JPH0213694B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint part structure that can simplify the joint part, which is the intersection of columns and beams, and reduce the cost of the structure and save labor during construction. .

Column and beam joints in conventional reinforced steel or steel-frame reinforced concrete structures are extremely complex in terms of frame construction, which inevitably increases construction costs. In more detail, there are a large number of reinforcing bars that make up the columns and reinforcing bars that make up the beams, which not only requires a lot of man-hours for arranging each of them, but also requires the reinforcing bars to be alternately combined and connected at the joint. This has the disadvantage of further increasing the number of man-hours, leading to an increase in costs. In addition, the cost of formwork for constructing the frame is considerable, and this is also a cause of high costs.

This invention was made in view of the above circumstances,
The purpose of this is to provide a structure for the Shiguchi section that can save labor when constructing the Shiguchi section, which is the intersection of columns and beams, and reduce the construction cost. The construction is made of reinforced concrete and the beam is made of H-beam steel, dowel reinforcements are fixed to this beam, and these dowel reinforcements are installed between the main reinforcements of the columns that make up the joint section. The number of crossings of the members, that is, the degree of crossing, is reduced to simplify the structure of the joint part.

The present invention will be explained below with reference to the drawings. FIG. 1 is for explaining the present invention, and shows the joint structure of a column and beam constructed according to the present invention. The feature of this invention is that the columns 1 are made of reinforced concrete as in the conventional structure, but the beams are made of steel beams 2 made of H-shaped steel. This saves the trouble of assembling and disassembling the concrete, and the trouble of concrete and pouring it.Secondly, it reduces the degree of intersection at the joint.

Column 1 and beam 2 are connected by fixing a plurality of reinforcing bars (dowel bars) 3 perpendicularly to the upper and lower flange surfaces of beam 2, and connecting these reinforcing bars 3 to the main bars 4 and tie bars that make up column 1. This is done by placing it between 5 and 5. In this state, if the formwork for the column 1 is assembled and concrete 6 is poured and solidified, the connection between the column 1 and the beam 2 is completed, and the column-beam joint can be constructed.

As described above, according to the present invention, the columns are made of reinforced concrete and the beams are made of H-shaped steel, so compared to the conventional case where both the columns and the beams are made of reinforcing bars or steel-framed reinforced concrete structures, the reinforcing bars for constructing the beams,
The cost of materials such as formwork and concrete and the labor of arranging them can be saved. Moreover, by using H-shaped steel for the beam, the number of times the members intersect in the joint part, that is, the degree of crossing of the joint part, is reduced, so the number of man-hours for constructing the joint part can be significantly reduced from this point of view as well.

As explained above, the present invention has a column-beam joint structure in which the columns are made of reinforced concrete and the beams are made of H-shaped steel. The installation process can be omitted, and the degree of intersection of the joint parts can be reduced to simplify the joint part structure, thereby saving labor and reducing costs in constructing the joint part.

In particular, according to the present invention, at the end of a beam inserted into a main reinforcing group that constitutes a column, there are a plurality of dowel reinforcements that are fixed to the upper and lower flanges of the beam and extend in the same direction as the main reinforcement. Furthermore, these dowel reinforcements are placed between the main reinforcements of the columns, so even if the joint is made of a combination of different structural materials, where the columns are reinforced concrete and the beams are steel frames, the joint is Fully reinforced. In this case, the dowel reinforcements will particularly effectively transmit stress between the columns and beams. Moreover, since the dowel reinforcements are arranged to extend in the same direction as the main reinforcing bars, the joint part can be reinforced without increasing the degree of intersection of the members at the joint part. Furthermore, even if relatively long dowel reinforcements are used, those dowel reinforcements are oriented in the same direction as the reinforcement within the main reinforcement group, so
Even if dowel reinforcements are fixed to the beam in advance, the beam with dowel reinforcements can be simply inserted and set into the main reinforcement group at the construction site, which can improve work efficiency. can.

In addition, as a simulation for strength measurement, we used a model of the joint part structure according to the first embodiment, in which the upper and lower ends of one column are fixed and a beam is horizontally connected to the center, and we performed FEM analysis (Finite Element
Method ANALYSIS) and repeated experiments on the joint section revealed that the joint section according to the present invention can sufficiently withstand the yield load of the steel beam and the large deformation of the members without collapsing. As a result, all the stress generated in the steel beams was sufficiently transmitted to the columns through the dowel reinforcements placed at the joints, and it was found that the structure was sufficiently safe against earthquakes, etc.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a column-beam joint structure showing an embodiment of the present invention. 1... Column, 2... Beam, 3... Rebar (dowel reinforcement),
4... Main bar (reinforcing bar), 5... Stir bar (reinforcing bar).

Claims (1)

[Claims] 1 The columns are made of reinforced concrete and the beams are made of H.
A joint structure of a column and beam made of shaped steel, wherein the end of the beam is inserted into a main reinforcing group constituting the column,
Moreover, a plurality of dowel reinforcements are provided at the end of the beam, which are fixed to the upper and lower flanges of the beam and extend in the same direction as the main reinforcement, and these dowel reinforcements are connected to the main reinforcement of the column. A pillar-beam joint structure characterized by being placed between the pillars and beams.