JPH03260236A - Joint of steel pipe column with beam and joint metal fixture - Google Patents

Abstract

PURPOSE:To omit welding works and increase assemblying efficiency in the field, by welding end plates in advance on the end of steel pipe columns and connecting them to jointing metal fixtures with high strength bolts. CONSTITUTION:Upper and lower steel pipe columns 1 are constituted of beams 2 by using of jointing metal fixtures 3 and bolts. The jointing metal fixtures 3 are formed by welding a steel ring plate 5 at the top and bottom of a cross metal 4 having a horizontal cross section and pierced bolt holes 6, 7 are provided. End plates 9 are welded in advance at the end of the steel pipe columns 1 and connected at the inside of the steel ring plates 5 of the upper and lower ends of the jointing metal fixture 3 in the joint. After the beams 2 are inserted into the steel ring plates 5, the beam web 2a is connected via a splice plate 10 at the cross metal 4 and the beam web 2b is connected to the outside of the steel ring plates 5 by high strength bolts 7a, 8a respectively. In this way, welding works in field can be omitted and workability can be remarkably increased.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention mainly relates to square steel pipe columns or circular steel pipe columns and H
The present invention relates to the structure of a column-beam joint used for joining shaped steel beams, etc., and a joining hardware suitable for the joint.

[Conventional technology]

When a circular or square steel pipe is used as a pillar material and an H-beam beam is attached to it, the structure of the joint is as follows.

(1) Stiffener ring type Conventionally, stiffener rings are often used for the joint between steel pipe columns and H-beam beams, and when installing the beam flange at the joint, a stiffener ring is placed on the outside of the steel pipe column at the location. This stiffener ring is welded, and an H-shaped steel beam is connected to this stiffener ring by welding or the like.

(2) Joint ring type Figure 8 shows a joint ring type, in which a ring-shaped joint metal fitting 21 whose cross section in the circumferential direction forms a T-shaped cross section is used, and is welded to the upper and lower steel pipe columns 1. Weld the protruding part to the flange of beam 2.

(3) Long tightening high-strength bolt tensile joint type As an example of high-strength bolt joining, as shown in Fig. 9, a long bolt is connected to a concrete-filled steel pipe column 1 through an end plate 22 at the end of the beam. There is one in which the beam 2 is tension-bonded with a tightening high-strength bolt 23 (Matsui, Tsuda, et al.; Experimental research on steel pipe concrete IJ-to-column joints using long tightening high-strength bolt tension bonding, Architectural Institute of Japan conference academic lecture abstract) , October 1989).

(4) Inserted diaphragm type Figure 10 is also an example of high-strength bolt connection, in which the column 1 and beam 2 are connected with high-strength bolts 25 via the end plate 22 and cast iron insert diaphragm 24. It is (
JP-A-63-251540 and Aomai, Tagawa et al.;
Experimental research on beam-column joints using interpolated diaphragms (Part 2), Abstracts of Academic Lectures at the Architectural Institute of Japan Conference, 19
(See October 1989).

[Problem to be solved by the invention]

However, the above-mentioned conventional technology has the following problems.

In the case of the welded joints described in (1) and (2) above, the number of processing steps is extremely large in the assembly stage, which increases cost, and cutting and welding the pillars is not preferable in terms of the accuracy of the bridge. In addition, it has been pointed out that in (1) stiffener ring type column and beam joint structure, the scallops provided during welding are a fatal structural defect (Yoka, Tabuchi et al.; Influence of details of joints on mechanical properties of joints - Part 4 Influence of secondary bending stress on beam flange - 1 Architectural Institute of Japan Conference Academic Lecture Abstracts, October 1989)
.

In addition, (3) long tightening high-strength bolt tension connection method requires concrete filling according to the panel zone supplementary regulations, which may cause construction problems, cost problems, and seismic resistance problems due to the increased weight of the building. There is.

Although the interpolated diaphragm type (4) saves time in the assembly step, the joint portion has a closed cross section, resulting in a complicated structure, which may pose problems in terms of cost.

The present invention aims to solve the above-mentioned problems in the prior art.

