JPH09217418A - Beam-column joint hardware - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a beam-column joint hardware of monolithic construction used by burying it in a part of a reinforced concrete column. SOLUTION: This beam-column joint hardware is equipped with a rib section formed in a cross-shape, a T-shape or an L-shape in a plane view and thinned in the vertical direction and a substrate 3 provided to the beam joint side end of the rib section 2 in the horizontal section and are monolithically molded of cast steel, forged steel, spheroidal graphite steel, etc. A groove for making welding joint of a beam joint plate is provided to the substrate 3, or the beam joint plate is monolithically formed of the substrate. The length of the rib section 2 in a specific direction is shortened. An auxiliary rib being not joined to the beam is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column / beam joining metal article for joining a reinforced concrete column and a steel beam or a steel reinforced concrete beam.

[0002]

2. Description of the Related Art Conventionally, a metal fitting for joining a reinforced concrete column and a steel beam or a steel reinforced concrete beam has been disclosed in Japanese Patent Laid-Open No. 4-24338, in which a cross-shaped embedded metal and a flange of the steel beam are formed. It is known to weld and join a joining plate for joining by bolts. As shown in FIG. 14 (cross-sectional view) and FIG. 15 (longitudinal cross-sectional view) of the conventional example, a pair of upper and lower cross-shaped metal fittings 38 are reinforced baskets 31 of a reinforced concrete column C.
The joining plate 38 of the cross-shaped joining hardware 38, which is disposed in the
By b, the tensile force due to the bending moment of the steel beam D is reliably supported by the reinforced concrete column C. In addition, the force can be transmitted to the steel beam facing the steel beam D via the cross-shaped joint hardware 38.

The cross-shaped joint hardware 38 is composed of an embedded hardware 38a arranged inside the rebar cage 31 and a joint plate 38b for bolt-joining the flange of the steel beam D. The embedded metal object 38a is configured by welding and the like in a cross shape, and the joint plate 38b is connected to the tip of the embedded metal object 38a by welding and extends to the outside of the reinforced concrete column C in the steel beam direction.

The embedding hardware 38a of the cross-shaped metal fitting 38 is
As mentioned above, it is necessary to weld and join in a cross shape,
There is a problem that it takes time and effort to manufacture by welding.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an integrated structure for a pillar-beam joint which is used by being embedded in a reinforced concrete pillar which can save welding work.

[0006]

A pillar-beam joining metal fitting of the present invention is used by being embedded in a beam-joint portion of a reinforced concrete column at a joint portion between a reinforced concrete column and a beam, and has a cross shape or a plan view. It is characterized in that it has a T-shaped or L-shaped vertically thin rib portion and a substrate portion arranged horizontally at the beam joining side end of the rib portion, and is integrally formed. In addition, it is characterized in that a gradient is provided in a vertical cross section of the rib portion. Further, in order to increase the bearing pressure resistance of the concrete, the thickness of the substrate portion is gradually increased from the beam-joining side end of the substrate portion toward the central portion of the beam-joining metal article.

Further, in order to increase the cross section of the cross portion, the T-shaped portion, or the L-shaped portion where the tensile forces from the girder direction of the rib portion and the direction orthogonal to the cross direction, the cross portion or the T-shaped portion from the substrate portion is enlarged. It is characterized in that a gradient for gradually increasing the thickness toward the portion or the L-shaped portion is provided. Further, in order to increase the bearing pressure resistance of the concrete, a bearing plate is provided on the side surface of the substrate portion. Further, the pressure bearing plate is integrally formed by casting or forging. Further, the invention is characterized in that it is made of cast steel or forged steel, and a welding groove for welding and joining a joining plate to be joined to the beam is formed at the beam joining side end of the substrate portion.

Further, the present invention is characterized in that a portion corresponding to a joint plate which is made of spheroidal graphite cast iron and is joined to the beam is integrally provided at an end of the substrate portion on the beam joint side. Then, the spheroidal graphite cast iron joining plate corresponding part to be joined to the beam of the substrate part and the beam are fastened with a high-strength bolt.

