JP2005240856A - Lead filled vibration control damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to install a lead filled vibration control damper even at a narrow part such as a beam joint part and a post leg part of a building. <P>SOLUTION: This lead filled vibration control damper is provided with a casing 1, a moving member 2 which penetrates the casing in a direction crossing a predetermined vibration control direction and of which middle part is stored in the casing movably in the vibration control direction, single or a plurality of projections 3a fixedly provided on one of the middle part of moving member and the casing and opposing another and extending in a direction crossing the vibration control direction with interval in the vibration control direction in case of a plurality of projections, and a plate shape lead 4 filled in a gap between the moving member and the casing and energized in the vibration control direction by relative movement of the moving member and the casing to generate plastic flow exceeding the projection. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is used as a vibration control device for newly built or existing building structures and civil engineering structures to increase the structural safety of those structures in the event of a large earthquake, and to plastically flow the lead enclosed inside The present invention relates to a lead-filled vibration damping damper that produces a damping force and produces a vibration damping function.

As a conventional lead-filled vibration damper, for example, a lead extrusion damper described in Non-Patent Document 1 is known. This lead-extrusion type damper comprises a cylinder filled with lead and a loading rod that penetrates the cylinder and has a lead extrusion protrusion only in the center, and fixes the cylinder to the structure. Thus, a damping force due to plastic flow of lead is obtained by pushing and pulling one end of the rod for applying force.
Oiles Industrial Co., Ltd. Homepage, Seismic Isolation Company, Vibration Control Device, LED (Lead Extrusion Damper) [Search February 12, 2004], Internet <URL: http://www.oiles.co.jp/2/ kenchiku / sei_ken / sei_ken.htm>

  However, the conventional lead extrusion type damper uses a long rod which is arranged in the longitudinal direction of the damper and has a lead extrusion protrusion only at the center, and a damper is filled with a large amount of lead. Compared with the vibration damping force (damping force), the total length is large and the damper weight is also large, so there is a limit to where the structure can be installed.

  An object of the present invention is to advantageously solve the above-described problems. A lead-filled vibration damper of the present invention penetrates a casing, the casing in a direction crossing a predetermined vibration damping direction, and an intermediate portion. Is fixed to one of the moving member accommodated in the casing so as to be movable in the vibration damping direction, the intermediate portion of the moving member, and the casing, and is opposed to the other. The moving member and the casing are loaded in a gap between the moving member and the casing, and one or a plurality of protruding ridges that are spaced apart from each other in the vibration direction and extend in a direction intersecting the vibration control direction. And plate-like lead that is urged in the vibration-suppressing direction by the relative movement to generate a plastic flow exceeding the ridge.

  In such a lead-filled vibration damper of the present invention, the casing is fixed to one of the two structural members coupled to each other of the structure, and both ends of the moving member are fixed to the other, and the structure is fixed. When the lead-encapsulated damping damper of the present invention is inserted between these structural materials with the direction of the tensile force or compressive force applied between these two structural materials when the vibration is applied by an earthquake as the predetermined vibration damping direction, When vibration is applied to the structure due to an earthquake and a tensile force or compressive force is applied between the two structural members, the casing and the moving member are relatively moved in the vibration suppression direction by the tensile force or compressive force, Due to the relative movement, the lead inserted in the gap between the moving member and the casing is urged in the vibration damping direction, and a plastic flow over the ridge is generated in the lead, thereby causing vibration between the two structural members. Is braked Attenuated Te. If the number of ridges is increased, the damping force of the damper is increased without increasing the rigidity of the individual ridges and their peripheral portions.

  Therefore, according to the lead-filled damping damper of the present invention, a high damping force (damping force) can be exhibited by the plastic flow of lead. In addition, since the moving member penetrates the casing in a direction intersecting the predetermined damping direction, the entire length in the damping direction is reduced with respect to the damping force of the damper, and lead is made into a plate shape and moves with the casing. Since it is loaded in the gap with the member, the weight of the damper does not increase, so it is possible to install a lead-filled vibration damper in a narrow part such as a beam joint or a column base of a building, which was difficult in the past. Thus, the earthquake resistance of the building can be further improved.

  In the lead-filled vibration damping damper of the present invention, it is fitted between the moving member and arranged between the casing and the moving member, and moves together with the moving member in the vibration damping direction. A lead sealing member for sealing the lead may be provided in the casing, and in this way, the structure of the casing for enclosing lead can be simplified.

