JP5801578B2 - Frame structure - Google Patents

Description

  The present invention relates to a frame structure. Specifically, it relates to a frame structure of a high-rise building such as an office or an apartment.

Conventionally, in high-rise buildings such as offices and condominiums, when the span is changed according to the purpose of the room on the intermediate floor, or a columnar space is provided to make the bottom floor a large space such as a lobby or hall There is.
In this case, the lower floor pillar cannot be provided directly below the upper floor pillar, and the upper floor pillar is an intermediate pillar erected in the middle portion of the beam.

  In order to reasonably transmit the axial force applied to the intermediate column to the lower-level column, it has been proposed to enlarge the beam or to make the beam a truss structure or an arch structure. Alternatively, it has been proposed that a special structure such as a feeler deal structure or a suspended structure using a tension material is adopted as the structure of the building (see Patent Document 1).

JP-A-11-303209

However, the above structure complicates the support structure of the intermediate pillars, so it takes a lot of work to construct the joints between the walls and the beams in apartment buildings such as condominiums with many door walls and partition walls. Therefore, there is a problem that the construction cost increases.
Further, if the beam has a truss structure or an arch structure, it is necessary to increase the distance between the upper chord material and the lower chord material corresponding to the beam and the rise, and the use efficiency of the space on the floor is lowered.
In addition, when the feelendel structure or the suspended structure is adopted, the construction becomes complicated together with the structure of the building, so the construction period becomes longer and the cost further increases.

  An object of the present invention is to provide a frame structure that can transmit a large axial force applied to an intermediate column to a lower-level column with a simple structure while preventing the space utilization efficiency from decreasing.

The frame structure of the present invention is a frame structure of a structure including columns and beams, and a pair of columns (for example, columns 13 and 14 described later) on the n (n is a natural number) floor and the pair of columns. The (n + 1) -floor beam (for example, a seventh-floor floor beam 33 to be described later) erected and the (n + 1) -th floor intermediate column (for example, an intermediate column 15 to be described later) standing on the middle portion of the beam. ) And a wall (for example, a wall 51 to be described later) provided in contact with the lower surface of the beam and between the pair of columns, and the wall applies a vertical load applied to the intermediate column to the pair of columns. It is preferable to transmit to the pillar.

According to this invention, since the wall bears the axial force of the intermediate column together with the beam as a vertical shearing force, the axial force applied to the intermediate column is a pair of the nth floor via the beam and the wall of the (n + 1) floor. It is transmitted to the pillar, and further from the foundation to the ground via the pillar on the lower floor. In other words, the wall is integrated with the upper and lower beams to form a mega beam having a height of one layer, and the upper floor vertical load acting between the pair of columns is borne by the shear resistance of the wall. Therefore, not only long-term loads, but even if the axial force of the intermediate column increases during an earthquake, this increased axial force is transmitted to the pair of columns as the vertical shear force of the wall, and further to the lower floor columns. Can do.
Generally, a wall is designed as a structure that transmits a horizontal shear force during an earthquake, and the wall thickness, concrete strength, and wall reinforcement are determined for the designed shear force. Here, by providing a wall on the floor directly below the intermediate pillar, this wall acts as a mega beam having a height of one layer in cooperation with the beams on the upper and lower floors. Is transmitted to a pair of columns on both sides by the shear resistance.

Therefore, the support structure for transmitting the axial force of the intermediate pillar to the lower floor is not complicated as in the past, so even in the case of an apartment house such as an apartment, the boundary between the door wall and the intermediate pillar and the beam is usually This is a simple structure because it fits in the same manner as a reinforced concrete or steel frame.
Moreover, since it is not necessary to enlarge the beam itself as in the prior art, it is possible to prevent the space utilization efficiency from being lowered as compared with the case where the beam is a truss structure or an arch structure.
Moreover, since construction becomes easier compared with the case where a special structure such as a feeler deal structure or a suspended structure is adopted as the structure of the building, it is possible to suppress further increase in cost.

In the present invention, the intermediate posts, beams n floor (e.g., 6 Kaiyukahari 23 described later) preferably extends up.

  According to the present invention, by extending the intermediate column to the beam on the n-th floor, the intermediate column is fixed inside the wall, the force transmission area is expanded, and the rigidity of the wall itself is also increased. Force can be transmitted more smoothly to a pair of pillars.

The frame structure according to claim 1 is a frame structure of a structure including columns and beams, and extends from at least m (m is a natural number) floor to (m + 2) floor (for example, described later) Pillar 13), a second pillar extending from at least m floor to (m + 1) floor (for example, pillar 14 to be described later), and a beam of (m + 1) floor (for example, to be described later) installed between the pillars. 7th floor beam 33), (m + 1) th floor intermediate column (for example, intermediate column 15 described later), and (m + 1) of the intermediate column and the first column. ) A first wall (for example, a wall 52 described later) provided between the floor portion and the first wall, which transmits a vertical load applied to the intermediate column to the column. It is characterized by that.

