JP6896581B2 - Connection structure between shear wall and pillar - Google Patents

Description

The present invention relates to a connection structure between a shear wall and a pillar, which is suitable for an apartment house or other building.

In buildings such as apartment houses, various measures have been taken to prevent pillars and beams from protruding into the dwelling units.
For example, in Patent Document 1, in order to prevent columns and beams from appearing in the living room on the balcony (veranda) side, a structure consisting of columns and beams (reverse beams) extending in the girder direction is set at the tip of the balcony. A plate-shaped apartment house having a so-called out-frame structure to be located is described. With this configuration, there are no pillars or beams in the living room on the balcony side, and the window opening can be made large. Then, by adopting a multi-story shear wall structure as the door boundary wall in the beam-to-beam direction, it is possible to avoid the beam-shaped protrusion in the beam-to-beam direction in the dwelling unit.
However, in the above-mentioned apartment house, since the ramen structure consisting of pillars and beams extending in the girder direction is provided at the boundary between the dwelling unit and the common corridor, the dwelling unit on the common corridor side has a pillar type and a beam type. It is a mode to come out.
Therefore, while adopting a multi-story shear wall structure, let's adopt an out-frame structure on the common corridor side as well as on the balcony side so that pillars and beams do not appear in the dwelling units on the common corridor side. Then, the earthquake-resistant wall connected to the pillar blocks the common corridor, and the passage cannot be secured.
However, if an opening is to be provided in the earthquake-resistant wall on the common corridor side so that people can pass through, a pillar connecting to the earthquake-resistant wall will be provided at the boundary between the dwelling unit and the common corridor, and the common corridor side. A pillar shape appears in the living room (see Fig. 8). In addition, a beam connecting this column and the column of the out frame is also required. It is structurally unreasonable to have two pillars lined up in close proximity.

Japanese Patent No. 5646838

The present invention prevents pillars and beams from protruding into the living room (inside the dwelling unit), and is used for the passage of people between the pillars and the earthquake-resistant walls arranged in multiple layers. It is an object of the present invention to provide a connection structure between a shear wall and a column having an opening to be provided.

(1) In the connection structure between the earthquake-resistant wall arranged in multiple layers and the pillars connected to the earthquake-resistant wall.
From the wall thickness of the earthquake-resistant wall that connects the earthquake-resistant wall and the pillar with a space that can be used for human passage between the horizontal end of the earthquake-resistant wall and the pillar. Also equipped with a flat beam with a large beam width,
The flat beam is provided with a fixing portion with the earthquake-resistant wall that bites into the earthquake-resistant wall at a predetermined distance from the horizontal end portion of the earthquake-resistant wall toward the center side of the earthquake-resistant wall.
It is a connection structure between the earthquake-resistant wall and the pillar.
(2) The feature is that the outer wall line of the building is aligned with the end portion of the fixing portion of the flat beam on the central side of the earthquake-resistant wall.

(1) The wall thickness of the earthquake-resistant wall that connects the earthquake-resistant wall and the pillar with a space that can be used for human passage between the horizontal end of the earthquake-resistant wall and the pillar. By providing a flat beam with a larger beam width, a multi-story shear wall structure with an opening between the column and the shear wall that can be used for human passage is obtained, and the shear wall is horizontal. Since there is no pillar connected to the directional end portion (the entire side portion on the side facing the pillar), it is not necessary to provide two pillars in close proximity to each other, and the pillar-shaped protrusion can be eliminated. In addition, it is possible to prevent the pillar type and the beam type from protruding into the living room.
The flat beam is provided with a fixing portion with the seismic wall, which bites into the center side of the seismic wall from the horizontal end of the seismic wall for a predetermined distance, and this fixing portion is a fixing portion of the seismic wall (wall plate). At the top of the edge, it acts like a capital in a flat slab. That is, in the fixing portion, the tensile force of the main bar of the flat beam is transmitted to the concrete by the adhesive force, and is transmitted to the shear wall by the torsional resistance of the fixing portion.
(2) By aligning the outer wall line of the building with the end of the fixing portion on the center side of the earthquake-resistant wall, a neat and good-looking interior space without beam-shaped protrusions can be obtained, and the floor plan can be adjusted. Adverse effects can be avoided.
There is no beam shape on the upper part of the outer wall orthogonal to the multi-story shear wall, and there is no beam penetration of the duct, improving workability.

It is a top view of the building 1 of the Example to which the connection structure which concerns on this invention is applied. It is a side view of the connection part between a shear wall and a pillar. It is an arrow view of AA of FIG. 2 (reinforcing bar structure is shown). It is a BB arrow view of FIG. 2 (reinforcing bar structure is shown). It is a CC arrow view of FIG. 2 (reinforcing bar structure is shown). It is explanatory drawing of the mechanism in the joint part of a flat beam and a shear wall. (A) is an elevation view and (b) is a cross-sectional view of another embodiment to which the connection structure according to the present invention is applied. It is an elevation view (cross-sectional view) which shows the building structure related to the background technology.

