EP0428304B1 - Anchorage for stressed reinforcing tendon and method of making the same - Google Patents
Anchorage for stressed reinforcing tendon and method of making the same Download PDFInfo
- Publication number
- EP0428304B1 EP0428304B1 EP19900312047 EP90312047A EP0428304B1 EP 0428304 B1 EP0428304 B1 EP 0428304B1 EP 19900312047 EP19900312047 EP 19900312047 EP 90312047 A EP90312047 A EP 90312047A EP 0428304 B1 EP0428304 B1 EP 0428304B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bore
- filling material
- anchorage
- stressed
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
-
- 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
- This invention relates to anchorages for stressed reinforcing tendons for structures, for example, concrete or metal structures having internal or external stressed tendons and other engineering structures having stays constituted by stressed reinforcing tendons.
- the invention also relates to a reinforced structure including a reinforcing tendon and at least one anchorage therefore.
- a reinforcing tendon in a reinforced structure comprises one or more tensioned elements usually of steel and nowadays usually in the form of strand, i.e. a multifilament steel wire.
- the element or elements are anchored after stressing at each end in an anchorage.
- At at least one end there is a "live" anchorage at which a jack has been applied to tension the element or elements and at which the tensioned elements are anchored by means of an anchoring device, for example a split conical wedge lodged in a conical seat in an anchoring body, e.g. a plate.
- the anchoring plate bears on the reinforced structure directly or indirectly. Adjacent the anchoring plate, the element or elements may be located within a rigid tube or trumpet, and throughout their length in the reinforced structure, or when extending through the air in the case of an external tendon, they are usually encased in a sheath.
- GB-A-2,148,351 describes further processes of filling, including passing the epoxy upwardly through a tube passing through the anchoring plate into the trumpet, where the epoxy fills the space around the stressed elements. It is mentioned that the liquid epoxy may run back through the bores housing the elements and the conical wedges. To prevent escape of epoxy in this manner a rubber sheet is fixed to the outside of the anchoring plate.
- US-A-4,619,088 describes injection of epoxy through the bores housing the conical wedges which grip the stressed elements, in order that the grouting material, e.g. epoxy, shall enter a tube closely surrounding the stressed element, in order to anchor the element to the tube.
- This tube acts as a secondary member for transferring stress from the stressed element to the anchoring plate.
- This tube may extend through the plate as far as the outer end of the anchoring plate, in which case the anchoring wedge is located in the tube.
- the tube has its end close to the narrow end of the conical wedge in the bore in the anchoring plate.
- DE-A-3437107 shows an anchorage having split conical wedge in bores in the anchoring plate, which bores have non-tapering portions extending away from the wedges. From the anchoring plate there extends a sleeve which is wholly filled with the filling material which also occupies the bores in the plate.
- the present invention seeks to provide improved load transfer from the stressed element to the anchoring body, in the case where the stressed element is anchored in the anchoring body by means of a split conical wedge, and using a hardenable fluid material such as epoxy resin.
- an anchorage for a stressed reinforcing tendon as set out in claim 1.
- the filling material at most projects only slightly from the bore, at least at the inner end of the bore.
- the stressed element in the bore is directly bonded to the anchoring body by the filling material in the bore, which provides good load transfer between the stressed element and the anchoring body.
- the filling material bridges the gap between the strand and the wall of the bore.
- the gaps in the split conical wedge in the bore are entirely filled with the filling material.
- the wedge is toothed at its surface which grips the stressed element, and the filling material fills the gaps between the teeth and the stressed element, thereby improving the engagement between the stressed element and the wedge.
- the bore has a length of at least 8 centimetres, more preferably at least 10 centimetres. Preferably at least 50% of the length of the bore is not occupied by the conical wedge.
- the invention is particularly applicable to the case where the element is a strand.
- the invention also provides a method of making an anchorage as described above, as set out in claim 7.
- the hardenable filling material is injected into the bore from outside the bore at the outside face of the anchoring body and has a viscosity such that it does not flow freely and substantially entirely fills the bore when injected substantially without flowing out of the other end of the bore, or at least not to more than a small extent.
- a thixotropic hardenable material is used.
- the hardenable material at the time of injection preferably has a "non-sag" thickness (determined according to ASTM D2730) in the range 10 mm to 40 mm at 15°C.
- the invention is particularly applicable to an anchoring body having a plurality of bores each housing a stressed element and a conical wedge therefore.
