CN106013922B - A kind of second order frcition damper and shock-dampening method - Google Patents
A kind of second order frcition damper and shock-dampening method Download PDFInfo
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- CN106013922B CN106013922B CN201610572825.XA CN201610572825A CN106013922B CN 106013922 B CN106013922 B CN 106013922B CN 201610572825 A CN201610572825 A CN 201610572825A CN 106013922 B CN106013922 B CN 106013922B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
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- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The present invention relates to a kind of second order frcition damper, a kind of second order frcition damper includes single order friction element and second order friction element, and single order friction element and second order friction element are connected by welding；Single order friction element includes lower connecting plate, lower friction plate, single order mainboard, upper friction plate, upper junction plate, is connected upper junction plate, single order mainboard, lower connecting plate by high-strength bolt；Second level friction unit includes angle steel A, angle steel B, friction plate, backing plate, two level mainboard, is connected angle steel A, angle steel B, two level mainboard by high-strength bolt.A kind of second order frcition damper energy adjust automatically power consumption unit of the present invention, has good energy dissipation capacity, substantially increases damper utilization rate.
Description
Art
The present invention relates to a kind of building structure damping energy-dissipating device, more particularly to one kind is by adjusting high-strength bolt normal pressure
The second order frcition damper of friction is provided.
Background technology
The destruction of building is the main reason for causing earthquake disaster with collapsing in earthquake.Traditional structure antidetonation is to pass through increasing
Intensity, rigidity and the ductility of strong structure in itself resist earthquake damage.This method is both uneconomical or is unfavorable for reaching expected
Effect, and energy-dissipating and shock-absorbing technology be with structure damper in parallel in itself, by damper dissipation seismic energy, economical and effective,
It is active and effective antidetonation strategy.
Passive energy-consumption shock-absorption device existing at present has：Viscosity, friction-type, metal song take several classes such as type, viscoelastic type.
Viscoelastic damper is easy to aging, anti-fatigue performance is poor；Damper with viscosity easy to leak；Need to change after metal yield type macroseism.
Chinese patent notification number is that the U of CN 204401817 disclose the passive variable friction dampers with two-stage friction power, but the resistance
Buddhist nun's device construction is complicated.Conventional friction damper plays the single generation sliding i.e. under macroseism of sliding power and consumed energy, under middle shake, small shake
Do not play a role, service efficiency is low.
The content of the invention
In view of the shortcomings of the prior art, the present invention proposes a kind of second order frcition damper, a kind of second order frcition damper bag
Single order friction element and second order friction element are included, single order friction element and second order friction element are connected by welding.Single order friction
Erection sequence is lower connecting plate, lower friction plate, single order mainboard, upper friction plate, upper junction plate to unit from top to bottom, passes through high-strength spiral shell
Bolt connects upper junction plate, single order mainboard, lower connecting plate；Angle steel A, angle steel B are provided with groove part difference in second level friction unit
Embedded friction plate, non-recessing part accompanies two level mainboard two-by-two added with backing plate between friction plate.The damper can be according to earthquake
The seismic response of intensity and engineering structure, power consumption cell operation state is automatically adjusted, there is good energy dissipation capacity, construction letter
It is single, cheap.
The technical solution adopted for the present invention to solve the technical problems is：Single order high-strength bolt, upper junction plate, upper friction
Plate, single order mainboard, lower friction plate, lower connecting plate, angle steel A, angle steel B, friction plate, second order mainboard, second order high-strength bolt and backing plate；
The single order high-strength bolt, the upper junction plate, the upper friction plate, the single order mainboard, the lower friction plate and it is described under
Connecting plate forms single order friction element, and the single order mainboard is located at the upper junction plate, among the lower connecting plate, it is described on rub
Wiping board, the lower friction plate are pasted on upper junction plate groove and lower connecting plate groove with epoxy resin respectively, and the single order is high
Strength bolt is applied through coaxial upper junction plate bolt hole, single order mainboard spacing hole, lower connecting plate bolt hole by nut
Pressure adjusts the friction damping force of single order friction element；The angle steel A, the angle steel B, the friction plate, the second order master
Plate, the second order high-strength bolt and backing plate form second order friction element, and the second order mainboard is sandwiched in the angle steel A, the angle steel B
Between, the friction plate is pasted in angle steel A grooves and angle steel B grooves using epoxy resin, and the second order high-strength bolt passes through
Side angle steel A bolts hole, angle steel B bolts hole and the connection of backing plate bolt hole, pressure is applied by nut and rubbed to adjust second order
The friction damping force of unit is wiped, the angle steel A, the non-recessing sides of the angle steel B accompany the backing plate, the second order high-strength bolt
Connected through side angle steel A bolts hole, angle steel B bolts hole and backing plate bolt hole；By angle steel A, angle steel B and upper junction plate, lower company
Fishplate bar welds, and reaches the purpose of series connection single order friction element and second order friction element.
