EP0260163B1 - Anchorage for stressed reinforcements - Google Patents
Anchorage for stressed reinforcements Download PDFInfo
- Publication number
- EP0260163B1 EP0260163B1 EP87401741A EP87401741A EP0260163B1 EP 0260163 B1 EP0260163 B1 EP 0260163B1 EP 87401741 A EP87401741 A EP 87401741A EP 87401741 A EP87401741 A EP 87401741A EP 0260163 B1 EP0260163 B1 EP 0260163B1
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- EP
- European Patent Office
- Prior art keywords
- jaw
- tapered end
- anchoring device
- lateral surface
- cable
- 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.)
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
- E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
Definitions
- the invention relates to devices for anchoring tensile reinforcements and more particularly to these devices, which comprise a longitudinally split annular jaw having a rough inner cylindrical surface, in particular ridged, and an outer lateral surface of frustoconical appearance, jaw which surrounds one end of the frame to be anchored and which cooperates with a complementary recess recessed in a rigid anchoring part, this housing being dimensioned in such a way that it contiguously surrounds the whole of the tapered end of the jaw.
- the reinforcements considered by the word cables will be designated, for the purpose of simplification and without any limitation being implied, the reinforcements in question generally being constituted by cables or strands composed of several twisted wires, but which can also be formed differently. , for example by bars.
- the jaw is practically undeformable and the variations in elongation of the cable result in relative displacements between the rough interior face of the thinnest end of the jaw. and the section of cable surrounded by this end.
- This wear has the effect of tearing off said section of very small metal particles (generally iron) which oxidize rapidly and swell thereby: then migrating into the grain boundaries of the metallic structure constituting the cable section , these magnified oxide particles exert a wedge effect capable of bursting this structure and therefore of creating cracks in the cable, or even of breaking the latter.
- very small metal particles generally iron
- the object of the invention is, above all, to remedy this drawback.
- the tapered jaws split according to the invention are chosen from those for which the half-angle at the top of the outer lateral surface, of frustoconical shape, of the tapered end is less than 10 ° (see for example the document US-A 3,163,904) and they are characterized in that the radial thickness E of the annular end portion of said tapered end is less than or equal to 1 / 10th of the internal radius R of this end.
- the invention includes, apart from these. main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
- Figures 1 and 2 of this drawing show respectively in axial section and in cross section along II-II, Figure 1, a cable anchoring device established according to the invention.
- the cable 1 is here composed of twisted steel wires 2 and the anchoring device comprises a split jaw 3 of frustoconical shape suitable for jointing this cable and introduced into a complementary housing 4 it - even hollowed out in a rigid anchoring plate 5.
- the split jaw is composed of three identical keys 6 forming by their lateral juxtaposition a ring whose inner surface is cylindrical of revolution and whose outer surface has a frustoconical shape of revolution.
- the inner cylindrical face of the jaw is roughened by the formation of threads or ridges 7 or by bonding of abrasive grains.
- the tapered end of the jaw is relatively thick, namely of the order of 2 mm or more as in known embodiments, this end is not deformable.
- the tapered end of the jaw is given very thinness while intimately joining this end with the cable.
- the sliding can occur without damage, the faces in contact then being both smooth and no disadvantage resulting from their relative displacements.
- the great thinness of the tapered end of the jaw is defined as follows.
- the thickness E of the terminal annular section of this end is at most equal to 1 / 10th of the internal radius R of this section.
- the thickness E is between 0.5 and 0.8 mm.
- the half-angle at the apex A of the lateral surface of revolution of frustoconical shape which externally delimits the tapered end of the jaw is less than 10 ° .
- This half-angle A is preferably of the order of 5.5 ° .
- said end does not protrude axially from the anchor plate 5: its end edge is on the contrary inside this plate.
- the keys 6 are not only very thin, but also relatively long: their length L is generally greater than 30 times the thickness E of the terminal section of their tapered end as defined above.
- the jaw was composed of three identical keys for which the dimensions E, R and L above were respectively 0.7 mm, 8 mm and 45 mm.