[Means to solve the problem]

The steel pipe column beam joint of the present invention has open cross-section metal fittings formed by integrating ring-shaped metal fittings at the upper and lower ends of cross-shaped metal fittings having a cross-shaped horizontal cross-sectional shape, interposed between the upper and lower steel pipe columns, A ring-shaped metal fitting is bolted to an end plate provided at the end of a steel pipe column, and a cross-shaped metal fitting is bolted to a beam.

The steel pipe column beam joint hardware of the present invention is one in which ring-shaped hardware is integrated at the upper and lower ends of the cross-shaped hardware having a cross-shaped horizontal cross-sectional shape.
The ring-shaped hardware is provided with a through-hole for bolting to the end plate provided at the end of the steel pipe column, and the cross-shaped hardware is provided with a through-hole for bolting to the web of the beam via the splice plate.

In addition, if there is an end plate at the end of the beam, instead of using splice plates, provide plates at right angles to the four ends of the cross-shaped hardware, and bolt these plates to the end plates at the end of the beam. It is possible to use steel pipe column beam joint hardware provided with through holes for this purpose. In this case, since the bending rigidity is increased by the end plates, the plate thickness of the cross-shaped hardware can be made thinner within a range where the axial force can be maintained.

In addition, if the ring-shaped hardware is extended to the outer periphery of the end plate provided at the end of the steel pipe column, and a through hole is provided on the outer periphery of the ring-shaped hardware for bolt connection to the flange of the beam, the connection to the beam can be easily made. It can be made even more reliable.

Note that the joining hardware may be a cross-shaped hardware and a ring-shaped hardware that are manufactured separately and joined together by welding or the like, or they may be integrally molded from cast iron.

In addition, in the present invention, a cross-shaped metal fitting is used as a part of the joining metal fitting, but depending on the direction in which the beam is attached, a T-shaped metal fitting having a Y-shaped horizontal cross section may be used instead of the cross-shaped metal fitting. It is also possible to use a T-shaped hardware having a T-shaped horizontal cross-sectional shape.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of a steel pipe column beam joint according to the present invention, in which an upper and lower steel pipe column 1 and a beam 2 are joined by bolts using a joining metal 3.

An end plate 9 is welded in advance to the steel pipe end of the steel pipe column I, and a ring-shaped metal fitting 5 at the upper and lower ends of the joint fitting 3 at the joint part is welded in advance.
It is joined to the inside of the high-capacity 6a. After the beam 2 is inserted between the ring-shaped metal fittings 5, the beam web 2a is connected to the cross-shaped metal fitting 4 via the splice plate 10, and the beam flange 2b is connected to the high-strength bolt 7a on the outside of the ring-shaped metal fitting 5.
, 8a.

FIGS. 2 and 3 show an example of the steel pipe column beam joint fitting 3 of the present invention used in the above-mentioned embodiment. It is constructed by welding and joining metal parts 5. This joining hardware 3 has a through hole 6 on the inner circumference of the ring-shaped hardware for bolting to the end plate 9 of the steel pipe column 1.
However, splice plates 10 are attached to the four ends of the cruciform hardware.
A through hole 7 is provided on the outer periphery of the ring-shaped hardware for bolt connection to the flange 2b of the beam 2. It can be joined using only force bolts.

The joint hardware 3 in FIGS. 2 and 3 is for the case where the steel pipe column 1 is square, whereas the embodiment in FIG. 4 is for the case where the steel pipe column 1 is circular, and the shape of the joint hardware 3 is also It looks almost circular.

FIG. 5 shows another embodiment of the steel pipe column beam joint. In this case as well, an end plate 9 is welded to the end of the steel pipe column 1, and a ring-like shape at the upper and lower ends of the joint metal fittings 3 is shown. It is joined by the metal fitting 5 and the high-end metal fitting 6a. An end plate 13 is welded to the end of the beam 2 in advance, and the beam is attached to a beam joining plate 11 provided perpendicularly to the tip of the cross-shaped metal fitting 4.
2a.

