JP7477089B2 - Supporting members for building columns - Google Patents

Description

This invention relates to auxiliary components for building columns that, when assembled in layers, complement the function of the columns when they lose their ability to support the vertical load that they bear during an earthquake.

Conventionally, earthquake-resistant auxiliary structures for building columns, which are installed in anticipation of the possibility that the columns may lose their function, have been constructed by stacking and assembling auxiliary members between the building's foundation beams and their upper beams.
This auxiliary structure is designed so that when a building's pillars are damaged, the vertical load that had been borne by the pillars is taken over by the stacked auxiliary components. This ensures that the building's occupants have enough space and time to evacuate, even if the building's pillars are damaged during a major earthquake.

JP 2013-122159 A

Conventionally, auxiliary members constituting the auxiliary structure of a building column are made of hollow box-shaped bodies.
As a result, when the auxiliary members of the installed building columns were subjected to a load during a major earthquake, the force was only borne by the two side sections, and they were unable to bear large horizontal loads.
In addition, if the building is displaced horizontally due to lateral shaking during an earthquake, the auxiliary members will also deform horizontally, which could result in them losing their ability to bear vertical loads.

In order to achieve the above-mentioned object, the auxiliary member for a building column of the present invention comprises a first side portion extending vertically, an upper surface portion extending horizontally continuous with the upper edge of the first side portion, a lower surface portion extending horizontally continuous with the lower edge of the first side portion, a second side portion connecting the edges of the upper surface portion and the lower surface portion and extending parallel to the first side portion, and a rib that is perpendicular to the first side portion, the upper surface portion, the lower surface portion, and the second side portion and is fixed to the inner surfaces of at least any two of the first side portion, the upper surface portion, the lower surface portion, and the second side portion, wherein the upper surface portion and the lower surface portion have bolt insertion holes for connecting the surfaces that come into contact when stacked, and the rib has a triangular shape when viewed from the front and is fixed to the inner surfaces of any two orthogonal surfaces of the first side portion, the upper surface portion, the lower surface portion, and the second side portion.

The auxiliary member for a building column of the present invention, which has been made to achieve the above-mentioned object, comprises a first side portion extending in a vertical direction, an upper surface portion extending horizontally continuous with the upper edge of the first side portion, a lower surface portion extending horizontally continuous with the lower edge of the first side portion, a second side portion connecting the edges of the upper surface portion and the lower surface portion and extending parallel to the first side portion, and a rib that is perpendicular to the first side portion, the upper surface portion, the lower surface portion, and the second side portion and is fixed to the inner surfaces of at least any two of the first side portion, the upper surface portion, the lower surface portion, and the second side portion.
The rib may be fixed around all four sides to inner surfaces of the first side portion, the upper surface portion, the lower surface portion and the second side portion, and an opening may be provided by cutting out a part of the rib.
The rib may have a rectangular or circular opening in its center.
The rib may be fixed to the inner surfaces of any two orthogonal surfaces among the first side surface portion, the upper surface portion, the lower surface portion, and the second side surface portion, and may have a triangular shape when viewed from the front.

The present invention provides at least one of the following advantages by solving the above-mentioned problems.
(1) The ribs on the inner surface of the auxiliary member bear the forces acting on each surface of the auxiliary member, resulting in a highly durable earthquake-resistant auxiliary structure.
(2) By providing an opening in the rib, a connecting material on the other side of the rib can be attached from one opening surface.
(3) By making the openings in the ribs a specific shape, the structure constructed by stacking auxiliary members creates a geometric pattern, giving a new aesthetic feel to the facade and pilotis.

FIG. 1 is a perspective view of a support member for a building column according to the present invention; An explanatory diagram of an earthquake-resistant auxiliary structure using auxiliary members for building columns of the present invention. FIG. 13 is a perspective view of an auxiliary member for a building according to another embodiment of the present invention; Illustration of rib shape

The building support components of the present invention will be described in detail below with reference to the drawings.

[Example 1]
(1) Auxiliary member for building column The auxiliary member 1 for a building column of the present invention is a hollow cube having an opening on one side and is made of steel plate, and has a first side portion 11 extending vertically, an upper surface portion 12 extending horizontally and continuing from the upper edge of the first side portion 11, a lower surface portion 13 extending parallel to the upper surface portion 12 and continuing from the lower edge of the first side portion 11, and a second side portion 14 connecting the edges of the upper surface portion 12 and the lower surface portion 13 and extending parallel to the first side portion 11 (Figure 1).

(2) Rib The auxiliary member 1 has ribs 15 on the inner surfaces of the first and second side surface portions 11, 14 and the upper and lower surface portions 12, 13, which are fixed around all four peripheries by welding.
The rib 15 is made of a steel plate and has a rectangular opening 151 with vertices at the centers of the four sides.

