JP2000160679A - Eccentric connection structure for beam and column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-construct eccentric connection structure for a beam and a column in which the beam can be connected eccentrically in the side, firmly in the strength, and stably in the dynamics by bolts, to the peripheral side face of the column, opposite to the beam end by using an end plate. SOLUTION: Horizontal rib plates 4, 4 are connected to the side part of the opposite side against the eccentric side in the end of a beam 2, and the width of the beam end is widened. An end plate 5 is welded with the beam end together with the rib plates 4, 4. The end plate 5 is connected to the side face 1a of the column 1 opposite to the beam end by bolts 7 in both upper and lower zones including the widened beam end to eccentrically connect the beam 2 and the column 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eccentric joint structure between a beam and a column used in a building such as a steel frame.

[0002]

2. Description of the Related Art For example, in a steel-framed building, as shown in FIG. 4, a beam 52 made of an H-section is joined to a side surface of a column made of a square steel pipe. In some cases, a structure in which the welded end plate 53 is bolted to the side surface of the column 51 facing the beam end 54 is used.

[0003]

By the way, as shown in FIG. 5, the end of the beam 52 having a width smaller than the column width is shifted laterally from the center position C with respect to the side of the column 51 facing the beam end. It may be required to join with eccentricity. For example,
To improve the efficiency of the connection with the outer panel and floor, beams 5
The beam 52 is positioned at the center position C of the column 51 so that the column 2 and the column 51 are flush or almost flush with the ridges of the outer wall panel 56.
This is the case where the outer wall panel 56 is to be joined eccentrically.

In such a case, in the eccentric joining structure as shown in FIG. 5, the mounting area of the bolts 54 for joining the end plate 53 to the column 51 is sufficiently secured when the eccentricity of the beam 52 is detected. May not be done. For example, as shown in the figure, when the beam 52 is made of H-section steel, the beam web 52a is located in the bolt attachment area, which makes bolt joining in that area difficult. This reduces the number of eccentric bolts 54 and makes the mounting position of the bolts 54 asymmetrical with respect to the center C of the column 51.
The beam 52 is eccentric, but the beam 52
When a force acting in the direction away from 1 acts on the eccentric bolts 54.
4 increases the mechanical load and weakens the joining force between the beam 52 and the column 51.

[0005] Therefore, as an eccentric bonding structure in such a case, as shown in FIGS. 6A-1 and 6A-2, the columns 51 are provided with diaphragms 57, 57, and the diaphragms 57, 57 are provided with beams 52. In this case, a column 51 having through-diaphragms 57, 57 must be formed, and welding between the beam 52 and the column 51 requires on-site welding. There may be problems, such as the need.

Further, as shown in FIG. 6B, a joining structure in which the pillar 51 is provided with inner diaphragms 58 and 58 and the end of the beam 52 is welded to the outer surface of the pillar 51 is also conceivable. In addition to the need for welding at
In the case of 1, since the outer periphery of the corner of the column 51 is a circular arc, if the beam 52 is eccentrically welded, there is a problem that poor welding is likely to occur at the corner of the column 51.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a beam that can be securely bolted to an end peripheral surface of a pillar in a laterally eccentric state by using an end plate. An object of the present invention is to provide an eccentric joining structure between a pillar and a column.

[0008]

An object of the present invention is to provide a beam having a width smaller than a column width and eccentrically joining the beam to the peripheral side surface facing the beam end of the column from the center thereof to the side. In a joining structure, a rib is joined to a side of the beam opposite to the eccentricity at the end of the beam to increase the width of the beam end, and an end plate is joined to the beam end including the rib. The end plate is bolted to the beam end facing side surface of the column in both upper and lower regions sandwiching the widened beam end, and the beam and the column are eccentrically joined. The eccentric joint structure solves the problem.

