JP3916213B2 - Damping method and device using rocking curtain wall - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a building vibration control method and a vibration control device that is implemented by using a rocking type curtain wall mounting means that has been increasing in recent years.
[0002]
[Prior art]
As a means for reducing the shaking of the building against strong winds and earthquakes, a technique of installing a damper between the layers of the building is known, and in recent years, it has been widely implemented especially in steel-framed high-rise buildings. For example, FIGS. 6 and 7 show an embodiment in which an oil damper 4 is combined with a brace 3 incorporated in a plane of a column beam frame formed by columns 1 and beams 2. FIG. 8 shows an example in which a viscoelastic damper 6 using a wall 5 is incorporated in the plane of a column beam frame. A wide variety of other dampers such as viscous dampers and steel dampers are also used.
[0003]
As illustrated in FIGS. 6, 7, and 8, when installing a damper between layers of a building, it is necessary to rigidly transmit the interlayer deformation to the damper and rigidly transmit the damping force of the damper to the layer. There is. For this reason, a transmission mechanism such as a rigid brace 3 and a wall 5 is necessary. For this reason, the transmission mechanism not only causes an increase in cost, but is also a very large constraint in the layout plan for building design.
[0004]
On the other hand, an invention in which a damper is installed using an existing curtain wall is also known. For example,
(1) “Viscosity damping device built-in curtain wall” disclosed in Japanese Utility Model Publication No. 4-11093 is provided with a damping wall along the inside of the curtain wall, and is attenuated between the wall and the curtain wall. This is a configuration in which a viscous material is filled and sealed. When an interlayer deformation occurs in a building due to an earthquake, a displacement occurs between the curtain wall and the damping wall body, and a resistance corresponding to the relative movement speed of the displacement occurs in the viscous body interposed there, and the damping action works. . The present invention is a technique that is applied to a so-called sway type curtain wall in which the curtain wall moves horizontally, and is difficult to apply to a rocking type curtain wall, and is a technique that is less effective even if applied temporarily. is there.
[0005]
(2) The “steel frame ramen structure damping device” disclosed in Japanese Patent Application Laid-Open No. 11-293811 is an invention for improving the vibration characteristics of a building using a so-called rocking curtain wall. When the curtain wall is mounted in a rotatable state with respect to the frame of the ramen structure, the curtain wall is prevented from rotating between the curtain wall and the frame against small shaking of the frame due to horizontal force. However, an elastic body such as a coil spring or rubber that extends or contracts to allow rotation of the curtain wall is provided for a greater swing than that. This invention suppresses the floating (rotation) of the curtain wall with respect to a small amplitude by the precompression force of the elastic body, and adds the rigidity of the curtain wall to the rigidity of the building frame. In other words, it is only for the purpose of adding rigidity, and since there is no damping function, an effective seismic control action cannot be expected. Further, since the movement of the curtain wall is suppressed at a small amplitude, even if an attenuation device is added, the attenuation function does not work and no effect is obtained.
[0006]
(3) The “dynamic vibration absorber using curtain wall” disclosed in Japanese Patent Publication No. 8-6502 constitutes a mass damper (dynamic vibration absorber) using the mass of the curtain wall. As a fastener that slidably supports the curtain wall on the wall surface of the building so as to follow the inter-layer deformation, an elastic-plastic damper (L-shaped support metal fitting) having a cross-sectional defect portion to enhance the deformability is used. The elasto-plastic damper is designed to have a stiffness and a damping amount corresponding to the natural frequency of the building, thereby constituting a dynamic vibration absorber with a curtain wall as a weight. Therefore, the curtain wall is configured to vibrate freely according to the vibration of the building.
[0007]
(4) As described above, there is currently no effective damping method or damping device using a curtain wall for a rocking curtain wall.
[0008]
[Problems to be solved by the present invention]
An object of the present invention is to provide an effective vibration control method and vibration control apparatus using a rocking curtain wall.
[0009]
A further object of the present invention is to provide a damping method and a control method using a rocking curtain wall in which the damping device functions effectively and exhibits a damping effect against a wide range of vibrations from a small amplitude to a large amplitude of the curtain wall due to an earthquake. To provide a seismic device.
[0010]
A further object of the present invention is to provide a rocking-type curtain wall-use vibration control method and vibration control system that realizes a compact vibration control mechanism by imparting an elastic function or a damping function to the support member (support means) of the curtain wall. Is to provide a device.
