CN110397175A - A kind of SMA negative stiffness damping device - Google Patents

A kind of SMA negative stiffness damping device Download PDF

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Publication number
CN110397175A
CN110397175A CN201910596609.2A CN201910596609A CN110397175A CN 110397175 A CN110397175 A CN 110397175A CN 201910596609 A CN201910596609 A CN 201910596609A CN 110397175 A CN110397175 A CN 110397175A
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CN
China
Prior art keywords
sma
seat board
base plate
negative stiffness
rope
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Pending
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CN201910596609.2A
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Chinese (zh)
Inventor
曹飒飒
常化慧
纪泓言
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Guangzhou University
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Guangzhou University
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Priority to CN201910596609.2A priority Critical patent/CN110397175A/en
Publication of CN110397175A publication Critical patent/CN110397175A/en
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/98Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate
    • E04H9/02Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate withstanding earthquake or sinking of ground

Abstract

The present invention relates to a kind of SMA negative stiffness damping devices.The SMA negative stiffness damping device includes upper base plate, lower seat board and the sliding block between upper and lower seat board, the downside of the upper base plate has lower convex globoidal, the upper side of the lower seat board has upper convex globoidal, lower cancave cambered surface of the upper side of the sliding block with the lower convex globoidal male-female engagement with upper base plate, downside have the upper cancave cambered surface with the upper convex globoidal male-female engagement of lower seat board, and the damping device further includes the SMA rope being looped around between upper base plate and lower seat board, for being pressed on upper base plate and lower seat board on sliding block.SMA negative stiffness damping device of the invention has self-resetting capability, and SMA rigging has the ability for restoring self-deformation, this ability, which to subtract damping device, can restore self-deformation.SMA negative stiffness damping device forms negative stiffness effects using the lower convex globoidal of upper base plate, the convex cambered surface of lower seat board, reduces the internal stress of damping device substructure.

