JPH10227063A - Joint structure of square steel pipe column and h-sectional beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a square steel pipe column and H-sectional beam joint structure with each of construction and excellent strength. SOLUTION: A joint structure has a splice plate 21 welded to the side face of an square steel pipe column 11 and extended in a preset length to the cross direction of the square steel pipe column 11, connection members 23, 25 mounted between the extended part of the splice plate 21 and each of the flanges 51, 52 of an H-sectional beam 5 to connect both of them, the first bolts 30, 31 to join the connection members 23, 25 to the extended part of the splice plate 21 and the second bolts 32 to join the connection members 23, 25 to the flanges 51, 52 of the H-sectional beam 5. The first bolts 30, 31 are arranged upward and downward of the upper and lower flanges 51, 52 of the H-sectional beam 5 with the respective flanges 51, 52 therebetween.

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 square steel tubular column and an H-shaped beam in an architectural steel structure.

[0002]

2. Description of the Related Art FIG.
FIG. 9 is a perspective view showing a conventional joint structure of a rectangular steel pipe section column and an H-section beam described in Japanese Patent Publication No. 9; Referring to FIG. 26, the structure of the conventional example will be described. A steel beam-column connection member 4 is formed by connecting a column connection member 3 to one end of one side 2 of a beam connection member 1 having an L-shaped cross section. A plurality of high-strength bolts are formed by superposing the other side 7 of the beam connecting member 1 of the steel column-beam connecting member 4 on both sides in the width direction of the surface of each flange 6 at the end of the H-shaped steel beam 5. And the column connecting member 3 of the steel beam-column connecting member 4 is overlapped on the opposing side surface 11 of the square steel pipe column 9 and tightened and connected by a plurality of bolts 10 formed of blind bolts. Things.

[0003]

However, the beam flange-side bolt joints of the above-described conventional joint structure of the rectangular steel pipe section column and the H-section beam must resist the shearing force in a one-sided friction state. Therefore, when the required number of bolts increases, the length of the joining member increases, which is uneconomical. In particular, when the column diameter is small, even if the minimum bolt pitch is used, the number of pieces that can be arranged in a row is limited, and the design strength may not be satisfied. Further, even if the number of bolts is increased to two or three in the design, the strength of the column is reduced due to the lack of holes in the column, so that the number of bolts cannot be increased in many cases. For these reasons, it is presumed that this joining type is not often realized in practice.

A bolt 8 for connecting the steel beam-to-column connecting member 4 and the flange 6 and a bolt 10 for connecting the steel beam-to-column connecting member 4 and the square steel pipe column 9 are eccentrically arranged in the horizontal direction. This causes the following problems. FIG.
FIG. 7 is an explanatory diagram for explaining the effect of the horizontal eccentricity of the bolts 8 and 10. The influence of horizontal eccentricity will be described with reference to FIG. The horizontal eccentric distance between the bolt 8 and the bolt 10 is e1, the force that the steel beam-column connecting member 4 receives from the bolt 8 is P, and the steel beam-column connecting member 4 is the bolt 10
Assuming that the force received from is P1 (P = P1), a moment of M = P · e1 acts on the steel beam-column connection member 4.

Further, as shown in FIG. 28, the tensile force P affects the vertical member of the steel beam-column connection member 4 as a vertical moment T having an eccentric distance e2. Here, e2 is the vertical eccentric distance between the bolt 8 and the bolt 10. Therefore, the longitudinal member of the steel beam-column connection member 4 must resist not only the tensile force P but also the horizontal moment M and the vertical moment T. The torsion deformation occurs in the connecting portion 4a between the beam connecting member 1 and the column connecting member 3 as shown in FIG. Before such a state is reached, in order for the H-shaped cross-section beam to reach a predetermined proof strength, measures such as increasing the thickness and strength of the steel column-beam connecting member 4 are required, resulting in an uneconomical design. I was

[0006] As described above, the H-shaped steel beam 5 shown in FIG.
When the force G as shown in FIG. 1 is applied, the web of the H-shaped steel beam 5 is not restrained, so that the H-shaped steel beam 5 receives a shearing force in the flange 6 near the end face of the beam connecting member 1. In addition, there is a problem that deformation as shown in FIG. 30 occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to obtain a joint structure between a rectangular steel pipe column and an H-shaped beam which is simple in construction and excellent in strength. .