- the hardenable material is injected into each bore individually.
- Fig. 1 shows part of an anchoring plate 1 having a plurality of bores 2, of which only one is shown in the drawing, each bore housing a stressed steel strand 3 which is anchored in a frusto-conical portion 4 of the bore by a split conical wedge 5 of conventional type.
- the wedge 5 is in three parts, being split along axial planes. It has teeth (not shown) at its inner surfaces which engage the strand 3.
- Anchoring plates of this general kind, and the split conical wedges are well-known in this art.
- the application of the present anchorage in a stressed reinforcing tendon in a concrete structure will be apparent to one skilled in the art without further description.
- the bore 2 of the plate has a length of about 10 cm, of which about 4 cm are occupied by the wedge 5.
- the stressed portion of the strand 3 extends there is a widening at a shoulder 7 at the region not occupied by the wedge 5.
- the vacant spaces of the bore 2 are entirely filled with a hardened filling material 8, such as an epoxy resin.
- a hardened filling material 8 such as an epoxy resin.
- This is injected in liquid state prior to hardening by applying a covering head 9 to the outside face 10 of the anchoring body 1 with a seal 11 to the face 10 around the opening of the bore 2 and an O-ring 12 sealing to the projecting end of the strand 3.
- a hollow space 13 at the mouth of the bore 2 into which hardenable filling material is injected via a passage 14 in the cover 9.
- Two suitable hardenable materials are mentioned below.
- the hardenable material is injected via the passage 14 and has a viscosity such that it flows under the injection pressure but does not flow freely. It therefore fills the space 13 and the whole of the bore 2, including the spaces between the split portions of the wedge 5 and between the teeth of the wedge 5 and the gripped surface of the strand 3, and also fills all the space around the strand 3 at the the portion of the bore not occupied by the wedge 5, finally to emerge at the inner end of the bore to form a small head 15 around the strand.
- this head 15 is as small as possible.
- it projects not more than 2 cm from the end of the core 5.
- the filling material After removal of the cover 9 and the seals 11,12, the filling material is allowed to self-harden (cure) or is hardened for example by heat. There is thus produced the anchored strand 3 shown in Fig. 2 embedded in a rigid body of hardened filling material 8 which completely fills the bore 2 and provides load transfer between the strand 3 and the anchoring body 1, thus relieving the wedge 5 of a part of the load.
- the material 8 also fills the gaps between the teeth of the wedge 5 and the gripped surface of the strand 3, improving the engagement between the strand and the wedge. As can be seen, only small portions of the material 8 project from the ends of the bore 2.
- step 7 The presence of the step 7 is to allow the strand 3 to have a deflection where it emerges from the wedge 5 as is often necessary where a plurality of strands are anchored in a single plate.
- the effect of the rigid body of filling material 8 is to dampen the force applied by the strand 3 to the wedge 5, so that the wedge absorbs the dead load while the live load (dynamic load) applied to the strand is mainly or entirely transferred directly to the anchoring plate by the filling material 8, so that little or no live load is applied to the wedge.
- the hardened material 8 in this way improves the fatigue performance of the anchorage. A stay having an anchorage of the present type has been subjected satisfactorily to tests of 2 million loading cycles. The tension of the strand 3 is taken wholly by the plate 1.
- Suitable hardenable materials for injection in the process of the invention are Concresive (Regd. Trade Name) 1411 and 1428 supplied by Ceilcote GmbH (Biebesheim, Germany). These have non-sag thicknesses at 15°C of 25 mm (1411) and 20 mm (1428).
- Fig. 3 shows the completed anchorage in section.
- the anchoring plate 1 bears upon a support ring 16 embedded in a concrete structure 17 which has a passage 18 bounded by a tube 19.
- the plate 1 is shown with three of the bores 2 each receiving a tensioned strand 3. In practice there are usually a larger number of such bores 2 and strands 3.
- the strands 3 extend through the passage 18 within a sheath 20, and converge towards each other.
- the strands 3 are anchored in the anchoring plate by the combination of the split conical wedges 5 and the hardened filler material 8.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Piles And Underground Anchors (AREA)
- Joining Of Building Structures In Genera (AREA)
Description
- This invention relates to anchorages for stressed reinforcing tendons for structures, for example, concrete or metal structures having internal or external stressed tendons and other engineering structures having stays constituted by stressed reinforcing tendons. The invention also relates to a reinforced structure including a reinforcing tendon and at least one anchorage therefore.
