JP2002348955A - Column/beam joint part structure and diaphragm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a column/beam joint part structure and a diaphragm facilitating the wiring work, etc., by providing a wire conduit through-hole or a notch for laying a wire conduit or a wire duct in the diaphragm joined by welding in a part surrounded with a flange and a web in a weak axis direction of an H-steel column. SOLUTION: This steel frame structure of two-directional rigid-frame structure uses the H-steel column 1 and steel beams 2a and 2b. The wire pipe through-hole 6 for laying the electric wire pipe for laying an electric wire, etc., is provided in the diaphragm 4b joined by welding in a part surrounded with the flange and the web of the steel column 1 in the joint part between the steel column 1 and the steel beams 2a and 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a column and a beam and a diaphragm, and more particularly, to a steel frame structure having a two-way rigid frame structure using an H-shaped steel column and a steel beam. Also, the present invention relates to a joint structure between a column and a beam provided with a wiring pipe insertion hole or a notch for piping a wiring pipe or a wiring duct for wiring wires or the like on a diaphragm provided on a steel pillar, and a diaphragm. Things.

[0002]

2. Description of the Related Art Conventionally, square steel pipe columns have been mainly used for columns having a two-way rigid frame structure. On the other hand, no matter what the frame structure, wiring for lighting and various equipment and wiring for switches are indispensable, and in many cases, wiring and piping along the frame structure (posts and beams) are essential. It was done.

[0003] In a general rectangular steel pipe column, as shown in FIG. 8, a conduit or a wiring duct 21 (hereinafter collectively referred to as a wiring pipe) is installed along the outer wall surface of a steel pipe column 20. However, the wiring pipe 2
Since the overhanging portion 1 is formed, there are various problems such as not only being unfavorable in terms of design but also hindering the arrangement of finishing, equipment and furniture. In order to solve such a problem, a steel pipe column 20 provided with a wiring duct 21 is covered with a finishing board 22 as shown by a broken line in FIG. 8, but the cross-sectional area of the column is large. As a result, there is a problem that the space utilization is restricted and the finishing cost is high.

When an H-shaped steel column is used, the area surrounded by the flange and the web is an open space. Passing a conduit or the like through this space is an effective use of space. Easily thought of.

[0005]

However, as shown in FIG. 9, an actual H-shaped steel column has a diaphragm at a joint position between the beam and the beam in a region surrounded by the flange and the web of the steel column 23, as shown in FIG. Since 24 is welded, the conduit 21 passes through the beam portion avoiding the diaphragm 24, and therefore, the bent conduit 21 must be manufactured, which is extremely troublesome. From such a thing,
After all, similarly to the case of the square steel pipe, the conduit 21 is generally installed along the outer wall surface of the flange of the steel column 23.

When wiring the wiring pipe 21 to, for example, a lighting fixture provided on the ceiling, as shown in FIG. 10, the wiring pipe 21 is started up along the steel column 23, and is wired horizontally behind the ceiling. , Lighting equipment 27 can also be connected. In other words, when the ceiling 26 is provided with a sufficient space from the lower end of the beam 25, the conduit 21 is horizontally oriented between the beam 25 and the ceiling 26 without being interfered by the diaphragm 24. Can be changed.
However, in order to use the indoor space most effectively,
6 is provided as close to the lower end of the beam 25 as possible,
In some cases, the ceiling 26 is installed above the lower end of the beam 25 without considering the beam-shaped exposure. In such a case, the wiring is difficult because the diaphragm 24 is inevitably obstructed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and includes a wiring pipe and a diaphragm welded to a portion of a steel column having an H-shaped cross section surrounded by a flange and a web in a weak axis direction and a web. An object of the present invention is to provide a joint structure between a column and a beam and a diaphragm, in which wiring and the like can be easily performed, by providing a wiring pipe insertion hole or a notch for piping a wiring duct.

