CN202850118U - Pendulum support water tank damper - Google Patents
Pendulum support water tank damper Download PDFInfo
- Publication number
- CN202850118U CN202850118U CN 201220520551 CN201220520551U CN202850118U CN 202850118 U CN202850118 U CN 202850118U CN 201220520551 CN201220520551 CN 201220520551 CN 201220520551 U CN201220520551 U CN 201220520551U CN 202850118 U CN202850118 U CN 202850118U
- Authority
- CN
- China
- Prior art keywords
- water tank
- damper
- bearing
- support
- pendulum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The utility model provides a pendulum support water tank damper and belongs to the technical field of civil engineering structure energy dissipation and vibration reduction. The pendulum support water tank damper comprises a plurality of pendulum sliding supports, a water tank, a damper support, a box column and a viscous damper. Each pendulum sliding support comprises a support upper plate, a metal ball and a support lower plate. The support upper plates are fixed on the lower surface of the water tank. The support lower plates are fixed on a structure upper top plate or a bearing beam. The support upper plates and the support lower plates are arranged opposite, and the metal balls are arranged between the support upper plates and the support lower plates to achieve relative sliding of the support upper plates and the support lower plates. The box column is arranged at the bottom of the water tank. The damper support is installed on the structure upper top plate or the bearing beam. The viscous damper is horizontally arranged between the box column and the damper support. According to the pendulum support water tank damper, on one hand, adverse effect of the high-rise water tank under horizontal load on the structure is eliminated, and on the other hand, a water tank damper system greatly reduces power response of the structure under the horizontal load. In addition, the pendulum support water tank damper is stable in damping effect, simple in structure, safe, reliable, good in durability and strong in designability.
Description
Technical field
The utility model belongs to civil engineering structure energy-eliminating shock-absorbing technical field, particularly a kind of rocker bearing water tank damper that utilizes top of high-rise buildings water tank control vibration of building, reduces structural response under wind load and the seismic load.
Background technology
For highrise building, because the needs of the aspects such as life, production, fire-fighting, usually need to be at structural top facility water tank.The quality of water tank surpasses tens tons even ton up to a hundred usually, can greatly strengthen the vibratory response of structure under horizontal loading under the common mounting means, and is very unfavorable to the vibration damping antidetonation of building.On the other hand, tuned mass damper has obtained using more and more widely as a kind of energy-eliminating shock-absorbing device in recent years, and its good effectiveness in vibration suppression has also obtained a large amount of engineering verifications.
The tuned mass damper system need to install larger quality as subsystem so that structure is applied dynamic effect, and for highrise building, the water tank that is positioned at the high-level structure top is the desirable quality source of tuned mass damper system just.By special mounting means, allow the water tank on highrise building top and the horizontal relative motion between the structure, additional suitable damping, and be aided with corresponding construction measure, can be used as tuned mass damper highrise building is carried out effective vibration isolation.This method has been eliminated high-rise water tank adverse effect to structure under horizontal loading on the one hand, and the water tank damping system that consists of on the other hand will reduce the dynamic response of structure under horizontal loading greatly, improves the anti-seismic performance of highrise building.At present, this technology has obtained more application in developed countries such as Japan, the U.S., and from the situation of practical application, this technology is significantly to the damping effect of structure, has vast potential for future development.
Existing water tank damping system is divided into two kinds of vibration isolating suspension formula and suspension types.Vibration isolating suspension formula water tank damping system is the vibration isolating suspension in types such as water tank bottom installation lead core rubber supports.The method utilizes the horizontal rigidity of shock isolating pedestal and own damping to realize the vibration attenuation mechanism of tuned mass damper system, has simple structure, characteristics that durability is strong.But then, the effectiveness in vibration suppression of tuned mass damper system depends on its stable natural frequency, and the fundamental frequency of shock isolating pedestal formula water tank damping system is relevant with the quality of water tank.Because the water level of water tank is constantly to change, lead core rubber support is a kind of non-linear element in addition, therefore the natural frequency of shock isolating pedestal formula water tank damping system changes with the variation of cistern water level, the stable structure effectiveness in vibration suppression can't be provided, can not carry out effective design of system, its effectiveness in vibration suppression is unsatisfactory, has greatly restricted the use of such water tank damping system.
