JP5743631B2 - Damping structure - Google Patents

Description

  The present invention relates to a vibration control structure.

  In a conventional building, the superstructure and piles, foundations, and the like are tightly connected so that the building does not rise during an earthquake. However, a seismic control structure that temporarily replaces the energy of the earthquake with potential energy by deliberately allowing the building to rise without tying the superstructure to the piles and foundations, and preventing large vibrations from being transmitted to the building. It has been proposed (see, for example, Patent Document 1).

  In such a vibration control structure, the magnitude of vibration that the building tilts and rises is almost determined by the shape and weight of the building. Therefore, for example, in a building having a large aspect ratio (height / width ratio), the building may be inclined and lifted even with relatively small vibration (earthquake motion).

Japanese Patent Laid-Open No. 2000-240315

  In view of the above, it is an object of the present invention to increase the threshold value at which the upper structure portion starts to tilt up.

The invention according to claim 1 includes an upper support portion provided in the upper structure portion, and a lower support portion provided in the lower structure portion disposed below the upper structure portion and supporting the upper support portion. A separation mechanism configured to allow the upper support portion and the lower support portion to be separated from each other in a vertical direction while restraining a relative displacement in a lateral direction between the upper support portion and the lower support portion; The upper support portion and the lower structure portion are connected via a connecting member that is deformed when a force greater than a predetermined value is applied, and the connecting member is deformed to deform the lower support portion of the upper support portion. And a connecting mechanism configured to allow floating from the upper support portion, and the separation mechanism extends downward from the upper support portion and is positioned at an opening formed in the lower support portion. An extending portion that is formed on the extending portion and is larger in the lateral direction than the opening. A flange portion projecting, that have a.

  According to the first aspect of the present invention, in the connecting / disconnecting mechanism provided with two or more laterally spaced apart due to vibration such as an earthquake, the upper support portion is lifted away from the lower support portion. As a result, the upper structure portion tilts and floats, and transmission of vibration energy such as an earthquake to the upper structure portion is reduced. If it demonstrates from another viewpoint, an upper structure part will incline and float, and the energy of vibration, such as an earthquake, is replaced by the potential energy of an upper structure part.

  Here, the upper structure portion and the lower structure portion are connected via a connecting member that is deformed when a force greater than a predetermined value is applied, and the upper support portion floats away from the lower support portion due to the deformation of the connecting member. Thus, the coupling mechanism is configured.

  Therefore, the upper support portion does not lift away from the lower support portion until a force larger than a predetermined value is applied to the connection member and the connection member is deformed.

  Therefore, the threshold value (the magnitude of vibration) at which the upper structure portion starts to be tilted and lifted is increased as compared with the structure having no connection mechanism.

  According to a second aspect of the present invention, the connecting member is constituted by a hysteretic damping member in which a load deformation curve draws a loop or a substantially loop.

  In the invention of claim 2, a vibration greater than a predetermined value is applied to the hysteretic damping member by causing the upper structure portion to be in a rocking vibration state in which the upper structure repeats rotational movement around the two separation mechanisms due to vibration such as an earthquake. Repeatedly, the hysteretic damping member repeats deformation.

  Therefore, compared to a structure in which the connecting member is composed of a member other than the historical vibration control member, the state in which the threshold value for starting the lifting of the upper support portion away from the lower support portion during the rocking vibration is maintained or substantially maintained. Maintained.

  The “load deformation curve” refers to a curve illustrating the relationship between the deformation amount of a measuring point and the magnitude of the load.

  The invention according to claim 3 is characterized in that the separating mechanism includes a lower end portion of an upper side column provided in the upper structure portion, and an upper end portion of a lower side column provided in the lower structure portion and supporting the upper side column. , Is provided between.

  In the invention of claim 3, the separation / contact mechanism is provided between the lower end portion of the upper side column provided in the upper structure portion and the upper end portion of the lower side column provided in the lower structure portion. For example, compared with the structure which provides a separating mechanism on a pile head, maintenance property is good.

  According to the present invention, it is possible to increase the threshold value at which the upper structure portion starts to be tilted and lifted compared to a structure that does not have a coupling mechanism to which the present invention is applied.

