JPS628245Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the structure of a joint between a reinforced concrete column and a steel beam in a building, particularly at the joint between a column and a beam.

When columns in a rigid frame structure are made of reinforced concrete or steel-framed reinforced concrete, the beams spanning the pillars are generally made of reinforced concrete. However, this beam part required a lot of time and effort for formwork work during construction, and the overall weight of the frame was heavy.

This idea was devised to deal with the above-mentioned difficulties with the conventional method, and it involves a structure in which steel beams are connected to reinforced concrete columns.The purpose of this idea is to reduce the weight of the building frame, and to simplify and save labor on site work. The aim is to provide products that can be expected to shorten the construction period and reduce costs by reducing the amount of formwork.

The following will explain the embodiments shown in the drawings. 1st
Figures 2 and 2 show the first embodiment of this invention, where 1 is a column and 2 is a beam.The column 1 is made of reinforced concrete, and the beam 2 is made of steel such as H-beam. It's summery. And the beam material 2 is the joint hardware 3
It consists of a structure in which it is connected to the pillar 1 via.

The joint hardware 3 is made by welding two flange plates 3a and a web plate 3b in advance at a factory, and the flange plates 3a have arcuate corners.
The two flange plates 3a are formed in a cross shape with a circular notch 3a' in the center.
are arranged horizontally so as to maintain the same height spacing as the beam length of the beam members 2 to be joined, and the web plates of the beam members 2 to be joined from the center line of each arm piece 3a'' between the flange plates 3a. A web plate 3b is provided vertically at a position shifted by the thickness part of 2a except for the notch 3a', and has an H-shaped cross section, and each of the web plates 3b facing in four directions protrudes slightly longer than the flange plate 3a. , and serves as a beam attachment portion 3b'.

The above-mentioned joint hardware 3 is arranged so that its center is located at the center of the column 1, and the main reinforcement 7 of the column is arranged to penetrate between the arms 3'' of the joint hardware 3.Joint hardware 3 flange plate 3a and web plate 3
b is welded to the flange plate 3a, and a stud bolt 4 is driven into the flange plate 3a to transmit the shear force of the column to the joint. The tip of each web plate 3b arranged in a cross shape is connected to a beam 2 made of H-shaped steel by a high-tensile bolt 5 at a beam attachment portion 3b'.

FIGS. 3 and 4 show a second embodiment. In this embodiment, each of the web plates 3b of the joint hardware 3 extends to the center notch 3a' and is welded to each other at the center.

Figures 5 and 6 show the third embodiment,
In this embodiment, the joint hardware 3 is such that the steel pipe 6 in the height direction straddles between the center notch 3a' of the upper and lower flange plates 3a and 3a.
They are fixed to protrude above and below a and 3a. The upper and lower protruding portions of the steel pipe 6 are buried within the joint end surface of the column 1 to resist horizontal shearing force.

As mentioned above, instead of the conventional method of straddling reinforced concrete beams between the columns of reinforced concrete construction, this idea spans steel beams via joint metal fittings in which flange plates and web plates are welded in advance at the factory. This makes it possible to achieve economical design by reducing the weight of the frame, and it also has design advantages such as reducing the labor required for design because it is easy to standardize. Since reinforcement is placed through the flanges, it is easy to construct columns and attach joint metal fittings to the columns, and since steel beams are attached to joint metal fittings without using splinters, beam installation is also easy. It is possible to reduce the need for formwork, and since the joints are made using factory-produced joint metal fittings, it is expected that on-site work will be simplified and the construction period shortened, resulting in significant labor savings. In particular, the joint hardware is light because each arm of the flange plate has an elongated rectangular shape with a circular hole in the center, making it easy to handle during construction. Sufficient spacing is provided to allow easy reinforcing.

[Brief explanation of the drawing]

The drawings show embodiments of this invention; Fig. 1 is a plan view of the first embodiment, Fig. 2 is a partial front view in longitudinal section, Fig. 3 is a plan view of the second embodiment, and Fig. FIG. 5 is a plan view of the third embodiment, and FIG. 6 is a partially longitudinal front view thereof. 1... Column, 2... Beam material, 3... Joint hardware, 4
...Studded bolt, 5...High tension bolt, 6...
...Steel pipe, 7...Main reinforcement.

Claims (1)

[Scope of utility model registration request] In a building consisting of reinforced concrete columns, an elongated rectangular arm is formed protruding from the center in the direction of the beam, and a circular hole is provided in the center, and the arm of the lower flange plate is perpendicular to this. None A web plate with a height approximately equal to the beam length is installed at a position shifted by the thickness of the web plate of the beam material to be joined and fixed by welding, and the web plate is made to protrude slightly longer than each flange plate. A steel beam is straddled between the columns via joint metal fittings which are used as beam attachment parts and stud bolts are protruded from the upper and lower surfaces of the upper and lower flange plates, and the main reinforcement of the columns is the jointed material. A joint structure between a reinforced concrete column and a steel beam, characterized by reinforcement passing through the arms of the upper and lower flanges of the metal fittings.