JPH09217421A - Joint construction between square steel pipe column and h-shaped steel beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint construction capable of decreasing advantageously the generation of reaction force of a lever when beam-column joint sections are bolted, decreasing the amount of deformation in joint sections, having no complicated construction and easily manufacturing it at a low cost. SOLUTION: In joint sections at right angle to a square steel pipe column 1 and H-shaped steel beams 2 and 12 in a side state, plate-like joint metal fixtures 3 are fixed along up and down flanges of the ends of one H-shaped steel beam 2 with separate bolts 6, and plate-like joint metal fixtures 14 and fixed along up and down flanges of the ends of the other H-shaped steel beam 12 with separate bolts 6. The joint metal fixtures 3 and 14 are fixed to the square steel pipe column 1 with common through-bolts 7 inserted by crossing holes passing through lengthwise of the joint metal fixtures 3 and 14 and the section of the square steel pipe column 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for forming a joint for joining a rectangular steel pipe column and an H-shaped steel beam.

[0002]

2. Description of the Related Art Conventionally, as a joining structure between a square steel tubular column and an H-shaped steel beam, a structure using a diaphragm is generally known. Since this diaphragm-based joining structure is an assembly structure by welding, quality control of the welded joint is important. It takes a great deal of skill and man-made to finish a sound welding joint. In particular, when cold-formed square steel pipes are used as the square steel pipe columns, welding requires skill. However, since it is difficult to secure a skilled technician for welding these days, quality and cost become a problem when using a diaphragm.

In contrast to such a system using a diaphragm, there is a connecting structure of a square steel tube column and an H-shaped steel beam by bolt connection without using a diaphragm. This joint structure will be described with reference to FIG. In the example of FIG. 7, the H-shaped steel beam 2 is orthogonal to the rectangular steel tubular column 1 in three directions in a plane orthogonal to the T-shape to form a joint between the rectangular steel tubular column 1 and the H-shaped steel beam 2. The rectangular steel tube column 1 uses a material formed by cold forming. Here, the connection between the rectangular steel pipe column 1 and the H-shaped steel beam 2 is performed by the bolts and nuts 20 and the web portion 2 of the split tee 21 which is a joint fitting.
By fixing the flange portion 24 of the split tee 21 to the square steel pipe column 1 with the one-side bolt 23, the H-shaped steel beam 2 to which the 2 is fixed is attached to the square steel pipe column 1. In this way, a joint structure having a joint between the rectangular steel tube column 1 and the H-shaped steel beam 2 is formed.

[0004]

By the way, as shown in FIG. 9, the joining structure of the rectangular steel tube column 1 and the H-shaped steel beam 2 fixed by using the one side bolt 23 has a tensile force in the arrow direction. When it acts, the deformation a occurs in the rectangular steel tube column 1. The reason for causing such deformation is that the flange portion 24 of the split tee 21 is joined by the one-side bolt 23 in the side plate 25 that constitutes the rectangular steel tubular column 1. In order to prevent such deformation, Japanese Patent Application No. 6-20055
In FIG. 9, as shown in FIG. 8, the L-shaped steel reinforcing members 26 are abutted and fixed to the four corners on the outer surface of the rectangular steel tubular column 1 to reinforce the rectangular steel tubular column 1. In addition, there is a method of joining the H-shaped steel beam 28 to which the joining metal fitting 27 is fixed by the one side bolt 29, but it is necessary to attach the L-shaped steel reinforcing member 26, and the deformation is against the strong tensile force. It can be difficult to prevent enough.
Furthermore, as another means, there is a method of increasing the wall thickness of the column. This method also cannot suppress the deformation.

The present inventor has proposed that a rectangular steel tube column and an H-shaped steel beam are
In view of such a situation in which a split tee is used as a joint fitting and is joined with a one-side bolt, the present inventor has developed a technique using a through bolt, and is disclosed in Japanese Patent Application No. 7-32625.
I am applying for No. 4. However, Japanese Patent Application No. 7-3
It is required to develop a joint structure that further reduces the lever reaction force and effectively utilizes the proof strength of the bolt, as compared with the split tee joint fitting disclosed in No. 26254.

