Vibration bumping structure of building skeleton

Abstract

To provide a vibration dumping structure of a building skeleton capable of efficiently preventing the building skeleton from vibrating against vibration input and effectively suppressing a twist generated in the building skeleton.SOLUTION: A vibration dumping structure to dump vibration of a building skeleton 1 constructed with a lower part 1a fixed on the ground G against vibration input is provided with a pair of sub skeletons 2 arranged in a height direction of the building skeleton at both sides of the building skeleton, having apexes 2a rigidly connected on an apex 1b of the building skeleton and lower parts 2b placed upward apart from the ground to form an integrated vibration system with the building skeleton. Vibration bumping devices are provided in attachment areas F placed at each of gaps between each of lower parts of these sub skeletons and a lower part of the building skeleton as being placed in a direction along a circumference of a rigid axis R1 of the building skeleton in a flat surface along a ground surface E, with one end connected to the building skeleton and the other end connected to the sub skeleton.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vibration control structure for a building structure that can efficiently control the vibration of the building structure against vibration input and effectively suppress the torsion generated in the building structure.

Background Art

[0002] There are various techniques for improving the vibration control effect of buildings. For example, Patent Documents 1 and 2 are known.

[0003] The "bending deformation control type seismic isolation structure" of Patent Document 1 consists of a wall column composed of a multi-story seismic element connected to a wall beam that horizontally projects at the top, a connecting column that rises from the tip position of the wall beam on the plane and is insulated from the wall beam, and a seismic isolation device installed between the tip of the wall beam and the top of the connecting column that generates a damping force during relative displacement between the tip of the wall beam and the top of the connecting column. Alternatively, it consists of a pair of wall columns facing each other with the wall beam, and a seismic isolation device installed between the tips of the wall beams of both wall columns. The columns in the building are aggregated into the wall columns, and the beams are aggregated into the wall beams for configuration.

[0004] In the "vibration control structure" of Patent Document 2, the structure is a steel frame reinforced concrete building having a three-story underground ramen structure composed of columns and beams and supported by a foundation. The lower end of the wall-like member is firmly fixed, and the deformation of the wall-like member due to the reaction force of the damper is suppressed, so that the decrease in the expansion and contraction amount (deformation amount) of the damper due to the deformation of the wall-like member is suppressed, and the vibration control effect is improved.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] When a horizontal vibration external force such as an earthquake is input to a building structure, the building structure not only sways laterally in the main direction of the vibration input, but also twists around the rigid center in a plane that horizontally crosses the building structure. It is known that the building structure twists, and there has been a demand for measures to effectively suppress the twisting of the building structure while efficiently damping the building structure against vibration input.

[0007] The present invention was devised in view of the above-described conventional problems, and it is possible to efficiently damp a building structure against vibration input and effectively suppress the twisting that occurs in the building structure. An object is to provide a vibration damping structure for a building structure.

[0008] [Means for Solving the Problems] The vibration damping structure for a building structure according to the present invention is a vibration damping structure for damping a building structure whose lower part is fixed to the ground. A pair of sub-structures are provided along the height direction of the building structure, the top of which is rigidly joined to the top of the building structure, and the lower part is spaced upward from the ground to form a vibration system integrated with the building structure. In each gap between the lower part of each of these sub-structures and the lower part of the building structure, a vibration damping device is provided by arranging it in a direction along the rigid center of the building structure in a plane along the ground surface, connecting one end to the building structure and the other end to the sub-structure.

[0009] ​​​​​​​​​​​In a plane along the ground surface of the pair of the sub - frameworks, both of the rigid centers are arranged on a straight line passing through the rigid center of the building framework. The vibration damping devices are arranged in a pair on both sides of the straight line sandwiching the straight line passing through the rigid center of the building framework, and the arrangement mode of these vibration damping devices is such that the vibration damping effect occurs in a direction where at least a tangent line tangent to a circle centered on the rigid center of the building framework passes through the rigid centers of the pair of the sub - frameworks. When the distance from the rigid center of one of the sub - frameworks to the rigid center of the building framework is La and the distance from the rigid center of the other sub - framework to the rigid center of the building framework is Lb, the damping performance Fa of the vibration damping device connected to one of the sub - frameworks and the damping performance Fb of the vibration damping device connected to the other sub - framework are set in a relationship of La×Fb = Lb×Fa.

[0010] For the building - structure vibration - damping structure according to the present invention, the building structure can be efficiently vibration - damped against vibration input, and the torsion generated in the building structure can be effectively suppressed. FIG. 1 is a front view showing a preferred embodiment of the building - structure vibration - damping structure according to the present invention. FIG. 2 is a side view of the building - structure vibration - damping structure shown in FIG. 1. FIG. 3 is a view taken along line A - A in FIG. 1.

Advantages of the Invention

[0011] In the building - structure vibration - damping structure according to the present invention, the building structure can be efficiently vibration - damped against vibration input, and the torsion generated in the building structure can be effectively suppressed.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0013] Hereinafter, a preferred embodiment of the vibration damping structure of the building structure according to the present invention will be described in detail with reference to the accompanying drawings. and will be described in detail.