BRIEF DESCRIPTION OF THE DRAWINGS (A) which shows typically the structure to which the damping structure based on embodiment of this invention was applied is a figure of the state by which the upper structure part was supported by the lower structure part, (B) and (C) It is a figure which shows the state which the upper structure part floated from the lower structure part and inclined by rocking vibration. The separable mechanism which comprises the damping structure which concerns on embodiment of this invention is shown, (A) is a figure of the state by which the upper structure part was supported by the lower structure part, (B) is an upper structure part and a lower structure part It is a figure which shows the state which floated away from. 1 shows a vibration control structure according to a first embodiment of the present invention, wherein (A) is a view showing a state in which an upper structure portion is supported by a lower structure portion, and (B) shows that the upper structure portion is lifted away from the lower structure portion. It is a figure which shows a state. The modification of the damping structure which concerns on 1st embodiment of this invention is shown, (A) is a figure of the state by which the upper structure part was supported by the lower structure part, (B) is an upper structure part from a lower structure part. It is a figure which shows the state which floated away. The damping structure which concerns on 2nd embodiment of this invention is shown, (A) is a figure of the state by which the upper structure part was supported by the lower structure part, (B) was the upper structure part lifted away from the lower structure part. It is a figure which shows a state. It is a perspective view which shows the buckling stiffening brace which comprises the connection mechanism of the damping structure which concerns on 1st embodiment of this invention. It is explanatory drawing for demonstrating the setting method of the tensile yield axial force of a buckling stiffening brace, ((A) is a figure explaining the reaction force by a seismic force, (B) The mass (self-weight) of an upper structure part It is a figure explaining the reaction force by.

<First embodiment>
The structure 10 to which the damping structure according to the first embodiment of the present invention is applied will be described with reference to FIGS.

"overall structure"
First, the outline | summary of the whole structure of the structure 10 is demonstrated.

  As shown in FIG. 1, the structure 10 is constructed on a foundation 60 provided on the ground 50. In addition, in this embodiment, although the foundation 60 is a pile foundation, it is not limited to this. Moreover, in this embodiment, the structure 10 is made into the elongate shape in the perpendicular direction with a large aspect-ratio (ratio of height and width, tower-like ratio).

  The structure 10 includes an upper structure portion 20 and a lower structure portion 30. The lower structure unit 30 is supported by the foundation 60, and the upper structure unit 20 is supported by the lower structure unit 30. And between the upper structure part 20 and the lower structure part 30, the damping mechanism 100 to which this invention was applied is provided.

"Seismic control mechanism"
Next, the vibration control mechanism 100 will be described.

  As shown in FIG. 3, the vibration control mechanism 100 includes a separation mechanism 200 and a connection mechanism 300 disposed on both outer sides of the separation mechanism 200.

  As shown in FIG. 2 and FIG. 3, the separation mechanism 200 includes an upper support portion 210 provided on the upper side column 22 of the upper structure portion 20 and a lower portion provided on the lower side column 32 of the lower structure portion 30. Side support portion 250. If it demonstrates from another viewpoint, the pillar between the upper structure part 20 and the lower structure part 30 will be divided | segmented, and the separation / contact mechanism 200 is provided in the divided | segmented site | part.

The lower support portion 250 includes a lower attachment portion 260 and a lower separation / contact portion 270.
The lower mounting portion 260 has a configuration in which a plate member 260A and a plate member 260B are stacked and fastened by a bolt 262 and a nut 264. The plate member 260 </ b> B constituting the lower attachment portion 260 is joined to the upper end portion 32 </ b> T of the lower side column 32.

  The lower separating / connecting portion 270 is joined to the plate member 260A constituting the lower attaching portion 260, and has a cylindrical shape in which an opening 274 is formed on the upper surface 272 protruding upward.

The upper support portion 210 also has an upper attachment portion 220 and an upper separation / contact portion 230.
The upper mounting portion 220 is configured such that a plate member 220 </ b> A and a plate member 220 </ b> B are stacked and fastened with a bolt 262 and a nut 264. The plate member 220 </ b> A constituting the upper mounting portion 220 is joined to the lower end portion 22 </ b> T of the upper side column 22.

  The upper separation / contact part 230 is joined below the plate member 220 </ b> B constituting the upper attachment part 220, and has a protruding part 232 that protrudes downward. The lower surface 234 of the protruding portion 232 is disposed so as to abut on the upper surface 272 of the lower separation / contact portion 270. That is, the lower surface 234 of the protruding portion 232 of the upper separation / contact portion 230 is supported by the upper surface 272 of the lower separation / contact portion 270.

