JPH0326808Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a steel column beam joint in a steel reinforced concrete structure.

Conventional technology Conventionally, in steel column reinforced concrete structures, the flange of the bracket is generally thicker than the flange of the steel column.
As shown in FIG. 16, a cruciform steel column 5 with a cross section or a cruciform steel column 10 with a flange 9 as shown in FIGS.
The brackets 1e, 1f, 1g, and 1h are welded with the brackets f, 1g, and 1h cut vertically. As shown in Fig. 11, if the height of the web 4e of the bracket 1e that gathers at the joint (the cross mark on the web 4e in the figure indicates that the members are continuous and integrated) is the same, the comparison is made. It has a simple structure, and two of the six upper and lower flanges 2e and 3e have different shapes from the others, and the six webs 4e need three different shapes, but they have different span distances. , when changing the floor level,
Because the heights of the webs of the brackets that gather at the joint were different, the structure was complicated as shown in Figures 13 to 18.

That is, in FIGS. 13 and 14, brackets 1f with different heights of webs 4f are welded to a steel column 8 with a T-shaped cross section in a T-shape, and the left and right brackets 1f have a longer span on the right side. The height of the right web 4f is higher than the height of the left web 4f, and the five upper and lower flanges 2
The shapes of three of the webs f and 3f are different, and the shapes of the five webs 4f are also all different. In Fig. 15 and Fig. 16, a steel column 5 having a cross-shaped cross section is shown.
Brackets 1g with different heights of webs 4g are welded together in a cross shape.Since the left and right floor levels are different, the brackets 1g are attached to the steel column 5 with the heights shifted on the left and right, and 8 Four of the upper and lower flanges 2g and 3g each have the same shape, and five of the ten webs 4g have different shapes. In addition, FIGS. 17 and 18 show a cross-shaped steel column 10 with a cross-sectional flange 9.
Brackets 1h with different heights of webs 4h similar to those shown in Fig. 3 are welded in a cross shape, and the upper flange 2
h has three pieces, two of which have the same shape and the other one has a different shape, and the shape of the lower flange 3h is the same on each two pieces,
There are seven webs 4h, five of which have different shapes, and four stiffeners 11 provided at positions corresponding to the flanges 9 of the steel column 10, and two sets of the same shape are required.

In addition, as shown in FIG.
Four members 19 are formed by bending them into an L-shape and forming leg pieces 17 and 18 on the left and right sides outward from the corner 16.The angle-shaped connecting fittings 21 are applied to the two sets of webs 20 by aligning the corners 16. A steel frame structure is known in which the frame is connected in a cross shape by tightening 22 bolts (see Japanese Utility Model Publication No. 45-9788).

Problems to be Solved by the Invention In the above-mentioned conventional steel beam joints, span distances and floor levels often vary. If the position shifts, the number of webs increases, and a wide variety of web and flange shapes are required, and the number of welding locations also increases, complicating design and construction.

In addition, in the framework of conventional steel structures, the webs of the legs of the L-shaped members made of channel steel are doubled, which increases the amount of steel used, requires extra connection fittings, and increases the height of the beam. If the left and right sides are different, the floor level is different, and the joint position of the beam is different, the web height cannot be changed because the legs of four L-shaped members with the same web height are fixed using channel steel. However, there was a problem that it could not be adapted to these requirements.

Means for solving the problem The means of this invention for solving the above problem consists of a single upper flange tapered on the center side and a single upper flange tapered on the center side.
The lower flange of the bracket is welded with a single web so that it has an H-shaped cross section, and three or four of the brackets are perpendicular to each other when viewed from the top and bottom, and each web is It consists of a steel column beam joint formed by welding the side edges of each web while protruding from the tip of the flange.

Example An embodiment of this invention will be described based on the drawings.

In FIGS. 1 and 2, 1 is a bracket (hereinafter referred to as bracket 1).
They are represented by lowercase letters such as 1c and 1d. The same applies to 2, 3, and 4. ) with one upper flange 2a and one lower flange 3
A single web 4a is welded and connected to the web 4a so as to have an H-shaped cross section. The web 4 is arranged so that the four brackets 1a are perpendicular to each other when viewed from above and below.
The side edges of the brackets a are welded and connected, and the center portion of the steel column 5 having a cruciform cross section is welded so as to coincide with the center portion 6a of the bracket 1a to form a steel column beam joint. In this case, the shapes of the eight flanges 2a and 3a are the same, and the shapes of the four webs 4a are also the same. The corners of the upper and lower flanges 2a, 3a of the bracket 1a are rounded on the center 6a side so that they become tapered.
A gap 7 exists between them. Therefore, when concrete is poured, this gap 7
Concrete can be easily filled from below.

