JP2017031707A - Suspension ceiling reinforcement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension ceiling reinforcement structure capable of controlling an ultimate state when deformation-displacement exceeding assumption are caused, while securing function maintenance performance within an elastic deformation-displacement range caused by an earthquake.SOLUTION: A suspension ceiling reinforcement structure C for reinforcing a suspension ceiling structure B, is provided with a ceiling backing 7 formed by juxtaposing a main steel material at a predetermined interval in horizontal one direction T1 and suspended-supported by an upper structure 3 of a building skeleton and a ceiling material 6 installed in the main steel material of the ceiling backing 7 and forming a ceiling surface, and is provided with a reinforcement brace 10, and this reinforcement brace 10 is provided by rotatably connecting the upper end part side around the axis to a shaft part supported by the upper structure 3 while turning the axial direction in the horizontal direction, and rotatably connecting the lower end part side around the axis to the shaft part supported by the ceiling backing 7 or the ceiling material 6 while turning the axial direction in the horizontal direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a suspended ceiling reinforcing structure.

  Conventionally, suspended ceilings are frequently used as ceilings of buildings such as schools, hospitals, production facilities, gymnasiums, pools, airport terminal buildings, office buildings, theaters, cinecones, etc. (see, for example, Patent Document 1 and Patent Document 2). . And, for example, as shown in FIG. 4, the suspended ceiling A has a plurality of field edges 1 arranged in parallel in one horizontal direction T <b> 1 at a predetermined interval, and another horizontal direction orthogonal to the field edge 1. A plurality of field receivers 2 provided in parallel with T2 at a predetermined interval and provided integrally connected to a plurality of field edges 1, a lower end connected to the field receiver 2, and an upper end as an upper floor material A plurality of suspension bolts 4 fixedly attached to the upper structure (building frame) 3 and the like, and a grid-like ceiling base 7 composed of a field edge 1 and a field edge receiver 2 and screwed together, Some have a ceiling panel (ceiling material) 6 such as a gypsum board that forms a ceiling surface (ceiling part 5).

  Further, as shown in FIG. 5, for example, a suspended ceiling A in which a heavy equipment such as a fan filter unit needs to be installed on the ceiling 5 as in a clean room, a predetermined interval in a horizontal direction T1 is provided. A plurality of T-bars 8 arranged in parallel and extending in the other direction T2 orthogonal to one direction T1 and a plurality of suspensions arranged with the upper end fixed to the upper structure 3 and the lower end side connected to the T-bar 8 There is also a configuration that includes a bolt 4 and a ceiling panel 6 that is screwed to a ceiling base 7 made of a T-bar 8 or the like and is integrally attached to form a ceiling surface (ceiling portion 5).

  Here, the suspended ceiling A formed by supporting the ceiling edge 7 and the ceiling panel 6 such as the field edge 1 and the field edge receiver 2 and the T-bar 8 with the suspension bolt 4 in this way is structurally resistant to an earthquake. It is easy to roll due to the acting horizontal force. Then, when the earthquake sways, the end portion 5a of the ceiling portion 5 may collide with a building component (building frame) 9 such as a wall, a column, or a beam, and the ceiling panel 6 may be damaged or fallen off. there were.

  For this reason, conventionally, the upper end is connected to the suspension structure side of the upper structure 3 and the suspension bolt 4 and the lower end is connected to the ceiling base 7 such as the suspension bolt 4, the field edge 1, the field edge receiver 2, and the T-bar 8. The reinforcing brace (brace material) 10 is obliquely connected to suppress the rolling of the ceiling portion 5 including the ceiling base 7 and the ceiling panel 6 during an earthquake (see FIG. 5).

  The upper and lower ends of the reinforcing brace 10 are connected to the suspension bolt 4, the upper structure of the building, and the ceiling base 7, and a horizontal force is borne by the suspension bolt 4, the ceiling base 7 and the reinforcing brace 10. . The reinforcing brace 10 is connected to the suspension bolt 4, the upper structure of the building, and the ceiling base 7 using the mounting brackets 11 and 12 as shown in FIGS. 6 and 7, for example. Yes.

