JP2756450B2 - Anchoring end reinforcement device for beam main reinforcement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for reinforcing an anchoring end of a main beam at an outer column / beam joint.

[0002]

2. Description of the Related Art An end of a beam main bar a at a joint of an outer column and a beam is bent into an L shape, and a fixing length is secured by the bent portion b. (See FIGS. 6 and 7)

[0003]

However, when the pull-out force P acts on the beam main bar a due to the seismic force, the pull-out force P concentrates on the bent portion of the beam main bar a, and the anchoring force of the beam main bar a becomes large. The portion is secured by the bent portion b of the beam main reinforcement a, and the concrete c inside the bent portion has a bearing Q
(See Fig. 8) In the figure, Mb is the beam moment, Mc
Is the column moment.

[0004] When the concrete c is crushed against the supporting pressure Q, the anchoring force of the main beam a is reduced and the mechanical performance is reduced. SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems of the prior art, and the object thereof is to fix an outer pillar and a beam main bar that can enhance the anchoring force of a beam main bar at a beam joint with a simple configuration. It is to provide an end reinforcement device.

[0005]

According to the present invention, there is provided an apparatus for reinforcing a fixing end portion of a main beam of a beam according to the present invention, wherein an arc-shaped fixing reinforcing iron plate having the same curvature as an inner diameter of a fixing end bent portion of a main beam of a beam is provided for one step. It is configured so as to be in contact with and fixed to each fixed end bent portion of the beam main reinforcement.

[0006]

According to the present invention, as described above, an arc-shaped iron plate having the same curvature as the inside diameter of the bent portion is attached and fixed over each fixed end bent portion of the beam main reinforcement for one step. Therefore, the pull-out force acting on the beam main bars due to seismic force or the like is transmitted from the bent end portion of each beam main bar to the arc-shaped fixing reinforcing iron plate, and the pull-out force is transmitted to concrete over a wide area via the reinforcing iron plate. As a result, the anchoring force of the anchor end bent portion of the main beam of the beam increases.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment shown in FIGS. 1 and 2 in which the present invention is applied to an anchoring reinforcement device for a beam main reinforcement at a joint between an external column A and a beam B will be described below. Reference numeral 1 denotes a beam main reinforcement, reference numeral 2 denotes a fixed end bent portion of the beam main reinforcement, and reference numeral 3 denotes a column main reinforcement. Reference numeral 4 denotes an arc-shaped anchoring reinforcing iron plate formed by bending an iron plate or cutting a steel pipe so as to have the same curvature as the inner diameter of the anchoring end bent portion 2 of the beam main reinforcing bar. Mounting holes 5 are formed at intervals. (See FIG. 3) Thus, the fixing reinforcing iron plate 4 is attached along the inner peripheral surface of each fixing end bent portion 2 of the beam main reinforcement 1 for one step, and is connected by the binding wire 6 inserted into the mounting hole 5. Each beam main bar 1 is fixed.

In the embodiment shown in the drawings, the pull-out force P is transmitted to the reinforcing reinforcing iron plate 4 as the compressive force p when the pull-out force P acts on the beam main bar 1 due to the seismic force. The concrete c acts on a large area via the identification reinforcing iron plate 4 and the force concentrated on the concrete does not work, thereby preventing local crushing of the concrete. (See FIGS. 4 and 5)

[0009]

According to the present invention, as described above, an arc-shaped fixing reinforcing reinforcing bar having the same curvature as the inside diameter of the bent portion is attached to each fixed end bent portion of the beam main bar for one step. In addition, the fixing force of the main beam of the beam increases due to the fixation, and even when it is difficult to sufficiently secure the fixing length of the main beam of the beam, the fixing force can be increased.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a fixing device for reinforcing a fixing end of a beam main bar according to the present invention.

FIG. 2 is a cross-sectional plan view of FIG.

FIG. 3 is a perspective view of a fixing reinforcing iron plate.

FIG. 4 is a cross-sectional plan view for explaining the operation of the anchoring end reinforcing device of the beam main reinforcing bar according to the present invention.

FIG. 5 is a cross-sectional view of FIG.

FIG. 6 is a cross-sectional plan view for explaining the operation of the conventional device.

FIG. 7 is a longitudinal sectional view of FIG.

FIG. 8 is an operation explanatory view of an anchoring end of a beam main bar at an outer column / beam joint.

[Explanation of symbols]

 Reference Signs List A external column B beam 1 beam main reinforcement 2 anchoring end bent part of beam main reinforcement 3 column main reinforcement 4 anchoring reinforcing iron plate 5 mounting hole 6 binding wire

Claims (1)

(57) [Claims] 1. An arc-shaped fixing reinforcing iron plate having the same curvature as the inner diameter of a fixing end bent portion of a beam main reinforcing bar is attached and fixed to each fixing end bent portion of a beam main reinforcing bar for one step. An anchoring end reinforcing device for a beam main reinforcing bar, characterized in that: