FR2544432A1 - PARASISMIC CYLINDER FOR ELASTICALLY SUPPORTED STRUCTURE - Google Patents
PARASISMIC CYLINDER FOR ELASTICALLY SUPPORTED STRUCTURE Download PDFInfo
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- FR2544432A1 FR2544432A1 FR8218817A FR8218817A FR2544432A1 FR 2544432 A1 FR2544432 A1 FR 2544432A1 FR 8218817 A FR8218817 A FR 8218817A FR 8218817 A FR8218817 A FR 8218817A FR 2544432 A1 FR2544432 A1 FR 2544432A1
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- cylinder
- piston
- earthquake
- rod
- support
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/20—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with the piston-rod extending through both ends of the cylinder, e.g. constant-volume dampers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/34—Foundations for sinking or earthquake territories
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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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- 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
- E04H9/0235—Anti-seismic devices with hydraulic or pneumatic damping
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Description
La présente invention concerne un vérin hydraulique qui permet de reporter sur des appuis rigides les efforts instantanés appliqués à une structure élastiquement supportée, tout en la laissant libre de se dilater. The present invention relates to a hydraulic cylinder which allows the instantaneous forces applied to an elastically supported structure to be transferred to rigid supports, while leaving it free to expand.
Cette invention est tout particulièrement destinée aux ouvrages d'art, tels que les viaducs, dont les tabliers sont soumis à des efforts horizontaux qui peuvent être lents ou brutaux et instantanés selon qu'ils sont dus à la dilatation; à des efforts sismiques, des efforts de freinage, des chocs, ou autres. En effet, lorsqu'un viaduc par exemple repose sur des piles élancées, il est important de limiter la valeur des efforts horizontaux transmis à ces piles et, par suite, on cherche à reporter sur des culees massives extrêmes les forces instantanées qui peuvent résulter du freinage des convois, d'une excitation sismique éventuelle, ou de tout autre effort horisontal brutal ou instantané, tout en permettant un libre déplacement du tablier par rapport aux culées sous l'effet des phénomènes lents tels que la dilatation. This invention is particularly intended for engineering structures, such as viaducts, whose decks are subjected to horizontal forces which can be slow or brutal and instantaneous depending on whether they are due to expansion; to seismic forces, braking forces, shocks, or the like. Indeed, when a viaduct for example rests on slender piers, it is important to limit the value of the horizontal forces transmitted to these piers and, consequently, one seeks to transfer to instantaneous massive culees the instantaneous forces which can result from the braking of convoys, possible seismic excitation, or any other brutal or instantaneous horizontal effort, while allowing free movement of the deck relative to the abutments under the effect of slow phenomena such as expansion.
La solution généralement adoptée actuellement consiste à monter, entre chacune des extrémités du tablier d'un viaduc et la culée massive correspondante, au moins un vérin dit "parasismique" bien que son rôle ne soit nullement limité à la protection contre les effets sismiques mais qu'il soit destiné à absorber les efforts horizontaux transmis, d'origines diverses. Dans ce vérin classique, le cylindre et le piston sont portés respectivement par le viaduc et par la culée et délimitent entre eux une chambre de fluide à volume variable. La chambre à volume variable est reliée à un réservoir de fluide par l'intermédiaire d'un orifice calibré, de sorte que le fluide passe du réservoir au vérin et inversement, sous l'effet des déplacements du tablier et les variations de volume de la chambre engendrées par le déplacement du piston et limitées par la présence de l'orifice calibré. The solution generally adopted at present consists in mounting, between each of the ends of the apron of a viaduct and the corresponding massive abutment, at least one so-called "earthquake-resistant" actuator, although its role is in no way limited to protection against seismic effects but 'it is intended to absorb the horizontal forces transmitted, of various origins. In this conventional jack, the cylinder and the piston are carried respectively by the viaduct and by the abutment and delimit between them a fluid chamber with variable volume. The variable volume chamber is connected to a fluid reservoir via a calibrated orifice, so that the fluid passes from the reservoir to the cylinder and vice versa, under the effect of the movements of the bulkhead and the variations in volume of the chamber generated by the displacement of the piston and limited by the presence of the calibrated orifice.
Un tel dispositif suppose toutefois que le réservoir est maintenu légèrement sous pression de façon à éviter tout risque de désamorçage provoquant une entrée d'air dans le vérin. En conséquence on place le réservoir en surélévation par rapport au vérin et on applique une pression à la surface supérieure du liquide, généralement de l'huile. Malheureusement ceci nécessite la mise en place d'un réseau de tuyauterie occupant avec le réservoir un espace relativement important et des logements spéciaux, et entraînant des risques de fuite en cas de détérioration de ces tuyauteries. Such a device assumes, however, that the reservoir is kept slightly under pressure so as to avoid any risk of defusing causing air to enter the cylinder. Consequently, the tank is placed in elevation relative to the jack and a pressure is applied to the upper surface of the liquid, generally oil. Unfortunately this requires the installation of a piping network occupying with the tank a relatively large space and special housings, and entailing risks of leakage in the event of deterioration of these piping.
La présente invention a pour but de remédier à ces inconvénients en réalisant un vérin hydraulique parasis- mique, dans lequel les risques de fuite et de désamorçage soient inexistants et l'installation simple. The object of the present invention is to remedy these drawbacks by producing a parasitic hydraulic cylinder, in which the risks of leakage and defusing are nonexistent and the installation simple.
Cette invention a en effet pour objet un vérin parasismique pour structure elastiquement appuyée, dont le piston divise le cylindre en deux chambres contenant ensemble un volume constant de fluide et communiquant entre elles, d'une part par un très faible jeu périphérique entre le piston et le cylindre et, d'autre part, par un perçage traversant le piston et fermé par un clapet antiretour qui s'ouvre dans le sens de l'extension du vérin. The object of this invention is in fact an earthquake-resistant cylinder for an elastically supported structure, the piston of which divides the cylinder into two chambers together containing a constant volume of fluid and communicating with each other, on the one hand by a very small peripheral clearance between the piston the cylinder and, on the other hand, by a hole passing through the piston and closed by a non-return valve which opens in the direction of the extension of the jack.
Dans un tel vérin, la totalité du fluide hydraulique est constamment contenue dans le cylindre, de sorte qu'aucune tuyauterie n'est nécessaire et qu'aucune fuite du liquide n'est à craindre. Un faible débit de fluide peut cependant s'écouler entre le piston et le cylindre. In such a cylinder, all of the hydraulic fluid is constantly contained in the cylinder, so that no piping is necessary and that no leakage of the liquid is to be feared. However, a small flow of fluid can flow between the piston and the cylinder.
I1 permet le déplacement du piston sous l'effet des efforts dus à des phénomènes lents mais est insuffisant dans le cas d'efforts brutaux, de sorte que ceux-ci sont transmis à la culée. I1 allows the displacement of the piston under the effect of forces due to slow phenomena but is insufficient in the case of sudden forces, so that these are transmitted to the abutment.
De préférence, la tige du piston traverse le cylindre de part en part et est creuse. Preferably, the piston rod passes right through the cylinder and is hollow.
En outre la tige de piston est reliée par des surfaces de portée sphériques à la structure, tandis que le cylindre est fixé sur une base d'appui munie d'une plaque de néoprène fretté intercalée entre elle et le support, ce qui permet d'absorber les déplacements transversaux
La description ci-dessous d'un mode de réalisation donné à titre d'exemple non limitatif, et représenté aux dessins annexés, fera d'ailleurs ressortir les avantages et caractéristiques de l'invention.In addition, the piston rod is connected by spherical bearing surfaces to the structure, while the cylinder is fixed to a support base provided with a hoop of neoprene interposed between it and the support, which makes it possible to absorb transverse displacements
The description below of an embodiment given by way of nonlimiting example, and represented in the appended drawings, will moreover highlight the advantages and characteristics of the invention.
Sur ces dessins
- la fig. 1 est une vue en coupe longitudinale d'un vérin parasismique selon l'invention;
- la fig. 2 est une vue en bout d'un tablier de viaduc muni de plusieurs vérins parasismiques;
- la fig. 3 est une vue partielle, en coupe longitudinale, de l'extrémité du tablier en appui sur la culée.On these drawings
- fig. 1 is a view in longitudinal section of an earthquake-resistant cylinder according to the invention;
- fig. 2 is an end view of a viaduct deck provided with several seismic cylinders;
- fig. 3 is a partial view, in longitudinal section, of the end of the deck bearing on the abutment.
