JP2024030307A - Earthquake reinforcement structure for suspended ceilings and construction method for earthquake reinforcement structure for suspended ceilings - Google Patents

Abstract

The present invention provides an earthquake-resistant reinforcement structure for a suspended ceiling that can be constructed without dismantling an existing suspended ceiling, and a method for constructing the earthquake-resistant reinforcement structure for a suspended ceiling. [Solution] A suspended ceiling seismic reinforcement structure 200 includes a plurality of existing ceiling beams 12 extending in a first direction A suspended ceiling reinforcement structure comprising a ceiling base material supported by a ceiling structure having a plurality of horizontal members 13 extending in two directions Y, and a horizontal reinforcing body 3 that connects the plurality of horizontal members 13 to each other. and a vertical reinforcing body 4 that connects the horizontal member 13 and the ceiling base material 16. [Selection diagram] Figure 2

Description

The present invention relates to an earthquake-resistant reinforcement structure for a suspended ceiling and a method for constructing an earthquake-resistant reinforcement structure for a suspended ceiling.

BACKGROUND ART Suspended ceilings like so-called grape trellises have been known for some time (see Patent Document 1 below). Suspended ceilings are susceptible to lateral sway due to horizontal forces acting during earthquakes, and it may be desirable to perform seismic reinforcement in anticipation of an earthquake that exceeds the design standards at the time of construction.

Japanese Patent Application Publication No. 2017-101479

If the existing ceiling is demolished during seismic reinforcement work, it will be a large-scale work and there is a risk that the construction period will be extended.

The present invention has been made in view of the above circumstances, and provides an earthquake-resistant reinforcement structure for a suspended ceiling that can be constructed without dismantling an existing suspended ceiling, and a construction method for the earthquake-resistant reinforcement structure for a suspended ceiling.

In order to achieve the above object, the present invention employs the following means.
That is, the seismic reinforcement structure for a suspended ceiling according to the present invention includes a plurality of existing ceiling beams extending in a first direction, and a second ceiling beam extending horizontally in a direction orthogonal to the first direction and along a horizontal plane. A suspended ceiling reinforcement structure comprising a ceiling base material supported by a ceiling structure having a plurality of horizontal members extending in the direction, a horizontal reinforcing body connecting the plurality of horizontal members to each other, and a horizontal reinforcing member connecting the plurality of horizontal members, A vertical reinforcing body that connects the frame material and the ceiling base material is provided.

In a ceiling seismic reinforcement structure constructed in this way, existing ceiling beams and horizontal members are used without dismantling, horizontal reinforcements connect multiple horizontal members, and vertical reinforcements are used to connect horizontal members. Connect the material and the ceiling base material. Therefore, earthquake reinforcement can be constructed without dismantling the existing suspended ceiling.

Moreover, in the seismic reinforcement structure for a suspended ceiling according to the present invention, the horizontal reinforcing body may have a reinforcing beam that is a steel frame member that connects the adjacent horizontal members and extends in the first direction. good.

In the ceiling seismic reinforcement structure constructed in this way, adjacent horizontal members are connected using steel reinforcing beams to provide seismic reinforcement. Therefore, since the length of the reinforcing beam may be equal to the distance between adjacent horizontal members, the reinforcing beam can be carried into the ceiling space by making a small opening in the ceiling base material.

Moreover, in the seismic reinforcement structure for a suspended ceiling according to the present invention, the horizontal reinforcing body connects the reinforcing beams adjacent to each other in the second direction, and extends in a direction intersecting the first direction and the second direction and in a horizontal plane. It may include a first horizontal brace that extends in a direction along the direction and is made of a steel frame.

In the ceiling seismic reinforcement structure configured in this way, the first horizontal brace made of steel is used to connect reinforcing beams adjacent in the second direction to perform earthquake reinforcement. Therefore, since the length of the first horizontal brace only needs to be slightly longer than the interval between adjacent reinforcing beams in the second direction, the first horizontal brace can be carried into the ceiling space by opening a small opening in the ceiling base material. Can be done.

Moreover, in the seismic reinforcement structure for a suspended ceiling according to the present invention, the horizontal reinforcing body connects the horizontal member and the reinforcing beam, and extends in a direction intersecting the first direction and the second direction and along a horizontal plane. It may have a second horizontal brace extending in the direction and being a steel member.