[0008]

(1) The joint structure between a column and a beam according to the present invention is a steel frame structure having a two-way rigid frame structure using a steel column having an H-shaped cross section and a steel beam, At the joint between the steel column and the steel beam, a diaphragm welded to a portion surrounded by a flange and a web of the steel column is provided with a conduit insertion hole for piping a conduit for wiring electric wires and the like. It is.

(2) The conduit insertion hole having the joint structure between the column and the beam described in (1) above is connected to the flange and the web of the steel column, the gusset plate provided for connecting the web of the steel beam, and both flanges. It was provided almost at the center of the area surrounded by the line connecting the tips.

(3) The joint of the steel beam is formed by projecting the diaphragm having the column and beam joint structure of the above (1) or (2) from the tip of the flange of the steel column, and provided at the joint. A bolt insertion hole for joining the steel beam thus provided is provided on the steel beam side from the tip of the flange of the steel column.

(4) The joint structure between a column and a beam according to the present invention is a steel frame structure having a two-way rigid frame structure using a steel column having an H-shaped cross section and a steel beam, wherein the steel column is A notch for piping a conduit for wiring an electric wire or the like between the flange of the steel column and the diaphragm welded to a portion surrounded by the flange of the steel column and the web at the joint of the steel beam. Is provided.

(5) A diaphragm according to the present invention is a diaphragm which is welded and joined to a portion of a steel column having an H-shaped cross section and a steel beam, which is surrounded by a flange and a web of the steel column. In the diaphragm, a conduit insertion hole for laying a conduit for laying an electric wire or the like is provided in a region where the stress transmitted from the steel beam to the steel column is small.

(6) The conduit insertion hole of the diaphragm of (5) above is formed by a line connecting the flange and the web of the steel column, the gusset plate provided for joining the web of the steel beam, and the tip of both flanges. It was provided almost at the center of the enclosed area.

(7) A diaphragm according to the present invention is a diaphragm which is welded to a portion of a steel column having an H-shaped cross section and a steel beam, which is welded to a portion of the steel column surrounded by a flange and a web. In addition, a notch is provided in the diaphragm between the flange of the steel column and a conduit for wiring an electric wire or the like.

[0015]

[First Embodiment] FIG. 1 is a perspective view of a main part of a first embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. FIG. 2 is a sectional view taken along the line II.
In the drawing, 1 is a steel column made of a steel material having an H-shaped cross section partially shown by a broken line (hereinafter, referred to as an H-shaped column), and 2 is a steel beam made of a steel material also having an H-shaped cross section (hereinafter, an H-shaped beam) It is. In the following description, the flange direction of the H-shaped column 1 is referred to as a strong axis direction, and a direction perpendicular to the flange direction (web direction) is referred to as a weak axis direction. Also, in order to facilitate the explanation, an H-shaped column 1
The H-shaped beam joined in the weak axis direction is denoted by 2a, and the H-shaped beam joined in the strong axis direction is denoted by 2b.

An upper diaphragm 4b is provided at a position corresponding to the upper flange of the H-shaped beam 2a, in a region surrounded by the flange and the web of the H-shaped column 1, and joined to the flange and the web by welding. Is a lower diaphragm corresponding to the lower flange of the H-shaped beam 2a and joined by welding to a position below the lower flange by the thickness of the lower flange. The upper diaphragm 4a is formed to have a size such that the distal end thereof is located at substantially the same position as the distal end of the flange of the H-shaped column 1, and also serves as a bracket that serves as a joint of the upper flange of the H-shaped beam 2a. The lower diaphragm 4b projects substantially trapezoidally from the tip of the H-shaped column 1 to form a joint 4c, which also serves as a bracket serving as a joint for the lower flange of the H-shaped beam 2a.

A plurality of bolt insertion holes 5a provided in the upper diaphragm 4a are connected to a lower flange of the H-shaped beam 2a by the high-strength bolts 14 for joining the splice plate 9 to a splice plate 9 described later with the high-strength bolts 14. Therefore, among the plurality of bolt insertion holes provided in the joint portion 4c of the lower diaphragm 4b, among the bolt insertion holes 5b, the bolt insertion hole 5b close to the web of the H-shaped column 1 is the tip of the flange of the H-shaped column 1. It is provided on the H-shaped beam 2a side from the portion. Reference numeral 6 denotes a later-described wiring pipe or wiring duct (hereinafter, collectively referred to as a wiring pipe) provided between the web side bolt insertion hole 5b of the H-shaped column 1 of the lower diaphragm 4b and the web side end. This is a wiring tube insertion hole to be inserted.