- the outside diameter of the largest base of the jaw was 27 mm and the ridges 7 had a pitch of 0.5 mm and a depth of 0.3 mm.
- the invention is in no way limited to those of its modes of application and embodiments which have been more especially envisaged; it embraces in particular the variants where the number of slots provided in each jaw, a number determining that of the keys making up the jaw, would be different from three and for example equal to one, two or four.
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- Architecture (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Ropes Or Cables (AREA)
- Prostheses (AREA)
- Piles And Underground Anchors (AREA)
- Cable Accessories (AREA)
- Clamps And Clips (AREA)
- Bridges Or Land Bridges (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Joining Of Building Structures In Genera (AREA)
- Vehicle Body Suspensions (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
L'invention concerne les dispositifs d'ancrage des armatures tendues et plus particulièrement ceux, de ces dispositifs, qui comprennent un mors annulaire fendu longitudinalement présentant une surface cylindrique intérieure rugueuse, notamment striée, et une surface latérale extérieure d'allure tronconique, mors qui entoure une extrémité de l'armature à ancrer et qui coopère avec un logement complémentaire évidé dans une pièce rigide d'ancrage, ce logement étant dimensionné de façon telle qu'il entoure jointivement la totalité de l'extrémité effilée du mors.The invention relates to devices for anchoring tensile reinforcements and more particularly to these devices, which comprise a longitudinally split annular jaw having a rough inner cylindrical surface, in particular ridged, and an outer lateral surface of frustoconical appearance, jaw which surrounds one end of the frame to be anchored and which cooperates with a complementary recess recessed in a rigid anchoring part, this housing being dimensioned in such a way that it contiguously surrounds the whole of the tapered end of the jaw.
Elle concerne plus particulièrement le cas où l'armature à ancrer est sujette à des variations chroniques de tension et donc d'allongement, comme c'est le cas pour les haubans qui supportent les tabliers des ponts suspendus.It relates more particularly to the case where the reinforcement to be anchored is subject to chronic variations in tension and therefore in elongation, as is the case for the stays which support the decks of the suspension bridges.
Dans ce qui suit, on désignera les armatures considérées par le mot câbles, dans un but de simplification et à titre nullement limitatif, les armatures en question étant généralement constituées par des câbles ou torons composés de plusieurs fils torsadés, mais pouvant également être constituées différemment, par exemple par des barres.In what follows, the reinforcements considered by the word cables will be designated, for the purpose of simplification and without any limitation being implied, the reinforcements in question generally being constituted by cables or strands composed of several twisted wires, but which can also be formed differently. , for example by bars.
Dans les modes de réalisation actuels des dispositifs d'ancrage du genre ci-dessus, le mors est pratiquement indéformable et les variations d'allongement du câble se traduisent par des déplacements relatifs entre la face rugueuse intérieure de l'extrémité la plus mince du mors et le tronçon de câble entouré par cette extrémité.In the current embodiments of anchoring devices of the above kind, the jaw is practically undeformable and the variations in elongation of the cable result in relative displacements between the rough interior face of the thinnest end of the jaw. and the section of cable surrounded by this end.
Ces déplacements relatifs sont des sources d'usure dudit tronçon.These relative displacements are sources of wear of said section.
Cette usure a pour effet d'arracher dudit tronçon de très petites particules de métal (en général du fer) qui s'oxydent rapidement et gonflent de ce fait: en migrant ensuite dans les joints de grain de la structure métallique constitutive du tronçon de câble, ces particules d'oxyde grossies exercent un effet de coin capable de faire éclater cette structure et donc de créer des fissures dans le câble, voire même de rompre celui-ci.This wear has the effect of tearing off said section of very small metal particles (generally iron) which oxidize rapidly and swell thereby: then migrating into the grain boundaries of the metallic structure constituting the cable section , these magnified oxide particles exert a wedge effect capable of bursting this structure and therefore of creating cracks in the cable, or even of breaking the latter.
L'invention a pour but, surtout, de remédier à cet inconvénient.The object of the invention is, above all, to remedy this drawback.