  Further, in the lead-filled vibration damper of the present invention, it may include a friction reducing member interposed between the casing and at least the moving member at a position other than the position where the lead material is present, In this way, the casing and at least the moving member are not in direct sliding contact with each other during the vibration damping operation, and the friction reducing member is in sliding contact with each other. Therefore, the vibration damping operation is smoothed, and reproducible vibration damping performance is achieved. It can be maintenance-free and does not require replacement or repair after an earthquake.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1A is a horizontal sectional view showing an embodiment of the lead-filled vibration damper of the present invention, and FIG. 1B is a cross-sectional view showing the lead-filled vibration damper of the embodiment. FIG. 1 and FIG. 1C are longitudinal sectional views taken along the line BB of FIG. 1A, showing the lead-filled vibration damper of the embodiment.

  As shown in FIGS. 1A to 1C, the lead-filled vibration damping damper of this embodiment intersects with a steel casing 1 and a predetermined vibration damping direction indicated by an arrow A in FIG. The steel force slider as a moving member that penetrates in the direction of movement (left and right in FIGS. 1A and 1B) and is accommodated in the casing 1 so as to be movable in the vibration damping direction. 2 and a direction fixed to the inside of the casing 1 so as to face the intermediate portion 2a of the slider 2 for force application and in a direction intersecting the vibration control direction with a gap from each other in the vibration control direction (FIG. 1 (a), ( In b), the steel plate is loaded in the gap between the two plate-like dies 3 made of steel each having two ridges 3a extending in the left-right direction), the force slider 2 and the casing 1, respectively. For relative movement of the force slider 2 and the casing 1 in the above-mentioned vibration control direction Is urged Risono damping direction becomes comprises the two lead plates 4 causing plastic flow that exceed the ridges 3a and.

  FIGS. 2A, 2B, and 2C are a plan view, a front view, and a side view showing the force applying slider 2, and as shown in the drawing, the force applying slider 2 is used as an intermediate portion. The sliding portion 2a has a substantially square shape, and has two arms 2b as both ends protruding from both sides of the sliding portion 2a. Here, the sliding part 2a is formed with a concave part 2c for accommodating the lead plate 4 in the middle part in the longitudinal direction of the upper surface and the lower surface, respectively. The arm portion 2b has a tip portion 2d and a penetrating portion 2e having a rectangular cross section thicker than the tip portion 2d and a base portion 2f having an oval cross section so that the tip portion 2d has sufficient bending rigidity. And a male screw is formed at the tip 2d. A friction reducing member 5 made of, for example, an oil-impregnated alloy is fixed to both the longitudinal ends of the upper and lower surfaces of the sliding portion 2a and the upper and lower surfaces of the penetrating portion 2e of the arm portion 2b.

  3A, 3B, and 3C are a bottom view, a front view, and a cross-sectional view showing a steel upper block 1a constituting the casing 1, and the upper block 1a is substantially U-shaped. The fitting rib 1d protrudes from the lower surface of both ends in the longitudinal direction, and the fitting recess 1e for positioning the die 3 is formed at the center of the recess between the both ends in the longitudinal direction. ing. Further, friction reducing members 5 made of, for example, oil-impregnated alloy are fixed so as to extend in the longitudinal direction on both sides in the width direction of the recess between both longitudinal ends of the upper block 1a.

  4 (a), (b) and (c) are a plan view, a front view and a cross-sectional view showing a steel lower block 1b which also constitutes the casing 1, and the lower block 1b is an upper block. 1a is formed in a substantially U shape, and a fitting groove 1f is formed on the upper surface of both longitudinal ends of the upper block 1b to fit the fitting rib 1d, and a recess between the longitudinal ends. A fitting recess 1e for positioning the die 3 is formed in the central portion of the. Furthermore, the friction-reducing members 5 made of, for example, oil-impregnated alloy are fixedly provided on both side portions in the width direction of the concave portion between both end portions in the longitudinal direction of the lower block 1b.

  FIGS. 5A, 5B and 5C are a plan view, a front view and a cross-sectional view showing a steel side block 1c which also constitutes the casing 1, and the side block 1c is shown in FIG. Further, for example, a rectangular through hole 1g for insertion of the force applying slider 2 is formed at the center thereof, and an upper flange 1h and a lower flange 1i projecting in the same direction are provided at the upper and lower portions thereof.

  FIG. 6 shows a lead seal which is arranged between the sliding portion 2a of the pressing slider 2 and the side block 1c of the casing 1 and slides in the casing 1 together with the pressing slider 2. It is a front view which shows the attachment board 6 as a member, This attachment board 6 is formed with the through-hole 6a which fits closely with the base 2f of the oval cross section of the slider 2 for a force.

  FIG. 7 is a front view showing the die 3, which is made of, for example, die steel, and when the upper block 1a and the upper block 1a are fitted into the fitting recesses 1e of the upper block 1a and the lower block 1b. Here, there are two ridges 3a extending in a direction orthogonal to the longitudinal direction of the lower block 1b (in FIG. 6, a direction orthogonal to the paper surface).

