CN105604206A - Slippage seismic isolation pendulum - Google Patents
Slippage seismic isolation pendulum Download PDFInfo
- Publication number
- CN105604206A CN105604206A CN201610185185.7A CN201610185185A CN105604206A CN 105604206 A CN105604206 A CN 105604206A CN 201610185185 A CN201610185185 A CN 201610185185A CN 105604206 A CN105604206 A CN 105604206A
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- slide rail
- arc
- shaped slide
- seismic isolation
- pendulum
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a slippage seismic isolation pendulum. The slippage seismic isolation pendulum comprises an upper connection plate, a lower connection plate, a lower arc-shaped slide rail and a joint slide block, wherein a first arc surface slide groove matched with the lower arc-shaped slide rail is formed in the lower end of the joint slide block; and the lower end of the lower arc-shaped slide rail is connected with the lower connection plate. The slippage seismic isolation pendulum is characterized by further comprising an upper arc-shaped slide rail, wherein the upper arc-shaped slide rail and the lower arc-shaped slide rail are arranged in a crossed direction; a second arc surface slide groove matched with the upper arc-shaped slide rail is formed in the upper end of the joint slide block; and the upper end part of the upper arc-shaped slide rail is connected with the upper connection plate. The slippage seismic isolation pendulum provided by the invention has good seismic isolation and seismic absorption performances, can be used for effectively filtering seismic vibration energy transmitted from any direction of the earth surface, and blocking or alleviating the destructive power of earthquakes, and can be automatically reset so that the problems of large horizontal displacement and high probability of standard-exceeding pull stress of seismic isolation layers of high-rising seismic isolation buildings in a high intensity region can be solved.
Description
Technical field
The present invention relates to a kind of earthquake isolating equipment for the infringement of middle-high building isolation earthquake vibrational energy, especially a kind ofSliding and shock isolation pendulum structure.
Background technology
Earthquake brings great harm to human life's property, and up to the present, the whole world all cannot be made really earthquakeThe forecast of cutting is the important topic of pendulum in face of the people of the world so how to carry out shockproof, antidetonation. Existing seismic isolation technology is adoptedWith frame modes such as laminated rubber damping bearing, steel ball dish isolator, FPS frictional slip pendulum shock isolating pedestals, its principle is to buildBuilding the earthquake isolating equipment that thing bottom arranges horizontal flexibility, is softening structure, reduces rigidity, thus the natural vibration period of extending structure, mistakeFilter the dither composition of earthquake vibration energy (50%～90%), make the earthquake response of upper building be reduced to minimum journeyDegree, reaches the object of " isolation energy dissipation ", even if it is safe and sound that building also can be ensured under violent earthquake effect. FPSFriction-pendulum shock-insulation device technique is one of Application and Development seismic isolation technology early, is subject to domestic and international many scholars' attention, asThe improvement of conventional planar sliding system, the distinctive circular sliding surface of Friction pendulum system makes it have Self-resetting function, without setting upDamping is to concentric mechanism, and it has simple in actual applications, cheap, is not prone to the advantages such as resonance.
In the time that top-out is higher, (exceed 40 meters), especially in the time that superstructure depth-width ratio is larger, (be greater than 3.0), due toThe torsion of superstructure and rock effect under geological process, makes Seismic Isolation of Isolation Layer bight bearing or the intensive layout of bottom shock isolating pedestal districtConventionally there will be larger tension, this effect may be the principal element that causes building destruction, and this is earthquake-resistant structure designSpecification institute is unallowed. This just makes laminated rubber damping bearing, the FPS friction of extensive use in tier building shock insulation at presentThe application of slippage pendulum shock isolating pedestal in skyscraper shock insulation is extremely restricted.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of sliding and shock isolation pendulum, its earthquake isolation function admirable, effectively mistakeFilter the earthquake vibration energy that earth's surface any direction transmits, block or alleviate the destructive power of earthquake, and can automatically reset, can solveThe problem that highly seismic region shock-insulation building Seismic Isolation of Isolation Layer on the middle and senior level horizontal displacement is large, be prone to supergage tension.