JP 2008-121371 A JP 2005-350950 A

  On the other hand, the above-mentioned conventional reinforcing brace 10 has an upper end and a lower end as shown in FIGS. 6 and 7, using the mounting brackets 11 and 12, the suspension bolt 4, the upper structure of the building, and the fixed portion 13 connected to the ceiling base 7. Shows a rigid-pin-like behavior during the initial behavior due to an earthquake. That is, in the conventional suspended ceiling A, when an external force acts on the suspended ceiling A due to an earthquake or the like, a bending moment is generated in the fixed portion 13 as the applied force progresses, and buckling occurs with the generation of the bending moment. Thus, an external force acting on the suspended ceiling A due to an earthquake or the like is transmitted to and borne by the reinforcing brace 10.

  And in the conventional suspended ceiling A comprised in this way, when very big external force acts, it begins to lose proof strength from a weak part among surrounding joining members, screws, reinforcement braces 10, etc., and eventually ends. However, if the specifications of the mounting brackets 11, 12, the hanging length, the ceiling weight, etc. are different due to the rigid-pin-like behavior of the fixing portions 13 at the upper end and the lower end of the reinforcing brace 10, the final result is reached. The situation will change.

  That is, the upper end of the reinforcing brace 10 can be used to maintain the function maintaining performance within an elastic deformation / displacement range due to an earthquake and the like, and to be able to control the ultimate situation when the deformation / displacement exceeds the expected range. However, the conventional suspended ceiling A has not been able to realize this.

  In view of the above circumstances, the present invention makes it possible to control the ultimate situation when deformation / displacement exceeding the assumption occurs while ensuring the function maintenance performance within an elastic deformation / displacement range associated with an earthquake or the like. An object is to provide a suspended ceiling reinforcement structure.

  In order to achieve the above object, the present invention provides the following means.

  The suspended ceiling reinforcing structure of the present invention includes a main base material arranged side by side in a horizontal direction at a predetermined interval, and is suspended and supported by an upper structure of a building frame, and the main base material of the ceiling base is provided. A suspended ceiling reinforcing structure for reinforcing a suspended ceiling structure comprising a ceiling material attached to a steel material to form a ceiling surface, comprising a reinforcing brace, wherein the reinforcing brace has an upper end side in an axial direction. The shaft portion supported by the upper structure while being horizontally oriented is connected to the shaft portion so as to be rotatable around the axis, and the lower end portion is supported by the ceiling base or the ceiling material while the axis direction is oriented horizontally. The shaft portion is provided so as to be rotatable around an axis line.

  Moreover, in the suspended ceiling reinforcement structure of this invention, it may be comprised including the brace lower attachment tool which has the said axial part and adheres to the said ceiling material, and is arrange | positioned.

  According to the suspended ceiling reinforcing structure of the present invention, the upper end portion side and the lower end portion side of the reinforcing brace are rotatably connected to the shaft portion, respectively, so that the fixing portion on the upper end portion side and the fixing portion on the lower end portion side are provided. Can be reliably brought into a pin-coupled state.

  Thereby, the fixed part of the upper end part and lower end part of a reinforcement brace shows the stable behavior (a dispersion | variation is excluded), and it can always be made to damage the assumed member. Therefore, it becomes possible to control the ultimate situation when deformation / displacement exceeding the assumption occurs, while ensuring the function maintenance performance within the range of elastic deformation / displacement associated with an earthquake.

It is a figure which shows the suspended ceiling reinforcement structure which concerns on one Embodiment of this invention. It is a figure which shows the fixing | fixed part by the side of the upper end part of the reinforcement brace of the suspended ceiling reinforcement structure which concerns on one Embodiment of this invention. It is a figure which shows the fixing | fixed part by the side of the lower end part of the reinforcement brace of the suspended ceiling reinforcement structure which concerns on one Embodiment of this invention. It is a perspective view which shows a suspended ceiling structure. It is a perspective view which shows a suspended ceiling structure. It is a perspective view which shows an example of the upper mounting bracket (fixed part of an upper end part side) of the conventional reinforcement brace. It is a perspective view which shows an example of the lower attachment metal fitting (fixed part of a lower end part) of the conventional reinforcement brace.

  Hereinafter, a suspended ceiling reinforcing structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3 and FIG. 5.

  Here, in the present embodiment, for example, a suspension ceiling used as a ceiling of a building such as a school, a hospital, a production facility, a gymnasium, a pool, an airport terminal building, an office building, a theater, or a cine-container is installed for earthquake-proof reinforcement and earthquake-proof repair The present invention relates to a ceiling reinforcement structure.

