JP3769401B2 - Building unit and unit building - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a building unit and a unit building configured in a box shape by connecting beams and columns.
[0002]
[Prior art]
As shown in FIG. 2, a building unit used in a conventional unit building or the like has a rectangular box shape in plan view by connecting steel beams 12, 13, 14, 15 and a column 11. . As shown in FIG. 4, the pillars 11 at the four corners are in the form of a square cylinder with one side length equal to or less than the gap between the outer wall and the inner wall (see, for example, Japanese Patent Laid-Open No. 55-39549).
However, the conventional building unit structure can be applied only to low-rise buildings (3 floors or less) with the above-mentioned square cylinder column, and buildings with severe structural restrictions such as heavy snow areas. There were problems that could not be applied.
[0003]
For example, in JP-A-5-171688, a reinforced steel pipe 2B in which a long steel pipe 2b is provided inside a solid steel material 2A or a square steel pipe 2a is used as a column as shown in FIG. Therefore, it is disclosed as a housing unit structure that can obtain sufficient structural strength even under severe conditions such as a mid-rise building or heavy snowfall area (Prior Art 1).
[0004]
Further, for example, in Japanese Patent Laid-Open No. 5-31757, the sectional shape of the pillar 11A at the four corners is not changed without changing the overall dimensional ratio of the building unit as shown in FIG. 5 and without increasing the thickness of the steel material. It is disclosed that the structural strength against a horizontal load in the length direction in a rectangular parallelepiped building unit is improved by changing the shape to a rectangle (Prior Art 2).
[0005]
[Problems to be solved by the invention]
The unit structure of the above prior art 1 has a problem that the use of the steel material increases, there is a problem of cost increase due to fixing such as welding, and there is a problem that it is not efficient for improvement of bending rigidity and bending strength. It was.
[0006]
The building unit of the above prior art 2 has rectangular cross-sectional shapes at the four corners, so that the secondary moment in the longitudinal direction is increased, the structural strength is improved, and the structural mechanical balance is improved. However, it is still not enough when bending rigidity and bending strength are required.
[0007]
Accordingly, the present invention provides a building unit and a unit that have improved bending rigidity and bending strength by using a column that fits within a wall without changing the dimensional ratio of the building unit and without increasing the thickness of the steel material. To provide a building.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a building unit configured by connecting four pillars arranged at four corners via a beam to form a rectangular box shape in plan view , and among the four pillars , At least one of the first pillars is formed in a hollow shape with a substantially square shape in plan view, and at least one of the remaining pillars protrudes toward the beam side of the two sides to be joined. Is a second pillar formed in a hollow shape with a substantially L shape in plan view having a corner inside, and the length of the side on the outer wall side facing the corner is the second pillar. It is characterized by being longer than the length of one column side .
[0009]
The invention according to claim 2 is a unit building in which a plurality of building units including the building unit according to claim 1 are combined in the vertical and horizontal directions .
[0010]
According to a third aspect of the present invention, in the unit building according to the second aspect, the first pillar is disposed inside, and the second pillar is disposed at a protruding corner portion.
[0011]
Use a second pillar projecting along two sides inside the building outer corner and especially inside the building where necessary, use a rectangular pillar in plan view at the building outer straight line and corner, and plan in the other interior You may mix types of equal pillars using a square first pillar.
Moreover, the pillar which protruded along two sides, the planar view rectangle, and a square pillar may be mixed in one building unit.
[0012]
[Action]
In the invention according to claim 1, the width of the second column is larger than the gap between the outer wall and the inner wall on one side of the building unit in both directions, and the secondary moment and the cross section are increased without increasing the thickness of the steel material. The coefficient increases and the building unit has excellent structural strength.