In this eccentric joining structure, when a force is applied to the beam in a direction away from the column, the stress from the beam is transmitted to the end plate through the rib in addition to the beam. As a result, stress is transmitted symmetrically from the beam to the end plate, and the stress generated in each bolt connecting the end plate and the column is equalized. As a result, it is possible to increase the joint force between the beam and the column, and to securely bolt the beam to the side of the column facing the beam end in a laterally eccentric state.

In addition, since the end plate is configured to be bolted to the side of the pillar opposite to the beam end in both upper and lower regions sandwiching the widened beam end, the number of bolts to be attached in the left-right direction is increased. Therefore, the mechanical load of each bolt can be reduced, and the joining force between the beam and the column can be further increased.

In addition, the above-mentioned bolt connection with good mechanical stability can be realized only by joining the ribs, so that the construction is very easy and the cost can be kept low.

In the above-described eccentric joining structure, when the beam is most commonly made of H-section steel, horizontal rib plates are joined to upper and lower beam flanges at the side of the anti-eccentric beam at the end of the beam. If the width of the beam end is enlarged in such a manner, the above-described eccentric joint structure can be obtained with a simple structure and good workability.

[0013]

Next, an embodiment of the present invention will be described.

The embodiment shown in FIGS. 1 to 3 is applied to a steel-framed building. The pillar 1 of the building frame is made of a square steel pipe, and the beam 2 is made of an H-shaped steel. The width of beam 2 is
It is smaller than the width of pillar 1. In order to shorten the distance between the beam 2 and the outer wall panel 3 and improve the efficiency of the connection with the outer wall panel 3 and the like, the beam 2 has a pillar 1
The outer wall panel 3 is eccentric from the center C of the beam end facing side surface portion 1a of the column 1 so as to be flush or almost flush with the end plate 5 in this eccentric state.
Is joined to the beam end opposing side surface portion 1a of the column 1 via.

In this eccentric joining structure, a rib 4 is joined to the end of the beam 2 on the side of the beam opposite to the eccentric beam, and the width of the end of the beam 2 is enlarged by the rib 4. Have been. In the case of the illustrated embodiment, the ribs 4 are composed of horizontal rib plates, and the horizontal rib plates 4, 4 are respectively joined to the side portions of the upper and lower beam flanges 2b, 2b to enlarge the width of the beam ends. I have. The ribs 4 and 4 are connected to the beam 2 to
Are dimensioned so that the width of the end portion is equal to or approximately equal to the width of the column 1.

An end plate 5 is welded to the end of the beam while including the horizontal rib plates 4 and 4 in the plane. The width of the end plate 5 is set to be equal to or substantially equal to the width of the column 1. The end plate 5 is welded to the beam 2 and the horizontal rib plates 4, 4 so that stress from the beam 2 is transmitted to the end plate 5 through the horizontal rib plates 4, 4 in addition to the beam 2. I have.

The end plate 5 is set concentrically or almost concentrically on the beam end facing side surface portion 1a of the column 1, and in the upper and lower regions sandwiching the beam 2 and the horizontal rib plates 4, 4, the column 1 The beam 2 and the column 1 are eccentrically joined to each other by the bolt joints 7 to the side surfaces 1a of the beam ends facing each other. The bolt connection is performed using, for example, a one-side bolt. In the case of the illustrated embodiment, the bolts are not attached in the region between the beam flanges 2b, 2b and between the horizontal ribs 4, 4.

In the above eccentric joining structure, when a force acting on the beam 2 in a direction away from the column 1 is applied, the stress from the beam 2 is:
In addition to the beam 2, it is transmitted to the end plate 5 through the horizontal rib plates 4 and 4. Therefore, stress is transmitted symmetrically from the beam 2 to the end plate 5, and the mechanical loads of the bolts 7 joining the end plate 5 and the column 1 are averaged, and the eccentricity is increased. The mechanical load on the bolts 7 is reduced. Moreover, by increasing the number of bolts attached in the left-right direction in both the upper and lower regions sandwiching the widened beam end, the mechanical load of each bolt 7 is further reduced. In this manner, the beam 2 is connected to the beam end facing peripheral side surface portion 1 of the column 1.
The bolts 7 are firmly and strongly joined in a laterally eccentric state with respect to a.

