JP2719543B2 - Beam-column joint - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a beam-column joint for joining a reinforced concrete column and a steel beam.

[Prior Art] Conventionally, as a beam-column joint for joining a column and a beam to each other at an intersection (panel zone) thereof, for example, a beam-column joint member as shown in FIGS. 5 and 6 has been known. (See Japanese Patent Application Laid-Open No. 1-190838).

This beam-column joint member 30 presses concrete inside,
Connection part (panel zone) 32 of filled square steel pipe column 31
A forged, cast diaphragm 33 is interposed.Through holes 34 for flowing concrete C are provided at the center and four corners of the diaphragm 33, and an edge 35 and a backing material 36 are provided on the side surface of the diaphragm 33. The steel pipe column 31 and the beam 37 are joined to each other at the connection portion 32 by projecting and integrally welding the ends of the beam 37 to the edge 35 and the backing material 36.

[Problem to be Solved by the Invention] However, the above-mentioned conventional beam-column joint member 30 can be applied to a steel pipe column 31, but can be applied to a reinforced concrete column for the following reasons, for example. It was not possible, and its scope was limited.

That is, when the above-mentioned beam-column joint member 30 is to be applied to a reinforced concrete column, the upper and lower ends of the beam 37 in the beam direction are welded to the independent flat and thin diaphragm 33 for the upper and lower sides. We have no choice but to join. For this purpose, it was necessary to install the upper and lower diaphragms 33 in a reinforced concrete column with dimensional accuracy suitable for the beam. Then, it was necessary to secure the rigidity of the joint by welding and joining the upper and lower ends of the beam 37 to the beam joining member 30.

The present invention has been made in view of the above circumstances, while ensuring sufficient filling efficiency of concrete to the joint of the reinforced concrete columns and steel beams, excellent workability of dimensional accuracy at the joint of both, It is another object of the present invention to provide a beam-column joint having excellent joint rigidity.

[Means for Solving the Problems] The invention according to claim 1 is characterized in that a panel zone body serving as a beam-column joint is interposed at a connecting portion between reinforced concrete columns,
The panel zone body includes a joint metal member arranged at the upper and lower flange positions of a steel beam to be joined to the column, and an outer peripheral plate that connects the upper and lower joint metal members to each other so as to surround the column outer peripheral portion therebetween. The upper and lower flanges of the beam are respectively joined to upper and lower joining hardware, and the joining hardware has the largest thickness in the column extending direction at least on the outer peripheral edge side. The side wall has a maximum thickness portion having a step formed at one end in the extending direction of the pillar within one place, and has through holes at the center or at four corners. A stepless flat plate-shaped ridge on which the end of the flange of the beam is placed is directly provided on the outer surface of the largest thickness portion at the outer peripheral edge of one or both of the joint hardware.

According to a second aspect of the present invention, in accordance with the first aspect of the present invention, a protrusion protruding in a direction in which a pillar extends is formed continuously in a circumferential direction on an outer peripheral edge of the metal joint, so that the maximum thickness is increased. It is characterized by being a department.

According to a third aspect of the present invention, in the invention according to the second aspect, a welding groove for an outer peripheral plate is provided on the outer surface of the projecting portion as the step portion.

According to the present invention, by joining a rigid panel zone body composed of upper and lower joint hardware and an outer peripheral plate surrounding a column portion between the upper and lower joints at the joint portion of the reinforced concrete column, the upper and lower joints are formed. It is possible to secure a high-precision interval suitable for the size of the beam with respect to the hardware.

In addition, since the through holes are secured at the center or the four corners of the metal joint, the filling property of the concrete to the joint is improved, and an effective reinforcing bar can be arranged.

Further, since the upper and lower flanges at the ends of the steel beam are joined to the side surfaces of the respective joints, the jointability is excellent.

And since a protrusion is provided in the outer surface of one or both of the upper and lower joint hardware, the position of the beam is set, and the protrusion can serve as a back metal.

In addition, the metal joint having the ridge has the largest thickness in the extending direction of the pillar at least on the outer peripheral edge side, and has a step formed at one end of the outer surface thereof in the extending direction of the pillar.
Since the maximum thickness portion within the maximum thickness portion is formed, and a stepless flat ridge on which the end of the flange of the beam is placed is directly provided on the outer surface of this maximum thickness portion, the shape is It can be simplified, and therefore can be manufactured easily, and stress transmission in a beam-joined state can be reliably performed.

Embodiment FIG. 1 shows a first embodiment of the present invention, in which reference numeral 1 denotes a reinforced concrete column, reference numeral 2 denotes a steel beam, and reference numeral 3 denotes a panel zone body. I have.

The column 1 has a rectangular cross section in which concrete 4 is mainly used and reinforcing bars 5 for reinforcement are arranged inside the column, and a joint 6 between the upper and lower columns 1 and 1 has an end portion of the beam 2. A panel zone (intersection) 7 to be joined to the column 1 is formed. The beam 2 is made of a steel frame having an I-shaped cross section.
The upper and lower ends are formed with flanges 9 and 10, respectively.