Suspension type water tank damping system hangs up water tank with ball pivot by on the structure top form of structure such as truss being set, and damper is installed and spring system carries out energy-eliminating shock-absorbing.Because water tank is made the class simple harmonic motion, its natural frequency and water tank quality are irrelevant.This method has overcome the fundamental frequency difficult problem relevant with cistern water level of water tank damping system effectively, the system that realized good effectiveness in vibration suppression under any water level.But the complex structure of the method, construction costs is high, and inconvenience is installed.Owing to the existence of the suspension property structures such as ball pivot, the durability of this technology is not high on the other hand.And in a single day suspended structure lost efficacy, and the large quality water tank that falls will destroy structure generation, causes huge potential safety hazard.Therefore, although have good and stable effectiveness in vibration suppression, the defective of suspension type water tank damping system on safety and durability seriously hindered application and the popularization of this technology.
Summary of the invention
The utility model provide a kind of simple in structure, safe and reliable, durability is strong, and fundamental frequency does not change with cistern water level, rocker bearing water tank damper with stable energy-eliminating shock-absorbing effect can solve in the prior art defective of water tank damping system and the other problems of existence preferably.
The utility model adopts technical scheme to be:
Formed by a plurality of pendulum-type sliding supports, water tank, damper bearing, box column and the viscous damper that are fixed in the building structure;
Described pendulum-type sliding support is comprised of bearing upper plate, metal ball and bearing lower plate, and the bearing upper plate is bolted the soffit that is fixed on water tank, and the bearing lower plate is bolted and is fixed on structure upper plate or the spandrel girder; Bearing upper plate and bearing lower plate are staggered relatively, and the middle metal ball of placing is to realize relative sliding between the two;
The bottom of described water tank arranges box column, on the edge, four sides of box column several damper installing holes is set highly;
Described damper bearing is installed on structure upper plate or the spandrel girder, and along highly several damper installing holes being set, its position is corresponding with the installing hole on the box column with quantity on the damper bearing;
Described damper with viscosity level is installed between box column and the damper bearing, carries out hinged at two ends by installing hole and damper installing hole.
Described a plurality of pendulum-type sliding support is symmetry and arranges.
Described bearing upper plate and bearing lower plate be shaped as circle or rectangle.
The central authorities of described bearing upper plate arrange the dome-type groove, and its radius equates with the radius of metal ball;
Described bearing lower plate is provided with spherical crown shape groove, and the groove inner ring is for swinging the workspace, and the groove outer ring is for swinging buffer area; The marginal portion of bearing lower plate is higher than the spherical crown shape groove part at center; Pendulum length when radius of sphericity corresponding to swing workspace is system's normal operation; Swing radius of sphericity corresponding to the buffer area radius of sphericity corresponding with the swing workspace and equate, or tangential radii diminishes gradually from inside to outside, but the tangential radii of the part continuous with swinging the workspace needs consistent with swing workspace radius of spherical crown.
The surface of the inner surface of the hemisphere face groove of described bearing upper plate, the surface, swing workspace of bearing lower plate and metal ball all adopts the mirror face stainless steel material of low-friction coefficient to make; The swing buffer area surface of bearing lower plate adopts common iron to make.
Described box column is to be arranged on one of the water tank bottom center, or be arranged on water tank bottom, be arranged symmetrically with a plurality of.
The utlity model has following advantage:
Rocker bearing water tank damper has been realized the consistency of system frequency to cistern water level, has stable effectiveness in vibration suppression.Water tank is made the class simple harmonic motion at the pendulum-type sliding support, and cistern water level is that the water tank quality does not affect system frequency.Accurate frequency modulation when therefore installing by system, can guarantee the utility model stable damping property in Life cycle, guarantee high-rise building outstanding resistance to shock under any water level, overcome the unmanageable difficult problem of common pedestal water tank damper vibration damping effect.