A kind of second order frcition damper shock-dampening method, comprises the following steps：1. first assembling single order friction element, single order is high-strength
Bolt, upper junction plate, upper friction plate, single order mainboard, lower friction plate and lower connecting plate form single order friction element, single order mainboard position
Among upper junction plate, lower connecting plate, upper friction plate, lower friction plate be pasted on respectively with epoxy resin upper junction plate groove and under
Connecting plate groove, single order high-strength bolt pass through coaxial upper junction plate bolt hole, single order mainboard spacing hole, lower connecting plate bolt
Hole, pressure is applied by nut to adjust the friction damping force of single order friction element；2. then assembling second order friction element,
Angle steel A, angle steel B, friction plate, second order mainboard, second order high-strength bolt and backing plate form second order friction element, and second order mainboard is sandwiched in angle
Between steel A, angle steel B, friction plate is pasted in angle steel A grooves and angle steel B grooves using epoxy resin, and second order high-strength bolt passes through
Coaxial angle steel A bolts hole, angle steel B bolts hole, friction plate bolt hole and the connection of second order mainboard spacing hole, meanwhile, angle steel A, institute
State the non-recessing sides of angle steel B and accompany the backing plate, second order high-strength bolt passes through side angle steel A bolts hole, angle steel B bolts hole and pad
Crab bolt hole connects, and applies pressure by nut to adjust the friction damping force of second order friction element；3. single order is rubbed
Unit and the welding of second order friction element, reach the purpose of series connection single order friction element and second order friction element；4. second order is rubbed
The single order mainboard end of damper and upper support are bolted, upper support and steel column welding, second order frcition damper
Second order mainboard end and lower support be bolted, lower support and girder steel welding；5. adjust single order friction element one
Rank high-strength bolt pretightning force and second order friction element second order high-strength bolt pretightning force, single order high-strength bolt pretightning force correspond to small shake lotus
Carry, the corresponding big shake load of second order high-strength bolt pretightning force；6. when external force has rubbed sliding power less than single order, single order friction element is not
Start；7. when external force more than or equal to single order rubbed sliding power and less than second order rubbed cunning power when, single order mainboard relatively on rub
Wiping board and the motion of lower friction plate, and single order mainboard is transported in the case where single order mainboard spacing hole limits with single order high-strength bolt along linear reciprocation
It is dynamic.Single order friction means start, and consume energy；8. when external force has rubbed sliding power more than or equal to second order, second order mainboard is relative to rub
Wiping board moves, and second order mainboard is under second order mainboard spacing hole and the limitation of second order high-strength bolt along straight reciprocating motion, single order and two
Rank friction element consumes energy simultaneously.
The present invention beneficial implementation result be：Second order frcition damper can be rung according to the ground of earthquake intensity and engineering structure
Answer the working condition of adjust automatically power consumption unit.It is simple structure, cheap with good energy dissipation capacity.
Brief description of the drawings
Fig. 1 is second order frcition damper schematic diagram of the present invention.
Fig. 2 is cutting single order friction element schematic diagram in Fig. 1.
Fig. 3 is single order friction element schematic diagram in Fig. 1.
Fig. 4 is that Fig. 3 splits schematic diagram.
Fig. 5 is upper junction plate schematic diagram in Fig. 2.
