. It is possible to suppress the shear deformation of the box column 1.

The box column 1 in which the vertical stiffeners 35 are arranged in a diamond shape in this way can be manufactured by the following procedure. First, as shown in FIG. 3 (b), the diaphragm piece 4 is formed on each side surface which is the inner surface of the channel steel 1 a which is one of the steel strip-shaped pieces constituting the box column 1.
Two pieces of a are joined in parallel.

The diaphragm piece 4a is obtained by dividing the diaphragm 4 into two pieces along the radial direction of the box column 1, and when the box column 1 is built on the inner surface of the channel steel 1a. The flange 2a of the steel frame beam 2 is joined in correspondence with the position where it is joined. Next, two vertical stiffeners 35 are joined to the inner surface of the channel steel 1a at an angle of about 45 degrees between the two diaphragm pieces 4a arranged and divided in parallel.

Similarly, the other channel steel 1b (not shown)
Also, the diaphragm piece 4b and the vertical stiffener 35 are joined, and then these channel steels 1a, 1b are joined at their adjacent edges to form the box column 1 which is a tubular body.

According to the method of manufacturing the box column 1 having the above work procedure, the diaphragm pieces 4a, 4 are previously formed on the side surfaces of the channel steels 1a, 1b before joining the channel steels 1a, 1b.
Since b and the vertical stiffener 35 are joined, the manufacturing work can be rationalized.

Next, a third embodiment of the present invention will be described. The gist of the reinforcing structure 40 for the joint portion 41 according to the present embodiment is that the vertical stiffener in the first and second embodiments described above is divided into a plurality of parts, as shown in FIG.

More specifically, in the present embodiment, the box column 1 is vertically cut by the cutting portion 42 because the vertical stiffeners 45 which are respectively joined to the upper and lower diaphragms 4 and are divided into upper and lower two sheets, The slit is for welding to the inner surface of the tubular body 1, and is a slit necessary for manufacturing.

Further, a fourth embodiment of the present invention will be described. Reinforcement structure 5 of the joint portion 51 according to the present embodiment
As shown in FIG. 5, two sets of a pair of steel frame beams 2 are connected to the joint 51, that is, four steel frame beams 2 are joined to the four side surfaces of the box column 100, respectively.
The vertical stiffeners are arranged in a cross shape corresponding to the positions where are joined together, and the vertical stiffeners 55 arranged corresponding to one of the two sets of the steel beam 2 are arranged between the steel beams 2. The two are arranged in parallel.

More specifically, in this embodiment, the box column 100 has a channel steel 101, 1 having a C-shaped cross section.
02 is joined at its adjacent edge 57 to form a tubular shape. Then, the diaphragm 54 is divided into two diaphragm pieces 54a and 54b via the joint surface to which these channel steels 101 and 102 are joined, and is arranged so as to be perpendicular to the joint surface. The vertical stiffener 56 is divided with this joint surface as a boundary.
Further, the vertical stiffener 5 arranged along the joint surface.
5 is joined to each of the channel steels 101 and 102 so as to sandwich the joining surface and to be parallel to the joining surface.

The box column 100 used in the reinforcing structure 50 having such a structure is manufactured by the following procedure. First, two diaphragm pieces 54a are made parallel to each other on each side surface of the pair of channel steels 101 and 102, which is the inner surface of the channel steels 101 and 102, in correspondence with the position where the flange 2a of the steel beam 2 is joined. To join.

Next, the diaphragm piece 54a is placed between the two diaphragm pieces 54a which are arranged in parallel and divided.
The vertical stiffener 56 is joined to the inner surface of the channel steel 101 by welding or the like so as to be perpendicular to a. Then, the vertical stiffener 55 is joined to the diaphragm piece 54a and the vertical stiffener 56.

Similarly, the other channel steel 102 (not shown) also has a diaphragm piece 54b and a vertical stiffener 5.
After joining 5, 56, these channel steels 10
1 and 102 are joined to each other at their adjacent edges 57 to form a box column 100 that is a tubular body.

Box column 10 for such a work procedure
According to the manufacturing method No. 0, the diaphragm 54 and the vertical stiffeners 55, 56 are bonded to the side surfaces of the channel steels 101, 102 in advance when the channel steels 101, 102 are bonded, so that the manufacturing work can be rationalized. You can

In each of the above embodiments, the tubular body has a substantially rectangular shape, but the present invention is not limited to this, and a tubular body or a polygonal body can be used. . In this case, when manufacturing these cylindrical or polygonal tubular bodies, it is possible to arrange the belt-shaped members in an annular shape and join their adjacent edge portions to form a tubular body.

