JP2972043B2 - Method of joining different kinds of structural members and column / beam joining structural members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining different types of structural members for joining a joint between a column structure made of reinforced concrete and a beam structure made of steel, and a column / beam used in a joint between a column structure and a beam structure. The present invention relates to a joining structural member.

[0002]

2. Description of the Related Art In a building having a reinforced concrete column structure and a steel frame beam structure, there is no generalized method for joining the column structure and the beam structure. Therefore, at present, it is in a state of being carried out by a method according to the conventional joining method in a column / beam steel frame concrete structure. For example, when using steel H (I-shape steel) as a beam structural member, when there is pillar portions beams perpendicular, the steel H in the orthogonal state, leaving the upper and lower flanges and c _d blanking the steel H Since joining and welding are performed, H steel as a beam structure penetrates the column structure. When arranging the column reinforcing bars in this state, the column main reinforcing bars are brought to the four corners of the column cross section so as not to hit the flange of the H steel while maintaining a predetermined interval. Further, the shear reinforcement at the junction of pillars and beams, either through a hole in Ryou _et blanking, or are Haisuji by a method of directly fixed by welding to Ryou _et blanking.

[0003] Also, there has been proposed a construction method in which a joint between a reinforced concrete column structure and a steel beam structure is surrounded by a surrounding plate and concrete is poured into this portion, and attention is paid to high strength.

[0004]

In the above-described method of surrounding the joint portion with the surrounding plate, the beam structure still penetrates the inside of the surrounding plate, and therefore, the column main reinforcement is required to be a beam steel frame such as H steel for construction. Will be sent to the four corners to avoid crossover. For this reason, it is possible to limit the number of bars that can be arranged on the column cross section by limiting the column main bar interval. Further, the shear reinforcement in the junction of the pillar structure and the beam structure may alternatively or through a hole in Ryou _et blanking, will be referred to as a directly fixed by welding to Ryou _et blanking, quite on the construction complicated Work.

Furthermore, since the lower side of the beam flange penetrating the joint between the column structure and the beam structure is horizontal, there is a possibility that a gap may be formed below the beam flange by breathing after concrete is cast. As a result, the stress cannot be smoothly transmitted between the column and the beam.

[0006] In view of the above points, the present applicant has filed a Japanese Patent Application No.
No. 69437 proposes an improved joining method, but the present invention is a further development of this method.

Namely, the bonding method in the previous proposal, by placing the junction c _d blanking inside the shroud of the section port type which is released in the vertical direction, steel of this junction c _d blanking the beam structure With the end of the enclosure via the surrounding plate and the joint flange, and arrange the main pillars in the internal space of the surrounding plate at regular intervals, and cast concrete into at least the inside of the surrounding plate and the pillar portion. To do,
Although the existence of the joint flange, such as the extension of the flange of the beam steel frame (H steel), itself can be said to have been improved,
Later studies have shown that it is undesirable when placing concrete and that it is desirable to further improve the stress transmission efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to clarify a method for joining dissimilar structural members and a column / beam joint structural member in which the above points are improved.

[0009]

A method for joining dissimilar structural members according to the present invention for achieving the above object is a method for joining a column structure made of reinforced concrete and a beam structure made of steel frames. A web having a height equal to or greater than the beam, a flange attached to an end of the web and having a height equal to or greater than the beam, and a flange attached to the upper and lower ends of the adjacent flanges, respectively. A joint structural material constituted by a stiffener plate connecting the mating flanges is arranged inside the column / beam joint, and an L-shaped surrounding plate is arranged between each of the adjacent flanges so as to be vertically Forming a cross-section mouth mold that is open in the direction,
The end of the steel structure of the beam structure is connected to the flange of the joint structural member, and a column main bar to which no hoop bar is attached is arranged in the internal space having a cross section formed by the L-shaped enclosure plate and the flange. It is characterized in that it is straightened and concrete is poured into the inner space of the mouth section. Further, a column / beam joint structural member according to the present invention that achieves the above object is a column / beam joint used in a column / beam joint that joins a column structure made of reinforced concrete and a beam structure made of steel. In the structural member, a web combined in a cross shape and having a height equal to or greater than the beam is connected to an end of the web and attached to an end of the web and having a height equal to or greater than the beam and the end of the steel structure having the beam structure. A joint structural member composed of a flange and a stiffener plate attached to the upper and lower ends of the adjacent flanges to connect the adjacent flanges, and a vertical member between the adjacent flanges of the joint structural member And four L-shaped enclosing plates which are respectively arranged so as to form a mouth opening in a direction.

[0010]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the method of the present invention will be described in detail with reference to specific examples.

FIGS. 1 to 3 show a method for joining dissimilar structural members according to the present invention to a case in which a column uses a reinforced concrete structure and a beam uses a steel structure as a steel frame structure. The joints of both structures are shown, and the illustration of the column reinforcing bars is omitted.

The illustrated embodiment is an example in which a joint with a column structure is constructed at a portion where H steels 10 to 13 as beams are orthogonal to each other, but in a joint at a corner of a building, only H steels 10 and 11 are used. However, H steels 10 and 12 are involved in the middle beam series position, and H steels 10 to 12 are involved in the middle beam 3 direction position.

Reference numeral 20 denotes an enclosing plate surrounding the column-beam joint, and the upper and lower sides are open.

Numeral 30 denotes a joint structural material, and webs 31 and
A flange 32 and a stiffener plate 33 attached to upper and lower ends of the flange 32 by welding.

The stiffener plate 33 may be made of an angle material or a bar material instead of a flat steel material as shown in the figure.

