JP2006257674A - Vibration control structure for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control structure for a building, which effectively protects a skeleton of the building from being destroyed due to dynamic load, and positively generates strength against static load. <P>SOLUTION: In the vibration control structure for the building, a brace 4 of a framework 1 has a viscoelastic damper 9 and a frication damper 10 serially arranged thereon. A fixed plate 6 of the viscoelastic damper 9 has a stopper pin 12 arranged thereon, and a movable plate 8 has a slot 13 formed therein, in which the stopper pin 12 is loosely inserted. When vibration occurs, shear deformation of a viscoelastic body 11 of the viscoelastic damper 9 generates a damping action, while at the time of application of excessive load, a fixed plate 7 and the movable plate 8 are relatively moved in a longitudinal direction in the friction damper 10 to generate a friction damping action. On the other hand, with respect to static load such as wind, by virtue of the shear deformation of the viscoelastic body 11, the stopper pin 12 abuts on the slot 13, which brings generation of strength. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vibration control structure provided in a building such as a house for attenuating vibration caused by an external force such as an earthquake or wind.

As a vibration control structure of a building, it is composed of a plurality of vibration control members such as plates and cylinders and a viscoelastic body bonded between the vibration control members in a frame frame composed of columns and horizontal members. A structure in which a viscoelastic damper is incorporated as, for example, a brace is known. Thereby, at the time of vibration, a vibration damping action can be obtained by shear deformation of the viscoelastic body accompanying the operation of the damping member in the opposite direction.
However, in this case, if a load exceeding energy that can be absorbed by the viscoelastic damper is applied, the viscoelastic damper may be destroyed.
Therefore, as disclosed in Patent Documents 1 to 3, a friction damper is used in which a plurality of sliding members are pressed against each other by clamping means such as bolts and a friction damping action is generated by the movement of the sliding members in the opposite direction. Thus, a structure connecting to a viscoelastic damper is conceivable. According to such a composite damper, the viscoelastic damper can be protected by operating the friction damper when a predetermined load is applied within the design maximum proof stress of the housing.

JP-A-9-268802 Japanese Patent Laid-Open No. 10-37515 JP 2001-342749 A

  By the way, in addition to a dynamic load due to an earthquake or the like, a static load due to wind may be applied to the building. Such a static load cannot generate an opposing stress in a viscoelastic damper having a large stress relaxation, and allows an increase in displacement. This phenomenon is the same even in the case of a composite damper. For a static load in one direction, only the viscoelastic damper undergoes creep deformation. It does not function and eventually cannot withstand a static load.

  Therefore, the present invention can effectively prevent the destruction of the housing against a dynamic load due to an earthquake or the like, and can prevent an increase in displacement with a viscoelastic damper against a static load due to a wind or the like. An object of the present invention is to provide a building seismic control structure capable of generating a suitable proof stress.

In order to achieve the above object, the invention according to claim 1 corresponds to the shear deformation of the viscoelastic body between the damping members of the viscoelastic damper to a load smaller than a predetermined load on which the friction damper operates. A stopper mechanism is provided which regulates with a predetermined displacement.
In addition to the object of the first aspect, the invention according to claim 2 includes a pin member provided on any one of the vibration control members on the operating side and a second member, in order to simply configure the stopper mechanism. It is made into the structure which is provided in the vibration control member of this operation | movement side along the displacement direction of a viscoelastic body, and consists of a long hole in which a pin member loosely inserts.
In addition to the object of the first or second aspect, the invention described in claim 3 is configured so that the composite damper is arranged vertically in the shaft frame in order to rationally configure a composite damper having a plurality of viscoelastic dampers. A pair of viscoelastic dampers arranged so as to be diagonal and symmetrical in the vertical axis within each equally divided frame surface, and one operating side arranged at the middle part of the column on the intersection point of both viscoelastic dampers The upper and lower viscoelastic dampers are formed on this sliding member, and one friction damper having a column connected to the other sliding member on the operating side.
According to a fourth aspect of the present invention, in addition to the object of the first or second aspect, in order to rationally configure a composite damper having a plurality of viscoelastic dampers, the composite damper is attached to the shaft assembly from the center of the shaft assembly frame. Four viscoelastic dampers arranged radially toward the four corners of the frame and the center of the frame frame, and the upper and lower viscoelastic dampers on either the left or right side of the sliding member on one operation side, The sliding member on the other operation side is formed from one friction damper in which upper and lower viscoelastic dampers on the other side are connected.

