JPH06240757A - Structure of column/beam connection part - Google Patents

Abstract

PURPOSE:To enhance the assembling workability of the connection part of a steel frame column in the inside of which concrete is filled and steel frame beams. CONSTITUTION:A steel frame column 2 of a closed sectional shape in the inside of which concrete 1 is filled, and steel frame beams 3 are arranged so as to be perpendicular to each other in the inside of the steel frame column 2, and they are joined by using a connection member 4 consisting of flat plate parts 41, 41 to be connected to the flanges 31 of the steel frame beams 3 on both sides by means of bolts, and a connection part 43 for connecting both the flat plate parts 41, 41 in the inside of the column 2. The connection member 4 is arranged so as to penetrate the opposite flanges 21, 21 of the steel frame column 2, and the transmission of stresses between the steel frame beams 3, 3, and to the concrete 1 is carried out by the connection part 43. Thereby, the working manhours and welding quantity to the steel frame column 2 can be reduced, and the assembling workability can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-beam joint structure composed of a steel frame column having a closed cross section and a steel frame beam filled with concrete.

[0002]

2. Description of the Related Art At a joint between a steel frame column and a steel beam having a closed cross-sectional shape such as a rectangular steel pipe or a circular steel pipe, a stress is transmitted and a rigidity of a flange of the steel frame against the stress is ensured at the joint. A diaphragm is placed at the level of the steel beam flange.

[0003] Mainly, the through-diaphragm method for joining to the end faces of the steel-columns cut at the upper and lower flange positions of the steel beam, the inner diaphragm method for inserting inside the steel-column, and the outer diaphragm projecting on the outer periphery are arranged. Although there is a method, most of the work required to configure the joint depends on welding, and since there are many cuttings and processing, assembly requires labor and high accuracy, so it is not suitable for assembly work in factories. There are difficulties. In particular, the inner diaphragm method has a problem in that it cannot be touched after the steel frame column is assembled, and the outer diaphragm method has problems such as poor compatibility with the finish.

In addition, instead of the diaphragm, there is a system in which long bolts are passed between the opposing flanges of the steel column and between the adjacent flanges to perform the function of the diaphragm. Since it is completed with the axial force applied to the long bolt, the flange of the steel column with poor rigidity may be deformed as the axial force is introduced.To prevent deformation, the final nut tightening work must be performed. Since it has to wait until the concrete hardens, the progress of construction will be affected.

The present invention has been made in view of the actual situation of the above-mentioned conventional structure, and it is an object of the present invention to newly propose a structure which does not require cutting of a steel frame column and has good assembling workability.

[0006]

According to the present invention, 1 are arranged in a steel frame column so as to be orthogonal to each other and face each other across the steel column.
The number of processings and the amount of welding to the steel column are performed by connecting the steel beam to the steel column using the joints that connect the steel beams in the same direction to each other and transmitting the tensile force between the steel beams and the compressive force to the concrete by the joint. To improve assembly workability.

The joint hardware is composed of a flat plate portion on both sides which overlaps the flanges of the steel frame beam and is bolted to this, and a connecting portion which connects both flat plate portions within the steel frame column. The parts straddle the connecting parts of the metal joints in the orthogonal directions, and the flat plate parts of the metal joints in the two directions are located at the same level, and the orthogonal steel frame beams are connected to the steel column at the same level.

In the joint metal, the tensile force between the steel beams is connected to the other side by the connecting portion, and the connecting portion is embedded in the concrete in the steel frame column to compress the compressive force from the steel beam by the adhesive force around the connecting portion. Transfer to concrete inside. In addition, the shear force between the opposing steel beams, which acts on the joint due to the part of the flat plate being located inside the steel column, is connected to each steel beam, and from the upper and lower flat plate portions that diagonally oppose each other in the longitudinal section. It is transmitted to concrete by bearing pressure.

The joint metal is arranged so as to penetrate through the opposing flanges of the steel column, and a hole through which the joint metal can be inserted is opened in the steel column, so that the steel column need not be cut. In addition, the joint hardware is inserted into the steel column and embedded in the concrete, and the tensile force is applied to the steel beam side facing the steel beam column so that the compressive force is applied to the concrete.
The number of processes and welding required for processing and stiffening of the joint metal object and the amount of welding are reduced or eliminated, and the workability of assembling the joint is improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment.

As shown in FIGS. 1 and 2, according to the present invention, a steel frame column 2 having a closed cross-section, such as a rectangular steel pipe or a circular steel pipe into which concrete 1 is filled, and a steel beam 3 having an H-shaped cross section are provided. Which are joined together by using the metal fittings 4 and 4 which are arranged orthogonally in the interior of 2 to transmit the stress from the steel beam 3 to the steel beam 3 on the other side and the concrete 1 in the steel column 2 by the metal fitting 4 Is.

The joint hardware 4 is a flange of the steel beam 3 on both sides.
Flat plate parts 41, 41 that overlap 31 and are joined to them with bolts 5
And the flat plate portions 41, 41 are connected to each other inside the steel frame column 2 and are arranged orthogonally to each other inside the steel frame column 2.
The flat plate portion 41 has a width corresponding to the width of the flange 31 of the steel beam 3, and a plurality of bolt holes 42 for bolt connection are formed in the flat plate portion 41. The cross-sectional shape of the connecting portion 43 may be rod-shaped in addition to the plate-shaped shown in the drawing.

