JP6696754B2 - Composite vibration damper for structures - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a composite vibration damper for structures used as a vibration control device for structures such as buildings and bridges.

  As a damping damper for structures such as buildings and bridges, a buckling-restraint type structural damper using low yield point steel with a large damping constant has been put into practical use. Such a structure vibration damper utilizes the fact that the hysteresis energy when the low yield point steel is elastically plastically deformed is large and the damping constant is large, and it is possible to reduce the shaking even in a large earthquake motion, It is possible to avoid damage such as structural damage.

Japanese Utility Model Publication No. 5-57110 JP, 2015-45366, A

  However, the buckling-restraint type vibration damper for structures using low yield point steel has a problem that it is not suitable for absorbing vibration due to strong wind and deformation ghee due to temperature change. Further, in the buckling restraint type vibration damper for structures using the low yield point steel, there is a problem in durability in the low cycle fatigue region where the low yield point steel acts during an earthquake. Further, the buckling restraint type structural damping damper using low yield point steel is arranged between two structural parts that are displaced relative to each other, but it is compatible with displacements of the structural damping damper other than the axial direction. In order to do so, there is a problem that it is necessary to connect the structural vibration damper with the expensive universal joint between the structural parts that are relatively displaced.

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

MEANS TO SOLVE THE PROBLEM In order to solve the above-mentioned subject, the compound damping damper for structures of the present invention buckles an axial force member which is connected to one structure part which carries out relative displacement, and which elastically and plastically absorbs energy at the time of an earthquake. A first damping damper that is stiffened by a cylindrical member connected to the other structural portion that is relatively displaced, a rod member that is relatively displaceably inserted into the cylindrical member, and an inner peripheral surface of the cylindrical member. An outer peripheral surface is fixed to an inner peripheral surface of a ring-shaped elastic rubber that is fixed and has a hole through which the rod member is inserted, and an outer peripheral surface of the ring-shaped elastic rubber that is fixed to the inner peripheral surface of the tubular member. A hollow pipe through which a rod member can be inserted and which transmits relative displacement at the time of an earthquake to elastic rubber; and a relative displacement between the tubular member and the rod member which is transmitted to the elastic rubber and which is absorbed by elastic deformation of the elastic rubber. A second damping damper, wherein the first damping damper and the second damping damper are connected in series.

  Further, the structure composite vibration damper of 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. ..

  Further, the structure composite vibration damper of the present invention is characterized in that the end portion of the axial force member of the first vibration damper and the end portion of the rod member of the second vibration damper are connected. ..

  In the structure composite vibration damper of the present invention, the tubular member is composed of a plurality of unit tubular bodies, and an outer peripheral surface of a ring-shaped elastic rubber is provided on an inner peripheral surface of each of the unit tubular bodies. Fixed, the rod member can be inserted into the inner peripheral surface of the ring-shaped elastic rubber, the outer peripheral surface of the hollow pipe that transmits the relative displacement at the time of an earthquake to the elastic rubber is fixed, and the plurality of unit tubular bodies are fixed. It is characterized in that it is integrally connected to form a tubular member.

  Further, the composite vibration damper for structures according to the present invention is characterized in that the axial force member is formed of an Fe-Mn-Si alloy.

  Further, the composite vibration damper for structures according to the present invention is such that the pin hole and the long hole are formed in the buckling restraint member of the first vibration damper at predetermined intervals in the axial direction, and the buckling restraint member is held in the axial force member. The pin hole formed in the member and the pin engaging with the long hole are fixed.

  Further, the structure composite vibration damper of the present invention has a stopper fixed to the end of the tubular member of the second vibration damper and locked to the stopper on the rod member to restrain the elastic deformation of the elastic rubber. It is characterized by fixing the stop ring.

  Further, the structure composite vibration damper of the present invention is a fall prevention member that allows displacement in the axial direction and a direction other than the axial direction between the first vibration damper and the second vibration damper. It is characterized by connecting.