According to the first aspect of the present invention, the friction damper can be reliably operated with respect to an excessive load within the design maximum proof stress during vibration due to an earthquake. Therefore, destruction of a frame (shaft frame) can be prevented and a suitable vibration control function can be maintained, and the reliability and durability are excellent. On the other hand, with respect to a static load caused by wind or the like, the viscoelastic damper can surely generate a proof stress by a stopper mechanism to counter the static load.
According to the second aspect of the present invention, in addition to the effect of the first aspect, the stopper mechanism can be easily configured by the pin member and the long hole.
According to the third and fourth aspects of the present invention, in addition to the effect of the first or second aspect, a plurality of viscoelastic dampers can share a single friction damper, which simplifies the structure and is advantageous in terms of cost. . Also, the friction damper can be operated stably.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each embodiment, the same components as those in the previous embodiment are denoted by the same reference numerals, and redundant description is omitted.
<< Form 1 >>
FIG. 1 is a front view of a frame frame used in a lightweight steel frame house. The frame frame 1 includes a pair of left and right columns 2 and 2 and a pair of columns 2 and 2 that are installed between upper ends and lower ends. The horizontal members 3, 3, and the braces 4 that are installed diagonally between the joints of the pillar 2 and the horizontal member 3. As shown in FIGS. 2 (A) and 2 (B), the brace 4 includes two fixed plates 6 and 7 which are fixed to the gusset plates 5 and 5 joined to the joint portion on the same surface, and the fixing thereof. A pair of movable plates 8 and 8 are arranged so that the free end sides of the plates 6 and 7 are sandwiched from both sides in the thickness direction. A viscoelastic damper 9 is provided on one fixed plate 6 side, and the other fixed side is fixed. Friction dampers 10 are respectively provided on the plate 7 side to constitute a composite damper.

  First, the viscoelastic damper 9 is a pair of thin plate-like viscoelastic bodies 11 between the fixed plate 6 and the movable plates 8 and 8 as the vibration control members, and the plates 6 and 8, and the opposing surfaces are bonded to each other. , 11. In addition, a stopper pin 12 serving as a pin member of the stopper mechanism is fixed orthogonally to a central portion of the fixed plate 6 in the longitudinal direction of the viscoelastic body 11, and both ends are formed in the movable plates 8 and 8 in the longitudinal direction. The pair of elongated holes 13 and 13 are loosely inserted. In a normal state, a clearance C <b> 1 is generated between the stopper pin 12 and the long hole 13 in the longitudinal direction of the movable plate 8. Therefore, the fixed plate 6 and the movable plates 8 and 8 are moved back and forth in the longitudinal direction until the stopper pin 12 contacts the end of the long holes 13 and 13 when the viscoelastic bodies 11 and 11 are sheared and deformed in the longitudinal direction. Relative movement is possible.

The friction damper 10 includes a fixed plate 7 and movable plates 8 and 8 as sliding members, a friction plate 14 made of cast iron fixed to a surface of each movable plate 8 facing the fixed plate 7, both plates 7 and 8, and It is formed of a fastening bolt 15 as a clamping means that penetrates the friction plate 14 and is fastened with a predetermined clamping force by a nut from the outside of each of the movable plates 8 and 8. Further, the penetration portion of the fastening bolt 15 in the fixed plate 7 also becomes a long hole 16 along the longitudinal direction, and normally, between the fastening bolt 15 and the long hole 16 in the longitudinal direction of the movable plate 8, The clearance C2 is set to be generated before and after. This clearance C <b> 2 is larger than the clearance C <b> 1 between the stopper pin 12 and the long hole 13 in the viscoelastic damper 9.
Therefore, the fixed plate 7 and the movable plates 8 and 8 are tightened when a predetermined load (sliding load set by the clamping force of the tightening bolt 15) within the design maximum proof stress of the frame assembly 1 is applied. The attached bolts 15 can be relatively moved back and forth in the longitudinal direction until they come into contact with the ends of the long holes 16. In the viscoelastic damper 9, the load at which the stopper pin 12 abuts the elongated hole 13 and the displacement is restricted is smaller than the sliding load of the friction damper 10.

