JP5586566B2 - Damping structure - Google Patents

Description

  The present invention relates to a vibration control structure including a plurality of structures having different heights and rigidity.

  In recent years, when a historic building is rebuilt, a new building is often inherited in its historical appearance. For example, this corresponds to a method of reproducing a building having almost the same appearance as an existing building by a modern construction method. In this case, there are many cases where a high-rise building is extended adjacent to the reproduced building.

  Here, since a historical building is a medium- and low-rise building, the natural period differs greatly from a high-rise building. For this reason, when a high-rise building is adjacent to a reconstructed building that reproduces a historical building, it is desired to perform vibration control of the entire building in consideration of the difference in natural period. Currently, as such a vibration control method, there is known a method in which a vibration control device is installed between structures and the vibration energy of the structure is stored and consumed in another structure to reduce the vibration of a plurality of structures. (For example, Patent Document 1).

JP 2001-123696 A

  However, in the above-mentioned seismic control method, there is a problem that vibration between structures cannot be sufficiently controlled when the upper floor of a high-rise building has a shape that extends horizontally and covers the reconstructed building. .

  In addition, because the structure type and the structure form of a normal reproduction building and a high-rise building are different, when a reproduction building and a high-rise building covering it are integrated, a plane due to the difference in seismic force sharing in the horizontal plane during an earthquake There is a risk of damage concentration due to mechanical torsion and a difference in rigidity in the height direction.

  An object of the present invention is to provide a vibration control structure capable of controlling a planar torsion of a structure and a rigidity difference in a height direction.

The seismic control structure of the present invention is a reproduction structure having almost the same appearance as a historical building demolished at the time of rebuilding, and is added adjacent to the reproduction structure, and is higher than the reproduction structure. and the vibration control structure and a rigidity is small high-rise structure, the high-rise structure, at least in part on the overlying overhang portion of the reproduction structure projecting in the horizontal direction in the upper floors, the reproduction The structure includes a horizontal support that supports a downstairs portion of the overhang portion in a vertical direction and follows a horizontal displacement between the overhang portion, and the horizontal support is a roof of the reproduction structure. Or, on the roof, a plurality of the reconstructed structures are installed along the longitudinal direction .

Further, vibration control structure of the present invention, a coupling damper between said reproduction structure and the high-rise structures connected in the horizontal direction, and controls the vibration between said reproduction structure and the high-rise structure It is characterized by providing.

Moreover, the seismic control structure of the present invention is characterized in that the horizontal support is installed in a plurality of rows along the longitudinal direction of the reproduction structure.

  Moreover, the seismic control structure of the present invention is characterized in that the horizontal bearing is a seismic isolation device.

  According to the vibration control structure of the present invention, the planar torsion of the structure and the rigidity difference in the height direction can be controlled.

It is the figure which looked at the damping structure which concerns on embodiment from the side surface. It is a figure which shows the structure of the plane of the damping structure which concerns on embodiment. It is a figure which shows the attachment state of the seismic isolation apparatus installed in the roof part of the reproduction structure in the seismic control structure which concerns on embodiment, and the deformation | transformation state at the time of an earthquake. It is a figure which shows the deformation | transformation state of the plane at the time of the earthquake of the damping structure which concerns on embodiment. It is a figure which shows the attachment state of the seismic isolation apparatus and high-rise structure which were installed in the roof part of the reproduction structure in the damping structure which concerns on embodiment. It is a figure which shows the seismic isolation apparatus installed in the roof part of the reproduction structure in the damping structure which concerns on embodiment.

  Hereinafter, a vibration control structure according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a vibration control structure according to an embodiment. In the following description, an XYZ orthogonal coordinate system is set, and description will be made with reference to this XYZ orthogonal coordinate system. As shown in FIG. 1, the XYZ orthogonal coordinate system is set such that the X axis is parallel to the horizontal direction of the paper surface, the Y axis is parallel to the depth direction of the paper surface, and the Z axis is parallel to the vertical direction of the paper surface.