Further, it is characterized in that the intersections of the sides of the cross, T-shape or L-shape in plan view are arranged eccentrically with respect to the center of the reinforced concrete column. Further, the pillar / beam joining metal article of the present invention is characterized in that an auxiliary rib portion for supporting a tensile force is provided on the side not joined to the beam.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION First, a description will be given of an embodiment of a metal article for joining columns / beams for joining beams in four directions of reinforced concrete columns, particularly a metal article for column / beam joining suitable for use as a middle column of a building. .

(First Embodiment) FIG. 1 is a perspective view of a first embodiment of the present invention. The pillar / beam joining metal fitting 1 has a rib portion 2 having a cross shape in plan view and a substrate portion 3 arranged in the horizontal direction, and is integrally formed. The board portion 3 is connected to a beam (not shown). The rib portion 2 supports the substrate portion 3, and the rib portion 2 which is perpendicular to the beam direction is subjected to a bending moment on the beam, and when a tensile force acts on the column / beam joining hardware, the tension Support your power. Further, by making the wall thin in the vertical direction, the filling property of concrete and the arrangement of reinforcing bars are facilitated.

(Embodiment 2) In the structure of Embodiment 1, a gradient in which the thickness gradually increases toward the substrate portion 3 is provided in the vertical cross section of the rib portion 2. In this case, the actions and effects of the rib portion 2 and the substrate portion 3 are similar to those in the first embodiment.

(Third Embodiment) FIG. 2 is a partial perspective view of a substrate portion 3 according to a third embodiment of the present invention. In the configuration of the first embodiment, the thickness of the substrate portion 3 is gradually increased from the beam-joining side end 3a of the substrate portion 3 toward the central portion of the pillar / beam-joining metal article. Region 12 in which the thickness of the substrate portion 3 is gradually increased
This makes it possible to increase the bearing pressure resistance of the concrete. Further, similarly to the second embodiment, it is possible to provide a gradient in the vertical cross section of the rib portion 2.

(Fourth Embodiment) FIG. 3 is a schematic cross-sectional view of a fourth embodiment of the present invention. In the configuration of the first embodiment, in order to increase the cross-section of the cross portion where the tensile force from the girder direction of the rib portion 2 and the direction orthogonal thereto, the wall thickness gradually increases from the substrate portion 3 toward the cross portion. Slope 13
Is provided. In this embodiment, the case of the cross shape in a plan view is described, but the T for the side pillar and the beam joint T
Similarly, in the case of a letter shape or an L shape of a pillar / beam joining metal for corner posts, a gradient may be provided to gradually increase the wall thickness from the substrate portion 3. Further, similarly to the second embodiment, it is possible to provide a gradient in the vertical cross section of the rib portion 2. further,
Similarly to the third embodiment, the thickness of the substrate portion 3 can be gradually increased from the beam-joining side end 3a toward the center of the pillar / beam-joining metal article. These configurations can be applied in an appropriate combination.

(Fifth Embodiment) FIG. 4 is a partial perspective view of a substrate portion 3 having a pressure bearing plate according to a fifth embodiment of the present invention.
In the configuration of the first embodiment, the pressure bearing plates 14 are provided on both side surfaces of the substrate portion 3 by welding. The bearing plate 14 may be integrally formed by casting or forging. This makes it possible to increase the bearing pressure resistance of the concrete. Further, the configurations of the above-described second to fourth embodiments can be applied individually or in combination.

(Sixth Embodiment) FIG. 5 is a plan view of the sixth embodiment, and FIG. 6 is a front view of the same. In the configuration of the first embodiment, a welding groove 4 is further provided at the beam joining side end 3a of the substrate portion 3. This makes it possible to easily and soundly weld the joint plate 5 to be joined to the beam. As a material for integrally forming the pillar / beam joining metal fitting 1,
Cast steel or forged steel is used in consideration of weldability.