According to this invention, the axial force applied to the intermediate pillar of the (m + 1) floor is transmitted as the vertical shearing force to the first pillar adjacent to the same floor through the first wall. Therefore, in addition to long-term loads, even if the axial force of the intermediate column increases during an earthquake, the axial force is transmitted as the vertical shearing force of the wall to the adjacent first column and further to the lower-level column. Can do.
Generally, the wall is designed as a structure that transmits the horizontal force during an earthquake, but the shear resistance of the wall can be reduced by joining the intermediate column and the adjacent first column with a wall of reinforced concrete or steel plate. Utilizing this, the axial force of the intermediate column is transmitted as a vertical shear force to the first column on the same floor.

  Therefore, while having the same effect as the above-mentioned claim 1, it is possible to reduce the axial force borne by the beam located immediately below the intermediate column.

In the present invention, a third column (for example, a column 12 to be described later) provided on the opposite side of the intermediate column across the first column, and a bridge between the third column and the intermediate column The (m + 2) floor beam (for example, an 8th floor beam 42 described later) to which the column heads of the columns are joined is provided between the third column and the first column. A second wall (for example, a wall 53 described later), and the second wall preferably transmits a vertical load applied to the intermediate column together with the first wall to the third column.

According to the present invention, the axial force applied to the intermediate column is transmitted as the vertical shearing force to the third column on the same floor via the second wall. Therefore, even if the axial force of the intermediate column increases during an earthquake as well as a long-term load, the axial force of the intermediate column is rationally applied to the first and third columns using the vertical shear resistance of the wall. Can be communicated to.
In addition, when the vertical load applied to the intermediate column is transmitted to the column, a bending moment is generated in this column, but the bending moment acting on this column can be reduced by joining the third column to the column with the second wall. Can be countered.

  According to the present invention, the support structure for transmitting the axial force of the intermediate column to the lower floor is not complicated as in the prior art, and the junction between the door wall and the intermediate column and the beam is a normal reinforced concrete structure or steel frame. It will be the same as the frame of construction. Moreover, since it is not necessary to enlarge the beam itself as in the prior art, it is possible to prevent the space utilization efficiency from being lowered as compared with the case where the beam is a truss structure or an arch structure. Moreover, since construction becomes easier compared with the case where a special structure such as a feeler deal structure or a suspended structure is adopted as the structure of the building, it is possible to suppress further increase in cost.

1 is a framework diagram of a building to which a frame structure according to a first embodiment of the present invention is applied. It is the framework figure of the building in which the frame structure concerning 2nd Embodiment of this invention was applied.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
FIG. 1 is a skeleton diagram of a building 1 as a structure to which a frame structure according to the first embodiment of the present invention is applied.
Specifically, FIG. 1 is a skeleton diagram of the building 1 from the 5th floor to the 8th floor. Hereinafter, the 4th floor and below are called lower floors, and the 9th floor and above are called upper floors.

The building 1 includes a plurality of pillars 11 to 15 and a plurality of beams 21 to 23, 31 to 33, 41 and 42.
Specifically, the building 1 includes pillars 11 and 12 that continuously extend from the lower floor to the upper floor, a pillar 13 that extends from the lower floor to the eighth floor level, a pillar 14 that extends from the lower floor to the seventh floor level, and It has an intermediate column 15 extending from the seventh floor level to the upper floor.

Between the column 11 and the column 12, a sixth-floor floor beam 21, a seventh-floor floor beam 31, and an eighth-floor floor beam 41 are installed.
Between the pillar 12 and the pillar 13, a sixth-floor floor beam 22 and a seventh-floor floor beam 32 are installed.
A sixth-floor floor beam 23 and a seventh-floor floor beam 33 are installed between the pillar 13 and the pillar 14. That is, the seventh floor beam 33 is joined to the columns 13 and 14.

  The intermediate column 15 is erected on the intermediate portion of the seventh-floor floor beam 33 laid between the column 13 and the column 14. Between the intermediate column 15 and the column 12, an eighth floor beam 42 is installed, and the column 13 extends from the lower floor to the eighth floor beam 42.

  Further, the building 1 is provided with a wall 51 that is in contact with the lower surface of the seventh-story floor beam 33 and extends between the columns 13 and 14. This wall 51 transmits the vertical load applied to the intermediate column 15 to the columns 13 and 14 on the sixth floor.

