WO2001018306A2 - Tensioning mechanism, anchoring wedge for anchoring said tensioning mechanism and method for producing said anchoring wedge - Google Patents
Tensioning mechanism, anchoring wedge for anchoring said tensioning mechanism and method for producing said anchoring wedge Download PDFInfo
- Publication number
- WO2001018306A2 WO2001018306A2 PCT/AT2000/000232 AT0000232W WO0118306A2 WO 2001018306 A2 WO2001018306 A2 WO 2001018306A2 AT 0000232 W AT0000232 W AT 0000232W WO 0118306 A2 WO0118306 A2 WO 0118306A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- anchoring
- tendon
- tensioning
- wedge
- tensioning element
- Prior art date
Links
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
- E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/22—Flat or flat-sided ropes; Sets of ropes consisting of a series of parallel ropes
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/2087—Jackets or coverings being of the coated type
Definitions
- the invention relates to a tendon according to the preamble of claim 1 for use in structures in construction, in particular those in which bondless prestressing is required.
- Another object of the invention is the anchoring of the tensioning element according to the invention in an anchor body.
- FR 2 675 523 A and US 3 500 625 A have disclosed tensioning cables consisting of hexagonal shaped strands.
- tension cables which are enclosed by a plastic sheathing, there is a risk that the sheathing is damaged by the large number of peripheral edges of the strands, as a result of which cracks occur in the sheathing, which allow moisture to penetrate into the strands and cause corrosion damage to them.
- the square or rectangular shape of the wires enables the most compact conceivable shape of the tension member.
- Such tendons have the advantage that a larger cross section of the tendon is available for the same extent, whereby higher pretensioning forces can be achieved than in the known embodiments of the tendon cable. Due to the flat outer surfaces, the transverse pressures of the tendons are transmitted over surfaces, so that the transverse pressures on the plastic coverings become very small compared to those with strands that enter their transverse pressures over lines and lead to deformations of the plastic coverings. This also makes it possible to make the thickness of the plastic sleeve smaller, since the plastic sleeves are not deformed by the transverse stress from the transverse pressures. Finally, there is the advantage that with such tendons the anchoring wedges can be made smaller and the overall dimensions of the anchoring bodies can be reduced by approximately 20 to 30% compared to anchoring strands.
- tensioning element according to the invention is also a substantial saving in acquisition and production costs, since the stranding of the wires required in the stranded steel is eliminated in the steelworks, and also the most compact form of the Tension member is present because there are no cavities between the individual tension elements.
- the measure according to claim 2 is of particular advantage for the production of a tensioning strap.
- tensioning element be it in a band or bundle configuration, which is combined or enclosed by a common, outer protective cover, preferably made of plastic or the like, the entry of the transverse forces takes place over the full area of the tensioning elements and not as is the case with strands, over a line.
- the individual clamping elements are encased in fat and / or a plastic film.
- the measure according to claim 4 results in simple, time-saving and cost-saving anchoring of the tendon of the type according to the invention in an anchoring body. Through the measures according to claims 5 and 6, a simple and cost-saving manufacture of the anchoring wedge can be achieved.
- FIG. 4 shows a form similar to FIG. 3 in another variant
- FIG. 5 shows a further embodiment of a tendon with nine tendons arranged in a square
- FIG. 6 shows an embodiment of a tensioning element with four tensioning elements according to FIG. 5 arranged in a square configuration in cross section
- FIG. 7 shows a variant with sixteen tendons of the embodiment according to FIG. 1 in a square configuration in cross section
- 8 shows a cross section of an anchor body
- a single clamping element 1 with a rectangular cross section is provided, which is enclosed by a protective cover 2, which is preferably made of plastic.
- a very thin intermediate layer 3 made of fat or or and plastic film can be present between the tendon 1 and the protective cover 2, as is indicated by the broken line.
- two tensioning elements 1 of rectangular cross section are provided, which rest on one another with a flat side surface 4 and are enclosed by a common protective cover 2.
- a common protective cover 2 At least between the two tendons 1 there is a thin, indicated by dashed lines, intermediate layer 3 of fat or and and a thin plastic film.
- the individual tensioning elements 1 can also be enclosed by a layer of fat and / or plastic film.
- the embodiment of the tendon according to FIG. 3 differs from the embodiment according to FIG. 2 by a double number of tensioning elements.
- four tendons of the embodiment according to FIG. 1 also lie one on top of the other with a flat side surface 4 and may have a thin layer of fat and / or a thin plastic film as an intermediate layer.
- the individual tendons 1 can each be enclosed by a thin layer of fat or plastic film.