[0013]
In invention of Claim 2 and 3 , since the several building unit containing the building unit of Claim 1 is a unit building formed by combining two or more vertically and horizontally, the whole dimensional ratio of the building unit is changed. Therefore, the interior and exterior walls, partitions, etc. can be stored well and the indoor space can be used effectively.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 (a) is a perspective view of a building unit according to the present invention, and FIG. 1 (b) is an enlarged plan view of part A of FIG. 1 (b) of the building unit according to the present invention. FIG. 2 (a) is a perspective view of a conventional building unit, and FIG. 2 (b) is an enlarged plan view of part B of FIG. 2 (b). FIG. 3 shows an example of a three-story unit building in which the building unit of the present invention and a conventional building unit are combined. (A) is a perspective view of the unit building, and (B) is a plan view in which the building units are combined. .
[0015]
FIG. 1A shows a framework of the building unit 10, and the building unit includes a framework, an interior, and an exterior (not shown). The main structural portion is formed by connecting vertical pillars 11, 11 A, 11 A, and 11 B made of steel and horizontal ceiling beams 12, 12 and 13, 13 connecting both ends of adjacent pillars to form a plane. It is configured as a rectangular box. Reference numerals 14, 14 and 15 are floor beams. The columns 11, 11A, and 11B are hollow and prismatic steel materials, and the ceiling beams 12 and 13 and the floor beams 14 and 15 are channel-shaped steel materials.
[0016]
Thus, in this embodiment, the column 11 has a hollow cross-sectional square shape with a side length of a. 11A has a hollow cross-sectional rectangular shape with a short side length a and a long side length b. The column 11B is a column having a substantially L-shaped cross section formed of six plate portions as shown in FIG. The length of the plate portions 111 and 112 on the outer walls 211 and 212 side is b, and the length of the plate portions 113 and 116 whose one end is on the outer wall side and the other end is on the inner wall side is a.
The opposing sides 111, 113, and 115 are parallel to each other. The opposing sides 112, 114, 116 are also parallel. The angle formed by 111 and 112 is a right angle, and the angle formed by 114 and 115 is also a right angle.
[0017]
Further, the length b of the hollow column 11B having a substantially L-shaped cross section is, for example, the interior surface of the inner wall 222 surface having a length of 111 in the corner space 23 between the outer walls 211, 212 and the inner walls 221, 222. It is preferable that the length 112 protrudes from the side and the length 112 protrudes from the indoor surface side of the inner wall 221 surface.
[0018]
In the building unit 10, the pillars at the four corners have different cross-sectional shapes, but the width of the portion where the pillar and the beam intersect is the same width as a at any of the four corners, and the pillar is between the outer wall and the inner wall. The thickness of the wall layer formed by combining can be made constant. For this reason, the interior and exterior walls, partitions, etc. can be stored well and the indoor space can be used effectively.
[0019]
FIG. 3 (a) is a perspective view of a three-story unit building U, which is a combination of four units of the building unit 10 of the present invention and two units of a conventional building unit 10A on the first floor on the foundation 9. The floor and the third floor are also a similar combination, which is a unit building composed of a total of 18 units and a roof unit 4 combined thereon.
FIG. 3B is a plan view of the first floor of the unit building U. The building unit 10 is arranged so that pillars 11B having a substantially L-shaped cross section are installed at the four corners of the outer periphery of the unit building where rigidity and strength are required. A building unit 10 </ b> A in which a conventional column 11 having a hollow square section is used in other portions.
[0020]
That is, the unit building U according to the present embodiment uses the building unit 10 in a portion where rigidity and strength are required, and takes into consideration the accommodation of inner and outer wall thicknesses, partitions, etc. in other portions, and the conventional building unit 10A. Can be used without changing the dimensional ratio of the building unit and without increasing the thickness of the steel material, so that a column that fits within the wall can be used, and a unit building with improved bending rigidity and bending strength can be obtained.
[0021]
As for the increase in strength, for example, as shown in FIG. 2, the steel material used in the pillar 11 of the conventional building unit has a side length a = 100 mm and a plate thickness = 4.5 mm. As shown in FIG. 1, when the steel material of the column 11B of the embodiment of the present invention has an outer wall length b = 125 mm, a thickness direction a = 100 mm, and a plate thickness = 4.5 mm, The hollow section L-shaped column 11B has a weight increase ratio of 1.25 times that of the column 11 having a square section, but the sectional moment (I) is about 1.92 times the section coefficient (Z ) Is about 1.46 to 1.62 times.
When the length of one side is a = 100 mm and the thickness of the plate is only 9 mm without changing the external dimensions of the hollow cross-sectional square shape, the weight increase rate is 1.95 times and the cross-sectional secondary moment (I) is 1.64 times. As compared with the above, the column 11B having a hollow L-shaped cross section can ensure the strength economically (the cost of the steel material is proportional to the weight).
[0022]
Since the structural strength of the building unit configured in this way is improved with respect to the horizontal load of the part where the hollow section L-shaped column 11B is used, a three-storied house, a house with a rooftop balcony, a large roof house, etc. It is effective for use as a unit structure of buildings with large horizontal loads.
In addition, structural strength can be improved without changing the overall dimensional ratio of the building unit and without increasing the thickness of the steel material, and the thickness between the inner and outer wall layers is not changed. Can be secured.
[0023]
As a matter of course, the present invention is not limited to the above embodiments, and various design changes and the like made without departing from the gist of the present invention are also included in the scope of the present invention. For example, the ratio of the a dimension and the b dimension of the column is arbitrary.
[0024]
【The invention's effect】
As described above, in the invention described in claim 1, combines the four pillars that arranged in the four corners through the beam, a building unit constructed in plan view rectangular box-type, and the four At least one of the columns of the book is a first column that is substantially square in plan view, and is hollow, and at least one of the remaining columns protrudes toward the side of the two beams to be joined. In this way, the second pillar is formed in a hollow shape with a substantially L shape in plan view having an entrance corner inside the box shape, and the second pillar is a side of the side on the outer wall side facing the entrance corner. Since the length is longer than the length of the side of the first column, the increase in the weight of the steel material is small, the sectional moment and section modulus are increased, and the building unit is excellent in structural strength.
[0025]
In the inventions according to claims 2 and 3 , since the plurality of building units including the building unit according to claim 1 is a unit building formed by combining a plurality of top and bottom and left and right, it is disposed between the outer wall and the inner wall. Since the column size to be used is constant, for example, a as in the embodiment, the thickness of the wall layer can be made constant, and the interior and exterior walls, partitions, etc. can be stored well and the indoor space can be used effectively.
[Brief description of the drawings]
1A is a perspective view of a building unit according to the present invention, and FIG. 1B is an enlarged plan view of a portion A in FIG.
2A is a perspective view of a conventional building unit, and FIG. 2B is an enlarged plan view of a portion B in FIG. 2A.
FIG. 3 shows an example of a three-story unit building in which the building unit of the present invention and a conventional building unit are combined. (A) is a perspective view of the unit building, and (B) is a plan view in which the building units are combined. is there.
4A and 4B are a perspective view and a sectional view showing a reinforced steel pipe 2B in which a long steel pipe 2b is distributed inside a solid steel material 2A or a square steel pipe 2a as a conventional column.
FIG. 5 is a perspective view of a building unit using a conventional rectangular column with a cross-sectional shape.
[Explanation of symbols]
U unit building 9 foundation 10, 10A, 10B building unit 11, 11A, 11B pillar 12, 13, 14, 15 beam 21, 22 wall 23 space in wall

Claims (3)

It is a building unit that is composed of a rectangular box in plan view by connecting four pillars arranged at the four corners via beams .
Of the four pillars, at least one is a first pillar that is substantially square in plan view and formed hollow, and among the remaining pillars, at least one is directed toward the two side beams to be joined. A second pillar that is formed in a hollow shape in a substantially L shape in plan view having a corner inside the box shape so as to protrude;
This second column is a building unit characterized in that the length of the side of the outer wall facing the corner is longer than the length of the side of the first column . A unit building in which a plurality of building units including the building unit according to claim 1 are combined in the vertical and horizontal directions . The unit building according to claim 2, wherein the first pillar is disposed inside and the second pillar is disposed at a protruding corner portion .

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