Figures 3 and 4 show a steel column 8 with a T-shaped cross section.
Brackets 1b with different heights of webs 4b are welded in a T-shape so that the center of the steel column 8 coincides with the center 6b of the bracket 1b, and the left and right brackets 1b have a longer span on the right side. Therefore, the height of the web 4b is higher than the height of the left web 4b. In this case, the shapes of the six upper and lower flanges 2b, 3b are the same, and the shapes of two of the three webs 4b are the same. In addition, since the cross section of the steel column at the corner of the building is L-shaped, the web side edges of the brackets are also welded into an L-shape.

5 and 6 show a bracket 1 having a web 4c of different height at the center of a steel column 5 having a cross-shaped cross section.
It is welded in a cross shape so that it coincides with the center part 6c of the steel column 5.
In contrast, the bracket 1c is attached with the height shifted from left to right. In this case, the shapes of the eight upper and lower flanges 2c, 3c are the same, and the shapes of the two webs 4c are the same.

Figures 7 and 8 show a cross-shaped steel column 10 with a cross-sectional flange 9 welded in a cross shape so that the center part coincides with the center part 6d of a bracket 1d whose web 4d has a different height. Bracket 1
d has a long right span, so the height of the right web 4d is higher than the height of the left web 4d. In this case, eight upper and lower flanges 2
The shapes of webs d and 3d are the same, and the shapes of two of the four webs 4d are the same.

Four stiffeners 11 having the same shape are welded to positions corresponding to the flanges 9 of the steel column 10. This stiffener 11 can maintain the same strength as a steel column even at the joint part, and the number of stiffeners 11 can be reduced to half of the conventional one.
Only the bracket 1d of this joint portion is shown in FIG.

Figure 10 shows the state in which it is applied to the frame of a building.In the middle joint section of the 3rd to 8th floors, the left span is longer than the right span, so the height of the web 4 is higher than the right. T-shaped brackets 1b are used for the building, the first and second floors use T-shaped brackets 1c with different floor levels, and L-shaped brackets are used for each end of the building, with no space between the brackets. , the beam 12 is at the chain line position 13 at the site.
The ends of the steel columns joined by bolts or welds at 1 and the brackets are joined in the field by bolts or welds at 14 in phantom.

Effects of the invention In this invention, the edges of the web side of the bracket with an H-shaped cross section are welded so that they are orthogonal to each other when viewed from the top and bottom, so the shapes of the flange and web can be made symmetrical with the welded part as the central axis. Therefore, all the flanges can be of the same shape, the number of webs can be minimized to 2 to 4, and it is only necessary to prepare multiple webs of the same shape. Since a large number of parts are not required, the design is easy and the number of required parts is small, so the bracket is easy to manufacture and the unit price can be reduced. In addition, there are far fewer welding points than in the past, so construction is simple and easy, reducing construction costs.Since there is only one web and no connecting fittings are required, fewer materials are used. If the heights of the left and right beams are different because the spans of the beams are different, the height of the webs of the left and right brackets can be adjusted to match the height of the left and right beams, and the floor level on the left and right can be adjusted. If they are different, the welding positions of the webs of the left and right brackets can be changed to match the heights of the left and right beams, thereby making it possible to easily create a shingle that matches the beams.

[Brief explanation of the drawing]

Figures 1 to 10 show an embodiment of this invention, in which Figure 1 is a longitudinal cross-sectional side view taken along the line of Figure 2, Figure 2 is a cross-sectional plan view taken along the line of Figure 1, and Figure 3 is a cross-sectional side view taken along the line of Figure 1. is a vertical cross-sectional side view taken along the lines shown in FIG. 4, FIG. 4 is a cross-sectional plan view taken along the lines shown in FIG. 3, FIG. A plan view, FIG. 7 is a vertical cross-sectional side view along the line of FIG. 8, FIG. 8 is a cross-sectional plan view along the line of FIG. 7, FIG. 9 is a perspective view of the bracket, and FIG. 11 to 19.
The figure shows a conventional example, and Fig. 11 is Fig. 12
- Longitudinal side view along line XI, Figure 12 is Figure 11
A cross-sectional plan view along the line XII-XII, Figure 13 is the 14th
Fig. 14 is a cross-sectional side view along the line Fig. 13, a cross-sectional plan view taken along the line Fig.
5 is a vertical cross-sectional side view taken along the line of FIG. 16, FIG. 16 is a cross-sectional plan view taken along the line of FIG. 15, FIG. 17 is a vertical side view taken along the line of FIG. 18, and FIG.
FIG. 19 is a cross-sectional plan view taken along the line, and a perspective view showing another conventional example. 1...Bracket, 2...Upper flange, 3...
Lower flange, 4...web, 9...flange, 1
0... Steel column, 11... Stiffener.

Claims (1)

[Scope of utility model registration request] One upper flange 2 and one lower flange 3 tapered at the center 6 side are shaped so that they have an H-shaped cross section.
A bracket 1 is formed by welding two webs 4, and each web 4 is welded so that three or four of the brackets 1 are perpendicular to each other when viewed from above and below.
A steel frame column beam joint portion formed by welding the side edges of each web 4 with the edges protruding from the tips of the upper and lower flanges 2 and 3.