JPH0443521Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a joint structure between a reinforced concrete column and a steel beam.

[Conventional technology]

Connections between reinforced concrete columns and steel beams tend to involve complicated details because they are made of completely different materials, and are generally done using joining hardware.

[Problem that the invention attempts to solve]

However, due to the shape of the metal fittings, processing and manufacturing are complicated, so joining with the metal fittings is troublesome. In particular, when joining steel beams to the four sides of a reinforced concrete column, the shape of the joining hardware becomes extremely complex, and the processing and shear reinforcement arrangement are troublesome, making construction difficult. Furthermore, the more complex the shape of the metal fittings, the lower the circumference of the concrete, which makes the integration of the metal fittings and the concrete significantly worse, and the disadvantage is that the rigidity of the beam joints of reinforced concrete columns cannot be increased as much as expected. It was hot.

This idea was proposed to solve the above-mentioned conventional problems, and when joining steel beams to the four sides of a reinforced concrete column, there is no need for any complicatedly shaped joining hardware, and the beam joint The purpose of the present invention is to provide a joint structure between reinforced concrete columns and steel beams that can be joined extremely easily while maintaining high rigidity.

[Means for solving problems]

This idea is based on a steel beam that penetrates the beam joint of a reinforced concrete column, and a steel beam that has a joint plate provided at the end in a direction perpendicular to the steel beam, and penetrates the concrete at the column and beam joint. The joining plates are butted on both sides of the steel beam, the joining plates are provided protruding above and below the steel beam that has passed through the beam joint, and high-strength bolts are inserted between the joining plates to join them. The goal is to achieve the following.

〔Example〕

Hereinafter, this invention will be explained with reference to an embodiment shown in the drawings.The steel beam 2 extends horizontally in the drawing on four sides of the column-beam joint of a reinforced concrete column 1, and penetrates the column-beam joint. 2 (hereinafter referred to as steel beams 2, 2 in the X direction), and steel beams 3, 3 in a direction perpendicular to the steel beams extending in the vertical direction in the drawing.
(hereinafter referred to as steel beams 3, 3 in the Y direction) are respectively joined.

The steel beams 3, 3 in the Y direction are formed from a single steel frame with an H-shaped cross section, and are connected to the column-beam joint of the reinforced concrete column 1 by horizontally penetrating the concrete 4 in this part. .

Further, the steel beams 2, 2 in the X direction are formed from steel beams with separate left and right H-shaped cross sections, and are butted against both sides of the steel beam 3 in the Y direction in the concrete 4 at the column-beam joint.

Joint plates 5, 5 are welded to the ends of the butt beams of the left and right steel beams 2, 2.

The joining plates 5, 5 have upper and lower flanges 2 at the tips of the upper and lower flanges 2a, 2a of the left and right steel beams 2, 2.
A, 2a are welded to protrude perpendicularly to the outside thereof, and reinforcing ribs 6, 6 are welded to the back side thereof.

The joining plates 5, 5 have a plurality of bolt holes 7,
7 is formed.

Then, the left and right steel beams 2, 2 abut the joint plates 5, 5 on both sides of the steel beam 3 with the liner plates 8, 8 interposed, and a plurality of bolt holes 7, 7 of the joint plates 5, 5 are inserted. They are joined by inserting and tightening high-strength bolts 9, 9.

Furthermore, shear reinforcing metal fittings 10, 10 are attached to the four sides of the beam joint of the reinforced concrete column 1, and the four sides of the beam joint are completely covered and reinforced by the shear reinforcing metal fittings.

The shear reinforcing hardware 10 is formed by bending a single steel plate into an L-shape, and its both ends are attached to stiffeners 11, 11 welded between the upper and lower flanges of the steel beams 2, 3, and a plurality of bolts 12, 1.
It is fixed by bolting with 2.

In this configuration, the construction method will be explained next.

(1) First, the main column reinforcements 13, 13 are erected, and the steel column forms 14, 14 are erected around them. After adjusting the verticality of the column forms 14, 14, the four circumferences thereof are firmly fixed.

(2) Next, of the steel beams 2, 2 in the X direction, the right steel beam 2 is installed on the column formwork 14.

(3) At this time, the lower high-strength bolt 9 is inserted into the bolt hole of the joining plate 5 in advance.

(4) Next, install the steel beam 3 in the Y direction on top of the column formwork 14.

(5) Next, install the left steel beam 2 on the column formwork 14 and tighten the lower high-strength bolts 9.

(6) Next, the upper high-strength bolt 9 is inserted into the bolt holes 7, 7 of the left and right joining plates 5, 5, and the liner plate 8 is interposed between the steel beams 3 and 2, and then tightened.

(7) Next, the column prefabricated reinforcements 13 are added to connect the upper and lower column prefabricated reinforcements 13, 13.

(8) Next, attach the shear reinforcing hardware 10, 10.

(9) Next, lay the floor deck plate and connect it to steel beams 2 and 3.

(10) Next, arrange the floor reinforcement.

(11) Next, concrete is poured into the pillars and floor areas, and after the concrete hardens, the pillar forms 14 are removed.

[Effect of idea]

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

Connect the steel beams in the direction perpendicular to the steel beams that penetrate the beam joints of reinforced concrete columns by inserting high-strength bolts between the connection plates that protrude above and below the steel beams at the ends of the beams. Therefore, steel frame joints can be constructed extremely easily.

In addition, since no complicatedly shaped joining hardware is used at the steel frame joint, the concrete at the beam joint is extremely well-circulated, allowing for complete integration between the concrete and the steel beam, and significantly increasing the rigidity of the column/beam joint. .

[Brief explanation of the drawing]

Figures 1 to 4 show an example of this invention. Figure 1 is a horizontal sectional view of a beam joint showing the state of connection between a reinforced concrete column and a steel beam, and Figure 2 is a vertical sectional view of the joint. 3 and 4 are perspective views of the shear reinforcing hardware and liner plate. 1... Reinforced concrete column, 2, 3... Steel beam, 4... Concrete, 5... Connection plate,
6... Reinforcement rib, 7... Bolt hole, 8... Liner plate, 9... High strength bolt, 10... Shear reinforcement hardware, 11... Stiffener, 12... Bolt,
13... Column prefabricated reinforcement, 14... Column formwork.

Claims (1)

[Scope of utility model registration request] A steel beam 3 that has passed through the beam joint of a reinforced concrete column 1 and a steel beam 2 that has a joint plate 5 provided at the end in a direction perpendicular to the steel beam 3 are inserted into the concrete at the column and beam joint. The joining plates 5 are abutted against both sides of the steel beam 3 which has been connected, and the joining plates 5 are provided protruding above and below the steel beam 3 that has passed through the beam joint, and high-strength bolts 9 are inserted between the joining plates 5. A joint structure between a reinforced concrete column and a steel beam, which is characterized by being inserted and connected.