JPH0814141B2 - Column-beam joint structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a joining metal object such as a split T metal object to be joined to an end of a steel beam, and a rectangular steel pipe column using a long bolt that is proudly provided therebetween. The present invention relates to a pillar / beam joint structure for joining a steel beam.

[Problems to be Solved by Prior Art and Invention]

The joint between the rectangular steel pipe column and the steel beam is configured by using a split T metal object such as a split T metal object or an end plate to be joined to the end portion of the steel beam and a long bolt inserted between the opposing metal objects. The structure has the advantages that by filling the inside of the steel pipe with concrete, high rigidity and yield strength can be secured for the column, and at the same time, the effect of transmitting bolt axial force to the column can be expected.

However, in this joint structure, since the long bolts are orthogonal to each other inside the pillar, the long bolts are arranged in different steps, and with this, there is a level difference at the top end of the beam in the orthogonal direction, and it is difficult to fit the deck slab and the like. May be.

In addition, the side surface (flange) of the steel pipe is poor in out-of-plane rigidity and may deform due to the introduction of axial force to the bolt. Therefore, the bolt main tightening work bears the reaction force to the inside of the concrete steel pipe. Since it will be done after the filling is completed, there is a problem that it takes time to tighten the bolt.

This invention has been made in view of this background,
It is intended to newly propose a joint structure that solves the above problems.

[Means for solving the problem]

In the present invention, a main body portion having an opening through which the other long bolt penetrates is formed in one intermediate portion of the long bolts orthogonal to each other inside the pillar, and the long bolt in the orthogonal direction is inserted into the opening of this main body portion. Thus, the level of the shaft of the long bolt in both directions is made to be the same, and the problem of the step difference of the beam due to the stepped arrangement is solved.

Also, of the special long bolt and long bolt that the main body is formed,
A non-circular deformed nut is screwed into a position on the side of the pillar where the threaded shaft is inscribed. This special shaped nut is engaged with the pillar, and the compressive force between the opposite side faces is applied when the special long bolt and the tensile force is introduced to the long bolt, and when the long bolt is exaggerated, that is, the construction of the steel frame. Sometimes it is possible to perform the final tightening of the nut without deforming the square steel pipe.

The special long bolt and the long bolt are both joined to the end face of the steel frame beam and are exaggerated between the facing metal fittings, and the long bolt is arranged so as to penetrate the main body of the special long bolt.

〔Example〕

Hereinafter, the present invention will be described with reference to the drawings showing one embodiment.

As shown in FIG. 1, the present invention is provided with a column 1 of a rectangular steel pipe and a steel frame beam 2 and is installed between joining metal parts 3, 3 such as a split T metal part joined to the end of the steel beam 2, The special long bolt 4 and the normal long bolt 5 are joined together, and the long bolt 5 is passed through the special long bolt 4 as shown in FIGS. Are arranged on the same level.

As shown in FIG. 3, the special length bolt 4 has a main body portion 4a having an opening 4b through which a long bolt 5 in a direction orthogonal to the middle portion is formed, and a male screw is formed at both ends of the main body portion 4a. The cut shaft portions 4c, 4c are continuous and have a turnbuckle shape as a whole. The opening 4b is opened, for example, in the shape of a long hole so that a plurality of long bolts 5 can be inserted therethrough.

FIG. 4-I, II, and III are the x-x line, y-y line, and z- of FIG.
The cross section of the z-line is shown, but as shown here, the cross-sectional shape of the main body portion 4a of the special length bolt 4 has one end face penetrating the side surface of the column 1 as shown in FIG. It has a non-circular shape, for example, a rectangular shape, so that it can be inscribed without doing this. This shape is not limited to a rectangle.

The main body portion 4a becomes a backup material that bears the reaction force of the tension of the special length bolt 4 when the nut 6 is tightened by inscribed at one end to the side surface of the pillar 1, and maintains the lateral distance between the pillar 1 together with the deformed nut 7 described later. And serves to prevent dents on the sides.

As shown in FIG. 5, the long bolt 5 arranged in the direction orthogonal to the special long bolt 4 is formed by forming male screw shafts 5a, 5a on both ends of a steel rod having the same cross section over the entire length. The opening 4b of the main body 4a of the long bolt 4 has a height such that the long bolt 5 can be inserted therethrough.

FIG. 2I shows the axial cross section of the long bolt 5 at the joint. As shown here, the special long bolt 4
Is on the shaft portion 4c of the body portion 4a on the side opposite to the side inscribed in the pillar 1,
As shown in FIG. 6, a deformed nut 7 having the same cross-sectional shape as the main body 4a is screwed and inserted between the opposed joint metal parts 3,3.

As described above, the deformed nut 7 serves as a backup material that engages with the inner peripheral surface of the pillar 1 when the nut 6 is tightened, and prevents the side surface from being deformed, like the end surface of the main body portion 4a inscribed in the pillar 1.