According to this embodiment, there are the following effects.
(1) Since the wall 51 bears the axial force of the intermediate column 15 together with the seventh-floor floor beam 33 as a vertical shearing force, the axial force applied to the intermediate column 15 is transmitted through the seventh-floor floor beam 33 and the wall 51 to the sixth floor. Are transmitted to a pair of pillars 13 and 14, and are further transmitted from the foundation to the ground via pillars on the lower floor. In other words, the wall 51 is integrated with the upper and lower beams 33 and 23 to form a mega beam having a thickness of one layer, and the upper floor vertical load acting between the pair of columns 13 and 14 is caused by the shear resistance of the wall. bear. Therefore, even if the axial force of the intermediate column 15 increases during an earthquake as well as a long-term load, this increased axial force is transmitted to the pair of columns 13 and 14 as a vertical shearing force of the walls, and the columns on the lower floor Can be communicated to.

Therefore, the support structure for transmitting the axial force of the intermediate pillar to the lower floor is not complicated as in the past, so even in the case of an apartment house such as an apartment, the boundary between the door wall and the intermediate pillar and the beam is usually This is a simple structure because it fits in the same manner as a reinforced concrete or steel frame.
Moreover, since it is not necessary to enlarge the beam itself as in the prior art, it is possible to prevent the space utilization efficiency from being lowered as compared with the case where the beam is a truss structure or an arch structure.
Moreover, since construction becomes easier compared with the case where a special structure such as a feeler deal structure or a suspended structure is adopted as the structure of the building, it is possible to suppress further increase in cost.

  (2) Since the pair of columns 13 and 14 on the 6th floor are joined to the 7th floor beam 33, the rigidity as a frame can be improved by the ramen structure in which the columns 13 and 14 and the beam 33 are integrated. 15 can be reliably transmitted by the pair of pillars 13 and 14 on the sixth floor.

[Second Embodiment]
FIG. 2 is a skeleton diagram of a building 1A as a structure to which the frame structure according to the first embodiment of the present invention is applied.
The present embodiment is different from the first embodiment in that the wall 51 is not provided and the walls 52 and 53 are provided, and other configurations are the same as those in the first embodiment.

That is, in this building 1A, a wall 52 as a first wall is provided between the intermediate pillar 15 on the seventh floor and the pillar 13 as the first pillar on the seventh floor. This wall 52 transmits the vertical load applied to the intermediate column 15 to the column 13 on the seventh floor.
In addition, a pillar 12 as a third pillar is located on the opposite side of the intermediate pillar 15 on the seventh floor across the pillar 13, and the pillar 12 on the seventh floor and the pillar 13 on the seventh floor are located in the building 1A. A wall 53 is provided as a second wall.

According to this embodiment, there are the following effects.
(3) The axial force applied to the intermediate pillar 15 on the seventh floor is transmitted as a vertical shearing force to the adjacent pillar 13 on the same seventh floor via the wall 52. Therefore, not only long-term loads, but also when the axial force of the intermediate column 15 increases during an earthquake, the axial force can be transmitted to the adjacent column 13 as the vertical shear force of the wall, and further to the lower-level column. it can. In addition, the axial force borne by the seventh-floor floor beam 33 located directly below the intermediate column 15 can be reduced.

(4) The axial force applied to the intermediate pillar 15 is rationally transmitted to the same seventh-floor pillar 12 through the wall 53. Therefore, not only a long-term load but also the axial force of the intermediate column 15 increases during an earthquake, the axial force of the intermediate column 15 is rationally transmitted to the columns 13 and 12 using the vertical shear resistance of the wall. can do.
Further, when the vertical load applied to the intermediate column 15 is transmitted to the column 13, a bending moment is generated in the column 13, but when the column 12 is joined to the column 13 by the wall 53, the bending moment acting on the column 13 is generated. Can be countered.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in the first embodiment, the intermediate column 15 is erected on the intermediate portion of the seventh-floor floor beam 33. Further, as shown by a broken line in FIG. You may extend to 23.

  In this way, in addition to the wall 51, the sixth-floor floor beam 23 to which the intermediate column 15 is joined also transmits the axial force of the intermediate column 15 to the pair of columns 13 and 14 on the sixth floor. Can be transmitted to the pair of pillars 13 and 14 more smoothly.

1, 1A ... Building (structure)
11, 12, 13, 14 ... Column 15 ... Intermediate column 21, 22, 23 ... 6th floor floor beam 31, 32, 33 ... 7th floor floor beam 41, 42 ... 8th floor floor beam 51, 52, 53 ... Wall

Claims (1)

A frame structure of a structure including columns and beams,
A first pillar extending from at least m (m is a natural number) floor to (m + 2) floor;
A second pillar extending from at least m floor to (m + 1) floor;
M-floor beam and (m + 1) -floor beam erected between the columns,
An intermediate pillar of the (m + 1) floor standing on the intermediate part of the beam of the (m + 1) floor;
A first wall provided between the intermediate pillar and a portion of the (m + 1) floor of the first pillar,
The first wall transmits a vertical load applied to the intermediate column to the first column on the same floor by a shear resistance of the first wall.

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