JP2000054502A - Building unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the connection strength of a column-beam joint by butting a notched end face of a partly cut beam against the side face of a reinforcing column and connecting an end plate welded to the notched end face, to a backing plate welded to the side face of the reinforcing column, with bolts. SOLUTION: A beam-omitted building unit 10 has a framework structure in which columns 10, floor beams 12, and ceiling beams 13 are connected to shape a box. A part of the longitudinal side of a ceiling beam 13 is cut to form a partly cut ceiling beam 15, and a reinforcing column 17 and a reinforcing beam 18 are provided to compensate the reduction of strength of the notched part 16 of beam. In the column- beam connection 20 of the partly cut ceiling beam 15 and the reinforcing column 17, the notched end face 15A of the beam is butted against the side face part 17A of the reinforcing column 17, and rigidly connected with bolts 21. The reinforcing column 17 is formed of a square steel pipe and a backing plate 22 is welded to the rear side of one side face, and the partly cut ceiling beam 15 is made of C-shaped steel member, and an end plate 23 is welded to the notched end face 15A of the beam, and the backing plate 22 and the end plate 23 may be fastened to a female screw part 23A with bolts 21. In this way, the connection strength at the time when the reinforcing column is connected to the notched end of beam can be improved and stably kept.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a building unit.

[0002]

2. Description of the Related Art In a conventional unit building, Japanese Unexamined Patent Publication No.
As described in Japanese Patent Publication No. 17, when a staircase is provided on the upper and lower floors, the staircase may be applied to two horizontally adjacent building units in order to make the stairs gentle. In such a unit building, the stairwell spans two building units that are adjacent to each other in the horizontal direction. Will be omitted.

[0003] In the prior art, in a building unit in which a part of a ceiling beam is omitted as described above, a reinforcing column is added to a cut end of the ceiling beam to reinforce the frame strength of the building unit. And

As shown in FIG. 7, a conventional reinforcing column 1 is bolted to the lower end of a cut off end of a ceiling beam 2 so as to abut it. At this time, the reinforcing column 1 is welded to the joining plate 1A at the upper end thereof, and the joining plate 1A is formed into an inverted L-shape in which the joining plate 1A projects to one side with respect to the center axis of the column 1. It will be bolted to the lower surface by beam.

[0005]

However, in the prior art, the joining plate 1A of the reinforcing column 1 projects only on one side of the center axis of the reinforcing column 1, and the portion extending on one side of the joining plate 1A. Are bolt joints to the ceiling beam 2.
For this reason, the axial force F acting in the axial direction of the ceiling beam 2 causes the connection between the reinforcement column 1 and the ceiling beam 2 to be larger than that in which the both sides of the central axis of the reinforcement column 1 are bolted to the ceiling beam 2. The pillar 1 to open
Is bent in the direction B in FIG.
The desired joint strength cannot be secured at the beam joint.

SUMMARY OF THE INVENTION An object of the present invention is to improve the strength of a joint when a reinforcing column is joined to a beam-cut end of a partially-cut ceiling beam of a building unit.

[0007]

According to the first aspect of the present invention, a part of a beam of a building unit is cut off, and a reinforcing column is joined to a beam cut end of the partially cut off beam. The beam-cutting end face of the beam is cut off by abutting against the side face of the reinforcing column.

According to a second aspect of the present invention, in the first aspect of the present invention, a backing plate is further provided on a side surface of the reinforcing column, and a beam-cutting end surface of the partially-cut beam. , And a backing plate on the side surface of the reinforcing column and an end plate on the beam-cutting end surface of the partially cut-off beam are bolted together.

According to a third aspect of the present invention, in the second aspect of the present invention, the reinforcing column is made of a pipe material.
A backing plate is provided on a side surface of the reinforcing pillar that is in contact with the beam-cutting end surface of the partially cut-off beam, and a head or nut of a bolt is directly in contact with the backing plate. .

[0010]

According to the first aspect of the present invention, the following operations are provided. The beam-cutting end face of the partially cut-off beam was abutted against the side face of the reinforcing column, and bolted. Therefore, even if the reinforcing column is displaced by the axial force acting in the axial direction of the partially cut-off beam, the side surface portion of the reinforcing column and the beam-cutting end surface of the partially cut-off beam are united without being separated from each other. Displace. As a result, a desired joint strength can be ensured at the joint between the pillar and the beam without opening the joint between the reinforcing column and the partially missing beam.