  First, as shown in FIG. 5, the suspended ceiling (suspended ceiling structure) B of the present embodiment has a plurality of horizontal spaces extending in the other direction T <b> 2 perpendicular to the one direction T <b> 1 with a predetermined interval in the one direction T <b> 1. T-bar (reverse T-shaped main steel material) 8, a plurality of suspension bolts 4 with the upper end fixed to the upper structure 3 and the lower end connected to the T-bar 8, and screws on the ceiling base 7 A ceiling panel (ceiling material) 6 that is fastened and integrally attached to form a ceiling surface (ceiling part 5) is provided.

  In addition, the suspended ceiling B has a plurality of connection T bars (inverted T-shaped connection steel members having a cross section of an inverted T shape) that extend in one direction T2 with a predetermined interval in the other direction T2 and span and connect to adjacent T bars 8. The ceiling base 7 is constituted by a T bar 8 and the connecting T bar, that is, a steel material assembled in a lattice shape.

  Furthermore, the suspension bolt 4 is provided by connecting the lower end side to the T bar 8 of the ceiling base 7 via a suspension member connecting bracket, and supports the ceiling base 7 in a suspended manner.

  Further, a lightweight ceiling panel 6 such as a directly-attached rock wool sound absorbing board is fixed on the lower surface of the ceiling base 7 with a screw passing through the ceiling panel 6 and the ceiling base 7 from below. In this way, the ceiling surface is formed by attaching the plurality of ceiling panels 6 to the ceiling base 7.

  On the other hand, in the suspended ceiling B of the present embodiment, as shown in FIG. 1, a suspended ceiling reinforcing structure for suppressing a ceiling inertia force (horizontal force) when an earthquake occurs and suppressing a roll of the ceiling portion 5. C is provided.

  The suspended ceiling reinforcing structure C of the present embodiment includes a reinforcing brace 10, a brace upper fixture 15 for connecting the upper end of the reinforcing brace 10 to the upper structure 3 of the building frame, and a lower end of the reinforcing brace 10 as a ceiling panel. 6 and a brace lower fixture 16 for connection to the motor. That is, the suspended ceiling reinforcing structure C of the present embodiment is configured by connecting the lower end portion of the reinforcing brace 10 to the ceiling panel 6 instead of the suspension bolts 4 and the ceiling base 7 as in the prior art. Note that the lower end of the reinforcing brace 10 may be connected to the ceiling base 7.

  Moreover, in the suspended ceiling reinforcement structure C of this embodiment, the reinforcement brace 10 is a shape steel material, a pair of reinforcement brace 10 is made into one set, and this pair of reinforcement brace 10 is made into one direction T1 and / or others. It is arranged side by side in the direction T2 so as to exhibit a V-shape or a letter-shape when viewed from the front, and the upper and lower ends of each reinforcing brace 10 are the upper structure of the building with the brace upper fixture 15 and the brace lower fixture 16, respectively. 3 and the ceiling panel 6 are connected.

  Next, as shown in FIG. 2, the brace upper fixture 15 of the present embodiment includes a fixing member 20 and a cylindrical rod-shaped shaft portion 21 that is provided integrally with the fixing member 20 with the axis O <b> 1 disposed in the horizontal direction. The connecting brace 10a integrally provided on the upper end side of the reinforcing brace 10 is connected to the shaft portion 21 to support the reinforcing brace 10.

  The fixing member 20 is a member for fixing the brace upper fixture 15 to the upper structure 3 of the building frame. The fixing member 20 is bonded to the surface of the upper structure 3 and has an upper end on the fixing plate 20a. A pair of support plates 20b that are connected and projecting downward and disposed at a predetermined interval are formed.

  Further, the fixing plate 20 a is formed with a mounting hole 20 c for inserting a bolt 23 fixed to the upper structure 3 with an anchor or the like and fixing the fixing member 20 to the surface of the upper structure 3. In addition, the mounting hole 20c is disposed substantially at the center in the width direction of the fixed plate 20a, and is disposed closer to one end than the center in the depth direction of the fixed plate 20a.

  The shaft portion 21 is disposed with its both ends supported by a pair of support plates 20b.

  In the suspended ceiling B and suspended ceiling reinforcing structure C of this embodiment, the shaft portion 21 is inserted into the insertion hole 10b provided at the tip of the connecting rod 10a, and the upper end portion of the reinforcing brace 10 is the brace upper fixture. 15 is connected.

  As a result, the fixing portion 24 that fixes the upper end portion side of the reinforcing brace 10 of the present embodiment to the upper structure 3 can be rotated around the axis O <b> 1 extending in the horizontal direction of the shaft portion 21. Is connected to the upper structure 3.

