JP4420762B2 - Unit building - Google Patents

Description

  The present invention relates to a unit building.

When a staircase or the like is provided in the interior of a unit building, as described in Patent Document 1, a cut portion defined on one end side of the side-by-side ceiling beams adjacent to each other on the left and right sides is cut and the ceiling beam Is a cut ceiling beam, and the cut portion of the side-by-side ceiling beam is a blow-off portion.
JP-A-62-272317

In the unit building of Patent Document 1, in order to compensate for the strength reduction of each building unit due to the cutting of the ceiling beam, the reinforcing column and the reinforcing beam are joined to the cut end of the cut ceiling beam in each building unit. Standing on the middle part of the floor beam below the cut ceiling beam, the reinforcing beam is connected to the middle part of the standard ceiling beam on the side of the cut ceiling beam. For this reason, a reinforcement pillar stands in the center side side of the atrium part of the adjacent lower floor building unit, and the floor plan restriction of the lower floor is generated.

An object of the present invention is to form an atrium portion that extends between adjacent building units without causing a floor plan restriction of unit buildings.

The invention according to claim 1 is a unit building in which a plurality of building units composed of a frame structure in which columns and beams are joined are installed adjacent to each other in the left-right and up-down directions. When the ceiling beam opposite to the above-mentioned cut ceiling beam of each lower floor building unit is a standard ceiling beam by cutting the cut portion defined on one end side of each lower floor building unit, The middle part of the standard ceiling beam is connected with a long span beam, the cut end of the cut ceiling beam of each lower floor building unit is joined to the side surface of the middle part of the cross beam, and mounted on each lower floor building unit The upper floor building unit is configured such that the floor beam is not provided at least in the portion corresponding to the cut portion of the ceiling beam of the lower floor building unit.

According to a second aspect of the present invention, in the first aspect of the present invention, the portion corresponding to the cut portion of the cut ceiling beam of the floor beam of the upper floor building unit corresponding to the cut ceiling beam of the lower floor building unit is further cut. The floor beam is a cut floor beam, and the cut end of the cut floor beam of the upper floor building unit is joined to the upper surface of the intermediate portion of the cross beam.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the cut ceiling beam of the lower floor building unit intersects a standard ceiling beam facing the cut ceiling beam and both ends of the cut ceiling beam. A horizontal brace is stretched on a ceiling surface partitioned by a ceiling beam and a passing beam.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, when the cut portions of the adjacent ceiling beams of adjacent lower floor building units are provided on the outer wall side, the outer walls of both lower floor building units Reinforced ceiling beams are bridged between the heads of the columns facing the side.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the cut portions of the adjacent ceiling beams of the adjacent lower floor building units are used as a blow-off portion.

(Claims 1 and 5)
(a) To compensate for the strength reduction of each lower-floor building unit due to cutting the ceiling beam, connect the middle part of the standard ceiling beam of both lower-floor building units with a crossing beam, and pass the cut end of the cut ceiling beam Joined to the middle part of the beam. For this reason, the studs that support the cut ceiling beams of the adjacent lower-floor building units do not stand in the middle of the adjacent floor beams of the lower-floor building units, and are lined up without creating floor plan restrictions on the lower floors. A blow-off portion can be formed at the cut portion of the cut ceiling beam.

(Claim 2)
(b) When the upper floor building unit has a floor beam and the floor beam of the upper floor building unit corresponding to the cut ceiling beam of the lower floor building unit is a cut floor beam, the cut end of the cut floor beam is By joining to the middle part of the cross beam provided in the lower building unit (a) described above, the upper building unit can be easily reinforced.

(Claim 3)
(c) In lower-floor building units with cut ceiling beams, horizontal braces are installed on the ceiling surface including cut ceiling beams and cross beams to reinforce strength reduction of lower-floor building units due to the provision of cut ceiling beams. it can.

When the adjacent cut ceiling beams of adjacent lower floor building units are installed on the outer wall side, the wind pressure acting on the outer wall is applied to the columns and standard ceiling beams of each lower floor building unit through the ceiling surface reinforced by horizontal braces. Transmitted and supported.