Therefore, in order to satisfy the above requirements, the present invention advantageously reduces the generation of a lever reaction force at the time of bolt tightening at a beam-column joint, reduces deformation at the joint, and complicates the structure. Another object of the present invention is to provide a joint structure between a rectangular steel tube column and an H-shaped steel beam that is easy and inexpensive to manufacture.

[0007]

In order to achieve the above-mentioned object, the joining structure of the rectangular steel tube column and the H-shaped steel beam of the present invention is
At the joint between the rectangular steel tube column and the H-shaped steel beam, plate-like joint fittings are separately fixed with bolts along the upper and lower flanges of the end of the H-shaped steel beam, and the length of the joint fitting is fixed. It is configured by fixing the joining metal fitting to the rectangular steel tube column with through bolts that pass through a hole penetrating in the direction and a cross section of the rectangular steel tube column. In the joining structure of the present invention, a plate-like joining fitting is used as the joining fitting.
By using the plate-shaped joining fitting, the thickness of the joining fitting can be appropriately reduced, the lever reaction force can be minimized, the deformation of the joint portion can be further reduced, and the bolt proof strength can be effectively utilized.
At the joint between the rectangular steel tube column and the H-shaped steel beam, the moment acting on the H-shaped steel is input to the column as the axial force of the upper and lower flanges. At this time, in the conventional one-side bolt connection,
This has been a problem because the side plate of the square steel tube column around the one-side bolt is deformed. On the other hand, the present invention uses a plate-shaped joint metal fitting as the joint metal fitting and connects the column and the beam with the plate-shaped joint metal fitting and the through bolt, so that the conventional tensile force acts on the side plate of the square steel pipe pillar. The acting force acts as a compressive force on the side plate facing the side plate of the prismatic steel tubular column and as a distributed load on the end surface of the plate-like joining fitting.
As a result, the compressive force acts on the surface, so that the deformation is suppressed. Here, as the square steel tube column, a cold-formed square steel tube is used, but a square steel tube formed of grooved steel or the like may be used. The H-section steel in the H-section steel beam is used to include the I-section steel.

Further, in the joint structure of the rectangular steel tube column and the H-shaped steel beam of the present invention, at the joint portion where the rectangular steel tube column and the H-shaped steel beam are laterally orthogonal to each other in a cross shape, one H-shaped steel beam On the edge,
The plate-shaped joint fittings are separately fixed along the lower flange with bolts, and the plate-like joint fittings are separately fixed along the lower and upper flanges of the other H-shaped steel beam with bolts,
It is configured by fixing the joining metal fittings to the rectangular steel pipe pillars by a common through bolt inserted through a hole penetrating in the lengthwise direction of each joining metal fitting and a cross section of the rectangular steel pipe pillars. . Here, since the flanges of the respective joint fittings of the two H-shaped steel beams are fixed to the side plates on both sides of the square steel tubular column facing each other by common through bolts, the external force between the H-shaped steel beams is applied. The force transmission becomes smooth, and the local stress state and deformation of the cross section of the rectangular steel pipe column are greatly alleviated and reduced. Further, in the present invention, since the joint fittings of the two H-shaped steel beams are separately fixed to the side plates on both sides of the square steel tubular column by the one-side bolts, the common through bolts are used in the present invention. The work is easy and reliable, and the number of bolts to be managed is reduced accordingly. Here, the force transmission in the joint structure of the rectangular steel tube column and the H-shaped steel beam of the present invention will be described with reference to FIG. 6 in comparison with that in the conventional technique. Figure 6 shows the stress state and stress transfer acting on the structure during an earthquake.
Anti-symmetric bending moments act on the shaped steel beams 2 and 12. When a bending moment acts on the H-section steel, the axial force (tensile force and compressive force) of the upper and lower flanges is a plate-like joining metal fitting 3,
It is transmitted to the pillar via 14. In the structure of FIG. 6A, the plate-like joining metal fittings 3 facing each other with the through bolts 7, 7,
Since 14 are connected, the tensile force M / h (+) on one side plate side of the rectangular steel tube column 1 is input to the column as a compression force M / h (-) on the side plate side facing the side plate. As a result, the surface of the upper plate-like joining metal fitting 3 and the surface of the lower plate-like joining metal fitting 14 resist and the distributed load is applied to the side plate surface (arrow in FIG. 6).
The deformation is suppressed because it becomes a form that works as. On the other hand, in the conventional joint structure of the rectangular steel column and the H-shaped steel beam of FIG.
The H-shaped steel beams 2 and 12 are joined to the side plates 4 a and 4 b of the rectangular steel pipe column 1. Therefore, when the bending moment M acts,
The force is transmitted to the side plate 4b from the side plate 4a via the one side bolt 23 (side plate 4c, side plate 4d facing the side plate 4c). The side plate 4a and the side plate 4b act independently and independently with respect to an external force, and the side plate 4a and the side plate 4 of the square steel pipe column 1 are provided.
There is no special mechanism to prevent the deformation of the cross section with b. That is, in the case of the conventional method, the tensile force M / h (+) causes the local deformation shown in FIG. 9 to occur on the side plate of the square steel pipe column around the one side bolt 23 via the one side bolt 23. Since the plate-shaped joining fitting has a plate-shaped structure, the lever reaction force can be further reduced and the bolt proof strength can be efficiently used when the through bolt is used as compared with the case of using the split tee. As a shear resistance device, the one side bolt 8 is separately provided in FIG. 6 (a) to cope with the problem, but in FIG. 6 (b), the one side bolt 23 also serves as a shear resistance device. In this respect as well, it can be said that the joint structure of the rectangular steel tube column and the H-shaped steel beam of the present invention has high reliability.