- A reinforcing tendon in a reinforced structure, e.g. a concrete structure, comprises one or more tensioned elements usually of steel and nowadays usually in the form of strand, i.e. a multifilament steel wire. The element or elements are anchored after stressing at each end in an anchorage. At at least one end, there is a "live" anchorage at which a jack has been applied to tension the element or elements and at which the tensioned elements are anchored by means of an anchoring device, for example a split conical wedge lodged in a conical seat in an anchoring body, e.g. a plate. The anchoring plate bears on the reinforced structure directly or indirectly. Adjacent the anchoring plate, the element or elements may be located within a rigid tube or trumpet, and throughout their length in the reinforced structure, or when extending through the air in the case of an external tendon, they are usually encased in a sheath.
- Recently there has developed a practice of filling the rigid tube or trumpet adjacent the anchoring body with epoxy resin, which hardens in situ to provide a rigid bond between the element or elements and the tube or trumpet. The epoxy when hardened transfers some of the load of the elements to the structure, thus relieving the anchoring wedges of some of the applied load. This relief is particularly valuable when the load is subject to cyclical variation, e.g. in a bridge. In GB-A-2,095,302, there is described a method in which a curable low viscosity epoxy material is introduced into the trumpet at the anchorage first, and aggregate particles are added later to act as filler. GB-A-2,148,351 describes further processes of filling, including passing the epoxy upwardly through a tube passing through the anchoring plate into the trumpet, where the epoxy fills the space around the stressed elements. It is mentioned that the liquid epoxy may run back through the bores housing the elements and the conical wedges. To prevent escape of epoxy in this manner a rubber sheet is fixed to the outside of the anchoring plate.
- US-A-4,619,088 describes injection of epoxy through the bores housing the conical wedges which grip the stressed elements, in order that the grouting material, e.g. epoxy, shall enter a tube closely surrounding the stressed element, in order to anchor the element to the tube. This tube acts as a secondary member for transferring stress from the stressed element to the anchoring plate. This tube may extend through the plate as far as the outer end of the anchoring plate, in which case the anchoring wedge is located in the tube. Alternatively, the tube has its end close to the narrow end of the conical wedge in the bore in the anchoring plate.
- DE-A-3437107 shows an anchorage having split conical wedge in bores in the anchoring plate, which bores have non-tapering portions extending away from the wedges. From the anchoring plate there extends a sleeve which is wholly filled with the filling material which also occupies the bores in the plate.
- The present invention seeks to provide improved load transfer from the stressed element to the anchoring body, in the case where the stressed element is anchored in the anchoring body by means of a split conical wedge, and using a hardenable fluid material such as epoxy resin.
- According to the invention there is provided an anchorage for a stressed reinforcing tendon as set out in claim 1.
- In this anchorage, the filling material at most projects only slightly from the bore, at least at the inner end of the bore.
- In the invention, the stressed element in the bore is directly bonded to the anchoring body by the filling material in the bore, which provides good load transfer between the stressed element and the anchoring body. Thus the filling material bridges the gap between the strand and the wall of the bore. Furthermore, the gaps in the split conical wedge in the bore are entirely filled with the filling material. Preferably the wedge is toothed at its surface which grips the stressed element, and the filling material fills the gaps between the teeth and the stressed element, thereby improving the engagement between the stressed element and the wedge.
- Preferably the bore has a length of at least 8 centimetres, more preferably at least 10 centimetres. Preferably at least 50% of the length of the bore is not occupied by the conical wedge.
- The invention is particularly applicable to the case where the element is a strand.
- The invention also provides a method of making an anchorage as described above, as set out in claim 7. In the method, typically the hardenable filling material is injected into the bore from outside the bore at the outside face of the anchoring body and has a viscosity such that it does not flow freely and substantially entirely fills the bore when injected substantially without flowing out of the other end of the bore, or at least not to more than a small extent. Suitably a thixotropic hardenable material is used. The hardenable material at the time of injection preferably has a "non-sag" thickness (determined according to ASTM D2730) in the
range 10 mm to 40 mm at 15°C. - The invention is particularly applicable to an anchoring body having a plurality of bores each housing a stressed element and a conical wedge therefore. In this case preferably the hardenable material is injected into each bore individually.