  In the axial frame 1 configured as described above, when an external force in the horizontal direction is intermittently applied along the frame surface direction during vibration due to an earthquake, the tensile force and compressive force in the axial direction are applied to the brace 4. And are added alternately. Then, as shown in FIG. 2 (C), the viscoelastic bodies 11 and 11 are shear-deformed by the reciprocal movement of the fixed plate 6 and the movable plates 8 and 8 in the longitudinal direction, thereby absorbing energy and performing a damping action. Cause it to occur. At this time, the stopper pin 12 does not contact the end of the long hole 13.

When an excessive load is applied in a dynamic large-scale earthquake, the stopper pin 12 that has moved relative to the clearance C1 due to the shear deformation of the viscoelastic bodies 11 and 11 is provided with a long hole 13 as shown in FIG. The viscoelastic bodies 11 and 11 are restricted from further shear deformation. When the load in the same direction further increases and exceeds the sliding load, the fixed plate 7 and the movable plates 8 and 8 move in the longitudinal direction in the friction damper 10 as shown in FIG. The operation of the friction damper 10 exerts a friction damping effect and prevents the shaft frame 1 from being broken.
Here, the action of the friction damper 10 operating after the stopper mechanism of the viscoelastic damper 9 is operated for an excessive load is described. However, depending on the frequency of the load, the stopper mechanism of the viscoelastic damper 9 is described. In some cases, the friction damper 10 may operate before the operation of the frictional damper 10 (before the stopper pin 12 contacts the end of the long hole 13). The same applies to other forms described later.

  On the other hand, when a horizontal external force is applied as a static load to the frame 1 by wind or the like, the viscoelastic damper 9 causes the viscoelastic bodies 11 and 11 to undergo shear deformation as the static load increases. The amount of displacement is gradually increased. However, when the stopper pin 12 comes into contact with the end of the long hole 13 as shown in FIG. 2 (D), further displacement is restricted, so that a proof stress can be generated for the subsequent load. At this time, the friction damper 10 does not operate unless the sliding load is exceeded.

As described above, according to the frame assembly 1 of the first aspect, the shear deformation of the viscoelastic body 11 between the fixed plate 6 and the movable plate 8 of the viscoelastic damper 9 causes the friction damper 10 to operate. By providing a stopper mechanism that regulates with a predetermined displacement corresponding to a load smaller than the load, the friction damper 10 can be reliably protected against an excessive load within the design maximum proof strength of the frame assembly 1 when the vibration is caused by an earthquake. Can be operated. Therefore, destruction of the shaft frame 1 can be prevented and a suitable vibration control function can be maintained, and the reliability and durability are excellent. On the other hand, with respect to a static load caused by wind or the like, the viscoelastic damper 9 can surely generate a proof stress by the stopper mechanism to counter the static load.
In addition, the stopper mechanism can be easily configured by employing the stopper pin 12 and the long hole 13.

<< Form 2 >>
In the frame frame 20 shown in FIG. 3, gusset plates 21 and 21 are fixed in parallel on the frame surface side at the central portion of the upper and lower horizontal members 3 and 3, and the gusset plates 21 and 21 are connected to the gusset plates 21 and 21 in the left-right direction. Two wide and short fixing plates 22 and 23 are fixed on the same surface in the vertical direction. The movable plates 24 and 24 are also arranged to sandwich the free end sides of the fixed plates 22 and 23 from the front and rear at the approximate center of the frame surface with the same left-right width as the fixed plates 22 and 23, and viscoelastic upward. The damper 25 is provided with a friction damper 26 on the lower side to constitute a composite damper that is installed vertically within the shaft frame 20.

