JP2979041B2 - Reinforcement structure of column / beam joint - 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, and more particularly to a reinforcing structure for a joint between a reinforced concrete (RC) column and a steel frame (S) beam.

[0002]

2. Description of the Related Art In general, a composite structure of a reinforced concrete column which is resistant to compression and a steel beam which is lightweight and capable of a large span can greatly reduce the weight of a building and significantly improve rigidity as compared with a steel frame structure. The structure is suitable for high-rise buildings.

Conventionally, as a structure of this kind of column / beam joint, as shown in FIG. 6, there is a structure in which a joint between a reinforced concrete column A and a steel beam B is surrounded by a surrounding plate C.

However, in the above-described conventional column / beam joint structure, since the thicknesses of the enclosing plates C are all the same, X
When a stress is applied to the steel beam B in the direction, there is a problem that a force for bending the steel beam B in the Y direction orthogonal to the direction acts, and the conventional enclosing plate C has only a function as a formwork. In addition, there is a problem that the steel frame concrete column A is not integrated with the concrete, and as a result, the surrounding plate is easily deformed.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to reduce the possibility of secondary excessive stress being exerted on orthogonal steel beams. It is another object of the present invention to provide a reinforcing structure for a column / beam joint that can significantly improve the deformation properties of a surrounding plate.

[0006]

According to the present invention, there is provided a reinforcing structure for a column / beam joint, wherein the joint between a reinforced concrete column and a steel beam is surrounded by a surrounding plate. Characterized in that the thickness of the joint portion with the substrate is greater than the thickness of the other portions. It is preferable to increase the thickness of the joint portion of the surrounding plate with the beam in accordance with the stress. Further, a cotter is provided inside the surrounding plate.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a steel beam in the X and Y directions made of an H-shaped steel, which is integrated in a cross shape orthogonally at a joint with a reinforced concrete column (not shown). Reference numeral 2 denotes an enclosing plate, which surrounds the joint.

As apparent from FIG. 2, the thickness t of the joint 2a of the enclosing plate 2 welded to the steel beam 1 is shown.
Is configured to be thicker than the plate thickness t ′ of the L-shaped corner portion 2b of the surrounding plate 2. The thickness t of the joint 2a
Is a thickness corresponding to the stress of the steel frame.

Since the enclosing plate 2 of this embodiment is constructed as described above, there is no danger of applying a secondary excess stress such as twisting to the orthogonal steel beam 1 and the thickness of the plate corresponding to the stress is reduced. It is economical.

FIG. 3 and FIG. 4 show another embodiment, in which a large number of cotters 3 are provided inside the enclosing plate 2 so as to integrate with the concrete in the joint portion and improve the deformability. Since it can be remarkably improved, a stable deformation loop can be obtained as shown in FIG.

[0011]

【The invention's effect】

1) Of the surrounding plates surrounding the joint between the column and the beam, the thickness of the joint with the steel beam is increased, so there is no danger of applying secondary excess stress such as twisting to the orthogonal steel beam. , And also economical. 2) Since a large number of cotters are provided inside the surrounding plate, integration with the concrete in the joint can be achieved, and as a result, the deformation properties can be significantly improved and a stable deformation loop can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a plan sectional view of FIG.

FIG. 3 is a plan view showing another embodiment in which a cotter is provided on the inner surface of the surrounding plate.

FIG. 4 is a side sectional view taken along the line II in FIG. 5;

FIG. 5 is a stress diagram.

FIG. 6 is a perspective view of a conventional column / beam joint structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel beam 2 Enclosure plate 2a Joint part 2b L-shaped corner part 3 Cotter t Plate thickness t 'Plate thickness

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-252830 (JP, A) JP-A 1-177302 (JP, U) JP-A 5-78701 (JP, U) (58) Investigation Field (Int.Cl. ⁶ , DB name) E04B 1/30 E04B 1/16

Claims (3)

(57) [Claims] In a structure in which the periphery of a joint between a reinforced concrete column and a steel beam is surrounded by a surrounding plate, a thickness of a joint portion of the surrounding plate with the steel beam is thicker than other portions. Column / beam joint reinforcement structure. 2. The structure for reinforcing a column / beam joint according to claim 1, wherein the thickness of the joint of the surrounding plate and the beam is increased in accordance with the stress. 3. The reinforcing structure for a column / beam joint according to claim 1, wherein a cotter is provided inside the enclosing plate.