The present invention adopts following technical scheme: comprise upper junction plate, lower connecting plate, arc lower slide rail and joint slide block, instituteState slide block lower end, joint and be provided with the first cambered surface chute matching with arc lower slide rail, the lower end of described arc lower slide rail and lower companyFishplate bar is connected, and it is characterized in that: also comprise a upper arc-shaped slide rail, described upper arc-shaped slide rail becomes cross to hand over arc lower slide railWrong direction setting, the upper end of described joint slide block is provided with the second cambered surface chute matching with upper arc-shaped slide rail, described upper arcThe upper end of slide rail is connected with upper junction plate.
Its principle is: apparatus of the present invention are arranged between substructure basis and top-out agent structure, earthquake vibrationWhen energy transmits, the architecture basics of bottom and and the agent structure on top between produce relative displacement, when superstructure is in earthquakeWhen effect issues raw horizontal displacement, joint slide block, along with original equilibrium position is left in the motion of superstructure, makes Seismic Isolation of Isolation Layer simultaneouslyAbove structure generation slightly moves upward along arc lower slide rail cambered surface, and gravity upwards and level disappear to the common acting of frictional forceConsumption seismic energy; In the time that geological process finishes, superstructure is under gravity laod effect, automatic along shock insulation pendulum orthogonal slidewayReset, get back to original equilibrium position, thereby alleviate the absolute acceleration earthquake response of superstructure, reduce each layer of superstructureSeismic shear reaction, reduces each layer earthquake stratified deformation of superstructure and reacts, and reaches that greatly to improve superstructure seismic safety superfluousThe object of remaining.
A kind of improvement is that described joint slide block is provided with upper and lower two pairs of left-hand thread mechanisms. This mechanism rubs for overcoming traditional slippageWipe the shortcoming that pendulum shock isolation system can not bear vertical tension, upper arc-shaped slide rail, arc lower slide rail are by upper junction plate, lower connecting plateBe connected with upper body structure and basis, bottom respectively, by the connection of joint slide block, upper arc-shaped slide rail and arc lower slide railCan move by orthogonal, the slide block edge of a wing, joint is provided with two pairs of left-hand thread mechanisms (every a pair of left and right of upper and lower orthogonal concave structureBe symmetrical arranged), two pairs of left-hand thread mechanisms match with upper arc-shaped slide rail, arc lower slide rail respectively, and left-hand thread mechanism both can ensure structureThe spatial movement of top under shock effect spatially, can ensure again vibration-isolating system steady operation under geological process, reach toAnti-because generation " flexural deformation " under the large shake effect of superstructure makes may produce in structural edge or bight shock insulation pendulum bearing" lift from " greatly the object of pulling force. If the larger tilting moment of the above structure generation of Seismic Isolation of Isolation Layer under shock effect spatially, everyIn shake layer edge or bight bearing, produce " lifting from " pulling force upwards, the left-hand thread machine between joint slide block and upper and lower two slide railsStructure starts to play a role, and makes producing pulling force between two connecting plates up and down but vertical displacement not occurring of shock insulation pendulum, ensures topCan there is not double swerve in structure, guarantee the overturning stability of superstructure, and effectively overcoming existing shock insulation pendulum device cannot bearThe shortcoming of larger pulling force. When concrete engineering application, can establish pointedly according to the superstructure with different earthquake reaction characteristicsCount the curvature of lower arcuate surface on the radian of upper and lower arc-shaped slide rail and joint slide block, and control joint shoe surface and arc-shaped slide railBetween coefficient of friction, make damping and isolation effect reach best.
Another kind of improvement is that two working faces up and down of described joint slide block are covered with one deck polytetrafluoroethylene (PTFE) composite bed. ThisPlant structure and there is the advantages such as self-lubricating ability is high, wearability good, compression strength is high, long service life.
Also having a kind of improvement is that the horizontal direction two ends of described upper arc-shaped slide rail are provided with the first postive stop baffle, described lower arcThe horizontal direction two ends of shape slide rail are provided with the second postive stop baffle. This structure object is set and is to prevent rarely occurred earthquake effectLower shock isolation system lost efficacy, and when design, by upper and lower arc-shaped slide rail two ends are set, postive stop baffle was set, and realized at rarely occurred earthquake and doingWith under safe operation.