A cet effet les mors tronconiques fendus selon l'invention sont choisis parmi ceux pour lesquels le demi-angle au sommet de la surface latérale extérieure, d'allure tronconique, de l'extrémité effilée est inférieur à 10° (voir par exemple le document US-A 3 163 904) et ils sont caractérisés en ce que l'épaisseur radiale E de la tranche terminale annulaire de ladite extrémité effilée est inférieure ou égale au 1/10ème du rayon intérieur R de cette extrémité.To this end, the tapered jaws split according to the invention are chosen from those for which the half-angle at the top of the outer lateral surface, of frustoconical shape, of the tapered end is less than 10 ° (see for example the document US-A 3,163,904) and they are characterized in that the radial thickness E of the annular end portion of said tapered end is less than or equal to 1 / 10th of the internal radius R of this end.
Dans des modes de réalisation avantageux, on a recours en outre à l'une et/ou à l'autre des dispositions suivantes:
- - le demi-angle au sommet de la surface latérale extérieure, d'allure tronconique, de l'extrémité effilée du mors est de l'ordre de 5 à 6°,
- - le demi-angle au sommet selon l'alinéa précédent décroît et tend vers zéro en direction de la tranche terminale de l'extrémité effilée,
- - la longueur du mors est supérieure à 30 fois l'épaisseur radiale E ci-dessus,
- - la portion de la face interne, du logement recevant le mors, qui entoure l'extrémité effilée de ce mors et est appliquée jointivement contre cette extrémité, est polie,
- - un lubrifiant est interposé entre l'extrémité effilée du mors et la face en regard du logement avec laquelle cette extrémité coopère.
- - the half-angle at the top of the outer lateral surface, of frustoconical shape, of the tapered end of the jaw is of the order of 5 to 6 ° ,
- - the half-angle at the top according to the preceding paragraph decreases and tends towards zero in the direction of the terminal edge of the tapered end,
- - the length of the jaw is greater than 30 times the radial thickness E above,
- the portion of the internal face of the housing receiving the jaw, which surrounds the tapered end of this jaw and is applied contiguously against this end, is polished,
- - A lubricant is interposed between the tapered end of the jaw and the opposite face of the housing with which this end cooperates.
L'invention comprend, mises à part ces . dispositions principales, certaines autres dispositions qui s'utilisent de préférence en même temps et dont il sera plus explicitement question ci-après.The invention includes, apart from these. main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
Dans ce qui suit, l'on va décrire un mode de réalisation préféré de l'invention en se référant au dessin ci-annexé d'une manière bien entendu non limitative.In what follows, a preferred embodiment of the invention will be described with reference to the attached drawing, of course in a non-limiting manner.
Les figures 1 et 2, de ce dessin, montrent respectivement en coupe axiale et en coupe transversale selon II-II, figure 1, un dispositif d'ancrage de câble établi selon l'invention.Figures 1 and 2 of this drawing show respectively in axial section and in cross section along II-II, Figure 1, a cable anchoring device established according to the invention.
D'une façon connue en soi, le câble 1 est ici composé de fils d'acier 2 torsadés et le dispositif d'ancrage comprend un mors fendu 3 d'allure tronconique propre à entourer jointivement ce câble et introduit dans un logement complémentaire 4 lui-même évidé dans une plaque rigide d'ancrage 5.In a manner known per se, the cable 1 is here composed of twisted steel wires 2 and the anchoring device comprises a
Le mors fendu est composé de trois clavettes identiques 6 formant par leur juxtaposition latérale une bague dont la surface intérieure est cylindrique de révolution et dont la surface extérieure présente une allure tronconique de révolution.The split jaw is composed of three
La face cylindrique intérieure du mors est rendue rugueuse par formation de filets ou stries 7 ou par collage de grains abrasifs.The inner cylindrical face of the jaw is roughened by the formation of threads or ridges 7 or by bonding of abrasive grains.
Si l'extrémité effilée du mors est relativement épaisse, savoir de l'ordre de 2 mm ou davantage comme dans les réalisations connues, cette extrémité n'est pas déformable.If the tapered end of the jaw is relatively thick, namely of the order of 2 mm or more as in known embodiments, this end is not deformable.