As shown in FIG. 4, the viscoelastic damper 25 is bonded to the opposing surfaces between the fixed plate 22 and the movable plates 24 and 24 that are the vibration control members and the plates 22 and 24 as in the first embodiment. A stopper mechanism having viscoelastic bodies 27 and 27 and comprising a stopper pin 28 fixed to the fixed plate 22 orthogonally and a long hole 29.29 of the movable plates 24 and 24 into which the stopper pin 28 is loosely inserted. I have. Here, the long holes 29 are formed in the left-right direction so that clearances C1 are formed on the left and right sides of the stopper pin 28, respectively. This clearance C1 is also a displacement corresponding to a load smaller than the sliding load of the friction damper 26 set to be equal to or less than the design maximum proof stress of the frame frame 20 as in the first embodiment.
Similarly, the friction damper 26 includes a movable plate 24 and a fixed plate 23 which are sliding members, and cast iron friction plates 30 and 30 fixed to the surfaces of the movable plates 24 and 24 facing the fixed plate 23. A clamping bolt 31 is formed as a clamping means that penetrates the plates 23 and 24 and the friction plates 30 and 30 and is fastened with a predetermined clamping force by a nut from the outside of each of the movable plates 24 and 24. The long holes 32 of the fixing plate 23 through which the fastening bolts 31 pass are also formed in the left-right direction, and clearances C2 larger than the clearance C1 of the viscoelastic damper 25 are respectively formed on the left and right sides of the fastening bolts 31. Yes.

In the frame frame 20 configured as described above, when an external force in the horizontal direction is intermittently applied along the frame surface direction at the time of vibration due to an earthquake, the upper and lower horizontal members 3 are deformed to shift in the opposite horizontal direction. It occurs alternately. Then, as shown in FIG. 5A, the viscoelastic body is caused by the movement in the opposite horizontal direction between the fixed plate 22 and the movable plates 24, 24 integrated with the lower fixed plate 23 via the friction damper 26. 27 and 27 are sheared to absorb energy and cause a damping action. At this time, the stopper pin 28 does not come into contact with the end of the long hole 29.
When an excessive load is applied in a dynamic large-scale earthquake, as shown in FIG. 5B, the stopper pin 28 that has moved the clearance C1 in the horizontal direction relative to the shearing deformation of the viscoelastic bodies 27, 27. Abuts against the end of the long hole 29 and restricts further shear deformation of the viscoelastic bodies 27, 27. When the load in the same direction further increases and exceeds the sliding load, the fixed plate 23 and the movable plates 24 and 24 move in the horizontal direction in the friction damper 26 as shown in FIG. Causes a dampening effect. The operation of the friction damper 26 prevents the frame assembly 20 from being broken.

  On the other hand, when a horizontal external force is applied as a static load to the frame frame 20 by wind or the like, the viscoelastic damper 25 shears and deforms the viscoelastic bodies 25 and 25 as the static load increases. The amount of displacement is gradually increased. However, when the stopper pin 28 comes into contact with the end of the long hole 29 as shown in FIG. 5B, further displacement is restricted, so that a proof stress can be generated for the subsequent load. At this time, the friction damper 26 does not operate unless the sliding load is exceeded.

  Thus, also in the frame frame 20 of the second aspect, the same effect as that of the first aspect can be obtained. That is, at the time of vibration due to an earthquake, the friction damper 26 can be reliably operated against an excessive load within the design maximum proof stress of the frame frame 20. Therefore, destruction of the shaft frame 20 can be prevented and a suitable vibration control function can be maintained, and the reliability and durability are excellent. On the other hand, with respect to a static load caused by wind or the like, the viscoelastic damper 25 can reliably resist the static load by generating a proof stress by the stopper mechanism.

<< Form 3 >>
The frame frame 40 shown in FIG. 6 divides the frame surface into two equal parts by a horizontal center bar 41, and a pair of braces 42 and 42 are symmetrical with respect to the vertical axis in the respective diagonal lines in each divided frame. Thus, the so-called K brace is arranged. B and B are beams to which the upper and lower ends of the frame frame 40 are respectively fixed. Each brace 42 is arranged in parallel with a long plate-like fixing plate 44 joined to a joint portion between the pillar 2 and the horizontal member 3 via a gusset plate 43 and overlapping the fixing plate 44. A viscoelastic damper including a movable plate 45 and a viscoelastic body 46 bonded to the opposing surfaces is formed between the plates 44 and 45 serving as vibration control members, and is connected to the fixed plate 44 in an orthogonal manner. The stopper pin 47 is passed through the long hole 48 provided in the longitudinal direction of the movable plate 45 to form a stopper mechanism, and the displacement restriction similar to the first and second embodiments can be performed within the clearance C1.