For further proving the feasibility of sliding and shock isolation pendulum of the present invention, we have carried out test inspection to structure self-vibration characteristicSurvey.
Be one of dynamic characteristics of structure natural vibration period, and the suffered power excitation of its size and structure has nothing to do, and only depends onIn quality and the rigidity of structure. There are very important impact the vibration shape of structure and natural vibration period for the kinematic analysis of structure. WithThe moving spy of structure self-vibration in two kinds of situations of isolation structure is put in the non-isolation structure and the slippage of the present invention that obtain for shaketalle test downProperty.
The non-isolation structure of table 1 and high-strength pulling-resisting slippage pendulum isolation structure natural vibration period (S)
The natural vibration period of non-isolation structure is very short, and the rigidity of description architecture is very large, and this just makes the seismic acceleration of structure anti-Should it be identical with substrate input acceleration. High-strength pulling-resisting slippage pendulum isolation structure, its level to the cycle be 2.56301S, verticalCycle is that 0.91534S has effectively avoided the predominant period, has greatly reduced structure the possibility of resonance occurs, thereby effectively reducedStructural seismic response.
The contrast of shaketalle test result
When shaketalle test, it is identical for the reaction of non-isolation structure seismic acceleration and substrate input acceleration, high-strength pulling-resisting cunningMove pendulum isolation structure and can effectively reduce the acceleration response of structure.
Table 2 high-strength pulling-resisting slippage pendulum isolation structure top layer acceleration response peak value
Can find out that from above-mentioned experimental result high-strength pulling-resisting slippage pendulum shock isolating pedestal has very good isolating affection. High-strength pulling-resistingThe level of slippage pendulum vibration-isolating system to acceleration can be controlled in ground input level acceleration 25% in, high-strength pulling-resisting slippagePendulum vibration-isolating system vertical acceleration can be controlled in ground input vertical acceleration 50% in.
The horizontal displacement reaction of Seismic Isolation of Isolation Layer
Table 3 high-strength pulling-resisting slippage pendulum isolation structure Seismic Isolation of Isolation Layer displacement response peak value
Shock isolating pedestal level is 591.1mm to maximum displacement as can be seen from the above table, and vertical maximum displacement is 54.82mm, accordinglyCan provide theoretical foundation for the size design of high-strength pulling-resisting slippage pendulum shock isolating pedestal.
High-strength pulling-resisting slippage pendulum isolation structure analysis of Overturning Stability
Taking worst superstructure as the floating stability against overturning of pagoda as example inspection high-strength pulling-resisting slippage pendulum isolation structure of putting.If such structural safety, can ensure the seismic safety of other class formations.
Structure adopts after sliding isolation, and whole superstructure system is in the floating state resting on pedestal sliding layer, BuddhistTower is also not vertical constraint between layers, resists tilting moment in earthquake, can only rely on the effective weight of self to provide,For thick short structure, the stabilizing moment generally self providing is enough to antidumping, and for thin and tall structure, they self weightJust may there is the situation that can not meet the demands in power stabilizing moment, thereby they have the danger of toppling while causing earthquake.
Structure is toppled in earthquake, is a very complicated dynamic response process, and it is not only with ground motionVarious characteristics is relevant, and the constraints of isostructure itself, depth-width ratio and size are relevant. Regularity for it is recognizedKnow, be a unsolved very thorny difficult problem still in the world so far always. Sure but there is a bit, i.e. structure when earthquakeAs long as the tilting moment that maximum horizontal inertia force produces is not more than total this adequate condition of antidumping moment of structure, just can notThe problem of toppling. Although whether this adequate condition, for structure, the judgement that earthquake topples over occurs is very conservative, working asIn the situation that front dynamic response criterion of toppling about structural earthquake is not yet come out, it is to be perfectly safe with reliably.
