JPH019843Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint structure between a single span beam and a column in a reinforced steel structure.

To connect a 1-span beam and a column steel frame, first suspend the beam steel frame between the columns, connect the beam steel frame to the column steel frame using a gusset plate, then pass an L-shaped anchor bar through the column steel frame, and attach the protruding end of the beam to the column steel frame. It was connected to the main beam reinforcement that had been placed in advance on the beam by lap joints or pressure welding. However, the conventional jointing process is time-consuming and troublesome, and the anchor bars must be attached to the column steel frame at a high location after construction, which poses problems such as high operational risks.

This invention was created in view of the above problems, and allows for easy joint work without the need for special tools or effort, and by pre-attaching anchor bars to the column steel frame, it is possible to perform work at high places. The purpose of the present invention is to provide a joint structure between a single span beam and a column that improves this.

The structure of the present invention is characterized by attaching a joint pipe having a threaded hole in the axial center to the tip of the L-shaped anchor bar, attaching this anchor bar to the column steel frame through the hole in advance, and attaching it to the main bar of the beam. Attach a fitting pipe with the same configuration as the above fitting pipe to the tip of the
The joint pipes on the column and beam sides are connected using a threaded rod, and the connection is fixed using two fixing nuts attached to the threaded rod.

Embodiments of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, the column steel frame (column steel frame 1 on one side)
(Only shown in the figure) A one-span beam 2 is installed between them.

By the way, the web 1a of the column steel frame 1 has a plurality of L-shaped anchor bars 3 whose rear ends are bent downward.
3... is installed. Horizontal part 3 of each anchor bar
a, 3a... are holes 1b, 1b... provided in the web 1a.
It is inserted into the beam 2 so that it can move freely in the axial direction.
protruding towards. The tip of each horizontal part 3a, 3a... of each anchor bar 3, 3... is a joint pipe 4, 4
... are fixed to each other. On the other hand, the beam 2 is a steel reinforced beam in this example.
They are connected by 0. Beam main reinforcements 7, 7... are arranged at the upper and lower square corners of the beam steel frame, and stirrups 8, 8... are wound around these beam main reinforcements. Joint pipes 9, 9... are fixed to each end portion 7a, 7a... of each beam main reinforcement 7, 7..., respectively. The beam main reinforcements 7, 7... and the anchor reinforcements 3, 3... are connected by a threaded rod 11 that connects the joint pipes 9, 4.

FIG. 3 shows the above-mentioned reinforcing bar joint, in which each of the joint pipes 4 and 9 is fitted and crimped to the tip of the horizontal part 3a of the anchor bar 3 and the tip of the end 7a of the beam main bar 7 inserted from the rear opening, respectively. Female threads 4a and 9a are provided at the front of the hollow portion, respectively, and a one-way threaded rod 11 can be inserted into and screwed into these female threads 4a and 9a. One end (right end) of this threaded rod 11 is connected to the joint pipe 4.
It is screwed in advance from the front opening of the screw rod, and two nuts 12 and 13 are screwed onto this threaded rod.
In this case, the length of the threaded rod 11 must be such that it can be screwed into the female thread 9a of the other joint pipe 9.

Beam main reinforcement 7 and anchor reinforcement 3 by this threaded rod 11
The joining process is as follows. That is, in the state shown in FIG. 3A, first the nut 13 is replaced with the nut 12.
Rotate until they are firmly connected. Therefore, both or one of nuts 12 and 13 (especially 13)
When the threaded rod 11 is rotated, the threaded rod 11 also rotates and extends to the left. If you continue this rotation work, the third
As shown in FIG. B, the threaded rod 11 is screwed into the female thread 9a of the joint pipe 9. There, Natsu 13 in the back
The joint is reversed and returned to the tip end face of the joint pipe 4, and is strongly joined to this end face (as shown by the chain line in FIG. 3B).

Both ends of this threaded rod 14 are screwed into the female threads 4b of the joint pipe 4 and the female threads 9a of the joint pipe 9, and the flange 15 is held and rotated with a tool to join the anchor reinforcement 3 and the beam main reinforcement 7. It is.

Next, the joining work between the column steel frame 1 and the beam 2 will be explained. The anchor reinforcements 3, 3... are attached in advance to the web 1a of the column steel frame 1, and the beam main reinforcements 7, 7... and stirrups 8 are assembled in advance for the beam 2, and then the erection work of the columns and beams is carried out. (1st
figure). At this time, since the joint pipe 4 is attached to the tip of the anchor bars 3, 3..., the holes 1b of the web
..., and therefore there is no need to arrange anchor reinforcement after the column 1 is erected. Then, the threaded rods 11 attached to the joint pipe 4 are advanced by nuts 12, 13, and are threadedly connected to the joint pipe 9, thereby completing the joining work.

Since the present invention has the above-mentioned configuration, the on-site joining work between the anchor reinforcement and the beam main reinforcement is simply by rotating the threaded rod, making the joining work extremely easy.
The construction period will also be shortened. According to the joint structure of the present invention, the joint part can be placed close to the web of the steel frame of the column and close to the column, so the joint part of the beam can be moved from the joint part of the main beam reinforcement and anchor reinforcement to the column, unlike conventional methods. There is no need to wind a stirrup that is different from the stirrup, and there is no problem in lowering the spiral strips of the columns. Furthermore, even if the anchor bars are attached to the steel frame of the column in advance, the joint pipe can prevent them from falling off, making it possible to erect the steel frame of the column in that state. No work is required when attaching to the steel frame of the column, and therefore work at high places can be improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a perspective view showing the state before joining a 1-span beam and a column;
Fig. 2 is a partially cutaway side view showing the state after joining, Fig. 3 A is an enlarged sectional view showing the state before the joint pipe and threaded rod are joined, and Fig. 3 B shows the state after joining. It is an enlarged sectional view. 1...Column steel frame, 1b...hole, 2...beam, 3...
Anchor bar, 3a...Horizontal part of anchor bar, 4,
9... Joint pipe, 4a, 4b, 9a... Female thread, 5... Beam steel frame, 7... Beam main reinforcement, 7a... Beam main reinforcement end, 8... Stirrup, 11... Threaded rod.

Claims (1)

[Scope of Claim for Utility Model Registration] It is installed by inserting it into the column steel frame through a hole, and 1
A joint pipe having a threaded hole in the shaft center is fitted and crimped to the tip of the end protruding toward the span beam side, and an L-shaped anchor bar whose rear end side is bent downward; A joint pipe with the same configuration as the above joint pipe is placed at the tip of the main beam reinforcement of a 1-span beam, which is positioned opposite the joint pipe on the column steel frame side and is crimped, and the joint pipe on the column side, which is located opposite, and the joint pipe on the beam side. A joint structure between a 1-span beam and a column, which includes a threaded rod that connects the joint pipe and two fixing nuts attached to the threaded rod.