JP2015200123A - Vibration control building and building vibration control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control technique enabling a vibration control effect to be efficiently exerted while curbing increases in complex design, constraints and a foundation size.SOLUTION: A vibration control building 10 comprises: a building 20 as a vibration control object; an external structure 30 which is arranged along a periphery 20A of the building 20, with an upper section thereof fixed to the building 20 and a lower end thereof separated from a foundation 1 of the building 20 in a manner that prevents a foundation 1 of the building 20 from direct input of earthquake force, and has rigidity higher than the building 20; and vibration control dampers 40 connecting the building 20 and the external structure 30 on a plurality of levels so that respective vibration control dampers 40 deform in accordance with relative displacements therebetween to absorb vibration energy of the building 20.

Description

  The present invention relates to a vibration control building and a vibration control method for a building.

  A damping structure in which a plurality of buildings having different natural periods are connected by a damping damper is known (see, for example, Patent Document 1). In this vibration control building, when seismic force is input to multiple buildings, the vibration control damper deforms and absorbs vibration energy due to the difference in deformation between buildings due to the difference in the deformation mode of the building. .

JP 2013-47458 A

  In the above-described vibration control building, not only the ratio of the natural period between the buildings but also the weight ratio (mass ratio) between the buildings and the weight of each building have a great influence on the vibration control effect. Therefore, setting of the weight of each building is important in the vibration-damping building, which complicates design and increases design constraints. In addition, since the seismic force is directly input to all of the buildings, a foundation that supports the load and bears the horizontal force during the earthquake is required for all of these buildings, and the foundation work becomes large. .

  The present invention has been made in view of the above circumstances, and provides a vibration suppression technique that effectively exhibits a vibration suppression effect while suppressing the complexity of design, the increase in constraints, and the enlargement of the foundation. It is to be an issue.

  The vibration-damping building of the present invention is arranged facing the building to be dampened and the outer periphery of the building, the upper part is fixed to the building, and the lower end is a seismic force against the foundation of the building. The external structure having a higher rigidity than the building and the building and the external structure are connected in a plurality of layers, and the building and the external structure are connected. And a plurality of damping dampers that are deformed in accordance with the relative displacement and absorb the vibration energy of the building.

  In addition, the vibration suppression building of the present invention is arranged to face the vibration suppression target building and the outer periphery of the building, and the upper part is fixed to the building, and has higher rigidity than the building. A plurality of the external structure, the rolling structure or the sliding bearing arranged between the external structure and the foundation of the building or the surrounding ground, and cutting the edges thereof, and the building and the external structure. A plurality of damping dampers coupled in layers and deformed according to relative displacement between the building and the external structure to absorb vibration energy of the building;

  In the vibration control building, the external structure may be configured to surround the entire circumference of the building, and may be fixed to the building on a higher layer side than a central portion in the height direction. The vibration damping damper may be deformed with respect to any horizontal relative displacement generated between the building and the external structure to absorb vibration energy of the building.

  Further, according to the method for damping a building of the present invention, an external structure having higher rigidity than the building to be damped faces the outer periphery of the building, and seismic force is directly input from the foundation of the building. The upper part of the external structure is fixed to the building, the building and the external structure are connected in a plurality of layers by a plurality of vibration dampers, and the vibration dampers are connected to the building. The structure is deformed according to a relative displacement between the building and the external structure, and the vibration dampers absorb the vibration energy of the building.

  Further, in the vibration damping method for a building according to the present invention, an external structure having higher rigidity than the building to be dampened faces the outer periphery of the building, and is placed on the foundation of the building or the surrounding ground. A load is applied via a rolling bearing or a sliding bearing, the upper part of the outer structure is fixed to the building, and the building and the outer structure are formed in a plurality of layers by a plurality of vibration dampers. The plurality of damping dampers are deformed according to the relative displacement between the building and the external structure, and the plurality of damping dampers absorb the vibration energy of the building.

  ADVANTAGE OF THE INVENTION According to this invention, the damping technique which exhibits a damping effect effectively can be provided, suppressing the complexity of a design, the increase in restrictions, and the enlargement of a foundation.