Comme le montre la figure I, le vérin comporte un cylindre creux 1, comportant un fond 2 et fermé à son extrémité opposee par une paroi 3 fixée de manière étanche par l'intermédiaire d'un joint d'étanchéité 4. Le fond 2 et la paroi opposée 3 sont traversés, de manière étanche grce à des joints toriques ou analogues 18, 19, par la tige creuse 6 d'un piston 8 susceptible de coulisser dans le cylindre 1.Dans le mode de réalisation représenté, le piston 8 est constitué par une couronne maintenue entre un épaulement extérieur 10 de la tige 6 et une bague de serrage 12 fixée sur cette tige
Le diamètre extérieur du piston 8 est légèrement plus petit que le diamètre interne du cylindre a, de sorS qu'il subsiste toujours entre ces deux organes un jeu annulaire 14 et que le piston divise le cylindre en deux chambres 16, 17 constamment en communication par ce jeu périphérique 14. Les deux chambres 16, 17 contiennent un fluide visqueux, tel que de l'huile, qui remplit la tota lité du volume interne du cylindre et est enfermé de manière étanche dans ce dernier, mais peut passer d'une chambre à l'autre lors des déplacements de la tige 6 et du piston 8.Par suite, quelle que soit la position de la tige 6 et du piston 8 par rapport au cylindre 1, le meme volume de fluide est contenu à l'intérieur de ce cylindre 1 et aucune sortie ni entrée de fluide n'est utile en fonctionnement normal.As shown in FIG. I, the jack comprises a hollow cylinder 1, comprising a bottom 2 and closed at its opposite end by a wall 3 fixed in leaktight manner by means of a seal 4. The bottom 2 and the opposite wall 3 are crossed, in leaktight manner by O-rings or the like 18, 19, by the hollow rod 6 of a piston 8 capable of sliding in the cylinder 1. In the embodiment shown, the piston 8 is constituted by a crown held between an external shoulder 10 of the rod 6 and a clamping ring 12 fixed on this rod
The external diameter of the piston 8 is slightly smaller than the internal diameter of the cylinder a, so that there is always an annular clearance between these two members 14 and that the piston divides the cylinder into two chambers 16, 17 constantly in communication by this peripheral clearance 14. The two chambers 16, 17 contain a viscous fluid, such as oil, which fills the entire internal volume of the cylinder and is sealed in the latter, but can pass from one chamber to the other during the displacements of the rod 6 and of the piston 8. Consequently, whatever the position of the rod 6 and of the piston 8 relative to the cylinder 1, the same volume of fluid is contained inside this cylinder 1 and no outlet or inlet of fluid is useful in normal operation.
Le piston 8 comporte en outre un perçage 20 qui le traverse et relie les chambres 16 et 17. Ce perçage 20 est fermé par un clapet à bille 22 qui joue le role de clapet anti-retour et ne laisse passer l'huile que dans une direction
La paroi 3 de fermeture du cylindre 1 est prolongée par une jupe cylindrique 24 solidaire d'une base d'appui 26 recouverte extérieurement par une plaque 27 en un matériau élastique, tel qu'un néoprène fretté, permettant une rotation et un glissement relatifs de la base 26 et du support sur lequel elle est fixée. A l'extrémité opposée du vérin, la tige 6 comporte une surface convexe sensiblement sphérique 30,qui est appuyée contre u grain de forme correspondante, 32, d'une semelle d'appui 34
La tige 6 est par ailleurs solidaire d'une vis 40 qui la maintient axialement par rapport à la semelle 34, mais est logée dans un évidement 42 de cette semelle, de sorte que les surfaces 30 et 32 peuvent glisser l'une par rapport à l'autre et que des déplacements de la semelle 34, dans ie sens transversal du vérin, ne sont pas transmis à la tige 6. Seuls les efforts longitudinaux déplacent la tige 6 par rapport au cylindre 1.The piston 8 also has a hole 20 which passes through it and connects the chambers 16 and 17. This hole 20 is closed by a ball valve 22 which acts as a non-return valve and lets the oil pass only in a direction
The wall 3 for closing the cylinder 1 is extended by a cylindrical skirt 24 secured to a support base 26 externally covered by a plate 27 made of an elastic material, such as a hooped neoprene, allowing relative rotation and sliding of the base 26 and the support on which it is fixed. At the opposite end of the jack, the rod 6 has a substantially spherical convex surface 30, which is pressed against a grain of corresponding shape, 32, of a support sole 34
The rod 6 is also secured to a screw 40 which holds it axially relative to the sole 34, but is housed in a recess 42 in this sole, so that the surfaces 30 and 32 can slide one relative to the other. the other and that movements of the sole 34, in the transverse direction of the jack, are not transmitted to the rod 6. Only the longitudinal forces move the rod 6 relative to the cylinder 1.