Further, in the joint structure of the rectangular steel pipe column and the H-shaped steel beam of the present invention, at the joint portion where the H-shaped steel beam is orthogonal to the T-shape in a plane at the same height of the rectangular steel pipe column, It is possible to provide the joint structure between the rectangular steel pipe column and the H-shaped steel beam described above, and the joint structure between the rectangular steel pipe column and the H-shaped steel beam according to claim 2. The joining structure of the present invention is not excluded from being implemented in combination with another type of joining structure.

Further, in the joint structure of the rectangular steel tube column and the H-shaped steel beam of the present invention, one plate-shaped joining metal fitting is fixed along the outside of the upper and lower flanges of the end of the H-shaped steel beam. It can be done by The single plate-shaped joining metal fitting according to the present invention does not require welding, and thus can be easily manufactured with high accuracy without welding distortion or the like. In addition, in the joint structure of the rectangular steel pipe column and the H-shaped steel beam of the present invention, one plate-shaped joining metal fitting is fixed along both sides inside the upper and lower flanges of the end of the H-shaped steel beam. can do.

In the joint structure of the rectangular steel tube column and the H-shaped steel beam of the present invention, it is preferable to provide a shear resistance device between the rectangular steel tube column and the H-shaped steel beam. Here, the shear force resisting member opposes the shear force acting at the joint between the rectangular steel tube column and the H-shaped steel beam. The through bolt described above can sufficiently oppose the bending moment and axial force acting at the beam end. However, it may not be sufficient for the shear force. for that reason,
In addition to through bolts, a shear resistance device is provided at the joint,
The structure will be even more reliable against the effects of all external forces. As a means for installing the shear resistance device, the shear resistance device has one side of an angle fixed to a square steel pipe column by a one-side bolt, and the other side of the angle and the end of the web of the H-shaped steel beam. It can be done by means of tightening with bolts and nuts.

[0012]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, one side plate 4 of the rectangular steel tube column 1
In a, the form at the time of joining H-shaped steel beam 2 is shown. Plate-like joining metal fittings (made of steel) 3 and 3 are separately fixed to the upper and lower flanges 5 and 5 of the end of the H-shaped steel beam 2 by bolts and nuts 6. The H-shaped steel beam 2 is positioned at the mounting location of the rectangular steel pipe column 1, and the through bolt 7 is cut across the hole penetrating the plate-shaped joining fittings 3, 3 in the length direction and the cross section of the rectangular steel pipe column 1. The H-shaped steel beam 2 is fixed to the rectangular steel tube column 1 by inserting it. In this way, the joint structure of the rectangular steel tube column 1 and the H-shaped steel beam 2 is formed. In this embodiment, the number of through bolts 7 is four for each joint fitting. In this embodiment, an angle is used as the shearing force resistance tool. In FIG. 1, the shear resistance tool is such that one side of an angle 10 is fixed to a side plate 4a of a rectangular steel tube column 1 with a one-side bolt 8, and the other side of the angle 10 is bolted to a web 9 of an H-shaped steel beam 2. -By means of tightening with the nut 11.

