JPH03275837A - Built-in joint construction of column and beam - Google Patents

Abstract

PURPOSE:To make it possible to firmly join columns and beams by fitting horizontal circular lower projections provided to the beams into lower step joining metal fittings fixed to the upper ends of the columns, and fitting the upper joining metal fittings fixed to the lower ends of the columns to horizontal circular upper projections. CONSTITUTION:Ring-shaped projections 9 provided to the lower parts of lower step joining metal fittings 3 fitted and fixed to the upper ends of the columns 1 of circular steel pipes, and horizontal ring-shaped grooves 2 are provided around the upper parts of the lower step joining metal fittings 3. A ring-shaped projection 13 provided to the upper part of an upper step joining metal fitting 5 is fitted and fixed to the lower end of the column 1, and horizontal ring- shaped grooves 4 are provided around the lower part of the upper step joining metal fitting 5. After that, horizontal circular lower projections 7 in beam joining metal fittings 18 fixed to the ends of a plurality of beams 6 are fitted into horizontal circular grooves 2 of the upper end of the column 1. Then, horizontal circular upper projections 8 of the beam joining metal fittings 18 are fitted to the horizontal circular grooves 4 of the lower end of the column 1. According to the constitution, the columns and beams can be firmly joined.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fitting joint structure between columns and beams in buildings.

[Conventional technology]

Conventionally, the joint structure of columns and beams was as follows:
As disclosed in Publication No. 3288, a capital block is interposed between the upper and lower columns, and they are connected by a large number of bolts, and a plurality of joint plates are installed between the joint beam of the column capital block and the end of the beam. (2) As published in Japanese Utility Model Publication No. 51-48414, the entire circumference of the end of the column is fixed by welding to the upper and lower parts of the joint. A joint structure is known in which the entire circumference of the end of the beam is fixed to the side of the joined body by welding.

[Problem to be solved by the invention]

In the case of the joint structure described in (1) above, the column capital block and the upper and lower columns are connected at the construction site with a large number of bolts,
In addition, since the joint beams of the column capital blocks and the beams are connected using multiple joint plates and a large number of bolts, assembly and construction time is long. Since it is necessary to drill a large number of bolt insertion holes in the flange, there is a problem that processing is complicated and costs are high.

In addition, in the case of the joint structure described in (2) above, a welding device is brought to the construction site and the entire circumference of the end of the column is fixed to the joint body by welding, and the entire circumference of the end of the beam is fixed to the joint body. Since the beam is fixed by welding, assembly takes a long time, and the beam must be held in a predetermined position when the beam is fixed to the joint by welding, making the assembly complicated.

The object of the present invention is to provide a column-to-beam fitting joint structure that can advantageously solve the above-mentioned problems.

[Means to solve the problem]

In order to achieve the above object, in the column-beam fitting joint structure of the present invention, a horizontal annular groove 2 is provided at the upper end of the column 1, a horizontal annular groove 4 is provided at the lower end of the column 1, Beam 6
A horizontal arcuate lower protrusion 7 is provided at the lower end of the beam 6, a horizontal arcuate upper protrusion 8 is provided at the upper end of the beam 6, and a horizontal annular groove 2 at the upper end of the column 1 is provided with a horizontal arcuate upper protrusion 8. , the horizontal arc-shaped lower protrusions 7 at the ends of the plurality of beams 6 are fitted, and the horizontal annular grooves 4 at the lower ends of the pillars 1 are fitted into the horizontal arc-shaped upper protrusions 8 at the ends of each beam 6. ing.

Further, a metal lower joint fitting 3 having a horizontal annular groove 2 with a wedge-shaped cross section that expands upward is fixed to the upper end of the column 1; 4 is fixed, a horizontal arcuate lower protrusion 7 with a wedge-shaped cross section that decreases downward is provided at the lower end of the beam 6, and at the upper end of the beam 6, A horizontal arc-shaped upper protrusion 8 having a wedge-shaped cross section that contracts upward is provided, and horizontal arc-shaped lower protrusions 7 at the ends of the plurality of beams 6 are fitted into the horizontal annular groove 2 of the lower joint fitting 3. The above object can also be achieved by fitting the horizontal annular groove 4 of the upper joint fitting 5 into the horizontal arc-shaped upper protrusion 8 at the end of the beam 6.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

1 to 5 show a first embodiment of the present invention, in which an annular protrusion is provided at the upper end of a column l made of a steel pipe with a circular cross section at the lower part of a lower steel joint 3. 9 is fitted, the lower joining furniture 3 and the pillar 1 are fixed by welding, and a horizontal annular groove 2 with a wedge-shaped cross section (inverted trapezoidal cross section) expanding upward is provided around the upper part of the lower joining fitting 3. ,
Furthermore, a cross-shaped reinforcing rib 11 is provided on the horizontal plate 10 of the lower joint fitting 3, and a plurality (four in the illustrated case) of through holes 12 are provided.