Fig. 6 is single order mainboard schematic diagram in Fig. 2.
Fig. 7 is second order friction element schematic diagram in Fig. 1.
Fig. 8 is that Fig. 7 splits schematic diagram.
Fig. 9 is angle steel A schematic diagrames in Fig. 7.
Figure 10 is angle steel B schematic diagrames in Fig. 7.
Figure 11 is backing plate schematic diagram in Fig. 7.
Figure 12 is second order mainboard schematic diagram in Fig. 7.
Figure 13 is friction plate schematic diagram in Fig. 7.
Figure 14 is second order frcition damper and steel structure connection schematic diagram.
In figure：1-single order high-strength bolt, 2-upper junction plate, 3-upper friction plate, 4-single order mainboard, 5-lower friction plate,
6-lower connecting plate, 7-angle steel A, 8-angle steel B, 9-friction plate, 10-second order mainboard, 11-second order high-strength bolt, 12-pad
Plate, 501-upper junction plate groove, 502-upper junction plate bolt hole, 601-single order mainboard spacing hole, 901-angle steel A grooves,
902-angle steel A bolts hole, 1001-angle steel B grooves, 1002-angle steel B bolts hole, 1101-backing plate bolt hole, 1201-two
Rank mainboard spacing hole, 1301-friction plate bolt hole, 13-girder steel, 14-upper support, 15-second order frcition damper, 16-
Steel column, 17-lower support.
Embodiment
With reference to technical scheme and accompanying drawing, the invention will be further described in detail.
Building structure is analyzed under small shake and big shake effect respectively, second order frictional damping is set according to analysis result
The size and parameter of device.
According to Fig. 1, Fig. 2, the second order frcition damper by single order high-strength bolt 1, upper junction plate 2, upper friction plate 3,
Single order mainboard 4, lower friction plate 5, lower connecting plate 6, angle steel A7, angle steel B8, friction plate 9, second order mainboard 10, second order high-strength bolt
11st, backing plate 12 forms.
As shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6.Single order friction element is by single order high-strength bolt 1, upper junction plate 2, upper friction plate
3rd, single order mainboard 4, lower friction plate 5, lower connecting plate 6 form.Single order mainboard 4 is located at upper junction plate 2, among lower connecting plate 6, above rubs
Wiping board 3, lower friction plate 5 are pasted on upper junction plate groove 501 and lower connecting plate groove, the high-strength spiral shell of single order with epoxy resin respectively
Bolt 1 connects through coaxial upper junction plate bolt hole 502, single order mainboard spacing hole 601, lower connecting plate bolt hole and provides precompressed
Power.When external force has been more than sliding power, the relatively upper friction plate 3 of single order mainboard 4, lower friction plate 5 produce relative slip, consume energy.
As shown in Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12 and Figure 13.Second order friction element by angle steel A7, angle steel B8, rub
Wiping board 9, second order mainboard 10, second order high-strength bolt 11 and backing plate 12 form.Friction plate 9 is respectively embedded into angle steel A grooves 901 and angle steel
B grooves 1001, and cemented with epoxide-resin glue, second order mainboard 10 is accompanied between friction plate 9, non-recessing part accompanies backing plate
12.Second order high-strength bolt 11 is each passed through coaxial angle steel A bolts hole 902, angle steel B bolts hole 1002, the bolt hole of friction plate 9
1301st, second order mainboard spacing hole 1201.Angle steel A7, angle steel B8, friction plate 9, second order mainboard 10 are connected and precompression is provided.Together
When high-strength bolt 11 through angle steel A bolts hole 902, angle steel B bolts hole 1002, backing plate bolt hole 1101, connect, purpose makes
Angle steel A7, angle steel B 8 cooperate.
Single order friction element is integrally inserted into the non-recessing side 120mm of second order friction element, and angle steel A, angle steel B is non-
Recessing side bottom is welded with single order friction element upper junction plate 2, lower connecting plate 6 with single order friction element and the second order friction of connecting
Unit.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, upper junction plate 2 constructs identical with lower connecting plate 6.Upper friction plate 3 is with
Friction plate 5 constructs identical.