(Claim 4)
(d) When the cut parts of the adjacent cut ceiling beams of adjacent lower floor building units are provided on the outer wall side,
The wind pressure acting on the outer wall is transmitted to and supported by the pillars and standard ceiling beams of each lower building unit through the reinforced ceiling beams spanned between the pillars of the lower floor building units.

1 shows a unit building of Example 1, (A) is a plan view showing a lower floor ceiling surface, (B) is a plan view showing an upper floor surface, and FIG. 2 is taken along line II-II in FIG. FIG. 3 is an arrow view along the line III-III in FIG. 2, FIG. 4 is a side view showing a reinforced ceiling beam joint structure, and FIG. 5 is a cross-sectional view showing a basic joint structure.
FIG. 6 is a front view showing a diagonal reinforcement structure, FIG. 7 shows a unit building of Example 2, (A) is a plan view showing a lower floor ceiling surface, (B) is a plan view showing an upper floor surface, FIG. 8 is a cross-sectional view showing the adjacent column joint structure.

Example 1 (FIGS. 1 to 6)
FIG. 1 shows a part of a unit building 1 in which a plurality of factory-produced building units 10 are installed adjacent to each other on the left and right, and the lower floor building units 10A and 10A adjacent to the left and right and the upper floor building above the same. The part which forms the ventilating part 2, such as the stairwell chamber over the units 10B and 10B, is shown.
FIG. 1 (A) shows the lower floor ceiling, and FIG. 1 (B) shows the upper floor.

A standard building unit 10 is a frame structure (ramen frame) in which square steel pipe columns 11, a shaped steel floor beam 12 such as C-shaped steel, and a shaped steel ceiling beam 13 such as C-shaped steel are joined in a rectangular parallelepiped shape. Consists of. However, the floor beam 12 can be omitted.

(A) Structure of the lower-floor building unit 10A In the unit building 1, the adjacent lower-floor building units 10A and 10A are arranged as a ceiling beam 1
3 is cut to form a ceiling beam 13A. And the ceiling beam 13 opposite to the cut ceiling beam 13A of each lower floor building unit 10A
Is the standard ceiling beam 13, the middle parts of the standard ceiling beams 13 of the lower floor building units 10 </ b> A and 10 </ b> A are connected by a long steel beam 21 such as an I-shaped steel. The cut end of the cut ceiling beam 13A of each lower floor building unit 10A is joined to the portion.

As shown in FIG. 2, the cross beam 21 and the standard ceiling beam 13 are connected to both web surfaces at both ends of the cross beam 21 by connecting one side of the L-shape of the L-shaped connection hardware 22 with bolts 22 </ b> A. The other piece is joined by connecting it to the middle part of the standard ceiling beam 13 with a bolt 22B.

As shown in FIGS. 2 and 3, the connecting beam 21 and the cut ceiling beam 13 </ b> A are connected to one side of the intermediate web of the connecting beam 21 by an L-shaped piece of the L-shaped connecting metal 23 with a bolt 23 </ b> A.
The other L-shaped piece 3 is connected to the cut end of the cut ceiling beam 13A by a bolt 23B.

The lower-floor building unit 10A is used for joining the cross beam 21 during the factory production stage to the on-site installation process.
The cut portion 13 of the cut ceiling beam 13A until the cut ceiling beam 13A is joined to the passing beam 21.
B is provided with temporary beams, temporary columns 11A (FIG. 3) are provided immediately below the cut ends of the cut ceiling beams 13A, and then these temporary beams and temporary columns 11A are removed.

Further, in the adjacent lower-floor building units 10A and 10A, a column omitting portion that removes the column 11 located at the intersection of the cut portion 13B of the cut ceiling beam 13A and the standard ceiling beam 13 is omitted. As shown in FIG. 4, a section steel such as a long C-shaped steel is formed between the capital of the pillar 11 of one lower-floor building unit 10A and the pillar 11 of the other lower-floor building unit 10A. A reinforced ceiling beam 24 is bridged. Both ends of the reinforced ceiling beam 24 are connected to the pillars 11 of the lower floor building unit 10A.
The intermediate portion of the reinforced ceiling beam 24 is attached to the standard ceiling beam 13 and is bolted. Adjacent lower floor building units 10A, 10A can form a column omission surface across both units,
A large opening or the like can be provided.