En utilisation la base d'appui 26, ou plus exactement la plaque de néoprène fretté 27, est montée sur un support fixe, par exemple sur la culée de pont 28 repré- sentée sur la figure 3, tandis que la semelle d'appui 34 est fixée sur la structure dont les efforts longitudinaux doivent etre absorbés. Dans le mode de réalisation de la figure 3, la semelle 34 est fixée sur la face extrême d'un tablier 36 de pont ou viaduc reposant par des patins 38 sur une surface horizontale 39 de la culée 28. In use, the support base 26, or more precisely the hooped neoprene plate 27, is mounted on a fixed support, for example on the bridge abutment 28 shown in FIG. 3, while the support sole 34 is fixed on the structure whose longitudinal forces must be absorbed. In the embodiment of FIG. 3, the sole 34 is fixed to the end face of an apron 36 of a bridge or viaduct resting by pads 38 on a horizontal surface 39 of the abutment 28.
Lorsque des efforts longitudinaux, tels que des efforts de dilatation, des efforts de freinage, des chocs ou des sollicitations sismiques, tendent à rapprocher le tablier 36 de la culée 28, la tige 6 est poussée vers la droite en regardant la figure 1, et le piston 8 tend à se rapprocher de la paroi 3 en refoulant le fluide de la chambre 17, voisine de cette paroi, en direction de la chambre 16 ferme par le fond 2 Toutefois, seul le faible jeu 14 permet l'écoulement du fluide. Le clapet 22 interdit tout écoulement de liquide par le perçage 20. When longitudinal forces, such as expansion forces, braking forces, shocks or seismic stresses, tend to bring the deck 36 closer to the abutment 28, the rod 6 is pushed to the right when looking at FIG. 1, and the piston 8 tends to approach the wall 3 by driving the fluid from the chamber 17, adjacent to this wall, in the direction of the chamber 16 closed by the bottom 2 However, only the small clearance 14 allows the fluid to flow. The valve 22 prohibits any flow of liquid through the bore 20.
Par suite, sil s'agit d'un phénomène lent, le fluide s'écoule librement par le jeu 14 sans engendrer une difference de pression importante de part et d'autre du piston 8. I1 y aura alors libre déplacement des diffe- rents organes sans apparition d'efforts. Par contre, dans le cas d'efforts instantanés ou brutaux, le jeu 14 est trop étroit pour permettre un écoulement correspondant du liquide et celui-ci s'oppose au déplacement du piston La variation du volume d'huile qui équilibre les efforts de butée est pratiquement nulle et le vérin se comporte comme un appui fixe bloqué vis-à-vis des efforts instantanés de compression. Consequently, if it is a slow phenomenon, the fluid flows freely through the clearance 14 without generating a significant difference in pressure on either side of the piston 8. There will then be free movement of the different organs without the appearance of effort. On the other hand, in the case of instantaneous or sudden forces, the clearance 14 is too narrow to allow a corresponding flow of the liquid and the latter is opposed to the displacement of the piston The variation in the oil volume which balances the abutment forces is practically zero and the jack behaves like a fixed support blocked vis-à-vis instantaneous compression forces.