One friction damper 49 here is provided at an intermediate portion of the column 2 on the intersection side of both braces 42 and 42 to constitute a composite damper. That is, as shown in FIG. 7, the plate-like connecting bar 50 to which the ends of the movable plates 45, 45 of the middle rail 41 and the braces 42, 42 are fixed, and the bolts that hold the connecting bar 50 from the front and the back. A pair of connecting plates 51, 51 as one sliding member connected in parallel with each other by 52, 52, .., and located between the connecting plates 51, 51, and a frame surface at an intermediate portion of the left pillar 2 The core plate 53 as the other sliding member fixed in parallel, the friction plates 54 and 54 fixed on the side of each connecting plate 51 facing the core plate 53, and the connecting plate 51 from the outside of each connecting plate 51. , 51, friction plates 54, 54, and fastening bolts 55 as clamping means that are fastened through the core plate 53. 56 and 56 are surface pressure spacers interposed between the heads of the tightening bolts 55 and the nuts on the outside of the connecting plates 51 and 51.
In addition, a penetration portion of the fastening bolt 55 in the core plate 53 is a long hole 57 that is long in the vertical direction. The clearance C2 between the tightening bolt 55 and the end of the long hole 57 is also set to be larger than the clearance C1 between the stopper pin 47 and the long hole 48 in the brace 42, and the load and friction at which the stopper mechanism of the viscoelastic damper operates. The magnitude relationship with the sliding load of the damper 49 is the same as that of the said form.

Even in the frame frame 40 configured as described above, when the vibration is caused by the earthquake, the upper and lower braces 42 and 42 are alternately applied with the tensile force and the compressive force in the longitudinal direction, and the viscoelastic body 46 is moved in the longitudinal direction. By shear deformation, energy is absorbed and a damping action is generated.
When an excessive load is applied in a dynamic large-scale earthquake, the stopper pin 47 that has moved relative to the clearance C1 by the shear deformation of the viscoelastic body 46 comes into contact with the end of the long hole 48, and viscoelasticity beyond that. The shear deformation of the body 46 is restricted. When the load in the same direction further increases and exceeds the sliding load, the connecting plates 51 and 51 fixed to the movable plates 45 and 45 are moved up and down by the guide of the long hole 57 to the tightening bolt 55 in the friction damper 49. It moves in the direction (when the frame 40 is deformed to the right in FIG. 6, it moves upward, and when it is deformed to the left, it moves downward) to produce a friction damping action. The operation of the friction damper 49 prevents the shaft frame 40 from being broken.

  On the other hand, when a horizontal external force is applied as a static load to the frame 40 by wind or the like, the viscoelastic damper of the brace 42 causes the viscoelastic body 46 to undergo shear deformation as the static load increases. The amount of displacement is gradually increased. However, when the stopper pin 47 comes into contact with the end portion of the long hole 48, further displacement is suppressed, so that a proof stress can be generated against the subsequent load. At this time, the friction damper 49 does not operate unless the sliding load is exceeded.

Thus, also in the frame frame 40 of the above-described form 3, the friction damper 49 can be reliably operated against an excessive load within the design maximum proof stress of the frame frame 40 at the time of vibration due to an earthquake. Therefore, destruction of the shaft frame 40 can be prevented and a suitable vibration control function can be maintained, and the reliability and durability are excellent. On the other hand, with respect to a static load caused by wind or the like, the viscoelastic damper can surely generate a proof stress by a stopper mechanism to counter the static load.
In particular, in this embodiment, the composite damper is a pair of viscoelastic dampers (braces 42) arranged diagonally in each frame plane that bisects the inside of the frame 40 and vertically symmetrical. The upper and lower braces 42 are connected to the connecting plate 51, and the friction plate 49 is connected to the core plate 53. Since one friction damper 49 can be shared by two viscoelastic dampers, the structure is simplified, which is advantageous in terms of cost. Further, the friction damper 49 can be operated stably.