A gusset plate 7 is disposed between the web of the H-shaped column 1 and the upper and lower diaphragms 4a and 4b and joined by welding. A plurality of bolt insertion holes 8 are formed in the vertical direction so as to be connected to a splice plate 11 described later.
The gusset plate 7 may be omitted depending on circumstances. Reference numeral 9 denotes a splice plate for joining the upper diaphragm 4a and the upper flange of the H-shaped beam 2a to a bolt insertion hole 5a provided in the upper diaphragm 4a and a bolt insertion hole 3a provided in the flange of the H-shaped beam 2a. Correspondingly, a plurality of bolt insertion holes 10 are provided. Reference numeral 11 denotes a splice plate for joining the web of the H-shaped beam 2a and the gusset plate 7, and corresponds to the bolt insertion hole 3c provided in the web of the H-shaped beam 2a and the bolt insertion hole 8 provided in the gusset plate 7. A plurality of bolt insertion holes 12 are provided. Reference numeral 2b denotes an H-shaped beam joined to the flange (strong axis direction) of the H-shaped column 1 via an end plate 13 by bolts, welding, or the like.

Next, the above described conduit tube insertion hole 6 will be described. In the joint structure between a column and a beam having a two-way rigid frame structure according to the present invention, the H-shaped column 1 has an H-shaped beam 2 in its strong axis direction.
b, and the H-shaped beam 2a is rigidly joined in the weak axis direction, and the stress is mainly caused by the upper and lower diaphragms 4a, 4b.
And transmitted to the H-shaped column 1, the upper and lower diaphragms 4 a and 4 b cannot be unnecessarily drilled.

In the case of the H-shaped column 1, the flow of stress (stress transmission path) from the H-shaped beams 2a and 2b is transferred to the lower diaphragm 4b.
An overview of the vicinity of is as shown by the arrow in FIG.
From the H-shaped beam 2b in the strong axis direction, at the web position of the H-shaped beam 2b (near the center in the width direction of the flange of the H-shaped beam 2b),
Lower diaphragm 4 such as H beam 2b → end plate 13 → flange of H column 1 → web of H column 1
b, and on both sides of the web of the H-shaped beam 2b, from the H-shaped beam 2b → the end plate 13 → the flange of the H-shaped beam 2b → the lower diaphragm 4b → the portion flowing to the web of the H-shaped column 1 Has become.

Further, from the H-shaped beam 2a in the weak axis direction, the web of the H-shaped beam 2a (near the center of the flange of the H-shaped beam 2a)
Then, from the portion flowing to the web of the H-shaped beam 2a → the lower diaphragm 4b → the H-shaped column 1 and the portion flowing to the flange of the H-shaped beam 2a → the lower diaphragm 4b → the H-shaped column 1 on both sides of the H-shaped beam 2a. Has become. The flow of these stresses is the same in the upper diaphragm 4a.

FIG. 5 schematically shows a portion where the stress of the lower diaphragm 4b is large due to the flow of stress as described above.
Can be represented by a portion A as shown by oblique lines. As a result, a triangular region B having a small stress is formed near the center of the portion A. Since the small stress does not play the role of the diaphragm in the region B, the conduit insertion hole 6 can be provided in that portion. In other words, the conduit insertion hole 6 may be provided substantially at the center of the region surrounded by the flange, the web, the gusset plate 7 of the H-shaped column 1 and the line connecting the tips of both flanges.