[0014] FIG. 1 is a front view showing a preferred embodiment of the vibration damping structure of the building structure according to the present invention, and FIG. 2 is a side view of the vibration damping structure of the building structure shown in FIG. 1, FIG. 3 is a view taken along the line A-A in FIG. 1, and FIG. 4 is a view taken along the line B-B in FIG. 1.

[0015] The building structure 1 to be vibration-damped is constructed with a well-known column-beam structure such as a steel frame structure, a reinforced concrete structure, a steel frame reinforced concrete structure, or a steel-concrete structure.

[0016] The building structure 1 may be a newly constructed building or an existing building. In the illustrated example, the building structure 1 is shown as a rectangular parallelepiped.

[0017] The building structure 1 is constructed such that the lower part 1a in the height direction of the building structure 1 is rigidly fixed to the ground G. In addition, horizontal vibration external forces such as seismic vibrations are input from the lower part 1a into the building structure 1.

[0018] In such a building structure 1, horizontal vibrations that cause rolling occur in the main acting direction of the vibration input. occur.

[0019] The vibration control structure of the building structure according to the present embodiment enables the horizontal vibrations generated in the building structure 1 to be efficiently vibration-controlled by the sub-structure 2 described later. Furthermore, by providing the sub-structure 2, when the vibration control action is working, the torsion D of the building structure 1 generated around the rigid center R1 of the building structure 1 in a plane that horizontally crosses the building structure 1, that is, in a plane along the ground surface E, can also be effectively suppressed. is configured so that it can be effectively suppressed. On both sides of the building structure 1, a pair of sub-structures 2, 2 having the same dimensions and weights are provided. Both sides of the building structure 1 refer to both sides in the length direction or both sides in the width direction in the plane of the building structure 1, and may be both sides in both the width direction and the length direction. In the illustrated example, the sub-structures 2, 2 are provided on both sides in the length direction of the building structure. are provided on both sides in the length direction of the building structure.

[0020] When providing the pair of sub-structures 2, 2 on both sides of the building structure 1, it is desirable to install them so that the rigid center R1 of the building structure 1 itself does not move due to these sub-structures 2 , 2. In other words, it is preferable to arrange the pair of sub-structures 2, 2 evenly around the rigid center R1 of the building structure 1 with respect to the building structure 1. In other words, it is preferable to arrange the pair of sub-structures 2, 2 evenly around the rigid center R1 of the building structure 1 with respect to the building structure 1.

[0021] However, by providing the pair of sub-structures 2, 2 on the building structure 1, the rigidity of the building structure 1 However, by providing the pair of sub-structures 2, 2 on the building structure 1, the rigidity of the building structure 1 is changed.

[0022] In other words, it is preferable to arrange the pair of sub-structures 2, 2 evenly around the rigid center R1 of the building structure 1 with respect to the building structure 1. around.

[0023] However, by providing the pair of sub-structures 2, 2 on the building structure 1, the rigidity of the building structure 1 The center of rigidity R1 may move. In that case, the position after the movement is the center of rigidity of the building structure 1 and is established.

[0024] That is, in this specification, the center of rigidity R1 of the building structure 1 refers to the center of rigidity in the state after a pair of sub-structures 2, 2 are provided in the building structure 1 is established.

[0025] The sub-structure 2 is constructed with a well-known column-beam structure such as a steel frame structure, a reinforced concrete structure, a steel frame-reinforced concrete structure, or a steel-concrete structure. is established.

[0026] The sub-structure 2 is formed along the height direction of the building structure 1 from the top 1b to the bottom 1a of the building structure 1 in a length shorter than the height of the building structure 1.

[0027] Specifically, for the sub-structure 2, the top 2a which is the highest part of the sub-structure 2 is located at approximately the same height as the top 1b which is the highest part of the building structure 1, and the bottom 2b of the sub-structure 2 is higher than the lower end of the building structure 1 fixed to the ground G so as to be spaced upward from the ground G. In the illustrated example, each sub-structure 2, 2 is shown as a long rectangular parallelepiped in the height direction of the building structure 1. is established. is established. is established. is established.

[0028] In order to form an integrated vibration system with the building structure 1, the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1.

[0029] When the top 2a of the sub-structure 2 and the top 1b of the building structure 1 are rigidly joined, the horizontal vibration of the building structure 1 is directly transmitted without being attenuated by the sub-structure 2. is established.

[0030] That is, rigid joining means that, as shown in FIG. 5, the sub-structure 2 is placed on the top 1b of the building structure 1 It means forming a vibration system in which the connected form is assumed.

[0031] In the vibration damping structure of the building structure according to this embodiment, for the vibration system, the top portions 1b and 2a of the building structure 1 and the sub-structure 2 are rigidly joined to place the sub-structure 2 in a relationship parallel to the building structure 1 at a folded-back position with respect to the building structure 1. By rigidly joining the top portions 1b and 2a of the building structure 1 and the sub-structure 2 to each other, the sub-structure 2 is arranged at a folded-back position with respect to the building structure 1 in a relationship parallel to the building structure 1. In the relationship parallel to the building structure 1, the sub-structure 2 is arranged at a folded-back position with respect to the building structure 1.

[0032] In the vibration system composed of the building structure 1 and the sub-structure 2, the lower portion 1a of the building structure 1 fixed to the ground G becomes a fixed end, and the assumed uppermost portion (the lower portion 2b of the sub-structure 2 in the folded arrangement in this embodiment) 2b of the sub-structure 2 rigidly joined to the top portion 1b of the building structure 1 becomes a free end. When a horizontal vibration is input to the building structure 1, the assumed uppermost portion (the lower portion 2b of the sub-structure 2 in the folded arrangement in this embodiment) 2b of the sub-structure 2 that becomes a free end has the maximum displacement (maximum amplitude) of the horizontal vibration. In the folded arrangement of the sub-structure 2 in this embodiment, the lower portion 2b of the sub-structure 2 becomes a free end.

[0033] When a horizontal vibration is input to the building structure 1, the assumed uppermost portion (the lower portion 2b of the sub-structure 2 in the folded arrangement in this embodiment) 2b of the sub-structure 2 that becomes a free end has the maximum displacement (maximum amplitude) of the horizontal vibration. In the folded arrangement of the sub-structure 2 in this embodiment, the lower portion 2b of the sub-structure 2 becomes a free end. The maximum displacement (maximum amplitude) of the horizontal vibration occurs.

[0034] Regarding the rigid joining that joins the top portion 2a of the sub-structure 2 and the top portion 1b of the building structure 1, since there is no member or material with "zero" attenuation, it means that vibration transmission with as little attenuation as possible should be performed between the building structure 1 and the sub-structure 2. Since there is no member or material with "zero" attenuation, it means that vibration transmission with as little attenuation as possible should be performed between the building structure 1 and the sub-structure 2. It means that vibration transmission with as little attenuation as possible should be performed between the building structure 1 and the sub-structure 2.

[0035] Also, the sub-structure 2 functions as a weight linked to the vibration damping device 3 described later with respect to the building structure 1 that is the vibration damping target in the integrated vibration system with the building structure 1. The weight of the sub-structure 2 is desirably 3.5 to 50% of the weight of the main structure 1. In the integrated vibration system with the building structure 1, the sub-structure 2 functions as a weight linked to the vibration damping device 3 described later with respect to the building structure 1 that is the vibration damping target. The weight of the sub-structure 2 is desirably 3.5 to 50% of the weight of the main structure 1. It is desirable that the weight of the sub-structure 2 is 3.5 to 50% of the weight of the main structure 1.

[0036] Each sub-structure 2 forms an integrated vibration system with the building structure 1, and the lower portion 2b becomes the free end of the vibration system. , the respective lower parts 2b, 2b of 0.2, and the building that the lower parts 2b, 2b of the sub-frameworks 2, 2 face A gap S is provided between the lower part 1a of the framework 1 and the lower parts 2b, 2b of the sub-frameworks 2, 2.

[0037] In these gaps S, as shown by the reference sign F in FIGS. 1, 2, and 4, one end is connected to the sub-framework 2, and the other end is connected to the building framework 1, and is transmitted from the building framework 1 to the sub-framework 2 through a rigid joint to attach a vibration damping device 3 for damping the horizontal vibration generated in the sub-framework 2. An attachment region is set.

[0038] That is, by providing the sub-framework 2 and the vibration damping device 3 on the building framework 1, in a spring system For a certain building framework 1, the sub-framework 2 is used as a mass (weight) element, and the vibration damping device 3 is used as a damping element It is configured to damp the building framework 1 against horizontal vibration input.

[0039] And the vibration damping device 3 dampens the vibration generated at the lower part 2b of the sub-framework 2, which is the free end where the maximum displacement occurs, in an integral vibration system, while being supported by the building framework 1.

[0040] Of course, the vibration damped by the vibration damping device 3 may be any vibration that occurs relatively between the sub-framework 2 and the building framework 1.

[0041] As the vibration damping device 3, various well-known devices may be adopted. For example, an oil damper that expands and contracts between the building framework 1 and the sub-framework 2 to damp vibration is used.

[0042] The vibration damping device 3 is also arranged along the direction around the rigid center R1 of the building framework 1 and is provided between the building framework 1 and the sub-framework 2.

[0043] By providing a pair of secondary frameworks 2 to the building framework 1, as described above, in the case of horizontal vibration input there may be a torsion D generated around the rigid center R1 in the building framework 1.

[0044] When the torsion D occurs in the building framework 1, the vibration damping device 3 supports the lower part 1a of the building framework 1 and suppresses the movement of the lower part 2b of the secondary framework 2 that is displaced by the torsion transmitted from the building framework 1. Thereby, the torsion D of the building framework 1 is effectively suppressed.