(3) Earthquake-resistant auxiliary structure The earthquake-resistant auxiliary structure of a building using the auxiliary member 1 of the present invention is installed between the beams of a building. In this embodiment, it is constructed by arranging multiple auxiliary members 1 in parallel and stacking them on a base 2 made of concrete (Figure 2).
The building to which the earthquake-resistant auxiliary structure using the auxiliary member 1 of the present invention is applied is, for example, an existing building such as a steel-framed warehouse, office building, etc. The building of this embodiment has beams 4 and foundations 5 above and below columns 3, and serves as an earthquake-resistant auxiliary structure to compensate for the insufficient strength of the columns 3 and beams 4.
A base 2 is formed on the upper part of the foundation portion 5 .
The auxiliary members 1 are then stacked in parallel on the base 2, and the bolts of the connecting members 16 made of bolts and nuts are inserted into the bolt insertion holes 11A, 12A, 13A, 14A of the contacting surfaces, and the nuts are screwed in to connect them. The upper surface 12 of the uppermost auxiliary member 1 is connected to the beam 4.
Since the auxiliary member 1 of the present invention has an opening 151 in the rib 15, the connecting material 16 on the other side of the rib 15 can be attached from one opening surface of the auxiliary member 1. Therefore, the auxiliary member 1 can be applied to buildings in which one opening surface of the auxiliary member 1 is blocked.

(4) Function of earthquake-resistant auxiliary structure When a force acts on a building due to an earthquake or the like, bending and shear deformation occurs in the columns 3 and beams 4, and the auxiliary members 1 of the earthquake-resistant auxiliary structure fixed to the beams 4 and foundation 5 elastically deform, supporting the vertical load of the building and suppressing deformation occurring in the building.
In addition, when the column 3 collapses, the earthquake-resistant auxiliary structure supports the axial force instead of the column 3. When the axial force increases, the stacked auxiliary members 1 deform layer by layer to absorb the impact. The stacked auxiliary members 1 deform in sequence for each layer until the story collapses, suppressing sudden story collapse.
The ribs 15 provided on the inner surface of the auxiliary member 1 bear the forces acting on each surface of the auxiliary member 1, thereby suppressing deformation of the auxiliary member 1 and resulting in a high-strength earthquake-resistant auxiliary structure.

[Other Examples]
(1) Shape of the opening In the above embodiment, the opening 151 of the rib 15 is rectangular, but it may be circular (FIG. 3). Also, cutouts 152 may be provided at the four corners of the rib 15. By providing the cutouts 152, when the rib 15 is fixed to the inner periphery of the reinforcing member 1, even if there is a dimensional error at the corners of the inner periphery of the reinforcing member 1, the rib 15 can be accommodated within the inner periphery of the reinforcing member 1 without processing the rib 15. Also, providing the cutouts 152 shortens the weld length, facilitating welding of the ends, and reduces construction costs.

(2) Shape of the rib The rib 15 may be triangular ( FIG. 4( a) ) fixed to the inner surface of the upper surface portion 12 (or the lower surface portion 13) and the second side surface portion 14 (or the first side surface portion 11), or may be shaped, for example, with a portion cut out in an arc shape ( FIG. 4( b ) ).

By giving the openings 151 of the ribs 15 a specific shape in this way, the structure constructed by stacking the auxiliary members 1 creates a geometric pattern (Figure 2), giving the building façade and pilotis a new aesthetic feel through the earthquake-resistant auxiliary structure.

1 Auxiliary member 11 First side surface portion 12 Upper surface portion 13 Lower surface portion 14 Second side surface portion 15 Rib 151 Opening 152 Cutout 2 Base 3 Column 4 Beam 5 Foundation portion

Claims (1)

A first side portion extending in a vertical direction;
An upper surface portion extending horizontally continuous with an upper end edge of the first side surface portion;
A lower surface portion extending horizontally continuous with a lower end edge of the first side surface portion;
a second side surface portion connecting edges of the upper surface portion and the lower surface portion and extending parallel to the first side surface portion;
a rib that is perpendicular to the first side surface portion, the upper surface portion, the lower surface portion, and the second side surface portion and is fixed to the inner surface of at least two of the first side surface portion, the upper surface portion, the lower surface portion, and the second side surface portion;
The upper surface portion and the lower surface portion have bolt insertion holes for connecting the surfaces that contact each other when stacked,
The rib is fixed to the inner surfaces of any two orthogonal surfaces among the first side surface portion, the upper surface portion, the lower surface portion, and the second side surface portion, and has a triangular shape when viewed from the front.
Auxiliary member for building columns.

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