  The vibration control structure 2 includes a reproduction structure 4 having almost the same appearance as a historical building demolished at the time of rebuilding, and a high-rise structure 6 extended at a location adjacent to the reproduction structure 4. Here, the high-rise structure 6 has an inverted L-shape having an overhanging portion 8 projecting greatly on the −X side on the upper floor, and the downstairs portion 10 of the overhanging portion 8 is the reproduction structure 4. A portion of the rooftop portion 13 is covered. In addition, the vibration control structure 2 has a structure in which the rigidity of the reproduction structure 4 is extremely large compared to the rigidity of the high-rise structure 6. For example, the reproduction structure 4 is a steel reinforced concrete structure or a high-rise structure. 6 is composed of a steel structure.

  In addition, in the clearance 11 between the reproduction structure 4 and the high-rise structure 6, a connecting damper 12 that connects both adjacent structures in the X-axis direction and absorbs vibrations between the structures during an earthquake is provided in both structures. A plurality of beams are provided along the positions of the beams constituting the frame. In addition, a seismic isolation device 14 that bears the load of the overhanging portion 8 and follows the displacement between the overhanging portion 8 and the rooftop portion 13 in the XY plane is horizontally attached to the rooftop portion 13 of the reproduction structure 4. It is provided as a bearing. Moreover, the reproduction structure 4 and the high-rise structure 6 are provided with a vibration control brace 16 for controlling the vibration of each structure in a beam column structure at a predetermined position on each floor. Here, an oil damper that absorbs vibration by contraction and extension motion is used for the connecting damper 12 and the vibration control brace 16, and a laminated rubber bearing in which metal plates and rubber are alternately stacked is used for the seismic isolation device 14. .

  Next, the planar configuration of the vibration control structure 2 will be described with reference to FIG. Fig.2 (a) is a figure which shows the structure of the plane of the upper floor of the damping structure 2 which looked at the A surface shown in FIG. 1 from the + Z side. On the upper floor, the vibration control structure 2 is composed of only the high-rise structure 6, and the high-rise structure 6 includes a vibration control brace 16 in the beam column frame at a position not hitting the overhanging portion 8.

  FIG. 2B is a diagram illustrating a planar configuration of the vibration control structure 2 when the surface B illustrated in FIG. 1 is viewed from the + Z side. In this plane, a plurality of connecting dampers 12 are installed in the clearance 11 along the positions of the beams constituting the frame of both structures. A plurality of seismic isolation devices 14 are installed in the Y-axis direction along the edge 18 (see FIG. 2A) of the downstairs portion 10 on the rooftop portion 13 of the reproduction structure 4. The high-rise structure 6 includes a vibration control brace 16 at a position corresponding to the position of the vibration control brace 16 on the upper floor, and the reproduction structure 4 has the vibration control brace 16 in the beam column frame located on the facade 19 side. It has.

  FIG.2 (c) is a figure which shows the structure of the plane of the lower floor of the damping structure 2 which looked at the C surface shown in FIG. 1 from the + Z side. The lower floor of the vibration control structure 2 is composed of a reproduction structure 4 and a high-rise structure 6, and a clearance 11 is provided between both structures. The high-rise structure 6 includes a vibration control brace 16 at a position corresponding to the position of the vibration control brace 16 on the upper floor, and the reproduction structure 4 includes a vibration control brace 16 on the facade 19 side.

  Next, the seismic isolation device 14 installed on the rooftop portion 13 of the reproduction structure 4 will be described with reference to FIG. As shown in FIG. 3A, the roof portion 13 has an upper end portion of the column 20 that constitutes the casing of the reproduction structure 4 protruding, and the seismic isolation device 14 is installed with the upper end portion of the column 20 as a pedestal. ing. Moreover, the pillar 22 of the edge 18 of the overhanging part 8 constituting the frame of the high-rise structure 6 extends in the −Z direction from the downstairs part 10, and the lower end of the pillar 22 is joined to the upper end of the seismic isolation device 14. Has been. For this reason, the load of the overhang portion 8 is transmitted from the column 22 to the column 20 via the seismic isolation device 14, and the overhang portion 8 is always supported in the Z-axis direction by the reproduction structure 4.

