JP2017089146A - Composite vibration control damper for structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite vibration control damper for a structure, capable of coping even with displacement by vibration and a temperature change by a strong wind with a simple structure, having durability even in a low cycle fatigue area in earthquake time, and capable of coping with displacement except for the axial direction of a vibration control damper for the structure without using a universal joint.SOLUTION: A composite vibration control damper comprises a first vibration control damper connected to a relatively displacing one structure part and stiffening an axial force member for absorbing energy in earthquake time by elastically-plastically deforming by a buckling restraining member and a second vibration control damper having a cylindrical member connected to the relatively displacing other structure part, a rod member relatively displaceably inserted into the cylindrical member and ring-shaped elastic rubber fixed to an inner peripheral surface of the cylindrical member and forming a hole for inserting the rod member and absorbing relative displacement of the cylindrical member and the rod member by elastic deformation of the elastic rubber by transmitting to the elastic rubber, and the first vibration control damper and the second vibration control damper are connected in series.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a composite vibration damper for a structure used as a vibration damping device for a structure such as a building or a bridge.

  As a damping damper for structures such as buildings and bridges, a buckling-restrained structure damper using a low yield point steel having a large damping constant has been put into practical use. Such a structure damping damper utilizes the fact that the low-yield point steel undergoes elasto-plastic deformation with a large hysteresis energy and a large damping constant, and can reduce shaking even in large earthquake motions. Damages such as structural damage can be avoided.

Japanese Utility Model Publication No. 5-57110 Japanese Patent Laid-Open No. 2015-45366

  However, a buckling-restrained structural vibration damper using a low yield point steel has a problem that it is not suitable for absorbing vibration due to strong winds or deformation ghee due to temperature changes. In addition, a buckling-restrained structural vibration damper using low yield point steel has a problem in durability in a low cycle fatigue region where the low yield point steel acts during an earthquake. In addition, buckling-restrained structural vibration dampers using low-yield-point steel are placed between two relatively displaced structural parts, but they can accommodate displacements other than the axial direction of structural vibration dampers. Therefore, there is a problem that it is necessary to connect the structural damping damper for the structure with an expensive universal joint between the structural parts that are relatively displaced.

  The present invention has a simple structure that solves the problems of the prior art, can cope with vibrations caused by strong winds and displacement due to temperature changes, has durability even in the low cycle fatigue region during earthquakes, An object of the present invention is to provide a composite vibration damper for a structure that can cope with a displacement other than the axial direction of the vibration damper without using a universal joint.

  In order to solve the above-mentioned problem, the composite vibration damper for a structure of the present invention is a buckling restraining member including an axial force member that is coupled to one of the structural parts that are relatively displaced and absorbs the energy at the time of earthquake by elastic-plastic deformation. A first damping damper stiffened by the rod, a cylindrical member connected to the other structural part that is relatively displaced, a rod member that is inserted into the cylindrical member so as to be relatively displaceable, and an inner peripheral surface of the cylindrical member A ring-shaped elastic rubber that is fixed and formed with a hole through which the rod member is inserted, and transmits a relative displacement between the cylindrical member and the rod member to the elastic rubber and absorbs it by elastic deformation of the elastic rubber; A damping damper, and the first damping damper and the second damping damper are connected in series.

  Further, the composite vibration damper for a structure according to the present invention is characterized in that the first vibration damper and the second vibration damper are connected to one structure portion and the other structure portion by a clevis joint. .

  In the composite vibration damper for a structure according to the present invention, the end of the axial force member of the first vibration damper and the end of the rod member of the second vibration damper are connected. .

  In the composite vibration damper for a structure of the present invention, the rod member can be inserted into the inner peripheral surface of a ring-shaped elastic rubber that is fixed to the inner surface of the cylindrical member. It is characterized by fixing the outer peripheral surface of the hollow pipe which transmits the elastic rubber to the elastic rubber.

  Further, in the composite vibration damper for a structure of the present invention, the cylindrical member is composed of a plurality of unit cylindrical bodies, and an outer peripheral surface of a ring-shaped elastic rubber is provided on the inner peripheral surface of each unit cylindrical body. The rod member can be inserted into the inner peripheral surface of the ring-shaped elastic rubber, and the outer peripheral surface of the hollow pipe that transmits the relative displacement during the earthquake to the elastic rubber is fixed, and the plurality of unit cylindrical bodies are It is characterized by being integrally connected to form a cylindrical member.