  The protruding portion 232 is provided with an extending portion 236 that extends downward. The extension part 236 is inserted into an opening part 274 formed in the upper surface 272 of the lower separation / contact part 270. In addition, a flange portion 238 that protrudes in the lateral direction is formed at the distal end portion (lower end portion) of the extending portion 236.

  The lateral width of the extending part 236 is set slightly smaller than the opening width of the opening part 274. However, the lateral width of the flange portion 238 is set larger than the opening width of the opening 274.

  Therefore, the upper support portion 210 is configured not to move relative to the lower support portion 250 in the lateral direction except for a slight gap between the extension portion 236 and the opening portion 274. However, the structure is movable in the vertical direction until the flange portion 238 comes into contact with the opening 274.

  With such a configuration, the separating mechanism 200 restrains the relative displacement in the lateral direction between the upper support portion 210 and the lower support portion 250, and the upper support portion 210 (the lower surface 234 of the protruding portion 232) and the lower side. The support portion 250 (the upper surface 272 of the lower side separation / contact portion 270) is configured to be able to be separated from / in the vertical direction. That is, in the structure 10 (see FIG. 1), the upper structure 20 (upper side column 22) and the lower structure 30 (lower side column 32) are displaced in the vertical direction while restraining the relative displacement in the horizontal direction. It has a possible structure.

  The connection mechanism 300 is disposed on both outer sides of the separation / connection mechanism 200 and connects the slab 24 of the upper structure 20 and the slab 34 of the lower structure 30. The coupling mechanism 300 has a buckling stiffening brace 302.

  As shown in FIG. 6, the buckling stiffening brace 302 includes a vibration control brace material 304 as a core material using extremely low yield point steel, and a buckling stiffening material extrapolated by the vibration control brace material 304. And a steel pipe 306. The damping brace material 304 and the steel pipe 306 are kept in an unbonded state with almost no frictional resistance. If it demonstrates from another viewpoint, the buckling stiffening brace 302 will transmit the axial damping | damping brace material 304, and the steel pipe 306 which will restrain the buckling of the damping damping brace material 304 whole at the time of compression without transmitting axial force. And is composed of. The damping brace material 304 of the buckling stiffening brace 302 is configured to yield in tension when a tensile force larger than a predetermined value set in advance is applied.

  As shown in FIG. 3, in this embodiment, the buckling stiffening brace 302 is disposed along the vertical direction. Then, one end portion of the vibration-damping brace material 304 of the buckling stiffening brace 302 is fixed to the slab 24 of the upper structure portion 20 by a fixing means 310 constituted by bolts, nuts, fixing portions and the like not shown in detail. The other end of the slab 34 of the lower structure 30 is fixed.

  As described above, the coupling mechanism 300 is applied with a force larger than a predetermined value, and the seismic brace material 304 of the buckling stiffening brace 302 is pulled and yielded, so that the lower support portion of the upper support portion 210 of the separation mechanism 200 is provided. It is configured to allow uplift from 250.

  Here, the structure 10 includes the lower surface 234 of the protruding portion 232 of the upper separation / contact portion 230 that constitutes the separation / contact mechanism 200 that is spaced apart from the upper structure portion 20 and the lower structure portion 30 in the lateral direction. The upper surface 272 of the side separation / contact portion 270 is separated as a contact (supporting point). In other words, the structure 10 uses the upper support portion 210 provided on the upper side column 22 of the upper structure portion 20 and the lower support portion 250 provided on the lower side column 32 of the lower structure portion 30 as a boundary. It is separated up and down.

The upper structure 20 and the lower structure 30 separated in the vertical direction are connected only in the vertical direction by a connection mechanism 300 (buckling stiffening brace 302).

  In the present embodiment, the aspect ratio (the ratio between the height and the width, the columnar ratio) of the upper structure portion 20 is 3 or more.

"Action and effect"
Next, functions and effects of the present embodiment will be described.

  As shown in FIG. 1 (B) and FIG. 1 (C), the upper structure part 20 is separated into two attachments / detachments with the attachment / detachment mechanism 200 provided at a distance in the lateral direction by a vibration such as an earthquake. It will be in the rocking vibration state which repeats rotational motion centering on the mechanism 200. FIG.