Si alors le câble est soumis à des tensions variables, c'est-à-dire à des déformations longitudinales alternatives, comme c'est le cas par exemple pour les haubans supportant les tabliers des ponts suspendus, l'expérience montre qu'il y a risque de fissure ou même de rupture du câble au niveau de l'extrémité effilée du mors.If then the cable is subjected to variable tensions, that is to say to alternative longitudinal deformations, as is the case for example for the stays supporting the decks of the suspension bridges, experience shows that there there is a risk of cracking or even breaking of the cable at the tapered end of the jaw.
En effet, si l'amplitude des déformations longitudinales du câble est nulle au niveau de la grande base du mors, où l'ancrage dans la pièce rigide 5 est totalement assuré, elle est au contraire maximum au niveau de la petite base du mors, vu qu'au-delà de cette petite base la liberté de déformation du câble n'est aucunement entravée.Indeed, if the amplitude of the longitudinal deformations of the cable is zero at the level of the large base of the jaw, where the anchoring in the rigid part 5 is completely ensured, it is on the contrary maximum at the level of the small base of the jaw, since beyond this small base the freedom of cable deformation is not hindered in any way.
Lorsque les clavettes ne sont pas déformables même à leurs extrémités effilées, on observe obligatoirement audit niveau de la petite base du mors des glissements avec frottement entre le câble et les clavettes, susceptibles d'arracher du câble des molécules de métal, lesquelles s'oxydent, gonflent et risquent de faire éclater la structure métallique environnante par pénétration dans les joints de grain de la structure métallique du câble selon un effet comparable à celui des coins de bois gonflés par de l'eau.When the keys are not deformable even at their tapered ends, it is compulsory to observe at said level of the small base of the jaw slippage with friction between the cable and the keys, capable of tearing metal molecules from the cable, which oxidize , swell and risk bursting the surrounding metal structure by penetrating into the grain joints of the metal structure of the cable to an effect comparable to that of wooden corners swollen with water.
Pour remédier à cet inconvénient, selon l'invention, on donne à l'extrémité effilée du mors une très grande minceur tout en solidarisant intimement cette extrémité avec le câble.To overcome this drawback, according to the invention, the tapered end of the jaw is given very thinness while intimately joining this end with the cable.
Il résulte de cette double caractéristique que d'une part l'extrémité effilée considérée est déformable longitudinalement et que, d'autre part, elle est effectivement déformée longitudinalement lorsque le câble l'est.It follows from this double characteristic that on the one hand the tapered end considered is deformable longitudinally and that, on the other hand, it is effectively deformed longitudinally when the cable is.
Les glissements générateurs de frottement et d'usure qui étaient observés précédemment entre le câble 1 et les clavettes 6 ne se produisent donc plus et sont remplacés par des glissements entre les clavettes 6 et leur logement 4.The slips generating friction and wear which were observed previously between the cable 1 and the
Or à l'interface logement-clavette, désignée par la référence 9 sur la figure 1, les glissements peuvent intervenir sans dommage, les faces en contact étant alors toutes les deux lisses et aucun inconvénient ne résultant de leurs déplacements relatifs.However, at the housing-keyway interface, designated by the reference 9 in FIG. 1, the sliding can occur without damage, the faces in contact then being both smooth and no disadvantage resulting from their relative displacements.
Pour réduire au maximum les risques de frottement à cette interface g, il peut être avantageux :
- - de polir la face interne du logement 4, ou tout au moins de sa portion qui entoure l'extrémité effilée du mors,
- - et même d'interposer un lubrifiant entre ladite face ou extrémité et le mors qui coagit avec elle.
- to polish the internal face of the housing 4, or at least of its portion which surrounds the tapered end of the jaw,
- - And even to interpose a lubricant between said face or end and the jaw which interacts with it.
La grande minceur de l'extrémité effilée du mors est définie comme suit.The great thinness of the tapered end of the jaw is defined as follows.