The conduit insertion hole 6 is desirably a circle, an oval, or a square with rounded corners, etc. so that it does not become a starting point of destruction according to common sense. Further, the H-shaped beam 2a in the weak axis direction of the H-shaped column 1 is generally bolted, but the stress flows from the bolt position as a starting point. In the lower diaphragm 4b, the region B where the stress is small is very small, and the wiring tube insertion hole 6 cannot be provided. In the present invention, since the bolt insertion hole 5b near the web of the H-shaped beam 1 provided in the lower diaphragm 4b is provided on the H-shaped beam 2a side from the tip of both flanges of the H-shaped column 1 as described above, Can be increased in the region B in which is smaller.

Next, an example of a procedure for manufacturing and constructing the steel frame structure according to the present embodiment configured as described above will be described. In a factory or the like, a plurality of bolt insertion holes for connecting the end plate 13 having the bolt insertion holes provided in the H-beam 2b with bolts are provided in advance in a flange, which is the strong axis direction of the H-shaped column 1, in a factory or the like. Further, a bolt insertion hole 5a is provided at a position corresponding to the upper flange of the H-shaped beam 2a in the vertical direction in the weak axis direction of the H-shaped column 1, and the upper diaphragm 4a also serving as a bracket is welded to the web and the flange. Similarly, the lower diaphragm 4b corresponding to the lower flange and provided with the bolt insertion hole 5b and the conduit insertion hole 6 at a position below the lower flange by the thickness of the lower flange is joined. Next, a gusset plate 7 provided with a bolt insertion hole 8 is welded between the upper and lower diaphragms 4a and 4b. If the beam of the H-beam 2b is higher than the beam of the H-beam 2a,
In accordance with the position corresponding to the lower flange of the shaped beam 2b,
A stiffening diaphragm is welded to the column 1. Also,
Bolt insertion holes 3 in upper and lower flanges and web of H-beam 2a
a, 3b and 3c are provided.

In this state, the H-shaped column 1 and the H-shaped beams 2a, 2
b, The splice plates 9, 11 and the like are loaded into a vehicle or the like and transported to the site. At this time, since each of the above members has a stackable package, the transportation efficiency can be improved.

At the site, first, the H-shaped column 1 is installed at a predetermined position. Next, the end plate 13 of the H-shaped beam 2b is brought into contact with the flange of the H-shaped column 1 in the strong axis direction, a bolt is inserted into the bolt insertion hole, fixed with a nut, and tension bolted.

Next, the lower flange of the H-shaped beam 2a is placed on the joint 4c of the lower diaphragm 4b provided in the weak axis direction of the H-shaped column 1, and the upper flange, the lower flange, and the end of the web are placed. Bolt insertion holes 3b, 5b provided in the lower flange 4a and the projection 4c of the lower diaphragm 4b, and temporarily fixed by abutting or proximate to the ends of the upper diaphragm 4a and the gusset plate 7.
, And temporarily tighten with a nut.

Next, the splice plate 9 is placed on the upper flange and the upper diaphragm 4a of the H-shaped beam 2a, and the high-strength bolts 14 are inserted into the bolt insertion holes 3a and 10, 5a and 10, respectively. Temporarily fasten with temporary fastening and nuts. Further, the splice plate 11 is brought into contact with the web of the H-shaped beam 2a and the side surface of the gusset plate 7, and the high-strength bolt 14 is inserted into each of the bolt insertion holes 12 and 3c, and is temporarily fixed with the temporary fixing and the nut. Finally, the nuts of all the high-strength bolts 14 are fully tightened. Next, H beam 2
The ceiling 16 is installed below the lower ends a and 2b or above the lower end.

In this state, as shown in FIG.
Through the through hole 16a provided in the ceiling 16 and the conduit tube insertion hole 6 provided in the lower diaphragm 4b through the through hole 16a provided in the ceiling 16 in the weak axis direction. After being drawn out between the upper and lower diaphragms 4a and 4b and bent substantially horizontally, the front end thereof is placed on the ceiling 1 along the H-shaped beam 2b.
The wiring is provided from the through hole provided with 6 to a position such as the lighting fixture 17. If wiring is also required on the upper floor, the conduit insertion hole 6 may be provided on the upper diaphragm 4a as in the case of the lower diaphragm 4b. Finally, the periphery of the H-shaped column 1 exposed in the room is covered with a board 18 or the like.

As a result, the H-shaped beam 2a is rigidly joined by friction welding in the weak axis direction of the H-shaped column 1, so that the bending moment can be transmitted from the H-shaped beam 2a to the H-shaped column 1, and a brace or the like can be transmitted. Eliminates the need for installation of structures. When joining the H-shaped beam 2a to both sides of the H-shaped column 1 in the weak axis direction, the H-shaped beam 2a is rigidly joined to the other side in the same manner as described above. Thus, the H-shaped column 1 and the H-shaped beams 2a and 2b can be joined as a two-way rigid frame structure.

Also, since the conduit insertion hole 6 is provided in the lower diaphragm 4b, not only when the ceiling 16 is provided near the lower ends of the H-shaped beams 2a and 2b, but also the lower ends of the H-shaped beams 2a and 2b. Even when the ceiling 16 is provided above, wiring of the lighting fixture 17 and the like can be performed very easily.
The procedure for manufacturing and constructing the steel frame structure according to the present embodiment has been described above, but this is merely an example, and can be changed as appropriate according to the situation of a factory or a site.

In the above description, the diaphragms 4a and 4b of the H-shaped column 1, the H-shaped beam 2a and the splice plate 9, and the gusset plate 7 of the H-shaped column 1 and the web and the splice plate 11 of the H-shaped beam 2a are respectively used. High strength bolt 1
4 shows the case of friction joining, but instead of this,
In a small-scale building, these may be joined by joining using a shearing type or bearing type using ordinary bolts. Further, the upper diaphragm 4a is formed in such a size that the front end thereof is located at the same position as the front end of the flange of the H-shaped column 1, and the lower diaphragm 4b is projected substantially trapezoidally from the front end of the flange of the H-shaped column 1. Although the case where the joined portion 4c is formed is shown, the upper diaphragm 4a may be formed in the same shape as the lower diaphragm 4b.

In the present embodiment configured as described above, the H-shaped beam 2a is temporarily mounted on the projection 4c of the lower diaphragm 4b, so that the temporary support can be provided without tightening the high-strength bolt 14. The condition can be realized, and in some cases, the crane or the like can be removed at this stage. Next, the H-shaped steel beam 2a is attached to the lower diaphragm 4b using the high-strength bolt 14.
In this case, too, the lower flange side of the H-shaped beam 2a is directly bolt-joined to the diaphragm 4b without using a splice plate. Becomes 1. Therefore, the construction cost is reduced, and the construction time can be shortened.

Further, since the steel material having the H-shaped cross section is used for the column and the beam, the area surrounded by the flange and the web is an open space and the part can be accessed.
a, 4b and the gusset plate 7 can be easily welded, assembled, etc., and the upper and lower diaphragms 4a, 4b
The joining of the shaped beams 2a is also easy. Furthermore, since no braces are required, an open space without obstacles can be constructed.

Further, since the conduit insertion hole 6 is provided in the lower diaphragm 4b, the ceiling 16 is provided near the lower end of the H-shaped beam 2a, and the ceiling 16 is provided above the lower end of the H-shaped beam 11 as well. Even in the case where 16 is provided, wiring of the lighting fixture 17 and the like can be performed very easily.

[Embodiment 2] In general, an H-shaped column used in a two-way rigid frame structure has a cross-sectional shape of a wide-width series having the same cross-sectional aspect ratio. Column width of the shape column is 250-400mm
It is about. On the other hand, H-beams have a narrow cross-sectional shape called a medium width or a narrow width (flange width) and have a large beam width. For example, H-beams used in small and medium-sized buildings are used. The width is about 150 to 250 mm. For this reason, the width of the H-shaped beam is narrower than the width of the H-shaped column (the same width in the strong axis direction and the weak axis direction), and the difference between the widths is at least 100 mm, and 200 mm when the width is large.