Said pillar 1. An annular protrusion 13 provided on the upper part of the steel upper joining metal fitting 5 is fitted into the lower end of the upper joining metal fitting 5.
and the pillar 1 are fixed by welding, and a horizontal annular groove 4 with a wedge-shaped cross section (trapezoidal cross section) that expands downward is provided around the lower part of the upper joint metal fitting 5, and furthermore, a horizontal plate body in the upper joint metal fitting 5 is provided. 14 is provided with a cross-shaped reinforcing rib 15 and a plurality of (four in the illustrated case) through holes 16, and the horizontal annular grooves 2, 4 have approximately the same diameter as the pillar 1. , is arranged concentrically with column 1.

A horizontal arc-shaped lower protrusion 7 having a wedge-shaped cross section (inverted trapezoidal cross-section) that contracts downward is integrally connected to the lower part of the horizontal arc-shaped part 17, and a wedge-shaped cross-section that contracts upward to the upper part of the horizontal arc-shaped part 17. Horizontal arc-shaped upper protrusions 8 (with trapezoidal cross-section) are integrally connected to form a steel beam joint 18, and the quadrangular ridges 19 provided on the outer surface of the beam joint 18 are as follows:
It is fitted into the end of a steel beam 6 having a square cross section, and the beam joining fitting 18 and the beam 6 are fixed by welding.

The horizontal arc-shaped lower protrusion 7 of the beam joint fitting 18 fixed to the ends of the plurality of beams 6 is fitted into the horizontal annular groove 2 of the lower joint fitting 3 fixed to the upper end of the pillar 1 on the lower floor,
The horizontal annular groove 4 in the upper joint fitting 5 fixed to the lower end of the column 1 on the upper floor is fitted into the horizontal arc-shaped upper protrusion 8 of each beam joint fitting 18.

The angle of the horizontal arc-shaped portion 17 of the beam joint fitting 18 fixed to the end of the beam 6 is set to 90°, and when joining four beams 6 to the column l, the angle of the horizontal arc-shaped portion 17 is set at 90°. The beam joining metal fittings 18 are arranged side by side on the circumference. In addition, when joining three beams 6 to the column 1, three beam joining metal fittings 18, a horizontal arc-shaped lower protrusion, and a horizontal arc-shaped upper protrusion 90 are provided.
spacers (not shown) are arranged side by side on the circumference. Furthermore, when joining two beams 6 to the column 1, two beam joining fittings 18 and 90° or 180°
spacers are arranged side by side on the circumference.

The column 1 on the first floor consists of an upper column 20 made of steel pipe and a lower column 22 made of steel pipe fixed to the lower end of the column by welding via a support member 21.
An anchor member 24 is fixed to a support plate 23 fixed to the lower end of the lower column 22.
The lower half of 2 and the anchor member 24 are embedded and fixed in the concrete foundation, and the upper joint metal fitting 5 is attached to the horizontal arc-shaped upper protrusion 8 of the beam joint metal fitting 18 fixed to each beam 6 on the top floor.
The horizontal annular groove 4 is fitted, and the plurality of PC steel bars 26 are
A nut 27, which is inserted through the through hole 12 of each of the lower joining metal fittings 3, the through hole 16 of each of the upper joining metal fittings 5, and the through hole of the support member 21, and screwed onto the end of the 20w4 rod 26, is tightened. The column-beam joints arranged in the vertical direction are fastened and connected by a PC steel rod 26 and a nut 27. Also, lower pillar 2
2 are provided with openings 29.30 in the upper and lower parts thereof for passing a spanner therethrough which engages the nut 27.28.

In the column and beam fitting structure of the first embodiment, the bending moment at the end of the beam is caused by the horizontal arc-shaped lower protrusion 7 and the horizontal arc-shaped upper part of the beam joint fitting 18 fixed to the beam 6. It is transmitted to the column 1 via the protrusion 8, the lower joining metal fitting 3 having the horizontal annular groove 2, and the upper joining metal fitting 5 having the horizontal annular groove 4. Furthermore, the prestressed PC steel rod 26 resists the pull-out stress of the column 1. No prestress is introduced into the lower column 22 in order to make the lower part of the first floor column a hinge type.

Furthermore, if no pull-out stress occurs in column 1, then P
The C steel rod 26 can also be omitted.