In FIG. 2, the side plate 4a of the square steel tube column 1 is shown.
Then, a mode in which the H-shaped steel beams 2 and 12 are respectively joined to the side plate 4b facing the side plate 4a is shown. Here, the prismatic steel tube column and the H-shaped steel beam are laterally orthogonal to each other to form a joint. Plate-shaped joining metal fittings 3 and 3 provided separately by fixing bolts and nuts 6 on the upper and lower flanges 5 and 5 of the end of one H-shaped steel beam 2, and the other H-shaped steel beam 12
The plate-like joining fittings 14, 14 provided separately on the upper and lower flanges 13, 13 respectively fixed to the end portions of the square bolts and nuts 6 with each other are inserted through the rectangular steel pipe column 1 through a common section. It is fixed to the square steel pipe column 1 with a through bolt 7. In this embodiment, an angle is used as the shearing force resistance tool. In FIG. 2, the shear resistance device is a square steel pipe column 1
Secure one side of the angle 10 with the one side bolt 8,
By means of fastening the other side of the angle 10 and the ends of the webs 9 and 15 of the H-shaped steel beams 2 and 12 with bolts and nuts 11.

Next, referring to FIG. 3, there is shown a form of a joint structure of a rectangular steel pipe column and an H-shaped steel beam, which is a combination of the joint structure of claim 1 and the joint structure of claim 2. In FIG. 3, on the side plates 4a, 4b, and 4c of the rectangular steel pipe column 1,
The form at the time of joining H-shaped steel beam 2,12,16 respectively is shown. Here, the rectangular steel tube column and the H-shaped steel beam are planarly T-shaped.
The joint is formed orthogonal to the letter. The H-shaped steel beams 2, 12, and 16 are joined to the rectangular steel tubular column 1 by the H-shaped steel beams 2, 11, and
The plate-like joining metal fittings 3, 14, and 17 are fixed to 16 respectively, and the plate-like joining metal fitting 3 at the mounting position of the H-shaped steel beam,
Tighten 14 and 17 with through bolts 7. Here, the through bolt 7 is inserted across the hole penetrating in the length direction of the plate-like joining metal fittings 3, 14, 17 and the cross section of the rectangular steel pipe column 1. A common through bolt 7 is used for the plate-like joining fittings 3 and 14. For each H-shaped steel beam 2, 12, 16 a one-side bolt 8 is used as a shear resistance tool.

In FIG. 4, unlike the case of FIG. 2, the square steel tube column 1 and the H-shaped steel beams 2, 12, 16, and 18 are joined by the through bolts 7 via the joining fittings 3, 14, 17, and 19. The case where the one side bolt 8 is used as the shearing force resistance tool is shown.

In FIG. 5, the H-shaped steel beam 2 is joined to one side plate 4a of the rectangular steel tubular column 1. However, in FIG. 1, unlike the case where the joining metal fitting is arranged outside the flange of the H-shaped steel beam. , H-shaped steel beams are arranged inside the flange.
In the case of FIG. 5, plate-shaped joining metal fittings 3a and 3b are fixed to both sides inside the flange 5 of the H-shaped steel beam 2.