- An embodiment of the invention is illustrated by way of non-limitative example in the accompanying drawing, in which
- Fig. 1 is a sectional view of part of an anchorage of the invention during the injection operation,
- Fig. 2 is a sectional view corresponding to Fig. 1 showing the filled bore after injection and hardening of the filling material, and
- Fig. 3 is a sectional view of completed anchorage.
- Fig. 1 shows part of an anchoring plate 1 having a plurality of bores 2, of which only one is shown in the drawing, each bore housing a stressed steel strand 3 which is anchored in a frusto-
conical portion 4 of the bore by a split conical wedge 5 of conventional type. Typically the wedge 5 is in three parts, being split along axial planes. It has teeth (not shown) at its inner surfaces which engage the strand 3. Anchoring plates of this general kind, and the split conical wedges, are well-known in this art. Likewise, the application of the present anchorage in a stressed reinforcing tendon in a concrete structure will be apparent to one skilled in the art without further description. - As seen in Fig. 1, the bore 2 of the plate has a length of about 10 cm, of which about 4 cm are occupied by the wedge 5. In the cylindrical portion 6 of the bore, where the stressed portion of the strand 3 extends there is a widening at a shoulder 7 at the region not occupied by the wedge 5.
- The vacant spaces of the bore 2 are entirely filled with a hardened
filling material 8, such as an epoxy resin. This is injected in liquid state prior to hardening by applying a coveringhead 9 to theoutside face 10 of the anchoring body 1 with a seal 11 to theface 10 around the opening of the bore 2 and an O-ring 12 sealing to the projecting end of the strand 3. There is thus left ahollow space 13 at the mouth of the bore 2, into which hardenable filling material is injected via apassage 14 in thecover 9. Two suitable hardenable materials are mentioned below. - The hardenable material is injected via the
passage 14 and has a viscosity such that it flows under the injection pressure but does not flow freely. It therefore fills thespace 13 and the whole of the bore 2, including the spaces between the split portions of the wedge 5 and between the teeth of the wedge 5 and the gripped surface of the strand 3, and also fills all the space around the strand 3 at the the portion of the bore not occupied by the wedge 5, finally to emerge at the inner end of the bore to form asmall head 15 around the strand. Preferably thishead 15 is as small as possible. Suitably it projects not more than 2 cm from the end of the core 5. - After removal of the
cover 9 and theseals 11,12, the filling material is allowed to self-harden (cure) or is hardened for example by heat. There is thus produced the anchored strand 3 shown in Fig. 2 embedded in a rigid body of hardened fillingmaterial 8 which completely fills the bore 2 and provides load transfer between the strand 3 and the anchoring body 1, thus relieving the wedge 5 of a part of the load. Thematerial 8 also fills the gaps between the teeth of the wedge 5 and the gripped surface of the strand 3, improving the engagement between the strand and the wedge. As can be seen, only small portions of thematerial 8 project from the ends of the bore 2. - The presence of the step 7 is to allow the strand 3 to have a deflection where it emerges from the wedge 5 as is often necessary where a plurality of strands are anchored in a single plate.
- The effect of the rigid body of filling
material 8 is to dampen the force applied by the strand 3 to the wedge 5, so that the wedge absorbs the dead load while the live load (dynamic load) applied to the strand is mainly or entirely transferred directly to the anchoring plate by the fillingmaterial 8, so that little or no live load is applied to the wedge. The hardenedmaterial 8 in this way improves the fatigue performance of the anchorage. A stay having an anchorage of the present type has been subjected satisfactorily to tests of 2 million loading cycles. The tension of the strand 3 is taken wholly by the plate 1. - Suitable hardenable materials for injection in the process of the invention are Concresive (Regd. Trade Name) 1411 and 1428 supplied by Ceilcote GmbH (Biebesheim, Germany). These have non-sag thicknesses at 15°C of 25 mm (1411) and 20 mm (1428).
- Fig. 3 shows the completed anchorage in section. The anchoring plate 1 bears upon a
support ring 16 embedded in aconcrete structure 17 which has apassage 18 bounded by atube 19. The plate 1 is shown with three of the bores 2 each receiving a tensioned strand 3. In practice there are usually a larger number of such bores 2 and strands 3. The strands 3 extend through thepassage 18 within asheath 20, and converge towards each other. As shown in more detail in Figs. 1 and 2, the strands 3 are anchored in the anchoring plate by the combination of the split conical wedges 5 and thehardened filler material 8.