  In the composite vibration damper for a structure of the present invention, the axial force member is formed of an Fe—Mn—Si alloy.

  In the composite vibration damper for a structure of the present invention, a pin hole and a long hole are formed in the buckling restraining member of the first damping damper at predetermined intervals in the axial direction, and the buckling restraining member is restrained by the axial force member. The pin hole formed in the member and the pin engaged with the long hole are fixed.

  In the composite vibration damper for a structure of the present invention, a stopper is fixed to the end of the cylindrical member of the second vibration damper, and the rod member is locked with the stopper to restrain the elastic deformation of the elastic rubber. A stop ring is fixed.

  Further, the composite vibration damper for a structure of the present invention is a drop-off preventing member that allows displacement in the axial direction and directions other than the axial direction between the first vibration damper and the second vibration damper. It is characterized by connecting.

Connected to one structural part that is relatively displaced and connected to the first damping damper that stiffens the axial force member that plastically deforms and absorbs the energy at the time of earthquake with a buckling restraining member, and the other structural part that is relatively displaced A cylindrical member that is inserted into the cylindrical member so as to be relatively displaceable to the cylindrical member, and a ring-shaped elastic rubber that is fixed to the inner peripheral surface of the cylindrical member and has a hole through which the rod member is inserted, A second damping damper that transmits relative displacement between the cylindrical member and the rod member to the elastic rubber and absorbs the elastic member by elastic deformation of the elastic rubber, and includes the first damping damper and the second damping damper. By connecting vibration dampers in series, vibration energy of the degree of vibration due to strong winds or deformation due to temperature changes is absorbed by the elastic deformation of the elastic rubber of the second damping damper, resulting in a large displacement that is repeated during an earthquake. Against It becomes possible to construct composite vibration dampers which axial force member of the first vibration dampers durable to absorb by elastic-plastic deformation.
By connecting the first damping damper and the second damping damper to one structural part and the other structural part with a clevis joint, the elastic rubber of the second damping damper against the displacement other than the axial direction Since it can be elastically deformed and absorbed, it can be handled without using an expensive universal joint.
By connecting the end of the axial force member of the first damping damper and the end of the rod member of the second damping damper, the axial force member and the rod against the displacement of the cylindrical member of the second damper The member can be relatively displaced linearly.
The rod member can be inserted into the inner peripheral surface of the ring-shaped elastic rubber whose outer peripheral surface is fixed to the inner surface of the cylindrical member, and by fixing the outer peripheral surface of the hollow pipe that transmits the relative displacement during the earthquake to the elastic rubber The relative movement of the rod member with respect to the cylindrical member is ensured, and the relative displacement during the earthquake can be reliably transmitted to the seismic energy absorber.
The cylindrical member is composed of a plurality of unit cylindrical bodies, the outer peripheral surface of the ring-shaped elastic rubber is fixed to the inner peripheral surface of each unit cylindrical body, and the inner peripheral surface of the ring-shaped elastic rubber is The rod member can be inserted, the outer peripheral surface of the hollow pipe that transmits the relative displacement during the earthquake to the elastic rubber is fixed, and the plurality of unit cylindrical bodies are integrally connected to form a cylindrical member. It is possible to manufacture a short unit cylindrical body with a dedicated mold, and to manufacture a damper that is inexpensive and has little variation in quality. Further, the arrangement of the elastic rubber on the short unit cylindrical body can be extremely facilitated as compared with the long cylindrical member. Since the unit cylindrical body in which the elastic rubber is disposed is unitized, it is possible to easily manufacture a damper of a variation as necessary at low cost.
By forming the axial force member with an Fe-Mn-Si alloy, a damper having excellent low temperature characteristics, high seismic energy attenuation efficiency, and durability in a low cycle fatigue region that acts on the axial force member during a large earthquake, It becomes possible to do.
A pin hole and a long hole are formed in the buckling constraining member of the first damping damper at predetermined intervals in the axial direction, and a pin that is engaged with the pin hole and the long hole formed in the buckling constraining member on the axial force member Is fixed to allow a predetermined range of displacement between the axial force member and the buckling restraint member, and after the axial force member breaks due to a large displacement, the displacement can be transmitted to the buckling restraint member via the pin. It is possible to prevent the vibration damper from falling off.
A stopper is fixed to the end of the cylindrical member of the second damping damper, and a locking ring that locks with the stopper and restrains the elastic deformation of the elastic rubber is fixed to the rod member. Breaking can be prevented.
By connecting the first damping damper and the second damping damper with a drop-off prevention member that allows displacement in the axial direction and directions other than the axial direction, an axial force is applied by applying an extremely large stress during an earthquake. Even when the member or the elastic rubber is broken, the first damping damper and the second damping damper can be prevented from falling off.