[0008]

According to the present invention, there is provided a joint structure of a rectangular steel pipe column and an H-shaped cross-section beam according to the present invention, which is welded to a side surface of the rectangular steel pipe column and extends a predetermined length in the width direction of the rectangular steel pipe column. An attachment plate, a connecting member interposed between the extension of the attachment plate and the flange of the H-shaped beam for connecting the two, and connecting the connection member and the extension of the attachment plate Multiple first
A bolt, and a second bolt for connecting the connecting member and the flange of the H-shaped section beam, wherein the plurality of first bolts sandwich each flange with respect to upper and lower flanges of the H-shaped section beam. Are arranged vertically.

[0009] Further, it is welded to the side surface of the square steel pipe column,
It has an attachment plate extending a predetermined length in the width direction of the rectangular steel tubular column, and a connecting member interposed between the extension portion of the attachment plate and the flange of the H-shaped cross-section beam and bolting them together. The connecting member, which is arranged on the outer surface side of the flange of the H-shaped cross-section beam, is constituted by a channel-shaped member having a U-shaped cross section.

Further, a plurality of first bolts are vertically symmetrically arranged with respect to the flange of the H-shaped section beam, and the first bolts disposed on the outer surface side of the flange of the H-shaped section beam in the connecting member are U-shaped in section. It is constituted by a channel-shaped member having a shape like a letter.

Further, a rib member is provided between both side pieces of the groove-shaped member.

Further, a stiffener is installed at an end of the H-shaped section beam, and the rectangular steel pipe column and the H-shaped section beam are connected without connecting the web of the H-shaped section beam and the square steel pipe column.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a perspective view of one embodiment of the present invention, and FIG. 2 is a front view of one side surface of FIG. Hereinafter, the present embodiment will be described with reference to FIGS. The same parts as those in FIGS. 23 to 27 showing the conventional example are denoted by the same reference numerals. The outline of the structure of the present embodiment is as follows. A side plate 11 extending a predetermined length in the width direction of the rectangular steel pipe column 11 is welded to a side surface 11a of the rectangular steel pipe column 11 to be welded. The upper and lower flanges 51 and 52 of the H-shaped cross-section beam 5 are bolted together via an angle-shaped metal member 23 and a channel-shaped metal member 25 having a U-shaped cross section. A shear plate 26 is welded to the center of each side surface of the rectangular steel tube column 11 (see FIG. 2), and the shear plate 26 and the web 53 of the H-shaped section beam 5 are bolted as shown in FIG. Have been.

Next, the respective elements constituting the bolted joint will be described in detail. As shown in FIG. 3, the attachment plate 21 is previously assembled in a cross-girder shape and inserted into the square steel tubular column 11, and the fillet welding is performed. Is joined to the square steel tube column 11. A plurality of bolt holes 21a are formed at symmetric positions of the upper and lower portions of the extension of the attachment plate 21 along the extension direction. Further, the upper and lower flanges 51 of the H-shaped section beam 5,
A plurality of bolt holes 5a are also formed along the axial direction of the beam at both sides at the end of the portion 52. Further, the width of the grooved metal 25 is formed to be substantially the same as the distance between the opposed extending portions of the attachment plate 21, and a plurality of bolts are provided on both side pieces along the axial direction of the grooved metal 25. A hole 25a is provided. Also, a plurality of bolt holes 25b are formed on both sides of the intermediate piece of the channel-shaped metal piece 25 along the axis thereof. The angled metal member 23 has an L-shaped cross section, and a plurality of bolt holes 23a are formed on both sides thereof along the axial direction.

Next, the joining structure of the above components will be described in more detail. Attached plates 21 previously assembled in a girder shape are joined to the rectangular steel pipe column 1 at predetermined intervals in the vertical direction of the rectangular steel pipe column 11. The ends of the H-shaped cross-section beam 5 are arranged such that the upper and lower flanges 51 and 52 are located in the middle of the upper and lower attachment plates 21 respectively. The groove-shaped metal member 25 is disposed on the upper surface of the upper flange 51, and the attachment plate 21 and the groove-shaped metal member 25 are bolted to each other by the bolt holes 21a and the bolts 30 inserted into the bolt holes 25a. One piece of the angled metal piece 23 is disposed in contact with the lower surface of the upper flange 51, and the other piece is disposed in contact with the inner surface of the attachment plate 21. The attachment plate 21 and the angled metal piece 23 are provided separately. Bolts are joined by bolts 21 inserted into the bolt holes 21a and the bolt holes 23a. And the channel-shaped hardware 25, the upper flange 51, and the angle-shaped hardware 23 are bolt holes 25a, 5a, 2 provided in these three members.
Bolts are joined by bolts 32 inserted through 3a. Note that the lower flange 52 has the same configuration.