Figure 6 shows the collapse mechanism of the column-beam inset joint structure of the present invention, showing the lower part of the column on the first floor and the column 1.
The joint between the beam 6 and the beam 6 is the hinge 31, and the collapse type is beam collapse.

7 and 8 show a second embodiment of the present invention, in which the upper end of the column 1 has a wedge-shaped cross-section that expands upward and has an inner cylindrical surface and an outer truncated conical surface. A horizontal annular groove 2 is provided, and the inner cylindrical surface of the horizontal annular groove 2 projects upwardly than the outer frustoconical surface. A horizontal annular groove 4 having a wedge-shaped cross section that expands downward and has an inner cylindrical surface and an outer truncated conical surface is provided at the lower end of the column 1, and the inner cylindrical surface of the horizontal annular groove 4 has an outer truncated conical surface. It protrudes below the surface.

At the lower part of the beam joint fitting 18 fixed to the end of the beam 6 by welding, there is provided a horizontal arc-shaped lower protrusion 7 having an inner cylindrical surface and an outer truncated conical surface and a wedge-shaped cross section that decreases downward. A horizontal arc-shaped upper protrusion 8 having an upwardly contracting wedge-shaped cross section and having an inner cylindrical surface and an outer truncated conical surface is provided on the upper part of the beam joint fitting 18, and the horizontal annular groove at the upper end of the column 1 2, the horizontal arc-shaped lower protrusions 7 of the plurality of beams 6 are fitted, and the horizontal annular grooves 4 at the lower ends of the columns 1 are fitted into the horizontal arc-shaped upper protrusions 8 at the ends of each beam 6. There is. Further, the beam joint fitting 18 is arranged inside the extension surface of the tubular portion of the column 1.

In the case of the second embodiment, similarly to the case of the first embodiment, the PC
The column-beam joints arranged in the vertical direction may be fastened together using steel rods and nuts.

FIGS. 9 and 10 show a third embodiment of the present invention, in which at the upper end of a column l made of a steel pipe with a circular cross section,
An annular protrusion 9 provided at the lower part of the steel lower joint fitting 3 is fitted, the lower joining fitting 3 and the column l are fixed by welding, and the inner cylindrical surface and the outer side are attached around the upper part of the lower joining metal fitting 3. A horizontal annular groove 2 having a wedge-shaped cross section and having a truncated conical surface and expanding upward is provided, and the inner cylindrical surface of the horizontal annular groove 2 projects upwardly than the outer truncated conical surface.

An annular protrusion 13 provided on the upper part of the steel upper joint fitting 5 is fitted into the lower end of the column 1 made of a steel pipe with a circular cross section, and the upper joint fitting 5 and the column 1 are fixed by welding. A horizontal annular groove 4 with a wedge-shaped cross section that expands downward and has an inner cylindrical surface and an outer truncated conical surface is provided around the lower part of the joining fitting 5, and the inner cylindrical surface of the horizontal annular groove 4 has an outer truncated conical surface. It protrudes below the conical surface. Furthermore, the horizontal annular groove 2.4 has approximately the same diameter as the column 1 and is arranged concentrically therewith.

A horizontal arcuate lower protrusion 7 having an inner cylindrical surface and an outer truncated conical surface and having a wedge-shaped cross section that decreases downward is integrally connected to the lower part of the horizontal arcuate portion 17. A horizontal arcuate upper protrusion 8 having an inner cylindrical surface and an outer truncated conical surface and having a wedge-shaped cross section that decreases upward.
is provided to constitute a steel beam joint fitting 18, and a protrusion 19 provided on the outer surface of the beam joint fitting 18 is fitted into the end of the steel beam 6 having a rectangular cross section. 18 and the beam 6 are fixed by welding.

The horizontal arc-shaped lower protrusion 7 of the beam joint fitting 18 fixed to the ends of the plurality of beams 6 is fitted into the horizontal annular groove 2 of the lower joint fitting 3 fixed to the upper end of the pillar 1 on the lower floor,
The horizontal annular groove 4 in the upper joint fitting 5 fixed to the lower end of the column 1 on the upper floor is fitted into the horizontal arc-shaped upper protrusion 8 of each beam joint fitting 18.

A PC steel rod 26 is inserted through the through hole 12 provided in the center of the lower joining fitting 3 and the through hole 16 provided in the center of the upper joining fitting 5, as in the case of the first embodiment. The column-beam joints arranged in the vertical direction are tightened and connected by the PC steel rod 26 and the nut screwed thereon.