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  An embodiment of a composite vibration damper for a structure according to the present invention will be described with reference to the drawings. 1 is a schematic view of a composite vibration damper for a structure according to the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. .

  The composite vibration damper 1 for a structure according to the present invention includes a first vibration damper 2 connected to one structure part that is relatively displaced and a second vibration damper 3 connected to the other structure part in series. Concatenated.

  In the first damping damper 2, the axial force member 4 is disposed in the buckling restraining member 5, and when an axial force is applied during an earthquake, the axial force member 4 is elastically plastically deformed to absorb the earthquake energy. This is a restraint type damping damper for structures.

  Usually, in the type of damper that absorbs seismic energy by elastic-plastic deformation of the axial force member 4, the axial force member 4 is made of low yield point steel. However, low yield point steel has a problem in durability in a low cycle fatigue region that acts during an earthquake.

  Therefore, the axial force member 4 of the first vibration damper 2 which is a buckling-restrained vibration damper of the composite vibration damper 1 for a structure of the present invention is formed of an Fe—Mn—Si alloy. The Fe-Mn-Si alloy is a shape memory alloy, has high seismic energy attenuation efficiency, and has durability in a low cycle fatigue region that acts on the axial force member 4 during a large earthquake. Therefore, a low yield point steel is used. It is superior to the buckling-restrained damping damper.

  In the embodiment shown in FIG. 2, the axial force member 4 is shown in a cross shape in cross section, and the buckling restraining member 5 is shown in a hollow shape in cross section, but the axial force member 4 may have any shape in cross section. good. Further, the cross-sectional shape of the buckling restraining member 5 may be any shape.

  A first damping damper joint 6 is fixed to one end of the first damping damper 2 so as to be connected to one structure part that is relatively displaced. The first damping damper joint 6 uses a normal clevis joint. A connecting member 7 for connecting the second damping damper 3 in series is fixed to the other end of the first damping damper 2. The connecting member 7 is formed with a female screw hole. As the connection method of the first vibration damping damper 2 and the second vibration damping damper 3, another connection method may be used.

  The second damping damper 3 connected in series to the first damping damper 2 has a second damping damper joint 8 for coupling to the other structural part that is relatively displaced fixed to one end. A cylindrical member 9 is provided. A hollow pipe 11 through which the rod member 12 can be inserted is disposed in the cylindrical member 9, and a ring-shaped elastic rubber 10 is formed between the inner wall of the cylindrical member 5 and the outer periphery of the hollow pipe 11 by vulcanization. The inner wall of the member 9 and the outer periphery of the hollow pipe 11 are fixed integrally. A certain space is provided on the ring-like elastic rubber 10 on the side of the second damping damper joint 8.

  A rod member 12 having male screw portions 12 a and 12 b formed at both ends is inserted into the hollow pipe 11 so that the male screw portions 12 a and 12 b at both ends protrude outside the hollow pipe 11. Displacement transmission rings 13 and 14 having female screw holes 13a and 14a are screwed into male screw portions 12a and 12b protruding from the hollow pipe 11 of the rod member 12, respectively. The displacement transmission rings 13 and 14 are screwed so as to be in close contact with both end faces of the hollow pipe 11.

  The male screw portion 12b at the end of the rod member 12 is screwed into a female screw hole formed in the connecting member 7 fixed to the end of the first damping damper 2. In this way, the first damping damper 2 and the second damping damper 3 are connected in series. In the embodiment shown in the figure, the cylindrical member 9 has a circular cross section, but the cross sectional shape of the cylindrical member 9 may be a polygon.

  The first damping damper joint 6 fixed to the end of the first damping damper 2 is pin-connected to one structural part that is relatively displaced, and the second damping damper 3 is joined to the other structural part. The fixed second damping damper joint 8 is pin-connected. The first damping damper joint 6 and the second damping damper joint 8 are normal clevis joints. The vibration dampers arranged between the structural parts that are relatively displaced are connected by a universal joint to cope with stresses other than the axial direction. However, in the composite vibration damper for a structure of the present invention, the second vibration dampers are connected. Since the elastic rubber 10 of the damper 3 elastically deforms and absorbs stresses other than in the axial direction, it is possible to cope with an inexpensive clevis joint without using an expensive universal joint.