Claims (8)
- An anchorage for a stressed reinforcing tendon having an anchoring body (1) and at least one stressed element (3) of said tendon extending through a bore (2) in said anchoring body and anchored in said bore by a split conical wedge (5) in a frusto-conical first portion of said bore, said bore having a second portion extending away from the narrow end of said conical portion and being substantially entirely filled by hardened filling material (8) providing a direct bond between the stressed element (3) in the bore and the wall of the bore, characterised in that the extent of said filling material (8) is substantially confined to the bore whereby the wedge (5) transfers the dead load in said element to the anchoring body and the filling material (8) transfers the live load in said element to the anchoring body.
- An anchorage according to claim 1 wherein gaps in the split conical wedge (5) in the bore are entirely filled with the filling material.
- An anchorage according to claim 2 wherein said wedge (5) is toothed at its surface which grips the stressed element, and the filling material fills the gaps between the teeth and the stressed element.
- An anchorage according to any one of claims 1 to 3 wherein said bore (2) has a length of at least 8 centimetres.
- An anchorage according to any one of claims 1 to 4 wherein said split conical wedge (5) occupies less than half the length of said bore (2).
- An anchorage according to claim 1 wherein said stressed element (3) is a metal strand.
- A method of making an anchorage for a stressed reinforcing tendon according to claim 1 comprising the steps of(i) providing an anchoring body (1) having a bore (2) extending it through it, the bore having a frusto-conical first portion and a second portion extending away from the narrow end of the first portion,(ii) locating a portion of an elongate element (3) of said tendon in said bore, stressing said element and anchoring it in the bore by means of a split conical wedge (5) engaging said frusto-conical first portion thereof,(iii) injecting hardenable filling material (8) into said bore at one end thereof so as entirely to fill the bore, said hardenable filling material having a viscosity such that it does not flow freely, whereby it does not substantially flow out of the other end of said bore,(iv) effecting hardening of said hardenable filling material (8) in said bore, said hardenable filling material being selected so that after hardening it is capable of transferring load in said elongate element directly to said anchoring body.
- A method according to claim 7 wherein said hardenable filling material (8) when injected has a non-sag thickness (determined according to ASTM D 2730) in the range 10 to 40 mm at 15°C.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8924896 | 1989-11-03 | ||
GB898924896A GB8924896D0 (en) | 1989-11-03 | 1989-11-03 | Anchorage for stressed reinforcing tendon |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0428304A1 EP0428304A1 (en) | 1991-05-22 |
EP0428304B1 true EP0428304B1 (en) | 1994-04-06 |
Family
ID=10665709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900312047 Expired - Lifetime EP0428304B1 (en) | 1989-11-03 | 1990-11-02 | Anchorage for stressed reinforcing tendon and method of making the same |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0428304B1 (en) |
DE (1) | DE69007934T2 (en) |
ES (1) | ES2055343T3 (en) |
GB (1) | GB8924896D0 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3578219B2 (en) * | 1994-04-25 | 2004-10-20 | アイトゲネシッシェ マテリアルプリューフングス−ウント フォルシュングスアンシュタルト エーエムペーアー | High performance fiber composite wire fixing system |
NO321272B1 (en) * | 2000-05-31 | 2006-04-10 | Aker Kvaerner Subsea As | The tension member |
DE10062227A1 (en) * | 2000-12-13 | 2002-06-20 | Dyckerhoff & Widmann Ag | Method for installing and tensioning a freely tensioned tension member, in particular a stay cable for a stay cable bridge, and anchoring device for carrying out the method |
GB2514621B (en) * | 2013-05-31 | 2020-04-15 | Vsl Int Ag | Cable anchorage |
CN106320609B (en) * | 2016-08-17 | 2019-12-24 | 浙锚科技股份有限公司 | Steel strand inhaul cable and manufacturing method thereof |
ES2735145B2 (en) * | 2018-06-12 | 2020-06-29 | Fcc Construccion Sa | System and procedure of stripping of braces by incorporation of, or substitution for, improved filler material |
CN114457871B (en) * | 2022-03-08 | 2023-03-28 | 扬州大学 | Prestressing force structure suitable for piece base type pump station business turn over water flow path accuse splits |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1234969B (en) * | 1959-07-15 | 1967-02-23 | Cable Covers Ltd | Anchor sleeve for tendons in concrete bodies |