Structural entity analysis of Overturning Stability
As long as the tilting moment that during according to earthquake, the maximum horizontal inertia force of structure produces is not more than total anchorage of structureThis adequate condition of square, with regard to the problem of can not toppling.
The present invention has the following advantages:
Shaketalle test and correlation values sunykatuib analysis result show, slippage pendulum shock isolation system of the present invention, can make after shock insulationStructural system is avoided the predominant period of earthquake motion effectively, greatly reduces structure and dimensionally under shock effect, class resonance is occurringThe possibility of phenomenon, thus structural seismic response effectively reduced, reach protection by the object of shock insulation seismic target earthquakes safety. Its level toAcceleration can be controlled in ground input level acceleration 25% in, vertical acceleration can be controlled in that ground input is vertical to be acceleratedDegree 50% in, thereby shown that the present invention has obvious isolating affection. Slippage pendulum isolation structure stability against overturning of the present inventionAnalysis shows: structural entity stability against overturning and structure partial stability against overturning are good, and this earthquake isolating equipment can effectively be protectedThe safety of superstructure under rarely occurred earthquake effect.
Marginal data
Fig. 1 is the perspective view of an embodiment of the present invention.
Fig. 2 is the perspective view of joint slide block.
Fig. 3 is top layer force diagram.
Fig. 4 is remainder layer force diagram.
In figure: upper junction plate 1, lower connecting plate 2, arc lower slide rail 3, joint slide block 4, the first cambered surface chutes 5, upper arc is slidingRail 6, the second cambered surface chutes 7, left-hand thread mechanism 8, the first postive stop baffle 9, the second postive stop baffles 10.
Detailed description of the invention
As shown in Figures 1 to 4, an embodiment of the present invention comprises upper junction plate 1, lower connecting plate 2, arc lower slide rail 3 andJoint slide block 4, slide block 4 lower ends, described joint are provided with the first cambered surface chute 5 matching with arc lower slide rail 3, described arc lowerThe lower end of slide rail 3 is connected with lower connecting plate 2, it is characterized in that: also comprise a upper arc-shaped slide rail 6, described upper arc-shaped slide rail 6With the setting of 3 one-tenth cross alternate directions of arc lower slide rail, the upper end of described joint slide block 4 is provided with upper arc-shaped slide rail 6 and matchesThe second cambered surface chute 7, the upper end of described upper arc-shaped slide rail 6 is connected with upper junction plate 1.
Its principle is: apparatus of the present invention are arranged between substructure basis and top-out agent structure, earthquake vibrationWhen energy transmits, the architecture basics of bottom and and the agent structure on top between produce relative displacement, when superstructure is in earthquakeWhen effect issues raw horizontal displacement, joint slide block 4, along with original equilibrium position is left in the motion of superstructure, makes Seismic Isolation of Isolation Layer simultaneouslyAbove structure generation slightly moves upward along arc lower slide rail 3 cambered surfaces, and gravity and level are upwards done work jointly to frictional forceEarthquake energy; In the time that geological process finishes, superstructure is under gravity laod effect, along shock insulation pendulum orthogonal slideway certainlyMoving reset, gets back to original equilibrium position, thereby alleviates the absolute acceleration earthquake response of superstructure, reduces superstructure eachThe reaction of layer seismic shear, reduces each layer of earthquake stratified deformation reaction of superstructure, reaches and greatly improves superstructure seismic safetyThe object of redundancy.