A l'inverse, lorsque l'effort exercé sur le tablier 36 tend à l'écarter de la culée 28, le piston 8 est dé- placé en direction de la chambre 16 et le clapet 22 est repoussé par la pression du liquide. Le passage du fluide d'une chambre à l'autre s'effectue donc à la fois par le jeu périphérique 14 et par le perçage 20. L'huile s'écoule pratiquement librement et le vérin n'oppose aucune résis tance à un tel effort de traction, qu'il soit de longue ou de courte durée, lent ou brutal. Conversely, when the force exerted on the bulkhead 36 tends to move it away from the abutment 28, the piston 8 is moved in the direction of the chamber 16 and the valve 22 is pushed back by the pressure of the liquid. The passage of the fluid from one chamber to the other is therefore carried out both by the peripheral clearance 14 and by the bore 20. The oil flows practically freely and the jack does not oppose any resistance to such a tractive effort, whether long or short, slow or brutal.
De préférence, le cylindre 1 est muni d'un dispositif de sécurité constitué par un limiteur de pression 44 relié au volume interne de ce cylindre et assurant l'évacuation de l'huile par un conduit 45 jusqu'à l'extérieur lorsque, pour une raison quelconque, la pression dans le cylindre s'élève au-dessus d'une valeur critique. Preferably, the cylinder 1 is provided with a safety device constituted by a pressure limiter 44 connected to the internal volume of this cylinder and ensuring the evacuation of the oil by a conduit 45 to the outside when, for for some reason, the pressure in the cylinder rises above a critical value.
Le cylindre 1 peut également comporter un orifice de remplissage 46, normalement fermé. L'ensemble est en outre protégé par un soufflet 48 fixé, s'une part sur la semelle 34 et, d'autre part, sur la base d'appui 26 et enfermant ainsi la totalité du vérin. The cylinder 1 may also include a filling opening 46, normally closed. The assembly is further protected by a fixed bellows 48, on the one hand on the sole 34 and, on the other hand, on the support base 26 and thus enclosing the entire jack.
De préférence, lors de la réalisation d'un pont, d'un viaduc, ou d'un ouvrage d'art de ce type, un ou plusieurs vérins parasismiques sont montés à chacune des ex- trémités du tablier, entre ces extrémités et les culées de support. Par exemple, comme le montre la figure 2, quatre vérins 52 sont montés à l'extrémité du tablier 36 d'un viaduc, quatre vérins identiques étant montés à l'autre extrémité. Chacun de ces vérins constitue un système autonome et compact dont tous les éléments sont enfermés à l'intérieur du soufflet de protection, mais tous les efforts horizontaux instantanés sont transmis par les vé rins de l'une ou de l'autre des extrémités à la culée correspondante. Preferably, during the construction of a bridge, a viaduct, or a work of art of this type, one or more earthquake-resistant cylinders are mounted at each of the ends of the deck, between these ends and the support abutments. For example, as shown in Figure 2, four cylinders 52 are mounted at the end of the deck 36 of a viaduct, four identical cylinders being mounted at the other end. Each of these jacks constitutes an autonomous and compact system, all the elements of which are enclosed inside the protective bellows, but all the instantaneous horizontal forces are transmitted by the jacks from one or the other of the ends to the corresponding abutment.