  As a result, as shown in FIGS. 2B and 3B, the lower surface 234 of the protruding portion 232 of the upper separation / contact portion 230 constituting the separation / contact mechanism 200 moves from the upper surface 272 of the lower separation / contact portion 270. Lift away.

  As described above, the upper structure 20 is tilted and floated to reduce the transmission of vibration energy to the upper structure 20 due to the earthquake. If it demonstrates from another viewpoint, the vibration energy by an earthquake will be replaced by the potential energy of the upper structure part 20 because the upper structure part 20 inclines and floats.

  As shown in FIG. 3, the upper structure portion 20 and the lower structure portion 30 constituting the structure 10 are connected by a connection mechanism 300. Then, a tensile force larger than a predetermined value is applied to the vibration control brace material 304 constituting the buckling stiffening brace 302 of the coupling mechanism 300, and the upper structure portion 20 becomes the lower structure by plasticizing and yielding. It floats away from the part 30.

  Therefore, the upper structure portion 20 does not float away from the lower structure portion 30 until a tensile force greater than a predetermined value is applied to the seismic brace material 304 constituting the buckling stiffening brace 302 and the yield yields. Therefore, the threshold value (the magnitude of vibration due to an earthquake) at which the upper structure 20 starts to be tilted and lifted is increased as compared with the structure without the connection mechanism 300. In other words, the timing at which the upper structure 20 starts to tilt and rise is delayed.

  Here, the upper structure portion 20 constituting the structure 10 of the present embodiment has a large aspect ratio (the ratio between the height and the width, the columnar ratio), and is set to 3 or more here. The upper structure portion 20 having a large aspect ratio is in a rocking vibration state even when the vibration is relatively small (earthquake), and the upper structure portion 20 is inclined and lifted.

  However, in the present embodiment, as described above, by providing the coupling mechanism 300, it is possible to increase the threshold value (the magnitude of vibration) at which the upper structure portion 20 starts to tilt and lift, and relatively small vibration (seismic motion). In the case of), lifting is prevented.

  Further, by adjusting (setting) the force (predetermined value) at which the buckling stiffening brace 302 is plasticized and yields in tension, the threshold value (the magnitude of vibration) at which the upper structure 20 starts to be lifted is easily adjusted. be able to. In other words, it is possible to control the timing at which the upper structure portion 20 starts to tilt up.

  Further, since the steel pipe 306 that does not transmit axial force constrains the buckling of the entire damping vibration brace material 304 during compression, the buckling stiffening brace 302 constrains the hysteretic type in which the load deformation curve draws a loop or a substantially loop. It is a seismic member. Therefore, even if the upper structure 20 is in a rocking vibration state where the upper structure 20 repeats the rotational movement around the two separating / connecting mechanisms 200 (see FIGS. 1B and 1C), the buckling stiffening brace 302 is Repeat tensile yielding. Therefore, during the rocking vibration, the state in which the threshold value for starting the upper structure portion 20 from the lower structure portion 30 and starting to float is maintained or substantially maintained.

  As shown in FIGS. 2A and 3A, when the upper structure 20 is not inclined and lifted from the lower structure 30, the protruding portion 232 of the upper separating portion 230 constituting the separating mechanism 200 is used. The shearing force is transmitted by the frictional resistance between the lower surface 234 of the lower surface and the upper surface 272 of the lower separating portion 270.

  On the other hand, as shown in FIGS. 2 (B) and 3 (B), in a state where the upper structure portion 20 is inclined and lifted from the lower structure portion 30, the protruding portion of the upper separation portion 230 that constitutes the separation mechanism 200. The shearing force is transmitted when 232 abuts against the opening 274 of the upper surface 272 of the lower separation / contact portion 270. If it demonstrates from another viewpoint, the upper structure part 20 is restrained by the horizontal displacement with respect to the lower structure part 30. FIG.

  Even if a greater seismic force than assumed is applied, the flange portion 238 of the protruding portion 232 of the upper separating portion 230 abuts on the opening 274 of the upper surface 272 of the lower separating portion 270. It is possible to prevent the upper structure portion 20 from being inclined more than a preset angle.