Rocker bearing water tank damper structure is simple, the distinct convenience of installation procedure.Rocker bearing water tank damper has kept the advantage aspect structure and installment of general pedestal water tank damper.For engineering component, the complexity that has reduced structure and installment that is to say guaranteed Systems balanth and with the uniformity of Theoretical Design.The utility model has been avoided its complicated design feature when keeping the stable advantage of suspension type water tank damper fundamental frequency, guaranteed the damping property of system from technique, has reduced product cost and has promoted difficulty.
Rocker bearing water tank damper durability is strong, and potential safety hazard is little.Suspension type water tank damper durability is not enough, the characteristics that potential safety hazard is large so that this technology in practical engineering application, have difficulty in walking.Design feature of the present utility model and simple and reliable construction measure have guaranteed the durability of system.And for the water tank of tens tons even up to a hundred tons, safer sliding support eliminated hang water tank fall to structure cause considerable damage may.
Designability is strong.In the rocker bearing water tank damper quantity of the quantity of the radius of gyration of pendulum-type sliding support, pendulum-type sliding support, damper with viscosity can according to the different structure characteristic have for design.And different from the one-shot forming of common pedestal water tank damper, rocker bearing water tank damper can also be adjusted according to engineering measurement resistance and the quantity of damper with viscosity easily after installation, guarantee the maximization of damping system oscillation damping and energy dissipating effect.
In sum, rocker bearing water tank damper combines the advantage of at present existing water tank damper technique, and effectively evaded major defect, the advantage such as have that effectiveness in vibration suppression is stable, simple structure, safe and reliable, durability and designability are strong, can Effective Raise high-rise building anti-seismic performance, have wide marketing and application prospect.
Description of drawings
Fig. 1 is the top view of the utility model rocker bearing water tank damper.
Fig. 2 is the A-A sectional drawing among Fig. 1.
Fig. 3 is the B-B sectional drawing among Fig. 1.
Fig. 4 is the C-C sectional drawing among Fig. 1.
Fig. 5 is the organigram of pendulum-type sliding support.
Fig. 6 is the sectional drawing one of pendulum-type sliding support.
Fig. 7 is the sectional drawing two of pendulum-type sliding support.
Fig. 8 is the sectional drawing three of pendulum-type sliding support.
Fig. 9 is the top view of pendulum-type sliding support lower plate.
Number in the figure:
1-pendulum-type sliding support; The 2-water tank; The 3-box column; 31-damper installing hole; 4-damper bearing; 41-damper installing hole; The 5-viscous damper; 11-bearing upper plate; 12-bearing lower plate; The 13-metal ball; 14-swings the workspace; 15-swings buffer area; The 16-bolt hole.
The specific embodiment
The utility model provides a kind of rocker bearing water tank damper, below in conjunction with the drawings and specific embodiments the utility model is described further.
Fig. 1 is the top view of rocker bearing water tank damper, and shown rocker bearing water tank damper is comprised of pendulum-type sliding support 1, water tank 2, box column 3, damper bearing 4 and viscous damper 5.
Pendulum-type sliding support 1 is installed on the upper plate of structure top layer, or is installed on the spandrel girder between upper plate and the pendulum-type sliding support 1.Pendulum-type sliding support 1 can be arranged according to the size of water tank 2 a plurality of, preserved symmetry during layout.
As shown in Figure 5 and Figure 6, pendulum-type sliding support 1 is comprised of bearing upper plate 11, bearing lower plate 12 and metal ball 13.Wherein bearing upper plate 11 is shaped as circle or rectangle with bearing lower plate 12, and bearing upper plate 11 is bolted and is fixed on water tank 2 soffits, and bearing lower plate 12 is bolted and is fixed on structure upper plate or the spandrel girder.Bolt hole 16 positions as shown in Figure 9.