[0011]
As a means for solving the above-mentioned problems of the prior art, a seismic control method using a rocking curtain wall according to the invention of claim 1 is as follows:
The left and right sides supporting the lower part of the curtain wall 10 to the lower beam 2 so that the curtain wall 10 rocks and rotates in the in-plane direction around one virtual rotation center P due to the interlayer deformation that occurs in the building due to an earthquake or the like. The two support means are arranged such that the normal R passes through the virtual rotation center P,
Is freely supported by the same curtain wall 10 vertically fasteners for supporting the upper part of the curtain wall 10 to the beam 2 of the upper,
The left and right support means for supporting the lower part of the curtain wall 10 to the lower beam 2 have a damping function so that a damping force is generated when the curtain wall 10 is rotated.
[0012]
The invention described in claim 2 is the vibration control method using the rocking curtain wall according to claim 1,
Different from another and curtain wall lower portion of the support means, characterized in that in combination with established oil damper 18 between the bottom and the lower beam 2 of the curtain wall 10.
[0013]
The vibration control method using the rocking curtain wall according to the invention described in claim 3 is:
The position of the virtual rotation center P at the lower center of the curtain wall 10 is set so that the curtain wall 10 rotates in the in-plane direction around one virtual rotation center P as a result of interlayer deformation occurring in the building due to an earthquake or the like. It is supported on the lower beam 2 by a hinge structure with pins 22,
The curtain wall 10 is freely supported in the vertical direction by a fastener that supports the upper part of the perpendicular line passing through the virtual rotation center P of the curtain wall 10 to the upper beam 2;
A viscoelastic damper 21 that generates a damping force during rocking rotation of the curtain wall 10 is installed at two left and right positions where the pin 22 that supports the lower part of the curtain wall 10 to the lower beam 2 is point-symmetric. And
[0014]
A seismic control device using a rocking curtain wall according to the invention described in claim 4,
As the curtain wall 10 with the interlayer deformation occurring in the building by earthquake or locking the rotation in the plane direction around one of the virtual rotation center P, a support for supporting the bottom of the curtain wall 10 to the lower beam 2 Two high-damping rubber devices 11 as means are installed on the left and right in the arrangement in which the normal R passes through the virtual rotation center P,
The fastener that supports the upper portion of the curtain wall 10 to the upper beam 2 is configured such that the pin or bolt 12 is passed through the loose hole 14 of the support hardware 13, and the curtain wall 10 is freely supported in the vertical direction.
And characterized in that the seismic restraint is generated a damping force during the locking Rotation of the curtain wall 10 by the attenuation function of the two right and left of the high damping rubber 11 for supporting a lower portion of the curtain wall 10 to the lower beam 2 To do.
[0015]
According to a fifth aspect of the present invention, there is provided a vibration control device using a rocking curtain wall according to the fourth aspect,
The two left and right supporting means for supporting the lower part of the curtain wall 10 on the lower beam 2 are sliding bearings 16 .
[0016]
A seismic control device using a rocking curtain wall according to the invention described in claim 6,
The position of the virtual rotation center P in the lower center of the curtain wall 10 is such that the curtain wall 10 rocks and rotates in the in-plane direction around one virtual rotation center P due to interlayer deformation occurring in the building due to an earthquake or the like. It is supported by the lower beam 2 with a hinge structure with pins 22;
The fastener for supporting the upper portion of the curtain wall 10 on the vertical line passing through the virtual rotation center P to the upper beam 2 is configured such that a pin or bolt 12 is passed through the loose hole 14 of the support hardware 13. Is freely supported in the vertical direction,
Viscoelastic dampers 21 that generate a damping force during the rocking rotation of the curtain wall 10 are installed at two left and right positions where the pins 22 that support the lower part of the curtain wall 10 on the lower beam 2 are point-symmetric. It is characterized by that.
[0017]
The invention described in claim 7 is the seismic control apparatus using the rocking curtain wall according to claim 4 or 6,
The fastener that supports the upper part of the curtain wall 10 to the upper beam 2 has one end fixed to the column 1 and the other end fixed to the upper part of the curtain wall 10 and arranged in the horizontal direction. The structure includes a flat steel plate 15 having high rigidity and low vertical rigidity .
[0018]
DETAILED DESCRIPTION OF THE INVENTION
A rocking-system curtain wall-use seismic control device according to claims 4 to 7 that implements a rocking-type curtain wall-use seismic control method according to the invention described in claims 1-3. This will be described based on the embodiment shown in FIGS.