  Further, in the present embodiment, the separation mechanism 200 includes a lower end portion 22T of the upper side column 22 provided in the upper structure portion 20 and an upper end portion 32T of the lower side column 32 provided in the lower structure portion 30. It is provided in between. Therefore, for example, maintainability is better than a configuration in which a separation / contact mechanism is provided between the foundation 60 (pile head) and the structure 10. Or compared with the structure which provides a separation mechanism (contact) in underground parts, such as an underground outer wall, for example, it becomes difficult to receive the influence on the floating by friction with the surrounding ground.

  In the present embodiment, the plate member 220A and the plate member 220B of the upper mounting portion 220 are bolted, and similarly, the plate member 260A and the plate member 260B of the lower mounting portion 260 are bolted. Therefore, the plate members 220A and 260A and the plate members 220B and 260B can be easily exchanged by separating them.

"Setting method of tensile yield axial force of buckling stiffening brace (connecting member) 302"
Next, an example of a method for setting the tensile yield axial force of the buckling stiffening brace (connecting member) 302 will be described with reference to FIG.

  Assume that the mass mg of the upper structure portion 20 of the structure 10 is uniformly distributed, and further assume that the point of action of the seismic force P is the center of the upper structure portion 20. Then, assuming that the fulcrum (separation mechanism 200) is fixed, as shown in FIG. 7A, the fulcrum reaction force when receiving the seismic force P in the horizontal direction at the center of the upper structure portion 20. V is expressed by the following equation. Note that h is the height of the upper structure portion 20, and w is the lateral width of the upper structure portion 20 (in this example, the interval of the separation mechanism 200).

h / 2 · P = wV
V = h / (2w) · P (1)

First, a configuration without the buckling stiffening brace 302 will be considered.
As shown in FIG. 7 (B), the fulcrum reaction force due to the weight (self-weight) mg of the upper structure portion 20 is mg / 2, so that floating occurs when V = mg / 2.
Therefore, substituting this V = mg / 2 into the equation (1),

h / (2w) · P = mg / 2
P = (w / h) · mg

It becomes.
If the aspect ratio (columnar ratio) of the upper structure portion 20 is 5, h / w = 5,

P = (1/5) mg
= 0.2mg

It becomes.
That is, when the aspect ratio (tower-like ratio) is 5, uplift occurs when the seismic force P is 0.2 times the weight mg of the upper structure 20. Thus, in the case of the configuration in which the buckling stiffening brace 302 is not provided, the rising threshold is substantially determined by the aspect ratio (tower-like ratio) of the upper structure portion 20.

Next, the case of a configuration (this embodiment) provided with a buckling stiffening brace 302 will be considered.
Assuming that the tensile yielding axial force of the buckling stiffening brace 302 is Ny, lifting occurs when V = mg / 2 + Ny.

Therefore, substituting this V = mg / 2 + Ny into the equation (1),
h / (2w) · P = mg / 2 + Ny
Ny is summarized and P = Cmg.
Ny = (h / w · C-1) · mg / 2
It becomes.

  To set the upper structure 20 with an aspect ratio (tower-like ratio) of 5 so as to float with an earthquake force P of 0.25 times the weight mg (C = 0.25),

Ny = (5 × 0.25−1) · mg / 2
= 0.125mg

And it is sufficient.
In this way, by adjusting the cross section of the buckling stiffening brace 302 and setting the tensile yield axial force Ny, the upper structure 20 is lifted by the seismic force P at a predetermined magnification of weight mg. That is, it can be set to float at a predetermined threshold.

  It is also possible to adjust the aspect ratio by adjusting the interval W between adjacent contacts.

"Modification"
Next, a modified example of the coupling mechanism of the present embodiment will be described with reference to FIG.

  In the embodiment described above, the buckling stiffening brace 302 is disposed along a substantially vertical direction (see FIG. 3). On the other hand, in the coupling mechanism 301 of the modified example shown in FIG. 4, the buckling stiffening brace 302 is disposed obliquely.

  By arranging the buckling stiffening brace 302 diagonally in this way, the length of the buckling stiffening brace 302 can be reduced even if the installation space is narrow (in this embodiment, even if the distance between the slab 24 and the slab 34 is narrow). Can be set longer.

<Second embodiment>
Next, a structure to which the vibration control structure according to the second embodiment of the present invention is applied will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the member same as 1st embodiment, and the overlapping description is abbreviate | omitted. The first embodiment is different from the second embodiment only in the coupling mechanism, and the other configurations including the separation / contact mechanism 200 are the same. Therefore, only the coupling mechanism will be described below.