[0045] Regarding the arrangement mode of the vibration damping device 3 in the attachment region F described above, with reference to FIGS. 6 to 9 it will be described below.

[0046] FIG. 6 is a schematic plan view for explaining the arrangement mode of the vibration damping device in the vibration damping structure of the building framework according to the present embodiment, and FIG. 7 is a schematic plan view for explaining an example of the arrangement state of the vibration damping device in the attachment region. FIG. 7 is a schematic plan view for explaining an example of the arrangement state of the vibration damping device in the attachment region. It is a schematic plan view.

[0047] At the height position where the attachment region F of the vibration damping device 3 is set, the rigid center R1 in the plane along the ground surface E of the building framework 1 and the rigid centers R2, R2 of the pair of secondary frameworks 2, 2 in the plane along the same ground surface E as the ground G on which the building framework 1 is constructed are both arranged on a straight line L. That is, the rigid centers R2, R2 of the pair of secondary frameworks 2, 2 are both arranged on a straight line L passing through the rigid center R1 of the building framework 1. are arranged on a straight line L. From this, the pair of secondary frameworks 2, 2 are constructed on both sides of the building framework 1 such that their rigid centers R2, R2 are arranged side by side on a straight line L passing through the rigid center R1 of the building framework 1.

[0048] That is, the rigid centers R2, R2 of the pair of secondary frameworks 2, 2 are both arranged on a straight line L passing through the rigid center R1 of the building framework 1. are arranged on a straight line L passing through the rigid center R1 of the building framework 1.

[0049] From this, the pair of secondary frameworks 2, 2 are constructed on both sides of the building framework 1 such that their rigid centers R2, R2 are arranged side by side on a straight line L passing through the rigid center R1 of the building framework 1. 1.

[0050] In the attachment region F of the vibration damping device 3 set in the gap S, the vibration damping device 3 is, firstly, arranged on both sides of a straight line L passing through the rigid center R2, R2 of a pair of secondary frameworks 2, 2 through the rigid center R1 of the building structure 1, and is arranged in a pair on both sides of the straight line L (see Fig. 7).

[0051] As long as the vibration damping devices 3 are a pair with respect to the straight line L, the number of devices installed is not limited.

[0052] Therefore, the vibration damping devices 3 are arranged in a pair on one side and the other side divided by the straight line L with respect to the rigid centers R2, R2 of each of the secondary frameworks 2, 2.

[0053] Secondly, the arrangement pattern of these vibration damping devices 3 is set by a tangent line Tn (n is a natural number) drawn from the rigid centers R2, R2 of each secondary framework 2, 2 towards a circle Cn (n is a natural number) drawn around the rigid center R1 (the center of the torsion D) of the building structure 1.

[0054] The tangent line Tn from the rigid center R2 of the secondary framework 2 is drawn in a pair on both one side and the other side divided by the straight line L.

[0055] A plurality of circles Cn centered on the rigid center R1 of the building structure 1 can be drawn with different radii, and a plurality of tangent lines Tn taken from the rigid center R2 of the secondary framework 2 so as to be tangent to each of these plurality of circles Cn are also a plurality.

[0056] The pair of vibration damping devices 3, 3 arranged on both sides of the straight line L are arranged so that the vibration damping effect occurs in the direction of the tangent line T n tangent to the circle Cn.

[0057] ​​​​​​Regardless of which tangent line Tn of which circle Cn, any tangent line Tn of any circle Cn is arranged in the direction thereof.

[0058] Among the plurality of circles Cn around the rigid center R1 of the building structure 1, the outermost and largest-radius circle (hereinafter also referred to as the maximum circle) Cn, the displacement of the twist D of the top 1b of the building structure 1 along it becomes the largest Therefore, the vibration damping device 3 connected to the lower part 2b of the secondary structure 2 to which the twist D is directly transmitted from the top 1b of the building structure 1 is installed in the mounting area F so as to be able to effectively suppress the twist D. As long as the vibration damping device 3 can be installed in the mounting area F, the vibration damping action (twist suppression action) occurs toward the tangent line Tn from the rigid center R2 of the secondary structure 2 that touches this maximum circle Cn. It is desirable to be arranged with the direction set so as to occur. It is desirable to be arranged with the direction set so as to occur.

[0059] For an oil damper that performs the above-described telescopic movement and vibration damping, the telescopic movement direction is directed toward the tangent line Tn from the rigid center R2 of the secondary structure 2 to the maximum circle Cn.