It is an elevational view showing a vibration control building according to one embodiment. It is a top view which shows the vibration suppression building which concerns on one Embodiment. FIG. 3 is a sectional view (an elevated sectional view) taken along a line 3-3 in FIG. 2. FIG. 4 is a sectional view (plan sectional view) taken along the line 4-4 in FIG. It is an elevational sectional view showing an operation of the vibration control building according to one embodiment. It is an elevational view showing a vibration control building according to another embodiment. It is a top view which shows the vibration suppression building which concerns on other embodiment. It is an elevation view which shows the effect | action of the damping building which concerns on other embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is an elevation view showing a vibration control building 10 according to an embodiment, FIG. 2 is a plan view showing the vibration control building 10, and FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 4 is a sectional view (plan sectional view) taken along the line 4-4 in FIG. As shown in these drawings, the vibration control building 10 includes a building 20, an external frame 30, and a plurality of vibration dampers 40 (see FIG. 4) provided therebetween. The building 20 is an existing building such as a steel structure, a reinforced concrete structure, or a steel reinforced concrete structure.

  The external frame 30 includes a brace frame 32 configured in a cylindrical shape so as to surround the entire periphery of the building 20, a plurality of vertical braces 34 and horizontal braces 35 coupled to the upper end of the brace frame 32, and the brace frame 32. A plurality of horizontal braces 36 provided at intervals in the height direction on the circumferential side. The brace frame 32, the vertical brace 34, and the horizontal braces 35 and 36 are frames such as a steel structure, a reinforced concrete structure, a steel reinforced concrete structure, and a concrete-filled steel pipe structure. It is not essential to provide the horizontal brace 35 on the roof, and it may be provided as necessary.

  The brace frame 32 has a configuration in which a plurality of vertical braces 32A are coupled in the circumferential direction, and each vertical brace 32A is provided parallel to the outer periphery 20A of the building 20 and spaced from the outer periphery 20A. Each vertical brace 32 </ b> A extends from the lower floor to the rooftop floor of the building 20, and the lower end of each vertical brace 32 </ b> A is separated from the foundation 1 that supports the building 20.

  The plurality of vertical braces 34 are provided on the roof of the building 20 in a lattice pattern so that each of the vertical braces 34 is perpendicular to the vertical brace 32A, and joins the upper ends of the plurality of vertical braces 32A. Further, the horizontal brace 36 is formed in an annular shape and projects horizontally from the brace frame 32 toward the inner peripheral side. Here, the horizontal brace 36 is provided every several layers of the building 20 and is separated from the outer periphery 20 </ b> A of the building 20.

  A plurality of supports 38 that support the external frame 30 are provided on the roof floor of the building 20. The plurality of supports 38 are rigid foundations such as reinforced concrete blocks and steel frames fixed on the roof of the building 20, between the intersection of the orthogonal vertical braces 34 and the inner periphery of the roof, and vertically It is provided between the brace 34 and the outer periphery of the roof, and the vertical brace 34 is fixed to the plurality of supports 38 by anchors, bolts, or the like. In other words, the uppermost part of the external frame 30 is coupled (that is, fixed and tightly coupled) to the building 20 so as not to be displaced in the horizontal direction on the roof floor of the building 20.

  The vibration dampers 40 are oil dampers (hydraulic dampers), steel dampers, viscoelastic dampers, and the like, and a plurality of damping dampers 40 are arranged in each layer of the building 20. The plurality of damping dampers 40 in each layer are arranged in the space between the horizontal brace 36 and the building 20 and connect them, and are deformed in the horizontal direction according to the relative displacement in the horizontal direction, and thus the building 20. Absorbs the vibration energy. Here, the plurality of damping dampers 40 in each layer are configured to be deformable in accordance with relative displacements in all directions of 360 degrees between the horizontal brace 36 and the building 20. For example, as shown in the figure, when the building 20 has a rectangular parallelepiped shape and the external frame 30 has a rectangular cylindrical shape, a pair of vibration dampers 40 between the corners of the building 20 and the corners of the external frame 30. (Oil damper) is provided, one end of the pair of damping dampers 40 is attached to the corner of the building 20 so as to be rotatable around a vertical axis, and the other end of the pair of damping dampers 40 is orthogonal to the horizontal brace 36. It is attached to the side to rotate.

  Here, the rigidity with respect to the seismic force of the entire external frame 30 is set higher than the rigidity with respect to the seismic force of the entire building 20. As described above, the upper part of the external frame 30 is tightly connected to the building 20 on the roof floor. Furthermore, the lower end of the external frame 30 is cut off from the foundation 1 that supports the building 20, and seismic force is not directly input from the foundation 1 to the external frame 30.