- the row of tendons is enclosed by a common plastic sheath 2 ', an intermediate layer 3 made of fat, a thin plastic film or the like, indicated by a broken line, can be provided between the tendons and the plastic sheath 2' or protective cover.
- clamping elements 1 there are four clamping elements 1 and in the embodiment of the clamping element according to FIG. 5 there are nine clamping elements 1 in a square configuration.
- FIG. 6 shows a tendon with four tendons according to FIG. 4 in a square configuration, the entirety of the tendons similar to the embodiment according to FIG Fig. 3, is surrounded by a common protective cover 2 'and may have an intermediate layer 3 made of fat or thin plastic film.
- the rectangular or square shape is to be understood in the broadest sense, i.e. it can also be provided with rounded corners.
- clamping elements 1 lying one above the other, e.g. According to the embodiment of the clamping elements according to FIGS. 4, 5, 6 and 7, it is necessary within the scope of the invention that no significant cavities or no cavities to be filled or cavities which reduce or reduce the clamping force or load-bearing capacity of the clamping element arise or available.
- the tendons 1 or the tensioning elements can be designed in any configuration. With each configuration of the tendons, a thin layer of grease and / or film, preferably made of plastic, can be present between the individual tendons or tensioning elements.
- the corners of the tensioning elements 1 can be rounded, beveled, folded or have a similar shape.
- the protective cover 2 or 2 'or the jacket can be made of any material and in any way, for example by extrusion, or consist of two shells 2A, 2B which, after inserting the tendons or the tensioning elements along the contact points by a weld 5 or 6 or bonding. Furthermore, there is also the possibility of producing the protective cover 2 or the sheath in such a way that a plastic tube is cut open and, after inserting the tendon or the tendons in the region of the joint, is welded to form a closed jacket. Finally, a fold connection can also be provided.
- the prestressed tensioning elements are anchored in an anchor body or anchor head 8 which, as shown in FIGS.
- holes 9 in the shape of a truncated cone or truncated pyramid. the size and shape of these holes is selected so that individual tendons or groups of the same can be anchored in the holes 9 by means of anchoring wedges or clamps 7 after prestressing.
- FIGS. 9 and 10 it was assumed in FIGS. 9 and 10 that a tendon according to FIG. 4 is prestressed and anchored in a hole 9 in the anchor head or anchor body 8.
- FIG. 9 it was assumed in FIGS. 9 and 10 that a tendon according to FIG. 4 is prestressed and anchored in a hole 9 in the anchor head or anchor body 8.
- anchoring wedges 7 with a cross-section in the form of a sector are provided, which are flat on their surface facing the tendon and provided with a toothing, while the outer surface of the anchoring wedges 7 are designed in the shape of a cone segment corresponding to the inner wall of the holes 9.
- the number and shape of the anchoring wedges as long as the respective anchoring wedges are designed to conform to the surface of the wall of the holes 9 and the outer wall of the tendons 1. It is also essential that at least two anchoring wedges lying opposite one another are provided.
- this has truncated pyramid-shaped holes 9 with a rectangular cross section, in which tendons are anchored by two mutually opposite anchoring wedges 7 according to the embodiment shown in FIG. 4.
- the anchoring wedges 7 each lie in a row on the two opposite sides of the tendon.
- tensioning straps with four tensioning elements 1 each are anchored in a truncated pyramid-shaped hole 9, the anchoring wedges 7 being arranged one behind the other on two opposite longitudinal sides of the tensioning element or tensioning strap.
- FIGS. 12 and 13 can be produced in such a way that for each ring sector-shaped anchoring wedge 7, a blank 7 'according to FIG. 13 with a rectangular cross section is used, four such blanks 7 12, are clamped around a core 11, as shown in FIG. 12, and - together, for example in an automatic wedge lathe or a lathe, are brought into a conical shape, the part 7 "shown in broken lines in FIG. 13 being removed.
- the blank can be round or flat on the side facing away from the core 1 1.
- the wedges 7 are removed from the core 11 and the teeth 12 for holding the tendon in the hole 9 of the anchor head or anchor body 8 are produced with an embossing roller 13.