  As shown in FIG. 5, the coupling mechanism 400 according to the second embodiment includes a column 410 and a vibration control steel plate 420.

  The support column 410 has an upper end 412 bonded to the slab 24 of the upper structure portion 20. In this embodiment, the damping steel plate 420 is made of a plate-like extremely low yield point steel. One end surface 422 of the damping steel plate 420 is joined to the side surface of the lower side column 32 of the lower structure portion 30. Further, the other end surface 424 of the damping steel plate 420 is joined to the side surface 414 of the lower end portion of the column 410.

  Accordingly, the coupling mechanism 400 applies a force greater than a predetermined value and shear-deforms the damping steel plate 420 so as to allow the lifting from the lower support portion 250 of the upper support portion 210 of the separation / connection mechanism 200. It is configured.

"Action and effect"
Next, functions and effects of the present embodiment will be described.

  As shown in FIG. 1, similarly to the first embodiment, the transmission of vibration energy due to an earthquake to the upper structure 20 is reduced by the upper structure 20 being inclined and floating.

  As shown in FIG. 4, the upper structure portion 20 and the lower structure portion 30 constituting the structure 10 are connected by a connecting mechanism 400. Then, a force larger than a predetermined value is applied to the vibration control steel plate 420 constituting the coupling mechanism 400, and the upper structure portion 20 is lifted away from the lower structure portion 30 by plasticizing and shearing deformation.

  Therefore, the upper structure portion 20 does not float away from the lower structure portion 30 until a force greater than a predetermined value is applied to the damping steel plate 420 and shear deformation occurs. Therefore, the threshold value (the magnitude of vibration due to the earthquake) at which the upper structure 20 starts to be lifted is increased compared to a structure that does not include the coupling mechanism 400.

  The damping steel plate 420 is a hysteretic damping member whose load deformation curve draws a loop or a substantially loop. Therefore, even if the upper structure 20 is in a rocking vibration state in which the rotational movement is repeated around the two separating / connecting mechanisms 200 (see FIGS. 1B and 1C), the damping steel plate 420 is subjected to shear deformation. repeat. Therefore, during the rocking vibration, the state in which the threshold value for starting the upper structure portion 20 from the lower structure portion 30 and starting to float is maintained or substantially maintained.

<Others>
The present invention is not limited to the above embodiment.

  For example, the coupling mechanism and the coupling member may be mechanisms and members other than the above embodiment. For example, a hysteretic damper such as a friction damper may be used. In short, the upper structure portion and the lower structure portion are connected via a connecting member that is deformed when a force greater than a predetermined value is applied, and the upper support portion is lifted from the lower support portion by the deformation of the connecting member. Any coupling mechanism configured to allow ascent is acceptable.

  If it demonstrates from another viewpoint, the threshold value should just be controlled by installing the connection member (connection mechanism) which has proof stress and toughness required in parallel with a separation / connection mechanism.

  Further, for example, the separation / contact mechanism may be a mechanism other than the above embodiment. For example, the structure shown in FIG. 2 may be arranged upside down. That is, the upper side separating part 230 and the lower side separating part 270 may be arranged upside down.

  Or the fitting structure of the concave and convex of the depth which can restrain the movement of a horizontal direction as described in patent 380394 and Unexamined-Japanese-Patent No. 2000-240315 may be sufficient. The concave and convex forms are not limited. A hemispherical shape, a pyramidal shape, a polygonal pyramid shape, and a composite shape thereof may be used. Further, it may be a retaining wall or a Kanzashi-shaped stopper for restraining the outer periphery of the building or the inside of the frame structure (the underground outer wall 21 in the embodiment of FIG. 5 of Japanese Patent No. 380394 and Japanese Patent Laid-Open No. 2000-240315 is also used reference).

  For example, in the above embodiment, the separation mechanism 200 includes the lower end portion 22T of the upper side column 22 provided in the upper structure portion 20 and the upper end portion 32T of the lower side column 32 provided in the lower structure portion 30. However, the present invention is not limited to this. A connecting / disconnecting mechanism (contact point) may be provided between the foundation 60 and the structure 10 or an underground outer wall surrounded by a mountain retaining base (see, for example, Japanese Patent No. 380394 and Japanese Patent Laid-Open No. 2000-240315). ). For example, when providing between the foundation 60 and the structure 10, the structure 10 becomes an upper structure part and the foundation 60 becomes a lower structure part.

