JP5682035B2 - Vibration control structure - Google Patents

Description

  The present invention relates to a vibration control structure in a building.

  As a building damping structure, for example, as shown in Patent Document 1 and Patent Document 2, a structure in which an in-plane interlayer deformation of a frame in the event of an earthquake is controlled by a damping damper to obtain a damping effect is well known. FIG. 3 shows the basic configuration of this type of vibration control structure.

This is because a damping frame 3 such as an oil damper and its damping damper are provided in a frame F for one span and one layer of a rectangular frame constituted by left and right columns 1 and upper and lower beams (large beams) 2. A brace 4 as a displacement transmission mechanism for actuating 3 is installed as a V-shape.
In the illustrated example, both upper end portions of the brace 4 are joined to the upper joint portion (column beam joint portion) j1 of the frame frame F, and a central bracket 5 is attached to the lower apex portion of the brace 4 on the lower layer side. It is provided in a state where it can be displaced relative to the beam 2 in-plane, and damping dampers 3 are installed on both sides of the central bracket 5 to join one end of each damping damper 3 to the central bracket 5. The other end is joined to the column base 1 a of the column 1 via the bracket 6.
Thereby, in-plane interlayer deformation (deformation in which the upper and lower beams 2 are displaced in the axial direction) during the earthquake is transmitted to the damping damper 3 via the brace 4, and the damping damper 3 is moved in the axial direction. By operating so as to expand and contract, deformation and vibration of the frame F are suppressed and quickly damped.

JP 2001-140498 A JP 2010-242381 A

  However, in the conventional general vibration damping structure shown in FIG. 3, the vibration damping damper 3 and the central bracket 5 are installed in an exposed state on the floor surface (slab) in the frame F. There is a limitation in the architectural plan that it is limited, so it cannot be widely applied to general buildings.

Further, in the above-described conventional vibration damping structure, as shown in the drawing, the upper end portions of the brace 4 can be directly joined to the joint j1 at the upper portion of the frame F, so that the stress transmission there is smooth. However, since the bracket 6 to which the other end of the damping damper 4 is joined cannot be joined to the lower joint portion j2, the bracket base 1a exposed on the floor surface can be joined. Therefore, the stress transmission between the lower part of the frame F and the damping damper 3 is not always smooth, and the axial force of the damping damper 3 is applied to the column base 1a by the eccentric bending load. Will act as.
Therefore, in the above conventional structure, in order to operate the damping damper 3 reliably and efficiently, sufficient stiffening is required for the column base part 1a and the lower joint part j2, which makes the structure there complicated. The number of steel frames tends to increase.

  In view of the above circumstances, the present invention has less restrictions on the installation of the vibration damper, and the stress transmission between the frame and the vibration damper is smoothly performed, so that the joint is not complicated. An object of the present invention is to provide an effective and appropriate damping structure capable of operating a vibration damper efficiently.

  According to the first aspect of the present invention, a damping damper is incorporated in a main frame of one span and one layer constituted by connecting pillars and beams in a building via a joint portion, and is generated in the frame. A damping structure for obtaining a damping effect by transmitting an in-plane interlayer displacement to the damping damper via a displacement transmission mechanism and operating the damping damper, wherein a frame for incorporating the damping damper is provided. By forming a three-way frame with two columns on both sides and one beam built between only the upper part or the lower part between the pillars, the upper part or the lower part between the pillars A damper space for installing the damping damper is secured in either one of them, the damping damper is installed in the damper space, and one end portion of the damping damper is connected to the damper via the displacement transmission mechanism. It is connected to the joint part of the frame, and the other end of the vibration damper is connected to the joint part in another frame adjacent to the frame. .

  A second aspect of the present invention is the vibration damping structure according to the first aspect, wherein the displacement transmission mechanism is joined to a V-shaped or inverted V-shaped brace and a vertex that is a lower part or an upper part of the brace. The upper part or lower part of the brace in the displacement transmission mechanism is connected to the upper or lower joint of the frame frame, and the central bracket is secured to the lower part or upper part of the frame frame. Arranged in the center of the damper space, two damping dampers are installed in the damper space on both sides of the center bracket, and one end of each damping damper is placed in the center Connect to the bracket, and connect the other end of each damping damper to the other frame frame joints adjacent to the frame And characterized by being connected via a bracket against.