The lower-floor building unit 10A provides a temporary column in the column omitted portion from the factory production stage to the joining of the reinforced ceiling beam 24 in the field installation process, and then removes the temporary column.

However, the lower floor building unit 10A includes the following reinforcing structure in order to compensate for the strength reduction of the ramen frame due to the provision of the cut ceiling beam 13A.

(1) Additional structure of horizontal brace The cut ceiling beam 13A of the lower-floor building unit 10A includes a standard ceiling beam 13 opposed to the cut ceiling beam 13A, a ceiling beam 13 intersecting with both ends of the cut ceiling beam 13A, and X-shaped horizontal braces 25A and 25B are stretched on the ceiling surface partitioned by the transfer beam 21. The horizontal brace 25 </ b> A is connected to each of the pillars 11 and the intersections of the cut ceiling beam 13 </ b> A and the cross beam 21. The horizontal brace 25 </ b> B is connected to each of the pillar 11 and the intersection of the standard ceiling beam 13 and the cross beam 21.

(2) Basic joint structure (Fig. 5)
The column base of the column 11 to which the cut ceiling beam 13A is bonded is rigidly bonded to the foundation 26. Foundation 26 is
As shown in FIG. 4, a steel base structure 27 fixed by anchor bolts 26 </ b> A is provided, and a plurality of steel mounting hardware 27 </ b> A are fixed to the base structure 27 by welding. At the time of installing the lower floor building unit 10A to the foundation 26, the mounting bracket 28 welded to the column base of the column 11 is fastened to the mounting hardware 27A of the foundation structure 27 with the high-strength bolt 28A. Rigidly joins the foundation 26.

(3) Diagonal reinforcement structure (Fig. 6)
A diagonal member 29 is provided between the column base of the column 11 of the lower-floor building unit 10 </ b> A and the intermediate portion of the ceiling beam 13. The diagonal member 29 is pin-bonded to each of the column base of the column 11 and the intermediate portion of the ceiling beam 13. Pillar 11
And a right-angled triangle formed by a part of the ceiling beam 13 together with the diagonal member 29 (undeformed truss)
The apparent length of the ceiling beam 13 in the lower-floor building unit 10A (the length excluding the undeformed truss portion from the total length of the ceiling beam 13) is shortened to enhance the frame rigidity and improve the proof strength against horizontal loads. .

(B) Structure of Upper Floor Building Unit 10B The upper floor building unit 10B mounted on the lower floor building unit 10A is the floor beam 12 of the upper floor building unit 10B corresponding to the cut ceiling beam 13A of the lower floor building unit 10A. The portion corresponding to the cut 13B of the cut ceiling beam 13A is cut, and the floor beam 12 is cut into the cut floor beam 12A.
And

The cut end of the cut floor beam 12A of the upper floor building unit 10B is joined to an intermediate portion of the transfer beam 21 provided in the lower floor building unit 10A. That is, as shown in FIGS. 2 and 3, the cut end of the cut floor beam 12 </ b> A is mounted on the intermediate portion of the cross beam 21, and the lower flange of the cut floor beam 12 </ b> A is connected to the upper flange of the cross beam 21 by the bolt 31. Be joined.

The upper floor building unit 10B is provided with a temporary beam at the cut portion 12B of the cut floor beam 12A from the factory production stage to the joining of the cut floor beam 12A to the transfer beam 21 in the field installation process, and then the temporary beam. To remove.

Further, in the adjacent upper-floor building units 10B and 10B, a column omitting portion for removing the column 11 located at the intersection of the cut portion 12B of the cut floor beam 12A and the standard floor beam 12 is omitted. The column base of the pillar 11 of one upper-floor building unit 10B across the section and the other upper-floor building unit 1
A reinforced floor beam 32 made of a long steel such as C-shaped steel is bridged between the column base of the column 11 of 0B.
Both ends of the reinforcing floor beam 32 are bolted to the pillars 11 of the upper floor building units 10B, and an intermediate portion of the reinforcing floor beam 32 is bolted to the standard floor beam 12. Adjacent upper floor building unit 1
0B and 10B can form a column omitting surface across both units, and can be provided with a large opening or the like.

