JP4726327B2 - Column-to-beam joint structure and diaphragm - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint structure and a diaphragm of a column and a beam, and more particularly, a steel frame structure having a two-way frame structure using a steel column and a steel beam having an H-shaped cross section, and is provided on the steel column. In particular, the present invention relates to a structure of a joint between a column and a beam provided with a wiring tube insertion hole or a notch for piping a wiring tube or a wiring duct for wiring an electric wire or the like and a diaphragm.
[0002]
[Prior art]
Conventionally, a square steel pipe column has been mainly used for a column having a two-way frame structure.
On the other hand, in any frame structure, lighting, wiring for various equipment and wiring for switches are indispensable, and in many cases, wiring and piping are along the frame structure (columns and beams). It was done.
[0003]
In a general rectangular steel pipe column, as shown in FIG. 8, a wire pipe or a wiring duct 21 (hereinafter collectively referred to as a wiring pipe) is installed along the outer wall surface of the steel pipe column 20. Since the projecting portion by the wiring pipe 21 is formed on the outer wall surface of the steel pipe column 20, there are various problems such as not only being unpreferable in terms of design but also interfering with finishing, facilities, and fixtures.
In order to solve such a problem, as shown by a broken line in FIG. 8, the steel pipe column 20 provided with the wiring duct 21 is covered with the finishing boards 22, and therefore the cross-sectional area of the column is large. As a result, there was a problem that the space utilization was restricted and the finishing cost was high.
[0004]
In addition, when using a steel column with an H-shaped cross section, the area surrounded by the flange and the web is an open space, so it is easy to pass a conduit or the like through this space because it is an effective use of the space. Conceivable.
[0005]
[Problems to be solved by the invention]
However, as shown in FIG. 9, the diaphragm 24 is welded and joined to the actual joining position with the beam in the region surrounded by the flange and the web of the steel pillar 23, as shown in FIG. 9. In the beam portion, the conduit 21 is passed through avoiding the diaphragm 24. For this reason, the bent conduit 21 must be manufactured, which is very troublesome. For this reason, it is common that the conduit 21 is installed along the outer wall surface of the flange of the steel column 23 as in the case of the square steel tube.
[0006]
By the way, when the wiring tube 21 is wired to, for example, a lighting fixture provided on the ceiling, as shown in FIG. 10, the conduit 21 is raised along the steel pillar 23 and wired horizontally behind the ceiling. 27 can also be connected.
In other words, when the ceiling 26 is installed with a margin from the lower end of the beam 25, the conduit 21 is oriented horizontally 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, the ceiling 26 is provided as close to the lower end of the beam 25 as possible, or the ceiling 26 is positioned above the lower end of the beam 25 without considering exposure of the beam shape. In such a case, the diaphragm 24 inevitably interferes with wiring.
[0007]
The present invention has been made in order to solve the above-mentioned problems. A wiring pipe and a wiring duct are attached to a diaphragm welded to a portion surrounded by a flange and a web in a weak axis direction of a steel column having an H-shaped cross section. An object of the present invention is to provide a column-to-beam junction structure and a diaphragm that are easy to construct wiring by providing a wiring tube insertion hole or notch for piping.
[0008]
[Means for Solving the Problems]
The joint structure of a column and a beam according to the present invention is a steel frame structure having a bi-directional frame structure using a steel column and a steel beam having an H-shaped cross section, and the steel frame at the joint between the steel column and the steel beam. A diaphragm welded to a portion surrounded by the flange of the column and the web is provided with a conduit insertion hole for piping a conduit for wiring electric wires, etc., and the conduit insertion hole is provided in the flange of the steel column, web The gusset plate provided for joining the steel beam webs and the region surrounded by the line connecting the leading ends of both flanges are provided at substantially the center .
[0010]
A bolt insertion hole for joining the steel beam provided in the joint by forming the joint of the steel beam by projecting the diaphragm of the joint structure of the column and the beam from the tip of the flange of the steel column. Is provided on the steel beam side from the end of the flange of the steel column.
[0012]
A diaphragm according to the present invention is a diaphragm that is welded and joined to a portion surrounded by a flange and a web of a steel column at a joint between a steel column having an H-shaped cross section and a steel beam, and an electric wire or the like is connected to the diaphragm. A conduit insertion hole for piping a conduit tube for wiring is provided , and the conduit tube insertion hole is provided with a gusset plate provided for joining a flange of a steel column, a web, a steel beam web, and the tips of both flanges. It was provided at almost the center of the area surrounded by the line connecting the parts .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
1 is a perspective view of essential parts of Embodiment 1 of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line II of FIG.