  Since the seismic isolation device 14 is a laminated rubber bearing, as shown in FIG. 3B, it is possible to shear and deform following the movement of the upper end of the column 20 and the lower end of the column 22 during an earthquake. It is.

  FIG. 4 is a diagram illustrating a deformation state of the vibration control structure 2 according to the embodiment at the time of the earthquake. As shown in FIG. 4A, the reconstructed structure 4 and the high-rise structure 6 vibrate based on their vibration characteristics during an earthquake and show different behaviors. For example, the reproduction structure 4 having a high rigidity in the middle and low layers vibrates small because the natural period is small, whereas the high structure 6 having a low rigidity in the high layer vibrates greatly because of the large natural period. In this case, the seismic isolation device 14 is shear-deformed in the horizontal direction (see FIG. 3B), thereby following the displacement between the downstairs portion 10 of the overhang portion 8 and the reproduction structure 4 in the XY plane. To do. Further, when the connecting damper 12 contracts and extends, vibration in the X-axis direction generated between the structures is absorbed. Moreover, the vibration of the reproduction structure 4 and the high-rise structure 6 is absorbed by the vibration control brace 16 contracting and extending.

  In addition, if the reproduction structure 4 and the high-rise structure 6 are structurally integrated, the vibration control structure 2 vibrates as a single structure as shown in FIG. 4B during an earthquake. In this case, the rigid center of the vibration control structure 2 is greatly biased toward the reproduction structure 4 having a large rigidity, and is largely separated from the center of gravity of the vibration control structure 2, so that a large twist is generated in the XY plane particularly in the lower floor. In addition, since a large rigidity difference is generated between the downstairs portion 10 of the overhang portion 8 and the reproduction structure 4, damage may concentrate on the damping structure 2 in this portion.

  According to the vibration control structure 2 according to this embodiment, the overhanging portion 8 and the roof portion of the high-rise structure 6 in the XY plane are provided by installing the seismic isolation device 14 on the roof portion 13 of the reproduction structure 4. 13 can be allowed to be displaced, so that the planar torsion of the structure and the rigidity difference in the height direction can be controlled as compared with a single structure that is not separated.

  Further, by installing a connecting damper 12 between the reconstructed structure 4 and the high-rise structure 6 having different natural periods, the response control of the entire seismic control structure 2 using the response between the structures having different natural periods. Can be achieved. Moreover, the vibration control effect can be further enhanced by installing the vibration control braces 16 on the reproduction structure 4 and the high-rise structure 6, respectively.

  Further, the volume ratio of the damping structure 2 is obtained by making the shape of the damping structure 2 such that the downstairs portion 10 of the overhanging portion 8 of the high-rise structure 6 covers a part of the roof of the reproduction structure 4. (Total building area relative to site area) can be increased. Moreover, since the damping structure 2 is comprised from the reproduction structure 4 and the high-rise structure 6, structure calculation can be performed for every structure in a structure design process.

  In the above-described embodiment, the installation pattern of the seismic isolation device 14 is the above-described example if the seismic isolation device 14 can follow the displacement between the downstairs portion 10 of the overhanging portion 8 and the reproduction structure 4. It is not limited to. For example, the seismic isolation device 14 may be installed along a column on the + X side with respect to the edge 18 of the downstairs portion 10, or may be installed in a plurality of rows in the Y-axis direction. Further, it may be installed only at a position near the center of the reproduction structure 4 without being installed at the + Y side end and the −Y side end.

  Further, in the above-described embodiment, if the reproduction structure 4 can always support the overhanging portion 8 in the Z-axis direction, the seismic isolation device 14 is the column 20 of the reproduction structure 4 (see FIG. 3A). It does not have to be installed on top. For example, as shown in FIG. 5A and FIG. 5B, it may be installed on the beam 24 constituting the housing of the reproduction structure 4. Further, as shown in FIG. 5C, the seismic isolation device 14 may be installed between the beam 26 of the downstairs portion 10 of the overhang portion 8 and the beam 24 of the reproduction structure 4.