In the connection structure of the earthquake-resistant wall arranged in multiple layers and the pillar connected to the earthquake-resistant wall, it is used for the passage of people between the horizontal end of the earthquake-resistant wall and the pillar. A flat beam having a beam width larger than the wall thickness of the earthquake-resistant wall (a flat T-shaped beam that bends and yields) is provided, which connects the earthquake-resistant wall and the column at a possible interval. The structure is provided with a fixing portion with the earthquake-resistant wall, which bites into the earthquake-resistant wall for a predetermined distance from the horizontal end portion of the earthquake-resistant wall toward the center side of the earthquake-resistant wall.

FIG. 1 is a plan view of a building 1 of an embodiment in which the connection structure according to the present invention is applied to the corridor side of a building related to a plate-shaped house.
The building 1 has a plurality of dwelling units 2 continuously arranged in the girder direction, a common corridor 3 arranged on one side of the plurality of dwelling units 2, and the other side along the plurality of dwelling units. It is configured as a middle-high-rise apartment house with an arranged balcony 4.

The building 1 is provided with a frame surface of a rigid frame structure including columns 5 and beams 6 extending in the girder direction on the outside of the common corridor 3 (out-frame reverse beam). Further, on the side of the balcony 4, a frame surface of a rigid frame structure including columns 7 and beams 8 extending in the girder direction is provided (out-frame reverse beam).
The earthquake-resistant wall 10 extending in the direction between the beams is formed as a door boundary wall for partitioning a plurality of dwelling units 2, and is connected to pillars 5 located on the side of the common corridor 3 and pillars 7 and 7a located on the side of the balcony 4. There is.
The seismic wall 10 of each layer of the seismic wall 10 arranged in multiple layers over a plurality of layers is composed of a single plate-shaped wall body (wall plate), and is usually made of reinforced concrete. It is preferable that the beam has a main bar and a horizontal bar, and has a built-in beam having the same thickness as the wall thickness.

Hereinafter, the connection structure between the earthquake-resistant wall 10 and the pillar 5 located outside the common corridor 3 connected to the earthquake-resistant wall 10 will be described with reference to FIGS. 1 to 6.
The earthquake-resistant wall 10 and the pillar 5 are connected with a space between the horizontal end of the earthquake-resistant wall 10 (the end on the side of the common corridor 3) and the pillar 5 so that it can be used for human passage. A flat beam 20 is provided. This portion (opening) can be used as the common corridor 3 by setting the above-mentioned "interval that can be used for the passage of people".

As shown in FIGS. 1, 3, 4, and 5, the flat beam 20 has a beam width larger than the wall thickness of the shear wall 10, and one side is connected to the column 5 and extends horizontally in a strip shape. On the other side, the flat beam 20 is connected to the earthquake-resistant wall 10, but the flat beam 20 is predetermined toward the center side of the earthquake-resistant wall 10 rather than the horizontal end of the earthquake-resistant wall 10 (the end on the side facing the pillar 5). It is provided with a fixing portion (flat beam-shear wall joint) 21 with a distance (Lx), a bite, and a shear wall 10.
The flat beam 20 is joined to the earthquake-resistant wall 10 in the extending direction of the beam at the fixing portion 21, and is joined in such a manner that the earthquake-resistant wall 10 which is a face material is gripped from both sides.
As shown in FIGS. 2 to 5, the flat beam 20 includes a flat beam main bar 22, a flat beam shear reinforcing bar 23, and a torsion reinforcing bar 24 in the fixing portion 21. As shown in FIG. 5, the twist reinforcing bar 24 exemplifies a U-shaped one in a plan view.
The predetermined distance (Lx) is, for example, about 1.0 to 2.0 times (about 200 to 1200 mm) of the beam length of the flat beam 20, and the beam width of the flat beam 20 is 0.8 times to the column width. It is 1.2 times (about 800 to 1200 mm). The beam thickness of the flat beam 20 is about 1.0 to 3.0 times (about 200 to 600 mm) the wall thickness, and is about 1/2 or less of the opening width.
If the toughness of the flat beam 20 becomes large and the ratio of the beam toughness to the opening width (beam toughness / opening width) becomes too large, bending yield will occur at both ends of the flat beam 20 unless special concrete such as fiber reinforced concrete is used. It becomes difficult to design a tough type.

