JPH0449340A - Column and beam inset joint structure - Google Patents

Abstract

PURPOSE:To quickly connect columns with beams by a simplified operation in which horizontal circular grooves formed on the upper and lower ends of a column are connected with horizontal circular arc-shaped projections provided to the joint metal of a beam. CONSTITUTION:Horizontal circular grooves 2 and 3 are formed on the upper and lower ends of a column 1, and horizontal circular arc-shaped projections 7 and 6 are formed on the downside and upside of the joint metal 5 of a beam 4. A wedge-insert groove 21 is also formed on the central part of both ends of the horizontal circular arc part 19. The horizontal circular arc-shaped lower projection 5 of the joint metal of beam is fitted into the groove 2 of the upper end of the column 1, the projection 7 of the joint metal 5 is fitted into the groove 3 of the lower end of the column 1, and a clamp wedge 8 is put between the adjacent joint metals 5 and fixed. The column 1 and the beam 4 can thus be quickly connected by the simplified operation.

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 and beam fitting joint structure of the present invention, a horizontal annular groove 2 is provided at the upper end of the column 1, and a horizontal annular groove 3 is provided at the lower end of the column 1. is,
A horizontal arc-shaped lower protrusion 6 is provided at the lower part of the beam joint fitting 5 at the end of the beam 4, and a horizontal arc-shaped upper protrusion 7 is provided at the upper part of the beam joint fitting 5. The horizontal arc-shaped lower protrusions 6 of the plurality of beam joint fittings 5 are fitted into the horizontal annular grooves 2 of the beam joint fittings 5, and the horizontal annular grooves of the lower ends of the pillars 1 are fitted into the horizontal arc-shaped upper protrusions 7 of the beam joint fittings 5. The grooves 3 are fitted, and a tightening wedge 8 is driven between the adjacent beam joining metal fittings 5.

Further, a metal lower joint fitting 9 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 joining fitting 10 having a horizontal annular groove 3 with a wedge-shaped cross section that expands downward is fixed to the lower end of the column 1, and is fixed to the lower part of the beam joining fitting 5 at the end of the beam 4, which contracts downward. A horizontal arc-shaped lower protrusion 6 with a wedge-shaped cross section is provided, and a horizontal arc-shaped upper protrusion 7 with a wedge-shaped cross section that decreases upward is provided on the upper part of the beam joining metal fitting 5. The horizontal arc-shaped lower protrusions 6 of the plurality of beam joint fittings 5 are fitted into the grooves 2, and the horizontal arc-shaped upper protrusions 7 of each beam joint fitting 5 are fitted into the grooves 2.
The horizontal annular groove 3 of the upper joint fitting 1o is fitted into the upper joining metal fitting 1o,
The above object can also be achieved by driving the tightening wedge 8 between the adjacent beam joining fittings 5.

〔Example〕

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

1 to 6 show a first embodiment of the present invention, in which an annular protrusion is provided at the upper end of a column 1 made of a steel pipe with a circular cross section at the bottom of a lower steel joint X9. 11 is inserted, the lower joining fitting 9 and the column 1 are fixed by welding, and a horizontal annular groove 2 with a wedge-shaped cross section (inverted trapezoidal cross section) that expands upward is provided around the upper part of the lower joining fitting 9. Furthermore, a cross-shaped reinforcing rib 13 is provided on the horizontal plate 12 of the lower joining metal fitting 9, and a plurality of (four in the illustrated case) through holes 14 are provided.

An annular protrusion 15 provided at the upper part of the steel upper joint fitting 1o is fitted into the lower end of the pillar 1, and the upper joint fitting 1o
0 and column l are fixed by welding, and the upper joint metal fitting 1
A horizontal annular groove 3 with a wedge-shaped cross section (trapezoidal cross section) that expands downward is provided around the lower part of 0, and a cross-shaped reinforcing rib 17 is provided on the horizontal plate body 16 of the upper joint fitting 10.
, and a plurality (four in the illustrated case) of through holes 18 are provided, and the horizontal annular grooves 2 and 3 have approximately the same diameter as the pillar 1 and are arranged concentrically with the pillar 1. has been done.