In the seismic reinforcement structure of the ceiling configured in this way, the second horizontal brace made of steel is used to connect the horizontal members and the reinforcing beams to perform earthquake reinforcement. Therefore, since the length of the second horizontal brace only needs to be slightly longer than the distance between the horizontal member and the reinforcing beam, it is possible to open a small opening in the ceiling base material and carry the second horizontal brace into the ceiling space. can.

Moreover, in the seismic reinforcement structure for a suspended ceiling according to the present invention, the vertical reinforcing body has a hanging member that is a steel frame member that connects the horizontal member and the ceiling base member and extends in the vertical direction. It's okay.

In the ceiling seismic reinforcement structure configured in this manner, the horizontal members and the ceiling base material are connected to each other using steel frame hanging members to provide seismic reinforcement. Therefore, the length of the hanging material may be equal to the distance between the horizontal frame material and the ceiling base material, so that the hanging material can be carried into the ceiling space by making a small opening in the ceiling base material.

Moreover, in the seismic reinforcement structure for a suspended ceiling according to the present invention, the vertical reinforcing body is a steel frame member that connects the upper part of one of the adjacent hanging members and the lower part of the other hanging member. It may have a vertical brace.

In the seismic reinforcement structure of the ceiling configured in this manner, the upper part of one of the adjacent hanging members is connected to the lower part of the other hanging member using a vertical brace made of steel to provide seismic reinforcement. Therefore, since the length of the vertical brace only needs to be slightly longer than the interval between adjacent hanging members, the vertical brace can be carried into the ceiling space by making a small opening in the ceiling base material.

Moreover, in the seismic reinforcement structure for a suspended ceiling according to the present invention, the steel member may be joined to the member to be connected by drill screw joining.

In the ceiling seismic reinforcement structure configured in this manner, the steel members are joined to the members to be connected by drill screw joints. Therefore, it is possible to prevent a fire from occurring due to welding, and it is also possible to reduce the effort required to fasten a bolt to a nut by bolt connection.

Further, the method for constructing an earthquake-resistant reinforced structure for a suspended ceiling according to the present invention is a method for constructing the reinforced structure for a suspended ceiling described above, in which an opening is formed in the ceiling base material, and an opening is formed in the ceiling from the opening. The scaffold, the horizontal reinforcing body, and the vertical reinforcing body are brought in, the horizontal reinforcing body connects the plurality of horizontal members, and the vertical reinforcing body connects the horizontal structural member and the ceiling base material. .

In the method for constructing the seismic reinforcement structure for a ceiling configured in this way, horizontal reinforcement bodies and vertical reinforcement bodies are carried into the ceiling space through a small opening formed in the ceiling base material. To use existing ceiling beams and horizontal members without dismantling them, to connect a plurality of horizontal members with each other using horizontal reinforcing bodies, and to connect the horizontal members and ceiling base material with vertical reinforcing bodies. Therefore, earthquake reinforcement can be constructed without dismantling the existing suspended ceiling.

According to the seismic reinforcement structure for a suspended ceiling and the method for constructing an earthquake resistant reinforcement structure for a suspended ceiling according to the present invention, it is possible to construct an existing suspended ceiling without dismantling it.

It is a vertical sectional view showing the structure of an existing suspended ceiling. 1 is a vertical sectional view showing an earthquake-resistant reinforcement structure for a suspended ceiling according to an embodiment of the present invention. 3 is a view taken in the direction of arrow III in FIG. 2. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3. FIG. FIG. 3 is a diagram illustrating a method of constructing an earthquake-resistant reinforcement structure for a suspended ceiling according to an embodiment of the present invention.

An earthquake-resistant reinforcement structure for a suspended ceiling and a method for constructing an earthquake-resistant reinforcement structure for a suspended ceiling according to an embodiment of the present invention will be described with reference to the drawings.

First, the structure of an existing suspended ceiling before the seismic reinforcement structure for a suspended ceiling of this embodiment is applied will be described.
FIG. 1 is a vertical sectional view showing the structure of an existing suspended ceiling.
As shown in FIG. 1, an existing suspended ceiling structure 100 according to this embodiment is installed in a building such as a movie theater 1. The existing suspended ceiling structure 100 includes a ceiling structure 11 and a ceiling base material 16.

In the horizontal direction, the left and right sides of the paper in FIG. 1 are defined as direction X (first direction), and in the horizontal direction, the direction perpendicular to direction X is defined as direction Y (second direction).