When implementing the first invention, the horizontal annular groove 2 and the horizontal annular groove 4 are not wedge-shaped in cross section, but are annular grooves of equal width having an inner cylindrical surface and an outer cylindrical surface, and the horizontal arcuate lower protrusion 7 and The horizontal arcuate upper protrusion 8 may not have a wedge-shaped cross section, but may be an arcuate protrusion of equal thickness having an inner cylindrical surface and an outer cylindrical surface.

When implementing this invention, the angles of adjacent beams 6 may be set to arbitrary angles. In addition, we use steel beams with an H-shaped cross section,
A beam joining fitting may be fixed to the end of the beam by welding.

In the case of the column and beam fitting joint structure of the present invention, the column 1 and the beam 6 can be assembled by insertion from above, so the column 1 and the beam 6 can be assembled easily and quickly by a robot. be able to.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

The horizontal arc-shaped lower protrusions 7 provided on the plurality of beams 6 are inserted from above into the horizontal annular groove 2 of the lower joint fitting 3 fixed to the upper end of the column 1, and the horizontal arc-shaped upper portions of the plurality of beams 6 are inserted. By performing a simple fitting operation of fitting the horizontal annular groove 4 of the upper joining metal fitting 5 fixed to the lower end of the column 1 into the protrusion 8 from above, the column 1 and the plurality of beams 6 are connected. It is possible to join easily and quickly and firmly.

[Brief explanation of drawings]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional front view showing a fitting structure of a column and a beam, and FIG. 2 is a partial longitudinal sectional front view thereof. , Fig. 3 is a sectional view taken along the line A-A in Fig. 1, Fig. 4 is a sectional view taken along the line 13-B in Fig. 1, and Fig. 5 shows the state in which the column-beam joints arranged in the vertical direction are tightened and connected. FIG. 2 is a partially cutaway vertical front view. FIG. 6 is a diagram showing the collapse mechanism of the column-beam fitting joint structure of the present invention. 7 and 8 show a second embodiment of the present invention, in which FIG. 7 is a partially vertical front view showing a fitting structure of a column and a beam, and FIG. It is a CC line enlarged sectional view. 9 and 10 show a third embodiment of the present invention, in which FIG. 9 is a partially longitudinal front view showing a fitting structure of a column and a beam, and FIG. DI-D
FIG. In the figure, 1 is a column, 2 is a horizontal annular groove, 3 is a lower joint metal fitting, 4 is a horizontal annular groove, 5 is an upper joint metal fitting, 6 is a beam, 7 is a horizontal arc-shaped lower protrusion, and 8 is a horizontal arc-shaped upper part. Projection, 10 is a horizontal plate, 12 is a through hole, 14 is a horizontal plate, 16 is a through hole,
17 is a horizontal arc-shaped portion, 18 is a beam joint, 20 is an upper column, 21 is a support member, 22 is a lower column, 25 is a concrete foundation, 26 is a PC steel bar, and 27 and 28 are nuts. "Nini" March 27, 1991

Claims (2)

[Claims] (1) A horizontal annular groove 2 is provided at the upper end of the column 1, a horizontal annular groove 4 is provided at the lower end of the column 1, and a horizontal arcuate lower protrusion 7 is provided at the lower end of the beam 6; A horizontal arc-shaped upper protrusion 8 is provided at the upper end of the beam 6, and a horizontal arc-shaped lower protrusion 7 at the end of the plurality of beams 6 is provided in the horizontal annular groove 2 at the upper end of the column 1. A column-beam fitting joint structure in which the horizontal annular groove 4 at the lower end of the column 1 is fitted into the horizontal arc-shaped upper protrusion 8 at the end of each beam 6. (2) A lower metal joining fitting 3 having a horizontal annular groove 2 with a wedge-shaped cross section that expands upward is fixed to the upper end of the column 1;
A metal upper joint fitting 5 having a horizontal annular groove 4 with a wedge-shaped cross section that expands downward is fixed to the lower end of the column 1, and a horizontal arcuate groove 4 with a wedge-shaped cross section that narrows downward to the lower end of the beam 6. A lower protrusion 7 is provided, and a horizontal arcuate upper protrusion 8 with an upwardly contracting wedge-shaped cross section is provided on the upper end of the beam 6, and a plurality of horizontal annular grooves 2 are provided in the horizontal annular groove 2 of the lower joint fitting 3. Beam 6
The horizontal arc-shaped lower protrusion 7 at the end of each beam 6 is fitted, and the horizontal annular groove 4 of the upper joining metal fitting 5 is fitted into the horizontal arc-shaped upper protrusion 8 at the end of each beam 6. Inset joint structure.