JPH01322044A - Joint structure of closed type sectional stay and beam main reinforcement - Google Patents

Abstract

PURPOSE:To surely transmit the stress of a beam main reinforcement onto a stay by surely fixing the edge part of the beam main reinforcement onto the stay by screwing the beam main reinforcement onto a beam main reinforcement joint nut and connecting the beam main reinforcements by a tie bolt. CONSTITUTION:A beam main reinforcement joint nut 6 is installed inside a beam joint metalware 3 by screwing a male screw part 6a formed on one edge part into a tapped hole 5. The beam joint metalware 3 is connected by a tie bolt 7, and the main reinforcement 4 of the beam 2 on the both sides of a stay 1 is connected by the tie bolt 7. Further, a joint bolt 8 is projectingly installed by screwing the basic edge part with the beam main reinforcement joint nut 6 on the side surface part of the beam joint part of the stay 1. The main reinforcement 4 of the beam 2 is joined at the top edge part of the joint bolt 8 by a screw type coupler 9.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a connection structure between a column made of a closed cross-section material such as a circular steel pipe or a square steel pipe, and a main beam reinforcement of a PC beam, a reinforced concrete beam, or a steel reinforced concrete beam. It is.

[Conventional technology]

In general, closed cross-section materials such as circular steel pipes and square steel pipes have no directionality such as weak or strong axes when used, so they are widely used not only in steel-framed buildings but also as columns in steel-framed concrete and steel-framed reinforced concrete structures. There is.

By the way, when a closed cross-section material such as a square steel pipe is used as a column, anchorage of the main reinforcement end of the beam becomes an important point.

Conventionally, the ends of the main reinforcement in such cases are fixed by bending the ends of the main reinforcement upward or downward along the columns, or by welding them to the columns.

[Problem to be solved by the invention]

However, in the former fixing method, it is necessary to bend the ends of the main reinforcement in advance, and therefore, when the diameter becomes thick, processing is not easy. Furthermore, if a sufficient anchorage length of the main reinforcing bars is to be ensured, the amount of reinforcing bars to be used will inevitably increase considerably.

On the other hand, in the latter fixing method, welding accuracy is greatly affected by the skill and weather of the welder, and sometimes defects in strength may occur.

Furthermore, since the wall thickness of the column is not very thick, sufficient rigidity of the column-to-beam joint cannot be ensured simply by welding the ends of the main reinforcement to the column.

This invention was proposed in order to solve the above-mentioned conventional problems, and it is possible to securely fix the end of the beam main reinforcement, to reliably transmit the stress of the beam main reinforcement to the column, and to The object of the present invention is to provide a joint structure between a closed cross-section column and a reinforced concrete column or a steel reinforced concrete beam, which can omit bending of the ends of the main reinforcement and can significantly save on the number of reinforcing bars.

[Means to solve problems]

The present invention relates to a joint structure between a column made of a closed cross-section material such as a square steel pipe and a main beam reinforcement of a reinforced concrete beam or a steel-frame reinforced concrete beam, in which a beam joint hardware is attached to the inside of the beam joint of the closed cross-section column. By attaching a beam main reinforcement joint nut to the beam joint hardware, connecting the beam main reinforcements of the reinforced concrete beam or the steel reinforced concrete beam by screwing them to the beam main reinforcement joint nut, and connecting the beam main reinforcements with each other using tie bolts, the above-mentioned method can be achieved. It accomplishes its purpose.

〔Example〕

The present invention will be explained below with reference to an illustrated embodiment.

In FIGS. 1, 2, and 3, number 1 is a column made of a square steel pipe, number 2 is a beam made of reinforced concrete, number 3 is a beam joint, and number 4 is a main reinforcement of the beam 2.

The beam joint hardware 3 is formed into a horizontally long plate shape, and both left and right ends thereof are bent into an L-shape by a predetermined length in order to increase the overall rigidity.

Further, the height and thickness of the beam joining hardware 3 are determined according to the cross-sectional size of the beams 2 to be joined.

A plurality of tapped holes 5 are formed in the beam joining hardware 3 at fixed intervals in the lateral direction, and the diameter and position of the tapped holes 5 are determined by the diameter and position of the main reinforcing bars 4 of the beam 2.

The beam joint hardware 3, 3 formed in this way has a through hole 12 of the column 1 and a screw hole 11 of the beam joint hardware 3 attached to the inside of the pillar.
Attach from the outside of the column 1 with a blind rivet 10
It is temporarily fixed by.

In such a case, the position of the beam joint hardware 3.3 is the upper main reinforcement 4 of the beam 2.
, 4 and the position of the lower end main reinforcement 4.4.

A plurality of beam main reinforcement joint nuts 6 are attached to the inside of the beam joint hardware 3.