According to the second aspect of the present invention, the following operations are provided. A backing plate was provided on the side surface of the reinforcing column that forms the column-beam joint (FIG. 3A). Therefore, even when the thickness of the reinforcing column is small, the rigidity of the side portion of the reinforcing column is increased, and the side portion of the reinforcing column is rotated around the bolt joint by the tensile axial force acting in the axial direction of the partially missing beam. Thus, the joint strength of the column-beam joint is stably maintained without causing local bulging (FIG. 3 (B)).

According to the third aspect of the present invention, the following operations are provided. The head or nut of the bolt was directly in contact with the backing plate of the reinforcing column (FIG. 3 (A)). Therefore, when the head or nut of the bolt abuts on the outer side surface portion of the reinforcing column that is in contact with the side surface portion that is in contact with the beam lacking end surface portion of the partially missing beam, the crush deformation of the outer side surface portion is prevented. There is no fear of inviting (FIG. 3C). Further, in order to avoid the crushing deformation, the spacer 3 having no gap (g) between the side surface portion of the reinforcing column that is in contact with the beam-cutting end surface portion of the partially cut-off beam and the outer side surface portion opposite thereto. (Fig. 3 (D)). That is, by directly contacting the head or nut of the bolt with the backing plate of the reinforcing column, a desired joint strength can be easily secured at the column-beam joint.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view showing a column-beam joint at the upper end of a column of a building unit, and FIG. 2 is a schematic view showing a bolt arrangement at the column-beam joint in FIG. FIG. 3 is a schematic diagram showing the operation and effect of the column-beam joint according to the present invention, and FIG.
Is a schematic diagram showing a column-beam joint at the lower end of the column, FIG. 5 is a schematic diagram showing another column-beam joint at the building unit, and FIG.
FIG. 7 is a schematic view showing a bolt-arranged state of a column-beam joint in FIG. 5, and FIG. 7 is a schematic view showing a conventional column-beam joint.

The building unit 10 with no beams shown in FIG.
A unit building is formed together with other building units, and is basically a skeleton structure in which columns 11, floor beams 12, and ceiling beams 13 are joined in a box shape. However, in the building unit 10 in which the beam is omitted, in order to form the stairwell 14 in the unit building constituted by the unit, one ceiling beam 13 is partially cut away by removing a part in the longitudinal direction. The ceiling beam 15 is used. And the building unit 1 without beams
In the case of No. 0, a reinforcing column 17 is provided between the beam cut end of the partially cut ceiling beam 15 and the floor beam 12 thereunder to compensate for the strength reduction due to the presence of the beam cut portion 16. Partial ceiling beam 15
A reinforcing beam 18 is provided between the beam lacking end of the above and another ceiling beam 13 on the side thereof.

The structure of the column-to-beam joint 20 between the partly omitted ceiling beam 15 and the upper end of the reinforcing column 17 will be described below. In the column-beam joint 20, as shown in FIG. 1 (B), the partially cut end beam 15 </ b> A of the partially cut ceiling beam 15 abuts against the side face 17 </ b> A of the upper end of the reinforcing pillar 17. Thus, the two members are rigidly connected by bolts 21 (high-strength bolts).

At this time, the reinforcing column 17 is formed of, for example, a square steel pipe, and the backing plate 22 is welded to the back of one side surface of the side surface portion 17A of the reinforcing column 17. In addition, the partially missing ceiling beam 15 is formed of, for example, a C-shaped steel, and the partially missing ceiling beam 1 is formed.
5, the end plate 23 is welded to the beam-missing end surface 15A. Then, the bolts 21 are provided on the end plate 23 so that the backing plate 22 of the side surface portion 17A of the reinforcing pillar 17 and the end plate 23 of the beam cut end surface portion 15A of the partially cut ceiling beam 15 are bolted. It is fastened to the screw portion 23A.