FIGS. 4 and 5 are explanatory views for explaining a joint state between the shear plate 26 and the web 53 of the H-shaped section beam 5. FIG. The shear plate 26 and the web 53 of the H-shaped section beam 5 are
As shown in FIGS. 4 and 5, the shear plate 26 and the web 53 are bolted together in a single shear state.

As described above, according to the present embodiment, the attachment plate 21 is joined to the square steel tube column 11 by welding, so that it is necessary to bolt the square steel tube column 11 and the attachment plate 21 with bolts. In addition, the proof stress of the rectangular steel tube column 11 does not decrease due to the hole loss. The horizontal displacement between the position of the bolt 32 and the joining position of the attachment plate 21 with respect to the square steel tubular column 11 generates a horizontal rotational force in the channel metal member 25, but the channel metal member 25 is formed integrally. Therefore, as in the conventional example, the steel column-beam connecting member 4 having the left and right L-shaped cross sections.
The problem that the (attachment plate 21) is bent does not occur. Further, in the vertical direction, the bolts 30 and the bolts 31 are disposed vertically above and below the attachment plate 21 with the flanges 51 and 52 interposed therebetween, so that the force acting on the attachment plate 21 is canceled and the attachment plate 21 is twisted. Has the effect of suppressing the occurrence of

Here, as shown in FIG.
When the vertical force F acting on the grooved metal 25 is transmitted from the H-shaped beam 5 to the side plate 21, the bottom plate 25c
When the vertical force F is large, the bottom plate 25c of the grooved metal 25 is curved as shown in FIGS. Therefore, in order to suppress the out-of-plane bending of the bottom plate 25c of the grooved metal 25 against the force F and efficiently transmit the force F to the side plate 21, as shown in FIG. A rib 25e may be provided between both side pieces 25d. The number of the ribs 25e may be two as shown in FIG. 9, but is not limited thereto.
It may be a book or three or more.

As shown in FIG. 10, the axial length of the grooved metal 25 is D, and two ribs 2 of the grooved metal 25 are provided.
The length between 5e is d ₁ , the length from the installation position of one rib 25e to the end of the channel metal piece 25 is d ₂ , and the other rib 25
The distance from the installation position of e to the end of the channel hardware 25 is d ₃
When the rib 25e is installed, the groove-shaped metal 25
The axial length, as shown in FIG. 11, it is possible to suppress the length d ₁ between the ribs 25e. By doing so, the weight of the entire channel-shaped hardware 25 can be reduced.
Since it is assumed that the joining of the grooved hardware 25 is performed manually at the construction site, the weight can be reduced to a weight that can be held by human hands, and the working efficiency is improved. be able to.

In the above description, the two-sided pieces 25d of the channel-shaped hardware 25 are arranged so as to be in contact with the side plates 21, but when the ribs 25e are provided, the direction of the channel-shaped hardware 25 is horizontal. Alternatively, the rib 25e may be rotated by 90 degrees in the direction and the rib 25e is brought into contact with the side plate 21 as shown in FIG. In this case, a bolt hole for joining to the side plate 21 is provided in the rib 25e. By doing so, the grooved metal 25 is drilled only on the horizontal surface of the bottom plate 25c, and it is possible to simultaneously drill the grooved metal 25 and the rib 25e using a plurality of drilling lines. This makes it possible to shorten the factory processing steps as a whole.

In the above description, the ribs 25e are arranged inside the both-side pieces 25d of the groove-shaped metal piece 25. However, as shown in FIG. , That is, on both end faces of the channel-shaped hardware 25.

Embodiment 2 FIG. In the first embodiment, the angle-shaped metal fitting 2 is provided inside the upper and lower flanges 51 and 52.
Although the example in which 3 is installed is shown, a groove-shaped metal 24 as shown in FIG. 14 may be used instead of the angle-shaped metal 23. By using such a grooved metal piece 24, one end of the grooved metal piece 24 comes into contact with the web 53, so that the position of the bolt 32 and the joining position of the attachment plate 21 to the square steel pipe column 11 are determined. It is possible to more effectively resist the influence of the horizontal displacement.

Embodiment 3 FIG. As shown in FIG. 15, the attachment plate 21 may be formed in a cross shape, and the member formed in this manner may be installed on the side surface of the square steel pipe column 11. According to this example, it is possible to avoid the inconvenience at the time of joining the side plate and the steel pipe due to the dimensional error of the square steel pipe column 11 as compared with the case where the steel pipe is assembled in advance in the shape of a cross beam shown in FIG.