D'une part l'épaisseur E de la tranche terminale anulaire de cette extrémité est au plus égale au 1/10ème du rayon intérieur R de cette tranche.On the one hand, the thickness E of the terminal annular section of this end is at most equal to 1 / 10th of the internal radius R of this section.
A titre d'exemple, si le rayon R est de l'ordre de 8 mm, l'épaisseur E est comprise entre 0,5 et 0,8 mm.For example, if the radius R is of the order of 8 mm, the thickness E is between 0.5 and 0.8 mm.
D'autre part le demi-angle au sommet A de la surface latérale de révolution d'allure tronconique qui délimite extérieurement l'extrémité effilée du mors est inférieur à 10°.On the other hand, the half-angle at the apex A of the lateral surface of revolution of frustoconical shape which externally delimits the tapered end of the jaw is less than 10 ° .
Ce demi-angle A est de préférence de l'ordre de 5,5°.This half-angle A is preferably of the order of 5.5 ° .
Quant à l'application radiale intime de chaque extrémité effilée de clavette contre le câble, elle est assurée par un emprisonnement serré de cette extrémité entre le logement 4 du mors et ledit câble 1.As for the intimate radial application of each tapered end of the key against the cable, it is ensured by a tight confinement of this end between the housing 4 of the jaw and said cable 1.
En d'autres termes, ladite extrémité ne fait pas saillie axialement hors de la plaque d'ancrage 5 : sa tranche terminale se trouve au contraire à l'intérieur de cette plaque.In other words, said end does not protrude axially from the anchor plate 5: its end edge is on the contrary inside this plate.
Pour accroître encore ce double effet de minceur et de serrage radial de l'extrémité effilée du mors contre le câble, on peut envisager des variantes selon lesquelles le demi-angle au sommet A de la surface latérale extérieure de cette extrémité effilée deviendrait quasiment nul, cette surface n'ayant plus alors une forme rigoureusement tronconique mais une forme de révolution se rapprochant d'un cylindre et dont la génératrice s'étendrait selon un arc d'hyperbole admettant une asymptote parallèle à l'axe du mors.To further increase this double effect of thinness and radial tightening of the tapered end of the jaw against the cable, it is possible to envisage variants according to which the half-angle at the apex A of the external lateral surface of this tapered end becomes almost zero, this surface then no longer having a strictly frustoconical shape but a shape of revolution approaching a cylinder and whose generatrix would extend according to a hyperbola arc admitting an asymptote parallel to the axis of the jaw.
Dans les modes de réalisation préférés, les clavettes 6 sont non seulement très minces, mais aussi relativement longues : leur longueur L est en général supérieure à 30 fois l'épaisseur E de la tranche terminale de leur extrémité effilée telle que définie ci-dessus.In the preferred embodiments, the
A titre d'exemple purement illustratif, on indique que, dans une réalisation ayant donné toute satisfaction, le mors était composé de trois clavettes identiques pour lesquelles les dimensions E, R et L ci-dessus étaient respectivement de 0,7 mm, 8 mm et 45 mm.As a purely illustrative example, it is indicated that, in an embodiment which has given all satisfaction, the jaw was composed of three identical keys for which the dimensions E, R and L above were respectively 0.7 mm, 8 mm and 45 mm.
Le diamètre extérieur de la plus grande base du mors était de 27 mm et les stries 7 avaient un pas de 0,5 mm et une profondeur de 0,3 mm.The outside diameter of the largest base of the jaw was 27 mm and the ridges 7 had a pitch of 0.5 mm and a depth of 0.3 mm.
En suite de quoi, et quel que soit le mode de réalisation adopté, on obtient finalement des dispositifs d'ancrage de câbles dont la constitution résulte suffisamment de ce qui précède.As a result of this, and whatever the embodiment adopted, cable anchoring devices are finally obtained whose constitution results sufficiently from the above.
