JPH0742733B2 - Column-beam joint structure - Google Patents

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 in which a steel beam is joined to a steel frame column having a closed cross-section which is filled with concrete.

[0002]

Prior Art and Problems to be Solved by the Invention
Diaphragms for transmitting stress from the steel beam to the steel column and reinforcing the steel column are placed at the upper and lower flange positions of the steel beam at the joint between the steel column having a closed cross-section and the steel beam.
The basic arrangement method is roughly classified into a type to be put inside the steel column and a type to be projected on the outer periphery of the steel column.

Further, when a steel frame column is particularly filled with concrete to form a steel pipe concrete column, a stiffener is arranged vertically in consideration of the filling property of the concrete, or a band plate is provided on the outer periphery of the steel frame column. There is also a method of circling, but usually one of the above methods is more common than the certainty of stress transmission, and when it is put inside a steel column, an opening is formed in the diaphragm so that the filling property of concrete is not impaired. It is said that

Among these methods, in the method of inserting the diaphragm inside the steel frame column, at least the joint portion is composed of an assembled box-shaped steel pipe. Alternatively, the steel pipe is cut once at the joint position and then reassembled by welding after the diaphragm is placed.In both cases, the assembly depends on welding. The reality is that it takes time and effort.

On the other hand, in the method of projecting on the outer circumference, the diaphragm is divided, resulting in an increase in the number of parts. Therefore, a welding amount of the same extent as in the case of putting it in the inside is required, and again complicated processing and assembly are avoided. I can't.

The present invention was devised in view of the above-mentioned circumstances, and its purpose was made in consideration of the actual condition of the conventional structure when concrete is filled in a steel frame column having such a closed cross section. To propose a new structure that solves the problem.

[0007]

SUMMARY OF THE INVENTION In the present invention, a connecting metal piece that is arranged orthogonally in a steel frame column and connects steel beam beams facing each other with the steel frame column interposed therebetween and a steel frame column that is circumscribed to stiffen the flange. The stress from the steel beam is transmitted to the steel column by the supporting metal to be attached, and by attaching nuts and couplers to these parts and connecting them to the steel beam, welding is performed with the conventional stiffening of the joint. Work is omitted, and the problem of the work of assembling and assembling when arranging the diaphragm and the horizontal stiffener while ensuring the filling property of concrete is solved.

The coupling hardware and the bearing metal are arranged at the upper and lower flange positions of the steel beam in the steel column, and the bearing metal is circumscribed on the steel column to increase the plate thickness of the flange to increase the rigidity and to locally It prevents the deformation of the steel frame and at the same time transmits the tensile force and the compressive force from the steel beam to the concrete as bearing pressure. In particular, the tensile force is transmitted to the side of the concrete on the opposite side through the connecting metal.

A bolt portion with a male screw cut is formed at both ends of the connecting metal piece, and the connecting metal piece to be joined to the end portion of the steel frame beam is connected to the bolt portion via a coupler in a screw joint type or a bolt joint. Connected to the expression.

The coupling hardware is fixed to the bearing metal and to the steel column by screwing a coupler on the side of the bolt portion to which the joining hardware is connected and a nut on the side not connected. As a result, both the fixing of the connecting metal object and the connection with the joining metal object are performed without depending on welding, and the on-site construction is simplified.

[0012] One of the connecting metal pieces which is orthogonal to each other has a length enough to extend between the facing surfaces of the bearing metal piece, and a flat portion having a flat cross-section and a part of a void is formed in an intermediate portion thereof. At the same time, the other connecting metal piece intersects in an orthogonal state by penetrating the gap of the flat portion, so that both bolt portions of the two connecting metal pieces that are orthogonal to each other are positioned at the same level,
(EN) It is possible to connect a steel frame beam, which is connected orthogonally to a steel frame column, with a filler plate or the like without absorbing a step, and to easily lay a floor formwork.

The side to which the steel frame beam is not connected and the bolt portion of the connecting metal item to which the joining metal item is not connected are fixed to the bearing metal item by the nut to ensure the transmission of the tensile force from the steel beam to the steel column.

The joint metal connected to at least one bolt portion of the connecting metal body arranged orthogonally inside the steel column is a flat plate having a plurality of bolt holes for high-strength bolt connection to the flange of the steel frame beam. -Shaped support portion and a flat plate-shaped joint portion having a bolt hole for bolt-joining to the bolt portion of the connecting metal article through a coupler, and formed into a substantially L-shape, and joining the joint metal article to the flange of the steel beam, What is carried out by high-strength bolt joining with the flange of the steel frame beam sandwiched between the flat plate-shaped support portions is used.