Embodiment 4 FIG. 16 is a front view of another embodiment of the present invention. In the present embodiment, an example is shown in which the H-shaped cross-section beam 5 is displaced to the left in the drawing from the axis of the rectangular steel tube column 11. In this case, as shown in the figure, the horizontal sides of the angled hardware 23 arranged on the right side in the figure may be set to the long dimension, and the horizontal sides of the angled hardware 23 arranged on the left side may be set to the short dimension. . According to the present embodiment,
Since the H-shaped section beam 5 can be displaced in the left and right direction from the axis of the square steel tube column 11, the degree of freedom in the arrangement of the H-section beam 5 and the square steel tube column 11 is increased.

Embodiment 5 FIG. 17 and 18 are front views of another embodiment of the present invention. In the present embodiment, the shear plate 26 and the web 53 of the H-shaped section beam 5 are bolted to each other via two splice plates 35 in a double shear state. FIG. 17 shows an example of the first embodiment in a double shear state, and FIG. 18 shows an example of the third embodiment in a double shear state. FIG.
9 and 20 are explanatory views for explaining the two-plane shearing state, FIG. 19 is a side view, and FIG. 20 is a plan view. As can be seen from these figures, the shear plate 26 and the web 53 of the H-shaped cross-section beam 5 are respectively arranged in abutting state, and in this state, the splice plate 35 is arranged from both sides of both to extend the bolt. They are joined.

Embodiment 6 FIG. FIG. 21 and FIG. 22 are explanatory diagrams illustrating Embodiment 6 of the present invention. In the present embodiment, a case where the joining strength of the joint region between rectangular steel tube column 11 and supporting plate 21 (a portion surrounded by a broken-line circle in FIG. 21) (hereinafter, this region is referred to as a “panel zone”) is weak. First, the joining strength is increased by increasing the width of the attachment plate 21 in the panel zone.
In this case, the plate width may be widened as in the case of the attachment plate 21A on the right side in the figure shown in FIG. 22, or the width of the panel zone may be increased as in the attachment plate 21B shown on the left side in the figure. Only the plate width may be widened.

Instead of being vertically separated as in the case of the attachment plate 21A, the attachment plate 21C shown in FIG.

Embodiment 7 FIG. 24 is an explanatory diagram of another embodiment of the present invention. In the seventh embodiment,
The stiffener 40 is provided at the end of the H-shaped section beam 5. The stiffener 40 in the present embodiment is shown in FIGS.
As shown in FIG.
A rectangular steel plate extending therebetween is provided on both sides of the web 53. By disposing the stiffener 40 at the end of the H-shaped section beam 5 in this manner, it is possible to suppress the cross-sectional deformation of the H-shaped section beam 5 as shown in FIG. Plate 26 and H-section beam 5
It may not be necessary to join the web 53 with
In such a case, the work of bolt connection at this portion can be omitted, so that workability is improved.

[0029]

As described above in detail, in the present invention, a plurality of first bolts for connecting the connecting member and the extension of the attachment plate are connected to each of the upper and lower flanges of the H-shaped cross-section beam. Since the connecting members are arranged vertically, the twisting of the connecting members in the vertical direction does not occur.

Further, since the connecting member, which is arranged on the outer surface side of the flange of the H-shaped section beam, is formed of a channel-shaped member having a U-shaped cross section, the extension of the attachment plate may be bent. And stable bolt joining can be realized.

Further, since the rib member is provided between the both sides of the groove-shaped member, it is possible to prevent the groove-shaped member from being bent and deformed.

Further, since the stiffener is installed near the end of the H-shaped beam and the rectangular steel tube column and the H-shaped beam are connected without connecting the web of the H-shaped beam and the square steel tube column, the stiffener is connected. The structure is simplified and workability is improved.

[Brief description of the drawings]

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

FIG. 2 is a front view of one side in the embodiment shown in FIG. 1;

FIG. 3 is an explanatory view of a joint state between a rectangular steel pipe column and a side plate according to an embodiment of the present invention.

FIG. 4 is an explanatory view (side view) of a joint state between a shear plate and a web having an H-shaped cross section in one embodiment of the present invention.

FIG. 5 is an explanatory view (plan view) of a bonded state of the shear plate and the web of the H-shaped cross section in the embodiment of the present invention.

FIG. 6 is an explanatory view of a state where a vertical force F is applied in one embodiment of the present invention (side view).

FIG. 7 is an explanatory view of a state in which a vertical force F is applied according to the embodiment of the present invention (front view).

FIG. 8 is a perspective view showing a deformed state of the channel metal member 25 according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram of another mode of the groove-shaped metal member 25 according to the embodiment of the present invention.

FIG. 10 is a diagram illustrating a groove-shaped metal member 25 according to an embodiment of the present invention.
It is explanatory drawing of the dimensional relationship of.

