JP7397660B2 - Column beam joint structure - Google Patents

Description

The present invention relates to a column-beam joint structure in which a column and a beam are joined.

As shown in Non-Patent Document 1, there is a column-beam joint structure in which left and right H-shaped steel beams are eccentrically eccentric to one side in the front and back to a position where their axes do not intersect with the square steel pipe column in plan view, and are joined to the square steel pipe column. Are known. If such a fully eccentric type beam-column joint structure is adopted, it is possible to adopt a frame structure in which H-shaped steel beams are placed with large deviations from the center of the square steel pipe columns on the outer periphery of the building. It is possible to easily shorten the panel support bracket for fixing the exterior panel to the H-shaped steel beam on the outer periphery.

Tetsu Yamada and 3 other authors, “Study on the structural performance of non-intersecting column-beam joints”, published October 30, 2010, Architectural Institute of Japan Structural Engineering Transactions Vol. 75, No. 656, P1901-1908

In the column-beam joint structure described in Non-Patent Document 1, upper and lower wall plates to which the upper and lower flanges of the left and right H-shaped steel beams extending in the left-right direction are joined to the front and rear side walls of the square steel pipe column, A substantially rectangular cylindrical bracket having left and right wall plates to which the webs of the H-shaped steel beams are joined is joined, and the left and right H-shaped steel beams are joined to the square steel pipe column via the bracket. The bracket is considered to be joined by welding or the like to the column-side end surfaces of the upper, lower, left, and right wall plates and to the front and rear side plate portions of the rectangular steel pipe column.
However, in such a completely eccentric column-beam joint structure, it is desired to simply and firmly connect the square steel pipe column and the left and right steel beams.

The present invention has been made in view of the above-mentioned circumstances, and its main problem is to provide a horizontally extending left and right side eccentrically to one side of the front and back to a position where the axes do not intersect with the rectangular steel pipe column in plan view. An object of the present invention is to provide a column-beam joint structure in which an H-shaped steel beam is joined to the square steel pipe column, in which the square steel pipe column and the left and right steel beams can be easily and firmly joined.

A first characteristic configuration of the present invention is a column in which left and right H-shaped steel beams extending in the left and right direction eccentrically on one side of the front and back to a position where the axes do not intersect with the square steel pipe column in plan view are joined to the square steel pipe column. It has a beam joint structure,
The upper and lower diaphragms provided on the square steel pipe column are provided with overhanging parts that overhang on one side of the front and back to which the upper and lower flanges of the left and right H-shaped steel beams are joined,
Between the overhanging parts of the upper and lower diaphragms, left and right reinforcing side plates in a vertical position to which the webs of the left and right H-shaped steel beams are joined are provided,
With the left and right reinforcing side plates overlapping the column side portions on the other front and rear sides on the left and right side walls of the square steel pipe column, respectively, the peripheral edge portions of the column side portions are placed on the side wall portion of the square steel pipe column. It is joined to the square steel pipe column by fillet welding ,
A notch is provided on the diaphragm side side of the column side portion of the reinforcing side plate to avoid welding to the joint between the adjacent diaphragm and the square steel pipe column, and the edge of the notch is The point is that it is fillet welded to the side wall portion of the square steel pipe column .

According to this configuration, the square steel pipe column and the left and right steel beams can be easily and Can be firmly bonded.

In other words, a square steel pipe column is normally provided with a diaphragm to join the flanges of the beams, but by extending that diaphragm to one side of the front and back, it is easy to easily connect the flanges of the left and right H-shaped steel beams. It can be constructed as a highly rigid part.
Furthermore, the left and right reinforcing side plates are installed between the overhanging parts of the upper and lower diaphragms to which the web of the H-shaped steel beam is connected, and the column-side parts on the other front and back sides are attached to the left and right side walls of the square steel pipe column, respectively. By fillet welding the peripheral edge of the column side part to the side wall of the square steel pipe column in an overlapping state, we effectively utilize the shape of the square steel pipe column with left and right side walls to ensure a long weld length. Moreover, by overlapping them, it is possible to increase the resistance against moment loads.