In this embodiment, an H-section steel is used as the beam 2, and the horizontal rib plates 4, 4 are respectively connected to the upper and lower beam flanges 2b, 2b to reduce the width of the end of the beam 2. Since the configuration is enlarged, the eccentric joining structure as described above can be realized with a simple structure and good workability.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, the column may be of various cross-sectional structures including a beam end opposing side portion such as an H-shaped steel in addition to a square steel pipe, and beams may be of various cross-sectional structures such as an H-shaped steel and a channel steel. It may be.
Also, the rib may have any structure as long as it has a structure in which the width of the end of the beam is enlarged and stress from the beam is equalized in the right and left direction and transmitted to the end plate, and various types of ribs may be used. As for the type of bolt joint, in addition to the one-side bolt, a bolt is screwed into a screw hole provided in a pillar wall and joined, or a bolt is screwed into a nut prepared in a pillar and joined. Various types of bolt joints, such as those, may be used.

[0021]

As described above, the eccentric joining structure of the beam and the column according to the present invention has the above-mentioned structure provided with the rib for widening the beam end. When a force is applied, the mechanical load of each bolt in the left and right direction can be equalized, the mechanical load of the eccentric bolt can be reduced, and the upper and lower sides of the widened beam end can be sandwiched. In both areas, the number of bolts to be installed can be increased in the left and right direction to further reduce the mechanical load on the eccentric bolts, thus strengthening the beam in a laterally eccentric state with respect to the peripheral side of the column opposite the beam end. Can be securely bolted.

[Brief description of the drawings]

1A and 1B show an eccentric bonding structure of an embodiment, wherein FIG. 1A is a cross-sectional plan view, and FIG. 1B is a cross-sectional view taken along line II of FIG. 1A.

FIG. 2 is an exploded perspective view, partly in section, of the same structure.

FIG. 3 is an exploded perspective view, partly in section, of the same structure when viewed in different directions.

4 shows a conventional example, and shows a beam / column centering joint structure using an end plate. FIG. 4 (a) is a cross-sectional side view, and FIG. 4 (b) is a line II in FIG. 4 (a). FIG. 1C is a view taken along the line II-II in FIG.

5A and 5B show a joint structure when the beam is eccentric to the side in the joint structure. FIG. 5A is a cross-sectional side view, and FIG. 5B is a view taken along line II of FIG. FIG.

FIG. 6 is a diagram showing a related technique, and is shown in FIG.
2) is a sectional side view and a side view showing an eccentric joining structure by welding using a through diaphragm, and FIG. 2B is an enlarged sectional plan view showing an eccentric joining structure by welding using an inner diaphragm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Column 1a ... Beam end opposing side surface part 2 ... Beam 2b ... Flange 4 ... Horizontal rib plate (rib) 5 ... End plate 7 ... Bolt

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Usami Building F-term (reference) 2E125 AA04 AA14 AB01 AB16 AC15 AC16 AG03 AG04 AG12 AG32 AG43 in 1-5-16 Awaza, Nishi-ku, Osaka-shi, Osaka AG57 BE10 CA05

Claims (2)

[Claims] An eccentric joining structure of a beam and a column, wherein a beam having a width smaller than the column width is eccentrically joined to a beam end-facing peripheral side surface portion from a center to a side thereof, and the beam has an end. The rib is joined to the side of the waist opposite to the eccentric wavy portion to increase the width of the beam end, and the end plate is joined to the beam end including the rib, and the end plate is widened. An eccentric joint structure between a beam and a column, wherein the beam and the column are eccentrically joined to each other by bolts to the side surfaces of the column opposite to the beam end in both upper and lower regions sandwiching the beam end. 2. The beam is made of H-section steel, and horizontal rib plates are respectively connected to upper and lower beam flanges at the side of the anti-eccentricity at the end of the beam, so that the width of the beam end is enlarged. The eccentric joint structure between a beam and a column according to claim 1, wherein: