JPH0893053A - Joint structure of steel column and steel beam - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a column-beam joint structure capable of easily joining a steel column and a steel beam without using a metal object for reinforcing the joint. [Structure] A structure in which a steel frame column 1 and a steel frame beam 2 are bolted to each other via a metal joint 3 and a pair of bolt joints provided at both ends of the metal joint 3 in the width direction are the steel frame column 1
It is provided in an eight shape so that the mutual distance between the sides becomes wide, and the bolt connection is one side bolt connection,
This is a joint structure between a steel column and a steel beam.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam-column joint structure in which a pillar of a structure such as a building structure, a civil engineering structure, or an offshore structure is a steel frame pillar, and the beam is a steel frame beam.

[0002]

2. Description of the Related Art Conventionally, when a general steel frame column and a steel beam are joined, as shown in FIGS. 7 and 8, a square steel frame column 11 and a steel beam 12 are vertically joined. However, since the surface of the steel column 11 is easily deformed, the diaphragm 15 is mounted inside the steel column 11 for reinforcement. When mounting the diaphragm 15, a very time-consuming process such as cutting and processing of a steel plate, insertion into the steel frame column 11 and welding and joining work is required. In order to solve the above-mentioned problem, in Japanese Unexamined Patent Publication No. 5-179702, as shown in FIG. 9, a joint box 1 is provided at a joint between a column 11 and a beam 12.
6 has been proposed to simplify the method of joining the steel column 11 and the steel beam 12. However, even with this method, it is troublesome to process the joint box 16 and to join the column 11 and the joint box 16, and it is still necessary to improve the work. Further, in JP-A-5-86645, as shown in FIG. 10, a method of applying a reinforcing plate 17 to the joint between the column 11 and the beam 12 to simplify the method for joining the steel column 11 and the steel beam 12. Is proposed. However, in this method as well, the reinforcing plate 17 has to be inserted into the narrow steel-framed column 1 and a laborious work is required. Further, in Japanese Patent Laid-Open No. 1-239240, as shown in FIG.
The joining method of the steel frame column 11 and the steel beam 12 is simplified by applying the column end metal plate 18 and the reinforcing filler 19 to the joint portion of 1 and the beam 12. However, since many metal parts are used for joining, complicated work is required.

[0003]

As described above, in the prior art, when joining the steel column and the steel beam,
Manufacturing metal fittings to reinforce the joint and mounting it requires a great deal of labor and time such as cutting, processing, welding, and assembling steel plates, and has the drawback of being extremely costly. It was An object of the present invention is to provide a beam-column joining structure for joining a steel column and a steel beam, which solves the above conventional problems, and is a column beam of a steel column and a steel beam. The stress transmission mechanism between the pillars and beams in the joint is made extremely efficient, and the reinforcing metal is omitted so that the work efficiency and the assembly cost can be reduced.

[0004]

In order to achieve the above-mentioned object, the present invention, when the steel column 1 and the steel beam 2 are bolted via the metal joint 3, the both ends of the metal joint 3 in the width direction are joined. The pair of bolt joints provided in the so that the mutual spacing on the side of the steel frame pillar 1 is wide, and is provided in an eight shape.
The bolt connection is one-side bolt connection. In particular, in the joint metal 3, the effect of the present invention can be remarkably obtained by widening the mutual interval between the pair of bolt joints formed in the shape of a figure at an angle of 90 degrees. Further, when the steel column 1 has an octagonal or more polygonal cross section, it is possible to reduce the plasticization of the corner portion.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be specifically described below with reference to the drawings with reference to the drawings. FIG. 1 shows the first of the present invention.
This is an example. The steel frame column 1 is joined by a one side bolt 4 with its outer surface in contact with the bolt joint 3a of the joint metal 3 attached to the end of the steel beam 2. The steel column 1 has an octagonal cross section. In this example, the joint metal 3
Each cross section in the octagon joined with the bolt joint 3a of
It is formed at an angle of 90 degrees with each other. A plurality of holes for joining with the one-side bolts 4 are provided at predetermined intervals on their joining surfaces. Each cross-section except the octagonal cross-section of the bolt joint has a role of allowing the end portion of the steel beam 2 to be easily welded and joined to the joint metal 3.

Holes for joining with the one-side bolts 4 are provided at the bolt joining portions of the joining metal object 3 at predetermined intervals so that the joining positions are the same as the bolt holes of the steel frame pillar 1. . The metal joint 3 can be manufactured by bending the bolt joints at both ends of the steel plate in the width direction or by welding three steel plates.

FIG. 3 and FIG. 4 show a second embodiment of the present invention, in which a square steel frame column 1 and a steel frame beam 2 are attached to the ends of the steel frame beam 2 in a dogleg shape (a pair of bolts). The one-side bolt 4 is used to join the metal parts 3 having an angle of 90 degrees.

FIG. 5 shows the first embodiment of the present invention shown in FIGS. 1 and 2, in which the steel beam 2 and the steel column 1 are joined by a metal fitting 3.
The one side bolt 4 is used to join the parts that are in contact with each other via the. By doing so, the joint can be further strengthened.

Next, the function and effect of the above-described joint structure will be described. FIG. 6 is a vector representation of the force balance when the column and the beam are joined in the example of the present invention shown in FIGS. 3 and 4. When the size in the length direction of the beam is [1], the tensile (compressive) force is the force parallel to the surface of the column [1 / (2√2)] and the force perpendicular to the surface [1 /].
(2√2)]. Therefore, the force acting perpendicular to the surface of the column becomes small, and the deformation of the surface of the column becomes small. Due to this action and effect, a special metal object for reinforcing the conventional joint portion as shown in FIGS. 7 and 8 can be omitted, and the work can be simplified (efficiency) and the cost can be reduced. Further, by applying the one-side bolt joint, the labor and time at the time of construction can be reduced.

In each of the above-mentioned embodiments, the mutual spacing of the bolt joints 3a forming a pair with the joint metal 3 on the side of the steel frame is wide at an angle of 90 degrees, but the invention is not limited to this. Whether the angle is narrower or wider than 90 degrees, the effect of the present invention can be sufficiently secured.

[0011]

The present invention, having the above-mentioned structure, has the following effects. (1) With the joint structure of the present invention, the stress of the steel beam 2 is efficiently decomposed in the direction parallel to the direction perpendicular to the surface of the steel column 1, so that the deformation of the surface of the steel column 1 is reduced. Therefore, it is possible to omit the hardware for reinforcing the beam-column joint. Therefore, it is possible to reduce the labor and time for manufacturing and mounting a metal object for reinforcing the beam-column joint. (2) Further, in the joint structure of the present invention, since the steel frame column 1 and the steel frame beam 2 can be simply joined by the one side bolt 4, the labor and time at the time of construction can be reduced. (3) When a steel frame column (conventional quadrangular column) is manufactured from a steel sheet by cold forming (pressing or roll forming), an unreasonable stress acts on the corners and the steel material locally plasticizes. As a result, the seismic performance of the steel column will be reduced. However, in the joining structure of the present invention, the bending angle during cold forming can be reduced by making the steel column 1 a polygonal cross section of an octagon or more, so that plasticization of the corner portion can be reduced. (4) Furthermore, in the joint structure of the present invention, the steel column 1
Can have a polygonal cross section such as an octagon, and thus the width of the surface of the steel column 1 can be shortened, so that local buckling of the surface of the column hardly occurs.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a first embodiment of the present invention for joining a steel column having an octagonal cross section and a steel beam.

FIG. 2 is a vertical cross-sectional side view showing a state of a first embodiment of the present invention in which a steel frame column having an octagonal cross section and a steel frame beam are joined together.

FIG. 3 is a cross-sectional plan view showing a state of a second embodiment of the present invention for joining a steel column having a quadrangular cross section and a steel beam.

FIG. 4 is a vertical cross-sectional side view showing a state of a second embodiment of the present invention in which a steel frame column having a quadrangular cross section and a steel frame beam are joined together.

FIG. 5 is a cross-sectional view of the second embodiment of the present invention of FIG. 2 with an increased number of bolt joints.

FIG. 6 is a vector diagram of stress acting on a steel column in the joint structure of the present invention.

FIG. 7 is a cross-sectional plan view showing an example of joining a conventional prism and beam.

FIG. 8 is a vertical cross-sectional side view of an example of joining a conventional prism and a beam.

FIG. 9 is a perspective view of another example of joining a conventional prism and beam.

FIG. 10 is a cross-sectional plan view of another example of joining a conventional prism and beam.

FIG. 11 is a cross-sectional plan view of another example of joining a conventional prism and beam.

[Explanation of symbols]

 1 Steel Column 2 Steel Beam 3 Joined Hardware 3a Joined Hardware 4 One Side Bolt

Claims (3)

[Claims] 1. A structure in which a steel column 1 and a steel beam 2 are bolt-joined via a metal joint 3, and a pair of bolt joints 3a provided at both ends in the width direction of the metal joint 3 are provided. A joint structure between a steel frame column and a steel frame beam, which is provided in an eight shape so that the mutual spacing on the side of the steel frame column 1 becomes wide, and the bolt connection is a one-side bolt connection. 2. The steel column and the steel beam according to claim 1, wherein a mutual interval between a pair of eight-shaped bolt joints provided at both ends of the joint metal 3 in the width direction widens at an angle of 90 degrees. Joint structure with. 3. The joint structure of a steel frame pillar and a steel beam according to claim 1, wherein the steel frame pillar 1 has a polygonal cross section of octagon or more.