Bearing upper plate 11 is staggered relatively with bearing lower plate 12, and the middle metal ball 13 of placing is to realize relative sliding between the two.The central authorities of bearing upper plate 11 arrange the dome-type groove, and its radius equates with the radius of metal ball 13, with the inner surface of bearing upper plate 11 spherical grooves and the close contact on metal ball 13 surfaces in the assurance sliding process.The material of the low-friction coefficient such as mirror face stainless steel is all adopted on the inner surface of bearing upper plate 11 spherical grooves and metal ball 13 surfaces, the damping that produces when reducing bearing sliding, and approximate undamped simple harmonic motion is done by the system of assurance.As shown in Figure 9, bearing lower plate 12 is provided with spherical crown shape groove, and the groove inner ring is for swinging workspace 14, the material of the low-friction coefficients such as employing mirror face stainless steel, the damping that produces during with the minimizing bearing sliding.Common iron or other friction factor are adopted generally or larger material for swinging buffer area 15 in the groove outer ring; Pendulum length when the radius of sphericity of swing workspace 14 correspondences is system's normal operation.The radius of sphericity that swings buffer area 15 correspondences can the radius of sphericity corresponding with swinging workspace 14 equate.As shown in Figure 8, swing buffer area 15 also from inside to outside tangential radii diminish gradually, but with swing part tangential radii that workspace 14 links to each other and require to slide steadily to guarantee metal ball 13 with to swing workspace 14 consistent.The soffit of metal ball 13 cuts open and is the spherical crown shape, and its corresponding radius of sphericity radius of sphericity corresponding with swinging workspace 14 equate, with realize in the sliding process both close contact.The marginal portion of bearing lower plate 12 is higher than spherical crown shape groove, to prevent that under especially big horizontal vibration, metal ball 13 skids off buffer area, causes bearing to lose efficacy and causes danger.
As shown in Figure 7, when system was vibrated under horizontal drive, bearing upper plate 11 was done simple harmonic motion with metal ball 13 together relative bearing lower plate 12.In horizontal drive hour, approximate undamped simple harmonic motion is done by the tuned mass damper system in workspace 14.When horizontal drive was larger, tuned mass damper system amplitude surpassed swing workspace 14 radiuses, suitably reduces amplitude by the frictional resistance that swings buffer area 15, helps water tank 2 to reset, and anti-locking system is out of control.When horizontal drive was excessive, panel edges can be avoided bearing upper plate 11 and metal ball 13 slippages under the bearing, avoided bearing to lose efficacy and caused danger
Except the general utility functions demand that satisfies water tank, also need guarantee the integral rigidity of water tank during water tank 2 design, to guarantee effectiveness in vibration suppression and safety.Shown in Fig. 2,3,4, water tank 2 is installed on pendulum-type sliding support 1 top, and is affixed with bearing upper plate 11, and assurance water tank 2 is done simple harmonic motion with bearing upper plate 11.Water tank 2 bottom center arrange box column 3, and box column 3 four sides can arrange many rows according to system scale, in order to horizontal viscous damper 5 to be installed along installing hole 31 highly is set.If water tank 2 is larger, also can be arranged symmetrically with a plurality of box columns 3, a plurality of viscous dampers 5 of convenient installation, and the stability in the increase water tank motion process.The height of box column 3 guarantees not scratch with structure roof in water tank 2 motion processes less than the height of pendulum-type sliding support 1.In center, water tank 2 bottoms box column 3 is set in this example, every arranges two row's installing holes 31, totally eight, four or eight viscous dampers 5 can symmetrically be installed.
Damper with viscosity 5 levels are installed between box column 3 and the damper bearing 4, carry out hinged at two ends by installing hole 31, damper installing hole 41.Engineering measurement after the quantity of damper with viscosity 5 and the damping of each damper can be installed according to system is regulated.
Certainly; arrangement form of the present utility model and usage quantity also are not limited to this example; can be in optimized selection according to engineering is actual; also can serve the same role; do not do one by one independent explanation at this; as long as based on know-why of the present utility model, all in protection category of the present utility model.