  Further, a cushioning material for reducing the impact force of the upper structure 20 in the vertical direction is applied between the contacts (in the above embodiment, the lower surface 234 of the protruding portion 232 of the upper separating portion 230 and the upper surface 272 of the lower separating portion 270). Between the two). Although the material and shape of the buffer material are not particularly limited, for example, a laminated rubber sheet or a lead plate can be used.

  In addition, for example, two separation / contact mechanisms (contact points between the upper structure portion and the lower structure portion) are provided at intervals in the left-right direction in a side view, but the present invention is not limited to this. In side view, three or more may be provided at intervals in the left-right direction.

  Further, the upper structure portion 20 and the lower structure portion 30 are connected to each other by an energy absorbing member such as a viscous damper (different from the connection mechanism) in addition to the connection mechanism to which the present invention is applied. The response (vibration) of 20 may be reduced.

  The viscous damper generates a reaction force (damping force) in proportion to the speed or exponential of the speed. Therefore, no reaction force is generated when starting to lift (when the speed is zero). Therefore, even if the upper structure portion and the lower structure portion are connected only by the energy absorbing member that absorbs the energy after the lifting such as the viscous damper without the connecting mechanism to which the present invention is applied, the upper structure portion is inclined and lifted. There is no effect of increasing the starting threshold value (almost no effect).

  Further, for example, in the above-described embodiment, the structure 10 has an elongated shape in the vertical direction with a large aspect ratio (ratio of height to width, tower-like ratio), but is not limited thereto. For example, the present invention can be applied to a structure having a small aspect ratio and a structure having an aspect ratio of 1 or less (horizontally long). Further, for example, the present invention can be applied to a multi-layer brace structure.

For example, in the said embodiment, the connection mechanism 300 was arrange | positioned in the both sides of the separation / contact mechanism 200 in the side view, but it is not limited to this. For example, the coupling mechanism 300 may be disposed only on one side of the separation / connection mechanism 200. Alternatively, a plurality of connection mechanisms 300 may be arranged side by side on the outside of the separation / connection mechanism 200.
Further, in a plan view, a plurality of connection mechanisms 300 may be arranged in a circular shape so as to surround the periphery of the separation / connection mechanism 200.

  The above-described plurality of embodiments and modified examples can be implemented in combination as appropriate. Furthermore, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 10 Structure 20 Upper structure part 22 Upper side pillar 22T Lower end part 30 Lower structure part 32 Lower side pillar 32T Upper end part 200 Separation mechanism 210 Upper support part 250 Lower support part 300 Connection mechanism 301 Connection mechanism 302 Buckling stiffening brace (Coupling mechanism, coupling member, hysteretic damping member)
310 Fixing means (connection mechanism)
400 connection mechanism 410 support (connection mechanism)
420 Damping steel plate (coupling mechanism, coupling member, hysteretic damping member)

Claims (3)

An upper support portion provided in the upper structure portion; and a lower support portion provided in a lower structure portion disposed below the upper structure portion and supporting the upper support portion, and the upper support portion. A separable contact mechanism configured such that the upper support part and the lower support part are separable in the vertical direction while restraining the relative displacement in the lateral direction between the lower support part and the lower support part,
The upper structure portion and the lower structure portion are connected via a connecting member that is deformed when a force greater than a predetermined value is applied, and the connecting member is deformed so that the lower support portion of the upper support portion is deformed. A coupling mechanism configured to allow the lifting of
Equipped with a,
The separation / contact mechanism is:
An extension part extending downward from the upper support part and located in an opening formed in the lower support part;
A flange portion formed in the extending portion and projecting in a lateral direction larger than the opening portion;
Seismic control structure that has a. The connecting member is constituted by a hysteretic damping member in which a load deformation curve draws a loop or a substantially loop.
The vibration control structure according to claim 1. The separation / contact mechanism is provided between a lower end portion of an upper side column provided in the upper structure portion and an upper end portion of a lower side column provided in the lower structure portion and supporting the upper side column. Yes,
The vibration control structure according to claim 1 or claim 2.

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