The ceiling structure 11 is supported by an upper structure 18 such as a roof structure and a supporting member 19 such as a brace. The ceiling structure 11 includes a plurality of ceiling beams 12 and a plurality of horizontal members 13.

The ceiling beam 12 extends in the direction X. A plurality of ceiling beams 12 are arranged at intervals in the Y direction. The ceiling beam 12 is made of a steel frame material such as H-shaped steel, for example.

The horizontal member 13 extends in the Y direction. A plurality of horizontal members 13 are arranged at intervals in the direction X. The horizontal member 13 is made of a steel frame material such as C-shaped steel, for example. The horizontal member 13 is joined to the ceiling beam 12.

The ceiling base material 16 is suspended from the ceiling structure 11 by a supporting member such as a hanging member (not shown). A ceiling finishing material 17 is attached to the lower surface of the ceiling base material 16.

Next, a suspended ceiling seismic reinforcement structure 200 according to the present embodiment, which is seismically reinforced to an existing suspended ceiling structure 100, will be described.
FIG. 2 is a vertical cross-sectional view showing an earthquake-resistant reinforcement structure 200 for a suspended ceiling.
As shown in FIG. 2, the suspended ceiling seismic reinforcement structure 200 is installed in the ceiling space S above the ceiling base material 16 and below the structure 18, leaving the existing suspended ceiling structure 100 intact. . The seismic reinforcement structure 200 includes a horizontal reinforcement body 3 and a vertical reinforcement body 4.

FIG. 3 is a view taken along arrow III in FIG.
As shown in FIG. 3, the horizontal reinforcing body 3 connects a plurality of horizontal members 13 to each other. The horizontal reinforcing body 3 planarly reinforces the existing suspended ceiling structure 100 along the horizontal plane.

The horizontal reinforcement body 3 includes a plurality of reinforcing beams 31, a plurality of first horizontal braces 32, and a plurality of second horizontal braces 33.

The reinforcing beams 31 connect horizontal members 13 adjacent to each other in the direction X. The reinforcing beam 31 extends in the direction X. The length of the reinforcing beam 31 is a short member approximately equal to the distance between the horizontal members 13 adjacent to each other in the direction X. A plurality of reinforcing beams 31 are arranged at intervals in the Y direction. The reinforcing beam 31 is made of a steel frame material such as C-shaped steel, for example.

The longitudinal end of the reinforcing beam 31 is arranged to face the side surface of the horizontal member 13. The reinforcing beam 31 is joined to the horizontal member 13 by drill screw joining, for example, via a joining plate 31a provided at the end in the length direction.

The first horizontal brace 32 connects reinforcing beams 31 adjacent to each other in the Y direction. The first horizontal brace 32 extends in a direction along the horizontal plane and in a direction intersecting the X and Y directions. The length of the first horizontal brace 32 is a short member that is slightly longer than the interval between the reinforcing beams 31 adjacent to each other in the direction Y. A plurality of first horizontal braces 32 are arranged at intervals in the X direction and the Y direction. The first horizontal brace 32 is made of a steel frame material such as C-shaped steel, for example.

A longitudinal end of the first horizontal brace 32 is disposed above the reinforcing beam 31 . The ends of the first horizontal brace 32 are joined to the first horizontal brace 32 by a drill screw joint.

The second horizontal brace 33 connects the horizontal member 13 and the reinforcing beam 31. The second horizontal brace 33 extends in a direction along the horizontal plane and in a direction intersecting the X and Y directions. The length of the second horizontal brace 33 is a short member that is slightly longer than the interval between the reinforcing beams 31 adjacent in the direction Y and the interval between the horizontal members 13 adjacent in the direction X. A plurality of second horizontal braces 33 are arranged at intervals in the X direction and the Y direction. The second horizontal brace 33 is made of a steel frame material such as C-shaped steel, for example.

One end portion in the length direction of the second horizontal brace 33 is arranged above the reinforcing beam 31. One end of the second horizontal brace 33 is joined to the first horizontal brace 32 by a drill screw joint.

A joining plate 33a is joined to the other longitudinal end of the second horizontal brace 33 by, for example, drill screw joining. The joining plate 33a is joined to the horizontal member 13 by drill screw joining.

FIG. 4 is a cross-sectional view taken along the line IV--IV in FIG.
As shown in FIG. 4, the vertical reinforcing body 4 connects the horizontal member 13 and the ceiling base member 16. The vertical reinforcing body 4 reinforces the existing suspended ceiling structure 100 along the vertical plane.