<< Form 4 >>
The shaft frame 60 shown in FIG. 8 has four braces 42, 42,... Having the same viscoelastic damper as in the third embodiment arranged radially from the center of the shaft frame 60 toward the four corners. Here, a friction damper 49 similar to that shown in FIGS. 6 and 7 is shared to form a composite damper. That is, as shown in FIG. 9, the upper and lower braces 42 and 42 and the middle rail 41 positioned on the right side in the frame are connected to the connecting bar 50 and the connecting plates 51 and 51 serving as one sliding member, and the friction plates 54 and 54. The clamping plate 55 or the like as a clamping means is provided. The core plate 61 as the other sliding member is provided with the fixing plates 45 and the middle rails of the upper and lower braces 42 and 42 located on the left side in the frame. 62 is fixed. The relationship between the clearances C1 and C2 and the magnitude relationship between the load at which the stopper mechanism of the viscoelastic damper operates and the sliding load of the friction damper are the same as in the other embodiments.
Therefore, also in this frame frame 60, during vibration due to an earthquake, a tensile force and a compressive force are alternately applied to each of the pair of braces 42, 42 located on the diagonal line, and the viscoelastic body 46 is sheared in the longitudinal direction. By deforming, it absorbs energy and causes a damping action.

  When an excessive load is applied in a dynamic large-scale earthquake, the stopper pin 47 that has moved relative to the clearance C1 by the shear deformation of the viscoelastic body 46 comes into contact with the end of the long hole 48, and viscoelasticity beyond that. The shear deformation of the body 46 is suppressed. When the load in the same direction further increases and exceeds the sliding load, the connecting plates 51 and 51 fixed to the movable plates 45 and 45 are moved up and down by the guide of the long hole 57 to the tightening bolt 55 in the friction damper 49. It moves in the direction (when the frame 60 is deformed to the right in FIG. 8, it moves upward, and when it is deformed to the left, it moves downward) to produce a friction damping action. The operation of the friction damper 49 prevents the shaft frame 60 from being broken.

  On the other hand, when a horizontal external force is applied as a static load to the frame 60 by wind or the like, the viscoelastic damper of the brace 42 causes the viscoelastic body 46 to undergo shear deformation as the static load increases. The amount of displacement is gradually increased. However, when the stopper pin 47 comes into contact with the end portion of the long hole 48, further displacement is suppressed, so that a proof stress can be generated against the subsequent load. At this time, the friction damper 49 does not operate unless the sliding load is exceeded.

Thus, also in the frame frame 60 of the above-described form 4, the friction damper 49 can be reliably operated against an excessive load within the design maximum proof stress of the frame frame 60 during vibration due to an earthquake. Therefore, destruction of the shaft frame 60 can be prevented and a suitable vibration control function can be maintained, and the reliability and durability are excellent. On the other hand, with respect to a static load caused by wind or the like, the viscoelastic damper can surely generate a proof stress by a stopper mechanism to counter the static load.
In this embodiment as well, the composite damper is arranged at the center of the frame frame 60 and the four viscoelastic dampers (braces 42) arranged radially from the center of the frame frame 60 toward the four corners of the frame frame 60. The four upper and lower braces 42, 42 are formed on the connecting plate 51, and one friction damper 49 is connected to the core plate 61 on the left upper and lower braces 42, 42. Since one friction damper 49 can be shared, the structure is simplified and it is advantageous in terms of cost, and the friction damper 49 can be stably operated.

Hereinafter, a modified example will be described.
In common with the first to fourth embodiments, the pin member is not limited to the stopper pin, and a protrusion protruding from the vibration control member, a bolt screwed to the vibration control member, or the like can be used. Further, a plurality of pairs of the pin member and the long hole may be provided in parallel. The same applies to the friction damper, and a plurality of sets of tightening bolts and long holes can be provided in parallel. Furthermore, it is also possible to restrict the pin member as a notch formed on the edge of the vibration control member instead of the long hole. On the other hand, the clamping means in the friction damper is not limited to the structure that penetrates the clamping bolt and presses it, but is sandwiched by a pair of arms from the outside of the sliding member, and the structure that presses one arm by screw feeding, etc. It can be changed as appropriate.

  In the first and second embodiments, the viscoelastic damper has a structure in which a pair of viscoelastic bodies are interposed between one fixed plate and two movable plates. It is also possible to adopt a structure in which one viscoelastic body is interposed between one damping member (such as a fixed plate) and the other one damping member (such as a movable plate). In this case, the sliding member of the friction damper may be connected to the end of the one damping member as in the third and fourth embodiments. On the contrary, in the third and fourth modes, as in the first mode, it is possible to adopt a structure in which a pair of viscoelastic bodies are interposed between one seismic control member and the other two seismic control members. is there. Of course, a plurality of vibration control members may be provided for each direction of operation, and not limited to the plate shape as in the above-described form, a plurality of large and small diameter cylinders that are loosely inserted coaxially are bonded between the cylinders. A structure in which an elastic body is bonded can also be adopted. In this structure, a stopper mechanism may be provided by providing a stopper in one cylinder on the operation side and providing a long hole in the cylinder on the other operation side.