The first damping damper, which is stiffened by a buckling restraint member for the axial force member that is connected to one of the structural parts that are relatively displaced and absorbs the energy during an earthquake by elastically deforming, and the other structural part that is relatively displaced. a ring-shaped elastic rubber which is fixed to the inner peripheral surface of the rod member and the tubular member to form a hole for inserting the rod member inserted displaceable relative to the tubular member and the tubular member connected, the Hollow pipe that has an outer peripheral surface fixed to the inner peripheral surface of a ring-shaped elastic rubber whose outer peripheral surface is fixed to the inner peripheral surface of the tubular member, allows the rod member to be inserted therethrough, and transmits relative displacement to the elastic rubber during an earthquake And a second vibration damper that transmits relative displacement between the tubular member and the rod member to the elastic rubber and absorbs it by elastic deformation of the elastic rubber, the first vibration damper and the first vibration damper. By connecting the two damping dampers in series, the vibration energy of the degree of deformation caused by strong wind and temperature change is absorbed by the elastic deformation of the elastic rubber of the second damping damper, which is repeated during an earthquake. becomes possible to structure composite vibration dampers which axial force member of the first vibration dampers durable to absorb by elastic-plastic deformation for large displacements, relative with respect to the cylindrical member of the rod member Movement is secured, and relative displacement during an earthquake can be reliably transmitted to the seismic energy absorber.
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 can be operated against displacements other than the axial direction. Since it can be elastically deformed and absorbed, it is possible to cope without using an expensive universal joint.
By connecting the end portion of the axial force member of the first vibration damper and the end portion of the rod member of the second vibration damper, the axial force member and the rod against the displacement of the tubular member of the second damper. The members can be linearly displaced relative to each other.
The tubular member is composed of a plurality of unit tubular bodies, the outer peripheral surface of the ring-shaped elastic rubber is fixed to the inner peripheral surface of each of the unit tubular bodies, and the inner peripheral surface of the ring-shaped elastic rubber is By fixing the outer peripheral surface of the hollow pipe that can insert the rod member and transmitting the relative displacement at the time of earthquake to the elastic rubber, and connecting the plurality of unit cylindrical bodies integrally to form a cylindrical member, It is possible to manufacture a unit tubular body having a short length by a dedicated mold, and it is possible to manufacture an inexpensive damper with little variation in quality.
Further, it becomes possible to arrange the elastic rubber in the short unit tubular body extremely easily as compared with the long tubular member. Since the unit tubular body in which the elastic rubber is arranged is unitized, it is possible to easily and inexpensively manufacture a damper having a variety of variations as needed.
By forming the axial force member from a Fe-Mn-Si alloy, a damper having excellent low-temperature characteristics, high seismic energy damping efficiency, and durability in the 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 restraint member of the first vibration damper at predetermined intervals in the axial direction, and a pin hole formed in the buckling restraint member and the long hole are engaged with the axial force member. By fixing the, the displacement within a predetermined range between the axial force member and the buckling restraint member is allowed, and after the axial force member is broken due to a large displacement, the displacement can be transmitted to the buckling restraint member via the pin. It is possible to prevent the damping damper from falling off.
By fixing a stopper to the end of the tubular member of the second vibration damper and fixing a locking ring that locks the stopper to the rod member and restrains elastic deformation of the elastic rubber, It becomes possible to prevent breakage.
By connecting the first damping damper and the second damping damper with a fall-prevention member that allows displacement in the axial direction and directions other than the axial direction, the axial force can be increased by the addition of extremely large stress during an earthquake. Even if the member or the elastic rubber is broken, it is possible to prevent the first vibration damper and the second vibration damper from falling off.

It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention. (A) (b) It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention.

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

  A composite vibration damper 1 for a structure of the present invention comprises a first vibration damper 2 connected to one structural portion that is relatively displaced and a second vibration damper 3 connected to the other structural portion in series. It is composed by connecting.

  In the first damping damper 2, the axial force member 4 is arranged inside the buckling restraint member 5, and when axial force acts during an earthquake, the axial force member 4 elastically-plastically deforms to absorb the seismic energy. It is a restraint type vibration damper for structures.

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

  Therefore, the axial force member 4 of the first damping damper 2 which is the buckling restrained type damping damper of the structure composite damping damper 1 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 damping efficiency, and has durability in a low cycle fatigue region that acts on the axial force member 4 at the time of a large earthquake. Therefore, a low yield point steel is used. It is superior to the buckling-restraint type damping damper.

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

  A first damping damper joint 6 is fixed to one end of the first damping damper 2 for connecting to one of the structural portions that are relatively displaced. As the first damping damper joint 6, an ordinary clevis joint is used. A connecting member 7 for connecting the second vibration damper 3 in series is fixed to the other end of the first vibration damper 2. A female screw hole is formed in the connecting member 7. The first damping damper 2 and the second damping damper 3 may be connected by any other connecting method.

  The second vibration damper 3 connected in series to the first vibration damper 2 has a second vibration damper joint 8 fixed to one end for connecting to the other structural portion that is relatively displaced. It has a tubular member 9. A hollow pipe 11 into which the rod member 12 can be inserted is arranged in the tubular member 9, and a ring-shaped elastic rubber 10 is vulcanized and formed between the inner wall of the tubular member 5 and the outer circumference of the hollow pipe 11. The inner wall of the cylindrical member 9 and the outer circumference of the hollow pipe 11 are integrally fixed. A fixed space is provided on the second vibration damper joint 8 side of the ring-shaped elastic rubber 10.