[0060] In terms of the arrangement form, as shown in FIG. 7, the vibration damping device 3 is connected to the building structure 1 at one end 3a within the mounting area F of the vibration damping device 3 set in the gap S, and the other end 3b can be connected to the secondary structure 2 As long as possible, it is in a horizontal posture with respect to the ground surface E, and with respect to the above straight line L, the distance from the straight line L is short at the other end 2b on the secondary structure 2 side and long at the one end 3a on the building structure 1 side In an oblique relationship, and in the relationship between a pair of vibration damping devices 3, 3 of each secondary structure 2, the one ends 3a are separated from each other on the building structure 1 side, and the other ends 3b are close to each other on the secondary structure 2 side It is desirable to be arranged in a "H" shape in plan view. In an oblique relationship, and in the relationship between a pair of vibration damping devices 3, 3 of each secondary structure 2, the one ends 3a are separated from each other on the building structure 1 side, and the other ends 3b are close to each other on the secondary structure 2 side In an oblique relationship, and in the relationship between a pair of vibration damping devices 3, 3 of each secondary structure 2, the one ends 3a are separated from each other on the building structure 1 side, and the other ends 3b are close to each other on the secondary structure 2 side It is desirable to be arranged in a "H" shape in plan view.

[0061] ​The vibration damping device 3 arranged in this way can generate a vibration damping effect and play a damping role by inputting the component force of the vibration force regardless of the vibration mode generated between the building structure 1 and the sub-structure 2. That is, regardless of the vibration mode, the component force of the vibration force is input, thereby generating a vibration damping effect and playing a damping role. Of course, this goes without saying.

[0062] In short, the arrangement mode of the vibration damping device 3 provided between each sub-structure 2 and the building structure 1 is such that at least one tangent Tn that touches any circle Cn centered on the rigid center R1 of the building structure 1 is provided in a direction passing through the rigid center R2 of the sub-structure 2 so that a vibration damping effect is generated. In this way, the vibration damping device 3 can effectively damp the vibration of the building structure 1 caused by the horizontal vibration input through the above-mentioned integrated vibration system, and at the same time effectively suppress the torsion D generated in the building structure 1. That is, the vibration damping device 3 effectively damps the vibration of the building structure 1 caused by the horizontal vibration input through the above integrated vibration system, and at the same time effectively suppresses the torsion D generated in the building structure 1. through the integrated vibration system, and at the same time effectively suppresses the torsion D generated in the building structure 1. It has become like this.

[0063] Regarding the action of the vibration control structure of the building structure according to this embodiment, when a horizontal vibration external force such as an earthquake motion is generated in the ground G and this vibration external force is input to the building structure 1, since the top 1b of the building structure 1 and the top 2a of the sub-structure 2 are rigidly joined, with the lower part 1a of the building structure 1 fixed to the ground G as the fixed end and the lower parts 2b of the pair of sub-structures 2 provided on both sides of the building structure 1 as the free ends, vibration occurs in the integrated vibration system shown in FIG. 5. Also, when a vibration control action acts on the building structure 1, torsion D occurs around the rigid center R1 of the building structure 1. The vibration damping device 3 provided in each gap S between the lower part 1a of the building structure 1 and each of the lower parts 2b of the pair of sub-structures 2 can use the building structure 1 as a spring element, the sub-structure 2 as a mass element, and the vibration damping device 3 as a damping element to control the vibration of the building structure 1 against the vibration input. That is, the vibration damping device 3 provided in each gap S between the lower part 1a of the building structure 1 and each of the lower parts 2b of the pair of sub-structures 2 can use the building structure 1 as a spring element, the sub-structure 2 as a mass element, and the vibration damping device 3 as a damping element to control the vibration of the building structure 1 against the vibration input. When a vibration control action acts on the building structure 1, torsion D occurs around the rigid center R1 of the building structure 1.

[0064] The vibration damping device 3 provided in each gap S between the lower part 1a of the building structure 1 and each of the lower parts 2b of the pair of sub-structures 2 can use the building structure 1 as a spring element, the sub-structure 2 as a mass element, and the vibration damping device 3 as a damping element to control the vibration of the building structure 1 against the vibration input. That is, the vibration damping device 3 provided in each gap S between the lower part 1a of the building structure 1 and each of the lower parts 2b of the pair of sub-structures 2 can use the building structure 1 as a spring element, the sub-structure 2 as a mass element, and the vibration damping device 3 as a damping element to control the vibration of the building structure 1 against the vibration input. It is possible to control the vibration of the building structure 1 against the vibration input. Furthermore, the vibration damping device 3 is arranged along the center of rigidity R1 of the building structure 1. As a result, the torsional displacement D of the building structure 1 can also be suppressed by the vibration damping device 3.

[0065] Regarding the suppression of the torsional displacement D, specifically, the torsional displacement D generated at the top 1b of the building structure 1 is transmitted to the secondary structure 2 through the rigid connection. When the lower part 2b of the secondary structure 2 is displaced relative to the lower part 1a of the building structure 1, torsional forces from the building structure 1 act on each of the pair of vibration damping devices 3 of each secondary structure 2 along the tangent Tn of the circle Cn around the center of rigidity R1 of the building structure 1. A compressive force is input to one of the pair of vibration damping devices 3, 3, and a tensile force is input to the other, so that the torsional force can be attenuated.