As described above, the fixing portion 21 acts like a capital in a flat slab at the upper end of the end portion of the earthquake-resistant wall (wall plate) 10. That is, in the fixing portion 21, the tensile force of the flat beam main bar 22 is transmitted to the concrete by the adhesive force, and is transmitted to the seismic wall 10 by the torsional resistance of the fixing portion 21.
Further, the flat beam 20 is a “flat T-shaped beam” together with a slab bar (reinforcing bar that acts as a bending reinforcing bar in the same manner as the flat beam main bar) 31 arranged within the effective width of the RC standard of the slab 30 in the width direction thereof. Is formed as. In FIG. 1, the range (effective width) in which the slab muscle 31 within the effective width of the RC standard is expected is schematically shown by hatching on both the left and right sides of the flat beam 20.
Reference numeral 11 indicates a vertical line of the earthquake-resistant wall, and reference numeral 12 indicates a horizontal line of the earthquake-resistant wall.
In FIGS. 3 and 4, the main reinforcement in the Y direction of the slab and the arrangement of the beam 6 orthogonal to the flat beam 20 are not shown.

The mechanism for transmitting the bending moment of the flat beam 20 to the wall plate will be described with reference to FIG.
A twisting moment acts on the fixing portion 21 due to the bending compressive force C and the bending tensile force T (positive / negative alternating force at the time of an earthquake) due to the moment M of the flat beam. The resistance to this torsional moment is the torsional resistance T _rC of the concrete cross section (Lx × Lz) and the total shear resistance of the shear reinforcing _{bar and the torsion resistance bar Σ i} T _rRB . (Generally, since there are protrusions on both sides of the wall plate, there is twice the resistance in the above figure. Two-sided friction)
That is, the joint is designed so that the following equation holds.

As shown in FIG. 1, by aligning the outer wall line (outer wall surface of the living room space) 2a of the building with the end portion of the fixing portion 21 of the flat beam on the center side of the earthquake-resistant wall 10, the beam shape does not protrude and is neat. It is possible to obtain a nice-looking interior space and avoid adverse effects on the floor plan.

FIG. 7 is an elevational view of a building 1 showing an example in which a connection structure between a shear wall and a pillar according to the present invention is applied to both sides (left and right sides in the figure) of a building related to a plate-shaped house in the direction between beams.
The structure in the girder direction is configured as a ramen structure (out frame) of columns and beams (reverse beams).
The column 5 and the earthquake-resistant wall (wall plate) 10 are connected by a T-shaped flat beam 20 with an opening (the part indicated by x in the figure), and a built-in beam main bar is connected to the upper end of the earthquake-resistant wall 10. There is a built-in beam that passes through and has the same thickness as the wall.
The vertical force acting between the columns and the earthquake-resistant wall is borne by the flat beam 20, and the load of the shearing force is shared by the wall plate 10 and the columns 5 and 5 on both sides.
The use of the flat beam 20 is convenient for designing with a performance rich in deformation performance that bends and yields at the beam end, and also has an advantage in architectural planning that a large opening area can be obtained.
Further, the outer wall line of the building 1 is set at the position indicated by the alternate long and short dash line in the figure, that is, the outer wall line of the building 1 is aligned with the end portion of the fixing portion 21 of the flat beam 20 on the center side of the earthquake-resistant wall 10. As a result, a living room space without beam-shaped protrusions can be obtained, damage during an earthquake can be concentrated on a flat beam, and recovery after a disaster can be facilitated.

The connection structure between the earthquake-resistant wall and the pillar according to the present invention can be applied to a condominium such as a middle-high-rise condominium, an external corridor or a balcony of a hospital or other building.
Although the embodiment for carrying out the invention has been described above, the present invention is not limited to the above, and can be appropriately added or modified within the scope of the gist of the present invention.

1 Building 5 Pillars 10 Shear wall 20 Flat beam 21 Fixing part 22 Flat beam main reinforcement 23 Flat beam shear reinforcement 24 Twist reinforcement

Claims (2)

In the connection structure between the earthquake-resistant wall arranged in multiple layers and the pillars connected to the earthquake-resistant wall,
From the wall thickness of the earthquake-resistant wall that connects the earthquake-resistant wall and the pillar with a space that can be used for human passage between the horizontal end of the earthquake-resistant wall and the pillar. Also equipped with a flat beam with a large beam width,
The flat beam is provided with a fixing portion with the earthquake-resistant wall that bites into the earthquake-resistant wall at a predetermined distance from the horizontal end portion of the earthquake-resistant wall toward the center side of the earthquake-resistant wall.
Connection structure between earthquake-resistant walls and columns. The connection structure between a seismic wall and a column according to claim 1, wherein the outer wall line of the building is aligned with the end portion of the fixing portion of the flat beam on the central side of the seismic wall.

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