  As shown in FIG. 1, dropout prevention member mounting members 16, 16 are fixed to the outer periphery of the buckling restraining member 5 of the first damping damper 2 and the outer periphery of the cylindrical member 9 of the second damping damper 3, The drop-off prevention member mounting members 16 and 16 are connected by a drop-off prevention member 17. The drop-off prevention member 17 is connected with a certain play that allows axial displacement. Further, by forming the drop-off prevention member 17 with a wire rope having a certain flexibility, displacement in directions other than the axial direction is allowed. The drop-off prevention member 17 is provided with the first damping damper and the second damping damper even when an extremely large stress is applied to the composite damping damper 1 for a structure and the axial force member 4 or the elastic rubber 10 is broken. Prevents falling off.

  The operation of the composite vibration damper 1 for a structure thus configured will be described. Vibrations due to strong winds, deformation due to temperature changes, and the like are dealt with by elastic deformation of the elastic rubber 10 of the second vibration damper 3. When a large displacement is repeated during an earthquake, the displacement is attenuated by elastic-plastic deformation of the axial force member 4 of the first vibration damper 2. A composite damping damper in which the axial force member 4 is formed of an Fe-Mn-Si alloy, has excellent low-temperature characteristics, has high earthquake energy attenuation efficiency, and has durability in a low cycle fatigue region that acts during a large earthquake. It becomes possible.

  FIGS. 4A and 4B and FIG. 5 are diagrams showing another embodiment of the second vibration damper 3. In this embodiment, the cylindrical member 9 is divided into a plurality of unit cylindrical bodies 9a, and a hollow pipe 12 into which the ring-shaped elastic rubber 10 and the rod member 12 can be inserted is arranged for each unit cylindrical body 9a. Then, the elastic rubber, the unit cylindrical body 9a, the elastic rubber 10, and the hollow pipe 11 are integrated by vulcanization molding. The short unit cylindrical body 9a can be manufactured with a dedicated mold, and it is possible to manufacture a damper that is inexpensive and has little variation in quality. Further, the arrangement of the elastic rubber 10 on the short unit cylindrical body 9a can be made extremely easy as compared with the long cylindrical member 9. Since the unit cylindrical body 9a in which the elastic rubber 10 is arranged is unitized, it is possible to manufacture a damper of a variation as needed at low cost and easily.

  A plurality of unit cylindrical bodies 9 a are connected by a connection ring 15, a rod member 12 is inserted into the hollow pipe 11, and displacement transmission rings 13 and 14 are connected to the male screw portions 12 a and 12 b at both ends of the rod member 12. Screw it so that it is in close contact.

  FIGS. 6, 7, 8, and 9 are views showing another embodiment of the composite vibration damper for a structure. FIG. 6 is a diagram showing a state at the time of setting.

  A pin hole 5a and a long hole 5b are formed in the buckling restraining member 5 of the first damping damper 2 at predetermined intervals in the axial direction. The pin 4a and the pin 4b engaged with the pin hole 5a and the long hole 5b formed in the buckling restraining member 5 are fixed to the axial force member 4, and the relative displacement within a certain range of the axial force member 4 and the buckling restraining member 5 is fixed. Secure.

  A stopper 9a having a hole through which the rod member 12 is inserted is fixed to the end of the cylindrical member 9 of the second damping damper 3. The locking ring 12 c is fixed to the rod member 12. By locking the locking ring 12c and the stopper 9a, the elastic rubber 10 is restrained from being deformed more than a predetermined amount to prevent the elastic rubber 10 from being broken.

  FIG. 6 is a diagram showing a state at the time of setting, and the pin 4 b fixed to the axial force member 4 is located at an intermediate position of the long hole 5 b formed in the buckling restraining member 5. As shown in FIG. 7, the displacement due to the constant temperature change, creep or the like is absorbed by the elastic deformation of the elastic rubber 10, and the axial force member 4 is not deformed.

  FIG. 8 is a diagram illustrating a state during an earthquake. During an earthquake, the seismic energy is absorbed by the elastic deformation of the elastic rubber 10 of the second damping damper 3. Further, the axial force member 4 of the first damping damper 2 is plastically deformed to absorb the seismic energy.

  FIG. 8 shows a state in which the axial force member 4 of the first damping damper 2 is broken due to a large displacement during an earthquake. The pins 4a and 4b fixed at intervals in the axial direction of the axial force member 4 in a state where the axial force member 4 is broken are engaged with the pin hole 5a and the long hole 5b formed in the buckling restraining member 5, and the earthquake The displacement at the time is transmitted to the buckling restraining member 5 through the pins 4a and 4b, and the first damping damper 2 is prevented from falling off.

  The locking ring 12c fixed to the rod member 12 of the second damping damper 3 is locked to the stopper 9a fixed to the end portion of the cylindrical member 9, and the elastic rubber 10 Restrain the displacement to break.

  As described above, according to the composite vibration damper for a structure of the present invention, vibrations caused by strong winds and deformation due to temperature change are absorbed by the elastic deformation of the elastic rubber of the second vibration damper, and the earthquake For large displacements that are sometimes repeated, the axial force member of the first damping damper can be made into a durable composite damping damper for structures that absorbs by elastic-plastic deformation. The elastic rubber is elastically deformed and absorbed, so it can be handled without using an expensive universal joint. By forming the axial force member with an Fe-Mn-Si alloy, it has excellent low-temperature characteristics and seismic energy. It is possible to provide a damper having high damping efficiency and durability in a low cycle fatigue region that acts on the axial force member during a large earthquake.

  1: composite vibration damper for structure, 2: first vibration damper, 3: second vibration damper, 4: axial force member, 4a, 4b: pin, 5: buckling restraining member, 5a: pin Hole: 5b: Long hole, 6: Fitting for first damping damper, 7: Connecting member, 8: Fitting for second damping damper, 9: Tubular member, 9a: Stopper, 10: Elastic rubber, 11: Hollow Pipe, 12: Rod member, 12a, 12b: Male thread portion, 12c: Locking ring, 13: Displacement transmission ring, 14: Displacement transmission ring, 15: Connection ring, 16: Falling prevention member mounting member, 17: Falling prevention member

Claims (9)

A first damping damper that is connected to one structural part that is relatively displaced and stiffens an axial force member that absorbs and absorbs the energy at the time of an earthquake by means of a buckling restraint member;
A tubular member connected to the other structural portion that is relatively displaced, a rod member that is inserted into the tubular member so as to be relatively displaceable, and a hole that is fixed to the inner peripheral surface of the tubular member and that passes through the rod member is formed. A second damping damper comprising a ring-shaped elastic rubber, transmitting a relative displacement between the tubular member and the rod member to the elastic rubber and absorbing the elastic rubber by elastic deformation;
With
A composite vibration damper for a structure, wherein the first vibration damper and the second vibration damper are connected in series.   The composite vibration damping damper for a structure according to claim 1, wherein the first damping damper and the second damping damper are connected to one structure portion and the other structure portion by a clevis joint.   The composite vibration damping for a structure according to claim 1 or 2, wherein an end of the axial force member of the first damping damper and an end of the rod member of the second damping damper are connected. Damper.   The rod member can be inserted into the inner peripheral surface of a ring-shaped elastic rubber whose outer peripheral surface is fixed to the inner peripheral surface of the cylindrical member, and the outer peripheral surface of a hollow pipe that transmits relative displacement during an earthquake to the elastic rubber is fixed. The composite vibration damper for a structure according to any one of claims 1 to 3, characterized in that:   The cylindrical member is composed of a plurality of unit cylindrical bodies, an outer peripheral surface of a ring-shaped elastic rubber is fixed to an inner peripheral surface of each unit cylindrical body, and an inner peripheral surface of the ring-shaped elastic rubber is fixed The rod member can be inserted, the outer peripheral surface of a hollow pipe that transmits relative displacement at the time of an earthquake to elastic rubber is fixed, and the unit cylindrical bodies are integrally connected to form a cylindrical member. The composite vibration damper for a structure according to claim 4.   The composite vibration damper for a structure according to any one of claims 1 to 5, wherein the axial force member is formed of an Fe-Mn-Si alloy.   A pin hole and a long hole are formed in the buckling constraining member of the first damping damper at predetermined intervals in the axial direction, and a pin that is engaged with the pin hole and the long hole formed in the buckling constraining member on the axial force member The structure damper according to any one of claims 1 to 6, wherein the damper is fixed.   A stopper is fixed to the end of the cylindrical member of the second damping damper, and a locking ring that locks the stopper with the stopper and restrains elastic deformation of the elastic rubber is fixed to the rod member. 6. A vibration damper for a structure according to any one of 6 above.   9. The drop-off preventing member that allows displacement in a direction other than the axial direction and the axial direction is connected between the first damping damper and the second damping damper part. The vibration damper for a structure according to item 1.

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