In the figure, 1 is a steel column made of a steel material having an H-shaped 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 having an H-shaped cross section (hereinafter referred to as 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 the direction perpendicular thereto (web direction) is referred to as a weak axis direction. For ease of explanation, the H-shaped beam bonded in the weak axis direction of the H-shaped column 1 is denoted by 2a, and the H-shaped beam bonded in the strong axis direction is denoted by 2b.
[0016]
4a is disposed in a region surrounded by the flange of the H-shaped column 1 and the web at a position corresponding to the upper flange of the H-shaped beam 2a, and an upper diaphragm 4b joined to the flange and the web by welding is similarly H The lower diaphragm corresponds to the lower flange of the beam 2a and is joined by welding at a lower position by the thickness of the lower flange. The upper diaphragm 4a is formed in such a size that the front end thereof is substantially at the same position as the front end of the flange of the H-shaped column 1, and also serves as a bracket serving as a joint of the upper flange of the H-shaped beam 2a. Further, the lower diaphragm 4b protrudes from the distal end portion of the H-shaped column 1 in a substantially trapezoidal shape to form a joint portion 4c, which also serves as a bracket serving as a joint portion of the lower flange of the H-shaped beam 2a.
[0017]
5a is connected to a splice plate 9 to be described later with a high strength bolt 14, and a plurality of bolt insertion holes provided in the upper diaphragm 4a, 5b is connected to a lower flange of the H-shaped beam 2a with a high strength bolt 14. Among the bolt insertion holes 5b, the bolt insertion hole 5b closer to the web of the H-shaped column 1 is formed from the front end of the flange of the H-shaped column 1 by a plurality of bolt insertion holes provided in the joint 4c of the lower diaphragm 4b. It is provided on the shape beam 2a side. 6 is a later-described wiring tube or wiring duct (hereinafter collectively referred to as a wiring tube) 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. It is a wiring tube insertion hole to be inserted.
[0018]
Reference numeral 7 denotes a gusset plate 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 for joining with a splice plate 11 described later are provided in the vertical direction. The gusset plate 7 may be omitted depending on the situation.
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.
11 is 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.
[0019]
Next, the above-described conduit insertion hole 6 will be described.
In the two-way rigid frame column-to-beam joint structure according to the present invention, the H-shaped column 1 is rigidly joined with the H-shaped beam 2b in the strong axis direction and the H-shaped beam 2a in the weak axis direction. Since the stress is transmitted to the H-shaped column 1 mainly through the upper and lower diaphragms 4a and 4b, it is impossible to make holes in the upper and lower diaphragms 4a and 4b.
[0020]
When the flow of stress (stress transmission path) from the H-shaped beams 2a and 2b in the case of the H-shaped column 1 is overviewed in the vicinity of the lower diaphragm 4b, as shown by arrows in FIG. From 2b, 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), the H-shaped beam 2b → the end plate 13 → the flange of the H-shaped column 1 → the web of the H-shaped column 1 As described above, the H-shaped beam 2b → the end plate 13 → the flange of the H-shaped beam 2b → the lower diaphragm 4b → the H-shaped column 1 of the portion that flows without passing through the lower diaphragm 4b and the both sides of the web of the H-shaped beam 2b. It consists of parts that flow to the web.
[0021]
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) flows from the H-shaped beam 2a → the lower diaphragm 4b → the web of the H-shaped column 1. The part and the part which flows into the flange of the H-shaped column 1 on the both sides of the H-shaped beam 2a, the H-shaped beam 2a → the lower diaphragm 4b Note that the flow of these stresses is the same in the upper diaphragm 4a.
[0022]
When a portion where the stress of the lower diaphragm 4b due to the stress flow as described above is large is schematically shown, it can be expressed by a portion A as shown by hatching in FIG. As a result, a triangular region B having a small stress is formed in the vicinity of the center of the portion A. The fact that the stress is small means that the region B does not play the role of a diaphragm, and therefore the conduit insertion hole 6 can be provided in that portion. In other words, the conduit insertion hole 6 may be provided at substantially the center of the region surrounded by the flange, the web, the gusset plate 7 of the H-shaped column 1 and the wire connecting the tips of both flanges.
[0023]
The conduit insertion hole 6 is desirably a circular shape, an oval shape, or a quadrangular shape with rounded corners so that it does not become a starting point of destruction.