[0043]

As described in detail above, according to the reinforcing structure of the joint portion of the present invention, the tubular body inner surface side is made to correspond to the position where the flange and the web are joined on the tubular body outer surface side. Since the diaphragm and the vertical stiffener are arranged, the stress acting on the outer surface of the tubular body from the web is reduced by the vertical stiffener and the diaphragm arranged on the back surface of the tubular body, i.e., the inner surface of the tubular body. Therefore, it is possible to prevent breakage of the flange and local buckling at the joint portion of the tubular body. As a result, the joint strength of the joint portion can be improved.

Further, in the reinforcing structure of the joint portion, when two or more steel beams are joined to the joint portion, the vertical stiffener on the inner surface of the tubular body is connected to the positions where the respective webs of the steel beam are joined. If they are arranged so as to be connected to each other, the stress transmitted from each web of the steel beam is transmitted to each other through the vertical stiffener and the diaphragm disposed on the inner surface of the tubular body, thereby breaking the flange or Local buckling of the tubular body can be suppressed more reliably.

On the other hand, the tubular body used for the reinforcing structure of the above-mentioned joint is preliminarily joined to each side surface of the steel strip with a diaphragm, and a vertical stiffener is provided between the diaphragm and the inner surface of the tubular body. After joining, if these steel strips are formed by joining the adjacent strips adjacent to each other, when the steel strips are joined together at the adjacent edges to form a tubular body, these diaphragms and Since the vertical stiffener is arranged at a required position, the manufacturing of the tubular body can be rationalized.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a reinforcing structure of a joint portion according to a first embodiment of the present invention, (a) is a perspective view thereof, and (b) is a horizontal sectional view in (a). .

FIG. 2 is an explanatory view showing a reinforcing structure of a joint portion according to a second embodiment of the present invention, (a) is a perspective view thereof, and (b) is a horizontal sectional view in (a). is there.

FIG. 3 is an explanatory view showing a modified example of the first or second embodiment, (a) is a horizontal sectional view thereof, and (b).
It is explanatory drawing which shows the operation procedure of the manufacturing method of the tubular body used for this embodiment.

FIG. 4 is a side view showing a reinforcing structure for a joint according to a third embodiment of the present invention.

5 (a) and 5 (b) are explanatory views showing a reinforcing structure of a joint portion according to a fourth embodiment of the present invention, in which (a) is a horizontal sectional view thereof, and (b) of a tubular body used in this embodiment. It is explanatory drawing which shows the work procedure of a manufacturing method.

6A and 6B are explanatory views showing a conventional joint portion, in which FIG. 6A is a perspective view thereof, FIG. 6B is a side view thereof, and FIG. 6C is local buckling of a pillar member in the joint portion. It is a sectional view showing typically.

[Explanation of symbols]

 1,100 Box column (tubular body) 2 Steel beam 3,21,31,41,51 Joint part 4,54 Diaphragm 5,25,35,45,55,56 Vertical stiffener 10,20,30,40,50 Reinforcement structure 101, 102 Channel steel (steel strip)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shokichi Gokan 2-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo headquarters (72) Inventor Hideo Otsuka 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Stock Company Obayashi Corporation Tokyo Head Office (72) Inventor Yasuhiko Takahashi 4-640 Shimo-Seido, Kiyose City, Tokyo Inside Obayashi Technical Research Institute Co., Ltd. (72) Koichi Sugimoto 4-640 Shimo-Seido, Kiyose City, Tokyo Obayashi Technical Research Co., Ltd. In-house (72) Inventor Kenji Suzuki 9 Nishiki-cho, Naka-ku, Yokohama-shi, Kanagawa Nittetsu Column Co., Ltd.

Claims (4)

[Claims] 1. A steel beam comprising a flange and a web,
A reinforcing structure for a connecting portion to which a tubular body as a pillar member is connected, which is arranged horizontally on the inner surface of the tubular body in correspondence with a position where the flange on the outer surface of the tubular body is joined. And a vertical stiffener disposed between the inner surface and the diaphragm at a position where the web on the outer surface side of the tubular body is joined, the reinforcing structure for the joint portion. 2. Two or more of the steel beams are joined to the joint portion, and the vertical stiffener connects the positions at which the webs of the steel beams on the tubular inner surface are joined to each other. The reinforcing structure for a joint portion according to claim 1, wherein 3. The reinforcing structure for a joint portion according to claim 2, wherein the stiffener is divided into a plurality of upper and lower parts by slits formed along the radial direction of the tubular body. 4. A method of manufacturing the tubular body used for a reinforcing structure of the joint part, comprising arranging a plurality of steel strips in a tubular shape, and adjoining adjacent edges of the steel strips. When manufacturing the tubular body by joining them to each other, the diaphragm is joined to each side surface of the steel strips which are the inner surface of the tubular body, in correspondence with the position where the flange is joined, and the diaphragm. And the inner surface of the tubular body, and the vertical stiffener is joined so as to correspond to the position where the web of the steel beam is joined, and the steel strips are joined at adjacent edges that are adjacent to each other. Then, a tubular body is formed to form a tubular body.