FIG. 11 shows a groove-shaped metal member 25 according to an embodiment of the present invention.
FIG. 11 is an explanatory diagram of another embodiment of FIG.

FIG. 12 shows a groove-shaped metal member 25 according to an embodiment of the present invention.
FIG. 11 is an explanatory diagram of another embodiment of FIG.

FIG. 13 shows a groove-shaped metal member 25 according to an embodiment of the present invention.
FIG. 11 is an explanatory diagram of another embodiment of FIG.

FIG. 14 is a front view of one side according to another embodiment of the present invention.

FIG. 15 is a perspective view showing a joint state of the attachment plate in another embodiment of the present invention.

FIG. 16 is a front view showing a joint state of beams in another embodiment of the present invention.

FIG. 17 is a front view showing a joined state in another embodiment of the present invention.

FIG. 18 is a front view showing a joined state in another embodiment of the present invention.

FIG. 19 is an explanatory view (side view) of a joint state between a shear plate and an H-shaped beam web in another embodiment of the present invention.

FIG. 20 is an explanatory view (plan view) of a joint state between a shear plate and a web having an H-shaped cross section in another embodiment of the present invention.

FIG. 21 is a side view illustrating a joining state of the attachment plates in the embodiment of the present invention.

FIG. 22 is a side view illustrating a joint state of the attachment plate according to another embodiment of the present invention.

FIG. 23 is an explanatory view illustrating another mode of the attachment plate in another embodiment of the present invention.

FIG. 24 is a perspective view of another embodiment of the present invention.

FIG. 25 is an explanatory diagram of another embodiment of the present invention shown in FIG.

FIG. 26 is a perspective view of a joint between a conventional rectangular steel pipe column and an H-shaped section beam.

FIG. 27 is a plan view of a joint between the rectangular steel tubular column of the conventional example shown in FIG. 26 and an H-shaped section beam.

FIG. 28 is an explanatory diagram of a problem of the conventional example shown in FIG. 26;

FIG. 29 is an explanatory diagram of the problem of the conventional example shown in FIG. 26;

FIG. 30 is an explanatory diagram of a problem of the conventional example shown in FIG. 26;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Square-shaped steel pipe column 5 H-shaped section beam 21 Attached plate 23 Angle-shaped hardware 25 Channel-shaped hardware 25e Rib 30, 31, 32 Bolt 51, 52 Flange 53 Web

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Minoru Hirota, 1-2-1, Marunouchi, Chiyoda-ku, Tokyo, Japan Inside Nihon Kokan Co., Ltd. (72) Inventor Shigeki Ito 1-2-1, Marunouchi, Chiyoda-ku, Tokyo, Japan Honko Co., Ltd.

Claims (5)

[Claims] 1. An attachment plate which is welded to a side surface of a rectangular steel pipe column and extends a predetermined length in a width direction of the rectangular steel pipe column, and between an extension portion of the attachment plate and a flange of an H-shaped section beam. A connecting member interposed therebetween for connecting the two, a plurality of first bolts connecting the connecting member and the extension of the attachment plate, a flange of the connecting member, the flange of the H-shaped section beam, A square steel pipe column and an H-shape, wherein the plurality of first bolts are arranged vertically above and below each of the upper and lower flanges of the H-shaped cross-section beam with each flange interposed therebetween. Cross-section beam joint structure. 2. An attachment plate which is welded to a side surface of a rectangular steel tubular column and extends a predetermined length in a width direction of the rectangular steel tubular column, and between an extending portion of the additional plate and a flange of an H-shaped section beam. And a connecting member which is interposed and connected to each other by bolting, and the connecting member, which is disposed on the outer surface side of the flange of the H-shaped section beam, is formed by a U-shaped channel-shaped member. A joint structure of a square steel pipe column and an H-shaped cross-section beam, characterized in that: 3. A square steel tubular column according to claim 1, wherein the connecting member, which is disposed on the outer surface side of the flange of the H-shaped section beam, is formed by a channel-shaped member having a U-shaped cross section. H-shaped beam joint structure. 4. The joint structure according to claim 2, wherein a rib member is provided between both side pieces of said channel-shaped member. 5. A joint structure of a rectangular steel pipe column and an H-shaped beam in which a rectangular steel pipe column and an H-shaped beam are joined by bolts via a connecting member, wherein a stiffener is installed at an end of the H-shaped beam. A joint structure between a rectangular steel pipe column and an H-shaped section beam, wherein the square steel pipe column and the H-shaped section beam are connected without connecting the web of the H-shaped section beam and the square steel pipe column.