In addition, the upper floor building unit 10B provides a temporary column in the column omitted portion from the factory production stage to the joining of the reinforcing floor beam 32 in the field installation process, and then removes the temporary column.

(C) Unit building 1
Therefore, in the unit building 1, the upper floor building units 10B are mounted on the adjacent lower floor building units 10A and 10A, and the cut portions of the cut ceiling beams 13A arranged side by side in the lower floor building units 10A and 10A. Let 13B and the cut part 12B of the cut floor beam 12A lined up in the upper floor building units 10B and 10B be the blowout part 2. That is, the cross beam 21 and the reinforced ceiling beam 2
4. The lower floor building units 10A and 10A and the upper floor building units 10B and 10B adjacent to each other between the reinforcing floor beams 32 and the adjacent upper floor building units 10B and 10B.
A space continuous above and below B is used as a blow-off portion 2, and a gently inclined staircase can be installed in the blow-off portion 2 long in the left and right in this plan view.

Further, in the unit building 1, the cut portions 13B of the adjacent cut ceiling beams 13A of the adjacent lower floor building units 10A, 10A and the cut floor beams 12A of the adjacent upper floor building units 10B, 10B are arranged side by side. When the cut portion 12B is provided on the outer wall side, the lower floor building unit 10A,
A reinforced ceiling beam 24 is bridged between the column heads of the columns 11 facing the outer wall side of 10A, and a reinforced floor beam 32 is bridged between the column bases of the columns 11 facing the outer wall sides of the lower floor building units 10B, 10B. It becomes. By reinforcing the weak axes of the cross sections of the reinforced ceiling beam 24 and the reinforced floor beam 32, wind pressure acting on the outer wall can be received by the reinforced ceiling beam 24 and the reinforced floor beam 32.

According to the present embodiment, the following operational effects can be obtained.
(a) In order to compensate for the strength reduction of each lower-floor building unit 10A due to the cutting of the ceiling beam 13, the intermediate part of the standard ceiling beam 13 of both lower-floor building units 10A is connected by a crossing beam 21, and the cut ceiling beam The cut end of 13A was joined to the intermediate part of the cross beam 21. For this reason, the studs that support the cut ceiling beams 13A of the adjacent lower-floor building units 10A do not stand in the middle part of the floor beams 12 in which the lower-floor building units 10A are lined up. The blow-through portion 2 can be formed by the cut portions 13B of the cut ceiling beams 13A arranged side by side.

(b) The upper-floor building unit 10B has the floor beam 12, and the lower-floor building unit 10
The floor beam 12 of the upper floor building unit 10B corresponding to the cut ceiling beam 13A of A is cut to the floor beam 12
When A is assumed, the upper floor building unit 10B can be easily reinforced by joining the cut end of the cut floor beam 12A to the intermediate portion of the cross beam 21 provided in the lower floor building unit 10A described above (a). .

(c) In the lower floor building unit 10A having the cut ceiling beam 13A, the cut ceiling beam 13
By providing horizontal braces 25A and 25B on the ceiling surface including A and the cross beam 21, the strength reduction of the lower floor building unit 10A due to the provision of the cut ceiling beam 13A can be reinforced.

(d) When the cut portions 13B of the adjacent cut ceiling beams 13A of the adjacent lower floor building units 10A are provided on the outer wall side, the wind pressure acting on the outer walls is bridged between the heads of the columns 11 of both lower floor building units 10A. The pillar 11 of each lower floor building unit 10A, the standard ceiling beam 2 through the reinforced ceiling beam 13 passed
4 to be supported.

