JP2985620B2 - Connection structure between reinforced concrete columns and steel beams - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure having a composite structure in which columns are reinforced concrete and beams are steel frames (hereinafter referred to as column RC beam S structure).

[0002]

2. Description of the Related Art In a conventional column RC beam S structure, as shown in FIG. 5, a steel frame to be a beam penetrates a reinforced concrete column.

[0003]

When a steel beam serving as a beam penetrates a concrete column and a bending moment is generated in the beam during an earthquake or the like as shown in FIG. A very high bearing pressure F ₀ results. It is difficult to properly evaluate the bearing pressure F _{0 due} to the design of the connection, and the relationship between the proof stress against the bearing pressure F ₀ and the method of reinforcing the connection is extremely unknown. Joint types and reinforcement methods have been proposed. Therefore,
The present invention provides a connection structure that is simple in design, easy to manufacture, and does not require complicated reinforcement.

[0004]

[Means for Solving the Problems] Reinforced concrete columns and iron
At the trabecular connection, all the joints of the reinforced concrete columns
Two upper and lower flanges with holes through the main bars
Through all the main reinforcements of the reinforced concrete column.
Steel frame with an end plate attached to the flange
Reinforced concrete concrete characterized by abutting and joining beams
The gist is the connection structure between the columns and steel beams. As shown in FIG. 1, the beam is cut, and an end plate is attached to the beam. Pillars are provided with upper and lower flanges, and appropriate
Drill a hole at the position where the
Then, all the main reinforcements of the column are penetrated to form a column, and a beam having an end plate attached to the upper and lower flange portions is joined. The beams may be joined directly or via a bracket.

[0005]

As shown in FIG. 4, when a bending moment is applied to the connection portion of the column RC beam S structure of the present invention, the web portion of the beam does not penetrate the column unlike the conventional case, so The bearing pressure is extremely small. Instead, a shear force acting in the opposite direction of S acts on the flange buried in the column, the bending moment withstands the bearing reaction force F generated on the end plate, and the bending moment acts on the shear force S of the flange. The end plate on the side perpendicular to the beam to be crushed resists. Therefore, no crushing occurs due to the effect of embedding the steel frame.

[0006]

FIG. 1 shows an example of a connection structure between a precast column 4 and a steel beam 5. As shown in FIG. Each of the beams 5 has an end plate 1 attached thereto, and columns have upper and lower flanges 2. The flange 2 is provided with a hole 3 through which the main reinforcement of the column passes. Beam 5
Is directly joined to the end plate 1 or joined via a bracket. FIG. 2 shows the case of a cast-in-place RC column, in which a flange is provided with a hole 6 for placing concrete in the flange.
Also, the pillar portion may be covered with a steel plate 7 to form a mold. FIG. 3 shows an example in which a mold is formed by coating with a steel plate.

[0007]

The effects of the present invention are as follows.

(A) The effect of embedding the steel frame is lost, the bearing reaction force at the column ends is small, and there is almost no need to consider the design, and a clear design is possible.

(B) Since the metal joint is composed of a simple flange and requires minimal processing, the design and manufacture of the metal joint are easy, leading to cost reduction.

[0010] (c) In the construction, a solid connection is formed only by passing the main column through the upper and lower flanges, so that the number of construction steps can be greatly reduced. If necessary, the formwork can be simplified by covering the joint area with a steel plate.

[Brief description of the drawings]

FIG. 1A is a plan view of a connection structure between a precast column and a steel beam. (B) is a side view of (a).

FIG. 2A is a plan view of a connection structure between a cast-in-place concrete column and a steel beam. (B) is a side view of (a).

FIG. 3A is a plan view in the case where a form is formed by coating with a steel plate. (B) is a side view of (a).

FIG. 4 is a diagram showing the operation of the present invention.

FIG. 5 is a view showing the operation of a conventional connection structure.

[Explanation of symbols]

1 end plate, 2 upper and lower flanges, 3
··· Holes for pillar main reinforcement, 4 · · pillars, 5 · · · steel beams or brackets, 6 · · · holes for concrete filling, 7 ···
・ Steel sheet form

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukimasa Ogihara 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Yoshio Fukada 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd. (72) Inventor Akio Tomita 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Shozo Maeda 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Corporation (56) References JP 6-25403 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) E04B 1/16-1/22 E04B 1/30

Claims (1)

(57) [Claims] At the connection between a reinforced concrete column and a steel beam, all the main bars are passed through the connection between the reinforced concrete columns .
The upper and lower two flanges provided with holes are provided, all the main reinforcements of the reinforced concrete columns are passed through the holes, and a steel beam having an end plate attached to the flange portion is abutted and joined. Structure of reinforced concrete columns and steel beams.