Description

A kind of SMA negative stiffness damping device
Technical field
The present invention relates to a kind of damping devices, more particularly to a kind of SMA negative stiffness damping device.
Background technique
Since the 1960s, shock insulation, energy-dissipating and shock-absorbing technology gradually cause attention and the extensive use of countries in the world In building structure and bridge structure.Shock insulation, cushion technique be by shock insulation, damping device by structure to greatest extent with earthquake when Ground motion or support movement separate, so that the geological process for being transmitted to superstructure be greatly decreased.A large amount of theoretical researches Experience have shown that, shock insulation is that performance is the most stable and most effective so far with energy-dissipating and shock-absorbing technology with part shock insulation engineering earthquake One of control technology, existing part uses shock insulation and the engineering structure of energy-dissipating and shock-absorbing technology has withstood examining for violent earthquake It tests, it was confirmed that the validity of this passive control technology subtracts seismic isolation technology also in the reinforcing and reconstruction of building and bridge structure It has obtained comparing and be widely applied, with the frequent generation of earthquake in recent years, antidetonation product relevant to bridge, building is obtained It is fast-developing.
Super-elastic shape memory alloy (Shape Memory Alloys, SMA) is applied to subtract Isolated Bridges, can effectively subtract Maximum relative displacement, reduction residual deformation, the additional energy dissipation capacity of increase between small pier beam.Domestic and foreign scholars propose large quantities of SMA limits Position device and the seismic isolation device based on SMA, greatly improve the automatic recovery ability of bridge.But since SMA member increases Coupling stiffness between pier beam causes interior force-responsive of the substructure under earthquake motion effect to significantly increase.How lower part is reduced The internal force of structure becomes the big problem that SMA vibration-isolating system bridge needs to solve.
Summary of the invention
To solve the above-mentioned problems, in the prior art to solve the present invention provides a kind of SMA negative stiffness damping device The SMA damping device technical problem big and easy to damage because of interior force-responsive.
A kind of technical solution of SMA negative stiffness damping device of the invention is:
A kind of SMA negative stiffness damping device includes upper base plate, lower seat board and the sliding block between upper and lower seat board, institute The downside for stating upper base plate has lower convex globoidal, and the upper side of the lower seat board has upper convex globoidal, the upper side of the sliding block The lower cancave cambered surface of arc top part male-female engagement with the lower convex globoidal with upper base plate, downside have the upper convex arc with lower seat board The upper cancave cambered surface of the arc top part male-female engagement in face, the damping device further include being looped around between upper base plate and lower seat board, using In upper base plate and lower seat board are pressed on the SMA rope on sliding block.
Limit SMA rope is additionally provided between the upper base plate and lower seat board, limit when opposite slide does not occur for upper and lower seat board SMA rope is in relaxed state, and the tensioning of limit SMA rope is for sliding upper and lower seat board when opposite sliding occurs for upper and lower seat board Position is limited.
The limit SMA rope is connect with upper and lower seat board by spherical hinge structure.
The spherical hinge structure includes the bulb that limit SMA rope both ends are arranged in, the bulb being fixedly connected on upper and lower seat board Seat.
The ball cup includes the monomer of two releasable connections.
The sliding block is cylindricality block, and the edge of the lower convex globoidal of the upper base plate is rounded, the upper convex arc of the lower seat board The edge in face is rounded.
The SMA rigging has a plurality of, lateral SMA rope of the part for parallel interval arrangement in a plurality of SMA rope, remainder For longitudinal SMA rope of parallel interval arrangement.
The lower convex globoidal of the upper base plate is equal with the radian of upper convex globoidal of lower seat board.
The beneficial effects of the present invention are:
Upper base plate connecting building structure in SMA negative stiffness damping device of the invention, lower seat board connect foundation structure, on The gravity of the structure of seat board carrying can act on convex globoidal, this gravitational load can be generated along upper convex globoidal and be cut along upper convex globoidal To component, this component provide sliding block glide active force, and between sliding block and upper convex globoidal frictional force prevention sliding block under It is sliding.When sliding force is greater than frictional force, the two difference helps sliding block to deviate from equilbrium position, is matched by upper cancave cambered surface and upper convex globoidal It closes, sliding block will slide on upper base plate, so that damping device be made to generate negative stiffness.