In addition, the metal joint which is connected to at least one bolt portion of the connecting metal piece orthogonally arranged inside the steel column and is joined to the flange of the steel frame beam is connected to the bolt portion of the connecting metal piece through a coupler. A flat plate-shaped joint having at least upper and lower bolt holes for bolt-jointing
A substantially cross shape is formed by projecting at the central portion between the upper and lower parts of this flat plate-like joint and having a flat plate-like support having a plurality of bolt holes formed for joining high-strength bolts to the flange of the steel beam. The one formed in the above is used.

Furthermore, a joint metal piece connected to at least one bolt portion of the connecting metal piece arranged orthogonally inside the steel column and joined to the flange of the steel frame beam is connected to the bolt portion of the connecting metal piece through a coupler. A flat plate-shaped joint having at least upper and lower bolt holes for bolt-jointing
The flat plate-shaped joint is projected at the center between the upper and lower parts, and is formed in a substantially cross shape from the butt-welding portion of the flange of the steel beam to the joint end of the steel-beam. An oblique cut portion for performing butt welding with and a backing portion for preventing shrinkage deformation during welding work are used.

[0016] As described above, each joint metal is connected to the coupler screwed to the bolt portion of the joint metal by a bolt joint, and by high-strength bolt joint and welding to the flange of the steel frame beam, the steel column and the steel frame beam are connected. Respectively connected to each other.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The pillar-beam joint structure of the present invention will be described below with reference to the illustrated embodiments.

As shown in FIGS. 1 and 2, the present invention is a steel frame beam 3 having an H-shaped cross section to 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. Is performed by using the connecting metal piece 4 arranged orthogonally inside the steel frame pillar 2 and the connecting metal piece 5 connected to the end of the steel frame beam 3, and the bearing of the flange of the steel frame pillar 2 circumscribing it. At the same time as the metal member 6 is reinforced, the connecting metal member 4 and the bearing metal member 6 transmit the stress from the steel beam 3. Note that the bearing metal 6 here is arranged so as to circulate in a strip shape as shown in FIG. 1 when the steel column 2 has a rectangular cross section, for example.

As shown in FIGS. 1 and 2, bolts 4a are formed on both ends of the connecting metal piece 4, and the connecting metal piece 4 extends between the surfaces of the bearing metal piece 6 circumscribing the opposite flanges of the steel column 2. It has become a length. And one of the connecting hardware 4 which is orthogonal to each other
Has a flat section 7 having a flat cross-sectional shape and a part of which is a void 8a.
By penetrating 7a, the other connecting metal piece 4'intersects in an orthogonal state. In addition, one of the connecting hardware 4 that intersects at right angles
At least one of the bolt portions 4a is connected with a metal joint 5 joined to the flange of the steel beam 3.

The connecting metal piece 4 having the flat portion 7 having the void 7a is used on the side where the flanges of the orthogonal steel frame beams 3, 3 have the same level. Then, for each flange of the steel frame beam 3, for example, two pieces are arranged in parallel in each flange in correspondence with the number of the metal fittings 5 to be joined to the flange.

It should be noted that one of the opposing insertion holes in the steel column 2 through which the connecting hardware 4 penetrates has a flat portion 7 as shown in FIG.
It is open only for the height that allows for the width.

At least the joining hardware 5 in the connecting hardware 4
As shown in FIGS. 1 and 2, a long nut-shaped coupler 8 is connected to the bolt portion 4a on the side to which is connected, and the joint metal 5 is connected to this coupler 8. The bolt portion 4a of the connecting metal piece 4 on the side to which the joining metal piece 5 is not connected is fixed to the bearing metal piece 6 by the nut 9.

As shown in FIGS. 1 and 2, the bearing metal 6 is arranged at the position of the connecting metal 4 and is attached to the outer circumference of the steel column 2 in advance by, for example, fillet welding. Steel column 2
Further, a gusset plate 10 for transmitting the shearing force from the steel beam 3 is provided on the outer periphery of the projecting plate 10.

As described above, the bearing metal 6 is circumscribed and circumscribes the steel frame column 2 in the shape of a band plate when the steel frame column 2 has a rectangular cross section because of its ease of manufacture.

The bolt portion 4a of the connecting metal piece 4 penetrates through the bearing metal piece 6 and projects from the surface thereof, and the coupler 8 abuts on the bearing metal piece 6 while screwing onto the projecting portion, so that the connecting metal piece 4 is secured. It is fixed to the steel column 2.

