JPH0913498A - Building connection structure and structure connection unit - Google Patents

Abstract

PURPOSE: To disperse sections where stress is generated by making a resistance plate member connected to a side of a part of a beam of a cylindrical member which protrudes vertically more than its height resist when force is applied to the beam and burden a part of stress generated in each part. CONSTITUTION: A short beam 18 of a unit 10 is arranged in such a manner that it is extended in the direction orthogonal to each face of a column 22 for the column 22 and that an axial line of a steel pipe 12 agrees with an axial line of the column 22. Three column main reinforcement 24 are arranged at each of four corners of the column 22 in such a manner that they are embedded along the direction of length. Next, a column reinforcing bar 26 is wound around the column main reinforcement 24 in the horizontal direction. At this time, several column reinforcing bars 26 are inserted into a hole 20 formed in the short beam 18. Then, an end of the beam is integrally connected to a tip of the short beam 18. After that, concrete is placed to form a column which is continuous from the column 22. When force is applied in upper and lower sections of the beam, stress acts also in both end sections of the steel pipe 12 and a resistance plate 16a and is dispersed. Consequently, it is possible to prevent the generation of stress only in a part of concrete.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building structure of a mixed structure type using a column made of reinforced concrete and a beam made of steel frame, and a building connecting structure and a structure connecting unit relating to the connecting portion. It is about.

[0002]

2. Description of the Related Art In conventional building structures, all major structural members such as columns and beams have the same structure, that is, when reinforced concrete is used for the columns, the beams are also made of the same reinforced concrete and the columns are made of steel frames. If so, it was common to use the same structural type in which the beams are also composed of steel frames.

Therefore, recently, reinforced concrete having high compressive force is used for the columns, and the beam has excellent resistance to bending shearing force, and the weight of the beam itself can be reduced, so that a large space with a long span can be obtained. A mixed structural type that uses a combination of the advantages of each structural type using a steel frame suitable for obtaining is considered and implemented at a construction site.

[0004]

However, in the above-mentioned mixed structure type in which the columns of reinforced concrete and the beams of steel frames are combined, the connection between the columns and the beams becomes a problem. That is, as shown in FIG. 10, when the steel beam 101 is simply mechanically connected to the reinforced concrete column 103, a force is applied to the beam 101 from the outside, and the central portion of the beam 101 between a pair of adjacent columns 103 descends. When the beam 101 is about to be deformed as shown by the chain double-dashed line, a force to be deformed as shown by the chain double-dashed line is also applied to the connecting portion between the beam 101 and the column 103. As a result, the stress R concentrates on the corner A of the concrete that comes into contact with the beam 101, and in severe cases, the concentrated stress R may destroy the concrete part A.

In view of this, the present invention aims to disperse the stress generation points so that a large stress is not generated only in a part of the concrete when a force for bending the steel beam vertically is applied from the outside. An object is to provide a building connection structure and a structure connection unit.

[0006]

In order to solve the above problems, the present invention has the following configuration. (1) A building connection structure that forms a connection between a column formed of reinforced concrete and a beam formed of steel frame, the structure being arranged so as to extend coaxially with the axis portion of the column, and the side portion of the beam. A tubular member made of steel, the end portions of which are connected so that their longitudinal axes are orthogonal to each other, and which projects by a predetermined length in both up and down directions from the height dimension of the beam, and the beam of the tubular member. And a reaction force plate member having one plate-shaped side connected to side portions of portions protruding in both up and down directions from the height dimension of the cylinder member and arranged along the generatrix direction of the cylinder member, the cylinder member and the reaction plate member. An architectural connection structure in which is embedded in the concrete of the pillar.

(2) A structural connection unit provided between a column made of reinforced concrete and a beam made of steel frame, the structural connection unit being arranged so as to extend coaxially with the axis of the column, A tubular member made of steel having a length that projects a predetermined length in both up and down directions, and a plate-shaped side that is connected to the side of the portion of the tubular member that projects in both the up and down directions from the height of the beam Is a drag plate member arranged along the generatrix direction of the tubular member, and a short member of a predetermined length, one end of which is connected to the side of the tubular member and the other end of which is connected to the end of the beam. Structural connection unit equipped.