  Therefore, as shown in the sectional elevation view of FIG. 5, when the building 20 is deformed by the earthquake motion, the behavior of the uppermost portion of the external frame 30 is the same as that of the uppermost portion of the building 20, whereas the external frame 30 and on the lower layer side of the uppermost part of the building 20, the deformation of the external frame 30 is smaller than the deformation of the building 20, and the deformation difference ΔX becomes larger as it goes to the lower layer. Thereby, the damping damper 40 which connects the external frame 30 and the building 20 every several layers is deformed greatly toward the lower layer and absorbs a large amount of energy.

  Here, the vibration-damping structure 10 having the above-described structure uses the building 20 that is an existing building, constructs an external frame 30 outside the building, and fixes the upper part to the roof of the building 20. It is obtained by connecting the external frame 30 with a plurality of vibration dampers 40 in a plurality of layers. At this time, a space that allows people to enter and exit the building 20 is formed between the lower end of the external frame 30 and the foundation 1 of the building 20.

  As described above, the vibration suppression building 10 according to the present embodiment is disposed facing the vibration suppression target building 20 and the outer periphery 20A of the building 20, the upper portion is fixed to the building 20, and the lower end is the building 20. The outer frame 30 having a higher rigidity than the building 20 and the building 20 and the outer frame 30 are connected in a plurality of layers. A damping damper 40 that is deformed according to relative displacement with the external frame 30 and absorbs vibration energy of the building 20 is provided. In this vibration control building 10, when the building 20 is deformed by the earthquake motion, the deformation difference ΔX between the external frame 30 and the building 20 becomes larger as it goes to the lower layer, so that the external frame 30 and the building 20 are formed in a plurality of layers. The vibration damping damper 40 to be coupled is greatly deformed toward the lower layer and absorbs a large amount of energy (see FIG. 5).

  In other words, according to the vibration damping building 10 according to the present embodiment, the vibration damping damper 40 is effectively provided with the vibration damping damper 40 regardless of the ratio of the natural period between the building 20 and the external frame 30 or the weight ratio (mass ratio). Vibration energy can be absorbed. Further, the foundation of the external frame 30 that receives the load of the external frame 30 and bears the horizontal force is not necessary. Therefore, the vibration control effect can be effectively exhibited while suppressing the complexity of the design, the increase in constraints, and the increase in scale of the foundation 1.

  Moreover, according to the vibration control building 10 which concerns on this embodiment, the vibration suppression effect can be exhibited effectively, without giving an earthquake-proof reinforcement inside the building 20, or installing a vibration suppression apparatus. In addition, a passage for entering and exiting the building 20 can be secured between the lower end of the external frame 30 and the foundation 1 of the building 20. Therefore, it is possible to carry out the seismic retrofit while using the existing building 20, that is, the seismic retrofit by construction while living. Further, in the vibration damping structure in which the vibration damping device is installed between the layers, the vibration damping effect is small for small vibrations such as wind and small and medium earthquakes. However, in the vibration damping building 10 according to this embodiment, the deformation of each layer is Since the accumulated deformation is applied to the vibration damper 40, a large vibration damping effect can be obtained even with small vibrations.

  Further, in the vibration control building 10 according to the present embodiment, the external frame 30 is configured to surround the outer periphery of the building 20, is fixed to the building 20 on the roof floor, and a plurality of vibration dampers 40 are provided in the building. It deforms with respect to the relative displacement in any direction in the horizontal direction generated between 20 and the external frame 30, and absorbs the vibration energy of the building 20. Thereby, the deformation | transformation of the horizontal direction which arises from the roof floor of the building 20 to a lower layer can be suppressed.

  FIG. 6 is an elevation view showing a vibration control building 100 according to another embodiment, and FIG. 7 is a plan view showing the vibration control building 100. As shown in these drawings, the vibration suppression building 100 according to the present embodiment includes a building 120, an external frame 130, a plurality of vibration dampers 40 provided between them, the external frame 130, and the foundation 1. And a rolling support 150 provided between the two. The building 120 is a new building such as a steel structure, a reinforced concrete structure, or a steel reinforced concrete structure. On the predetermined floor above the intermediate floor (the center in the height direction) of the building 120, the tip of the beam 122 (see FIG. 7) protrudes from the outer periphery 120A along the entire circumference.

  The external frame 130 is a tube frame configured in a cylindrical shape so as to surround the outer periphery of the building 120. The external frame 130 includes a plurality of pillars 132 arranged around the building 120 at intervals, and an annular slab 134 that couples the plurality of pillars 132. The column 132 is a steel structure, a reinforced concrete structure, a steel reinforced concrete structure, a concrete-filled steel pipe structure, or the like, and the slab 134 is a steel structure, a reinforced concrete structure, or the like.

  The pillar 132 is provided parallel to the outer periphery 120A of the building 120 and spaced from the outer periphery 120A. The column 132 extends from the lower floor of the building 120 to the beam 122, and the lower end of the column 132 is supported on the foundation 1 of the building 120 via the rolling support 150, and the upper end of the column 132 is the tip of the beam 122. Are coupled (fixed, tightly coupled) so as not to be displaced relative to each other. Here, the lower end of the pillar 132 and the foundation 1 are cut so that they can be relatively moved by the rolling bearing 150 in all directions of 360 °.

  Further, the slab 134 projects from the pillar 132 to the inner peripheral side. Here, the slab 134 is provided every several layers of the building 120 and is separated from the outer periphery 120 </ b> A of the building 120.

  Although illustration is omitted, the support body 38 is fixed to the tip of the beam 122, and the uppermost slab 134 is fixed to the support body 38 by anchors, bolts, or the like. That is, the uppermost part of the external frame 130 is coupled (that is, fixed and tightly coupled) to the building 120 so as not to be relatively displaced in the horizontal direction on a predetermined floor above the center in the height direction of the building 120.

  A plurality of damping dampers 40 are arranged in each layer every several layers of the building 120. The plurality of damping dampers 40 in each layer are arranged between the slab 134 and the building 120, and connect the slab 134 and the building 120 in the horizontal direction. Here, the plurality of damping dampers 40 of each layer are configured to be deformed in accordance with relative displacements of the building 120 and the slab 134 in all directions of 360 degrees to absorb the vibration energy of the building 120.

  Here, the rigidity with respect to the seismic force of the entire external frame 130 is set higher than the rigidity with respect to the seismic force of the entire building 120. Further, as described above, the upper portion of the external frame 130 is tightly coupled to the building 120 on the upper layer side than the central portion in the height direction. Further, the lower end of the external frame 130 and the foundation 1 of the building 120 are cut off by a rolling support 150 so that the seismic force is not easily transmitted from the foundation 1 to the external frame 130.

  For this reason, as shown in the elevation view of FIG. 8, when the building 120 is deformed by the earthquake motion, the behavior of the uppermost part of the external frame 130 is the binding floor on the upper layer side from the center in the height direction of the building 120. On the other hand, the deformation of the external frame 130 is smaller than the deformation of the building 120 on the lower layer side than the tight floors of the external frame 130 and the building 120, and the deformation difference increases as the level goes down. Become. Thereby, the several damping damper 40 which connects the external frame 130 and the building 120 for every several layers deform | transforms so that it goes to a lower layer, and absorbs big energy.

  As described above, the vibration suppression building 100 according to the present embodiment is arranged facing the vibration suppression target building 120 and the outer periphery 120A of the building 120, the upper portion is fixed to the building 120, and the lower end is the building 120. The outer frame 130 which is separated from the foundation 1 of the building and has higher rigidity than the building 120, the rolling frame 150 which is arranged between the outer frame 130 and the foundation 1, and cuts the edges thereof, and the building 120 and the outer frame 130 And a plurality of damping dampers 40 that are deformed according to relative displacement between the building 120 and the external frame 130 and absorb the vibration energy of the building 120. In this vibration control structure 100, when the building 120 is deformed by the earthquake motion, the deformation difference between the external frame 130 and the building 120 increases as it goes to the lower layer, so that the space between the external frame 130 and the outer periphery 120A of the building 120 is increased. The vibration damping damper 40 disposed in the upper part of the vibration damper is deformed greatly toward the lower layer and absorbs a large amount of energy.