The panel zone 7 is provided with the panel zone body 3 which is a feature of the present invention. Panel zone body 3
The joint hardware 11, 12 arranged at the height position of the upper and lower flanges 9, 10 of the beam 2, and these joint hardware 11, 12
It is a rigid body composed of an outer peripheral plate 13 connected by welding so as to surround the outer peripheral portion of the column 1a.

Protrusions 17 are provided on the outer surfaces of the joining hardware 11, 12, and receive the flanges 9, 10 of the beam 2 by the protrusions 17. In this embodiment, the ridges 17 are provided on both the upper and lower metal joints 11 and 12, but may be provided only on one of the upper metal joint 11 and the lower metal joint 12.

The specific shape of the metal joint 11 is as shown in FIGS. 3 and 4, respectively. That is, it is a diaphragm having a rectangular shape in plan view whose overall shape substantially matches the cross-sectional shape of the column 1. Rib part 15 to connect
And has the following shape. The outer peripheral portion 14 and the rib portion 15 are the thickest portions having the largest thickness, and the outer peripheral portion 14
The ridge 17 is provided on the outer surface of the. Also rib part
The interior excluding 15 is a through hole 16 through which a trummy tube (not shown) for concrete placement of the pillar 1 can penetrate and the reinforcing bar 5 can be inserted. That is, through holes 16 are formed at the center and four corners or four corners of the metal joint 11. Further outer periphery
Slightly below the center of the outer surface of 14 is the upper flange 9 of the beam 2.
Stepless flat plate-shaped ridges 17 on which the ends ride are respectively provided to protrude forward. Reference numeral 18 denotes an air vent hole that penetrates the metal joint 11 in the thickness direction.

The entire metal joint 11 is integrally formed by casting or forging. The shape and structure of one of the joint hardware 12 are the same as those of the joint hardware 11, but as described above,
May not be provided.

The outer peripheral plate 13 connects the upper and lower joint hardware 11 and 12 to each other so as to surround the column 1a as described above. More specifically, the outer peripheral plate 13 turns around in close contact with the outer peripheral portion of the column 1a, and Each outer part
14 is connected by welding.

Such a panel zone body 3 is joined to the beam 2 as follows.

First, the panel zone body 3 is installed so that a reinforcing bar is inserted into the upper end joint 6 of the existing column 1. Then, the ends of the upper and lower flanges 9 and 10 of the beam 2 abut on the ridges 17 of the upper and lower joint hardware 11 and 12, respectively, and the ends of the upper and lower flanges 9 and 10 abut against the side surfaces of the joint hardware 11 and 12. Welded. Further, the end of the web 8 of the beam 2 is welded to the outer peripheral plate 13. In addition, the case where the protrusion 17 is not provided in either of the joint hardware 11 or 12 may be adopted.

Alternatively, a gusset plate (not shown) may be attached to the outer peripheral plate 13 by welding, and the gusset plate may be bolted to the web 8 of the beam 2.

In the case where concrete is poured into the pillar 1a and the pillar 1 on the pillar 1a, a formwork is installed so as to surround the outer periphery of the pillar 1 on the panel zone body 3, and the reinforcing bar 5 is provided therein. In this state, a tremy tube is inserted into the through hole 16 and concrete 4 is poured into the column 1a. As a result, the concrete 4 is filled in the column 1a in the panel zone 7, and then the concrete 4 is poured into the formwork and the upper column 1 is constructed.

FIG. 2 shows a second embodiment of the present invention. In this embodiment, in the panel zone body 3 in the first embodiment, the outer surface is made to coincide with the outer peripheral portion 14 at a side portion, that is, an outer peripheral portion 14 corresponding to the outer peripheral portion of the column 1 of the metal joint 11, and the outer peripheral plate 13 is formed.
A projection 20 that projects in the axial direction, that is, the extending direction of the column 1 is formed continuously with the outer surface in the circumferential direction.

That is, projecting portions 20 are provided on the upper and lower surfaces of both sides of the outer peripheral portion 14 so as to be flush with the outer peripheral surface of the column 1. The protrusion 20 has the effect of improving the strength of the end of the column 1 against the horizontal shearing force acting on the column 1 or the bending moment acting around the panel zone body 3.

In addition, the protrusions 20 may be provided on only one side in addition to the opposite sides of the outer peripheral portion 14. Further, when it is desired to further increase the strength of the joint end of the column 1, the protrusions 20 are provided over the entire circumference. Is also good. Optional depending on design and construction. In this case, the protruding portion 20 and the outer peripheral portion 14 on which the protruding portion 20 is formed become a maximum thickness portion.

A welding groove 21 forming a step for welding the outer peripheral plate 13 is formed at an end of the outer surface of the projection 20 of the joint hardware 11, 12 in the column extending direction.
Is provided in one place.

