JPS61225438A - Joint of pillar and beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of application in the paddle industry] The present invention relates to a shiguchi used in the joints of beams of buildings.

``Conventional technology'' When constructing a steel frame building or a steel-framed reinforced concrete building, the framework of the building is constructed by attaching the end of the beam steel frame to a multi-story steel frame. It is generally formed by joining by hand, such as welding.

By the way, in recent years, in the above-mentioned buildings, the joint between the steel frame and the steel beam for the beam, that is, the joint part, often has a complicated shape due to the planar shape, cross-sectional shape, or design constraints of the building. .

For example, as shown in Fig. 22, when beams 1 and 2 made of H-shaped steel are connected to box column a with a difference in level, each of the 7 rungs of beams 2 and b is C.
A reinforcing diaphragm d is placed at the position where... is joined.
・It is shaped so that it can be attached over two stages.

Also, as shown in Figure @23, pillar a on the upper and lower floors of the joint section,
If the cross-sectional dimensions of a are different, the cross-sectional dimension of the column is reduced by the plate e at the joint part, and in addition, in steel-framed reinforced concrete construction, as shown in Fig. 2 ψ, the beam is When b produces a centering f'L, the column steel frame f is shaped so that each beam b can be joined.

Conventionally, the shape of the joint part as described above is generally formed by processing the joint part each time the steel frame for a column is manufactured.

[Points to be solved by the invention] However, as mentioned above, when manufacturing a column steel frame by processing the joint part into a complicated shape, the cost naturally increases and the manufacturing process takes a long time. The problem is that it takes a long time. Also, once this column has been manufactured, it is impossible to make any design changes, such as changing the beam structure or beam position, even if the structural strength calculation is within the allowable limits. There is a problem with that.

In addition, it is known that circular cross-sectional shapes of pillars generally have higher strength than square ones, and that cylindrical pillars have advantages such as requiring less reinforcement even in the joint section. However, when a cylinder is used, there is a problem in that it is necessary to curve the end of the beam connected to the cylinder, making the joint even more complicated. For this reason, there is a need for a means that can effectively take advantage of the advantages of the cylinder without complicating the shape of the joint.

This invention was created in view of the above circumstances, and aims to simplify the joints of columns and beams, making steel frame fabrication inexpensive and quick, and making it possible to adapt to changes in installation. Furthermore, the purpose is to provide a joint for columns and beams that can take advantage of the advantages of columns in terms of strength.

``Means for Solving the Problems'' The present invention is characterized in that the horizontal cross-sectional profile is formed into a polygon by the steel material, and a hollow portion with a circular horizontal cross-sectional profile is formed along the vertical axis. That's what happens.

"Embodiments" Examples of the present invention will be described below with reference to FIGS. 1 to 21.

First of all, Figures 1 to W43 show the Shiguchi l of this embodiment,
Steel columns 2, 2 and steel frame 4! :8... indicates a state in which n junctions are made.

As shown in Fig. 9, this joint is made of steel and has a square horizontal cross-sectional outline, and a hollow section with a circular horizontal cross-section is formed in the center along the vertical axis. It is something. Both upper and lower end surfaces 5a1 of this joint 1
The dimension of 5b is slightly larger than the outer dimension of the pillar 2, and the height dimension of its side surface 6 is slightly larger than the beam size of the beam 8. Further, the inner diameter of the hollow @S4 may be determined as appropriate, but it is desirable that the thickness between the side surface 6 and the inner surface of the hollow portion be approximately 20 mm to 20 mm at the thinnest portion.

The above-mentioned Shiguchi l is made by cutting a steel bar having a circular hollow part manufactured by rolling etc. to a predetermined length as shown in the broken line in the figure, as shown in Fig. 5. Easy to form.

As described above, the joint 1 formed as described above is made of hollow rectangular steel pipes on both upper and lower end surfaces 5a, 5b.
2 (so-called box columns) are welded together, and a beam 8 made of H-beam steel is welded to surface 6..., and this specification is used. Pillar 2 through mouth l. By joining the beams 8 to each other, the frame of a steel-framed building is constructed.

The procedure for constructing the frame of a building using this Shiguchi 1 will be explained with reference to Fig. 6. First, the pillars 2 are welded and joined to the Shiguchi 1 in a factory, and the joints of the columns for a predetermined number of floors are Form. This section is brought to the site and erected at a predetermined position as shown in Figure 6 (a) (Figure 6 shows the case where 8 floors are made up of one section). Then, as shown in FIG. 6(b), the ends of the beams 8 are directly welded and joined to each n of the joint l.

Subsequently, although not shown, a similarly formed knot is added to the uppermost joint l of the erected knot, and the same procedure is repeated to construct all the frames.