(Embodiment 7) In the configuration of Embodiment 1, the beam joint side end 3a of the substrate portion 3 is projected toward the beam direction side from the outer surface of the reinforced concrete column and is formed long so as to be joined to the beam. That is, the pillar / beam-joining metal article 1 in which a portion corresponding to the bonding plate 5 in Embodiment 6 is integrally formed by projecting from the beam-joining side end 3a. Since the rib portion, the substrate portion, and the joining plate portion are all integrally formed, the welding work is eliminated, and the productivity of the pillar / beam joining metal piece is improved. In consideration of castability and strength, spheroidal graphite cast iron is used as a material for integrally forming the pillar / beam joining metal article 1.

(Embodiment 8) FIG. 7 is a schematic front view showing a mode of single-sided shear fastening with bolts according to an eighth embodiment of the present invention, and FIG. 8 is a schematic front view showing a mode of double-sided shear fastening with bolts. It is a figure. The plate / portion 1 and the flange portion 17 of the beam corresponding to the connection portion 16 of the base plate portion of the pillar / beam welding hardware 1 are attached.
It is fastened with a high-strength bolt 15 via 8. Among spheroidal graphite cast irons having various mechanical properties, spheroidal graphite cast iron having a high tension is used, and a spheroidal graphite cast iron column / beam joining metal article integrally formed by casting is applied.

(Ninth Embodiment) FIG. 9 is a plan view of a ninth embodiment of the present invention. In the configuration of the first embodiment, for example, the rib length in a specific direction like the rib portion 6 in FIG.
It is formed to be shorter than the other rib portions 2. Thereby, the intersection 7 of the cross can be brought closer to the rib portion 6 side than the center 8 of the reinforced concrete column 9. The effects of the rib portions 2 and 6 and the substrate portion 3 in this case are similar to those in the first embodiment. Further, similarly to the sixth embodiment, the welding groove 4 can be provided at the beam joining side end 3a of the substrate portion 3, and the effect and the applied material are the same as those in the sixth embodiment. Further, similarly to the seventh embodiment, the beam-joining side end 3a of the substrate part 3 is projected toward the beam direction side from the outer surface of the reinforced concrete column and is elongated so as to be joined to the beam so that the part corresponding to the joining plate is integrated. Can be formed in the same manner, and the effect and applicable material are similar to those of the seventh embodiment. Furthermore, when the beam is not joined in the rib 6 side direction, it can be used for a side pillar of a building. In this case, since the beam position in the girder direction can be brought closer to the outside of the building and the beam direction can be widened, the site space of the building can be widely and effectively used.

Next, an embodiment of a pillar / beam joining metal article for joining beams in three directions of a reinforced concrete column, particularly a column / beam joining metal article suitable for use as a side column of a building will be described.

(Tenth Embodiment) FIG. 10 is a perspective view of a tenth embodiment of the present invention. The pillar / beam joining hardware 1 has a T-shaped rib portion 2 in plan view and a substrate portion 3 arranged in the horizontal direction, and is integrally formed. The effects of the rib portion 2 and the substrate portion 3 are similar to those in the first embodiment. Further, similarly to the sixth embodiment, the welding groove 4 can be provided at the beam joining side end 3a of the substrate portion 3, and the effect and the applied material are also the same as those in the sixth embodiment. Furthermore, as in the seventh embodiment,
By projecting the beam-joining side end 3a of the substrate part 3 toward the beam direction side from the outer surface of the reinforced concrete column and making it long so that it can be joined to the beam, the part corresponding to the joining plate can be integrally formed. The applicable material is also the same as in the seventh embodiment. Further, when used as a side pillar, the upper side of the T-shape is connected to the girder direction of the building, and the lower end side of the vertical side is connected to the beam in the beam-to-beam direction. With the installation, the site space of the building can be widely and effectively used, as in the ninth embodiment.

(Eleventh Embodiment) FIG. 11 is a perspective view of an eleventh embodiment of the present invention. The pillar / beam joining hardware 1 is provided with an auxiliary rib 11 on the side not joined to the T-shaped plan view beam. When the tensile force in the girder direction of the building acts on the pillar / beam joining hardware 1, the auxiliary rib portion 11 assists in supporting this tensile force. Other aspects of the requirements and effects of the eleventh embodiment are similar to those of the tenth embodiment.