A horizontal arcuate lower protrusion 6 having a wedge-shaped cross section (inverted trapezoidal cross section) that reduces downwardly is integrally connected to the lower part of the horizontal arcuate portion 19, and a wedge-shaped cross section that reduces upwardly to the upper part of the horizontal arcuate portion 19. Horizontal arc-shaped upper protrusions 7 (with trapezoidal cross section) are integrally connected to form a steel beam joint 5, and the quadrangular protrusions 20 provided on the outer surface of the beam joint 5 are It is fitted into the end of the cross-sectional steel beam 4, and the beam joining fitting 5 and the beam 4 are fixed by welding.

The horizontal arc-shaped lower protrusion 6 of the beam joint fitting 5 fixed to the ends of the plurality of beams 4 is fitted into the horizontal annular groove 2 of the lower joint fitting 9 fixed to the upper end of the pillar 1 on the lower floor. ,
and an upper joint fitting 10 fixed to the lower end of the column 1 on the upper floor
The horizontal annular groove 3 is fitted into the horizontal arc-shaped partial protrusion 7 of each beam joining fitting 5.

A wedge insertion groove 21 with a U-shaped cross section is provided at the center of both side edges of the horizontal arcuate portion 19 in each beam joining fitting 5, and extends across the wedge insertion grooves 21 of the horizontally adjacent horizontal arcuate portions 19. , a tightening wedge 8 having a rectangular cross section is inserted, and by driving the tightening wedge 8, the beam joining metal fittings 5 arranged in a circular manner are tightened and connected.

The first floor column 1 consists of a steel pipe upper column 22 and a steel pipe lower column 24 fixed to its lower end via a support member 23 by welding.
An anchor bolt 26 is fixed by a nut 27 to a support plate 25 fixed to the lower end of the lower column 24, and the lower half of the lower column 24 and the anchor bolt 26 are embedded and fixed in a concrete foundation 28. has been done.

The horizontal annular groove 3 of the upper joint fitting 10 is fitted into the horizontal arc-shaped upper protrusion 7 of the beam joint fitting 5 fixed to each beam 4 on the top floor, and the plurality of PC steel bars 29 are connected to each lower beam. The PC steel rod 2 is inserted through the through hole 14 of the joining metal fitting 9, the through hole 18 of each upper joining metal fitting 10, and the through hole of the supporting member 23.
The nut 30 screwed onto the end of 9 is tightened, and the PC
Column-beam joints aligned in the vertical direction are fastened together by steel rods 29 and nuts 30. Also provided in the upper and lower portions of the lower post 24 are openings 31.32 for the insertion of spanners that engage the nuts 30.27.

In the column-to-beam fit-in joint structure of the first embodiment, the bending moment at the end of the beam is applied to the beam joint fitting 5 fixed to the beam 4.
It is transmitted to the column 1 via the horizontal arc-shaped lower protrusion 6 and the horizontal arc-shaped upper protrusion 7, the lower stage joint fitting 9 having the horizontal annular groove 2, and the upper stage joining metal fitting 10 having the horizontal annular groove 3. Ru. Further, the shear force at one beam end is transmitted to the other beam end via the clamping wedge 8. Furthermore, the prestressed PC steel rod 29 resists the stress of the pillar 1.

In addition, if no pull-out stress is generated in column 1, PC steel bar 29
can also be omitted.

Figure 7 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 l.
The joint between the beam 4 and the beam 4 is Hinmi 33, and the collapse type is beam collapse.

FIG. 8 shows a second embodiment of the present invention, in which wedge insertion grooves 21 with a U-shaped cross section are provided on both upper and lower sides of both side edges of the horizontal arc-shaped portion 19 of each beam joint fitting. Upper and lower wedge insertion grooves 2 of horizontally adjacent horizontal arcuate portions 19
A tightening wedge 8 having a rectangular cross section is driven across the entire length of the first embodiment, but the other structure is the same as that of the first embodiment.