Quels que soient l'importance et la fréquence des efforts, les vérins fonctionnent toujours de manière sure et fiable grâce à l'action d'un fluide dont le volume total reste constant, meme si la durée d'utilisation est longue. En outre, la tige 6 étant guidée à ses deux extrémités et ne supportant aucun effort transversal lorsque la structure tourne ou se déplace verticalement, conserve un alignement parfait quelle que soit sa position longi tudinale, clest-à-dire la position du piston dans le cy gindre
Par ailleurs,-le vérin est d'une construction simple, donc économique, et sa mise en place ne nécessite pas d'opération particulière sur la structure ni sur son support. Ce vérin, qui est tout particulièrement adapté à la construction des ponts et autres ouvrages d'art, peut bien entendu avantageusement être utilisé pour tout autre type de structure isostatique ou hyperstatique, en béton armé ou précontraint, en métal ou tout autre maté- riau, tels que des poutres de roulement, quais et ouvrages maritimes, des massifs d'ancrage, des structures de bâtiments industriels, ou autres, chaque fois qu'une structure élastiquement appuyée sur au moins deux appuis est soumise à des efforts longitudinaux. Whatever the importance and the frequency of the efforts, the jacks always operate in a safe and reliable manner thanks to the action of a fluid whose total volume remains constant, even if the duration of use is long. In addition, the rod 6 being guided at its two ends and not supporting any transverse force when the structure rotates or moves vertically, retains perfect alignment whatever its longitudinal position, that is to say the position of the piston in the swan
Furthermore, the jack is of a simple construction, therefore economical, and its installation does not require any particular operation on the structure nor on its support. This cylinder, which is particularly suitable for the construction of bridges and other engineering structures, can of course advantageously be used for any other type of isostatic or hyperstatic structure, in reinforced or prestressed concrete, in metal or any other material. , such as girders, quays and maritime structures, anchor blocks, structures of industrial buildings, or other, whenever a structure elastically supported on at least two supports is subjected to longitudinal forces.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8218817A FR2544432B1 (en) | 1982-11-09 | 1982-11-09 | PARASISMIC CYLINDER FOR ELASTICALLY SUPPORTED STRUCTURE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8218817A FR2544432B1 (en) | 1982-11-09 | 1982-11-09 | PARASISMIC CYLINDER FOR ELASTICALLY SUPPORTED STRUCTURE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2544432A1 true FR2544432A1 (en) | 1984-10-19 |
| FR2544432B1 FR2544432B1 (en) | 1985-11-29 |
Family
ID=9279046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8218817A Expired FR2544432B1 (en) | 1982-11-09 | 1982-11-09 | PARASISMIC CYLINDER FOR ELASTICALLY SUPPORTED STRUCTURE |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2544432B1 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992013158A3 (en) * | 1991-01-07 | 1992-09-17 | Silar Srl | A constraint device for parts of viaducts and the like |
| FR2683558A1 (en) * | 1991-11-07 | 1993-05-14 | Public Works Research Inst | Variable shock-absorption system for a bridge |
| EP0694652A1 (en) * | 1994-07-29 | 1996-01-31 | Freyssinet International (Stup) | Device for transmitting forces in civil engineering constructions |
| FR2743384A1 (en) * | 1996-01-09 | 1997-07-11 | Freyssinet Int Stup | CONNECTION DEVICE FOR ELEMENTS OF A CIVIL ENGINEERING STRUCTURE |
| FR2743383A1 (en) * | 1996-01-09 | 1997-07-11 | Freyssinet Int Stup | DAMPING DEVICE FOR ELEMENTS OF A CIVIL ENGINEERING STRUCTURE |
| FR2750440A1 (en) * | 1996-06-26 | 1998-01-02 | Jarret | Fixing of bridge roadway to support pile |
| EP0823517A1 (en) * | 1996-08-06 | 1998-02-11 | A.L.G.A. Applicazione Lavorazione Giunti Appoggi S.p.A. | An antiseismic energy dissipator for structures such as viaducts and the like |
| US5920938A (en) * | 1997-08-05 | 1999-07-13 | Elcock; Stanley E. | Method for rejuvenating bridge hinges |
| WO2012091864A3 (en) * | 2010-12-28 | 2012-08-23 | Ge-Hitachi Nuclear Energy Americas Llc | Seismic and impact mitigation devices and systems |