6 and 7 show an example of the joining hardware 3 used in the embodiment shown in FIG.
The difference from the joining hardware shown in the figure is that plates 11 are formed at the four ends of the cross-shaped hardware 4 in a direction perpendicular thereto, and through-holes 1
By providing 2, the end plate 1 of the beam 2 ends is
3 and the outside diameter of the ring-shaped hardware 5 is larger than the outside diameter of the steel pipe column in the joint hardware shown in FIGS. The point is that it is equivalent to the outer diameter.

As mentioned above, in both cases of FIG. 1 and FIG. 5, since the joining hardware 3 is configured to form an open cross section, the operator can insert his/her hand into the back side of the member when bolting. Can be easily bolted together.

〔Effect of the invention〕

In the steel pipe column beam joint of the present invention, the steel pipe column and the beam can be joined only with bolts, eliminating the need for on-site welding work and significantly improving work efficiency. That is, since the steel pipe column beam joint hardware of the present invention is formed as an open cross-section member by the cross-shaped hardware and the ring-shaped hardware, high-strength bolt joining is easy and on-site welding work can be omitted.

In addition, factory processing, including joining hardware, is easy, simple,
It becomes possible to construct a steel frame quickly and at low cost.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing one embodiment of the steel pipe column beam joint of the present invention, and Fig. 2 is a plan view showing the joining hardware used for the square steel pipe column in the embodiment of Fig. 1 (the left half is a cross section). figure),
Figure 3 is the front view (the left half is a cross-sectional view), Figure 4 is the first
FIG. 5 is a plan view (the left half is a cross-sectional view) showing the joining hardware used for the circular steel pipe column in the embodiment shown in the figure, FIG. 5 is a vertical cross-sectional view showing another embodiment of the steel pipe column beam joint of the present invention, and FIG. The figure is a plan view (the left half is a sectional view) showing the joining hardware used for the square steel pipe column in the embodiment shown in Figure 5, and Figure 7 is a front view (
(The left half is a cross-sectional view), Figure 8 is a vertical cross-sectional view showing a conventional joint ring type, Figure 9 is a perspective view showing a conventional long tightening high-strength bolt tension joint type, and Figure 10 is a conventional FIG. 2 is a perspective view of an example interpolating diaphragm format. 1... Steel pipe column, 2... Beam, 3... Joining hardware, 4
...Cross-shaped hardware, 5...Ring-shaped hardware, 6. 7.
8. 12...Through hole, 6a, 7a, 8a, 12a
... Bolt, 9.13 ... End plate, 10.
... Splice plate, 11... Beam joining plate No. 9 2 0 Fig. Fig.

Claims (4)

[Claims] (1) A joint metal fitting formed by integrating a ring-shaped metal fitting at the upper and lower ends of a cross-shaped metal fitting having a cross-shaped horizontal cross-sectional shape is interposed between the upper and lower steel pipe columns, and the ring-shaped metal fitting is attached to the end of the steel pipe column. A steel pipe column beam joint, characterized in that it is bolted to an end plate provided on the steel pipe column, and the cross-shaped hardware is bolted to the beam. (2) A joining metal fitting formed by integrating a ring-shaped metal fitting into the upper and lower ends of a cross-shaped metal fitting having a cross-shaped horizontal cross-sectional shape,
The ring-shaped hardware is provided with a through hole for bolting to an end plate provided at the end of the steel pipe column, and the cross-shaped hardware is provided with a through hole for bolting to the web of the beam via the splice plate. A steel pipe column beam joint hardware characterized by the following: (3) The ring-shaped hardware extends to the outer periphery of an end plate provided at the end of the steel pipe column, and has a through hole provided in the outer periphery of the ring-shaped hardware for bolt connection to the flange of the beam. The steel pipe column beam joint hardware according to claim 2. (4) A joining metal fitting formed by integrating a ring-shaped metal fitting into the upper and lower ends of a cross-shaped metal fitting having a cross-shaped horizontal cross-sectional shape,
The ring-shaped metal fittings are provided with through holes for bolting to the end plates provided at the ends of the steel pipe columns, and plates are provided at right angles to the four ends of the cross-shaped metal fittings. A steel pipe column beam joining hardware characterized by having a through hole for bolt joining with an end plate provided at the end of the steel pipe column.