[0017]

【Example】

(Embodiment 1) Referring to FIG. 1, one side plate 4 of a square steel pipe column 1
An example of joining the H-shaped steel beam 2 to a will be described.
In FIG. 1, a rectangular steel tube column 1 is made of a square cold-formed rectangular steel tube having a side length of 300 mm and a side plate 4a having a thickness of 9 mm. The H-shaped steel beam 2 has a web height of 450 mm and a thickness of 9 m.
m, the width of the flange is 200 mm, and the thickness is 14 mm. Steel plate 3 used as a plate-shaped joining metal fitting has a length of 320 mm
-The width is 240 mm and the thickness is 80 mm. Four holes each having a diameter of 26 mm are drilled at a position 25 mm from the surface of the steel plate. The through bolt 7 that joins the H-shaped steel beam 2 and the square steel tubular column 1 has a diameter of 24 mm. To fix each joint fitting 3 to the H-shaped steel beam 2, use 4 bolts in a row with 22 mm diameter bolts.
Use a total of 8 rows. As a shear resistance tool, a nominal diameter of 24
mm one side bolt 8 was used.

(Embodiment 2) FIG. 2 shows an embodiment in which the H-shaped steel beams 2 and 12 are joined to the side plate 4a of the rectangular steel tube column 1 and the side plate 4b facing the side plate 4a, respectively. FIG.
In, the rectangular steel tube column 1 is made of a square cold-formed rectangular steel tube having a side length of 300 mm and a side plate thickness of 9 mm. H-shaped steel beams 2 and 11 have a web height of 450 mm and a thickness of 9 m.
m, the width of the flange is 200 mm, and the thickness is 14 mm. The steel plates 3 and 14 used as the plate-like joining fittings have a length of 32.
The width is 0 mm, the width is 240 mm, and the thickness is 80 mm. Four holes each having a diameter of 26 mm are drilled at a position 25 mm from the surface of the steel plate. Joining the H-shaped steel beam 2 and the rectangular steel tube column 1,
The through bolt 7 has a diameter of 24 mm. Each joint fitting 3, 1
In order to fix the No. 4 to the H-shaped steel beams 2 and 12, four bolts each having a diameter of 22 mm are used in one row and a total of eight bolts in two rows are used. A one-sided bolt 8 having a nominal diameter of 24 mm was used as the shearing force resistance tool.

(Embodiment 3) Referring to FIG. 3, the H-shaped steel beams 2 and 12 are joined to the side plates 4a and 4b of the square steel tubular column 1, respectively, and the H-shaped steel beam 16 is joined to the side plate 4c. An example will be described. In FIG. 3, the rectangular steel pipe column 1 is made of a square cold-formed rectangular steel pipe having a side length of 300 mm and a side plate thickness of 9 mm. H-shaped steel beams 2, 12, 16 have a web height of 450 mm, a thickness of 9 mm, and a flange width of 200 mm.
-The thickness is 14 mm. The steel plates 3 and 14 used as the plate-shaped joining fittings have a length of 320 mm, a width of 240 mm, and a thickness of 80 mm, and four holes of 26 mm in diameter are opened at a position 25 mm from the surface of the steel plates. Further, the steel plate 17 which is a plate-shaped joining metal fitting orthogonal to the steel plates 3 and 14 which is a plate-shaped joining metal fitting has a length of 320 mm, a width of 240 mm and a thickness of 110 mm, and is located 25 mm from the surface of the steel plate. 4 holes with a diameter of 26 mm are drilled through. The through bolt 7 that joins the H-shaped steel beam 2 and the square steel tubular column 1 has a diameter of 2
It is a round steel of 4 mm. The through bolt is a common through bolt for the left and right plate-shaped joining fittings 3 and 14 facing each other. H-shaped steel beams 2, 12, 1 of each joint fitting 3, 14, 17
For fixing to 6, two bolts with a diameter of 22 mm should be used in a row of 4 bolts.
Use a total of 8 rows. As a shear resistance tool, a nominal diameter of 24
mm one side bolt 8 was used.