As shown in FIG. 7-I, the insertion hole 1a on the side of the pillar 1 where the special length bolt 4 is inserted in the direction in which the special length bolt 4 is inserted has the cross-sectional shape of the main body portion 4a and the deformed nut 7. Correspondingly, it is opened in a rectangular shape, and the insertion hole 1b on the opposite side is II.
As shown in FIG. 3, only the shaft portion 4c is opened so that it can be inserted.

Deformed nuts 7 and 7 inscribed in the pillar 1 are screwed onto both ends of the long bolt 5 orthogonal to the special long bolt 4 as shown in FIG. 2-II showing the axial cross section of the special long bolt 4, Correspondingly, also in the insertion direction of the long bolt 5, similarly to FIG.
The insertion holes 1a and 1b as shown by I and II are opened.

Both the special long bolt 4 and the long bolt 5 are inserted through the rectangular insertion hole 1a, and the main body portion 4a or one of the deformed nuts 7 is inserted.
When the end face of the column abuts the inner circumference of the column 1, it is rotated by 90 °, for example, as shown in FIG.

In the embodiment, the length of the main body portion 4a of the special length bolt 4 is made smaller than the distance between the inner peripheral surfaces of the columns 1 facing each other, the center of the main body portion 4a is formed closer to the one shaft portion 4c side, and the deformed nut 7 is formed. By making the screwing position of the column adjustable, it is possible to cope with the change in the dimension of the column 1. Similarly for long bolt 5, deformed nut 7
Since the position of is variable, it can be applied to columns 1 having different sizes.

If it is difficult to form the rectangular insertion hole 1a, it may be drilled several times continuously as shown in Fig. 7-III. In that case, the main body 4a of the special long bolt 4 is formed. It is necessary to match the cross-sectional shape of the deformed nut 7 with that.

After inserting the special long bolts 4 and the long bolts 5, the nuts 6 are finally tightened, and then when the pillar 1 is made of steel pipe concrete, concrete 8 is placed inside the pillar 1.
And the joint is completed.

The structure of the joint portion is the same even in the case of a pure steel structure in which the column 1 is not filled with concrete 8.

If the side surface of the pillar 1 has a high out-of-plane rigidity and is unlikely to be deformed, it is not always necessary to insert the deformed nut 7.

〔The invention's effect〕

The present invention is as described above, and one of the long bolts orthogonal to each other in the pillar is formed in a special shape having an opening, and the other long bolt is arranged so as to penetrate through the special long bolt. Can be located at the same level, and the levels of the top ends of the orthogonal steel beam can be made the same, and the problem of the accommodation can be solved.

In addition, the main body of the special length bolt and the deformed nut serve as a backup material when tightening the nut, and since these bear the reaction force of the bolt tension, the main side of the pillar can be fully tightened at the same time without deforming the side of the pillar. Is possible,
The construction will be rationalized.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIGS.
Are cross-sectional views taken along line XX and YY of FIG. 1, FIG. 3 is a front view showing a special bolt, and FIGS.
Each xx line, yy line, z-z line sectional view of the figure, FIG. 5 is a front view showing a long bolt, FIGS. 6-I, II are front views showing deformed nuts, respectively. A side view, FIGS. 7-I and II are front views showing rectangular and circular insertion holes, respectively, and III is a front view showing another example of forming a non-circular insertion hole. 1 ... Pillar, 1a, 1b ... Insertion hole, 2 ... Steel beam, 3 ... Joining metal, 4 ... Special length bolt, 4a ... Main body, 4b ... Opening, 4c ... Shaft, 5 …… Long bolt, 5a …… Shaft, 6 ……
Nuts, 7 ... Deformed nuts, 8 ... Concrete.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Tomita 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Inside Kashima Construction Co., Ltd. (72) Inventor Kansuke Honma 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 Kashima Construction Co., Ltd.

Claims (2)

[Claims] 1. A joint in which a column of a rectangular steel tube and a steel beam are joined to one end of the steel beam by a special long bolt that is proudly provided between opposing side faces of the column and a long bolt in a direction orthogonal to the special long bolt. It is a joint structure that is fastened to a metal object, and a main body with a height larger than the diameter of the shaft of the long bolt is formed in the middle of the special long bolt with an opening through which the long bolt is inserted. A column-beam joint structure characterized in that the bolt is pierced between the joint metal parts facing each other through the opening of the body of this special length bolt. 2. A non-circular deformed nut is screwed into the shaft portion at one end of the special long bolt and the shaft portions at both ends of the long bolt so as to be inscribed in the column, and the special long bolt has one end of the main body portion. 2. The column-beam joint structure according to claim 1, wherein the long bolt is engaged with the column at the time of tightening the nut from the joint metal in the variant nuts at both ends.