(3) Flange plate members are formed on both upper and lower ends of the tubular member, the upper lateral plate portion of the short member is connected to one of the flange plate members, and the short member is connected to the other of the flange plate members. A structural connection unit in which a lower horizontal plate portion of a member is connected, a vertical plate portion of the short member is connected to a side portion of the tubular member, and the other side of the drag plate member is connected to the flange plate member.

[0009]

According to the construction connecting structure having the above-described structure, mainly, a predetermined length portion that protrudes in both up and down directions from the height of the beam of the steel tubular member and the tubular member of the protruding length portion are formed. The drag plate members connected to the side parts resist the force applied from the outside to bend the steel beam in the vertical direction, and those places are one of the stresses generated in each part of the building connection structure. By bearing the portion, it is possible to prevent a large stress from being generated only in a part of the concrete as in the conventional case.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 are views showing an embodiment of a structural connection unit according to the present invention.

FIG. 1 is a view showing a structural connecting unit 10. At the center of this structural connection unit 10, the steel pipe 1
2 (cylindrical member) is arranged with its axis in the vertical direction. Flange plate members 14a and 14b are integrally provided by welding at both ends of the steel pipe 12, that is, at positions slightly closer to the center in the longitudinal direction than the upper and lower end faces of the steel pipe 12.

A short beam (short member) 18 extending in four radial directions is provided on the side of the steel pipe 12 (see FIG. 2). As shown in FIG. 3, the short beam 18 is the upper horizontal plate portion 18
a, a lower horizontal plate portion 18b and a vertical plate portion 18c, and the vertical plate portion 18c is provided with a plurality of holes 20 through which post-reinforcing columns 26 (see FIGS. 5 and 6) are inserted vertically. They are formed side by side.

As shown in FIG. 1, the upper horizontal plate portion 18a of the short beam 18 is the flange plate member 14a, the lower horizontal plate portion 18b is the flange plate member 14b, and the vertical plate portion 18c is the steel pipe 12.
Are integrally connected to the side portions of each by welding. This short beam 18 has the same material, cross-sectional shape, and dimensions as the steel beam 28 (see FIGS. 5 and 6) of the building structure, and is shortened to a predetermined length so that only the length is easy to handle. .

On the upper side of the flange plate member 14a in the drawing, a drag plate member 16a having the same height as the protruding height of the steel pipe 12 on the upper side of the flange plate member 14a in the drawing is welded on one side to the side portion of the steel pipe 12. The other side is fixed to the upper surface of the upper horizontal plate portion 18a of the flange plate member 14a and the short beam 18 by welding, and like the short beam 18, a total of four pieces are provided at four positions from the center of the steel pipe 12. It is provided. On the lower side of the flange plate member 14b in the figure, four reaction force plate members 16b having the same shape and size as the reaction force plate member 16a are similarly provided at the same positions.

Next, a description will be given of a first embodiment of a building connection structure for connecting a column of reinforced concrete and a beam formed of steel frame by using such a structure connection unit 10.

As shown in FIG. 4, the structural connecting unit 10 is attached to the pillar 22 formed of reinforced concrete.
The short beam 18 is arranged so that it extends in a direction orthogonal to each surface of the column 22, and the axis of the steel pipe 12 is aligned with the axis of the column 22. Each of the four corners of the pillar 22 has three pillar main bars 24.
The columns are arranged so as to be embedded along the length direction of the column 22.

Next, a plurality of column reinforcements 26 are horizontally wound around the twelve main columns 24 of the column 22. At this time, some of the plurality of column reinforcements 26 are
Through the plurality of holes 20 formed in. Then, as shown in FIG. 5, the ends of the steel beams 28 of the building structure are bolted (not shown) to the tips of the short beams 18 of the structural connection unit 10 via connecting plates (not shown). ) To connect integrally.