  8 is a front view showing the lead plate 4. The lead plate 4 is made of a lead alloy containing a slight amount of lead or antimony having a purity of 99.99% or more and a groove 4a corresponding to the protrusion 3a of the die 3. In addition, it is desirable to use a shape shaped so as to have a shape corresponding to the recess 2 c of the slider 2 for applying force.

  In assembling the lead-filled vibration damper of this embodiment shown in FIG. 1 using such components, first, the die 3 is fitted into the fitting recesses 1e of the upper block 1a and the lower block 1b, and the force is applied. The lead plates 4 are fitted into the recesses 2c on the upper and lower surfaces of the slider 2, respectively. Next, the base plate 6 is fitted to both the base portions 2f of the force slider 2, and the sliding portion 2a of the force slider 2 is inserted between the upper block 1a and the lower block 1b so that the upper block 1a and the lower block 1 The block 1b is combined up and down.

  Further, the side blocks 1c are fitted on both sides of the upper block 1a and the lower block 1b while inserting both the arm portions 2b of the slider 2 for force application into the through holes 1g of the side block 1c. The upper block 1a and the lower block 1b are sandwiched between the upper flange 1h and the lower flange 1i of the block 1c, and the through portion 2e of the force slider 2 is slid into the through hole 1g of the side block 1c via the friction reducing member 5 The casing 1 is assembled by fitting the upper block 1a, the lower block 1b, and the side block 1c together with bolts or the like (not shown).

  When both arm portions 2b of the force applying slider 2 of the lead-filled vibration damper of this embodiment are pushed (or pulled) as shown by an arrow A in FIG. 1, the sliding portion 2a of the force applying slider 2 is moved. Both ends of the longitudinal direction are inserted between them and the lead plate 4 enclosed in the casing 1 is compressed. Eventually, the lead of the lead plate 4 is slid between the protrusion 3a of the die 3 and the slider 2 for applying force. It starts to move by plastic flow through the narrow part between the concave part 2c of 2a. In this embodiment, since the two protrusions 3a are arranged, the lead that has moved further passes through the next narrow portion, and a large resistance force (braking force) is generated even when the lead is passed.

  Therefore, according to the lead-filled vibration damper of this embodiment, the damping force can be improved as compared with the conventional lead-filled vibration damper. The fluidized lead is stored in the recess 2c and starts to flow backward when a reverse force is applied. The resistance force of the lead, that is, the damping force of the damper can be set to a desired size by appropriately changing the shape of the die 3 having the protrusion 3a and the size of the narrow portion.

  FIG. 9 shows an example of the result of the vibration experiment using the lead-filled vibration damper of this embodiment. The vertical axis represents the resistance force (damping force) of the damper, and the horizontal axis represents the force slider 2. This represents the amount of movement (relative displacement of the damper). The relative displacement of the damper was set to 6 mm, 4 mm and 2 mm, and loading was repeated 10 times. However, as shown in the figure, the relationship between the resistance force and relative displacement at each relative displacement amplitude is almost constant. It satisfies the requirements of reproducible damping performance as a vibration damper and maintenance-free that does not require replacement or repair after a major earthquake.

  In addition, the lead-filled vibration damper of this embodiment is compact and has a feature that it can obtain a predetermined resistance force (damping force) of the damper relatively easily. It can be installed in narrow joints between members to improve the structural performance of the building, and the relatively large installation space in the building required by conventional dampers can be omitted. The space inside can be used effectively.

  FIGS. 10 (a) and 10 (b) show an example in which the lead-encapsulated damping damper of the above embodiment is incorporated in a beam joint of a steel structure ramen frame, in which the symbol RF denotes a steel structure ramen frame, CM Is a column, BM is a beam, BC is a beam joint, D is a lead-filled vibration damper of the above embodiment, and FR is a force rod that connects the force slider 2 of the damper D and the beam BM. If the damper D is installed only on the lower flange side of the beam BM in this way, it becomes an effective means for preventing damage to the building during a large earthquake.

  FIGS. 11 (a) and 11 (b) show an example in which the lead-enclosed vibration damper of the above embodiment is incorporated in the column base of a steel structure ramen frame. In FIG. Is a column, P is a column base, PC is a connecting part, D is a lead-filled vibration damper of the above embodiment, FR is a force rod that connects the force slider 2 of the damper D and the upper column CM. Each is shown.

  12 (a) and 12 (b) show an example in which the lead-encapsulated vibration damper of the above embodiment is incorporated into the end joint portion of the wall brace of the steel structure brace framework, and the symbol BF in the drawing is steel. Structural brace framework, WB is a wall brace, LB is a rib, WBC is a joint, D is a lead-filled vibration damper of the above embodiment, FR is a slider 2 for applying force to the damper D and an upper wall brace WB Each of the connecting force rods is shown.