[0066] In this way, a force can be applied to the vibration damping device 3 in the direction of the torsional displacement D (tangential direction), and the torsional displacement D generated in the building structure 1 can be effectively suppressed.

[0067] The torsional deformation generated in the building structure 1 is most prominent at the lower part 2b of the secondary structure 2 that becomes the free end. Therefore, by connecting the lower part 2b of the secondary structure 2 where the deformation is prominent to the lower part 1a of the building structure 1 via the vibration damping device 3, the torsional displacement D generated in the building structure 1 can be efficiently and effectively suppressed.

[0068] Particularly, if the vibration damping device 3 is arranged so that the vibration damping effect occurs along the tangent Tn from the center of rigidity R2 of the secondary structure 2 that is in contact with the above-mentioned maximum circle Cn where the displacement of the torsional displacement D of the building structure 1 is the largest, the torsional displacement D generated in the building structure 1 can be suppressed most effectively and efficiently.

[0069] Furthermore, when the phase of torsion between the lower part 1a of the building structure 1, which is the fixed end of the integral vibration system, and the lower part 2b of the auxiliary structure 2, which is the free end, is in the reverse phase, the maximum relative displacement of torsion is input to the vibration damping device 3 arranged along the tangent Tn of the maximum circle Cn, and the maximum torsion suppression effect can be exerted. When the phase of torsion between the lower part 1a of the building structure 1, which is the fixed end of the integral vibration system, and the lower part 2b of the auxiliary structure 2, which is the free end, is in the reverse phase, the maximum relative displacement of torsion is input to the vibration damping device 3 arranged along the tangent Tn of the maximum circle Cn, and the maximum torsion suppression effect can be exerted. When the phase of torsion between the lower part 1a of the building structure 1, which is the fixed end of the integral vibration system, and the lower part 2b of the auxiliary structure 2, which is the free end, is in the reverse phase, the maximum relative displacement of torsion is input to the vibration damping device 3 arranged along the tangent Tn of the maximum circle Cn, and the maximum torsion suppression effect can be exerted. When the phase of torsion between the lower part 1a of the building structure 1, which is the fixed end of the integral vibration system, and the lower part 2b of the auxiliary structure 2, which is the free end, is in the reverse phase, the maximum relative displacement of torsion is input to the vibration damping device 3 arranged along the tangent Tn of the maximum circle Cn, and the maximum torsion suppression effect can be exerted.

[0070] The vibration damping device 3 arranged in this way can not only suppress the torsion D, but also attenuate the vibration in the horizontal direction that vibrates the building structure 1 as described above, and can damp the building structure 1 with respect to the component force of the vibration input. The vibration damping device 3 arranged in this way can not only suppress the torsion D, but also attenuate the vibration in the horizontal direction that vibrates the building structure 1 as described above, and can damp the building structure 1 with respect to the component force of the vibration input. The vibration damping device 3 arranged in this way can not only suppress the torsion D, but also attenuate the vibration in the horizontal direction that vibrates the building structure 1 as described above, and can damp the building structure 1 with respect to the component force of the vibration input.

[0071] Figs. 8 and 9 are explanatory diagrams for explaining the case where the rigid center R1 of the building structure 1 is displaced from the centroid X in the plane along the ground surface E of the building structure 1. Figs. 8 and 9 are explanatory diagrams for explaining the case where the rigid center R1 of the building structure 1 is displaced from the centroid X in the plane along the ground surface E of the building structure 1.

[0072] In Fig. 6, the rigid center R1 of the building structure 1 coincides with the centroid, but there may be a case where they are displaced. In Fig. 6, the rigid center R1 of the building structure 1 coincides with the centroid, but there may be a case where they are displaced.

[0073] Fig. 8 shows a case where, on the straight line L along the length direction of the building structure 1, the distance (La) from the rigid center R2 of one auxiliary structure 2 to the rigid center R1 of the building structure 1 is close, and the distance (Lb) from the rigid center R2 of the other auxiliary structure 2 to the rigid center R1 of the building structure 1 is far. Fig. 8 shows a case where, on the straight line L along the length direction of the building structure 1, the distance (La) from the rigid center R2 of one auxiliary structure 2 to the rigid center R1 of the building structure 1 is close, and the distance (Lb) from the rigid center R2 of the other auxiliary structure 2 to the rigid center R1 of the building structure 1 is far. Fig. 8 shows a case where, on the straight line L along the length direction of the building structure 1, the distance (La) from the rigid center R2 of one auxiliary structure 2 to the rigid center R1 of the building structure 1 is close, and the distance (Lb) from the rigid center R2 of the other auxiliary structure 2 to the rigid center R1 of the building structure 1 is far.