As shown in Figure 1 and Figure 2, a kind of improvement is that described joint slide block 4 is provided with upper and lower two pairs of left-hand thread mechanisms 8. This mechanism isThe shortcoming that can not bear vertical tension for overcoming traditional sliding friction pendulum shock isolation system, upper arc-shaped slide rail, arc lower slide rail pass throughUpper junction plate, lower connecting plate are connected with upper body structure and basis, bottom respectively, by the connection of joint slide block 4, and upper arcShape slide rail 6 can move by orthogonal with arc lower slide rail 3, and slide block 4 edges of a wing in joint are provided with two of upper and lower orthogonal concave structureTo every a pair of being symmetrical set of the 8(of left-hand thread mechanism), the two pairs of left-hand thread mechanisms 8 respectively with upper arc-shaped slide rail 6, arc lower slide rail 3 phasesCoupling, left-hand thread mechanism 8 both can ensure the spatial movement of structure top under shock effect spatially, can ensure that again vibration-isolating system existsSteady operation under geological process, reaches opposing and makes structural edge or angle owing to there is " flexural deformation " under the large shake effect of superstructureIn portion's shock insulation pendulum bearing, may produce the object of large " lifting from " pulling force. If more than Seismic Isolation of Isolation Layer tied under shock effect spatiallyStructure produces larger tilting moment, produces " lifting from " pulling force upwards in Seismic Isolation of Isolation Layer edge or bight bearing, joint slide block 4 withLeft-hand thread mechanism 8 between upper and lower two slide rails starts to play a role, and what make shock insulation pendulum produces pulling force between two connecting plates up and downBut there is not vertical displacement, ensure that double swerve can not occur superstructure, guarantee the overturning stability of superstructure, effective gramTake the shortcoming that existing shock insulation pendulum device cannot bear larger pulling force. When concrete engineering application, can be according to thering is different earthquake reactionThe superstructure of feature designs the curvature of lower arcuate surface on the radian of upper and lower arc-shaped slide rail and joint slide block 4 pointedly, andControl the coefficient of friction between slide block 4 surfaces, joint and arc-shaped slide rail, make damping and isolation effect reach best.
Another kind of improvement is that two working faces up and down of described joint slide block 4 are covered with one deck polytetrafluoroethylene (PTFE) composite bed. ThisPlant structure and there is the advantages such as self-lubricating ability is high, wearability good, compression strength is high, long service life.
As shown in Figure 1 and Figure 2, also having a kind of improvement is that the horizontal direction two ends of described upper arc-shaped slide rail 6 are provided with the first limitPosition baffle plate 9, the horizontal direction two ends of described arc lower slide rail 3 are provided with the second postive stop baffle 10. This structure object is set to bePrevent shock isolation system under rarely occurred earthquake effect and lost efficacy, when design, by upper and lower arc-shaped slide rail two ends are set, limiting block is setPlate, realizes the safe operation under rarely occurred earthquake effect.
The present invention is not limited to the concrete structure of above-described embodiment, and the equivalent transformation of other homogeneous structure all falls into the present inventionProtection domain within.
Claims (4)
1. a sliding and shock isolation pendulum, comprises upper junction plate, lower connecting plate, arc lower slide rail and joint slide block, described joint slide blockLower end is provided with the first cambered surface chute matching with arc lower slide rail, and the lower end of described arc lower slide rail is connected with lower connecting plateConnect, it is characterized in that: also comprise a upper arc-shaped slide rail, described upper arc-shaped slide rail becomes cross alternate directions to establish with arc lower slide railPut, the upper end of described joint slide block is provided with the second cambered surface chute matching with upper arc-shaped slide rail, described upper arc-shaped slide rail upperEnd is connected with upper junction plate.
2. a kind of sliding and shock isolation pendulum according to claim 1, is characterized in that: described joint slide block be provided with upper and lower two pairs anti-Buckle mechanism.
3. a kind of sliding and shock isolation pendulum according to claim 2, is characterized in that: two work up and down of described joint slide blockFace is covered with one deck polytetrafluoroethylene (PTFE) composite bed.