SMA negative stiffness shock isolating pedestal of the invention has self-resetting capability, and SMA rigging has the ability for restoring self-deformation, This ability, which to subtract damping device, can restore self-deformation.SMA negative stiffness damping device using upper base plate lower convex globoidal, under The convex cambered surface of seat board forms negative stiffness effects, reduces the internal stress of damping device substructure.
Further, limit SMA rope effectively limits the maximum displacement of damping device, reduces so that being displaced between pier beam, can have Imitate the generation of restrainer earthquake.
Further, SMA negative stiffness damping device of the invention is in parallel with damper, it can achieve while reducing structure The dual control target of internal force and displacement.
Further, limit SMA rope is connect by spherical hinge structure with upper base plate, lower seat board, is conveniently replaceable limit SMA rope.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of SMA negative stiffness damping device of the invention;
Fig. 2 is the explosive view of SMA negative stiffness damping device of the invention;
Fig. 3 is the state diagram that upper and lower seat board does not occur when sliding relatively in SMA negative stiffness damping device of the invention;
Fig. 4 is the state diagram that upper and lower seat board occurs when sliding relatively in SMA negative stiffness damping device of the invention;
Fig. 5 is the structural schematic diagram of the spherical hinge structure in SMA negative stiffness damping device of the invention;
Fig. 6 is the structural schematic diagram of the flexural pivot ball cup in SMA negative stiffness damping device of the invention;
Fig. 7 is the structural schematic diagram of limit the SMA rope and bulb in SMA negative stiffness damping device of the invention;
Fig. 8 be along Fig. 7 II-II to cross-sectional view;
Fig. 9 be along Fig. 7 I-I to cross-sectional view;
Figure 10 is the connection status figure of the sleeve and limit SMA in SMA negative stiffness damping device of the invention;
In figure: 1- upper base plate;Convex globoidal under 11-;Seat board under 2-;The upper convex globoidal of 21-;3-SMA rope;31- transverse direction SMA rope; The longitudinal direction 32- SMA rope;4- sliding block;Cancave cambered surface under 41-;5- limits SMA rope;51-SMA;6- bulb;61- perforation;7- ball cup; 71- ball cup monomer one;72- ball cup monomer two;8- rope inner sleeve;9- rope outer sleeve.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below Example is not intended to limit the scope of the invention for illustrating the present invention.
The specific embodiment one of SMA negative stiffness damping device of the invention, as shown in Figure 1 and Figure 2, including upper base plate 1, under Seat board 2 and the sliding block 4 between upper and lower seat board, upper base plate 1 and lower seat board 2 are rectangular slab, and sliding block 4 is column construction. The center of the downside of upper base plate 1 has lower convex globoidal 11, and the upper side of lower seat board 2 has upper convex globoidal 21, upper convex arc Face 21 and the edge of lower convex globoidal 11 are rounded, projection of the lower convex globoidal 11 of upper base plate 1 on lower seat board 2 and lower seat board 2 Upper convex globoidal 21 coincide.The upper side of sliding block 4 has the lower cancave cambered surface with the arc top part male-female engagement of lower convex globoidal 11 41, downside has the upper cancave cambered surface with the arc top part male-female engagement of upper convex globoidal 21, so that sliding block 4 can be along lower convex arc Face 11, upper convex globoidal 21 slide.
Referring to shown in Fig. 3, Fig. 4, the edge of upper base plate 1 has the flanging bent downward, and the edge of lower seat board 2 has upward The flanging of bending skids off the gap between upper base plate 1 and lower seat board 2 for limiting to sliding block 4 to prevent limited slip block 4.
In the present embodiment, SMA negative stiffness damping device further include be looped around between upper base plate 1 and lower seat board 2, for by Seat board 1, lower seat board 2 are pressed on the SMA rope 3 on sliding block 4.SMA rope 3 has more, and every SMA rope 3 is d's by seven diameters SMA are constituted, and the part in more SMA ropes 3 is the lateral SMA rope 31 of parallel interval arrangement, and remainder is parallel interval cloth The longitudinal SMA rope 32 set.Lateral SMA rope 31 and longitudinal direction SMA rope 32 can upper base plate to rectangle, lower seat board circumferential direction generation act on Power.
SMA negative stiffness damping device further includes more limit SMA ropes 5 being connected between upper base plate 1 and lower seat board 2, more It is circumferentially uniformly distributed by the center of circle of the point on the axis of sliding block 4 that root limits SMA rope 5.As shown in Figure 7, Figure 8, every limit SMA rope 5 by The SMA silk 51 that seven diameters are d is constituted, as shown in figure 9, bulb 6 has the perforation 61 passed through for SMA silk 51.Limit SMA rope 5 End be cased with rope inner sleeve 8, be connected with rope outer sleeve 9 between two rope inner sleeves 8, as shown in Figure 10 so that limit SMA rope It is end to end.Limit SMA rope 5 is connect with upper base plate 1, lower seat board 2 by spherical hinge structure.Specifically, as shown in Figure 5, Figure 6, ball Hinged structure includes the ball cup 7 for being connected to the bulb 6 at limit 5 both ends of SMA rope and being fixed on upper base plate 1 and lower seat board 2.On Ball cup 7 on seat board 1 is fixed on the outside of lower convex globoidal 11, and the ball cup 7 on lower seat board is fixed on the outer of convex globoidal 21 Side.