[0074] In each of the auxiliary structures 2, 2, the arrangement directions of the pair of vibration damping devices 3, 3 are in a "V" shape that is oblique to the above-mentioned straight line L as described above, and the relationship between the damping performance Fa of the vibration damping device 3 connected to one auxiliary structure 2 and the damping performance Fb of the vibration damping device 3 connected to the other auxiliary structure 2 is set to La × Fb = Lb × Fa. In each of the auxiliary structures 2, 2, the arrangement directions of the pair of vibration damping devices 3, 3 are in a "V" shape that is oblique to the above-mentioned straight line L as described above, and the relationship between the damping performance Fa of the vibration damping device 3 connected to one auxiliary structure 2 and the damping performance Fb of the vibration damping device 3 connected to the other auxiliary structure 2 is set to La × Fb = Lb × Fa. In each of the auxiliary structures 2, 2, the arrangement directions of the pair of vibration damping devices 3, 3 are in a "V" shape that is oblique to the above-mentioned straight line L as described above, and the relationship between the damping performance Fa of the vibration damping device 3 connected to one auxiliary structure 2 and the damping performance Fb of the vibration damping device 3 connected to the other auxiliary structure 2 is set to La × Fb = Lb × Fa. In each of the auxiliary structures 2, 2, the arrangement directions of the pair of vibration damping devices 3, 3 are in a "V" shape that is oblique to the above-mentioned straight line L as described above, and the relationship between the damping performance Fa of the vibration damping device 3 connected to one auxiliary structure 2 and the damping performance Fb of the vibration damping device 3 connected to the other auxiliary structure 2 is set to La × Fb = Lb × Fa.

[0075] FIG. 9 shows a case of an anisotropic building in which the center of rigidity R1 of the building structure 1 is displaced from the center of rigidity R0 in the width direction and the length direction due to the overhanging portion 1c (center of rigidity Rc), etc. Even in this case, with respect to the center of rigidity R1 of the anisotropic building structure 1, both centers of rigidity R2, R2 in the plane along the ground surface E of the pair of sub-structures 2, 2

[0076] are arranged on a straight line L passing through the center of rigidity R1 of the building structure 1. The sub-structures 2, 2 are arranged with respect to the building structure 1 such that both centers of rigidity R2, R2 in the plane along the ground surface E of the pair of sub-structures 2, 2 are arranged on a straight line L passing through the center of rigidity R1 of the building structure 1. On this straight line L, based on the distance (La) from the center of rigidity R2 of one sub-structure 2 to the center of rigidity R1 of the building structure 1 and the distance (Lb) from the center of rigidity R2 of the other sub-structure 2 to the center of rigidity R1 of the building structure 1, the relationship between the damping performance Fa of the vibration damping device 3 connected to one sub-structure 2 and the damping performance Fb of the vibration damping device 3 connected to the other sub-structure 2 is set to La×Fb = Lb×Fa. That is, although the position of the center of rigidity R1 of the building structure 1 is diverse, if the dimensions and weights of the pair of sub-structures 2, 2 are made the same, and both centers of rigidity R2, R2 in the plane along the ground surface E of these sub-structures 2 are arranged on a straight line L passing through the center of rigidity R1 of the building structure 1, the damping performance of the vibration damping device 3 of one sub-structure 2 can be set in a well-balanced manner by multiplying the ratio of the distance between the center of rigidity R1 of the building structure 1 and the center of rigidity R2 of each sub-structure 2 to the damping performance of the vibration damping device 3 of the other sub-structure 2, and the torsion generated due to the imbalance of the structure arrangement, etc. can be effectively suppressed.

[0077] In the vibration damping structure of the building structure according to the present embodiment, as shown in FIG. 1, the pair of sub-structures 2, 2 are provided such that only the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1. In this way, only the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1. In this way, only the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1. In this way, only the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1. In this way, only the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1. In this way, only the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1. In this way, only the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1.

[0078] In the vibration damping structure of the building structure according to the present embodiment, the pair of sub-structures 2, 2 are provided such that only the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1, as shown in FIG. 1. That is, only the top 2a of the sub-structure 2 is rigidly joined to the top 1b of the building structure 1. As a result, each of these sub-structures 2 is suspended and supported from the top 1b of the building structure 1 and installed. It is provided.

[0079] The top 1b of the building structure 1 that is rigidly joined to the top 2a of the sub-structure 2 is, as necessary, made more rigid than other parts of the building structure 1 other than the top 1a of the building structure 1, as shown by the hatched area J in FIG. 1, so as to withstand the suspension support of the sub-structure 2. The top 1b of the building structure 1 that can suspend and support the sub-structure 2 is set to have a higher rigidity. As shown by the hatched area J in FIG. 1. It is.

[0080] To improve the rigidity of the top 1b of the building structure 1 that can suspend and support the sub-structure 2, for example, when increasing the amount of iron in the column-beam structure that constitutes the top 1b, or when the building structure 1 is made of RC construction, only the top 1b is made of SRC construction. Well-known means for enhancing rigidity such as this may be adopted. 1b can be used. b can be made of SRC construction alone.