As shown in Fig. 6, Figure 12, single order mainboard spacing hole 601, second order mainboard spacing hole 1201, size is identical, total length 34mm
The a diameter of 14.5mm of both ends semi arch, its size determine spacing displacement, and energy dissipation capacity how much.Upper junction plate bolt hole
502, angle steel A bolt hole 902, angle steel B bolts hole 1002, backing plate bolt hole 1101, the size of friction plate bolt hole 1301 is identical, directly
Footpath is 14.5mm.
Upper friction plate 3, lower friction plate 5, friction plate 9 use asbestos less friction plate, and thickness is 3mm.
As shown in Fig. 5, Fig. 9, Figure 10, the groove 501 of upper junction plate 2, the groove of lower connecting plate 6, one layer of asphalt mixtures modified by epoxy resin is brushed respectively
Fat glue, then upper friction plate 3 is embedded in the groove 501 of upper junction plate 2, lower friction plate 5 is embedded in the groove of lower connecting plate 6.Similarly, angle steel A
Groove 901, angle steel B grooves 1001, one layer of epoxide-resin glue is brushed, then friction plate 9 is embedded into angle steel A grooves 901, angle
Steel B grooves 1001.
As shown in figure 11, the end of single order mainboard 2 of second order frcition damper and upper support 14 are bolted, top
Support 14 and steel column 16 are welded, and the end of second order mainboard 10 of second order frcition damper and lower support 17 are bolted, under
Portion's support 17 and girder steel 13 weld.
Compared with conventional friction damper, this damper considerably increases damping by single order of connecting, second order friction element
Device consumes energy.Conventional friction damper can only consume energy under macroseism, often provide greater stiffness to recurrent medium and small shake, increase
Geological process, increase structural earthquake acceleration sometimes, bring discomfort.This damper can by high-strength bolt precompression,
Sliding power is adjusted.Middle or small shake acts on lower single order friction element when starting single order friction element, greatly shake and second order friction element simultaneously
Work.
Above-mentioned single order and second order high-strength bolt pretightning force can according to needed for structural seismic when small shake and big shake different damping point
Do not determine.
Shock-dampening method using second order frcition damper comprises the following steps：
1. first assemble single order friction element, single order high-strength bolt 1, upper junction plate 2, upper friction plate 3, single order mainboard 4, under rub
Wiping board 5 and lower connecting plate 6 form single order friction element, and single order mainboard 4 is located at upper junction plate 2, among lower connecting plate 6, upper friction
Plate 3, lower friction plate 5 are pasted on upper junction plate groove 501 and lower connecting plate groove, single order high-strength bolt with epoxy resin respectively
1, through coaxial upper junction plate bolt hole 502, single order mainboard spacing hole 601, lower connecting plate bolt hole, is applied by nut
Plus-pressure adjusts the friction damping force of single order friction element.
2. and then assemble second order friction element, angle steel A7, angle steel B8, friction plate 9, second order mainboard 10, second order high-strength bolt
11 and backing plate 12 form second order friction element, second order mainboard 10 is sandwiched between angle steel A7, angle steel B8, and friction plate 9 uses asphalt mixtures modified by epoxy resin
Fat is pasted in angle steel A grooves 901 and angle steel B grooves 1001, and second order high-strength bolt 11 passes through coaxial angle steel A bolts hole
902nd, angle steel B bolts hole 1002, friction plate bolt hole 1301 and second order mainboard spacing hole 1201 connect, meanwhile, it is angle steel A7, described
The non-recessing sides of angle steel B8 accompany the backing plate 12, and second order high-strength bolt 11 passes through side angle steel A bolts hole 902, angle steel B bolts
Hole 1002 and backing plate bolt hole 1101 connect, and apply pressure by nut to adjust the frictional damping of second order friction element
Power.
3. single order friction element and second order friction element are welded, reach series connection single order friction element and second order friction element
Purpose.
4. the end of single order mainboard 4 of second order frcition damper and upper support 14 are bolted, upper support 14
Welded with steel column 16, the end of second order mainboard 10 of second order frcition damper and lower support 17 are bolted, lower support
17 and girder steel 13 weld.