Therefore, in a column-beam joint structure in which left and right H-shaped steel beams extending in the left-right direction eccentrically on one side of the front and rear are joined to the square steel pipe column to a position where their axes do not intersect with the square steel pipe column in plan view, Steel pipe columns and left and right steel beams can be easily and firmly connected.

Furthermore, according to this configuration, the notch provided on the diaphragm side side (upper side and lower side) of the column side portion of the reinforcing side plate allows the welding of the column side portion of the reinforcing side plate to the rectangular steel pipe column to be easily connected to the diaphragm. Fillet welding can be performed directly to the side wall of the square steel pipe column, avoiding the joint with the square steel pipe column.

A second characteristic configuration of the present invention is that a vertical connecting plate extending between the left and right reinforcing side plates is provided at a position on an extension line of the web of the H-shaped steel beam.

According to this configuration, the connecting plate in a vertical position is provided at a position on the extension line of the web of the H-shaped steel beam between the left and right reinforcing side plates, so that the connection between the webs of the left and right H-shaped steel beam is achieved with a simple structure. This allows stress to be transmitted well and an even better column-beam joint structure can be realized.
A third characteristic configuration of the present invention is that the left and right reinforcing side plates are welded to the square steel pipe column at a welding portion also at a corner formed between the reinforcing side plate and the eccentric side wall part of the square steel pipe column. It is at the point where it is done.
A fourth characteristic configuration of the present invention is that an opening is provided in the column side portions of the left and right reinforcing side plates, and the peripheral edge of the opening is also welded to the left and right side walls of the square steel pipe column at a welding portion. The point is that

Right side view of column-beam joint structure Sectional view taken along line II-II in Figure 1 Cross-sectional view showing a modified example of column-beam joint structure Cross-sectional view showing a modified example of column-beam joint structure

Embodiments of the column-beam joint structure of the present invention will be described based on the drawings.
This column-beam joint structure is suitable for use in steel-framed buildings, etc., and as shown in Figures 1 and 2, it extends in the front-rear direction to a position where the axis A does not intersect with the square steel pipe column 1 in plan view. Left and right H-shaped steel beams 2 extending in the left-right direction be done. In the illustrated example, the left and right H-shaped steel beams 2 are eccentrically eccentric to a position where they do not intersect with the rectangular steel pipe column 1 in their entirety or substantially in their entirety in plan view.
For example, the eccentric side that makes the H-shaped steel beam 2 eccentric can be set on the outer periphery of the building, and in this way, the panel support bracket for fixing the exterior panel to the H-shaped steel beam 2 on the outer periphery of the building can be set. It is possible to easily shorten the length. Note that, on the contrary, the eccentric side on which the H-shaped steel beam 2 is eccentric may be set to the center side of the building.

As shown in FIGS. 1 and 2, each H-shaped steel beam 2 includes a pair of upper and lower flanges 2A and a web 2B that connects the flanges 2A. The square steel pipe column 1 is composed of a ready-made steel pipe that has been previously formed into a square cylinder shape in a factory or the like.

The beam joint portion (core portion) 10 of the square steel pipe column 1 is provided with upper and lower diaphragms 11 to which the upper and lower flanges 2A of the H-shaped steel beam 2 are joined. Each diaphragm 11 is constituted by a substantially horizontal flat plate member made of a steel plate having a thickness greater than that of the flange 2A of the H-shaped steel beam 2 and the peripheral wall portion 1A of the square steel pipe column 1. Each diaphragm 11 can suitably adopt a through diaphragm that is installed across the inside and outside of the square steel pipe column 1, and the square steel pipe with its peripheral edge protruding from the peripheral wall 1A of the square steel pipe column 1 as a protruding part. It is joined to the column 1 by welding or the like.