Further, the H-shaped beam 2a in the weak axis direction of the H-shaped column 1 is generally bolted, but since the stress flows starting from the bolt position, the bolt position is the both flanges of the H-shaped column 1. If it is located on the web side with respect to the line connecting the tip portions, the region B where the stress in the lower diaphragm 4b is small becomes 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 front ends of both flanges of the H-shaped column 1 as described above, The region B having a small value can be enlarged.
[0024]
Next, an example of manufacturing and construction procedures of 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 joining the end plate 13 having bolt insertion holes provided in the H-shaped beam 2b to the flange that is the strong axis direction of the H-shaped column 1 are provided in advance. Also, 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 of the weak axis of the H-shaped column 1, and the upper diaphragm 4a serving as a bracket is welded to the web and the flange. Similarly, the lower diaphragm 4b corresponding to the lower flange and having the bolt insertion hole 5b and the conduit insertion hole 6 provided at a position below the plate thickness of the lower flange is joined. Next, a gusset plate 7 provided with bolt insertion holes 8 is joined by welding 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, a stiffening diaphragm is welded to the H column 1 in accordance with the position corresponding to the lower flange of the H beam 2b. To do.
Also, bolt insertion holes 3a, 3b, 3c are provided in the upper and lower flanges and web of the H-shaped beam 2a.
[0025]
In this state, the H-shaped column 1, the H-shaped beams 2a and 2b, the splice plates 9, 11 and the like are loaded on a vehicle or the like and transported to the site. At this time, since each of the above members has a packaged shape that can be stacked, the carrying efficiency can be improved.
[0026]
In the field, 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, and a bolt is inserted into the bolt insertion hole and fixed with a nut, and the tension bolt is joined.
[0027]
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 connected to the upper diaphragm 4a. And high-strength bolts in bolt insertion holes 3b and 5b provided in the lower flange of the H-shaped beam 2a and the protruding portion 4c of the lower diaphragm 4b. 14 is inserted and temporarily tightened with a nut.
[0028]
Next, the splice plate 9 is placed on the upper flange of the H-shaped beam 2a and the upper diaphragm 4a, and the high-strength bolts 14 are inserted into the bolt insertion holes 3a and 10, 5a and 10, respectively. Tighten temporarily with a nut. 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, high strength bolts 14 are inserted into the respective bolt insertion holes 12 and 3c, and temporarily fixed with a nut and a nut. Finally, the nuts of all the high strength bolts 14 are finally tightened. Next, the ceiling 16 is installed below or above the lower end of the H-shaped beams 2a and 2b.
[0029]
In this state, as shown in FIG. 6, the conduit 15 that is arranged upright along the H-shaped column 1 in the weak axis direction of the H-shaped column 1 is disposed through the through hole 16 a provided in the ceiling 16. After being inserted into the conduit insertion hole 6 provided in the lower diaphragm 4b, pulled out between the upper and lower diaphragms 4a and 4b and bent almost horizontally, the tip 16 was provided with a ceiling 16 along the H-shaped beam 2b. Wiring is performed from the through hole to a position such as the lighting fixture 17. When wiring is also required on the upper floor, the conduit insertion hole 6 may be provided in 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.
[0030]
As a result, the H-shaped beam 2a is rigidly joined by friction welding in the direction of the weak axis of the H-shaped column 1, and the bending moment can be transmitted from the H-shaped beam 2a to the H-shaped column 1 so that a structure such as a brace can be transmitted. Installation is unnecessary. When the H-shaped beam 2a is joined 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 as described above.
In this way, the H-shaped column 1 and the H-shaped beams 2a and 2b can be joined as a two-way rigid frame structure.
[0031]
Further, since the conduit insertion hole 6 is provided in the lower diaphragm 4b, when the ceiling 16 is provided in the vicinity of the lower ends of the H-shaped beams 2a and 2b, of course, above the lower ends of the H-shaped beams 2a and 2b. Even when the ceiling 16 is provided, wiring of the lighting fixture 17 and the like can be performed very easily.
As mentioned above, although the manufacture and construction procedure of the steel frame structure concerning this Embodiment were demonstrated, this shows the example and can be suitably changed according to situations, such as a factory and the field.
[0032]
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, the gusset plate 7 of the H-shaped column 1, the web of the H-shaped beam 2a and the splice plate 11 are respectively high-strength bolts. 14 shows the case of friction welding, but instead of this, in a small-scale building, these may be joined by joining using a normal bolt shear type or bearing type.
Further, the upper diaphragm 4a is formed in such a size that the front end portion thereof is located at the same position as the front end portion of the flange of the H-shaped column 1, and the lower diaphragm 4b is projected from the front end portion of the flange of the H-shaped column 1 in a substantially trapezoidal shape. However, the upper diaphragm 4a may be configured in the same shape as the lower diaphragm 4b.
[0033]
In the present embodiment configured as described above, since the H-shaped beam 2a is once placed on the protruding portion 4c of the lower diaphragm 4b, a temporary receiving state is realized without tightening the high-strength bolt 14. In some cases, the crane can be removed at this stage. Next, temporary fastening of the H-shaped steel beam 2a is advanced to the lower diaphragm 4b using high-strength bolts 14. In this case as well, the lower flange side of the H-shaped beam 2a does not use a splice plate, and the diaphragm has a diaphragm. Since it is directly bolted to 4b, the number of high-strength bolts 14 is also halved. For this reason, construction cost is reduced and construction time can be shortened.
[0034]
In addition, because the steel material with the H-shaped cross section is used for the columns and beams, the area surrounded by the flange and the web is an open space where the part can be accessed, so the upper and lower diaphragms 4a and 4b and the gusset plate 7 are welded. The assembling work is simple, and the H-shaped beam 2a can be easily joined to the upper and lower diaphragms 4a and 4b. Furthermore, since no braces are required, an open space free of obstacles can be constructed.
[0035]
Further, since the conduit insertion hole 6 is provided in the lower diaphragm 4b, when the ceiling 16 is provided close to the lower end of the H-shaped beam 2a, the ceiling 16 is provided above the lower end of the H-shaped beam 11. Even in this case, wiring of the lighting fixture 17 and the like can be performed very easily.
[0036]
[Embodiment 2]
In general, an H-shaped column used in a two-way rigid frame structure has a cross-sectional shape of a wide size series having the same cross-sectional aspect ratio. For example, the column width of an H-shaped column used in a small and medium-sized building is 250 to It is about 400 mm.
On the other hand, the H-shaped beam has a narrow cross-sectional shape called a medium width or a narrow width (flange width) and has a large beam length. For example, a beam of an H-shaped beam used in a small and medium-sized building. 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 larger.
[0037]
Since the diaphragm provided at the joint between the column and the beam transmits the stress of the H-shaped beam to the H-shaped column, if the plate thickness of the diaphragm is the same as the plate thickness of the flange of the H-shaped beam (usually both Can be connected to the H-shaped column side with the same width. In this case, 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 of the H-shaped column 1 and the web, but partly. It is clear that there is no hindrance to stress transmission even if the shape is notched. However, in this case, unlike the first embodiment, it is not possible to provide a hole (conduit insertion hole 6) other than the bolt insertion hole 5b.
[0038]
In the present embodiment, the lower diaphragm 4b is configured to have a narrower width corresponding to the flange width of the H-shaped beam 2a to be joined on the web side than the front end of the flange of the H-shaped column 1, and the H-shaped beam 2a side. The joint 4c of the H-shaped beam 2a is formed. And while providing the bolt insertion hole 5b in the H-shaped beam 2a side from the front-end | tip part of the flange of the H-shaped column 1 of this junction part 4c, between the side edge part and flange of the junction part 4b, the space area | region 19 (henceforth, A diaphragm notch). The size of the notch 19 is usually about 50 mm × 50 mm to 100 mm × 100 mm, although it depends on the relationship with the flange width of the H-shaped beam 2b in the strong axis direction.
[0039]
Then, the conduit 15 raised along the H-shaped column 1 is inserted into the notch 19 and pulled out between the upper and lower diaphragms 4a and 4b, and the subsequent wiring work is performed. This is the same as in the case of Form 1. The corners of the notch 19 are preferably formed in an arc shape to avoid stress concentration, or the angle portion is dropped in a triangular shape.
Also in the present embodiment, substantially the same effect as in the first embodiment can be obtained.
[0040]
【The invention's effect】
The invention of claim 1 is a steel frame structure having a bi-directional frame structure using a steel column and a steel beam having an H-shaped cross section, and is formed on a flange and a web of the steel column at a joint portion of the steel column and the steel beam. The diaphragm welded to the enclosed part is provided with a conduit insertion hole for piping the conduit for wiring the wires, etc., so that the wiring and piping can be made of steel without compromising the function of the two-way frame structure. It can be processed inside the outer shape of the pillar. For this reason, effective use of space and cost reduction can be realized.