Ces dispositifs présentent sur ceux antérieurement connus l'important avantage d'accroître considérablement la durée de vie ou résistance à la "fatigue" des câbles ancrés par eux lorsque ceux-ci sont soumis à des effets dynamiques, c'est-à-dire variables, du fait que le mouvement relatif entre chaque câble et la pièce d'ancrage correspondante est transféré de l'interface rugueuse câble-extrémités effilées des clavettes à l'interface lisse extrémités effilées des clavettes-logement de ces extrémités, transfert rendu possible par la très grande minceur donnée auxdites extrémités effilées, combinée au serrage intime de ces dernières contre le câble et à l'état rugueux de la face interne desdites extrémités, lesquelles sont donc solidarisées intimement avec la portion de câble qu'elles entourent.These devices have over those previously known the significant advantage of considerably increasing the service life or resistance to "fatigue" of the cables anchored by them when they are subjected to dynamic, that is to say variable, effects. , because the relative movement between each cable and the corresponding anchoring part is transferred from the rough cable-tapered ends of the keys interface to the smooth interface tapered ends of the keys-housing of these ends, transfer made possible by the very great thinness given to said tapered ends, combined with the intimate tightening of the latter against the cable and in the rough state of the internal face of said ends, which are therefore intimately secured to the portion of cable which they surround.
Comme il va de soi, et comme il résulte d'ailleurs déjà de ce qui précède, l'invention ne se limite nullement à ceux de ses modes d'application et de réalisation qui ont été plus spécialement envisagés ; elle embrasse notamment les variantes où le nombre des fentes prévues dans chaque mors, nombre déterminant celui des clavettes constitutives du mors, serait différent de trois et par exemple égal à un, deux ou quatre.As is obvious, and as already follows from the foregoing, the invention is in no way limited to those of its modes of application and embodiments which have been more especially envisaged; it embraces in particular the variants where the number of slots provided in each jaw, a number determining that of the keys making up the jaw, would be different from three and for example equal to one, two or four.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87401741T ATE46555T1 (en) | 1986-07-31 | 1987-07-24 | ANCHORING DEVICE FOR STRESSING REINFORCEMENTS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8611140 | 1986-07-31 | ||
| FR8611140A FR2602258B1 (en) | 1986-07-31 | 1986-07-31 | IMPROVEMENTS ON ANCHORING DEVICES FOR TENSIONED STRUCTURES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0260163A1 EP0260163A1 (en) | 1988-03-16 |
| EP0260163B1 true EP0260163B1 (en) | 1989-09-20 |
Family
ID=9337935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87401741A Expired EP0260163B1 (en) | 1986-07-31 | 1987-07-24 | Anchorage for stressed reinforcements |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4941303A (en) |
| EP (1) | EP0260163B1 (en) |
| JP (1) | JPS6343046A (en) |
| CN (1) | CN1008826B (en) |
| AT (1) | ATE46555T1 (en) |
| DE (1) | DE3760589D1 (en) |
| ES (1) | ES2010712B3 (en) |
| FR (1) | FR2602258B1 (en) |
| GR (1) | GR3000161T3 (en) |
| TR (1) | TR23353A (en) |
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| FR2708017B1 (en) * | 1993-07-21 | 1995-09-22 | Freyssinet Int Stup | Improvements to the frusto-conical jaws for anchoring cables and their implementation processes. |
| US5713169A (en) * | 1994-04-25 | 1998-02-03 | Eidgenossische Materialprufungsund Forschungsanstalt EMPA | Anchorage device for high-performance fiber composite cables |
