JPH0730586B2 - Steel Ramen Structural Columns and Beam Joint Hardware - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a metal fitting for a column and a beam used in a steel frame structure, and is particularly lightweight and has improved joint efficiency. It is related to the joining hardware.

[Conventional technology]

Conventionally, when constructing a structure with a steel frame structure, it is common to employ a method of joining H-shaped steel and other shaped steels at the construction site through high-strength bolting means. In this case, it is necessary to provide a beam to be connected to the beam in advance, the transportation efficiency is low, and it is necessary to provide a groove to the beam to be welded to the beam. However, there were various problems in terms of accuracy of structures and promotion of labor saving. In order to improve these points, a method of joining a column and a beam with a joint metal is disclosed.

FIG. 6 is an explanatory diagram showing an example of the above method, for example, H
The metal fitting 2 is fixed to the flange 1a of the column 1 made of shaped steel at a predetermined position via the bolt 3, and then the beam 4 made of, for example, H-shaped steel is assembled, and then the flange 4a of the beam 4 is fixed by the bolt 5. It is fastened and fixed to the metal joint 2.

FIG. 7 is an enlarged side view of the metal fitting 2 used in the above-mentioned joining method, in which the flange portion 21 that is in close contact with the pillar 1 and the protrusion portion 22 that is joined to the end portion of the beam 4 are orthogonal to each other and integrally formed. It is formed. Reference numerals 23 and 24 denote bolt holes, and a plurality of bolt holes are provided on the flange portion 21 and the protruding portion 22.

[Problems to be solved by the invention]

According to the joining method using the above-described joining metal, since the amount of welding is small, the reliability of the structure is improved, the joint efficiency is improved, the earthquake resistance of the structure is improved, and the labor saving of work is possible. It is said to have advantages. However, in the case of using the above-mentioned joining hardware, for example, when the flange 1a of the column 1 made of H-shaped steel or the wall thickness of the web is small, the flange of the column 1 when assembled as shown in FIG.
The bending stress of 1a may be insufficient and it may be deformed. FIG. 3 is an enlarged cross-sectional view of an essential part showing the above state, and the same portions are designated by the same reference numerals as those in FIGS. 6 and 7. In FIG. 3, the joint metal 2 and the pillar 1 are each a flange portion 21.
And, they are closely joined by the bolt 3 via the flange 1a. In this state, the beam 4 shown in FIG. 6 causes the welded metal piece 2 to receive a tensile load in the direction of the arrow in FIG. 3, so that the bending stress is large when the wall thickness of the flange 1a of the column 1 is small. As a result, there is a problem that the outer surface of the flange 1a is deformed into a concave shape.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, to prevent the flange of a column from being deformed, and to provide a column / beam joint metal for a steel frame structure capable of sufficiently securing the proof stress of the structure.

[Means for solving problems]

In order to solve the above-mentioned problems, in the present invention, in a metal article for joining a column and a beam of a steel frame structure, a column portion and a flange portion which are tightly joined via a fastening member,
The technical means is adopted, in which the end portion of the beam is provided with a projecting portion that is joined via fastening means or welding means, and a rib is provided at the end portion of the flange portion in parallel with the projecting portion. .

[Action]

With the above structure, the out-of-plane bending resistance on the side of the column flange can be improved and the proof stress of the joint can be improved even if the thickness of the column flange to be closely joined to the metal joint is small.

〔Example〕

FIGS. 1 (a), (b) and (c) are perspective views of essential parts showing an embodiment of the present invention, respectively, and the same parts are shown in FIG. 3 and FIG.
It is designated by the same reference numeral as in FIGS. First, as shown in FIG. 1 (a), a rib 28 is integrally projectingly provided at the end of the flange portion 21 in parallel with the projecting portion 22. The rib 28 has a rectangular projected shape on a plane parallel to the protrusion 22.

With the above configuration, the section modulus in the horizontal plane of the end portion of the flange portion 21 can be significantly improved.
As shown in the figure, the flange 1a of the column 1 is closely joined via the bolt 3 to reinforce the flange 1a and prevent deformation.