Beams 2 are attached to all the tips of the four short beams 18.
When the end portions of 8 are connected, a mold is attached around the structure connecting unit 10 (not shown), and concrete is poured into the mold to form a central portion of the structure connecting unit 10 as shown in FIG. A column that is continuous from the column 22 is formed so as to surround the column 22 and by four surfaces that are coplanar with the four surfaces of the column 22.

That is, together with the steel pipe 12, the flange plate members 14a and 14b, the drag plate members 16a and 16b, and the base end portions of the short beams 18, which constitute the central portion of the structural connection unit 10,
All of the column main reinforcements 24 and the column reinforcements 26 of the columns 22 will be embedded in the concrete to form the columns 22.
As described above, the beam 28, which is a building structure, is connected to all the ends of the short beam 18 by bolts.

In this way, in the first embodiment of the building connection structure using the structure connection unit 10, the steel beam 28
A force is applied from the outside to bend the
When a moment in the direction shown in FIG. 7 is applied to the short beam 18, such a moment causes the short beam 18 to move.
The stress R1 also acts on the concrete portion A immediately below and above the concrete portion A, but the stress R1 does not occur as large as in the conventional case.

This is because stress R2 and R3 act not only on the concrete portion A directly below or above the short beam 18 but also on the upper and lower end portions of the steel pipe 12 and the drag plate members 16a and 16b, so that many stresses are generated. This is because they can be dispersed in different places. Therefore, it is possible to prevent a large stress from being generated only in the concrete portion A directly below or above the short beam 18 and easily broken.

8 and 9 are views showing a second embodiment of the building connection structure according to the present invention. In the second embodiment of the building connection structure, the short beam 18 and the pillar 22 are shown in FIG.
A plate frame 31 (see FIG. 9) in which four plate members are formed in a rectangular frame shape so that the outer surface is flush with the surfaces of the columns 22 is provided between the middle upper end surface and the structure connecting unit 10. Steel pipe 1
2, drag plate member 16b, column main reinforcement 24, and column reinforcement reinforcement 26
It is provided around the.

The plate frame 30 similar to the plate frame 31 is provided above the short beam 18 at the same position.
This is different from the embodiment. Such plate frames 30, 31
By providing the above, it is possible to improve stress resistance and overall strength as compared with the building connection structure of the first embodiment.

In the above embodiment, the steel pipe having a circular cross section is used at the center of the structural connecting unit, but a cylindrical member having a polygonal cross section may be used.

In the above embodiment, the structural connecting unit 10 has four short beams 18 extending in all directions, but the number of short beams varies depending on the building structure and the place where the structural connecting unit is arranged. May be 4
It doesn't matter at least more than a book.

It is needless to say that the column main reinforcements 24 and the column reinforcements 26 in the above embodiment are not limited to a specific number and may be varied depending on the scale and the situation.

Although the short beam 18 of the structural connecting unit 10 has the same material, cross-sectional shape, and dimensions as the steel beam 28 of the building structure in the above-mentioned embodiment, the short beam 18 and the beam 28 are different from each other. In some cases, materials having different materials, cross-sectional shapes, and dimensions may be used as long as they can be connected to each other and there is no problem in strength.

Further, in the above-mentioned embodiment, the end of the steel beam 28 of the building structure is integrally connected to the tip of the short beam 18 by the bolt through the connecting plate. Besides, they may be connected via other connecting means such as welding or rivets.

In the above embodiment, the drag plate member 1
The case where 6a and 16b extend to the upper surface or the lower surface of the short beam 18 has been described.
When the size of the flange plate member 14a is large and 16b can sufficiently exert the function of the drag plate members 16a and 16b provided thereon, the length of the flange plate member 14a is set within the upper surface or the lower surface portion of the flange plate member 14a. Good.

In the above embodiment, the short beam 18 is provided with a plurality of holes 20 through which the column reinforcements 26 are inserted. However, the ends of the column reinforcements 26 are inserted into the short beams 18 via other members. It may be fixed by welding, or may be fixed via other fixing means.