The diaphragm provided at the joint between the column and the beam is:
Since the stress of the H-shaped beam is transmitted to the H-shaped column, if the thickness of the diaphragm is the same as the thickness of the flange of the H-shaped beam (usually, both are the same thickness or the same thickness of the diaphragm). Are larger), and they can be connected to the H-shaped column side with the same width. In this way, as shown in FIG. 7, the diaphragm (the lower diaphragm 4b is shown in the figure) does not cover the entire area surrounded by the flange and the web of the H-shaped column 1, but a part thereof. It is clear that the transmission of the stress does not hinder even if the shape is notched. However, in this case, unlike Embodiment 1, holes other than the bolt insertion hole 5b (conduit insertion hole 6) cannot be provided.

In the present embodiment, the lower diaphragm 4b is formed to have a width corresponding to the flange width of the H-shaped beam 2a to be joined on the web side from the tip of the flange of the H-shaped column 1 so as to be H-shaped. It extends to the side of the beam 2a to form a joint 4c of the H-shaped beam 2a. And this joint 4
c, a bolt insertion hole 5b is provided on the H-shaped beam 2a side from the tip of the flange of the H-shaped column 1 and a space region 19 (hereinafter referred to as a notch of the diaphragm) is provided between the side edge of the joint 4b and the flange. ). Although the size of the notch 19 depends on the relationship with the width of the flange of the H-shaped beam 2b in the strong axis direction, it is usually 50 mm × 50 mm to 100 mm × 100.
mm.

The conduit tube 15 standing up along the H-shaped column 1 is inserted into the notch portion 19, and is drawn out between the upper and lower diaphragms 4a and 4b.
Subsequent wiring operations are the same as in the first embodiment. It is desirable that the corner of the notch 19 be formed in an arc shape or a triangular shape in order to avoid concentration of stress. In the present embodiment, substantially the same effects as in the first embodiment can be obtained.

[0040]

According to the first aspect of the present invention, there is provided a steel frame structure having a two-way rigid frame structure using a steel column having an H-shaped cross section and a steel beam, wherein the steel column is provided at a joint between the steel column and the steel beam. Since the diaphragm welded to the part surrounded by the flange and the web is provided with a conduit insertion hole for piping a conduit for wiring electric wires, etc., without impairing the function as a two-way rigid frame structure, Wiring and piping can be processed inside the outer shape of the steel column. For this reason, effective use of space and cost reduction can be realized.

According to a second aspect of the present invention, the conduit insertion hole of the first aspect is connected to a flange of a steel column, a web, a gusset plate provided for joining a web of a steel beam, and a line connecting the end portions of both flanges. The stress transmission from the steel beam to the steel column is not impaired since the stress flow is provided in a substantially central area of the area surrounded by the circles.

According to a third aspect of the present invention, the diaphragm according to the first or second aspect is protruded from a distal end portion of a flange of a steel column to form a joint portion of a steel beam, and the steel beam provided at the joint portion is joined. Since the bolt insertion hole is provided on the steel beam side from the tip of the flange of the steel column, the region where the flow of stress of the diaphragm is small can be made large.

According to a fourth aspect of the present invention, there is provided a steel frame structure having a two-way rigid frame structure using a steel column having an H-shaped cross section and a steel beam, wherein a flange of the steel column is provided at a joint between the steel column and the steel beam. And a diaphragm welded to a portion surrounded by the web, a notch for piping a conduit for wiring a wire or the like between the flange of the steel column,
Since the conduit is inserted into the cutout, substantially the same effect as in the first aspect can be obtained.

According to a fifth aspect of the present invention, there is provided a diaphragm welded to a portion of a steel column having an H-shaped section and a steel beam, which is welded to a portion of the steel column surrounded by a flange and a web. In the region where the stress transmitted from the steel beam to the steel column is small, a conduit insertion hole for laying a conduit for laying electric wires and the like is provided, so that wiring and piping can be performed without impairing the function of the diaphragm. Can be processed inside the outer shape of the steel column.