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

  The male screw portion 12b at the end of the rod member 12 is screwed into the female screw hole formed in the connecting member 7 fixed to the end of the first vibration damper 2. In this way, the first damping damper 2 and the second damping damper 3 are connected in series. Although the tubular member 9 has a circular cross section in the illustrated embodiment, the tubular member 9 may have a polygonal cross section.

  The first vibration damper joint 6 fixed to the end of the first vibration damper 2 is pin-connected to one of the structural parts that are relatively displaced, and the other structure is connected to the end of the second vibration damper 3. The fixed second damping damper joint 8 is pin-connected. The first damping damper joint 6 and the second damping damper joint 8 are ordinary clevis joints. The vibration dampers arranged between the structural parts that are displaced relative to each other are connected by a universal joint in order to cope with the stress other than the axial direction, but in the composite vibration damper for a structure of the present invention, the second vibration damper is used. Since the elastic rubber 10 of the damper 3 elastically deforms and absorbs stress other than the axial direction, an inexpensive clevis joint can be used without using an expensive universal joint.

  As shown in FIG. 1, the fall prevention member mounting members 16 and 16 are fixed to the outer circumference of the buckling restraint member 5 of the first vibration damper 2 and the outer circumference of the tubular member 9 of the second vibration damper 3, The fall prevention member attachment members 16, 16 are connected by a fall prevention member 17. The captive prevention member 17 is connected with a certain play that allows displacement in the axial direction. Further, the fall prevention member 17 is formed of a wire rope or the like having a certain flexibility to allow displacement in directions other than the axial direction. The fall-off prevention member 17 applies the extremely large stress to the structure composite vibration damper 1 at the time of an earthquake, and even if the axial force member 4 or the elastic rubber 10 is broken, the first vibration damper and the second vibration damper. To prevent the falling off.

  The operation of the composite vibration damping damper 1 for a structure thus configured will be described. The elastic rubber 10 of the second vibration damper 3 elastically deforms to respond to vibrations due to strong winds, deformation due to temperature changes, and the like. Repeated large displacements during an earthquake are damped by the elastic-plastic deformation of the axial force member 4 of the first vibration damper 2. The axial force member 4 is formed of an Fe-Mn-Si alloy, has excellent low temperature characteristics, high seismic energy damping efficiency, and has durability in a low cycle fatigue region that acts during a large earthquake. It becomes possible.

  FIG. 4A, FIG. 4B, and FIG. 5 are views showing another embodiment of the second vibration damper 3. In this embodiment, the tubular member 9 is divided into a plurality of unit tubular bodies 9a, and a ring-shaped elastic rubber 10 and a hollow pipe 12 through which a rod member 12 can be inserted are arranged for each unit tubular body 9a. Then, the elastic rubber, the unit tubular body 9a, the elastic rubber 10, and the hollow pipe 11 are integrated by vulcanization molding. Since the unit tubular body 9a having a short length can be manufactured by a dedicated mold, it is possible to manufacture an inexpensive damper having a small variation in quality. Further, it becomes possible to make the arrangement of the elastic rubber 10 on the short unit tubular body 9a extremely easy as compared with the long tubular member 9. Since the unit tubular body 9a in which the elastic rubber 10 is arranged is unitized, it is possible to easily and inexpensively manufacture a damper having a variation as necessary.

  A plurality of unit tubular bodies 9a are connected by a connecting ring 15, the rod member 12 is inserted into the hollow pipe 11, and the displacement transmitting rings 13 and 14 are attached to the male screw portions 12a and 12b at both ends of the rod member 12 on the end surface of the hollow pipe 12. Screw it so that it sticks closely to.

  FIG. 6, FIG. 7, FIG. 8 and FIG. 9 are diagrams showing other embodiments of the composite vibration damper for structures. FIG. 6 is a diagram showing a state at the time of setting.

  A pin hole 5a and an elongated hole 5b are formed in the buckling restraint member 5 of the first vibration damper 2 at a predetermined interval in the axial direction. The pin hole 5a formed in the buckling restraint member 5 and the pin 4a and the pin 4b engaging with the elongated hole 5b are fixed to the axial force member 4, and the axial displacement of the axial force member 4 and the buckling restraint member 5 within a certain range. Secure.