  According to the damping structure 100 according to the present embodiment, the vibration energy of the building 120 is effectively applied to the damping damper 40 regardless of the ratio of the natural period and the weight ratio (mass ratio) of the building 120 and the external frame 130. Can be absorbed. Moreover, since the edge of the external frame 130 and the foundation 1 is cut by the rolling support 150, the foundation of the external frame 130 that bears the horizontal force at the time of an earthquake becomes unnecessary. Therefore, the vibration control effect can be effectively exhibited while suppressing the complexity of the design, the increase in constraints, and the increase in scale of the foundation 1. Moreover, by receiving the load of the external frame 130 on the foundation 1, the load of the external frame 130 acting on the building 120 can be reduced, and the weight of the external frame 130 can be increased regardless of the support capability of the building 120. .

  In addition, the above-mentioned embodiment is for making an understanding of this invention easy, and does not limit this invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof. For example, in the above-described embodiment, the building to be controlled is a building such as a building (a building or an existing residence building). However, a building that does not correspond to the definition of a building, a non-existing residence building, etc. Good. The external structure is a column beam frame or a tube frame, but may be a wall-like structure or the like.

  Moreover, although the damping damper 40 is provided every several layers between the building 20 (120) and the external frame 30 (130), how many layers the damping damper 40 is provided depends on the required amount of attenuation. The damping damper 40 may be provided in all layers. In addition, the external frame 30 (130) is configured to surround the entire outer periphery of the building 20 (120). However, the external frame 30 (130) is formed on a part of the outer periphery of the building 20 (120) in the circumferential direction. What is necessary is just to be provided facing.

  Furthermore, in the damping structure 100 according to the above-described embodiment, the edge of the external frame 130 and the foundation 1 is cut by providing the rolling support 150 between the lower end of the external frame 130 and the foundation 1. A sliding bearing may be provided instead of the bearing 150, or these edges may be cut by providing a rolling bearing or a sliding bearing between the lower end of the external frame 130 and the ground around the foundation 1.

1 foundation, 10 vibration control building, 20 building, 20A outer periphery, 30 external frame, 32 brace frame, 32A vertical brace, 34 vertical brace, 35, 36 horizontal brace, 38 support, 40 vibration damper, 100 vibration control building Objects, 120 buildings, 120A outer circumference, 122 beams, 130 external frames, 132 columns, 134 slabs, 150 rolling bearings

Claims (5)

A structure subject to vibration control,
It is arranged facing the outer periphery of the building, the upper part is fixed to the building, and the lower end is edged so that seismic force is not directly input to the foundation of the building. A highly rigid external structure,
A plurality of damping dampers connecting the building and the external structure in a plurality of layers, and deforming according to relative displacement between the building and the external structure to absorb vibration energy of the building; Damping structure to prepare. A structure subject to vibration control,
It is arranged facing the outer periphery of the building, the upper part is fixed to the building, an external structure having higher rigidity than the building,
A rolling bearing or a sliding bearing arranged between the external structure and the foundation of the building or the surrounding ground, and cutting these edges;
A plurality of damping dampers connecting the building and the external structure in a plurality of layers, and deforming according to relative displacement between the building and the external structure to absorb vibration energy of the building; Damping structure to prepare. The external structure is configured so as to surround the outer periphery of the building, and is fixed to the building on the upper layer side than the central portion in the height direction,
The plurality of damping dampers are deformed by any relative displacement in a horizontal direction generated between the building and the external structure to absorb vibration energy of the building. Or the damping structure of Claim 2. An external structure having higher rigidity than the structure subject to vibration suppression is provided so as to face the outer periphery of the building so that seismic force is not directly input from the foundation of the building. Fixed to the building,
The building and the external structure are connected in a plurality of layers by a plurality of vibration dampers, and the plurality of vibration dampers are deformed according to relative displacement between the building and the external structure, A vibration damping method for a building in which the vibration damping of the building absorbs vibration energy of the building. An external structure having higher rigidity than the structure to be damped faces the outer periphery of the building so that a load acts on the foundation of the building or the surrounding ground via a rolling bearing or a sliding bearing. The upper part of the external structure is fixed to the building,
The building and the external structure are connected in a plurality of layers by a plurality of vibration dampers, and the plurality of vibration dampers are deformed according to relative displacement between the building and the external structure, A vibration damping method for a building in which the vibration damping of the building absorbs vibration energy of the building.