Next, a description will be given of an embodiment of a column / beam joining metal article for joining beams in two directions of a reinforced concrete column, particularly a column / beam joining article suitable for use as a corner column of a building. (Embodiment 12) FIG. 12 is a perspective view of Embodiment 12 of the present invention. The pillar / beam joining hardware 1 has an L-shaped rib portion 2 in a plan view and a substrate portion 3 arranged in a horizontal direction, and is integrally formed. The effects of the rib portion 2 and the substrate portion 3 are similar to those in the first embodiment. Further, similarly to the sixth embodiment, the welding groove 4 can be provided at the beam joining side end 3a of the substrate portion 3, and the effect and the applied material are also the same as those in the sixth embodiment. Further, similarly to the seventh embodiment, the beam-joining side end 3a of the substrate part 3 is projected toward the beam direction side from the outer surface of the reinforced concrete column and is elongated so as to be joined to the beam so that the part corresponding to the joining plate is integrated. Can be formed in the same manner, and the effect and applicable material are similar to those of the seventh embodiment. Further, when used as a corner post, each side of the L-shape is connected to the beam, but by installing each side close to the outside of the building, as in the ninth embodiment, the site space of the building is constructed. Can be widely and effectively used. Furthermore, the second embodiment described above
The configurations in Embodiment 5 can be applied individually or in combination.

(Thirteenth Embodiment) FIG. 13 is a perspective view of a thirteenth embodiment of the present invention. An auxiliary rib 11 is provided on the side of the pillar / beam joining hardware 1 that is not joined to the beam. The auxiliary rib portion 11 assists in supporting the tensile force when the tensile force from the beam is applied to the pillar / beam joining hardware 1.
Other aspects of the requirements and effects of the thirteenth embodiment are similar to those of the twelfth embodiment.

[0025]

The present invention has the following effects. (1) It is possible to save the labor of manufacturing the metal fitting for welding by welding or the like. (2) Cast steel or forged steel, or spheroidal graphite cast iron can be easily manufactured with an integral structure. (3) Since the rib portion forms a surface perpendicular to the tensile force direction, the tensile force can be reliably supported by the reinforced concrete column. Further, since the auxiliary rib can be provided, the support becomes more reliable. (4) Since the rib portion is formed to be thin in the vertical direction, it is easy to fill the concrete and arrange the reinforcement. (5) Since the groove is provided at the tip of the substrate, the welding work is easy and reliable.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of a pillar / beam joining metal article of the present invention.

FIG. 2 is a partial perspective view of a substrate portion of a third embodiment of a pillar / beam joining metal article of the present invention.

FIG. 3 is a schematic cross-sectional view of Embodiment 4 of the present invention for connecting a pillar and a beam.

FIG. 4 is a partial perspective view of a base plate portion on which a pressure bearing plate of Embodiment 5 of the present invention for pillar / beam joining is formed.

FIG. 5 is a plan view of a sixth embodiment of a pillar / beam joining metal article of the present invention.

FIG. 6 is a front view of a sixth embodiment of a metal article for pillar / beam joining of the present invention.

FIG. 7 is a schematic front view of an eighth embodiment of the metal article for pillar / beam joining of the present invention.

FIG. 8 is a schematic front view of an eighth embodiment of the metal article for pillar / beam joining of the present invention.

FIG. 9 is a plan view of Embodiment 9 of the present invention for pillar / beam joining.

FIG. 10 is a tenth embodiment of a metal article for pillar / beam joining of the present invention.
It is a perspective view of.

FIG. 11 is an eleventh embodiment of the metal article for pillar / beam joining according to the present invention.
It is a perspective view of.

FIG. 12 is a twelfth embodiment of the present invention for connecting a pillar and a beam.
It is a perspective view of.

FIG. 13 is a thirteenth embodiment of a metal article for joining columns and beams according to the present invention.
It is a perspective view of.

FIG. 14 is a cross-sectional view of a conventional example of a reinforced concrete column / steel beam beam joint structure structure.