According to a sixth aspect of the present invention, the conduit insertion hole is surrounded by a line connecting the flange and the web of the steel column, the gusset plate provided for joining the web of the steel beam, and the tip of both flanges. Since it is provided in the region where the flow of stress is small in the substantially central portion of the region, transmission of stress from the steel beam to the steel column is not impaired.

A seventh aspect of the present invention is a diaphragm welded to a portion of a steel column having a H-shaped cross section and a steel beam, which is welded to a portion of the steel column surrounded by a flange and a web. A notch for piping a conduit for wiring electric wires and the like is provided between the flange of the steel column and the conduit is inserted into the notch. Almost the same effects can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a sectional view taken along the line II of FIG. 2;

FIG. 4 is an explanatory diagram showing a state of transmission of stress at a joint between a column and a beam.

FIG. 5 is an explanatory diagram showing magnitude of stress flowing through a diaphragm.

FIG. 6 is an operation explanatory view of the first embodiment.

FIG. 7 is a plan sectional view of a main part according to a second embodiment of the present invention.

FIG. 8 is an explanatory view showing a state in which a conduit tube is attached to a conventional steel column made of a rectangular steel tube.

FIG. 9 is an explanatory view showing a state in which a conduit is attached to a conventional H-shaped steel pipe column.

FIG. 10 is an explanatory diagram of another example of FIG. 9;

[Explanation of symbols]

 Reference Signs List 1 H-shaped column (steel column) 2a H-shaped beam in weak axis direction (steel beam) 2b H-shaped beam in strong axis direction (steel beam) 4a Upper diaphragm 4b Lower diaphragm 4c Joint 5a, 5b Bolt insertion hole 6 Wiring tube Insertion hole 7 Gusset plate 15 Wiring tube 16 Ceiling 17 Lighting fixture 19 Notch A A part where the stress flowing to the lower diaphragm is large B An area where the stress flowing to the lower diaphragm is small

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hitoshi Ito 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. Inside Steel Corporation

Claims (7)

[Claims] 1. A steel frame structure having a two-way rigid frame structure using a steel column having an H-shaped cross section and a steel beam, wherein a joint between the steel column and the steel beam is surrounded by a flange and a web of the steel column. A joint structure between a column and a beam, wherein a conduit for inserting a conduit for wiring electric wires and the like is provided in a diaphragm welded to the bent portion. 2. A conduit insertion hole is formed at a substantially central portion of a region surrounded by a line connecting a front end portion of a flange, a web, a gusset plate provided to join a web of a steel beam, and a flange of a steel column. 2. The device according to claim 1, wherein
Column and beam joint structure described. 3. A steel beam joint is formed by projecting a diaphragm from a front end of a flange of a steel column, and a bolt insertion hole provided at the joint portion for joining the steel beam is formed in the steel column. The joint structure between a column and a beam according to claim 1 or 2, wherein the column and the beam are provided on the steel beam side from the tip of the flange. 4. A steel frame structure having a bidirectional rigid frame structure using a steel column and a steel beam having an H-shaped cross section, wherein a joint between the steel column and the steel beam is surrounded by a flange and a web of the steel column. A joint structure between a column and a beam, wherein a notch portion for piping a conduit for wiring an electric wire or the like is provided between a diaphragm welded to the bent portion and a flange of the steel column. 5. A diaphragm welded to a portion of a steel column having an H-shaped cross section and a steel beam, which is welded to a portion of the steel column surrounded by a flange and a web, wherein the diaphragm is formed of a steel beam. A diaphragm, wherein a conduit insertion hole for providing a conduit for laying an electric wire or the like is provided in an area where stress transmitted to a steel column is small. 6. A substantially central portion of a region surrounded by a line for connecting a conduit insertion hole with a flange and a web of a steel column, a gusset plate provided for joining a web of a steel beam, and a front end of both flanges. 6. The device according to claim 5, wherein
The described diaphragm. 7. A diaphragm welded to a portion of a steel column having an H-shaped cross section and a steel beam, which is welded to a portion of the steel column surrounded by a flange and a web, wherein the diaphragm is attached to the steel column. A notch for piping a conduit for wiring an electric wire or the like between said flange and said flange.