5. adjust the pretightning force of single order friction element single order high-strength bolt 1 and the pretension of second order friction element second order high-strength bolt 11
Power, the pretightning force of single order high-strength bolt 1 correspond to small shake load, the corresponding big shake load of the pretightning force of second order high-strength bolt 11.
6. when external force has rubbed sliding power less than single order, single order friction element is not actuated.
7. when external force more than or equal to single order rubbed sliding power and less than second order rubbed cunning power when, single order mainboard 4 is relative
Upper friction plate 3 and lower friction plate 5 move, and single order mainboard 4 is in the case where single order mainboard spacing hole 601 and single order high-strength bolt 1 limit
Along straight reciprocating motion.Single order friction means start, and consume energy.
8. when external force has rubbed sliding power more than or equal to second order, the Relative friction plate 9 of second order mainboard 10 moves, second order mainboard 10
It is same along straight reciprocating motion, single order and second order friction element in the case where second order mainboard spacing hole 1201 and second order high-strength bolt 11 limit
When consume energy.
Claims (2)
- A kind of 1. second order frcition damper, it is characterised in that including：Single order high-strength bolt (1), upper junction plate (2), upper friction plate (3), single order mainboard (4), lower friction plate (5), lower connecting plate (6), angle steel A (7), angle steel B (8), friction plate (9), second order mainboard (10), second order high-strength bolt (11) and backing plate (12)；It is the single order high-strength bolt (1), the upper junction plate (2), the upper friction plate (3), the single order mainboard (4), described Lower friction plate (5) and the lower connecting plate (6) form single order friction element, and the single order mainboard (4) is located at the upper junction plate (2), among the lower connecting plate (6), the upper friction plate (3), the lower friction plate (5) are pasted on respectively with epoxy resin Connecting plate groove (501) and lower connecting plate groove, the single order high-strength bolt (1) pass through coaxial upper junction plate bolt hole (502), single order mainboard spacing hole (601), lower connecting plate bolt hole, it is single to adjust single order friction to apply pressure by nut The friction damping force of member；The angle steel A (7), the angle steel B (8), the friction plate (9), the second order mainboard (10), the second order high-strength bolt (11) and backing plate (12) forms second order friction element, and the second order mainboard (10) is sandwiched in the angle steel A (7), the angle steel B (8) Between, the friction plate (9) is pasted in angle steel A grooves (901) and angle steel B grooves (1001) using epoxy resin, and described two Rank high-strength bolt (11) passes through coaxial angle steel A bolts hole (902), angle steel B bolts hole (1002), friction plate bolt hole (1301) And second order mainboard spacing hole (1201) connection, meanwhile, the angle steel A (7), the angle steel B (8) are non-, and recessing side accompanies the pad Plate (12), the second order high-strength bolt (11) pass through side angle steel A bolts hole (902), angle steel B bolts hole (1002) and backing plate spiral shell Keyhole (1101) connects, and applies pressure by nut to adjust the friction damping force of second order friction element；Angle steel A (7), angle steel B (8) and upper junction plate (2), lower connecting plate (6) are welded, reach series connection single order friction element and two The purpose of rank friction element.