The bearing metal 6 has a certain width to circumscribe the steel column 2 to stiffen the flange, and at the same time, compressive force from the joint metal 5 connected to the connecting metal 4 is applied to the concrete in the steel column 2. 1 plays a role of transmitting a tensile force directly to 1 as a bearing pressure from the opposite side via the connecting metal piece 4.

By making the bearing metal 6 high in strength, it is possible to prevent the inside of the steel frame column 2 having a closed cross section from being filled with concrete.

Next, the joining metal 5 of FIG. 2 will be described (see FIG. 3). The joining metal 5 connected to at least one bolt portion 4a of the connecting metal 4 arranged orthogonally inside the steel column 2 is a steel beam. 3 has a flat plate-like support portion 11 having a plurality of bolt holes 11a formed for joining high-strength bolts to the flange, and a bolt hole 12a for joining the bolt portion 4a of the connecting metal object 4 through the coupler 8 to each other. And a flat plate-like joint portion 12 having

The joining of the joining metal 5 to the flange of the steel frame beam 3 is performed by high-strength bolt joining with the flat plate supporting portion 11 sandwiching the flange of the steel frame beam 3 from above and below.
The joining of the joining metal piece 5 to the connecting metal piece 4 is performed by bolting the flat plate-shaped joint portion 12 to the coupler 8 screwed to the one bolt portion 4a. In addition, this joining hardware 5 is
As described above, it is arranged only on the side to which the steel frame beam 3 is connected.

The column-beam joint structure shown in FIGS. 1 and 2 is an embodiment in which three steel beams 3 are connected in two directions, such as when the steel columns 2 are side columns. However, as described above, the bolt portion 4a of the connecting metal fitting 4 on the side to which the steel beam 3 is not connected is fixed to the bearing metal fitting 7 by the nut 9, so that the tensile force from the steel beam 3 in that direction is applied to the concrete. It has a structure that ensures transmission to the 1st.

The tightening of the nut 9 is performed after the filling and hardening of the concrete 1 which bears the reaction force of the tensile force of the connecting hardware 4 is completed, but the filling of the concrete 1 is done in advance at the factory for the sake of the efficiency of on-site work. There are also times when you go.

To connect the pillars and beams, first, the connecting hardware 4, 4'and the bearing metal 6 are installed on the steel pillar 2, and the coupler 8 and the nut 9 are screwed into the bolt portions 4a, 4a of the connecting hardware 4. Then, the concrete 1 is filled in a state in which the connecting hardware 4 and 4'and the bearing metal 6 are temporarily fixed.

After that, waiting for the hardening of the concrete 1,
The coupler 8 is tightly connected to the bearing metal 6 to give a required tension to the connecting metal 4, and then the metal joint 5 is connected to the flat metal joint 12
Connection by bolting to the coupler 8 at.

Further, the steel beam 3 is erected horizontally between the upper and lower joint metal parts 5, 5 and is joined by high-strength bolt joints by sandwiching the flange from the upper and lower sides by the flat plate-shaped support portion 11 to form a steel frame. Joining construction of the steel beam 3 to the pillar 2 is completed.

4 and 5 show another embodiment of the metal joint.

As shown in FIG. 4, the joint metal 5 connected to at least one bolt portion 4a of the joint metal 4 arranged orthogonally inside the steel column 2 and joined to the flange of the steel beam 3 is connected. A flat plate-like joint portion 12 having bolt holes 12a for bolt-joining to the bolt portion 4a of the hardware 4 via the coupler 8 is provided at least in the upper and lower portions, and the flat plate-like joint portion 12 is provided with a central portion between the upper and lower portions thereof. The steel frame beam 3 is formed in a substantially cross shape with a flat plate-shaped support portion 11 having a plurality of bolt holes 11a formed for joining high-strength bolts to a flange.

The high-strength bolt connection between the flat plate-shaped support portion 11 and the flange of the steel frame beam 3 is performed only on one surface of the flange of the steel frame beam 3.

As shown in FIG. 5, the joint metal piece 5 connected to at least one bolt portion 4a of the joint metal piece 4 arranged orthogonally inside the steel frame column 2 and joined to the flange of the steel frame beam 3 is connected. A flat plate-like joint 12 having bolt holes 12a at least in the upper and lower portions for bolting to the bolt portion 4 of the metal fitting 4 via the coupler 8 and a protrusion provided at the central portion between the upper and lower portions of the flat plate-like joint 12 It is formed in a substantially cross shape from the butt welding portion 13 to the joint end of the flange of the steel frame beam 3.

The butt-welding portion 13 has an oblique cut portion 13a for performing butt-welding with the flange of the steel frame beam 3.
And a backing portion 13b for preventing shrinkage deformation during welding work
Are formed, and the joint metal 5 and the steel beam 3 are joined by welding.