[0019]
The gist of the present invention is that the curtain wall 10 is supported so as to perform rocking rotation in the in-plane direction around one virtual rotation center P due to interlayer deformation occurring in the building due to an earthquake or the like, and the rocking rotation generated at this time is supported. It is to install a damping device in a configuration and / or arrangement that generates a damping force during deformation.
[0020]
First, in the embodiment shown in FIGS. 1A and 1B, the high-damping rubber device 11 is configured such that the left and right two support means for supporting the curtain wall 10 to the lower beam 2 are arranged such that the normal line R passes through the virtual rotation center P. It consists of The fastener that supports the upper portion of the curtain wall 10 is a loose hole 14 of a support hardware 13 in which a bolt (or pin) 12 positioned on a vertical line Q passing through the virtual rotation center P is fixed to the upper beam 2. It is set as the structure fastened by the structure which is passed in and withstands the external force of an out-of-plane direction.
[0021]
Therefore, when a building subjected to a horizontal force at the time of an earthquake causes interlayer deformation, the curtain wall 10 causes shear deformation of the high damping rubber device 11 and the bolt 12 moves in the loose hole 14 as illustrated in FIG. Depending on the flexibility, rocking rotation is performed in the in-plane direction around the virtual rotation center P.
[0022]
As a result, the high-damping rubber device 11 generates a damping force due to obvious deformation when comparing FIGS. 1a and b. That is, the rubber of the high damping rubber device 11 has a thickness of about 1 cm to 3 cm, and the shear rigidity is extremely small compared to the compression rigidity. For this reason, when an external force is applied, it has a property of easily deforming in the shearing direction and generates a shearing deformation around the virtual rotation center P with a good responsiveness and exhibits a damping action. Moreover, as a characteristic of the high-damping rubber device 11, after the deformation as described above, a restoring force for returning the curtain wall 10 to the original position also works.
[0023]
Here, the difference between the rocking rotation of the curtain wall 10 realized by the above configuration according to the present invention and the rocking operation of the curtain wall that has conventionally occurred in accordance with the interlayer deformation of the building will be described.
[0024]
The rocking rotation operation of the conventional type is supported at only one place 31 or 32 of the two support points 31 and 32 of the curtain wall 10 as shown in the conceptual diagram at the time of large amplitude in FIGS. It is a mode in which rocking rotation is performed with this support point as the rotation center, and the other support points are lifted. Therefore, shocking vibration and noise are generated when the lifted support point returns to the original position. In addition, especially at small amplitudes where comfort is a problem, the weight of the curtain wall 10 acts as it is and does not cause displacement, so even if a damper is installed, the damping effect on the building structure can be almost expected. There is no.
[0025]
On the other hand, in the case of the embodiment of FIG. 1 of the present invention, for example, the curtain wall 10 is supported very easily (softly) by the elasticity of the high-damping rubber device 11, so that the response is good even at a small amplitude. Rocking rotation about the virtual rotation center P is performed. Therefore, the damping effect of the damper works effectively.
[0026]
As a fastener which supports the upper part of the curtain wall 10, it is not restricted to only 1 structure like FIG. Although illustration is omitted, the curtain wall 10 can be implemented by using flexible fasteners at the upper two corners or at the upper and lower four corners with the same configuration as in FIG.
[0027]
Alternatively, as another fastener, as in the embodiment shown in FIGS. 2a and 2b, the left end of the flat steel plate 15 having an appropriate width dimension in the direction perpendicular to the paper surface so as to sufficiently exert the supporting force in the out-of-plane direction. It is also possible to use a fastener having a structure in which the right end is fixed to the column 1 and the right end is fixed to the curtain wall 10.
[0028]
The flat steel plate 15 has a large rigidity in the out-of-plane direction and the horizontal direction, but has a low rigidity in the vertical direction. Therefore, with interlayer deformation due to an earthquake or the like, the curtain wall 10 is supported so as to be rocked and rotated in the in-plane direction around one virtual rotation center P, and a restraining effect in the out-of-plane direction can be expected. When a plurality of flat steel plates 15 are installed as fasteners, they are installed in a direction perpendicular to the normal line so that the rigidity in the normal line direction connecting to the virtual rotation center P is low.
[0029]
Next, FIGS. 3A and 3B show an embodiment in which a pair of left and right sliding bearings 16 is used as a means for supporting the curtain wall 10 and a damping device.