That is, as shown in FIG. 2, V-groove-shaped welding grooves 21 that are continuous in the circumferential direction are provided at the outer surface tips of the projecting portions 20 and 20 of the metal joints 11 and 12 that face each other. .
Therefore, by using these welding grooves 21, the inner surfaces of the upper and lower ends of the outer peripheral plate 13 which is brought into close contact with the outer periphery of the column 1 and the joining hardware are provided.
Welding with 11 and 12 is performed.

According to this embodiment, since the joining hardware 11, 12 and the outer peripheral plate 13 are securely welded, the panel zone body 3 can have a more rigid structure, and the rigidity in the panel zone 7 can be improved. There is an effect that can be done.

Further, the shape of each outer peripheral portion 14 of the joint hardware 11, 12 is
Since it is flush with the outer surface, there is an advantage that welding of the beam 2 is facilitated.

[Effects of the Invention] As described in detail above, according to the present invention, a rigid panel zone composed of upper and lower joint hardware and an outer peripheral plate surrounding a pillar portion therebetween is provided at a joint portion of a reinforced concrete column. By interposing the body, the upper and lower joint hardware,
Accurate intervals suitable for beam dimensions can be secured. Therefore, a joint having high dimensional accuracy can be reliably obtained with a small number of parts.

In addition, since the through holes are secured at the center or the four corners of the metal joint, the filling property of the concrete to the joint is improved, and an effective reinforcing bar can be arranged. Therefore, a high-strength column can be formed.

Further, since the upper and lower flanges at the ends of the steel beam are joined to the side surfaces of the respective joints, the jointability is excellent.

And since the ridge is provided on the outer surface of the metal joint, the position of the beam is set, and the ridge plays the role of the backing metal, so that a sound welded joint can be easily obtained. .

In addition, the metal joint having the ridge has the largest thickness in the extending direction of the pillar at least on the outer peripheral edge side, and has a step formed at one end of the outer surface thereof in the extending direction of the pillar.
Since the maximum thickness portion within the maximum thickness portion is formed, and a stepless flat ridge on which the end of the flange of the beam is placed is directly provided on the outer surface of this maximum thickness portion, the shape is Therefore, it is possible to simplify the manufacturing process, to reduce the manufacturing cost, and to surely transmit the stress in the beam-joined state.

[Brief description of the drawings]

FIG. 1 is a sectional view of a beam-to-column joint showing a first embodiment of the present invention, FIG. 2 is a sectional view of a beam-to-column joint showing a second embodiment of the present invention, and FIGS. FIGS. 5 and 6 show a conventional example of the present invention. FIG. 5 is a longitudinal sectional view of a beam-column joint member, and FIG. 6 is a beam-column joint. It is a horizontal sectional view of a part. 1 ... pillar, 2 ... beam, 3 ... panel zone body, 4 ... concrete, 5 ... rebar, 7 ... panel zone, 9, 10
…… Flange, 11, 12 …… Connection hardware, 13 …… Peripheral plate, 14
… .Outer peripheral part (side part), 16… Through hole, 17… ridge, 20…
... projecting part, 21 ... welding groove.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiro Yoshimura 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hiroo Tominaga 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction (72) Inventor Hidenari Matsuo 1-9-1, Kitahama-ku, Wakamatsu-ku, Kitakyushu-shi, Fukuoka Prefecture Inside the Wakamatsu Plant, Hitachi Metals Co., Ltd. No. Hitachi Metals, Ltd. Wakamatsu Factory (72) Inventor Jun Yamada 4-1-1, Toyo, Koto-ku, Tokyo Inside Hitachi Metals & Machinery Co., Ltd. (56) References JP-A-62-133239 (JP, A) Hei 1-295939 (JP, A)

Claims (3)

(57) [Claims] 1. A panel zone body serving as a beam-column joint is interposed at a joint between reinforced concrete columns, and the panel zone body is disposed at upper and lower flange positions of a steel beam to be joined to the column. The joining hardware and the upper and lower joining hardware are rigid bodies composed of an outer peripheral plate connecting the upper and lower joining hardware so as to surround the column outer peripheral portion therebetween, and the upper and lower flanges of the beam are joined to the upper and lower joining hardware, respectively. In the metal joint, at least the outer peripheral edge side has the largest thickness in the direction in which the pillar extends, and the outer surface thereof has at least one step formed at one end in the direction in which the pillar extends. A maximum thickness portion is formed, and a through hole is provided at the center or at the four corners, and the outer surface of the maximum thickness portion at the outer peripheral edge of one or both of the upper and lower metal fittings has a beam. Stepless flat with the end of the flange Column Joints characterized in that the Jo ridges are provided directly. 2. A maximum thickness portion is formed on an outer peripheral edge of the metal joint so as to be continuously formed in a circumferential direction so as to protrude in a direction in which a pillar extends. Item 2. A beam-column joint according to item 1. 3. A beam-to-column joint according to claim 2, wherein a weld groove for an outer peripheral plate is provided on the outer surface of said projecting portion as said stepped portion.