  A stopper 9a having a hole through which the rod member 12 is inserted is fixed to the end of the tubular member 9 of the second vibration damper 3. The locking ring 12c 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, and the elastic rubber 10 is prevented from breaking.

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

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

  FIG. 8 shows a state in which the axial force member 4 of the first vibration damper 2 is broken due to a large displacement during an earthquake. 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 engage with the pin holes 5a and the long holes 5b formed in the buckling restraint member 5 to cause an earthquake. The displacement at that time is transmitted to the buckling restraint member 5 via the pins 4a and 4b, and prevents the first vibration damper 2 from falling off.

  The locking ring 12c fixed to the rod member 12 of the second vibration damper 3 is locked to the stopper 9a fixed to the end of the tubular member 9 against the large displacement during an earthquake, and the elastic rubber 10 is Constrain the displacement that causes breakage.

  As described above, according to the composite vibration damper for a structure of the present invention, the vibration due to the strong wind, the deformation due to the temperature change, etc. are absorbed by the elastic deformation of the elastic rubber of the second vibration damper, and the earthquake is absorbed. It becomes possible to provide a durable composite vibration damper for structures in which the axial force member of the first vibration damper absorbs elastically-plastically deformed against repeated large displacements. Since elastic rubber absorbs elastically by deforming, it can be supported without using an expensive universal joint. By forming the axial force member with Fe-Mn-Si alloy, it has excellent low temperature characteristics and seismic energy. It is possible to obtain a damper having high damping efficiency and having durability in a low cycle fatigue region that acts on the axial force member during a large earthquake.

  1: Composite vibration damper for structures, 2: First vibration damper, 3: Second vibration damper, 4: Axial force member, 4a, 4b: Pin, 5: Buckling restraint member, 5a: Pin Holes, 5b: long holes, 6: first damping damper joint, 7: connecting member, 8: second damping damper joint, 9: tubular member, 9a: stopper, 10: elastic rubber, 11: hollow Pipe, 12: Rod member, 12a, 12b: Male screw part, 12c: Locking ring, 13: Displacement transmission ring, 14: Displacement transmission ring, 15: Connection ring, 16: Fall prevention member attachment member, 17: Fall prevention member

Claims (8)

A first damping damper, which is connected to one of the structural parts that are relatively displaced and which stiffens an axial force member that elastically deforms and absorbs energy during an earthquake by a buckling restraint member,
A tubular member connected to the other structural portion that is relatively displaced, a rod member that is relatively displaceably inserted into the tubular member, and a hole that is fixed to the inner peripheral surface of the tubular member and that inserts the rod member are formed. Ring-shaped elastic rubber,
A hollow member that has an outer peripheral surface fixed to the inner peripheral surface of a ring-shaped elastic rubber whose outer peripheral surface is fixed to the inner peripheral surface of the tubular member, allows the rod member to be inserted, and transmits relative displacement to the elastic rubber during an earthquake. A pipe,
A second vibration damper that transmits relative displacement between the tubular member and the rod member to the elastic rubber and absorbs it by elastic deformation of the elastic rubber,
Equipped 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 damper for structures according to claim 1, wherein the first vibration damper and the second vibration damper are connected to one structural portion and the other structural portion by a clevis joint.  The composite vibration damper for structures according to claim 1 or 2, wherein an end portion of the axial force member of the first vibration damper and an end portion of the rod member of the second vibration damper are connected to each other. Damper.   The tubular member is composed of a plurality of unit tubular bodies, the outer peripheral surface of a ring-shaped elastic rubber is fixed to the inner peripheral surface of each of the unit tubular bodies, and the inner peripheral surface of the ring-shaped elastic rubber is fixed. The rod member is insertable, 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 plurality of unit tubular bodies are integrally connected to form a tubular member. The composite vibration damper for structures according to any one of claims 1 to 3. The composite vibration damper for a structure according to any one of claims 1 to 4 , wherein the axial force member is formed of a Fe-Mn-Si alloy.
  A pin hole and a long hole are formed in the buckling restraint member of the first vibration damper at a predetermined interval in the axial direction, and a pin hole formed in the buckling restraint member and the long hole are engaged with the axial force member. The vibration damping damper for a structure according to claim 1, wherein the vibration damping damper is fixed.   A stopper is fixed to the end of the tubular member of the second vibration damper, and a locking ring that locks with the stopper and restrains elastic deformation of the elastic rubber is fixed to the rod member. The vibration damper for structures according to any one of 5 above. 8. The fall prevention member that allows displacement in the axial direction and in a direction other than the axial direction, connects the first vibration damper and the second vibration damper to each other. The vibration damper for structures according to item 1.

Images