GB1149484A (en) * | 1966-04-20 | 1969-04-23 | Stressed Concrete Design Ltd | Improvements in or relating to prestressed structures |
DE2911226C2 (en) * | 1979-03-22 | 1985-12-05 | Andrä, Wolfhart, Dr.-Ing., 7000 Stuttgart | Method for producing a threaded tie rod anchorage |
GB8407596D0 (en) * | 1984-03-23 | 1984-05-02 | Manuf Aceros Caucho Sa | Reinforcing tendon |
DE3437107A1 (en) * | 1984-10-10 | 1986-04-10 | Dyckerhoff & Widmann AG, 8000 München | TIE LINK, ESPECIALLY SLOPED ROPE FOR A SLIDING ROPE BRIDGE |
DE8716677U1 (en) * | 1987-03-13 | 1988-02-11 | Dyckerhoff & Widmann AG, 8000 München | Corrosion-protected tension member, primarily tendon for unbonded prestressed concrete |
-
1989
- 1989-11-03 GB GB898924896A patent/GB8924896D0/en active Pending
-
1990
- 1990-11-02 DE DE1990607934 patent/DE69007934T2/en not_active Expired - Fee Related
- 1990-11-02 EP EP19900312047 patent/EP0428304B1/en not_active Expired - Lifetime
- 1990-11-02 ES ES90312047T patent/ES2055343T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB8924896D0 (en) | 1989-12-20 |
EP0428304A1 (en) | 1991-05-22 |
DE69007934D1 (en) | 1994-05-11 |
ES2055343T3 (en) | 1994-08-16 |
DE69007934T2 (en) | 1994-09-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5469677A (en) | Stressing anchorage for at least one tension element running inside an encasing tube and method of producing the stressing anchorage | |
US4773198A (en) | Post-tensioning anchorages for aggressive environments | |
CA1250758A (en) | Wedge anchoring system for the tensioning end of an individual prestressing element for a prestressed concrete component | |
CA1240533A (en) | Tension tie member | |
CA1064745A (en) | Corrosion protected tensioning member for a prestressable anchor in solid rock | |
US5720139A (en) | Method and apparatus for installing a multi-strand anchorage system | |
US4640068A (en) | Anchoring and coupling device for tendons in prestressed concrete | |
US20120011788A1 (en) | Method for Strengthening a Structure and Associated Anchorage Unit | |
JPH0240813B2 (en) | ||
EP0428304B1 (en) | Anchorage for stressed reinforcing tendon and method of making the same | |
US11473303B2 (en) | Multi-anchor concrete post-tensioning system | |
KR102079574B1 (en) | Composite multi-cap for finishing fixtures and method for constructing prestressed concrete structures using the same | |
JPH1018226A (en) | Concrete pier and concrete pier reinforcing method and tendon anchoring method | |
USRE34350E (en) | Tie formed of stressed high-tensile steel tendons | |
US20060265981A1 (en) | Wire bolt | |
US4407770A (en) | Cable anchorage | |
JP2003055911A (en) | Structure for saddle exit part of diagonal cable | |
JPS6098047A (en) | Not-contrained tensional tensile material comprising one or plural tensile material such as steel rod, steel wire or twisted steel wire | |
JPH08302904A (en) | Partial liquid tight structure of multi-stranded cable comprising pc steel-made stranded wire group | |
KR100378705B1 (en) | A fixing portion structure of pc steel and pouring method of buffing materials at the fixing portion of pc steel | |
JP7222824B2 (en) | Wall balustrade reinforcement method and reinforcement structure | |
EP3317471A1 (en) | Anchorage assembly for a structure, concrete structure with such an assembly, and manufacturing method of such a concrete structure | |
GB2148351A (en) | Cable anchorage | |
JP2020133260A (en) | Concrete slab joint structure and concrete slab joining method | |
EP3951066B1 (en) | A method of testing a structure, an assembly for testing a structure, and use of an assembly for testing a structure |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CENTRO DE TRABAJOS TECNICOS, S.A. |
|
17P | Request for examination filed |
Effective date: 19910817 |
|
17Q | First examination report despatched |
Effective date: 19920629 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB |
|
REF | Corresponds to: |
Ref document number: 69007934 Country of ref document: DE Date of ref document: 19940511 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2055343 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20031121 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20031125 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20031202 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20040129 Year of fee payment: 14 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20041102 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20041103 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050601 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20041102 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050729 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20041103 |