Further, a bolt through hole 17C is provided in an outer side surface portion 17B opposite to a side surface portion 17A which is in contact with the beam lacking end surface portion 15A of the partly-removed ceiling beam 15 in the reinforcing pillar 17,
The head 21A of the bolt 21 inserted through the bolt through hole 17C is directly in contact with the backing plate 22 of the reinforcing column 17.

As shown in FIG. 2A, bolts 21 are partially removed from the backing plate 22 of the side surface 17A of the reinforcing column 17 in the column-beam joint 20. After being inserted into the end plate 23 of the 15 beam-cutting end face portion 15A, the nut may be fastened to a nut 24 arranged on the back side of the end plate 23. In the column-beam joint 20, FIG.
As shown in (B), the bolt 21 is partially removed from the ceiling beam 15.
After being inserted into the end plate 23 of the beam lacking end surface portion 15A, the reinforcing member 17 may be fastened to a screw portion to be provided on the backing plate 22 of the side surface portion 17A of the reinforcing column 17.

FIG. 4 shows the structure of a column-beam joint 100 between the lower end of the reinforcing column 17 and the floor beam 12. When the end plate 101 welded to the lower end portion of the reinforcing column 17 is rigidly joined to the H-shaped steel floor beam 12 with bolts 102 (high-strength bolts), the end plate 101 Reinforced column 1
7 is an example in which a counterbore 104 is provided in each of the projecting portions 103 on both sides. The floor beam 12 is provided with stiffeners 105 at the joint with the reinforcing column 17. Although the head 102A of the bolt 102 may be accommodated in the counterbore 104 or the nut 102B may be accommodated in the counterbore 104, even when the plate thickness t is increased to increase the rigidity of the end plate 101, The protrusion dimension h of the bolt 102 from the end plate 101 can be minimized.

Therefore, according to the present embodiment, the following operations are provided. Reinforcement pillar 1 for partially missing end 15A of ceiling beam 15
7 was bolted by abutting against the side surface 17A. Therefore, even if the reinforcing column 17 is displaced by an axial force acting in the axial direction of the partially-removed ceiling beam 15, the side portion 17A of the reinforcing column 17 and the beam-removed end surface portion 15A of the partially-removed ceiling beam 15 are removed. Are displaced together without separating from each other. As a result, the connection between the reinforcing column 17 and the partly-removed ceiling beam 15 is not opened, and a desired connection strength can be secured in the column-beam joint 20.

A backing plate 22 is provided on the side surface 17A of the reinforcing column 17 constituting the column-beam joint 20 (FIG. 3).
(A)). Therefore, even when the plate thickness of the reinforcing column 17 is thin,
The rigidity of the side portion 17A of the reinforcing column 17 is increased,
7 does not locally bulge around the bolted joint due to the tensile axial force acting in the axial direction of the partially cut ceiling beam 15, and the joint of the column-beam joint 20 is not deformed. The mouth strength is maintained stably (FIG. 3 (B)).

The head or nut 24 of the bolt 21
Was directly brought into contact with the backing plate 22 of the reinforcing column 17 (FIG. 3A). Therefore, when the head 21 or the nut 24 of the bolt 21 abuts on the outer side portion 17B opposite to the side portion 17A of the reinforcing column 17 which is in contact with the beam lacking end surface portion 15A of the partially cut ceiling beam 15, Outer side 17
There is no danger of crushing deformation of B (FIG. 3C). Further, in order to avoid the crushing deformation, a gap is formed between the side surface portion 17A of the reinforcing pillar 17 which is in contact with the partially cut off end surface portion 15A of the ceiling beam 15 and the outer side surface portion 17B opposed thereto. There is no difficulty in construction such as providing the spacer 3 without g) (FIG. 3D). That is, the head or nut 24 of the bolt 21 is attached to the backing plate 22 of the reinforcing column 17.
The desired contact strength can be easily secured to the column-beam joint 20 by directly contacting the joint 20 with the column.

In the building unit 10 without beams,
At an assembly manufacturing stage such as joining the partially-cut ceiling beam 15 and the reinforcing column 17, the partially-cut ceiling beam 15 between the columns 11 and 11 facing each other with the partially-cut ceiling beam 15 sandwiched in the axial direction. In order to secure the assembly dimensional accuracy of the building unit 10 such as the linearity, a temporary beam 31 is temporarily installed in the beam lacking portion 16. Therefore, it comes into contact with the beam lacking portion 16 of the beam omitted building unit 10 1
The structure of the column beam-to-column joint 40 of the ceiling beam 13 and the temporary beam 31 for the column 11 located at one corner will be described.