Further, in the above-mentioned embodiment, the pillar 22 is formed up to an intermediate height first, and then the structural connecting unit 10 is arranged at a predetermined position, and then concrete is poured around the structural connecting unit 10 to make The case where the pillar 22 is formed so as to extend continuously to the pillar 22 that has been made has been described. However, after the structural coupling unit 10 is arranged at a predetermined position without first forming the pillar to an intermediate height, The whole of the pillar 22 may be formed by pouring concrete at a time.

[0032]

As described above, according to the present invention, a predetermined length portion that protrudes in both up and down directions from the height of the beam of the steel tubular member and the tubular member of the protruding length portion are mainly provided. The drag plate members connected to the side parts resist the force applied from the outside to bend the steel beam in the vertical direction, and those places are one of the stresses generated in each part of the building connection structure. By bearing the portion, it is possible to prevent a large stress from being generated only in a part of the concrete as in the conventional case.

Further, according to the second embodiment of the building connection structure, the stress resistance and the overall strength can be improved as compared with the case of the first embodiment.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a structural connecting unit according to the present invention.

2 is a plan view of the structural connection unit 10 shown in FIG. 1. FIG.

3 is a III-I of the structural connection unit 10 shown in FIG.
FIG. 11 is a sectional view taken along the line II.

FIG. 4 is a perspective view showing a first embodiment of a building connection structure using the structure connection unit 10 shown in FIG.

5 is a partial cross-sectional side view of the building connection structure shown in FIG.

6 is a cross-sectional view taken along the line VI-VI of the building connection structure shown in FIG.

FIG. 7 is a schematic diagram showing a stress generation state of the building connection structure shown in FIG.

FIG. 8 is a partial cross-sectional side view showing a second embodiment of the building connection structure according to the present invention.

9 is a cross-sectional view taken along the line IX-IX of the building connection structure shown in FIG.

FIG. 10 is a schematic view showing a stress distribution state of a conventional mixed structure type building connection structure.

[Explanation of symbols]

 10 Structural connection unit 12 Steel pipe 14a, 14b Flange plate member 16a, 16b Drag plate member 18 Short beam 18a Upper horizontal plate part 18b Lower horizontal plate part 18c Vertical plate part 20 Plural holes 22 Pillar 24 Pillar main bar 26 Pillar reinforcing bar 28 Beam 30, 31 Plate frame 101 Beam 103 Column A Corner of concrete R, R1, R2, R3 Stress

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsunobu Mitsunobu 1-38-6 Kameido, Koto-ku, Tokyo Daito Industry Co., Ltd.

Claims (3)

[Claims] 1. A building connection structure that forms a connection between a column formed of reinforced concrete and a beam formed of steel frame, the structure being arranged so as to extend coaxially with the axis of the column, and the side portion of the structure. Ends of the beams are connected to each other so that their longitudinal axes are orthogonal to each other, and a tubular member made of steel having a length projecting a predetermined length in both up and down directions from the height dimension of the beam; And a drag plate member having one plate-shaped side connected to side portions of a portion projecting in both up and down directions from the height dimension of the beam and arranged along the generatrix direction of the cylinder member, wherein the cylinder member and the drag force A building connection structure characterized in that a plate member is embedded in concrete of the pillar. 2. A structural connection unit provided between a column made of reinforced concrete and a beam made of steel frame, the structural connection unit being arranged so as to extend coaxially with an axial portion of the column and having a height of the beam. A tubular member made of steel having a length that protrudes by a predetermined length in both up and down directions, and a plate-shaped side that is connected to a side portion of a portion of the tubular member that protrudes in both up and down directions from the height dimension of the beam. A drag plate member arranged along a generatrix direction of the tubular member; and a short member having a predetermined length, one end of which is connected to a side portion of the tubular member and the other end of which is connected to an end of the beam. A structural connection unit characterized by the above. 3. A flange plate member is formed on each of the upper and lower ends of the tubular member, the upper lateral plate portion of the short member is connected to one of the flange plate members, and the short member is connected to the other of the flange plate members. 3. The lower horizontal plate portion is connected, the vertical plate portion of the short member is connected to the side portion of the tubular member, and the other side of the drag plate member is connected to the flange plate member. Structural connection unit described in.