The vertical reinforcement body 4 includes a hanging member 41 and a vertical brace 42.

The hanging member 41 connects the horizontal member 13 and the ceiling base member 16. The hanging member 41 extends in the vertical direction. The length of the hanging member 41 is a short member that is slightly longer than the distance between the horizontal member 13 and the ceiling base member 16. A plurality of hanging members 41 are arranged at intervals in the X direction and the Y direction. The hanging member 41 is made of a steel frame material such as a square steel pipe, for example.

The upper end of the hanging member 41 is joined to the horizontal member 13 by drill screw joining. The lower end of the hanging material 41 is joined to the ceiling base material 16 by drill screw joining.

The vertical braces 42 connect hanging members 41 adjacent to each other in the X direction and the Y direction. The vertical brace 42 connects the upper part of one hanging member 41 and the lower part of the other hanging member 41. The vertical brace 42 is made of a steel frame material such as C-shaped steel, for example. The end of the hanging material 41 is joined to the hanging material 41 by drill screw joining.

Next, a method of constructing the above suspended ceiling seismic reinforcement structure 200 will be described.
FIG. 5 is a diagram illustrating a construction method of a suspended ceiling seismic reinforcement structure 200.
As shown in FIG. 5, the seats s1 of the movie theater 1 are covered with curing sheets s2 and the like to protect them. A small opening 21 is made in a part of the ceiling base material 16 and ceiling finishing material 17. The size of the opening 21 should be such that short members such as a reinforcing beam 31, a first horizontal brace 32, a second horizontal brace 33, a hanging material 41, and a vertical brace 42, which will be described later, can be carried into the ceiling space S. Bye.

A scaffold 22 is installed so as to reach the opening 21. A scaffold 23 to be installed in the ceiling space S is carried in through the opening 21. The size of the members constituting the scaffolding 23 is such that it can be carried in through the opening 21. A scaffolding 23 is installed using the ceiling beams 12 and horizontal members 13 in the ceiling space S.

Members such as the reinforcing beam 31, the first horizontal brace 32, the second horizontal brace 33, the hanging material 41, and the vertical brace 42 are carried into the ceiling space S through the opening 21.

A hanging member 41 connects the horizontal member 13 and the ceiling base member 16. Adjacent hanging members 41 are connected to each other by vertical braces 42. Reinforcement beams 31 connect adjacent horizontal members 13 to each other. A first horizontal brace 32 connects adjacent reinforcing beams 31 to each other. A second horizontal brace 33 connects the horizontal member 13 and the reinforcing beam 31.

When the work in the ceiling space S is completed, the scaffolding 23 is dismantled and carried out through the opening 21, and after the work to close the opening 21 is performed, the scaffolding 22 is dismantled.

In the construction method of the suspended ceiling seismic reinforcement structure 200 and the suspended ceiling earthquake reinforcement structure 200 configured in this way, the existing ceiling beams 12 and horizontal members 13 are used without dismantling, and the horizontal reinforcement members 3 are used. A plurality of horizontal members 13 are connected to each other, and the horizontal members 13 and a ceiling base material 16 are connected by vertical reinforcing bodies 4. Therefore, earthquake reinforcement can be constructed without dismantling the existing suspended ceiling.

Further, adjacent horizontal members 13 are connected to each other using steel reinforcement beams 31 for seismic reinforcement. Therefore, since the length of the reinforcing beam 31 may be equal to the distance between adjacent horizontal members 13, the reinforcing beam 31 can be carried into the ceiling space S by opening a small opening 21 in the ceiling base material 16.

Moreover, the reinforcement beams 31 adjacent to each other in the direction Y are connected to each other by the first horizontal brace 32 made of steel for seismic reinforcement. Therefore, since the length of the first horizontal brace 32 may be slightly longer than the interval between the reinforcing beams 31 adjacent to each other in the direction Y, a small opening 21 is opened in the ceiling base material 16 and the first horizontal brace is inserted into the ceiling space S. 32 can be brought in.

Further, the horizontal member 13 and the reinforcing beam 31 are connected to each other by a second horizontal brace 33 made of steel for earthquake reinforcement. Therefore, the length of the second horizontal brace 33 only needs to be slightly longer than the distance from the horizontal member 13, so a small opening 21 is opened in the ceiling base material 16 and the second horizontal brace 33 is carried into the ceiling space S. can do.