[0030]
The sliding member 16a constituting the sliding bearing 16 has a small friction coefficient, and is fixed to the lower base 16b. On the other hand, the mount 16c on the curtain wall 10 side slides on the sliding material 16a, and the vibration energy is absorbed by the friction force at that time to exhibit a damping action.
[0031]
No restoring force is generated in the sliding bearing 16 configured as described above. However, since a restoring force for restoring the building structure itself to the original shape is generated, the curtain wall 10 is also restored to the original position.
[0032]
When the sliding bearing 16 as shown in FIG. 3 is implemented, it is more preferable that the sliding surface is an arc surface centered on the virtual rotation center P in order to realize smoother sliding.
[0033]
3, the means for supporting the upper portion of the curtain wall 10 is substantially the same as the embodiment of FIG. 1, but the pins 12 attached to the upper portion of the curtain wall 10 are parallel to the beam 2 perpendicularly. The left and right guide plates 17 and 17 fixed to the inside of the loose hole 14 are formed so as to be movable.
[0034]
Although the embodiment in which the support means of the curtain wall 10 is combined so as to serve as an attenuation device has been described above, this is not restrictive. It is also possible to implement the support means and the damping device in different independent configurations or in combination configurations.
[0035]
FIG. 4 shows an embodiment in which the damping effect is enhanced by using an oil damper 18 in addition to the sliding bearing 16 shown in FIG.
[0036]
The oil damper 18 is arranged in a so-called tangential direction perpendicular to the straight line Q passing through the virtual rotation center P, and a rotatable joint is used at each of the connection point 19 with the curtain wall 10 and the connection point 20 with the beam 2. Has been.
[0037]
Therefore, when a horizontal force due to an earthquake or the like is applied, there is no problem for the curtain wall 10 to rock and rotate in the in-plane direction around the virtual rotation center P. The oil damper 18 effectively exhibits a damping force by utilizing the deformation of the rocking rotation.
[0038]
FIGS. 5a and 5b show an embodiment in which the support means and the damping device of the curtain wall 10 are functionally differentiated and made independent more clearly. The support means of the curtain wall 10 employs a mechanical pin structure, and a viscoelastic damper 21 is used as a damping device.
[0039]
In other words, the lower portion of the curtain wall 10 is supported by a hinge structure so that the pin 22 serving as the center of rotation of the rocking rotation exhibits a rigidity that can withstand an out-of-plane force by superimposing the bracket on the curtain wall side and the beam side bracket. It is set as the conclusion. As in the embodiment of FIG. 3, the upper support is formed by left and right guide plates 17, 17 fixed vertically to the beam 2 by pins 12 attached to the upper portion of the curtain wall 10 on the vertical line passing through the rotation center. The interior of the loose hole 14 is movable.
[0040]
A pair of viscoelastic dampers 21 are installed in an arrangement in which the pin 22 at the rotation center is point-symmetric. That is, the fixed arms 21b fixed to the beam 2 are arranged at equal intervals on both sides of the movable arm 21a protruding from the curtain wall 10, and the viscoelastic body 21c is disposed between the fixed arm 21b and the movable arm 21a. It is the installed configuration.
[0041]
Therefore, the curtain wall 10 easily rocks and rotates in the in-plane direction around the pin 22 as shown in FIG. 5b due to the interlayer deformation of the building due to an earthquake or the like. At that time, the viscoelastic body absorbs the energy and reduces the damping force. Demonstrate.
[0042]
[Effects of the present invention]
A seismic control method using the rocking curtain wall according to the invention described in claims 1 to 3 and a seismic control device using the rocking curtain wall according to the invention described in claims 4 to 7 are earthquakes, etc. Responsive to the rocking rotation of the curtain wall due to, the damping device functions effectively for a wide range of vibrations from small to large amplitudes and exhibits a damping effect. Moreover, since the support point never lifts, shocking vibration and noise are not generated when restoring the original position.
[0043]
Since the seismic control method and the seismic control device using the curtain wall according to the present invention are configured to use the rocking rotation of the curtain wall, they do not hinder the floor plan in building design unlike other ordinary seismic control devices. Can be widely implemented.
[Brief description of the drawings]
1A and 1B are elevational views conceptually showing a first embodiment of a vibration control device according to the present invention when stationary and when deformed. FIG.
FIGS. 2a and 2b are elevational views conceptually showing a second embodiment of a vibration control device according to the present invention when stationary and when deformed. FIG.