In this column-beam joint structure, the upper and lower flanges 2A of the left and right H-shaped steel beams 2 are joined to the upper and lower diaphragms 11 by extending toward the eccentric side of the H-shaped steel beams 2 along the front-rear direction Y. An overhanging portion 11A is provided. The overhanging width of the upper and lower overhanging portions 11A is set to be equal to or greater than the beam width of the H-shaped steel beam 2. Then, the upper and lower flanges 2A of the left and right H-shaped steel beams 2 are welded to the left and right end surfaces of the upper and lower overhanging portions 11A in a butted state.

Furthermore, left and right reinforcing side plates 12 to which the webs 2B of the left and right H-shaped steel beams 2 are joined are provided between the projecting portions 11A of the upper and lower diaphragms 11. The left and right reinforcing side plates 12 are configured, for example, by substantially vertical flat plate members made of steel plate and having the same plate thickness as the peripheral wall portion 1A of the square steel pipe column 1. Webs 2B of left and right H-shaped steel beams 2 are joined to the left and right reinforcing side plates 12, extending eccentrically from the eccentric side (front side) side wall portion 1a of the peripheral wall portion 1A of the square steel pipe column 1. A beam side portion 12A that extends from the side wall portion 1a to the opposite side (rear side) from the eccentric side and is joined to the left and right side wall portions 1b of the peripheral wall portion 1A of the square steel pipe column 1. Be prepared.

The left and right reinforcing side plates 12 have their column side portions 12B overlaid on the left and right side walls 1b of the square steel pipe column 1, respectively, and have an upper edge 12a as a peripheral edge of the column side portion 12B, and a lower side. The edge portion 12b and the rear edge portion 12c are fillet welded to the left and right side wall portions 1b of the square steel pipe column 1 at the welding portion W1, respectively, and are joined to the square steel pipe column 1.
In addition to the welded portion W1, the left and right reinforcing side plates 12 have corners formed between the reinforcing side plates 12 and the eccentric side (front side) side wall portion 1a of the square steel pipe column 1, as shown in FIG. However, by welding at the welding portion W2, it is possible to join the square steel pipe column 1 more firmly. In addition, as shown in FIG. 4, slits 12e (an example of an opening) are provided in the column side parts 12B of the left and right reinforcing side plates 12, and the peripheral edges of the slits 12e are also formed in the left and right side walls 1b of the square steel pipe column 1, respectively. By welding at the welding portion W3, it is possible to join the square steel pipe column 1 more firmly.

Here, the upper and lower sides of the column side portion 12B of the reinforcing side plate 12 on the upper and lower diaphragm 11 sides are recessed away from the protruding portions of the adjacent upper and lower diaphragms 11 to connect the diaphragm 11 and the square steel pipe column 1. A notch 12d is provided to avoid welding to the section, and the edges of the upper and lower notches 12d serve as the upper edge 12a and lower edge 12b of the column side section 12B on the left and right sides of the square steel pipe column 1. It is fillet welded to the side wall portion 1b at the welding portion W1. Therefore, the notch width dimension (vertical width dimension in the figure) of the notch 12d is set to be greater than or equal to the welding width of the welding portion W1.

Incidentally, in the illustrated example, the edge on the eccentric side (front side) of the upper edge 12a of the column-side portion 12B of the reinforcing side plate 12 is formed into a tapered arc-shaped edge that is positioned higher toward the eccentric side. Furthermore, the eccentric side end edge of the lower edge 12b of the column side portion 12B is configured to be a tapered arcuate edge located lower toward the eccentric side.
Note that the column side portion 12B of the reinforcing side plate 12 can be set according to the required welding length of the welded portion W1, etc., and for example, the width dimension in the front-rear direction Y is the same as that of the left and right side wall portions 1b of the square steel pipe column 1. It is configured to be approximately half the width dimension.

The beam side portions 12A of the left and right reinforcing side plates 12 have, for example, a width dimension in the front-rear direction Y (protrusion width dimension) that is slightly smaller than an overhang width of the overhang portions 11A of the upper and lower diaphragms 11, and a width dimension in the vertical direction. are configured to have the same distance between the upper and lower diaphragms 11, and the upper and lower edges are joined to the upper and lower diaphragms 11 by welding or the like.