The end face of the flange 32 of the joint portion structural member 30 is fixed by welding to the ends of the flanges 14 and c _d Bed 15 H steel 10-13.

At the beam-column joint, the beam is 4
Not necessarily be connected to the direction, linearly in two directions, rectangular two directions, include three directions, in such a case, the joint structure member 30, does not require c _d Bed 31 and flanges 32 can be omitted.

Further, the joint structural member 30 may be formed by cutting and welding a flat steel material, or may be formed by cutting an I-shaped steel into a predetermined length and combining them. Of course, a mold material roll-formed into a shape as shown in the figure except for the stiffener plate 33 may be cut and used.

Further, the stiffener plate 33 may be mounted in a curved shape as shown in FIG.

In the embodiment described above, the surrounding plate 20 and the joint structural member 30 are set at the same height and slightly higher than the H steels 10 to 13. Is not limited to the same height, but the height of the joint part structural material 30 is not less than the beam height.
Preferably, the height of the joint structural member 30 is equal to +3
It is not more than 00 mm.

Although not shown, the column main reinforcement is arranged so as to penetrate the surrounding plate 20 which is open at the top and bottom, and the attachment of the hoop reinforcement is omitted in the joint. The shroud plate 20 does not need to constrain the column bar by itself.

Next, concrete casting is described.

First, the formwork for the pillar portion is continuous with the lower side of the enclosing plate 20 so as to be flush with the outer peripheral surfaces of four circumferences of the enclosing plate 20. At the beam-column joint, the flange 32 of 30 and the surrounding plate 20 also serve as a formwork for concrete casting. The formwork on the lower surface of the slab is arranged so as to face the upper end surface of the flange 14 of the H steels 10 to 13 and, after arranging the slab streaks, the slab concrete on the floor of the joint shown in the drawing, and
Concrete will be cast in the pillar structure on the lower side of the floor.

The cast concrete is also filled into the space in the surrounding plate 20 at the joint, and the concrete is solidified, and the column structure and the beam structure are firmly joined.

In place of the formwork supporting the lower surface of the slab concrete, a mold steel material for a shingle for supporting the slab is arranged on the upper surface of the H steels 10 to 13 and concrete is poured on the steel plate. It may be something.

Further, although not shown, a plurality of openings are provided in the enclosing plate 20, and a concrete frame is placed at a predetermined interval from the outer peripheral surface of the enclosing plate 20, and concrete is poured. A method for surrounding the entire joint including the surrounding plate 20 with concrete is also included in the present invention.

In the case where fire resistance is required in the structure, the surrounding plate 20 may be covered with a fire-resistant covering material, similarly to the beam.

[0028]

According to the method for joining dissimilar structural members and the column / beam joint structural member according to the present invention described above, H steel as a beam structural material does not exist at the joint between the column structure and the beam structure. ,
In particular, there is no member such as a flange that closes the upper and lower openings of the surrounding plate 20, and since no hoop is attached to the main pillar in the joint, the arrangement of the reinforcement and the joint is easy. In addition, there is an advantage that the surroundings of concrete at the time of placing concrete are improved.
In addition to the presence of 0, the presence of the joining portion structural material 30, particularly the presence of the stiffener plates attached to the upper and lower ends of the adjacent flanges and connecting the adjacent flanges, has the effect of making stress transmission extremely good. And solve the problems mentioned above.

[Brief description of the drawings]

FIG. 1 is a plan view of a column / beam joint to which the present invention is applied.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a perspective view of a column / beam joint to which the present invention is applied.

FIG. 4 is a plan view showing another embodiment.

[Explanation of symbols]

10 beam structure material (H steel) 11 beam structural member (H steel) 12 beam structural member (H steel) 13-beam structural member (H steel) 14- flange 15 c _d blanking 20- shroud 30- flange 33-stiffener plates c _d blanking 32- junction structural member joint structure member 31- junction structural member

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhide Sato 47-3 Mita, Atsugi-shi, Kanagawa Pref. Sato Industrial Co., Ltd. (72) Inventor Seichiro Yasuda 47-3 Mita, Atsugi-shi, Kanagawa Sato Industrial Co., Ltd. (72) Inventor Fumitaka Saito 47-3 Mita, Atsugi-shi, Kanagawa Prefecture Sato Industrial Co., Ltd. Central Technology Research Institute (56) References Shokai Sho 62-75105 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) E04B 1/16-1/24 E04B 1/30

Claims (2)

(57) [Claims] 1. A method of joining a column structure made of reinforced concrete and a beam structure made of steel, comprising a web combined in a cross shape and having a height equal to or greater than a beam, and an end of the web. And a stiffener plate which is attached to the upper and lower ends of the adjacent flanges and is connected to the adjacent flanges. An L-shaped surrounding plate is arranged between the adjacent flanges, and is formed inside the joint portion to form a cross-section opening that is open in the vertical direction. While connecting to the flange of the joint part structural material, the main bar with no hoop is attached to the internal space of the mouth opening section formed by the L-shaped surrounding plate and the flange,
A method for joining heterogeneous structural members, wherein concrete is poured into an internal space having a mouth section. 2. A column / beam joint structural member used for a column / beam joint that joins a column structure made of reinforced concrete and a beam structure made of steel, wherein the beam and the beam are combined in a cross shape and have a beam height. A web attached to an end of the web, a flange having a height equal to or greater than the beam and to which an end of a steel structure of a beam structure is connected, and attached to upper and lower ends of each adjacent flange. And a stiffener plate for connecting adjacent flanges to each other, and disposing each of the adjacent flanges of the joint structural material so as to form a vertically open cross-sectional die between the adjacent flanges. And an L-shaped enclosing plate formed as described above.