JPH0728244Y2 - Beam-joining hardware at column-beam joints - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a beam-joining metal fitting for a column-beam joint, which simultaneously connects steel beams to be joined at the joint between a reinforced concrete column and a steel beam. is there.

[Problems to be solved by the invention] Normally, the joining of reinforced concrete columns and steel beams must rely on the metal fittings, but the metal fittings do not hinder the fluidity of the cast concrete and the workability of the reinforcement. Applicant is required to provide a metal fitting that meets this requirement.
Various proposals have been made in No. 12504 and No. 63-102803.

These metal fittings for beam connection are laid between columns and beams, and consist of a flat plate part that is bolted to the beam and a connection part that connects them, mainly due to the adhesion strength of the connection part embedded in the reinforced concrete column. This is a mechanism for transmitting the force from the beam to the pillar.The present invention was made based on the stress transmitting mechanism of the above-mentioned inventions, and it is a metal structure with a high stress transmitting effect and easy to manufacture. It is intended to propose a new metal object around the concrete when it is placed.

[Means for Solving the Problems]

In this invention, a single row of connecting portions, which are bolted to respective flanges of steel beams that are butted to a reinforced concrete column and which connect a flat plate portion having a plurality of bolt holes orthogonally in a cross shape in the reinforced concrete column, are vertically long. By forming it in a cross-sectional shape, the force from the beam is transmitted to the reinforced concrete column by the bearing stress acting on the connecting portion in the direction orthogonal to its acting direction, and the stress transmitting effect is enhanced.

〔Example〕

The present invention will be described below with reference to the drawings showing an embodiment.

As shown in FIG. 1 and FIG. 2 showing an example of its use, the beam-joining metal fitting 1 of the present invention (hereinafter referred to as “metal fitting 1”) is made of reinforced concrete with a flat plate portion 1a and a flat plate portion 1a joined to a flange of a steel frame beam 3 by bolts 4. It is composed of a row of connecting portions 1b that are connected in a cross shape in the pillar 2 at right angles, and is laid across the steel beams 3, 3 that are joined to the reinforced concrete pillar 2 in two directions, and these are connected at the same time. . A plurality of bolt holes 1c are formed in the flat plate portion 1a.

As shown in the figure, the one-row connecting portion 1b has a vertically long cross-sectional shape perpendicular to the plane of the flat plate portion 1a, and is embedded in the reinforced concrete column 2 so as to be vertically long.
Thus, the metal 1 has a mechanism for transmitting a tensile or compressive force acting on the steel beam 3 to the reinforced concrete column 2 as a bearing stress of the connecting portion 1b in a direction orthogonal to the direction.

The hardware 1 is, for example, as shown in FIGS.
The flat plate portion 1a and the connecting portion 1b continuous with the flat portion 1a are manufactured as a unit by forging, casting or the like, and the extra length portion of the connecting portion 1b is shown in FIG.
This is manufactured by cutting as shown in II, combining as many as the number of steel beams 3 as shown in III, and integrating the abutting portions of the connecting portions 1b by electroslag welding or the like.

FIG. 4 shows another manufacturing example of the metal 1 in which the central portion of the connecting portion 1b is thickened to reinforce the axial force transmitted from the flat plate portion 1a and the bearing stress that resists it. is there.

FIG. 5 shows a construction example in which the main bar 2a of the reinforced concrete column 2 is laid out by penetrating the flat plate part 1a of the hardware 1. In this case, the flat bar part 1a is drilled for inserting the main bar 2a. By inserting the main bar 2a into the hole 1d to be formed, there is an advantage that the metal 1 can be incorporated into the column main bar on the side of the reinforced concrete column 2 and positioned.

FIG. 6 shows a formation pattern of the metal piece 1. I
Is a basic type, and if the reinforced concrete pillar 2 is a middle pillar,
II is a case of a side pillar, III is a case of a corner pillar, and the hardware 1 is formed in a cross shape, a T shape, or an L shape depending on the location of the reinforced concrete pillars 2, that is, the number of steel beams 3 to be joined. It

[Effect of device]

This invention is as described above, and it is easier to fabricate than the conventional case where the connecting portion has a two-row well shape, and the one-row connecting portion embedded in the metal reinforced concrete has a vertically long cross-sectional shape. Since it is a structure, it becomes a mechanism that mainly transfers the force from the steel beam to the concrete column as bearing stress, which has a high stress transfer effect and is reliable and clear.

Further, since the connecting portions are in one row and are oriented in the vertical direction, the flowability of the cast concrete in the column portion is better than that of the conventional two-row connecting portions that form a well. That is, it is better to wrap around the cast concrete.

[Brief description of drawings]

FIGS. 1-I and II are plan views and elevation views showing the manufacturing example of the present invention, and FIGS. 2-I and II are plan views, elevation views and FIG. I, II, and III are the plan view, elevation view, and plan view, respectively, showing the manufacturing procedure of the metal object.
Fig. 4-I and II are plan views showing other fabrication examples,
An elevation view, FIGS. 5 -I and II show an embodiment in which a main column bar is inserted, respectively, a plan view, an elevation view, and FIGS. 6 -I and I.
3A and 3B are plan views showing the formation pattern of metal objects. DESCRIPTION OF SYMBOLS 1 ... Beam joining hardware, 1a ... Flat plate part, 1b ... Connection part, 1c ... Bolt hole, 1d ... Hole, 2 ... Reinforced concrete pillar, 2a ... Main bar, 3
… Steel beams, 4… Bolts.

Claims (1)

[Scope of utility model registration request] 1. A beam-joining metal fitting which is arranged at a joint between a reinforced concrete column and a steel frame beam and which simultaneously connects these across a steel frame beam joined to the reinforced concrete column,
It consists of a horizontal flat plate part with multiple bolt holes that is bolted to the flange of each steel frame beam, and a row of connecting parts that connect the flat plate parts in a cross shape orthogonally in the reinforced concrete column. A beam-joining metal fitting for a column-beam joint, which has a vertically long cross-section.