[0040]

The present invention is as described above, and the stress from the steel beam is caused by the connecting metal piece arranged orthogonally in the steel column and the bearing metal piece circumscribing the steel column and stiffening the flange thereof. The coupling hardware and bearing metal are both fixed to the steel column by screwing couplers and nuts on the bolts at both ends of the coupling hardware, and the coupling hardware that joins the steel column and the steel beam together. Since the connection with the metal fitting is made via a coupler, many of the joints can be configured without depending on welding, which simplifies the assembly in the factory and the construction on site, and accordingly Work efficiency can be improved.

In addition, a gap is formed in the flat portion of one of the connecting metal pieces which are orthogonal to each other so that the other connecting metal piece penetrates and an orthogonal crossing can be performed.
That is, since the upper end of the steel beam can be positioned at the same level without the need for other parts, it is easy to lay the floor formwork, and at the same time, the slab plate thickness can be kept uniform.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a pillar / beam joint structure of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged view of part B in FIG.

FIG. 4 is a cross-sectional view showing another mode of the metal joint in the joint structure of the present invention.

FIG. 5 is a cross-sectional view showing another embodiment of a metal joint in the joint structure of the present invention.

[Explanation of symbols]

1 ... Concrete, 2 ... Steel columns, 3 ... Steel beams, 4, 4 '...
Connection hardware, 4a ... Bolt portion, 5 ... Joining hardware, 6 ... Bearing metal, 7 ... Flat portion, 7a ... Void, 8 ... Coupler, 9 ... Nut, 10 ... Gusset plate, 11 ... Flat plate supporting portion, 11a ...
Bolt hole, 12 ... Flat plate joint, 12a ... Bolt hole, 13 ... Butt weld, 13a ... Diagonal cut, 13b ... Backing part.

Claims (5)

[Claims] 1. A connecting metal object, which is orthogonally arranged inside a closed-section steel frame column filled with concrete and has bolt portions at both ends, and a support circumscribing the steel frame column at the position of the connecting metal frame for flange reinforcement. Using a metal fitting and a metal joint to be joined to the flange of the steel beam, the joint structure is formed by joining the steel beam to the steel column, and the one connecting metal piece orthogonal to each other is the bearing metal article. A flat part having a flat cross-sectional shape and a part of a void is formed in the middle part of the flat part, and the other part is connected by penetrating the void of the flat part. A pillar-beam joint part, wherein the metal parts intersect in an orthogonal state, and at least one bolt part of the orthogonal connecting metal part is connected to a joint metal part joined to the flange of the steel frame beam. Construction. 2. The joining metal object connected to at least one bolt portion of the connecting metal object arranged orthogonally inside the steel column has a plurality of bolt holes formed for joining high-strength bolts to the flange of the steel frame beam. In the steel frame beam of the jointed metal article, the flattened support section and the flat joint section having a bolt hole for bolting to the bolt section of the connecting metal article through a coupler are formed in a substantially L shape. The column-beam joint structure according to claim 1, wherein the joint to the flange is performed by high-strength bolt joints with the flange of the steel beam sandwiched between the flat plate-shaped support portions. 3. A joint metal article which is connected to at least one bolt portion of a connecting metal piece orthogonally arranged inside a steel frame pillar and which is joined to a flange of a steel frame beam, is connected to a bolt portion of the connecting metal piece through a coupler. A flat plate-like joint having at least upper and lower portions for bolt connection and a projecting projection in the center between the upper and lower portions of the flat plate-like joint, for high-strength bolt connection to a flange of a steel beam. The column-beam joint structure according to claim 1, wherein the column-beam joint structure is formed in a substantially cross shape from a flat plate-shaped support portion having a plurality of drilled bolt holes. 4. A joint metal piece that is connected to at least one bolt portion of a connecting metal piece orthogonally arranged inside a steel frame pillar and is joined to a flange of a steel frame beam through a coupler to the bolt portion of the connecting metal piece. A flat plate-like joint having bolt holes at least in the upper and lower parts and a butt-welding part projecting at the central portion between the upper and lower parts of the flat plate-like joint to the joint end of the flange of the steel frame beam And a diagonal cross section for performing butt welding with the flange of the steel beam, and a backing section for measures against shrinkage deformation during welding work are formed in the butt welding section. The column-beam joint structure according to claim 1, wherein the column-beam joint structure is provided. 5. The bearing metal has a high strength, and
The column-beam joint structure according to claim 1, wherein the inside of the steel frame column having a closed cross-sectional shape is not filled with concrete.