JPH0424495B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a joint structure between a steel column and a beam.

[Problem to be solved by the invention]

At the joint between a column and a beam in a conventional steel structure, H
To reinforce the parts of columns made of section steel where out-of-plane concentrated forces act, reinforcing plates with surfaces perpendicular to the flange and web surfaces of the H section steel are inserted into the grooves of the H section steel.
A structure fixed by welding, that is, a structure provided with a welded stiffener, is often used.

However, the above structure requires a stiffener plate cutting and welding process. Furthermore, welding requires a large number of man-hours because the welding directions are diverse and complicated, and the welding is performed in a narrow area. Also, the location where the stiffener is attached is structurally important and must have sufficient strength, but it is easily susceptible to defects because it is welded. Furthermore, the pillar
At beam joints, many weld lines are adjacent to each other, and many welds are performed under highly restrictive conditions, which may lead to accidents such as weld cracks.

In order to overcome the drawbacks of the conventional structure, Japanese Patent Publication No. 56-41778 discloses a structure in which a column reinforcing H-shaped joint fitting is fixed between the flanges of a column made of H-shaped steel.

This invention provides a column-to-beam joint structure that is an extension of the invention disclosed in the above-mentioned publication.

[Structure of the Invention] This invention overlaps the flanges of the H-shaped steel for reinforcing upper and lower columns between the flanges of the H-shaped steel for reinforcing columns, and The web and the web edge of the H-shaped steel of the column are fixed with bolts at predetermined intervals vertically via L-shaped joints, and the H-shaped joint metal fittings for beam connection are attached to the webs of the H-shaped joint metal fittings for reinforcing the upper and lower columns. This is a joining structure for steel members in which flanges are overlapped and fixed with bolts, and a steel beam is connected to this H-shaped joint fitting for joining the beam.

〔Example〕

The details will be explained with reference to illustrated embodiments.

As shown in FIG.
It is made of steel or cast steel, and is inserted between the grooves or flanges of the H-shaped steel 2 that will become the column, and fixed by bolting. The L-shaped joint 3 is used as necessary to integrate the column reinforcing H-shaped joint 1 and the web of the H-beam 2. The filler 4 is a flange inner dimension error of the H-shaped steel 2 and an H-shaped joint fitting 1 for column reinforcement.
This is to absorb the flange parallelism error. Note that if the accuracy of the flange parallelism and height h of the H-shaped joint fitting 1 for column reinforcement is increased, the actual error in the internal dimensions of the flange of the H-beam 2 will be 1 mm or less, so the bolts can be tightened without using the filler 4. By tightening, the flange of the column reinforcing H-shaped joint fitting 1 and the flange of the H-shaped steel 2 are brought into close contact with each other, and a sufficient joining effect can be obtained. In this case, the distance between the flanges of the H-section steel 2 will shrink by about 1 mm, but this amount is not much different from the amount of shrinkage in the case of welding reinforcement and does not cause any particular problem.

Figures 2, 3, and 4 show the joint structure of a column and beam according to the present invention.
The H-shaped joint fitting 1 for column reinforcement is placed between the flanges of the H-shaped joint fitting 1 for column reinforcement, and the flanges of the H-shaped steel 2 are overlapped, and the web of the H-shaped joint fitting 1 for column reinforcement and the H-shaped steel 2 are overlapped. The webs are fixed at predetermined intervals vertically by bolts via L-shaped joint fittings 3. Between the webs of the upper and lower set of column reinforcing H-type joint fittings 1 of the column-beam joint, there is further a beam-joining H-type joint fitting 1.
This figure shows a structure in which flanges 1 are stacked and assembled and used to connect a beam 5 or an auxiliary member such as a brace.

In Figure 2, one side of the L-shaped connecting fitting 3 is divided, and an H-shaped connecting fitting 11 for beam joining is fixed vertically between the upper and lower column reinforcing H-shaped connecting fittings 1, 1, and this H-shaped connecting fitting for beam joining A beam 5 is connected to a metal fitting 11. In this case, the beam 5, the upper end level of the other direction beam 5', and the beam connecting H
The upper end levels of the shaped joint fittings 11 can be aligned. Note that the reference numeral 6 is a T-shaped joint.

In Fig. 3, the L-shaped joint 3 is not divided, and the H-shaped joint 11 for beam joining, which is connected to the beam 5' in the other direction, is placed between the upper and lower L-shaped joints 3, 3, and joined together. be.

Figure 4 shows the brace 7 coupled to the H-shaped joint fitting 11 for beam joining.The left side of the drawing shows the case where the brace 7 is directly coupled to the H-shaped joint fitting 11 for beam joining, and the right side shows the gusset plate and A case is shown in which the H-shaped joint fitting 11 and the brace 7 are connected with a splice plate interposed therebetween.

〔Effect of the invention〕

This invention has the above-mentioned structure, and provides an H-shaped joint fitting for column reinforcement that can be bolted to stiffen the joint between a column and a beam using H-shaped steel, where out-of-plane concentrated loads act. Its use eliminates the defects that occur with conventional welded-on stiffeners. Moreover, compared to oriented H-beam steel,
By arranging the H-shaped joint fittings for beam joining between the H-shaped joining fittings for reinforcing the upper and lower columns, steel beams in two directions can be joined smoothly.

In addition, by making the joint fittings for reinforcing the column H-shaped and fixing them vertically at a predetermined interval, the bending moment is dispersed and the load transmission performance is excellent. In addition, split tees etc. are used to connect columns and beams.
When using shaped metal fittings, this H-shaped joint fitting for column reinforcement can be bolted together, making it easy to construct.
Furthermore, in terms of strength, the column reinforcing H-shaped joint fittings and the beam joining H-shaped fittings overlap with each other at flanges for the H-shaped steel serving as the column, thereby ensuring reliable reinforcement of the beam joint.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of the components of this invention, Figures 2A and B and Figures 3A and B are elevational views of the joint between the column and the two-way beam, and Figure 4 is the column to which the brace is attached. FIG. 3 is an elevational view of a beam joint. 1... H-shaped joint metal fitting for column reinforcement, 2... H-shaped steel,
3... L-shaped joint fitting, 4... Filler, 5, 5'
...Beam, 6...Joint, 7...Brace, 11...
H-shaped joint fittings for beam joints.

Claims (1)

[Claims] 1 Place the upper and lower column reinforcing H-shaped joint fittings 1 between the flanges of the H-shaped steels 2 that will become columns, overlap the flanges of the column reinforcing H-shaped fittings 1 and the flanges of the H-shaped steel 2 of the column to reinforce the column. The web of the H-shaped joint fitting 1 for reinforcing the column and the web of the H-shaped steel 2 of the column are fixed with bolts at a predetermined distance above and below via the L-shaped fitting 3, and the web of the H-shaped joining fitting 1 for reinforcing the upper and lower columns is fixed. This joint structure of steel members is characterized in that flanges of H-shaped joint fittings 11 for beam joining are overlapped and fixed with bolts, and a steel beam is connected to the H-shaped joining fittings 11 for beam joining.