Ball cup 7 includes the ball cup monomer 1 and ball cup monomer 2 72 of releasable connection, one 71 He of ball cup monomer Ball cup monomer 2 72 is bolted on upper base plate 1 and lower seat board 2.Ball cup monomer 1 and ball cup monomer 2 72 Between there is the accommodating chamber for accommodating bulb 6, there is the hole of reeving be connected to accommodating chamber, for limiting on ball cup monomer 2 72 SMA rope 5 passes through.
In the present embodiment, limit SMA rope 5 is U-shaped, and in upper base plate 1 and lower seat board 2 phase does not occur for the limit SMA rope 5 of U-shaped Relaxed state is in when to sliding.When opposite slide occurs for upper base plate 1, lower seat board 2, the limit tensioning of SMA rope 5 is for upper base plate 1 and the sliding position of lower seat board 2 play restriction effect.
The principle of SMA negative stiffness damping device of the invention are as follows: under normal use, damping device carries structure upper Lotus is uniformly transmitted to structure, plays the role of common support.When small earthquakes occur, upper base plate 1 and sliding block 4, lower seat board 2 with Sliding block 4 occurs to slide relatively, friction energy-dissipating and extending structure period, plays good isolating affection.When earthquake occurrence, except upper It states outside Frictional Slipping, the SMA rope 3 being looped around between upper base plate 1, lower seat board 2 will participate in hysteretic energy, and special using its super-elasticity Property provide restoring force, achieve the purpose that reduce structural response, limitation support displacement;The tensioning of SMA rope 5 is limited simultaneously, limits the seat of honour The slide displacement of plate 1, lower seat board 2.
Upper base plate connecting building structure in SMA negative stiffness damping device of the invention, lower seat board connect foundation structure, on The gravity of the structure of seat board carrying can act on convex globoidal, this gravitational load can be generated along upper convex globoidal and be cut along upper convex globoidal To component, this component provide sliding block glide active force, and between sliding block and upper convex globoidal frictional force prevention sliding block under It is sliding.When sliding force is greater than frictional force, the two difference helps sliding block to deviate from equilbrium position, is matched by upper cancave cambered surface and upper convex globoidal It closes, sliding block will slide on upper base plate, so that damping device be made to generate negative stiffness.
In the present embodiment, the lower convex globoidal 11 of upper base plate 1, the radius of the upper convex globoidal 21 of lower seat board 2 depend on SMA and bear just The size of negative stiffness needed for spending damping device, negative stiffness needed for SMA negative stiffness damping device is bigger, the lower convex globoidal of upper base plate 1 11, the radius of the upper convex globoidal 21 of lower seat board 2 is bigger.The height of sliding block 4 and the self-resetting capability of SMA negative stiffness damping device have It closes, sliding block 4 is higher, and the self-resetting capability of SMA negative stiffness damping device is stronger.3 length of SMA rope is according to the arrangement form of SMA rope 3 It is determined with initial tensioning force.The sectional area of SMA rope 3 is determined according to the size of initial tensioning force, arrangement form and required restoring force.
SMA negative stiffness damping device of the invention has self-resetting capability, and SMA rope 3 has the ability for restoring self-deformation, This ability makes damping device that can restore self-deformation.SMA negative stiffness damping device using upper base plate 1 lower convex globoidal 11, The upper convex globoidal 21 of lower seat board 2 forms negative stiffness effects, reduces the internal stress of damping device substructure.It is effective to limit SMA rope 5 The maximum displacement of damping device is limited, reduces so that being displaced between pier beam, can effectively prevent falling the generation of beam earthquake.It will be of the invention SMA negative stiffness damping device is in parallel with damper, can achieve while reducing the dual control target of structural internal force and displacement.Limit SMA rope 5 is connect by spherical hinge structure with upper base plate 1, lower seat board 2, and limit SMA rope 5 is conveniently replaceable.
The specific embodiment two of SMA negative stiffness damping device of the invention, the specific implementation with SMA negative stiffness damping device It is in place of the difference of example one, it is the lower convex globoidal of ellipse, lower seat board that the upper base plate downside in the present embodiment, which has boundary, It is the upper convex globoidal of ellipse that upper side, which has boundary,.In other embodiments, the boundary of lower convex globoidal and upper convex globoidal can also be Other shapes only need to guarantee that sliding block can slide between upper convex globoidal, lower convex globoidal.Other are the same as example 1, no longer superfluous It states.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement Also it should be regarded as protection scope of the present invention.

