JPS6134404Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a device for joining reinforced concrete columns and steel beams.

In a building with a rigid frame structure, when columns are made of reinforced concrete or steel-framed reinforced concrete, the beams spanning the pillars are generally made of reinforced concrete or steel-framed reinforced concrete. However, in this type of building, there are problems such as the beam portion requires a lot of time and effort for formwork work during construction, and the overall weight of the frame is heavy.

For this reason, in recent years, efforts have been made to reduce the total weight of buildings by constructing columns from pure reinforced concrete and beams from pure steel frames.

However, this type of structure has the disadvantage that it is extremely difficult to completely integrate the columns and beams because they are made of completely different materials.

This idea was proposed in order to solve the above-mentioned conventional problems, and it is a device for joining reinforced concrete columns and steel beams that can connect the reinforced concrete columns and steel beams extremely easily and completely. The purpose is to provide.

This invention will be explained below with reference to illustrated embodiments.

1 and 2 show a first embodiment of this invention, in which reference numeral 1 represents a column and reference numeral 2 represents a beam.

Column 1 is made of reinforced concrete.
The beam 2 is made of an H-shaped cross-section material.
The ends are joined to a square steel pipe 4 embedded in the joint portion of the column 1 by fastening brackets 3, 3 welded respectively to the ends of the upper and lower flanges 2a, 2a of the beam 2 with a number of high-strength bolts 5, thereby becoming one with the column 1.

The square steel pipe 4 is formed to have a length slightly longer than the length of the beam 2, and both upper and lower ends protrude from the upper and lower flanges 2a, 2a of the beam 2 and are joined to the beam 2. In addition, the square steel pipe 4 is connected to the plurality of column main reinforcements 1 of the column 1.
a, and the vertically protruding portion 4 of the square steel pipe 4
a, 4a are buried so as to pierce the concrete 1b of the column 1. The square steel pipe 4 buried in this way has its upper and lower protruding parts 4a, 4a aligned with the pillar 1.
is inserted into the concrete 1b of
Column 1 and beam 2 are constrained by
At the same time, the horizontal shearing force generated at the joint between the column 1 and the beam 2 is coped with. In the embodiment, a plurality of beams 2 are arranged on the pillar 1 in a cross shape.

3 and 4 show a second embodiment of this invention, in which end plates 6, 6 welded between upper and lower flanges 2a, 2a of the beam 2 end are attached to a square steel pipe 4. It is joined to the square steel pipe 4 by fixing it with a plurality of high-strength bolts 5,
It is integrated with pillar 1.

5 and 6 show a third embodiment of this invention, in which a beam 2 end is attached to a bracket 7 welded to a square steel pipe 4, a plurality of high-strength bolts 5 and a plurality of rod plates 8. It is twisted and joined. The bracket 7 is made of H-beam steel having the same length as the beam 2. In addition, the main column reinforcements 1a of the columns 1 are arranged separately for the upper and lower floors, and the upper and lower ends are the protruding portions 4a of the square steel pipes 4.
is welded to the surrounding wall.

7 and 8 show a fourth embodiment of this invention, in which a reinforcing plate 9 is installed inside a square steel pipe 9.
The square steel pipe 9, which has a cross section of the square steel pipes 9a and 9a arranged in a cross shape, has its peripheral wall exposed to the peripheral wall of the column 1, and the main column reinforcement 1a is connected to the peripheral wall of the square steel pipe 9 and the reinforcing plate 9a. .
The flange 2a is joined to the square steel pipe 9 by fixing the end of the web 2b with a plurality of high-strength bolts 5, and by welding. The bracket 10 is formed of a plate, and is welded to the side wall of the square steel pipe 9, facing the end of the reinforcing plate 9a.

9 and 10 show a fifth embodiment of this invention, in which upper and lower horizontal plates 11, 11
and a vertical plate 12 arranged between the upper and lower horizontal plates 11, 11 and welded to the upper and lower horizontal plates 11, 11, and the steel beam 2 is fixed to a bracket 13 welded to the square steel pipe 9 side. There is. The steel beam 2 is arranged with the ends of the upper and lower flanges 2a, 2a abutting the ends of the upper and lower horizontal plates 11, 11, and the end of the web 2b abutting the end of the vertical plate 12, and supporting plates on both sides of these abutting parts. Add 14 to each, and serve with plate 14
and upper and lower horizontal plates 11, 11, upper and lower flanges 2
A, 2a, vertical plate 12, and web 1b are connected to a bracket 13 by having a plurality of high-strength bolts 5 continuously passed through them.

This idea consists of the above-mentioned structure.In contrast to conventional rigid-frame buildings, where columns and beams are made of reinforced concrete or steel-framed reinforced concrete, this idea has columns made of reinforced concrete, and a structure that straddles the columns. Since the beams are made of steel frames such as H-beams, the weight of the building can be reduced. In addition, since there is no formwork for the beams, on-site work is simplified, labor is saved, construction time is shortened, and the cost of formwork work is reduced by reducing the amount of formwork. In addition, between the columns and the beams, short square steel pipes are buried in the concrete at the joints of the columns, and the ends of the beams are connected to the square steel pipes in the concrete of the columns with multiple high-strength bolts. Therefore, it is possible to completely integrate the columns and beams, significantly increasing the rigidity of the joint, and making it extremely easy to connect the columns and beams.

[Brief explanation of the drawing]

Figures 1 to 8 show examples of this invention. Figure 1 is a plan view of the first embodiment, Figure 2 is a partial vertical sectional view thereof, and Figure 3 is a second embodiment. FIG. 4 is a plan view of the third embodiment, FIG. 4 is a plan view of the third embodiment, FIG.
8 is a plan view of the fourth embodiment, FIG. 8 is a partial longitudinal sectional view thereof, FIG. 9 is a plan view of the fifth embodiment, and FIG. 10 is a partial vertical sectional view thereof. 1... Column, 1a... Main column reinforcement, 1b... Concrete, 2... Beam, 2a... Flange, 2b... Web, 3... Bracket, 4... Square steel pipe, 4
a...Protruding part, 5...High strength bolt, 6...End plate, 7...Bracket, 8...Plate, 9...Square steel pipe, 9a...Reinforcement plate, 1
0...Bracket, 11...Horizontal plate, 1
2. Vertical plate, 13. Bracket, 1
4. Accompanying plate.

Claims (1)

[Scope of utility model registration request] This is a joining device for reinforced concrete columns and steel beams, in which a short square steel pipe is buried in the concrete at the joint part of the reinforced concrete column, and the steel beam is connected to this square steel pipe with multiple high-strength bolts. A device for joining reinforced concrete columns and steel beams.