The connecting portion 43 of the joint metal 4 in any one direction orthogonal to the level of each flange 31 of the steel beam 3 is bent as shown in FIG. 2 or the connecting portion 43 is shown as shown in FIG. The center is eccentric with respect to the flat plate portion 41, and one of the metal joints 4 is installed across the connecting portion 43 of the metal joints 4 in the orthogonal direction.
The flat plate portions 41, 41 of the directional jointing hardware 4, 4 are joined to the flanges 31, 31 of the steel beam 3, 3 at the same level.

As shown in FIGS. 3 and 6, each metal fitting 4 is inserted through the opposing flanges 21, 21 from the slit 22 formed in the flange 21 of the steel frame column 2 into which the flat plate portion 41 can be inserted. , Is installed in a state of being supported by the flange 21, and partially welded to the flange 21 so that it is held until the concrete 1 is filled. 3 shows the case where the slit 22 is opened horizontally and the joining metal piece 4 is inserted in one direction and installed as it is. FIG.
It is an example in the case of installing by inserting and rotating. In this case, as shown in FIG. 7, one of the joining metal pieces 4 and 4 arranged in parallel in one direction is rotated and installed, and then the other joining metal piece 4 is inserted.

In the case of the embodiment shown in FIG. 3 in which the connecting portion 43 is bent, the slit 22 on the side into which the joining metal piece 4 is inserted is opened in consideration of the height of the connecting piece 43, and each slit 22 is formed in the joining metal piece 4. After the installation, as shown in FIG. 2, the concrete 1 is closed by a closing plate 6 which prevents the concrete 1 from flowing out. Similarly, in the case of the embodiment shown in FIG. 6, the slit 22 is closed by the reinforcing plate 8 as shown in FIG.

The steel frame beam 3 is installed with the upper and lower flanges 31, 31 being sandwiched between the flat plate portions 41, 41 of the upper and lower metal fittings 4, 4, and is joined thereto by bolts 5. The web 32 is joined to a gusset plate 7 that projects from the flange 21 of the steel column 2 and that transmits a shearing force to the steel column 2.

In the embodiment shown in FIGS. 1 and 2, the connecting portion 43 of the flat plate portion 41 is used.
Although the case where a part of the side is located inside the steel column 2 is shown, in this embodiment, since the flat plate portion 41 is embedded in the concrete 1, the upper flange 31 of one steel beam 3 is
Plate portion 41 connected to and the lower flange of the other steel frame beam 3
The flat plate portions 41 connected to 31 form a pair, and the shearing force between the opposing steel frame beams 3 and 3, which acts on the joint portion when a horizontal force is applied, is transmitted to the concrete 1 as a bearing pressure from the portion located inside the steel frame column 2. To do. The tensile force from one steel beam 3 is applied to the connecting portion 43.
After that, the compressive force is transmitted to the concrete beam 1 in the steel column 2 by the adhesive force around the connecting portion 43 to the steel beam 3 on the other side.

[0018]

As described above, the present invention is as described above, and a joint which penetrates between flanges of a steel frame column and is arranged orthogonally to each other in the inside thereof, and connects the steel beams in one direction facing each other with the steel frame column interposed therebetween. Since the steel beam is connected to the steel column using a metal object, and the tensile force between the steel beams and the compressive force to concrete are transmitted by the metal object, processing and stiffening with the placement of the metal object to the steel column It is possible to reduce the number of processes and the amount of welding required for the process, or to eliminate the need for welding, and improve the workability of assembling the joint.

Further, since the connecting portions of the jointed metal articles in any one direction straddle the jointed portions of the jointed metal articles which are orthogonal to each other, the flat plate portions of the jointed metal articles of two directions are located at the same level, so that the orthogonal steel beam is at the same level. Can be joined to steel columns.

In addition, when a part of the flat plate portion is located inside the steel frame column, the shearing force between the opposing steel frame beams acting on the joint portion when the horizontal force is applied can be transmitted to the concrete.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of FIG.

FIG. 3 is a perspective view showing a state in which a metal joint is inserted.

FIG. 4 is a plan view showing another embodiment.

5 is a vertical cross-sectional view of FIG.

FIG. 6 is a perspective view showing a state of inserting a metal joint.

FIG. 7 is a perspective view showing the next step of FIG.

[Explanation of symbols]

1 ... Concrete, 2 ... Steel column, 21 ... Flange,
22 …… slit, 3 …… steel beam, 31 …… flange, 32…
… Web, 4 …… Joining hardware, 41… Flat plate part, 42… Bolt hole, 43… Connection part, 5… Bolt, 6… Blocking plate, 7
...... Gusset plate, 8 ...... Reinforcement plate.

Claims (2)

[Claims] 1. A steel column and a steel beam having a closed cross-section, which are filled with concrete, are arranged orthogonally to each other inside the steel column, overlap with flanges of the steel beam on both sides, and are bolted to this. It is a joint structure that is joined by using a joint metal piece that consists of a flat plate part and a connecting part that connects both flat plate parts in the steel frame column. The column-beam joint structure, wherein the joints of the jointed metal articles in one direction straddle the joints of the jointed metal articles that intersect at right angles, and the flat plate portions of the jointed metal articles in two directions are located at the same level. 2. The column-beam joint structure according to claim 1, wherein a part of the flat plate portion is located inside the steel frame column.