Claims (8)

1. a kind of SMA negative stiffness damping device, it is characterised in that: including upper base plate, lower seat board and between upper and lower seat board Sliding block, the downside of the upper base plate has lower convex globoidal, and the upper side of the lower seat board has upper convex globoidal, the sliding block Lower cancave cambered surface of the upper side with the lower convex globoidal male-female engagement with upper base plate, downside there is the upper convex globoidal with lower seat board The upper cancave cambered surface of male-female engagement, the damping device further include be looped around between upper base plate and lower seat board, for by upper base plate and Lower seat board is pressed on the SMA rope on sliding block.
2. SMA negative stiffness damping device according to claim 1, it is characterised in that: between the upper base plate and lower seat board It is additionally provided with limit SMA rope, limit SMA rope is in relaxed state when opposite slide does not occur for upper and lower seat board, and upper and lower seat board occurs The tensioning of limit SMA rope is for limiting upper and lower seat board sliding position when opposite sliding.
3. SMA negative stiffness damping device according to claim 2, it is characterised in that: the limit SMA rope and upper and lower seat Plate is connected by spherical hinge structure.
4. SMA negative stiffness damping device according to claim 3, it is characterised in that: the spherical hinge structure includes that setting exists The bulb for limiting SMA rope both ends, the ball cup being fixedly connected on upper and lower seat board.
5. SMA negative stiffness damping device according to claim 4, it is characterised in that: the ball cup includes two removable The monomer of connection.
6. described in any item SMA negative stiffness damping devices according to claim 1~5, it is characterised in that: the sliding block is cylindricality The edge of block, the lower convex globoidal of the upper base plate is rounded, and the edge of the upper convex globoidal of the lower seat board is rounded.
7. described in any item SMA negative stiffness damping devices according to claim 1~5, it is characterised in that: the SMA rigging has A plurality of, the part in a plurality of SMA rope is the lateral SMA rope of parallel interval arrangement, and remainder is the longitudinal direction of parallel interval arrangement SMA rope.
8. described in any item SMA negative stiffness damping devices according to claim 1~5, it is characterised in that: under the upper base plate Convex globoidal is equal with the radian of upper convex globoidal of lower seat board.
CN201910596609.2A 2019-07-02 2019-07-02 A kind of SMA negative stiffness damping device Pending CN110397175A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203782881U (en) * 2014-04-18 2014-08-20 北京建筑大学 Shock insulation support
CN104652640A (en) * 2014-12-24 2015-05-27 北京工业大学 Anti-pulling, limiting and earthquake-insulating device integrated by guide rails and vertical ropes
CN104763057A (en) * 2015-03-26 2015-07-08 东南大学 Shape Memory Alloy (SMA)-friction pendulum clearance compound isolation bearing
CN106968499A (en) * 2017-03-09 2017-07-21 上海大学 A kind of level of subsidiary vertical shock-absorbing function is to negative stiffness device
CN107761556A (en) * 2017-11-16 2018-03-06 北京工业大学 Consume energy spacing variable curvature sliding friction shock isolating pedestal
CN208685843U (en) * 2018-01-04 2019-04-02 北京建筑大学 Multifunctional adaptive answers friction-pendulum shock-insulation support

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203782881U (en) * 2014-04-18 2014-08-20 北京建筑大学 Shock insulation support
CN104652640A (en) * 2014-12-24 2015-05-27 北京工业大学 Anti-pulling, limiting and earthquake-insulating device integrated by guide rails and vertical ropes
CN104763057A (en) * 2015-03-26 2015-07-08 东南大学 Shape Memory Alloy (SMA)-friction pendulum clearance compound isolation bearing
CN106968499A (en) * 2017-03-09 2017-07-21 上海大学 A kind of level of subsidiary vertical shock-absorbing function is to negative stiffness device
CN107761556A (en) * 2017-11-16 2018-03-06 北京工业大学 Consume energy spacing variable curvature sliding friction shock isolating pedestal
CN208685843U (en) * 2018-01-04 2019-04-02 北京建筑大学 Multifunctional adaptive answers friction-pendulum shock-insulation support

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