Claims (7)
1. rocker bearing water tank damper is characterized in that, is comprised of a plurality of pendulum-type sliding supports (1), water tank (2), damper bearing (4), box column (3) and the viscous damper (5) that are fixed in the building structure;
Described pendulum-type sliding support (1) is comprised of bearing upper plate (11), metal ball (13) and bearing lower plate (12), bearing upper plate (11) is bolted the soffit that is fixed on water tank (2), and bearing lower plate (12) is bolted and is fixed on structure upper plate or the spandrel girder; Bearing upper plate (11) and bearing lower plate (12) are staggered relatively, the middle metal ball (13) of placing;
The bottom of described water tank (2) arranges box column (3), on the edge, four sides of box column (3) several damper installing holes (31) is set highly;
Described damper bearing (4) is installed on structure upper plate or the spandrel girder, and damper bearing (4) is upper along highly several damper installing holes (41) being set, and its position is corresponding with the damper installing hole (31) on the box column (3) with quantity;
Described damper with viscosity (5) level is installed between box column (2) and the damper bearing (4), carries out hinged at two ends by damper installing hole (31) and damper installing hole (41).
2. rocker bearing water tank damper according to claim 1 is characterized in that, described a plurality of pendulum-type sliding supports (1) are symmetry and arrange.
3. rocker bearing water tank damper according to claim 1 is characterized in that, described bearing upper plate (11) and bearing lower plate (12) be shaped as circle or rectangle.
4. rocker bearing water tank damper according to claim 1 is characterized in that, the central authorities of described bearing upper plate (11) arrange the dome-type groove, and its radius equates with the radius of metal ball (13);
Described bearing lower plate (12) is provided with spherical crown shape groove, and the groove inner ring is for swinging the workspace, and the groove outer ring is for swinging buffer area; The marginal portion of bearing lower plate (12) is higher than the spherical crown shape groove part at center; Pendulum length when radius of sphericity corresponding to swing workspace is system's normal operation; Swing radius of sphericity corresponding to the buffer area radius of sphericity corresponding with the swing workspace and equate, or tangential radii diminishes gradually from inside to outside, and consistent with swing workspace radius of spherical crown in the tangential radii of the part continuous with swinging the workspace.
5. rocker bearing water tank damper according to claim 4, it is characterized in that, the surface, swing workspace of the inner surface of the hemisphere face groove of described bearing upper plate (11), bearing lower plate (12) and the surface of metal ball (13) all adopt the mirror face stainless steel material of low-friction coefficient to make; The swing buffer area surface of bearing lower plate (12) adopts common iron to make.
6. rocker bearing water tank damper according to claim 1 is characterized in that, the soffit of described metal ball (13) cuts open and is the spherical crown shape, and its corresponding radius of sphericity radius of sphericity corresponding with swinging workspace (14) equates.
7. rocker bearing water tank damper according to claim 1 is characterized in that, described box column (3) is for to be arranged on one of water tank (2) bottom centre position, or be arranged on water tank (2) bottom, be arranged symmetrically with a plurality of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220520551 CN202850118U (en) | 2012-10-11 | 2012-10-11 | Pendulum support water tank damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220520551 CN202850118U (en) | 2012-10-11 | 2012-10-11 | Pendulum support water tank damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202850118U true CN202850118U (en) | 2013-04-03 |
Family
ID=47981333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220520551 Expired - Fee Related CN202850118U (en) | 2012-10-11 | 2012-10-11 | Pendulum support water tank damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202850118U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995785A (en) * | 2012-10-11 | 2013-03-27 | 清华大学 | Rocker bearing water tank damper |