FIG. 15 is a longitudinal sectional view of a conventional example of a reinforced concrete column / steel beam beam joint structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Column / beam joining hardware 2 Rib section 3 Substrate section 3a Beam joining side edge of substrate section 4 Weld groove 5 Joining plate 6 Short rib section 7 Cross section of rib section in plan view 8 Center of reinforced concrete column 9 Reinforced concrete column outer shape 10 Top side rib portion of T-shape in plan view 11 Auxiliary rib portion 12 Area where the thickness of the substrate portion is gradually increased 13 Gradient to gradually increase the wall thickness from the substrate portion toward the cross portion 14 Bearing plate 15 High-strength bolt 16 Joining of substrate portion Plate Corresponding part 17 Flange part of beam 18 Plate 31 Reinforcing bar cage for column 38 Cross-shaped joining hardware 38a Embedded fitting 38b Joining plate C Column D Steel beam

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hidenari Matsuo 1-9-1 Kitahama, Wakamatsu-ku, Kitakyushu City Hitachi Metals Co., Ltd. Wakamatsu Factory (72) Inventor Tomio Ito 1-1-9 Kitahama, Wakamatsu-ku, Kitakyushu No. Hitachi Metals Co., Ltd. Wakamatsu Factory (72) Inventor Jun Yamada 2-4 Toyo, Koto-ku, Tokyo Hitachi Machinery Co., Ltd. (72) Seiji Umezawa 2-4 Toyo, Koto-ku, Tokyo In Hitachi Machinery Co., Ltd. (72) Inventor Akio Tomita 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) In-house Mitsumasa Yamamoto 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Yukimasa Ogihara 1-2-7, Moto Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Koichi Suzuki Tobita, Chofu, Tokyo Eyes 19th No. 1 Kashima Construction Co., Ltd. intra-technology Research Institute

Claims (11)

[Claims] 1. A reinforced concrete column is used by being embedded in a beam joint, and has a cross shape, a T shape, or an L shape in plan view and is thin in the vertical direction, and a horizontal direction at the beam connection side end of the rib section. A pillar / beam-joining metal article, characterized in that it has a base plate portion disposed in a. 2. The metal article for joining columns and beams according to claim 1, wherein the rib portion is provided with a gradient in a vertical cross section. 3. The thickness of the substrate portion is gradually increased from the beam-joining side end of the substrate portion toward the central portion of the beam-joining metal object in order to increase bearing resistance of concrete. The metal article for pillar / beam joining according to claim 1 or 2. 4. The cross section or T-shape from the base section to increase the cross section of the cross section, the T-shape section, or the L-shape section where the tensile force from the girder direction of the rib section and the tensile force from the direction orthogonal to the rib cross section increases. The metal article for joining columns and beams according to any one of claims 1 to 3, characterized in that a gradient for gradually increasing the wall thickness toward the portion or the L-shaped portion is provided. 5. The pillar / beam joining hardware according to claim 1, further comprising a bearing plate provided on a side surface of the base plate portion to increase bearing resistance of concrete. 6. The pillar according to claim 1, wherein a pressure bearing plate is integrally formed by casting or forging on a side surface of the base plate portion in order to increase pressure bearing resistance of the concrete. -A metal fitting for beam joining. 7. A weld groove for welding and joining a joining plate to be joined to the beam, which is made of cast steel or forged steel, and is formed at the beam joining side end of the substrate portion. The hardware for joining pillars and beams described in any of the above. 8. The spheroidal graphite cast iron, wherein a portion corresponding to a joining plate for joining with a beam is integrally provided at a beam joining side end of a substrate portion so as to integrally project. Column / beam joining hardware. 9. The pillar / beam joining metal article according to claim 8, wherein the joining plate corresponding portion integrally formed with the substrate portion and the beam are fastened with a high-strength bolt. 10. A cross shape, a T shape, or an L shape in plan view.
The intersection point position of each side of the character shape is arranged eccentrically with respect to the center of the reinforced concrete column.
The pillar / beam joining hardware according to any one of 1 to 9. 11. An auxiliary rib portion for supporting a tensile force is provided on the side not joined to the beam.
The pillar / beam joining hardware described in any of 1.