On the other hand, in the friction damper, the friction plate may be fixed to the core plate side, the material of the friction plate is also another metal such as stainless steel, a composite material in which the fixing side and the friction side are separate metals, etc. As long as a predetermined sliding load can be obtained, it can be appropriately selected. Further, instead of the sliding member to which the friction plate is fixed as in the above embodiment, a sliding load may be obtained by directly processing a friction surface (knurling or the like) between the opposing surfaces of the plate to be the sliding member.
Furthermore, in forms 3 and 4, a single friction damper is shared by a plurality of viscoelastic dampers, but it is possible to provide individual friction dampers as in form 1 for each viscoelastic damper. Further, the structures of forms 2 and 4 can also be formed in a frame that is divided into two vertically as in form 3.

FIG. 6 is a front view of a shaft assembly frame of form 1. (A) is explanatory drawing of a brace, (B)-(E) is explanatory drawing which shows the operation | movement at the time of vibration. It is a front view of the shaft set frame of form 2. It is explanatory drawing of a viscoelastic damper and a friction damper. It is explanatory drawing which shows the operation | movement at the time of vibration. It is a front view of the shaft set frame of form 3. It is explanatory drawing of a friction damper part. It is a front view of the axial frame of form 4. It is explanatory drawing of a friction damper part.

Explanation of symbols

1, 20, 40, 60 ··· Frame frame, 2 · · · pillar, 3 · · horizontal member, 4, 42 · · brace, 6, 7, 22, 23, 44 · · fixed plate, 8, 24, 45 ·· movable plate, 9, 25 ·· viscoelastic damper, 10, 26, 49 ·· friction damper, 12, 28, 47 · · stopper pin, 13, 16, 29, 32, 48, 57 · · long hole 14, 30, 54 ... Friction plate 15, 31, 55 ... Tightening bolts.

Claims (4)

In the frame frame formed by columns and horizontal members,
A viscoelasticity comprising a plurality of opposing damping members and a viscoelastic body fixed between the damping members, and causing a damping action by shear deformation of the viscoelastic body accompanying the operation of the damping member in the opposite direction A damper, a plurality of sliding members facing each other, and clamping means for pressing the sliding members in the opposing direction to each other, and a friction damping action by the movement of the sliding members in the opposite direction against the clamping force of the clamping means. Construct a composite damper that connects the friction damper to be generated,
The vibration damper is operated by the viscoelastic damper at the time of vibration to the frame frame, while the friction damper is operated with a predetermined load within the design maximum proof stress of the frame frame. A damping structure,
A stopper mechanism is provided between the vibration control members of the viscoelastic damper to restrict shear deformation of the viscoelastic body with a predetermined displacement corresponding to a load smaller than a predetermined load on which the friction damper operates. Seismic control structure of the building.   A stopper mechanism is provided along the displacement direction of the viscoelastic body on the pin member provided on one of the operation-side vibration control members and the other operation-side vibration control member, and the pin member is loosely inserted. The building vibration control structure according to claim 1, comprising a hole.   A pair of viscoelastic dampers arranged so that the composite damper is diagonally symmetric in the frame plane obtained by dividing the inside of the frame frame into two halves vertically and symmetrical with respect to the vertical axis, and the intersection side of the two viscoelastic dampers 2. The upper and lower viscoelastic dampers are disposed at an intermediate portion of one of the pillars, and the upper and lower viscoelastic dampers are connected to one operating side sliding member, and one friction damper is connected to the other operating side sliding member. Or the vibration control structure of the building described in 2. Four viscoelastic dampers are arranged radially from the center of the shaft frame toward the four corners of the shaft frame, and the composite damper is disposed at the center of the shaft frame. 3. The upper and lower viscoelastic dampers on one of the left and right sides are formed from one friction damper in which the upper and lower viscoelastic dampers on the left and right other sides are respectively connected to the sliding member on the other operation side. Seismic control structure of building described in 2.

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