| CN103307196A (en) * | 2013-06-19 | 2013-09-18 | 同济大学 | Novel tuned mass damper with independent bi-direction rigidity |
| CN104563214A (en) * | 2014-12-25 | 2015-04-29 | 贵州省交通规划勘察设计研究院股份有限公司 | Tunnel firefighting system based on elevated water tank |
| CN105448484A (en) * | 2015-12-31 | 2016-03-30 | 同济大学 | Transformer with energy dissipation damping function |
| CN105484382A (en) * | 2016-01-05 | 2016-04-13 | 哈尔滨工程大学 | Swing type porous barrier energy absorption and vibration reduction water tank structure applied to nuclear power plant shield building |
| CN108953463A (en) * | 2018-09-25 | 2018-12-07 | 南京林业大学 | A kind of double guide rail TMD dissipative damping devices applied to wind power generating set |
-
2012
- 2012-10-11 CN CN 201220520551 patent/CN202850118U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995785A (en) * | 2012-10-11 | 2013-03-27 | 清华大学 | Rocker bearing water tank damper |
| CN102995785B (en) * | 2012-10-11 | 2015-06-10 | 清华大学 | Rocker bearing water tank damper |
| CN103307196A (en) * | 2013-06-19 | 2013-09-18 | 同济大学 | Novel tuned mass damper with independent bi-direction rigidity |
| CN104563214A (en) * | 2014-12-25 | 2015-04-29 | 贵州省交通规划勘察设计研究院股份有限公司 | Tunnel firefighting system based on elevated water tank |
| CN105448484A (en) * | 2015-12-31 | 2016-03-30 | 同济大学 | Transformer with energy dissipation damping function |
| CN105448484B (en) * | 2015-12-31 | 2017-12-15 | 同济大学 | A kind of transformer with energy-dissipating and shock-absorbing function |
| CN105484382A (en) * | 2016-01-05 | 2016-04-13 | 哈尔滨工程大学 | Swing type porous barrier energy absorption and vibration reduction water tank structure applied to nuclear power plant shield building |
| CN105484382B (en) * | 2016-01-05 | 2017-07-11 | 哈尔滨工程大学 | It is a kind of to wave porous barrier energy-obsorbing and damping cisten mechanism applied to nuclear power station shielding factory building |
| CN108953463A (en) * | 2018-09-25 | 2018-12-07 | 南京林业大学 | A kind of double guide rail TMD dissipative damping devices applied to wind power generating set |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102995785B (en) | Rocker bearing water tank damper | |
| CN202850118U (en) | Pendulum support water tank damper | |
| CN105971148B (en) | Universal swing track brace type tuned mass damper | |
| CN107975158B (en) | A kind of multidimensional earthquake damping and isolating mechanism | |
| CN204458973U (en) | A kind of simple liquid damping TMD | |
| EA002391B1 (en) | Earthquake protection consisting of vibration-isolated mounting of buildings and objects using vertical pendulums with long cycles | |
| CN201835397U (en) | TMD (tuned mass damper) device | |
| CN103335057A (en) | Tuned mass damper with frame | |
| CN104763056B (en) | Annular frictional rotating shockproof supporting base | |
| CN102425247A (en) | Three-dimensional tuned mass damper | |
| CN102953327A (en) | Lateral shock absorption damper suitable for bridge structure | |
| CN106012815B (en) | A kind of damping bearing of highway bridge | |
| CN102433934A (en) | Automatic-resetting multidirectional earthquake isolating bearing with C-type steel plates combined in form of Chinese character 'Mi' | |
| CN111827098B (en) | Trigger type limited negative stiffness high-strength spring damping support | |
| CN106320570B (en) | A kind of compound shear wall with easy replacement vibration damper steel plate damper | |
| CN203546592U (en) | Damper with external bridge cable | |
| CN208668261U (en) | Dish-style swing shock absorption device | |
| CN207364163U (en) | A kind of combined type three-dimensional intelligent shock-isolation bearing | |
| CN110043097B (en) | Damping ground connection shaped steel supports tuned damping support of filling quality | |
| CN209741653U (en) | Double-curved-surface spherical seismic reduction and isolation support with steel spring and damping device | |
| CN210482044U (en) | Self-anchored suspension bridge tower shock absorption structure | |
| CN210561694U (en) | Support with shock insulation device for large-span continuous beam | |
| CN201560504U (en) | Self-adaptive, multi-sphere and friction sliding vibration-isolating bearing | |
| CN215812855U (en) | Wind speed and wind direction monitoring devices suitable for bridge health monitoring | |
| CN202500086U (en) | Green shock absorption and vibration attenuation bridge tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20161011 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |