JP2016141978A - Building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge an opening by reducing a height of a beam on a balcony side, without adding a structural member.SOLUTION: A building includes a large building frame having an underground beam 21 and a beam 22 on a topmost floor connected to a column 1 on both sides of an outer frame. A beam 2 on each floor has a beam height smaller than a beam 20 on a side opposite a balcony. Columns on the balcony side include thin columns 10 and large columns 1 having a cross-section larger than the thin column 10, and the large columns 1 and the thin columns 10 may be installed alternately, or with two or three thin columns 10 between the large columns 1. Even though eccentricity of the building increases as the beam height is reduced on the balcony side, an excessive increase of the eccentricity is suppressed by installing the large column 1 with the larger cross-section and the beam 22 on the topmost floor and the underground beam 21.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a building having a large opening by reducing a beam on a balcony side of an apartment house, etc., which is excellent in daylighting and ventilation, and provides a sense of openness to residents.

Conventionally, a reinforced concrete structure or a steel reinforced concrete structure generally has a ramen structure composed of underground beams 21, columns 1A and beams 2A as shown in the structural front view of FIG. 6 and the plan view of FIG. In general, the cross section of the pillar and the beam is the same cross section without changing the size on the balcony side and the opposite side (hereinafter referred to as the corridor side), and the horizontal force acting on the building is shown in FIG. As shown by the arrows in FIG. 2, the balconies and the corridors are equally shared by 50%.
In order to obtain the required strength of the building, as shown in the sectional view of the opening in FIG. 8, the beam formation of the beam 2A is increased, the amount of protrusion of the beam 2A to the indoor side is increased, and the opening is relatively There is a problem that the occupant feels oppressed, lacks a sense of openness, and lighting and ventilation are not sufficient.

In order to solve this problem, a flat slab structure has been proposed. However, the flat slab is also used as a beam that also bears a horizontal force, and has to be considerably thick and expensive. In addition, although a reverse beam structure has been proposed, a full opening cannot be obtained.
In Patent Document 3 (Japanese Patent Application Laid-Open No. 2006-45662), in a reinforced concrete or steel-framed reinforced concrete apartment house, a slab is received by providing a reinforcing structure at the door boundary wall and the central part of each door, and the balcony side It has been proposed that a large opening can be set.

Japanese Patent Publication No. 5-84335 Japanese Patent Publication No. 4-28064 JP 2006-059462 A

  In the present invention, when a structural member that bears a load as in Patent Document 3 is additionally used, the space is divided by the structural member and the degree of freedom in floor plan is reduced. It is possible to obtain a building with a large opening on the balcony side without using a roof and without changing the floor height.

  In buildings with a ramen structure, the difference in the seismic force borne by the structural members constituting the ramen structure on the balcony side and the opposite side (corridor side), that is, the balcony side and the opposite side (The corridor side) is not composed of structural members with the same cross section, but in the range where the eccentricity of the building does not become excessive, the beam on the balcony side is made smaller than the beam on the opposite side (hall side), It is a building in which columns with a cross section larger than the standard cross section are alternately arranged between columns smaller than the standard cross section, and an opening can be provided on the balcony side without installing additional reinforcing members. is there.

By allocating the horizontal load acting on the building to the balcony and the structural members on the opposite side at an appropriate sharing rate, the beam on the balcony can be reduced without reducing the earthquake resistance of the building. Therefore, the opening on the balcony side can be made larger than before, and the building can have a large open feeling.
As a building, it is possible to obtain a building that guarantees seismic performance, excels in daylighting and ventilation, and gives residents a sense of openness.

The column beam structure figure of the building of the present invention. The top view of the building of this invention. Sectional drawing by the side of the balcony of this invention. The top view of Example 2 of the building of this invention. The front view of Example 3 of the building of this invention. FIG. 3 is a structural diagram of a conventional column beam of a building. The top view of the conventional building. Sectional drawing by the side of the conventional balcony.

Example 1
FIG. 1 is a structural diagram of a column beam on a balcony side of a building having a ramen structure according to the present invention, and FIG. 2 is a plan view thereof. It is a huge frame composed of underground beams 21 connected to pillars 1 on both sides of the outer shell and beams 22 on the uppermost floor, and beams 2 on each floor are smaller beams than beams 20 on the opposite side of the balcony. .
The column on the balcony side is composed of a narrow column 10 and a thick column 1 having a cross section larger than that of the narrow column 10, and the thick column 1 and the narrow column 10 are alternately arranged in the illustrated example. It is also possible to arrange two or three thin pillars 10 between one.
Decreasing the beam on the balcony side increases the eccentricity of the building, but increasing the eccentricity by arranging the thick pillar 1, the uppermost beam 22 and the underground beam 21 with a larger cross section. Suppressed. Moreover, it is preferable that the beam 22 on the uppermost floor on the balcony side has a larger cross section than the beam 2 on the balcony side of the other floor.

  In the present invention, the horizontal force is not shared equally between the balcony side and the hallway side as in a conventional building, but the balcony side is about 25% and the hallway side is about 75%, that is, 1: 3. As for the sharing ratio, the sharing ratio on the corridor side is about 80%, and the sharing ratio of the horizontal force is determined in consideration of the eccentricity ratio of the building.

  A sectional view of the opening on the balcony side of the building of the present invention is shown in FIG. The width of the beam 2 is preferably within the column width of the thick column 1 or the thin column 10. Since the beam formation of the beam 2 is smaller than that of the conventional building of FIG. 8, it is possible to increase the height of the opening on the balcony side.

Example 2
As shown in FIG. 4, the basic arrangement of the column beams is the same as in the first embodiment, and an auxiliary beam 2 s is provided inside the beam 2 in order to further reduce the beam formation of the beam 2. The share of horizontal force on the balcony side and the corridor side does not change, but it is possible to reduce the share of the beam 2 by the auxiliary beam 2s with the horizontal force borne by the balcony side, and from the center of the building to the balcony side Since the auxiliary beam 2s is disposed at the center, it is effective for reducing the eccentricity.

Example 3
FIG. 5 is a cross-sectional view showing the entire building to which the present invention is applied. On the balcony side, the thin pillars 10 and the thick pillars 1 are alternately provided on the underground underground beam 21. Shows the part.
On the corridor side, the underground beam 21 is provided with a thick pillar 10a having a larger cross section than that of the standard cross section and smaller than that of the thick pillar 1, and a beam 20 having a larger cross section is disposed on the lower floor.
Since the horizontal force acting on the upper floor is smaller than that of the lower floor, the beams 25 and 26 have a smaller cross section than the beam 20 on the lower floor.
On the balcony side, a small beam 2 is provided, and on the top floor, a beam is not projected as a reverse beam 27 to the room side.

1 Thick column 10 Narrow column 2 Beam 2s Auxiliary beam

  The present invention makes a difference in the ratio of the seismic force (horizontal force) borne by the structural members constituting the ramen structure on the balcony side and the opposite side (corridor side) in a ramen structure building such as an apartment house. It is related to the building which reduced the beam formation on the balcony side and made the opening large to excel in lighting and ventilation so that residents can feel open.

By allocating the horizontal load acting on the building to the balcony side and the structural members on the opposite side at an appropriate share rate, the beam on the balcony side can be reduced without reducing the earthquake resistance of the building. Therefore, the opening on the balcony side can be made larger than before, and a building with a large open feeling can be obtained.
As a building, earthquake-proof performance is guaranteed, it is excellent in lighting and ventilation, and a building that gives residents a sense of openness is obtained.

Claims (4)

  It is a building with a ramen structure, and the ratio of the horizontal force borne by the structural members that make up the ramen structure is different between the balcony side and the opposite side. A building that is smaller than a girder and in which narrow columns with a smaller cross section are arranged between thick columns with a large cross section. 2. The building according to claim 1, wherein the cross section of the beam on the balcony on the balcony side is larger than the cross section of the beam on the balcony side of another floor. The building according to claim 2, wherein the beam on the uppermost floor on the balcony side is a reverse beam. The building according to any one of claims 1 to 3, wherein an auxiliary beam is provided inside the beam on the balcony side.