4. a kind of sliding and shock isolation pendulum according to claim 3, is characterized in that: the horizontal direction two of described upper arc-shaped slide railEnd is provided with the first postive stop baffle, and the horizontal direction two ends of described arc lower slide rail are provided with the second postive stop baffle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610185185.7A CN105604206A (en) | 2016-03-29 | 2016-03-29 | Slippage seismic isolation pendulum |
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| CN201610185185.7A CN105604206A (en) | 2016-03-29 | 2016-03-29 | Slippage seismic isolation pendulum |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786282A (en) * | 2017-03-22 | 2017-05-31 | 中国电力科学研究院 | A kind of electrical equipment slides gold utensil |
| CN108457514A (en) * | 2018-02-13 | 2018-08-28 | 北京建筑大学 | A kind of slide device for isolation structure |
| CN109138205A (en) * | 2018-09-10 | 2019-01-04 | 北京建筑大学 | Variation rigidity tension slide device |
| CN109577728A (en) * | 2018-12-11 | 2019-04-05 | 北京建筑大学 | Struggle against the wooden earthquake isolating equipment of arch formula |
| CN109853769A (en) * | 2019-03-11 | 2019-06-07 | 广州大学 | Rail mounted becomes friction-pendulum shock-insulation support |
| CN109881784A (en) * | 2019-01-22 | 2019-06-14 | 上海大学 | A kind of cambered surface slide type three-dimensional shock isolation support |
| CN110241930A (en) * | 2019-07-15 | 2019-09-17 | 无锡安特斯密减隔震科技有限公司 | A kind of friction pendulum support |
| CN112523364A (en) * | 2020-10-28 | 2021-03-19 | 清华大学 | Anti-pulling double-layer double-pendulum type friction pendulum vibration isolation support |
| CN113090705A (en) * | 2021-03-05 | 2021-07-09 | 中国电力科学研究院有限公司 | Nonlinear horizontal shock isolation device |
| CN114809313A (en) * | 2022-05-18 | 2022-07-29 | 丰泽智能装备股份有限公司 | Anti-drawing guide rail type friction pendulum support |
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| CN103147393A (en) * | 2013-03-09 | 2013-06-12 | 北京工业大学 | Pulling-resistant friction isolation bearing for bridge |
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| KR20100089258A (en) * | 2009-02-03 | 2010-08-12 | 구로사와 겐세츠 가부시키가이샤 | Isolation building structure |
| CN103147393A (en) * | 2013-03-09 | 2013-06-12 | 北京工业大学 | Pulling-resistant friction isolation bearing for bridge |
| CN205475808U (en) * | 2016-03-29 | 2016-08-17 | 徐志刚 | Shock insulation that slides pendulum |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786282A (en) * | 2017-03-22 | 2017-05-31 | 中国电力科学研究院 | A kind of electrical equipment slides gold utensil |
| CN108457514A (en) * | 2018-02-13 | 2018-08-28 | 北京建筑大学 | A kind of slide device for isolation structure |
| CN109138205A (en) * | 2018-09-10 | 2019-01-04 | 北京建筑大学 | Variation rigidity tension slide device |
| CN109138205B (en) * | 2018-09-10 | 2020-04-28 | 北京建筑大学 | Variable-rigidity tensile sliding device |
| CN109577728A (en) * | 2018-12-11 | 2019-04-05 | 北京建筑大学 | Struggle against the wooden earthquake isolating equipment of arch formula |
| CN109881784A (en) * | 2019-01-22 | 2019-06-14 | 上海大学 | A kind of cambered surface slide type three-dimensional shock isolation support |
| CN109853769B (en) * | 2019-03-11 | 2024-02-13 | 广州大学 | Rail type friction-variable pendulum vibration isolation support |
| CN109853769A (en) * | 2019-03-11 | 2019-06-07 | 广州大学 | Rail mounted becomes friction-pendulum shock-insulation support |
| CN110241930A (en) * | 2019-07-15 | 2019-09-17 | 无锡安特斯密减隔震科技有限公司 | A kind of friction pendulum support |
| CN112523364A (en) * | 2020-10-28 | 2021-03-19 | 清华大学 | Anti-pulling double-layer double-pendulum type friction pendulum vibration isolation support |
| CN113090705A (en) * | 2021-03-05 | 2021-07-09 | 中国电力科学研究院有限公司 | Nonlinear horizontal shock isolation device |
| CN114809313A (en) * | 2022-05-18 | 2022-07-29 | 丰泽智能装备股份有限公司 | Anti-drawing guide rail type friction pendulum support |
| CN114809313B (en) * | 2022-05-18 | 2022-11-18 | 丰泽智能装备股份有限公司 | Anti-drawing guide rail type friction pendulum support |
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