Further, in this beam-column joint structure, a vertical connecting plate 13 (see FIG. 2) is provided between the beam-side portions 12A of the left and right reinforcing side plates 12. The connecting plate 13 in the vertical position is, for example, a substantially vertical flat plate member made of a steel plate having the same thickness as the web 2B of the H-shaped steel beam 2, and is H-shaped in plan view as shown in FIG. It is provided at a position on the extension line of the web 2B of the steel beam 2 (in other words, on the extension line of the axis A of the H-shaped steel beam 2 in plan view). The left and right side edges of the connecting plate 13 are joined to the beam side parts 12A of the left and right reinforcing side plates 12 by welding or the like, and the upper and lower side edges (not shown) are welded or the like to the upper and lower diaphragms 11 as necessary. It is joined with.
In addition, as shown by the imaginary line (dotted chain line) in FIG. 1, by installing a vertical stiffener 14 in the intermediate area between the left and right reinforcing side plates 12, the shear force of the H-shaped steel beam 2 is transferred to the rectangular steel pipe column. 1 can be transmitted more smoothly.

[Another embodiment]
Other embodiments of the present invention will be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

(1) In the above-described embodiment, the case where only the left and right H-shaped steel beams 2 extending in the left-right direction H-shaped structural beams etc. may be joined.

(2) The notch 12d of the column side portion 12B in the left and right reinforcing side plates 12 and the vertically positioned connecting plate 13 spanning the left and right reinforcing side plates 12 described in the above embodiment may be omitted in some cases. . For example, if the upper and lower diaphragms 11 are inner diaphragms that do not have a protruding part that protrudes from the peripheral wall 1A of the square steel pipe column 1, the column side portion 12B of the reinforcing side plate 12 does not need to be formed with the cutout 12d. The peripheral edge portion can be properly joined to the square steel pipe column 1 by fillet welding directly to the side wall portion 1b.

1 Square steel pipe column 1b Left and right side walls 2 H-shaped steel beam 2A Flange 2B Web 11 Diaphragm 11A Overhanging part 12 Reinforcement side plate 12B Column side part 12d Notch 13 Connection plate

Claims (4)

A column-beam joint structure in which left and right H-shaped steel beams extending in the left-right direction and eccentric to one side of the front and back to a position where the axes do not intersect with the square steel pipe column in plan view are joined to the square steel pipe column,
The upper and lower diaphragms provided on the square steel pipe column are provided with overhanging parts that overhang on one side of the front and back to which the upper and lower flanges of the left and right H-shaped steel beams are joined,
Between the overhanging parts of the upper and lower diaphragms, left and right reinforcing side plates in a vertical position to which the webs of the left and right H-shaped steel beams are joined are provided,
With the left and right reinforcing side plates overlapping the column side portions on the other front and rear sides on the left and right side walls of the square steel pipe column, respectively, the peripheral edge portions of the column side portions are placed on the side wall portion of the square steel pipe column. It is joined to the square steel pipe column by fillet welding ,
A notch is provided on the diaphragm side side of the column side portion of the reinforcing side plate to avoid welding to the joint between the adjacent diaphragm and the square steel pipe column, and the edge of the notch is A column-beam joint structure in which fillet welding is performed to the side wall portion of the square steel pipe column . 2. The column-beam joint structure according to claim 1 , wherein a vertical connecting plate extending between the left and right reinforcing side plates is provided at a position on an extension line of the web of the H-shaped steel beam. 3. The left and right reinforcing side plates are welded to the square steel pipe column at welded portions also at corners formed between the reinforcement side plates and the eccentric side wall portion of the square steel pipe column. Column beam joint structure. The column according to claim 1 or 2, wherein an opening is provided in the column-side portion of the left and right reinforcing side plates, and the peripheral edge of the opening is also welded to the left and right side walls of the square steel pipe column at a welding part, respectively. Liang joint structure.