[0081] Also, instead of uniformly increasing the rigidity of the entire top 1b of the building structure 1, as shown by the hatched area K in FIG. 3, it is of course possible to set the rigidity high only for the periphery of the part where the rigid joining is performed. As shown by the hatched area K in FIG. 3. It is of course possible to do so.

[0082] FIG. 10 shows a modified example of the vibration control structure of the building structure according to this embodiment. In this modified example, a support portion 4 is integrally provided so as to project downward from the lower portion 1a of the building structure 1 below the lower portion 2b of the sub-structure 2. In this modified example, a support portion 4 is integrally provided so as to project downward from the lower portion 1a of the building structure 1 below the lower portion 2b of the sub-structure 2. It is provided.

[0083] On this support portion 4, an aseismic bearing 5 is provided between the lower portion 2b of the sub-structure 2 to support at least a part of the weight of the sub-structure 2 suspended and supported from the top 1a of the building structure 1 without hindering the vibration damping action of the vibration damping device 3. As the aseismic bearing 5, for example, a laminated rubber type aseismic device or a ball slide mechanism is used. On this support portion 4, between the lower portion 2b of the sub-structure 2, at least a part of the weight of the sub-structure 2 suspended and supported from the top 1a of the building structure 1 is supported without hindering the vibration damping action of the vibration damping device 3. An aseismic bearing 5 is provided. As the aseismic bearing 5, for example, a laminated rubber type aseismic device or a ball slide mechanism is used. It is used.

[0084] By supporting part or all of the weight of the secondary structure 2 with the seismic isolation bearing 5, the burden on the top 1b of the building structure 1 to which the secondary structure 2 is joined to support the entire weight of the secondary structure 2 can be reduced. As a result, the rigidity of the top 1b of the building structure 1 can be set to be small, and the workability can be improved.

Explanation of Symbols

[0085] 1 Building structure 1a Lower part of the building structure 1b Top of the building structure 2 Secondary structure 2a Top of the secondary structure 2b Lower part of the secondary structure 3 Vibration damping device 3a One end of the vibration damping device 3b The other end of the vibration damping device Cn Circle centered on the rigid center of the building structure D Torsion E Ground surface Fa Damping performance of the vibration damping device connected to one secondary structure Fb Damping performance of the vibration damping device connected to the other secondary structure G Ground L Straight line passing through the rigid centers of a pair of secondary structures and the rigid center of the building structure La Distance from the rigid center of one secondary structure to the rigid center of the building structure Lb Distance from the rigid center of the other secondary structure to the rigid center of the building structure R1 Rigid center of the building structure R2 Rigid center of the secondary structure S Gap Tn Tangent line in contact with the circle and passing through the rigid center of the secondary structure​​

Claims

1. A vibration damping structure for damping a building structure constructed with its lower part fixed to the ground against vibration input, on both sides of the building structure, provided along the height direction of the building structure, with the top rigidly joined to the top of the building structure, the lower part spaced upward from the ground, and forming a vibration system integral with the building structure, a pair of auxiliary structures are provided. In each gap between the lower part of each of these auxiliary structures and the lower part of the building structure, they are arranged in a direction along the centroid of the building structure in a plane along the ground surface, with one end connected to the building structure and the other end connected to the auxiliary structure, and vibration damping devices are provided. The vibration damping device is provided only at the location connecting the lower part of the auxiliary structure that is the free end and the vicinity of the lower part of the building structure that is the fixed end. A vibration damping structure for a building structure is characterized by this.

2. Both centroids of the pair of auxiliary structures in the plane along the ground surface are arranged on a straight line passing through the centroid of the building structure. The vibration damping devices are arranged in a pair on both sides of the straight line with the straight line passing through the centroid of the building structure interposed therebetween. At the building structure side, one ends are separated from each other, and at the auxiliary structure side, the other ends approach each other. The vibration damping devices are arranged in a "H" shape in plan view so that a vibration damping effect occurs in the direction passing through the centroid of the auxiliary structure. The vibration damping structure for a building structure according to Claim 1 is characterized by this.

3. Both centroids of the pair of auxiliary structures in the plane along the ground surface are arranged on a straight line passing through the centroid of the building structure. The vibration damping devices are arranged in a pair on both sides of the straight line with the straight line passing through the centroid of the building structure interposed therebetween. The arrangement mode of these vibration damping devices is such that at least the tangents to the circle centered on the centroid of the building structure are directed so that a vibration damping effect occurs in the direction passing through the centroids of the pair of auxiliary structures. The vibration damping structure for a building structure according to Claim 1 or 2 is characterized by this.

4. When the distance from the centroid of one of the auxiliary structures to the centroid of the building structure is La and the distance from the centroid of the other auxiliary structure to the centroid of the building structure is Lb, the damping performance Fa of the vibration damping device connected to one of the auxiliary structures and the damping performance Fb of the vibration damping device connected to the other auxiliary structure are set in the relationship of La×Fb = Lb×Fa. The vibration damping structure according to Claim 2 or 3 is characterized by this.

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