| WO2014088484A1 (en) * | 2012-12-03 | 2014-06-12 | Aktiebolaget Skf | Hydraulic unit and a submerged unit comprising such an hydraulic unit |
| CN106436950A (en) * | 2016-10-17 | 2017-02-22 | 安徽信泽科技有限公司 | Pull-rod spiral spring damper with presettable early-stage rigidity |
| CN108591355A (en) * | 2018-06-27 | 2018-09-28 | 佛山科学技术学院 | A kind of vertical vibration isolation bearing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2055000A (en) * | 1935-08-12 | 1936-09-22 | Bacigalupo Joseph | Building construction |
| CH251565A (en) * | 1944-10-13 | 1947-10-31 | Olaer Marine Soc | Apparatus comprising a hydraulic circuit and a device intended to create a resistance in this circuit. |
| DE923592C (en) * | 1953-01-29 | 1955-02-17 | Rene Fernand Marie Nicoulaud | Hydraulic shock absorbers, especially for motor vehicles |
| FR1580122A (en) * | 1967-10-02 | 1969-09-05 |
-
1982
- 1982-11-09 FR FR8218817A patent/FR2544432B1/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2055000A (en) * | 1935-08-12 | 1936-09-22 | Bacigalupo Joseph | Building construction |
| CH251565A (en) * | 1944-10-13 | 1947-10-31 | Olaer Marine Soc | Apparatus comprising a hydraulic circuit and a device intended to create a resistance in this circuit. |
| DE923592C (en) * | 1953-01-29 | 1955-02-17 | Rene Fernand Marie Nicoulaud | Hydraulic shock absorbers, especially for motor vehicles |
| FR1580122A (en) * | 1967-10-02 | 1969-09-05 |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992013158A3 (en) * | 1991-01-07 | 1992-09-17 | Silar Srl | A constraint device for parts of viaducts and the like |
| FR2683558A1 (en) * | 1991-11-07 | 1993-05-14 | Public Works Research Inst | Variable shock-absorption system for a bridge |
| EP0694652A1 (en) * | 1994-07-29 | 1996-01-31 | Freyssinet International (Stup) | Device for transmitting forces in civil engineering constructions |
| FR2723111A1 (en) * | 1994-07-29 | 1996-02-02 | Freyssinet Int Stup | IMPROVEMENTS ON STRUCTURE TRANSMISSION DEVICES FOR CIVIL ENGINEERING WORKS |
| US6142270A (en) * | 1996-01-09 | 2000-11-07 | Freyssinet International (Stup) | Tie device for transmitting force between two structural elements |
| FR2743384A1 (en) * | 1996-01-09 | 1997-07-11 | Freyssinet Int Stup | CONNECTION DEVICE FOR ELEMENTS OF A CIVIL ENGINEERING STRUCTURE |
| FR2743383A1 (en) * | 1996-01-09 | 1997-07-11 | Freyssinet Int Stup | DAMPING DEVICE FOR ELEMENTS OF A CIVIL ENGINEERING STRUCTURE |
| WO1997025498A1 (en) * | 1996-01-09 | 1997-07-17 | Freyssinet International (Stup) | Connecting device for elements in a civil engineering construction |
| WO1997025497A1 (en) * | 1996-01-09 | 1997-07-17 | Freyssinet International (Stup) | Damping device for elements of a civil engineering construction |
| FR2750440A1 (en) * | 1996-06-26 | 1998-01-02 | Jarret | Fixing of bridge roadway to support pile |
| US5918850A (en) * | 1996-06-26 | 1999-07-06 | Jarret | Device for positioning at least one fixed point in a civil engineering structure and use in such structures |
| US5918339A (en) * | 1996-08-06 | 1999-07-06 | A. L. G. A. Applicazione Lavorazione Giunti Appoggi S.P.A. | Antiseismic energy dissipator for structures such as viaducts and the like |
| EP0823517A1 (en) * | 1996-08-06 | 1998-02-11 | A.L.G.A. Applicazione Lavorazione Giunti Appoggi S.p.A. | An antiseismic energy dissipator for structures such as viaducts and the like |
| US5920938A (en) * | 1997-08-05 | 1999-07-13 | Elcock; Stanley E. | Method for rejuvenating bridge hinges |
| WO2012091864A3 (en) * | 2010-12-28 | 2012-08-23 | Ge-Hitachi Nuclear Energy Americas Llc | Seismic and impact mitigation devices and systems |
| US8424253B2 (en) | 2010-12-28 | 2013-04-23 | Ge-Hitachi Nuclear Energy Americas Llc | Seismic and impact mitigation devices and systems |
| WO2014088484A1 (en) * | 2012-12-03 | 2014-06-12 | Aktiebolaget Skf | Hydraulic unit and a submerged unit comprising such an hydraulic unit |
| CN106436950A (en) * | 2016-10-17 | 2017-02-22 | 安徽信泽科技有限公司 | Pull-rod spiral spring damper with presettable early-stage rigidity |
| CN108591355A (en) * | 2018-06-27 | 2018-09-28 | 佛山科学技术学院 | A kind of vertical vibration isolation bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2544432B1 (en) | 1985-11-29 |
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