Alternatively, as shown in Figure 7 (a), the Hfi steel that will become the end of the beam 8 is welded in advance to the joint lvc, and as shown in Figure 7 (b), the H-shaped steel and the beam 8 are The ends may be joined using high tension bolts.

In this way, by using this joint 1, it becomes possible to easily join the cross section 2 and the beam 8 via this joint 1.

And this joint l is formed by a hollow part with a circular cross section.
Therefore, although the external shape is square, it also has cylindrical elements, and the load applied to the beam 3K can be smoothly transmitted to the pillar 2 by the link of this shiiguchi 1 and the arch effect. Reinforcing materials such as diaphragms, which are necessary at the joints of conventional square cross-section box columns, are uncomfortable.

In addition, by using this Shiguchi if, conventionally double, S
It is possible to simplify the joint part, which has a difficult shape and is difficult to process. For example, as shown in FIG.
Furthermore, even if the beams 8, 8 have a misalignment n as shown in the figure, this can be freely accommodated within the width dimension of the shingle 1. Sara K, as shown in Figure 1O, the upper and lower pillars 2 of Shiguchi 1
Even if the cross-sectional dimensions of ゜2a are different (when narrowing down the upper floor), it can be accommodated freely as long as the lower end of the column 2 does not overlap the outline of the hollow part 4 (in this case, the hollow part can be adjusted as needed). It is best to use a small-diameter joint L). Additionally,
As shown in FIG. 11, the upper pillar 2 of the joint 1 may be a box pillar with a square cross section, and the lower pillar 2b of the joint 1 may be a box pillar with a circular cross section.

Furthermore, by using this joint tt, the beam 8 connected to the joint i as described above can be joined at an appropriate position within the range of the side surface 6 of the joint 1, which improves the structure. It is also possible to accommodate beam design decentering within the allowable limits for strength calculations.

Above, we have explained how to use this shingle l to construct the frame of a steel-framed building, and next we will explain other ways to use it.

Figures 12 to 144 show fIi when Shiguchi 1 is used when constructing the frame of a steel-framed reinforced concrete building. , 7 and liang... are shown joined to the shikiguchi l. When joining these steel frames 7, 7 to the joint L, this steel frame? , 7's flanges 7a... are welded to both upper and lower end surfaces 5a+5b of the joint l, and the webs 7a...
Insert b into the hollow part 4 to a predetermined length and press the web? b and the inner surface of the hollow part 4 are welded together (see the first step).

After that, as in the case of the steel frame structure described above, the beams 8... are joined to the joint l, and these steel frames are connected to each other. By attaching reinforcing bars around the beams 3 and pouring concrete around them, a steel-reinforced concrete frame is constructed.

Incidentally, Figures 1F and 1F show an example of constructing a frame of a reinforced steel-frame composite structure in which the columns are made of reinforced concrete and the beams are made of steel, using a joint l. In this case, among the main column reinforcements 8..., some of the corner main reinforcements 8a...
... are connected to the holes 9 formed in both the upper and lower end surfaces 5a15b of the joint 1 by means of screws or adhesive, and the column main reinforcements 8b in the intermediate part are connected to the hollow holes 9 of the joint 1. (See Fig. 17). After that, beam 8 in the joint l.
. . are joined together and concrete is poured around the periphery 2 of the column main reinforcements 8 .

Next, Figs. 1g to 21 show a filling '44 in which concrete is filled into the interior of the steel pipe IO using a joint l.
An example of constructing the framework of a pipe concrete structure is shown below. In this case, the living room pipe ■0 is made of steel with the same cross-sectional shape as the joint l (see the mr diagram), and this steel pipe 10
The diameter of the hollow part 11 and the diameter of the hollow part 4 of the joint l are made the same size, and the pipe 10 and the joint l are welded, and their hollow st
t, 41 will be filled with concrete. Incidentally, the pipe 10 may of course be a general steel pipe with a circular cross section.

Above, steel reinforced concrete construction, reinforced steel composite structure,
We have explained how to use Shiguchi 1 in the case of a filled steel pipe concrete structure, but in the case of Izun, the framework can be easily constructed using the same procedure as in the case of the steel structure described above, and the joint part has a complicated shape. In addition, it is possible to respond to design changes, and furthermore, a simple joint portion can be constructed without the need for reinforcing materials such as a diaphragm.