(Embodiment 4) Referring to FIG. 4, the H-shaped steel beams 2 and 12 are joined to the side plates 4a and 4b of the rectangular steel tubular column 1, respectively, and the H-shaped steel beams 16 and 1 are connected to the side plates 4c and 4d, respectively.
An example of joining 8 will be described. Show. In FIG. 4, the rectangular steel pipe column 1 has a side length of 300 mm and a side plate thickness of 9 mm.
It consists of a square cold-formed rectangular steel pipe of mm. The H-shaped steel beams 2, 12, 16 and 18 have a web height of 450 mm and a thickness of 9 mm, and a flange width of 200 mm and a thickness of 14 mm. The steel plates 3 and 14 used as the plate-like joining metal fittings have a length of 320 mm, a width of 240 mm, and a thickness of 80 mm, and a hole having a diameter of 26 mm is formed at a position 25 mm from the surface of the steel plate.
Open through the book. In addition, a steel plate 17, which is a plate-shaped joint fitting, orthogonal to the steel plates 3 and 14 which is a plate-shaped joint fitting,
19 is 320 mm long, 240 mm wide, and 110 m thick
m, and at a position 25 mm from the surface of the steel plate, the diameter 26
Drill through 4 mm holes. The through bolt 7 that joins the H-shaped steel beam 2 and the square steel tubular column 1 is round steel having a diameter of 24 mm. The through bolt is a common through bolt for the left and right plate-shaped joining fittings 3 and 14 facing each other. The same applies to the steel plates 17 and 19 which are the joint fittings. H-shaped steel beams 2, 12, 16, 1 of each joint fitting 3, 14, 17, 19
For fixing to No.8, 2 bolts with a diameter of 22 mm should be used with 4 in a row.
Use a total of 8 rows. As a shear resistance tool, a nominal diameter of 24
mm one side bolt 8 was used.

(Embodiment 5) An embodiment in which an H-shaped steel beam 2 is joined to one side plate 4a of a rectangular steel tubular column 1 will be described with reference to FIG. In the case of FIG. 5, unlike the case where the plate-shaped joining metal fitting 3 is fixed to the outside of the flange 5 of the H-shaped steel beam 2 in FIG. 1, plate-shaped joining is performed on both sides inside the flange 5 of the H-shaped steel beam 2. Fix the metal fittings 3a, 3b. Since the other points are the same as those in the first embodiment, the description thereof will be omitted.

[0022]

According to the present invention, the following effects can be obtained. (1) The joint structure of the rectangular steel tube column and the H-shaped steel beam of the present invention is
Since the joining metal fitting fixed to the H-shaped steel beam is joined to the square steel pipe column using through bolts, there is less deformation at the joint,
The deformation that has occurred in the conventional technology can be greatly suppressed and reduced. (2) It has an excellent stress transmission mechanism at the joint. That is,
Since the structure is such that the through bolts are inserted through the side plates facing each other of the rectangular steel pipe column, the entire cross section of the rectangular steel pipe column is organically integrated and counteracts the external force from the H-shaped steel beam. In this respect, in contrast to the conventional technique in which the H-shaped steel beam is joined to only the individual side plates of the square steel tubular column by the one-side bolt, there is a significant difference in deformation. (3) The joint structure of the rectangular steel tube column and the H-shaped steel beam of the present invention is
It is not complicated in structure, easy to manufacture, and inexpensive. Also, the parts involved in the joint structure are small, and the number thereof can be small. When joining the H-shaped steel beams to the opposite side plates of the rectangular steel tube column as shown in FIG. 2, common through bolts can be used, and the work is easy, reliable, and the manufacturing accuracy is good. As a result, the number of bolts to be managed decreases. (4) Lever reaction force can be advantageously reduced when tightening through bolts for joining the rectangular steel tube column and the H-shaped steel beam, and the proof stress of the bolt can be effectively utilized. (5) Since the structure is simple and no welding work is required, not only is the manufacturing easy and inexpensive, but also the quality of the joint structure can be stably secured.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a case where an H-shaped steel beam is joined to one side plate of the rectangular steel tubular column in the joining structure of the rectangular steel tubular column and the H-shaped steel beam of the present invention. (A) is a side view, (B) is a plan view, and (C) is a cross-sectional view taken along the line AA of (A).

FIG. 2 is a diagram illustrating a case where an H-shaped steel beam is joined to opposite side plates of the rectangular steel tubular column in the joining structure of the rectangular steel tubular column and the H-shaped steel beam of the present invention. (A) is a side view, (B) is a plan view, and (C) is a cross-sectional view taken along the line AA of (A).