In addition, the horizontal frame members 13 and the ceiling base material 16 are connected to each other using steel frame hanging members 41 for seismic reinforcement. Therefore, the length of the hanging material 41 may be equal to the distance between the horizontal member 13 and the ceiling base material 16, so that the hanging material 41 can be carried into the ceiling space S by making a small opening 21 in the ceiling base material 16. .

Moreover, the upper part of one of the adjacent hanging members 41 and the lower part of the other hanging member 41 are connected by a vertical brace 42 made of steel for seismic reinforcement. Therefore, since the length of the vertical brace 42 only needs to be slightly longer than the interval between adjacent hanging members 41, the vertical brace 42 can be carried into the ceiling space S by opening a small opening 21 in the ceiling base material 16. .

Further, the steel frame member is joined to the member to be connected by drill screw joining. Therefore, it is possible to prevent a fire from occurring due to welding, and it is also possible to reduce the effort required to fasten a bolt to a nut by bolt connection.

Note that the assembly procedure shown in the above-described embodiments, the shapes and combinations of each component, etc. are merely examples, and various changes can be made based on design requirements and the like without departing from the gist of the present invention.

The Sustainable Development Goals (SDGs) are among the 17 international goals adopted at the United Nations Summit in September 2015. The suspended ceiling seismic reinforcement structure 200 according to this embodiment can contribute to the achievement of, for example, the goal of "11. Creating cities where people can continue to live" among the 17 goals of the SDGs.

3 Horizontal reinforcement 4 Vertical reinforcement 11 Ceiling structure 12 Ceiling beam 13 Horizontal member 16 Ceiling base material 21 Opening 31 Reinforcement beam 32 First horizontal brace 33 Second horizontal brace 41 Hanging member 42 Vertical brace 100 Existing suspended ceiling Structure 200 Suspended ceiling seismic reinforcement structure X 1st direction Y 2nd direction

Claims (8)

A ceiling structure having a plurality of existing ceiling beams extending in a first direction, and a plurality of horizontal members extending horizontally on the plurality of ceiling beams and extending in a second direction perpendicular to the first direction and along a horizontal plane. A suspended ceiling seismic reinforcement structure comprising a ceiling base material supported by a body,
a horizontal reinforcing body that connects the plurality of horizontal members;
An earthquake-resistant reinforcement structure for a suspended ceiling, comprising: a vertical reinforcing body that connects the horizontal member and the ceiling base material. The horizontal reinforcement body is
The seismic reinforcement structure for a suspended ceiling according to claim 1, further comprising a reinforcing beam that is a steel frame member that connects the adjacent horizontal members and extends in the first direction. The horizontal reinforcement body is
A first horizontal brace that connects the reinforcing beams adjacent to each other in the second direction, extends in a direction intersecting the first direction and the second direction and along a horizontal plane, and is a member made of a steel frame. The seismic reinforcement structure of the suspended ceiling described in 2. The horizontal reinforcement body is
3. The method according to claim 2, further comprising a second horizontal brace that connects the horizontal member and the reinforcing beam, extends in a direction intersecting the first direction and the second direction and along a horizontal plane, and is a steel member. Seismic reinforcement structure for the suspended ceiling described. The vertical reinforcement body is
The seismic reinforcement structure for a suspended ceiling according to claim 1, further comprising a hanging member that is a steel frame member that connects the horizontal frame member and the ceiling base member and extends in the vertical direction. The vertical reinforcement body is
The seismic reinforcement structure for a suspended ceiling according to claim 5, further comprising a vertical brace that is a steel frame member that connects the upper part of one of the adjacent hanging members and the lower part of the other hanging member. The seismic reinforcement structure for a suspended ceiling according to claim 2 or 3, wherein the steel member is joined to the member to be connected by drill screw joining. A method for constructing an earthquake-resistant reinforcement structure for a suspended ceiling according to claim 1, comprising:
forming an opening in the ceiling base material,
Carrying the scaffolding, the horizontal reinforcing body, and the vertical reinforcing body into the ceiling from the opening,
connecting the plurality of horizontal members with the horizontal reinforcing body;
A method for constructing an earthquake-resistant reinforcement structure for a suspended ceiling, in which the vertical reinforcing body connects the horizontal member and the ceiling base material.

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