Although the embodiments of the present invention and the method of using the same have been described above, the present invention is not limited to the above-mentioned embodiments. The shape of the Shiguchi may be a regular octagon as shown in Figure 927, or if the planar shape of the building is irregular and the beams do not intersect at right angles at the Shiguchi, the horizontal cross-sectional shape of the Shiguchi may be The beam may be deformed depending on the extending direction of the beam, or when joining diagonal columns (columns tilted with respect to the vertical direction), the upper end surface of the shikigu (the lower end surface of the bridge) may be It may be inclined with respect to the horizontal plane.

It should be noted that the horizontal cross-sectional contour of the hollow part of the Shiguchi is not necessarily a perfect circle, but may be slightly deformed, for example, the til of the Shiguchi.
The inner thickness at the center of one surface may be increased.

In addition, in the method of using the Shiguchi explained above, the beam connected to the Shiguchi was made of H-shaped steel. Of course it's good. In addition,
If this shiguchi is attached to the top of a pillar on the top kth floor of a building, of course there is no need for a pillar at the top of the shiguchi, and if it is attached to a pillar that is in contact with the outer wall of the building. If the beam is attached to a pillar at a corner of a building, the beam may be joined only in two directions in an L-shape.

``Effects of the Invention'' As explained in detail above, the shisha of the present invention has a polygonal horizontal cross-sectional profile made of steel, so that
By using cylinders on both the top and bottom ends and seven beams on the sides, the framework of the building can be easily constructed, and the joint section can be constructed without the need for complicated processing. This has the effect that steel frame fabrication can be carried out at low cost and in a short period of time. In addition, since the horizontal WT surface contour of the joint of this invention forms a circular hollow S, it has the same strength as that using a cylinder, and does not require reinforcing material such as a diaphragm. Effects such as being able to further simplify t-
have

[Brief explanation of drawings]

1 to 21 are diagrams showing embodiments of the present invention. Figures 1 to 3 show columns and beams of a steel-framed building connected to the joint of this embodiment, Figure 1 is a perspective view thereof, Figure 2 is a plan sectional view, Figure 3 is a plan view of the location. The t4μ diagram is a perspective view showing the shape of this joint. FIG. J is a perspective view illustrating a method of manufacturing this shiguchi. Fig. f46 and Fig. 7 are diagrams explaining the procedure for constructing the framework of a steel-framed building using this joint. 6th
Figure 6 (a) is an elevational view showing the state in which the pillars joined by the joint are in an upright position, and Figure 6 (b) is an elevation view showing the state in which the beam is welded to the joint. Figure 7 is a diagram showing other steps, of which (a) is a state where the pillar with the end of the beam attached to the joint is erected, and (b) is a state where the beam is joined with high tension bolts. Figures 3 to 1, which are elevation views showing the respective states, show the state in which columns and beams are joined to the shikiguchi, and Figure 3 shows the state in which the beams are joined with a difference in level. Fig. 1 is a plan view showing the case where the beams are joined out of alignment; Fig. 1Q is the plan view showing the case where the columns are joined together for a while; Fig. 1/Fig. 1 is a plan sectional view showing a column having a rectangular cross section and a circular cross section having n-joints on both upper and lower end surfaces, respectively. Figure WJ12 to Figure 1 ψ show the state in which columns and beams of a steel-framed reinforced concrete building are connected to the joint of this embodiment, Figure 1 is a perspective view thereof, and Figure 13 is a plan cross section. Figure 1 ψ is a plan view of the location. The first diagram to the first diagram shows that the reinforcing bars and beams of a reinforced steel-frame composite building are connected to the joint of this embodiment.
1 is a perspective view, FIG. 16 is a plan sectional view, and FIG. 17 is a plan view of the location. Figures 11 to 20 show the state in which residential steel pipes and beams of a building made of filled steel pipe concrete are joined to the joint of this embodiment; Figure 1 is a perspective view thereof, and Figure 19 is a The plan sectional view and FIG. 20 are location views. FIG. 21 is a perspective view showing another shape of the joint. Figures 22 to 2φ are diagrams showing the shape of a conventional joint part, and Figure 22 is an elevation view showing the case where the beam is joined to the column f' with a level difference t, and Figure 2 Figure 23 is an elevational view showing the column when it is compressed, and Figure 2ψ is a plan sectional view showing the cross-sectional shape of the column when the beams are joined with their centers offset. [... Shiguchi, 2... Living, 8...
・Beam, 4...Hollow part. Figure 1 Figure 2 Figure 8 Figure 4 Figure 8 Figure 9 Figure 10 Figure 11 Figure 6 (A) Figure 18 Figure 19 Figure 20 Figure 22 Figure 24

Claims (1)

[Claims] This is a joint between columns and beams in which columns are joined in the vertical direction and beams are joined in the horizontal direction. A joint for pillars and beams, characterized in that a hollow part with a circular horizontal cross-sectional profile is formed along the axis.