| US7118299B2 (en) * | 2001-01-23 | 2006-10-10 | Erico International Corporation | Reinforcing bar connection and method |
| JP4822853B2 (en) * | 2006-01-18 | 2011-11-24 | タマホーム 株式会社 | Rebar locker |
| US7765752B2 (en) * | 2008-02-20 | 2010-08-03 | Hayes Specialty Machining, Ltd. | Anchor system with substantially longitudinally equal wedge compression |
| EP2516754B1 (en) * | 2009-12-23 | 2018-08-29 | Geotech Pty Ltd | An anchorage system |
| CN104019186A (en) * | 2014-06-11 | 2014-09-03 | 无锡通用钢绳有限公司 | Steel wire rope clamping device |
| CN105133490B (en) * | 2015-09-10 | 2016-11-30 | 来安县新元机电设备设计有限公司 | Bridge detecting device and detection method thereof |
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| FR1237901A (en) * | 1959-06-25 | 1960-08-05 | Stup Procedes Freyssinet | Improvements to anchoring devices for prestressing reinforcement |
| GB880224A (en) * | 1959-07-27 | 1961-10-18 | P S C Equipment Ltd | Improvements in or relating to anchorage devices |
| GB895519A (en) * | 1959-09-10 | 1962-05-02 | P S C Equipment Ltd | Improvements in or relating to externally-tapered split sleeves |
| US3163904A (en) * | 1963-06-24 | 1965-01-05 | Supreme Products Corp | Strand chucks |
| BE759109A (en) * | 1969-12-31 | 1971-04-30 | Joslyn Mfg And Supply Cy | END FITTINGS FOR FIBERGLASS RODS MUST WITHSTAND HIGH TENSILE LOADS |
| US3673644A (en) * | 1970-07-10 | 1972-07-04 | Howlett Machine Works | Tendon anchorage |
| US3703748A (en) * | 1970-08-14 | 1972-11-28 | Kelly Systems Inc | Anchor for post-tensioning prestressed concrete |
| US4144686A (en) * | 1971-07-22 | 1979-03-20 | William Gold | Metallic beams reinforced by higher strength metals |
| JPS545990Y2 (en) * | 1972-05-02 | 1979-03-17 | ||
| GB1478309A (en) * | 1973-08-23 | 1977-06-29 | Ccl Systems Ltd | Anchorage assembly for use in the prestressing of concrete structures |
| DE2550137C3 (en) * | 1975-11-07 | 1979-01-18 | Gallus Prof. Dr.-Ing. 8000 Muenchen Rehm | Wedge anchoring for high-strength tension members |
| FR2516573A1 (en) * | 1981-11-17 | 1983-05-20 | Freyssinet Int Stup | Cotter pin anchorage for prestressed reinforcement cable - has truncated pins wedging into truncated cavity in anchor block |
| FR2524030A1 (en) * | 1982-03-25 | 1983-09-30 | Precontrainte Ste Fse | Anchor head for progressively contracted composite tie rod - has truncated anchoring pin wedged into anchoring ring orifice |
| DE3224702C2 (en) * | 1982-07-02 | 1986-01-16 | Dyckerhoff & Widmann AG, 8000 München | Device for anchoring and coupling a bundle tendon for prestressed concrete |
-
1986
- 1986-07-31 FR FR8611140A patent/FR2602258B1/en not_active Expired
-
1987
- 1987-07-24 DE DE8787401741T patent/DE3760589D1/en not_active Expired
- 1987-07-24 AT AT87401741T patent/ATE46555T1/en not_active IP Right Cessation
- 1987-07-24 EP EP87401741A patent/EP0260163B1/en not_active Expired
- 1987-07-24 ES ES87401741T patent/ES2010712B3/en not_active Expired
- 1987-07-29 TR TR544/87A patent/TR23353A/en unknown
- 1987-07-31 JP JP62192543A patent/JPS6343046A/en active Pending
- 1987-07-31 CN CN87105250A patent/CN1008826B/en not_active Expired
-
1988
- 1988-11-08 US US07/270,432 patent/US4941303A/en not_active Expired - Lifetime
-
1989
- 1989-09-21 GR GR89400067T patent/GR3000161T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2602258A1 (en) | 1988-02-05 |
| CN1008826B (en) | 1990-07-18 |
| TR23353A (en) | 1989-12-19 |
| GR3000161T3 (en) | 1990-12-31 |
| ATE46555T1 (en) | 1989-10-15 |
| FR2602258B1 (en) | 1988-11-04 |
| ES2010712B3 (en) | 1989-12-01 |
| EP0260163A1 (en) | 1988-03-16 |
| US4941303A (en) | 1990-07-17 |
| JPS6343046A (en) | 1988-02-24 |
| DE3760589D1 (en) | 1989-10-26 |
| CN87105250A (en) | 1988-02-10 |
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