FIG. 9 shows a third embodiment of the present invention, in which wedge insertion grooves 21 with a semicircular cross section are provided on both upper and lower sides of both edges of the horizontal arc-shaped portion 19 of each beam joint fitting. The upper and lower wedge insertion grooves 2 of the horizontal arcuate portions 19 adjacent to each other in the direction
A tightening wedge 8 having a circular cross section is driven across the first embodiment, but the other structure is the same as that of the first embodiment.

10 and 11 show a fourth embodiment of the present invention, in which an annular protrusion is provided at the upper end of a column 1 made of a steel pipe with a circular cross section at the lower part of a lower steel joint fitting 9. 11
is inserted, the lower joint fitting 9 and the column 1 are fixed by welding, and around the upper part of the lower joint fitting 9 there is a wedge-shaped cross section that has an inner cylindrical surface and an outer truncated conical surface and expands upward. A horizontal annular groove 2 is provided, and the horizontal annular groove 2
The inner cylindrical surface projects upwardly than the outer frustoconical surface.

An annular protrusion 15 provided at the top of the upper steel joint fitting lO is fitted into the lower end of the column l made of a steel pipe with a circular cross section,
The upper joint fitting 10 and the column 1 are fixed by welding,
In addition, a horizontal annular groove 3 having a wedge-shaped cross section that includes an inner cylindrical surface and an outer truncated conical surface and expands downward is provided around the lower part of the upper joint fitting 10, and the inner cylindrical surface of the horizontal annular groove 3 protrudes below the outer truncated conical surface.

Furthermore, the horizontal annular groove 2.3 has approximately the same diameter as the column 1 and is arranged concentrically therewith.

A horizontal arcuate lower protrusion 6 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 19. A horizontal arcuate upper protrusion 7 having a wedge-shaped cross section that reduces upward and has an inner cylindrical surface and an outer truncated conical surface.
is provided to constitute a steel beam joint fitting 5, and the protrusion 20 provided on the outer surface of the beam joint fitting 5 is fitted into the end of the steel beam 4 having a rectangular cross section. 5 and the beam 4 are fixed by welding.

The horizontal arc-shaped lower protrusion 6 of the beam joint fitting 5 fixed to the ends of the plurality of beams 4 is fitted into the horizontal annular groove 2 of the lower joint fitting 9 fixed to the upper end of the pillar 1 on the lower floor. ,
and an upper joint fitting 10 fixed to the lower end of the column 1 on the upper floor
The horizontal annular groove 3 in is fitted into the horizontal arcuate upper protrusion 7 of each beam joining fitting 5.

A PC steel rod 29 is inserted through the through hole 14 provided at the center of the lower joining fitting 9 and the through hole 18 provided at the center of the upper joining fitting 10, 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 29 and the nut screwed thereon.

A wedge insertion groove 21 with a U-shaped cross section is provided at the center of both side edges of the horizontal arcuate portion 19 in each beam joint 5, and spans the wedge insertion groove 21 of the horizontally adjacent horizontal arcuate portions 19. , a tightening wedge 8 with a square cross section is driven.

12 to 16 show examples of the tightening wedge 8 that can be used when carrying out the present invention, in which the case of FIG. 12 has a flat slope 34, and the case of FIG. 13 has a flat slope 34. It has a serrated slope 35, and in the case of FIG. 14 it is a round bar shape with a taper, and in the case of FIGS. 15 and 16,
It is in the shape of a tapered round bar with a large number of annular tooth shapes 36.

When implementing the first invention, the horizontal annular groove 2 and the horizontal annular groove 3 do not have a wedge-shaped 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 6 and the horizontal arcuate upper protrusion 7 may not have a wedge-shaped cross section, but may have an equal thickness arcuate protrusion having an inner cylindrical surface and an outer cylindrical surface.

When implementing this invention, the angles of adjacent beams 4 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 4 can be assembled by insertion from above, so the column 1 and the beam 4 can be assembled easily and quickly by a robot. be able to.