Example 2 (FIGS. 7 and 8)
In Example 2 of FIG. 7, the standard building unit 10 is installed adjacent to each of the adjacent lower floor building units 10A, 10A, and the standard building unit 10 is adjacent to each of the adjacent upper floor building units 10B, 10B. It is installed, and the atrium part 2 is formed across the adjacent lower-floor building units 10A and 10A and the upper-floor building units 10B and 10B. FIG. 7 (A) shows the lower floor ceiling surface, and FIG. ) Indicates the upper floor.

(A) Structure of Lower Floor Building Unit 10A The lower floor building unit 10A of the second embodiment is different from the lower floor building unit 10A of the first embodiment in that the cut portion 13B of the cut ceiling beam 13A and the standard ceiling beam 13 intersect. This is because the column 11 located in the section is not removed and the column omission portion is not provided in this portion, and thus the reinforcing ceiling beam 24 is not provided.

The standard building unit 10 is installed adjacent to the side of the standard ceiling beam 13 that intersects the cut portion 13B of the cut ceiling beam 13A in the lower floor building unit 10A. This standard building unit 10 has an X-shaped horizontal brace 41A on the ceiling surface surrounded by four ceiling beams 13;
41B is stretched.

(1) Horizontal brace addition structure, (2) Foundation joint structure, adopted in the lower floor building unit 10A of Example 1 as the reinforcement structure of the ramen frame by providing the cut ceiling beam 13A in the lower floor building unit 10A ( 3) In addition to the diagonal reinforcement structure, the following adjacent column reinforcement structure utilizing the existence of the standard building unit 10 can be adopted.

As shown in FIG. 8, bolt insertion holes 43A and 43A are coaxially provided on the opposite side walls 42A and 42A of the adjacent columns 1 and 11 of the adjacent lower floor building units 10A and 10, respectively, and one column 11 A bolt mounting operation hole 43B is provided on the side wall 42B on the back side of the side wall 42A provided with the bolt insertion hole 43A, and a nut mounting operation is provided on the side wall 42B on the back side of the side wall 42A provided with the bolt insertion hole 43A of the other tube pillar 11. A hole 43C is provided. And adjacent building unit 10
A hole 10 is installed on the foundation, and a perforated spacer 44 disposed coaxially with the bolt insertion holes 43A and 43A provided on the opposite side walls 42A and 42A of the columns 11 and 11 arranged side by side is provided on the side walls 42.
A, provided in the gap between 42A. The bolt 45 inserted from the bolt mounting operation hole 43B provided in the side wall 42B of the one pillar 11 is inserted between the bolt insertion holes 43A and 43A of both the pillars 11 and 11, and the side walls 42A and 42A facing each other. It is inserted through the bolt insertion hole of the perforated spacer 44 provided in the gap. A nut 46 inserted from a nut mounting operation hole 43 </ b> C provided in the side wall 42 </ b> B of the other column 11 is screwed to the bolt 45. The bolt 45 is a high-strength bolt, which is a torcia-type high-strength bolt in the present embodiment, and a nut 46 is inserted into the nut mounting operation hole 43 </ b> C and the nut 46 is fastened to the bolt 45.

(B) Structure of Upper Floor Building Unit 10B The upper floor building unit 10B of the second embodiment is different from the upper floor building unit 10B of the first embodiment in that the cut portion 12B of the cut floor beam 12A and the standard floor beam 12 intersect. This is because the column 11 located in the section is not removed and the column omission portion is not provided in this portion, and thus the reinforcing floor beam 32 is not provided.

The standard building unit 10 is installed adjacent to the side of the standard floor beam 12 that intersects the cut portion 12B of the cut ceiling beam 12A in the upper floor building unit 10B.

(C) Unit building 1
Therefore, in the unit building 1 of the second embodiment, the adjacent lower floor building units 10A, 10A, 10
Each upper-floor building unit 10B is mounted on A, and cut portions 13B of cut ceiling beams 13A aligned in the lower-floor building units 10A and 10A and cut floor beams 12A aligned in the upper-floor building units 10B and 10B. Let the part 12B be the blow-by part 2. That is, on the side of the anti-cut floor beam 12A and the anti-cut ceiling beam 13A of the cross beam 21, the lower floor building unit 10A adjacent to the left and right.
10A, a space extending from the lower floor building unit 10A to the upper floor building unit 10B in the up-and-down direction over the adjacent upper-floor building units 10B and 10B. A gently inclined staircase can be installed in the atrium 2.