- 2. a kind of second order frcition damper shock-dampening method, it is characterised in that comprise the following steps：1. first assemble single order friction element, single order high-strength bolt (1), upper junction plate (2), upper friction plate (3), single order mainboard (4), Lower friction plate (5) and lower connecting plate (6) form single order friction element, and single order mainboard (4) is located at upper junction plate (2), lower connecting plate (6) among, upper friction plate (3), lower friction plate (5) are pasted on upper junction plate groove (501) and lower connection with epoxy resin respectively Plate groove, single order high-strength bolt (1) through coaxial upper junction plate bolt hole (502), single order mainboard spacing hole (601), under Connecting plate bolt hole, pressure is applied by nut to adjust the friction damping force of single order friction element；2. then assembling second order friction element, angle steel A (7), angle steel B (8), friction plate (9), second order mainboard (10), second order are high-strength Bolt (11) and backing plate (12) form second order friction element, and second order mainboard (10) is sandwiched between angle steel A (7), angle steel B (8), rub Plate (9) is pasted in angle steel A grooves (901) and angle steel B grooves (1001) using epoxy resin, and second order high-strength bolt (11) passes through Coaxial angle steel A bolts hole (902), angle steel B bolts hole (1002), friction plate bolt hole (1301) and second order mainboard spacing hole (1201) connect, meanwhile, angle steel A (7), the non-recessing sides of the angle steel B (8) accompany the backing plate (12), second order high-strength bolt (11) through side angle steel A bolts hole (902), angle steel B bolts hole (1002) and backing plate bolt hole (1101) connection, nut is passed through Screw and apply pressure to adjust the friction damping force of second order friction element；3. single order friction element and second order friction element are welded, reach the mesh of series connection single order friction element and second order friction element 's；4. single order mainboard (4) end of second order frcition damper and upper support (14) are bolted, upper support (14) welded with steel column (16), second order mainboard (10) end of second order frcition damper and lower support (17) are connected by bolt Connect, lower support (17) and girder steel (13) welding；5. adjust single order friction element single order high-strength bolt (1) pretightning force and second order friction element second order high-strength bolt (11) pretension Power, single order high-strength bolt (1) pretightning force correspond to small shake load, the corresponding big shake load of second order high-strength bolt (11) pretightning force；6. when external force has rubbed sliding power less than single order, single order friction element is not actuated；7. when external force more than or equal to single order rubbed sliding power and less than second order rubbed cunning power when, single order mainboard (4) relatively on Friction plate (3) and lower friction plate (5) motion, and single order mainboard (4) is in single order mainboard spacing hole (601) and single order high-strength bolt (1) start, consume energy along straight reciprocating motion, single order friction means under limiting；8. when external force has rubbed sliding power more than or equal to second order, second order mainboard (10) Relative friction plate (9) motion, second order mainboard (10) rubbed under second order mainboard spacing hole (1201) and second order high-strength bolt (11) limitation along straight reciprocating motion, single order and second order Unit is wiped to consume energy simultaneously.
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| CN201610572825.XA CN106013922B (en) | 2016-07-19 | 2016-07-19 | A kind of second order frcition damper and shock-dampening method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108086510A (en) * | 2017-12-13 | 2018-05-29 | 同济大学 | The complete double ranks of assembled slide damper |
| CN108612217B (en) * | 2018-05-11 | 2020-02-14 | 山东大学 | Super-elastic shape memory alloy-friction energy consumption series composite damper |
| CN113123478A (en) * | 2021-03-09 | 2021-07-16 | 河北工业大学 | Friction unit of supporting structure and friction energy dissipation supporting structure with multiple friction units connected in series |
| CN113175260A (en) * | 2021-05-12 | 2021-07-27 | 镇江知名建设工程有限公司 | Support type staged friction damper |
| CN113585849B (en) * | 2021-08-11 | 2022-07-26 | 四川大学 | Two-stage friction damper |
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| JP3872934B2 (en) * | 2000-05-26 | 2007-01-24 | 積水ハウス株式会社 | Friction damper and wall body using the same |
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| CN103410238A (en) * | 2013-05-23 | 2013-11-27 | 上海大学 | Multidirectional friction tensile damper |
| CN204401817U (en) * | 2015-01-15 | 2015-06-17 | 武汉理工大学 | There is the passive variable friction dampers of two-stage friction power |
| CN205875865U (en) * | 2016-07-19 | 2017-01-11 | 天津职业技术师范大学 | Second order friction damper |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3872934B2 (en) * | 2000-05-26 | 2007-01-24 | 積水ハウス株式会社 | Friction damper and wall body using the same |
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| KR101127718B1 (en) * | 2010-06-24 | 2012-03-22 | 동일고무벨트주식회사 | Hybrid vibration control apparatus using viscoelasticity and friction |
| CN103410238A (en) * | 2013-05-23 | 2013-11-27 | 上海大学 | Multidirectional friction tensile damper |
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