〔Effect of the invention〕

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

The horizontal arc-shaped lower protrusion 6 provided on the plurality of beams 4 is inserted from above into the horizontal annular groove 2 of the lower joint fitting 9 fixed to the upper end of the column 1, and the horizontal arc-shaped groove of the plurality of beams 4 is inserted. An upper joint fitting 1o fixed to the upper protrusion 7 and the lower end of the column 1
By performing a simple fitting operation of fitting the horizontal annular groove 3 from above, the column 1 and the plurality of beams 4 can be easily and quickly joined. Since a tightening wedge 8 is driven between the beams 5 and 5, the beam joints 5 arranged on the circumference are integrated, and the bending moment of one beam end is reliably transmitted to the other beam end. Therefore, the column 1 and the beam 4 can be firmly fitted and connected.

[Brief explanation of drawings]

1 to 6 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 B-B in FIG. 1,
FIG. 5 is a sectional view taken along the line CC in FIG. 1, and section 6 is a partially cutaway longitudinal sectional view showing a state in which the column-beam joints arranged in the vertical direction are tightened and connected. FIG. 7 is a diagram showing the collapse mechanism of the column-beam fitting joint structure of the present invention. FIG. 8 is a partially vertical front view showing a fitting joint structure between a column and a beam according to a second embodiment of the present invention, and FIG. 9 is a front view showing a third embodiment of the present invention.
FIGS. 10 and 11, which are partially vertical front views showing a fitting joint structure of a column and a beam according to an embodiment, show a fourth embodiment of the present invention, and FIG. A partially vertical front view showing the fit-in joint structure, FIG. 11 is taken from D-D in FIG. 10.
FIG. 12 to 14 are perspective views showing an example of the tightening wedge, FIG. 15 is a side view showing another example of the tightening wedge, and FIG. 16 is a front view of the tightening wedge. In the figure, 1 is a column, 2 and 3 are horizontal annular grooves, 4 is a beam, 5 is a beam joint fitting, 6 is a horizontal arc-shaped lower protrusion, 7 is a horizontal arc-shaped upper protrusion, 8 is a tightening wedge, 9 is the lower joint metal fitting, 1
0 is the upper joint metal fitting, 19 is the horizontal arc-shaped part, 21 is the wedge insertion groove, 28 is the concrete foundation, 29 is the PC steel bar, 3
o stands for Natsu, 112. Figure 12 Figure 13

Claims (2)

[Claims] (1) A horizontal annular groove 2 is provided at the upper end of the column 1, and the column 1
A horizontal annular groove 3 is provided at the lower end of the beam 4, and a horizontal arcuate lower protrusion 6 is provided at the lower part of the beam joint fitting 5 at the end of the beam 4.
A horizontal arc-shaped upper protrusion 7 is provided on the upper part of the beam joint fitting 5, and horizontal arc-shaped lower protrusions 6 of a plurality of beam joint fittings 5 are fitted into the horizontal annular groove 2 at the upper end of the column 1. Then, the horizontal annular groove 3 at the lower end of the column 1 is fitted into the horizontal arc-shaped upper protrusion 7 of each beam joint fitting 5, and a tightening wedge 8 is driven between the adjacent beam joint fittings 5. Column and beam inset joint structure. (2) A metal lower joint fitting 9 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 10 having a horizontal annular groove 3 is fixed,
At the bottom of the beam joint fitting 5 at the end of the beam 4, a horizontal arcuate lower protrusion 6 with a downwardly contracting wedge-shaped cross section is provided. An arcuate upper protrusion 7 is provided, and horizontal arcuate lower protrusions 6 of a plurality of beam joint fittings 5 are fitted into the horizontal annular groove 2 of the lower joint fitting 9, and the horizontal arcuate upper part of each beam joint fitting 5 is fitted. A column-to-beam fitting joint structure in which the horizontal annular groove 3 of the upper joint metal fitting 10 is fitted into the protrusion 7, and a tightening wedge 8 is driven between adjacent beam joint metal fittings 5.