Further, in the unit building 1, the base end of the adjacent cut floor beam 13A of the adjacent lower floor building units 10A and 10A and the adjacent cut floor beam 12A of the adjacent upper floor building units 10B and 10B are provided. The proximal end can be provided on the outer wall side. At this time, the cut portion 13B of the cut ceiling beam 13A in the lower floor building unit 10A and the cut portion 12B of the cut floor beam 12A in the upper floor building unit 10B are located on the inner wall side of the unit building 1.

According to the present embodiment, in addition to the operations and effects (a) to (c) of the first embodiment, the following operations and effects can be achieved.
When the adjacent cut ceiling beams 13A, 13A of the adjacent lower floor building units 10A, 10A are provided on the outer wall side, the wind pressure acting on the outer wall is caused by the horizontal brace 25 of the lower floor building unit 10A.
It is transmitted to and supported by the pillar 11 and the standard ceiling beam 13 of the lower floor building unit 10A through the ceiling surface reinforced by A and 25B.

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 even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

FIG. 1 shows a unit building of Example 1, (A) is a plan view showing a lower-floor ceiling surface, and (B) is a plan view showing an upper-floor floor surface. FIG. 2 is an arrow view taken along line II-II in FIG. FIG. 3 is a view taken along the line III-III in FIG. FIG. 4 is a side view showing a reinforced ceiling beam joint structure. FIG. 5 is a cross-sectional view showing the basic joint structure. FIG. 6 is a front view showing the diagonal member reinforcing structure. FIG. 7 shows a unit building of Example 2, (A) is a plan view showing a lower floor ceiling surface, and (B) is a plan view showing an upper floor surface. FIG. 8 is a cross-sectional view showing the adjacent column joint structure.

Explanation of symbols

1 unit building 2 atrium 10 building unit 10A lower floor building unit 10B upper floor building unit 11 pillar 12 floor beam 12A cut floor beam 12B cut portion 13 ceiling beam 13A cut ceiling beam 13B cut portion 21 crossing beam 24 reinforcing ceiling beam 25A, 25B horizontal brace

Claims (5)

In a unit building where a plurality of building units consisting of a frame structure joined with columns and beams are installed adjacent to each other on the left, right, top and bottom,
A ceiling beam opposite to the cut ceiling beam of each lower floor building unit by cutting a cut portion defined on one end side of the adjacent ceiling beam of the lower floor building units adjacent to each other on the left and right to make the ceiling beam a cut ceiling beam Is the standard ceiling beam, the middle part of the standard ceiling beam of both lower floor building units is connected by a long cross beam, and the cut ceiling beam of each lower floor building unit is cut on the side of the middle part of the cross beam Join the ends,
A unit building in which an upper-floor building unit mounted on each lower-floor building unit does not provide a floor beam at least in a portion corresponding to the cut portion of the ceiling beam of the lower-floor building unit. Cutting the portion of the floor beam of the upper floor building unit corresponding to the cut ceiling beam of the lower floor building unit corresponding to the cut portion of the cut ceiling beam to make the floor beam a cut floor beam;
The unit building according to claim 1, wherein a cut end of the cut floor beam of the upper floor building unit is joined to an upper surface of an intermediate portion of the cross beam.   A horizontal brace is formed on a ceiling surface defined by the cut ceiling beam of the lower-floor building unit by a standard ceiling beam facing the cut ceiling beam, and a ceiling beam and a crossing beam that intersect each of both ends of the cut ceiling beam. The unit building according to claim 1 or 2, wherein the unit building is stretched.   The reinforcing ceiling beams are bridged between the column heads of the columns facing the outer wall sides of both lower-floor building units when the cut portions of the adjacent ceiling beam of the adjacent lower-floor building units are provided on the outer wall side. A unit building according to any of the above.   The unit building according to any one of claims 1 to 4, wherein a cut portion of a ceiling beam in which the adjacent lower-floor building units are arranged side by side is a blow-off portion.

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