- Such serrations can also be caused by any other form of roughening, e.g. Pimples, be replaced. If the blank has a multiple length of the required wedge 7, the wedges are cut to length from the blank before or after application to the core 11.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT00958034T ATE271150T1 (en) | 1999-09-07 | 2000-08-30 | TENSIONING ELEMENT, ANCHORING OF THE TENSILE AND METHOD FOR PRODUCING THE ANCHORAGE |
AU69725/00A AU6972500A (en) | 1999-09-07 | 2000-08-30 | Tensioning mechanism, anchoring wedge for anchoring said tensioning mechanism and method for producing said anchoring wedge |
DE50007086T DE50007086D1 (en) | 1999-09-07 | 2000-08-30 | TENSION, ANCHORING OF TENSION AND METHOD FOR PRODUCING THE ANCHOR |
EP00958034A EP1210478B1 (en) | 1999-09-07 | 2000-08-30 | Tensioning mechanism, anchoring of said tensioning mechanism and method for producing said anchoring |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA1536/99 | 1999-09-07 | ||
AT153699 | 1999-09-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001018306A2 true WO2001018306A2 (en) | 2001-03-15 |
WO2001018306A3 WO2001018306A3 (en) | 2001-09-13 |
Family
ID=3515604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2000/000232 WO2001018306A2 (en) | 1999-09-07 | 2000-08-30 | Tensioning mechanism, anchoring wedge for anchoring said tensioning mechanism and method for producing said anchoring wedge |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1210478B1 (en) |
AU (1) | AU6972500A (en) |
DE (1) | DE50007086D1 (en) |
WO (1) | WO2001018306A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1164232A3 (en) * | 2000-06-15 | 2002-07-31 | Hermann Thal | Wrapping of prestressing elements |
CN104452373A (en) * | 2014-11-26 | 2015-03-25 | 胡国良 | Drag rope and method for manufacturing drag rope |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB885265A (en) * | 1960-08-25 | 1961-12-20 | Mccalls Macalloy Ltd | Wedge anchors for gripping prestressing tendons |
DE2515423A1 (en) * | 1974-04-26 | 1975-11-13 | Felten & Guilleaume Ag Oester | Structural connecting-cable wires in plastic bedding anchorage - with malleable layer between cables and clamp surfaces for isostatic pressure transfer |
DE2633821A1 (en) * | 1976-07-28 | 1978-06-15 | Holzmann Philipp Ag | Single or clustered stressed concrete steel rod(s) - of rectangular cross section with one surface ribbed and parallel surface smooth |
EP0505351A1 (en) * | 1991-03-19 | 1992-09-23 | Vorspann-Technik Gesellschaft m.b.H. | Tensioning strand for prestressed concrete structures |
FR2675523A1 (en) * | 1991-04-22 | 1992-10-23 | Scetauroute | Stay cable, in particular for cable-stayed bridge, consisting of a bundle of identical strands each formed by several wires (filaments) |
-
2000
- 2000-08-30 AU AU69725/00A patent/AU6972500A/en not_active Abandoned
- 2000-08-30 WO PCT/AT2000/000232 patent/WO2001018306A2/en active IP Right Grant
- 2000-08-30 EP EP00958034A patent/EP1210478B1/en not_active Expired - Lifetime
- 2000-08-30 DE DE50007086T patent/DE50007086D1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB885265A (en) * | 1960-08-25 | 1961-12-20 | Mccalls Macalloy Ltd | Wedge anchors for gripping prestressing tendons |
DE2515423A1 (en) * | 1974-04-26 | 1975-11-13 | Felten & Guilleaume Ag Oester | Structural connecting-cable wires in plastic bedding anchorage - with malleable layer between cables and clamp surfaces for isostatic pressure transfer |
DE2633821A1 (en) * | 1976-07-28 | 1978-06-15 | Holzmann Philipp Ag | Single or clustered stressed concrete steel rod(s) - of rectangular cross section with one surface ribbed and parallel surface smooth |
EP0505351A1 (en) * | 1991-03-19 | 1992-09-23 | Vorspann-Technik Gesellschaft m.b.H. | Tensioning strand for prestressed concrete structures |
FR2675523A1 (en) * | 1991-04-22 | 1992-10-23 | Scetauroute | Stay cable, in particular for cable-stayed bridge, consisting of a bundle of identical strands each formed by several wires (filaments) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1164232A3 (en) * | 2000-06-15 | 2002-07-31 | Hermann Thal | Wrapping of prestressing elements |
CN104452373A (en) * | 2014-11-26 | 2015-03-25 | 胡国良 | Drag rope and method for manufacturing drag rope |
Also Published As
Publication number | Publication date |
---|---|
WO2001018306A3 (en) | 2001-09-13 |
DE50007086D1 (en) | 2004-08-19 |
EP1210478B1 (en) | 2004-07-14 |
EP1210478A2 (en) | 2002-06-05 |
AU6972500A (en) | 2001-04-10 |
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