FIG. 3 is a diagram illustrating a case where a rectangular steel tube column and an H-shaped steel beam are joined to each other in a planar T-shaped orthogonal cross-section to the rectangular steel tube column in the joint structure of the present invention. (A) is a side view,
(B) is a plan view and (C) is a sectional view taken along the line AA of (A).

FIG. 4 is a diagram illustrating a case of joining a rectangular steel tube column and an H-shaped steel beam by directly intersecting the rectangular steel tube column in a plane in a cross shape in the joining structure of the present invention. (A) is a side view,
(B) is a plan view and (C) is a sectional view taken along the line AA of (A).

FIG. 5 is a perspective view of the present invention, in which the metal fittings in FIG.
It is a figure which shows the case where it arranges inside the flange of an H-shaped steel beam unlike the case where it arranges outside the flange of a section steel beam.

FIG. 6 (a) is a diagram for explaining the transmission of force by using a through bolt in the present invention. (B) shows the case where the conventional one side bolt is used.

FIG. 7 is a diagram illustrating a conventional technique. (A) is a side view and (B) is a plan view.

FIG. 8 is a diagram illustrating another conventional technique. (A) is a sectional view taken along line AA of (B), and (B) is a side view.

FIG. 9 is a view showing deformation of a cross section of a rectangular steel tube column when an external force is applied in the conventional technique.

[Explanation of symbols]

 1 Rectangular Steel Pipe Column 2 H-Shaped Steel Beam 3 Plate-Shaped Metal Fitting 4 Side Plate 5 Flange 6 Bolt / Nut 7 Through Bolt 8 One-Side Bolt 9 Web 10 Angle 11 Bolt / Nut 12 H-Shaped Steel Beam 13 Flange 14 Plate-shaped Joining Metal fitting 15 Web 16 H-shaped steel beam 17 Plate-shaped joining metal fitting 18 H-shaped steel beam 19 Plate-shaped fitting metal fitting 20 Bolt / nut 21 Split stay 22 Web part 23 One side bolt 24 Flange part 25 Side plate 26 L-shaped steel Reinforcement member 27 Joining bracket 28 H-shaped steel beam 29 One side bolt

Claims (5)

[Claims] 1. A plate-shaped joint fitting is separately fixed by bolts along the upper and lower flanges of the end of the H-section steel beam at the joint between the rectangular steel tube column and the H-section steel beam, A rectangular steel pipe column characterized in that the connecting metal fixture is fixed to the rectangular steel pipe column by a through bolt inserted through a hole penetrating in the length direction of the connecting metal pipe and a cross section of the rectangular steel pipe column. H
Joint structure with shaped steel beam. 2. A plate-shaped member formed by bolts along the upper and lower flanges of one of the H-shaped steel beams at a joint where the rectangular steel tubular column and the H-shaped steel beam are laterally orthogonal to each other in a cross shape. Of the H-shaped steel beam is fixed, and the plate-shaped joining metal is separately fixed along the upper and lower flanges of the end of the other H-shaped steel beam with bolts. And a joint bolt fixed to the square steel tube column by a common through bolt inserted across the cross section of the square steel tube column, and the joint structure of the square steel tube column and the H-shaped steel beam. . 3. A joint structure between a rectangular steel tube column and an H-shaped steel beam according to claim 1, at a joint portion where the H-shaped steel beam is two-dimensionally orthogonal to a T-shape at the same height of the rectangular steel tube column. Item 2
A joint structure of a rectangular steel pipe column and an H-shaped steel beam, comprising the joint structure of the rectangular steel pipe column and an H-shaped steel beam described above. 4. The plate-like joining metal fitting is fixed along the outside of the upper and lower flanges of the end of the H-shaped steel beam, as claimed in claim 1, claim 2, or claim 3. The joint structure of the rectangular steel pipe column according to 3 and the H-shaped steel beam. 5. A plate-like joining metal fitting is fixed along both sides of the upper and lower ends of the H-shaped steel beam along the inner sides of the lower flange, respectively. Alternatively, the joint structure of the rectangular steel pipe column and the H-shaped steel beam according to claim 3.