[0041]
According to a second aspect of the present invention, the conduit insertion hole of the first aspect is surrounded by a wire connecting a flange of a steel column, a web, a gusset plate provided for joining a steel beam web, and the tips of both flanges. Since the stress flow at the central portion of the region is small, the stress transmission from the steel beam to the steel column is not impaired.
[0042]
According to a third aspect of the present invention, the diaphragm of the first or second aspect is projected from the tip of the flange of the steel column to form a steel beam joint, and the steel beam provided at the joint is joined. Since the bolt insertion hole is provided on the steel beam side from the tip of the flange of the steel column, a region where the flow of stress of the diaphragm is small can be formed large.
[0043]
The invention of claim 4 is a steel frame structure having a bi-directional frame structure using a steel column and a steel beam having an H-shaped cross section, and is formed on a flange and a web of the steel column at a joint portion of the steel column and the steel beam. A diaphragm welded to the enclosed part is provided with a notch for piping a conduit for wiring electric wires between the steel column flange and the conduit is inserted into the notch. Therefore, substantially the same effect as in the case of claim 1 can be obtained.
[0044]
According to a fifth aspect of the present invention, there is provided a diaphragm welded to a portion surrounded by a flange and a web of the steel column at a joint between the steel column having an H-shaped cross section and the steel beam, and the steel frame of the diaphragm Since there is a conduit insertion hole for piping the conduit for connecting wires, etc., in the area where the stress transmitted from the beam to the steel column is small, the wiring and piping can be connected to the steel column without impairing the diaphragm function. Can be processed inside the outer shape.
[0045]
In the invention of claim 6, the conduit insertion hole is substantially in a region surrounded by a line connecting the flange portion of the steel column, the web, the gusset plate provided for joining the steel beam web, and the end portions of both flanges. Since the central portion is provided in an area where the stress flow is small, transmission of stress from the steel beam to the steel column is not impaired.
[0046]
The invention of claim 7 is a diaphragm that is welded and joined to a portion surrounded by a flange and a web of the steel column at a joint between the steel column and the steel beam having an H-shaped cross section. Since a notch for piping a conduit for wiring an electric wire or the like is provided between the flange of the steel column and the conduit is inserted into the notch, the same as in the case of claim 5 is provided. An effect 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. 1;
3 is a cross-sectional view taken along the line II of FIG.
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 the magnitude of stress flowing in a diaphragm.
FIG. 6 is an operation explanatory diagram of the first embodiment.
FIG. 7 is a plan sectional view of a main part of a second embodiment of the present invention.
FIG. 8 is an explanatory view showing an attachment state of a conduit tube to a steel column made of a conventional square steel tube.
FIG. 9 is an explanatory view showing a state in which a conduit tube is attached to a steel tube column having a conventional H-shaped cross section.
10 is an explanatory diagram of another example of FIG. 9. FIG.
[Explanation of symbols]
1 H column (steel column)
2a H-shaped beam in the weak axis direction (steel beam)
2b H-shaped beam (steel beam) in the strong axis direction
4a Upper diaphragm 4b Lower diaphragm 4c Joint part 5a, 5b Bolt insertion hole 6 Wiring pipe insertion hole 7 Gusset plate 15 Wiring pipe 16 Ceiling 17 Lighting fixture 19 Notch part A Part where stress is large flowing through the lower diaphragm B Stress flowing through the lower diaphragm Small area

Claims (3)

A steel frame structure with a bi-directional frame structure using steel columns and steel beams with an H-shaped cross section,
In 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, etc. The conduit insertion hole is provided at the approximate center of the area surrounded by the flange connecting the steel column flange, the web, the gusset plate provided to join the steel beam web, and the line connecting the tips of both flanges. Characteristic column-beam joint structure. A diaphragm is protruded from the tip of the flange of the steel column to form a steel beam joint, and a bolt insertion hole for joining the steel beam provided in the joint is formed from the tip of the steel column flange. The pillar-to-beam joint structure according to claim 1 , wherein the pillar-to-beam joint structure is provided on a steel beam side. A diaphragm that is welded and joined to a portion surrounded by a flange and a web of the steel column at a joint between the steel column and the steel beam having an H-shaped cross section,
A conduit insertion hole for connecting a conduit for wiring an electric wire or the like to the diaphragm is provided , and the conduit insertion hole is provided for joining a flange of a steel column, a web, and a steel beam web. And the diaphragm characterized by providing in the approximate center part of the area | region enclosed by the line which connects the front-end | tip part of both flanges .

Images