The beam main reinforcement connecting nut 6 has a male threaded portion 6a at one end of the long nut.
The beam main reinforcement joint nut 6 is attached to the inside of the beam joint metal fitting 3 by screwing the male threaded portion 6a into the tapped hole 5.

The beam joints 3.3 are connected by tie bolts 7.7. Both ends of tie bolt 7.7 are connected to beam main reinforcement connecting nuts 6
．． 6, it is connected to the beam joint hardware 3.3. As a result, the main reinforcements 4, 4 of the beam 2.2 are connected by the tie port 7°7, and thereby the column 1 and the beam 2,
2 and between the left and right beams 2, 2 can be smoothly transmitted.

Furthermore, a joint bolt 8.8 is provided protruding from the side surface of the beam joint of the column 1.

The joint bolt 8 is attached by screwing its base end into the beam main reinforcement joint nut 6 through the through hole of the column 1.

Then, the main reinforcement 4 of the beam 2 is attached to the tip of this joint bolt 8°8.
are connected by a screw coupler 9.

Figure 5 shows both ends of the tie bolt 7.7 connected to the beam main reinforcement connecting nut 6.
．． 6 is penetrated and protrudes outward from the side of the column 1, and these protruding parts 7a, 7a are used as joints of the main reinforcement 4, and the beams 2
The main reinforcements 4, 4 are connected by a screw coupler 9.

With such a configuration, the number of joint bolts 8, 8 can be saved.

Note that the beam joint hardware 3, 3 beam main reinforcement joint nuts 6.6 and tie port 7.7 shall be installed in advance at the factory.

6 and 7 show a second embodiment of the present invention, in which the beam joint hardware 3 is formed into a rectangular ring shape one size smaller than the diameter of the column 1, and the beam main reinforcement is connected inside each side part. A nut 6 is attached.

If the beam joining hardware 3 is formed in this way, only one beam joining hardware 3 is required when joining the beams 2 in two to four directions.
As a result, the number of hardware items is reduced and work becomes easier. Moreover, the rigidity of the beam joint is further increased.

Note that the thickness and height of the beam joining hardware 3 can be changed appropriately according to the cross-sectional size of the beam 2 to be joined, and the position of the beam joining hardware 3.3 is at the position of the main reinforcements 4, 4 of the beam 2. The points that can be changed accordingly are substantially the same as the first embodiment.

Furthermore, the beam joint hardware 3 is not limited to a rectangular shape;
Depending on the cross-sectional shape of the pillar 1, it may be circular or polygonal.

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

■ The end of the beam main reinforcement is fixed by screwing into the beam main reinforcement joint nut of the beam joint hardware installed inside the beam joint of the column, so the end of the beam main reinforcement must be securely fixed to the column. I can do it.

Additionally, since there is no need to bend the ends of the main bars to secure the anchoring length, not only does extra labor become unnecessary, but the amount of reinforcing bars can be saved by eliminating the need for anchoring lengths at the ends of the main bars. .

■ Furthermore, the ends of the beam main reinforcements are fixed to the columns by screwing into the beam main reinforcement joint nuts of the beam joints installed inside the beam joints of the columns, and the beam main reinforcements are connected to each other by tie bolts. Therefore, the columns and beams and the beams have continuity in transmitting stress, and therefore, it is possible to perform an extremely rational design without any structural waste.

[Brief explanation of the drawing]

Figures 1 to 4 show a first embodiment of the present invention, in which Figure 1 is a vertical cross-section of a column-beam joint, Figure 2 is a cross-sectional view thereof, and Figure 3 is a beam joint metal fitting. FIG. 4 is an enlarged view of part A in FIG. 1, FIG. 5 is a cross-sectional view of the column-beam joint, and FIGS. 6 and 7 show a second embodiment of the invention. Something,
Figure 6 is a longitudinal cross-sectional view of a column-beam joint, Figure 7 is a perspective view thereof, Figure 8 is a cross-sectional view of a beam joint of a steel-framed reinforced concrete column, and Figure 9 is a cross-sectional view of a beam joint of a steel-framed reinforced concrete column. FIG. 1...Column, 2...Beam, 3...Beam joining hardware, 4...
・Main reinforcement, 5... Screw hole, 6... Beam main reinforcement connection nut,
7... Tie bolt, 8... Joint bolt, 9... Screw force/puller, 10... Mounting screw or blind rivet, 11.12... Beam joint hardware mounting hole.

Claims (1)

[Claims] (1) Attach a beam joint hardware to the inside of the beam joint of a closed cross-section column, attach a beam main reinforcement joint nut to the beam joint hardware, and screw the beam main reinforcement of a reinforced concrete beam or steel reinforced concrete beam into the beam main reinforcement joint nut. A joint structure of a closed cross-section column and a beam main reinforcement, characterized in that the main beam reinforcements are connected by tie bolts.