  In addition, the structural type of the building as a target in the application examples illustrated in FIGS. 10 to 12 is not limited to the steel structure, but can be applied to a building of another structural type such as a wooden structure or a reinforced concrete structure. .

  Although the present invention has been described based on the illustrated example, the present invention is not limited to the above-described example. For example, the sliding portion 2a and the arm portion 2b of the force applying slider 2 are formed separately and fitted to each other. You may combine them. Further, the ridge 3a may be provided on the force slider 2 side and the lead plate 4 may be fixed on the casing 1 side. Furthermore, you may increase / decrease the number of the ribs 3a suitably as needed.

  Thus, according to the lead-filled vibration damping damper of the present invention, a high vibration damping force (damping force) can be exhibited by the plastic flow of lead. In addition, since the moving member penetrates the casing in a direction intersecting the predetermined damping direction, the entire length in the damping direction is reduced with respect to the damping force of the damper, and lead is made into a plate shape and moves with the casing. Since it is loaded in the gap with the member, the weight of the damper does not increase, so it is possible to install a lead-filled vibration damper in a narrow part such as a beam joint or a column base of a building, which was difficult in the past. Thus, the earthquake resistance of the building can be further improved.

(A) is a horizontal sectional view showing an embodiment of the lead-filled vibration damper of the present invention, (b) is a cross-sectional view showing the lead-filled vibration damper of the embodiment, (c) It is a longitudinal cross-sectional view which follows the BB line of (a) which shows the lead enclosure type damping damper of the Example. (A), (b) and (c) are the top view, the front view, and the side view which show the slider for applying force of the lead enclosure type damping damper of the said Example. (A), (b) and (c) are the bottom view, front view, and cross-sectional view which show the upper block which comprises the casing of the lead enclosure type damping damper of the said Example. (A), (b) and (c) are the top view, front view, and cross-sectional view which show the lower block which comprises the casing of the lead enclosure type damping damper of the said Example. (A), (b) and (c) are the top view which shows the side block which comprises the casing of the lead enclosure type damping damper of the said Example, a front view, and a cross-sectional view. It is a front view which shows the attachment plate arrange | positioned between the sliding part of the slider for applying force of the lead enclosure type damping damper of the said Example, and the both-sides block of a casing. It is a front view which shows the dice | dies of the lead enclosure type damping damper of the said Example. It is a front view which shows the lead plate of the lead enclosure type damping damper of the said Example. It is a characteristic diagram which illustrates the result of the vibration experiment using the lead enclosure type damping damper of the said Example. (A) is explanatory drawing which shows generally the example which incorporated the lead enclosure type damping damper of the said Example in the beam joint, (b) is explanatory drawing which expands and shows the beam joint BC vicinity of (a). is there. (A) is explanatory drawing which shows generally the example which incorporated the lead enclosure type damping damper of the said Example in the column base, (b) is explanatory drawing which expands and shows the connection part PC vicinity of (a). is there. (A) is explanatory drawing which shows the example which integrated the lead enclosure type damping damper of the said Example in the edge part junction part of a wall surface brace, (b) expands the junction part WBC vicinity of (a). It is explanatory drawing shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 1a Upper block 1b Lower block 1c Side block 1d Fitting rib 1e Fitting recessed part 1f Fitting groove 1g Through hole 1h Upper flange 1i Lower flange 2 Force slider 2a Sliding part 2b Arm part 2c Recessed part 2d Tip part 2e Penetration part 2f Base part 3 Dies 3a Projection 4 Lead plate 4a Groove 5 Friction reducing member 6 Attached plate 6a Through hole

Claims (3)

A casing,
A moving member that penetrates the casing in a direction that intersects a predetermined vibration damping direction and that is accommodated in the casing so as to be movable in the vibration damping direction in an intermediate portion;
Fixed to one of the intermediate part of the moving member and the casing and opposed to the other, in the case of a plurality of strips, spaced apart from each other in the vibration damping direction, each in a direction intersecting the vibration damping direction One or more extending ridges,
Plate-shaped lead that is loaded in a gap between the moving member and the casing, and is urged in the vibration damping direction by relative movement between the moving member and the casing to generate a plastic flow that exceeds the ridge,
Lead-filled vibration damper with   A lead sealing member that is fitted to the moving member and disposed between the casing and the moving member, moves in the vibration damping direction together with the moving member, and seals the lead in the casing. The lead-filled vibration damping damper according to claim 1, comprising:   The lead-enclosed vibration damping device according to claim 1, further comprising a friction reducing member interposed between the casing and at least the moving member at a position other than the position where the lead material is located. Damper.

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