FIGS. 3A and 3B are elevational views conceptually showing a third embodiment of the vibration control device according to the present invention when stationary and when deformed. FIG.
FIG. 4 is an elevation view conceptually showing a stationary state of a fourth embodiment of the vibration control device according to the present invention.
FIGS. 5a and 5b are elevational views conceptually showing a fifth embodiment of the vibration control device according to the present invention when stationary and when deformed.
FIG. 6 is an elevation view showing an example of a combination of a conventional brace and a damper.
FIG. 7 is an elevational view showing another example of a combination of a conventional brace and a damper.
FIG. 8 is an elevation view showing an example of a combination of a conventional wall and a damper.
FIGS. 9A to 9C are diagrams conceptually illustrating a rocking rotation at the time of a large amplitude of a conventional curtain wall.
[Explanation of symbols]
10 Curtain wall P Virtual rotation center 11 Damping device (high damping rubber device)
16 Sliding bearing 18 Oil damper 21 Viscoelastic damper 12 Support point

Claims (7)

Left and right 2 supporting the lower part of the curtain wall to the lower beam so that the curtain wall rocks and rotates in the in-plane direction around one virtual rotation center (P) due to interlayer deformation occurring in the building due to an earthquake or the like Each support means has a normal line (R) passing through the virtual rotation center (P),
Is freely supported by the same curtain wall in the vertical direction in the fastener which supports the upper part of the curtain wall to the beam of the upper,
The use of a locking curtain wall is characterized in that a damping function is generated when the curtain wall is rotated by providing damping functions to the left and right support means for supporting the lower part of the curtain wall to the lower beam. Earthquake method.   2. Use of a rocking curtain wall according to claim 1, wherein an oil damper is installed between the lower part of the curtain wall and the lower beam, in combination with the support means at the lower part of the curtain wall. Vibration control method. As the curtain wall rocks and rotates in the in-plane direction around one virtual rotation center (P) with the interlayer deformation that occurs in the building due to an earthquake, etc., the virtual rotation center (P) at the lower center of the curtain wall The position is supported by the lower beam with a hinge structure with pins,
The curtain wall is freely supported in the vertical direction by a fastener that supports the upper part of the vertical line passing through the virtual rotation center (P) of the curtain wall to the upper beam,
A rocking system characterized in that viscoelastic dampers that generate a damping force during rocking rotation of the curtain wall are installed at two left and right positions where the pin supporting the lower part of the curtain wall to the lower beam is point-symmetric. Control method of curtain wall use. Support means for supporting the lower part of the curtain wall to the lower beam so that the curtain wall rocks and rotates in the in-plane direction around one virtual rotation center (P) due to interlayer deformation occurring in the building due to an earthquake or the like Two high-damping rubber devices are installed on the left and right in the arrangement in which the normal line (R) passes through the virtual rotation center (P),
The fastener that supports the upper part of the curtain wall to the upper beam is a structure in which the pin or bolt is passed through the loose hole of the support hardware, and the curtain wall is freely supported in the vertical direction,
A rocking-type curtain characterized in that a damping force is generated by the damping function of the curtain wall by the damping function of the two left and right high damping rubber devices that support the lower part of the curtain wall on the lower beam. Wall-based vibration control device.   The rocking-type curtain wall-use vibration control device according to claim 4, wherein the two left and right support means for supporting the lower part of the curtain wall on the lower beam are sliding bearings. As the curtain wall rocks and rotates in the in-plane direction around one virtual rotation center (P) with the interlayer deformation that occurs in the building due to an earthquake, etc., the virtual rotation center (P) at the lower center of the curtain wall The position is supported by the lower beam in a hinge structure with pins,
The fastener that supports the upper part of the vertical line passing through the virtual rotation center (P) of the curtain wall to the upper beam has a configuration in which the pin or bolt is passed through the loose hole of the support hardware so that the curtain wall is in the vertical direction. Is freely supported,
Viscoelastic dampers that generate damping force during the rocking rotation of the curtain wall are installed at two left and right positions with the pin supporting the lower part of the curtain wall supported by the lower beam as point symmetry. Seismic control device using a rocking curtain wall.   Fasteners that support the upper part of the curtain wall to the upper beam are fixed to one column at the other end and fixed to the upper part of the curtain wall in the horizontal direction. The rocking-system curtain wall-use vibration control device according to claim 4 or 6, characterized in that it comprises a flat steel plate having a low vertical rigidity.

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