In the column-beam joint 40, as shown in FIG. 5, the column 11 is formed of, for example, a square steel pipe, and a cross section is formed on the back side of two intersecting side portions 11A and 11B of the column 11. L
The backing plate 41 of the mold is welded (the backing plate 41 can be an integrally formed product made of hot extruded steel or cast steel or a welded product made of a flat steel material). On the other hand, an end plate 42 is welded to the end surface 13A of the ceiling beam 13 and an end plate 43 is welded to the end surface 31A of the temporary beam 31. Then, the end plate 42 of the end face portion 13A of the ceiling beam 13 is
1 is fastened to the backing plate 41 on the back side of the side surface portion 11A, and the end plate 43 of the end surface portion 31A of the temporary beam 31 is
The first side portion 11B is fastened to the backing plate 41 on the back side.

At this time, the bolts 44 and 45 are
As shown in (A), the ceiling beam 13, the end plate 42 of the temporary beam 31,
After being inserted into the column 43, it can be fastened to a screw portion to be provided on the backing plate 41 on the back side of the side surfaces 11 </ b> A and 11 </ b> B of the column 11. As shown in FIG. 6 (B), bolt insertion holes 46A, 46B provided in the side surfaces 11C, 11D outside the pillar 11 are provided.
The bolts 44 and 45 inserted into the pillar 11 from the
1 to the ceiling beam 1 from the backing plate 41 of the side portions 11A and 11B.
3. After being inserted through the end plates 42, 43 of the temporary beam 31, they may be fastened to nuts 47, 48 arranged on the back side of the end plates 42, 43.

In the building unit 10 where the beams are omitted, the beam-to-column joints of the ceiling beams 13 and the partially omitted ceiling beams 15 with respect to the columns 11 located at three corners which do not contact the beam lacking portion 16 are provided. As the structure of the mouth, the same structure as that of FIGS. 5 and 6 can be adopted.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, according to the present invention, a part of a floor beam of a building unit is chipped, and a reinforcing column is joined to a beam split end of the floor beam. Butting and bolting may be used.

[0028]

As described above, according to the present invention, it is possible to improve the strength of the joint when reinforcing columns are joined to the beam-cutting ends of the partially cut ceiling beams of the building unit.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a column-beam joint at an upper end of a column of a building unit.

FIG. 2 is a schematic view showing a bolt arrangement state of a column-beam joint in FIG. 1;

FIG. 3 is a schematic view showing the operation and effect of the column-beam joint according to the present invention.

FIG. 4 is a schematic view showing a column-beam joint at a column lower end side.

FIG. 5 is a schematic diagram showing another pillar-beam joint of the building unit.

FIG. 6 is a schematic view showing a bolt arrangement state of a column-beam joint in FIG. 5;

FIG. 7 is a schematic view showing a conventional column-beam joint.

[Explanation of symbols]

 10 Building Unit 13 Ceiling Beam 15 Partially Missing Ceiling Beam 15 Beam Missing Part 15A Beam Missing End Face 17 Reinforcement Column 17A Side Part 20 Column-Beam Joint Portion 21 Bolt 22 Backing Plate 23 End Plate

Claims (3)

[Claims] 1. A part of a beam of a building unit is cut off, a reinforcing column is joined to a beam cut end of the partially cut beam, and a beam cut end surface of the partially cut beam is connected to the reinforcing column. A building unit characterized by being bolted against the side. 2. A backing plate is provided on a side surface of the reinforcing column, and an end plate is fixed to a beam-cutting end surface of the partially-removed beam. 2. The building unit according to claim 1, wherein the partially cut beam is bolted to an end plate at a beam cut end surface. 3. The reinforcing column is made of a tubular material, and a backing plate is provided on a side portion of the reinforcing column in contact with a beam-cutting end surface of the partially-cut beam, and a head or nut of a bolt is attached to the backing plate. 3. The building unit according to claim 2, wherein the building unit comes into direct contact with the board.