  Next, as shown in FIG. 3, the brace lower fixture 16 of the present embodiment has a cylindrical rod-shaped shaft portion 25 disposed with the axis O2 direction oriented in the horizontal direction, and the plate surface oriented in the lateral direction. A brace connecting portion 26 that is erected and supports the shaft portion 25 so as to be rotatable about the axis O2, and extends from a lower end of the brace connecting portion 26 in a lateral direction perpendicular to the brace connecting portion 26, and a lower surface of the ceiling panel 6 And a ceiling material fixing portion 28 that is fixed to the ceiling panel 6 by driving in screws 27 from the lower surface (ceiling surface) side of the ceiling panel 6. .

  The lower end of the reinforcing brace 10 is connected to the shaft portion 25 of the brace lower fixture 16 via a connecting rod 10c.

  As a result, the fixing portion 29 for fixing the lower end portion side of the reinforcing brace 10 of the present embodiment to the ceiling panel 6 is configured so that the lower end portion side can freely rotate around the axis O2 extending in the horizontal direction of the shaft portion 25. Is connected to the ceiling panel 6 (ceiling part 5).

  Here, the brace lower fixture 16 is formed with a length L larger than the interval (span) between adjacent T-bars 8 and is recessed upward from the lower surface on the lower end side of the brace lower fixture 16. In the state where the brace lower fixture 16 is installed, the T-bar 8 of the ceiling base 7 is fitted to form a ceiling base fitting recess (not shown) for preventing interference with the ceiling base 7. Is preferred. Moreover, you may make it provide a pair of ceiling base fitting recessed part for making each adjacent T-bar 8 fit.

  Further, the ceiling foundation fitting recess may be formed with a field fitting recess adapted to the size and position of the field edge 1 and a T bar fitting recess adapted to the size and position of the T bar 8. Good. When the ceiling base mating recess is configured in this way, the same brace is used in either case where the ceiling base 7 is formed with the field edge 1 or when it is formed with the T bar 8. A lower fixture 16 can be applied.

  And in the suspended ceiling reinforcement structure C of this embodiment which consists of the said structure, since the upper end part side and lower end part side of the reinforcement brace 10 are rotatably connected with the axial parts 21 and 25, respectively, an upper end part is provided. The fixing part 24 on the side and the fixing part 29 on the lower end part side can be surely brought into a pin-coupled state.

  Thereby, the fixing parts 24 and 29 of the upper end part and the lower end part of the reinforcement brace 10 show a stable behavior (variation is eliminated), and the assumed member can always be damaged. Therefore, it becomes possible to control the ultimate situation when deformation / displacement exceeding the assumption occurs, while ensuring the function maintenance performance within the range of elastic deformation / displacement associated with an earthquake.

  Further, in the suspended ceiling reinforcing structure C of the present embodiment, the lower end portion is not the main steel material (T bar 8 or field edge 1) of the ceiling base 7 as in the prior art, but the ceiling panel 6 via the brace lower fixture 16. The reinforcement brace 10 can be installed. Thereby, the reinforcing brace 10 can be provided without being restricted by the position of the ceiling base 7 or the like, and the reinforcing brace 10 can be provided without being restricted by the strength of the ceiling base 7 or the like.

  Since the reinforcing brace 10 can be provided without being restricted by the position of the ceiling base 7 and the like, it is possible to greatly increase the degree of freedom of earthquake-proof reinforcement and earthquake-resistant repair by the reinforcing brace 10.

  In addition, since the reinforcing brace 10 can be provided without being restricted by the strength of the ceiling base 7, it is possible to install a reinforcing brace having a larger size and higher proof strength than conventional ones. That is, for example, conventionally, a C-40 × 20 × 10 × 1.6 sized steel shape is frequently used as a reinforcing brace. However, in the suspended ceiling reinforcing structure C of the present embodiment, when the suspension length is less than 1000 mm, C-40 × 20 × 10 × 1.6 is used, C-65 × 30 × 10 × 1.6 when the suspended length is less than 1000-2000 mm, C when the suspended length is 2000-3000 mm or less It becomes possible to use a large-sized section steel such as −75 × 45 × 15 × 1.6 as the reinforcing brace 10. Therefore, also from this point, it becomes possible to greatly increase the degree of freedom of the seismic reinforcement and the seismic retrofit by the reinforcing brace 10.