  A third aspect of the present invention is the vibration damping structure according to the first or second aspect, wherein a small beam for supporting a slab is provided on each side of the damper space.

  According to the present invention, in a normal frame, either one of the two beams provided at the top and bottom is omitted to secure a damper space therein, and the damper space is replaced with the omitted beam. By installing the damping damper, it is possible to install the damping damper in a concealed state under the floor or behind the ceiling. Therefore, compared to the conventional case where the damping damper is installed exposed on the floor surface. The restrictions on the architectural plan are reduced, it is easy to secure an installation space, and it can be widely applied to general buildings.

  Further, according to the present invention, by installing the damping damper in the damper space instead of the beam, it is possible to join the damping damper to the joint portion in another adjacent frame. Therefore, the stress transmission there is smooth and the damping damper can be operated efficiently and reliably, and is necessary when joining the damping damper to the column base as in the past. As a result, there is no need to stiffen the column base and the joint, so that the structure is not complicated and the number of steel frames does not increase.

By constructing the displacement transmission mechanism with a V-shaped or inverted V-shaped brace and a central bracket joined thereto, the damping damper can be operated efficiently and reliably via the displacement transmission mechanism.
Further, if necessary, by providing a small beam on both sides of the damper space, it is possible to support the slab without trouble even if the beam to be originally provided is omitted.

It is a figure which shows embodiment of the damping structure of this invention. It is a figure which shows other embodiment same as the above. It is a figure which shows the basic composition of the conventional general vibration suppression structure.

An embodiment of the vibration damping structure of the present invention is shown in FIG.
This is equivalent to one span of one layer composed of a pillar 1 and a beam (large beam) 2 (between the nth floor and the (n + 1) th floor in the illustrated example) in the same manner as the conventional vibration damping structure shown in FIG. )), The vibration damper 3 and the V-shaped brace 4 as a displacement transmission mechanism are basically installed. However, conventionally, the vibration damper 3 and the central bracket 5 are connected to the floor surface ( In contrast to the installation in an exposed state on the slab), the main object of the present embodiment is to install them in a concealed state under the floor.
For that purpose, in the vibration damping structure of the present embodiment, in the frame F where the damping damper 3 is to be installed, the beam (large beam) on the lower layer side is omitted, and the damping damper 3 and the central bracket 5 are provided there. A damper space 7 is secured for installation.

Specifically, in this embodiment, the frame F on which the damping damper 3 is to be installed is an upper layer side constructed between the columns 1 on both sides and the upper portions of the columns 1 as shown in FIG. It has a three-way frame shape with one beam 2 (that is, a large beam as a floor beam of the (n + 1) floor), and is usually a lower-side beam (that is, n-th A large beam as a floor beam is omitted, and a damper space 7 is secured there.
However, the omission of the beam as described above is performed only on the frame F where the damping damper 3 is to be installed, and other frames adjacent to the frame 1 sharing the frame 1 with the column 1 are located above and below the frame. It is assumed that each frame frame has a normal rectangular frame shape with beams 2.

In addition, when it becomes impossible to stably support the slab on the floor by omitting the beam as described above, the slab 8 is supported on both sides of the damper space 7 as shown in (b) and (c). The beam 9 may be provided.
In that case, as shown in (c), by placing concrete so as to be integrated with the slab 8 between the small beams 9, a recess having a groove-shaped cross section as the damper space 7 is formed, whereby the slab 8 is formed. Can be secured without hindrance, and a horizontal section between the lower floor can be secured without hindrance, and a stiffening effect on the frame F can be expected by the small beams 9.

  In the present embodiment, as in the case of the conventional vibration damping structure shown in FIG. 3, the upper ends of the V-shaped brace 4 are joined to the joint portion j1 at the upper part of the frame, and the brace 4 The central bracket 5 joined to the lower apex of each is disposed in the middle of the damper space 7, the damping dampers 3 are disposed in the damper spaces 7 on both sides thereof, and one end of each damping damper 3 is centered While being joined to the part bracket 5, the other end of each damping damper 3 is joined to the joint part j <b> 2 at the lower part of the adjacent frame F via the bracket 6.