  Further, in the above-described embodiment, the seismic isolation device 14 is not limited to the laminated rubber bearing. For example, as shown in FIG. 6, a sliding bearing in which a sliding material 30 is provided under the laminated rubber 28 may be used for the seismic isolation device 14. Thereby, even when the displacement between the reproduction structure 4 and the high-rise structure 6 becomes extremely large at the time of the earthquake, the downstairs portion 10 of the overhanging portion 8 can be supported in the vertical direction. The seismic isolation device 14 may be a lead plug insertion type laminated rubber bearing, a linear motion rolling bearing, a roller bearing, an elastic sliding bearing, or the like.

  In the above-described embodiment, the connecting damper 12 is not limited to an oil damper, and a viscoelastic damper, a friction damper, or the like may be used.

  Moreover, in the above-mentioned embodiment, although the reproduction structure 4 and the high-rise structure 6 are equipped with the vibration control brace 16, you may make it replace with the vibration control brace 16 and provide an earthquake resistant brace.

  In the above-described embodiment, the case where the reproduction structure 4 is a steel reinforced concrete structure and the high-rise structure 6 is a steel structure is described as an example. However, the rigidity of the reproduction structure 4 is higher than the rigidity of the high-rise structure 6. The structure type and the structure type of the reconstructed structure 4 and the high-rise structure 6 are not limited as long as the structure becomes higher.

  Moreover, in the above-mentioned embodiment, although the case where the vibration of the damping structure 2 was controlled at the time of an earthquake was described as an example, the reproduction structure 4 and the high-rise structure 6 showed different behaviors at the time of strong wind. Even in the case, the seismic isolation device 14 follows the displacement between the downstairs portion 10 of the overhanging portion 8 and the reproduction structure 4 that occurs in the XY plane, so that the planar torsion and height direction of the structure can be improved. The stiffness difference can be controlled.

  In the above-described embodiment, the vibration control structure 2 includes the plurality of reproduction structures 4, and the downstairs portion 10 of the overhanging portion 8 covers a part of the rooftop portion 13 of the plurality of reproduction structures 4. May be. Even in this case, by installing the seismic isolation device 14 on the rooftop portion 13 of each reproduction structure 4, the planar torsion of the structure and the rigidity difference in the height direction can be controlled.

  In the above-described embodiment, the case where the downstairs portion 10 of the overhanging portion 8 covers a part of the rooftop portion 13 of the reproduction structure 4 has been described as an example. 13 may be entirely covered.

  In the above-described embodiment, the case where the reproduction structure 4 has the rooftop portion 13 has been described as an example. However, the reproduction structure 4 has a roof, and the seismic isolation device 14 is installed on the roof. May be.

  2 ... Damping structure, 4 ... Reproduction structure, 6 ... High-rise structure, 8 ... Overhang part, 10 ... Downstairs part, 11 ... Clearance, 12 ... Connection damper, 13 ... Rooftop part, 14 ... Seismic isolation member, 16 ... Damping brace

Claims (4)

A reproduction structure with almost the same appearance as a historical building demolished at the time of rebuilding,
A high-rise structure that is extended adjacent to the reproduction structure, is higher in height than the reproduction structure, and has low rigidity.
In the vibration control structure with
The high-rise structure has a projecting portion that projects in the horizontal direction on the upper floor and covers at least a part of the reproduction structure,
The reproduction structure includes a horizontal support that supports a downstairs portion of the overhang portion in a vertical direction and follows a horizontal displacement between the overhang portion ,
A plurality of the horizontal supports are installed along the longitudinal direction of the reproduction structure on the roof or roof of the reproduction structure . Coupled between said reproduction structure and the high-rise structure in the horizontal direction, according to claim 1, further comprising a coupling damper for controlling the vibration between said reproduction structure and the high-rise structure Damping structure. The said horizontal support is installed in multiple rows along the longitudinal direction of the said reproduction structure, The damping structure of Claim 1 or 2 characterized by the above-mentioned. The said horizontal bearing is a seismic isolation apparatus, The damping structure as described in any one of Claims 1-3 characterized by the above-mentioned.

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