  Further, the brace lower fixture 16 is formed with a length L larger than the interval between adjacent main steel materials, that is, by being formed with a length L larger than one span of the ceiling base 7. A horizontal force acting on the ceiling portion 5 including the ceiling base 7 and the ceiling panel 6 during an earthquake can be effectively transmitted to the reinforcing brace 10. Thereby, by providing this suspended ceiling reinforcement structure C, the suspended ceiling B can be made highly rigid, for example, in a natural period of 0.1 seconds or less, and it is possible to provide very excellent seismic performance. That is, highly reliable seismic reinforcement and seismic retrofit can be realized.

  Further, the brace lower fixture 16 is placed at an arbitrary position on the ceiling panel 6 and fastened with screws 27 from the lower side of the ceiling surface to be fixed to the ceiling panel 6 so that the brace lower fixture 16 can be easily attached to the ceiling. The panel 6 can be installed integrally. Thereby, compared with the past, the workability which installs the reinforcement brace 10 can be improved significantly.

  Therefore, according to the suspended ceiling reinforcing structure C of the present embodiment, it becomes possible to eliminate the restriction of the installation position of the reinforcing brace 10 and to effectively and efficiently suspend and reinforce the suspended ceiling structure B. It becomes possible to give excellent earthquake resistance.

  As mentioned above, although one embodiment of the suspended ceiling reinforcement structure concerning the present invention was described, the present invention is not limited to the above-mentioned one embodiment, and can be suitably changed in the range which does not deviate from the meaning.

  For example, in the present embodiment, the ceiling foundation 7 is configured to include a plurality of T bars 8 (main steel materials), but the ceiling foundation according to the present invention has a field edge 1 (main steel material) and a field edge. The ceiling base 7 configured to include the receiver 2 may be used. The same effect as that of the present embodiment can be obtained by applying the present invention to a suspended ceiling including the field edge 1 and the field edge receiver 2 and having the ceiling base 7 configured.

  In the present embodiment, the suspension ceiling reinforcing structure according to the present invention has been described so as to seismically reinforce and retrofit the existing suspended ceiling. Of course, the suspended ceiling reinforcing structure according to the present invention is suspended. It may be installed when a new ceiling is installed.

  Further, in the present embodiment, the lower end portion of the reinforcing brace 10 has been described as being pivotally connected to the ceiling panel 6 via the brace lower fixture 16, but the lower end portion of the reinforcing brace 10 is attached to the ceiling base 7. You may make it connect so that rotation is possible. Even in this case, the same effect as the present embodiment can be obtained.

1 Field edge (main steel)
2 Field Margin 3 Superstructure 4 Suspension bolt (suspending member)
5 Ceiling part 6 Ceiling panel (ceiling material)
7 Ceiling base 8 T bar (main steel)
9 Building components (building frame)
DESCRIPTION OF SYMBOLS 10 Reinforcing brace 10a Connecting rod 10b Insertion hole 10c Connecting rod 11 Conventional mounting bracket 12 Conventional mounting bracket 13 Conventional fixing portion 15 Brace upper mounting fixture 16 Brace lower mounting fixture 20 Fixing member 20a Fixing plate 20b Support plate 20c Mounting hole 21 Shaft portion 23 Bolt 24 Fixing portion 25 Shaft portion 26 Brace connecting portion 27 Screw 28 Ceiling material fixing portion A Conventional suspended ceiling (suspended ceiling structure)
B Suspended ceiling (suspended ceiling structure)
C Suspended ceiling reinforcement structure L Length of brace lower fixture O1 Axis O2 Axis T1 One direction T2 Other direction T3 Vertical direction

Claims (2)

A main steel material is arranged in parallel in a horizontal direction with a predetermined interval, and a ceiling base that is suspended and supported by the upper structure of the building frame, and a ceiling surface that is attached to the main steel material of the ceiling base A suspended ceiling reinforcing structure for reinforcing a suspended ceiling structure comprising a ceiling material
With reinforcing braces,
The reinforcing brace is pivotally connected to the shaft supported by the upper structure with the upper end side directed in the horizontal direction, and the lower end side is directed horizontally in the horizontal direction. However, the suspended ceiling reinforcing structure is provided by being connected to a shaft portion supported by the ceiling base or the ceiling material so as to be rotatable around an axis. The suspended ceiling reinforcing structure according to claim 1,
A suspended ceiling reinforcing structure, comprising: a brace lower fixture that includes the shaft portion and is fixedly disposed on the ceiling member.

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