  If necessary, a lid 10 functioning as a finishing floor is mounted on the upper part of the damper space 7 so as to be at the same level as the surrounding floor surface, and the damping damper 3 and the central bracket 5 are concealed under the floor. Just do it. In that case, an opening 10a for allowing the brace 4 to pass through is provided in the lid body 10, and a clearance taking into account the displacement of the brace 4 during the earthquake (relative displacement with respect to the frame F) is secured in the opening 10a. And good.

  By installing the damping damper 3 and the central bracket 5 in the damper space 7 secured under the floor as described above, compared with the conventional case where they are installed on the floor surface in an exposed state, the construction plan Therefore, it becomes easy to secure the installation space, so that the vibration damping structure of the present invention can be widely applied to general buildings.

Further, by installing the damping damper 3 under the floor, it is possible to join the damping damper 3 to the lower joint portion j2 of the adjacent frame F without any hindrance. Since it is not necessary to join to 1a, stress transmission there is smooth, and no eccentric bending load acts on the column base 1a.
Therefore, according to the present invention, the vibration damping damper 3 can be operated efficiently and reliably, and it is not necessary to stiffen the periphery of the column base 1a or the lower joint j2 as in the prior art. There is no complication of the structure and the number of steel frames does not increase.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and the type and number of vibration dampers 3 installed, the displacement of braces for operating the vibration damper 3, etc. As a matter of course, the specific configuration and other specifications of the transmission mechanism can be appropriately designed and changed.

For example, in the above embodiment, the beam on the lower layer side of the frame F is omitted and the damper space 7 is secured there. However, as shown in FIG. In addition, a configuration in which the damper space 7 is secured and the brace 4 as the displacement transmission mechanism is installed in an inverted V shape functions in the same manner.
In this case, a finishing ceiling 11 may be provided below the damper space 7 as necessary to conceal the damping damper 3 and the central bracket 5 from the back of the ceiling.

F Frame frame j1 Joint part (upper part)
j2 Joint part (lower part)
1 Column 1a Column base 2 Beam (large beam)
3 Damping damper 4 Brace (displacement transmission mechanism)
5 Central bracket 6 Bracket 7 Damper space 8 Slab 9 Beam 10 Lid 10a Opening 11 Finish ceiling

Claims (3)

Damping dampers are installed at the key points of one span of one frame constructed by connecting columns and beams in a building via joints, and in-plane interlayer displacements generated in the frame are displaced by a displacement transmission mechanism. A damping structure for obtaining a damping effect by transmitting the damping damper to the damping damper and operating the damping damper,
By constructing the frame to which the damping damper is to be incorporated into a three-way frame shape with two pillars on both sides and one beam constructed only between either the upper part or the lower part between the pillars. , Ensuring a damper space for installing the damping damper between the upper part or the lower part between the pillars,
The damping damper is installed in the damper space, and one end of the damping damper is connected to the joint portion of the frame frame via the displacement transmission mechanism, and the other end of the damping damper is connected A vibration damping structure characterized by being connected to a joint portion in another frame adjacent to the frame. The vibration damping structure according to claim 1,
The displacement transmission mechanism includes a brace that forms a V shape or an inverted V shape, and a central bracket that is joined to a vertex that is a lower portion or an upper portion of the brace,
The upper or lower part of the brace in the displacement transmission mechanism is connected to the upper or lower joint part of the frame frame, and the central bracket is secured to the center of the damper space secured at the lower or upper part of the frame frame. Placed in the
In the damper space, two damping dampers are installed on both sides of the central bracket, and one end of each damping damper is connected to the central bracket, and each damping damper A vibration damping structure, wherein the other end of each is connected to a joint portion of another frame adjacent to the frame through a bracket. A vibration damping structure according to claim 1 or 2,
A vibration damping structure comprising a small beam for supporting a slab on each side of the damper space.

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