In the structure shown in FIG. 1 (b), the bending strength of the flange portion 21 in the longitudinal direction is improved by maximizing the wall thickness of the flange portion 21 at the intersection with the projecting portion 22 and gradually decreasing toward both ends. It was made. The rib 28 projecting from the end of the flange portion 21 is formed by forming a part of the contour of the projection on a plane parallel to the protrusion 22, and the reinforcing action of the rib 28 is shown in FIG. ) Is the same as that shown in.

Next, as shown in FIG. 1 (c), the flange portion 21 and the protruding portion are
A through hollow portion 25 is provided in a portion orthogonal to 22. Thus, as shown in FIG. 1C, the cross section of the through hollow portion 25 is formed in a triangular shape having the flange portion 21 side as the base and the protruding portion 22 side as the apex.

With the above configuration, the component portion 2 that surrounds the through hollow portion 25
6 and 27 form a triangular truss and can transmit the stress applied to the joint metal 2, so compared with the conventional joint having a T-shaped cross section as shown in FIG. The joint efficiency can be made extremely high when a tensile force due to a bending stress is applied. Further, if the joint efficiency is the same, the thickness of each component can be reduced, so that the weight of the entire joint metal can be reduced. The rib 28 to be provided at the end of the flange portion 21 is the same as that shown in FIG. 1 (b).
Is the same as that shown in FIG.

FIG. 4 is a perspective view showing another embodiment of the present invention.
This is an example of the case where the welding with the beam 4 is used as shown in the figure. That is, the protrusion 22 shown in FIGS. 1 (a), (b), and (c) is formed small, and the groove 29 and the rib are formed.
30 is provided. The other structure is the same as that of the above-mentioned embodiment, and the operation is also the same.

In this embodiment, the shape of the rib with respect to the plane parallel to the protrusion is rectangular and the contour is partly curved, but the operation is the same with other geometric shapes. is there. It should be noted that, in the case where the through hollow portion is provided, the cross sectional shape of the through hollow portion is shown as a substantially triangular shape.
The operation is the same even if the cross-sectional shape is circular or elliptical. Further, even if the column and the beam are shaped steels other than the H-shaped steel, the joining metal article of the present invention can be applied.

〔The invention's effect〕

Since the present invention has the configuration and operation as described above,
Even when the wall thickness of the column flange to be closely joined to the flange portion of the metal joint is small, it is possible to prevent out-of-plane bending deformation on the column flange side and improve the yield strength of the joint.

[Brief description of drawings]

FIGS. 1 (a), (b) and (c) are perspective views of a main part showing an embodiment of the present invention, and FIGS. 2 and 3 are deformation states of a column flange in the embodiment of the present invention and a conventional one, respectively. FIG. 4 is an enlarged cross-sectional view of an essential part showing a perspective view, FIG. 4 is a perspective view showing another embodiment of the present invention, and FIGS.
FIG. 7 is an explanatory view showing a state of beam joining, and FIG. 7 is an enlarged side view showing a conventional joining metal article. 21: Flange part, 22: Projection part, 28: Rib.

Front page continuation (72) Inventor Shuei Suzuki Marunouchi 2-1-2 Maruuchi, Chiyoda-ku, Tokyo Nittsu Metal Co., Ltd. (72) Inventor Hidenari Matsuo 1-1-9 Kitahama, Wakamatsu-ku, Kitakyushu, Fukuoka Hitachi Metals Co., Ltd. Wakamatsu Factory

Claims (3)

[Claims] 1. In a metal article for joining a column and a beam of a steel frame structure, a flange part which is closely joined to a column component part through a fastening member, and an end part of the beam is joined through fastening means or welding means. A column / beam joint metal fitting for a steel frame rigid frame structure, wherein a protrusion is provided, and a rib is provided at an end of the flange portion in parallel with the protrusion. 2. The column / beam joint metal fixture for steel frame rigid frame structure according to claim 1, wherein the projection of the rib on a plane parallel to the protrusion is rectangular. 3. The column-beam joint metal fitting for steel frame rigid frame structure according to claim 1, wherein a part of the projected contour of the rib with respect to a plane parallel to the protruding portion is a curve.