EP1606456B1 - Cable de structure d'ouvrage d'art - Google Patents

Cable de structure d'ouvrage d'art Download PDF

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Publication number
EP1606456B1
EP1606456B1 EP03740531A EP03740531A EP1606456B1 EP 1606456 B1 EP1606456 B1 EP 1606456B1 EP 03740531 A EP03740531 A EP 03740531A EP 03740531 A EP03740531 A EP 03740531A EP 1606456 B1 EP1606456 B1 EP 1606456B1
Authority
EP
European Patent Office
Prior art keywords
reinforcements
guide member
cable
anchoring
structure 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.)
Expired - Lifetime
Application number
EP03740531A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1606456A1 (fr
Inventor
Benoît Lecinq
Jean-Pierre Messein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Soletanche Freyssinet SA
Original Assignee
Freyssinet SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Freyssinet SAS filed Critical Freyssinet SAS
Priority to SI200331787T priority Critical patent/SI1606456T1/sl
Publication of EP1606456A1 publication Critical patent/EP1606456A1/fr
Application granted granted Critical
Publication of EP1606456B1 publication Critical patent/EP1606456B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports

Definitions

  • the present invention relates to the field of cables used in construction to participate in the structure of certain structures.
  • such a stay includes a bundle of parallel reinforcements extending between two anchoring zones, one arranged on a pylon of the structure, and the other on the suspended part.
  • the individual reinforcements of the stay have a slight divergence in order to be able to block them individually.
  • the bending stresses are reflected in the anchoring zones, and may damage the reinforcement and / or the anchoring devices.
  • the document WO 00/75453 discloses an anchoring device for a structural cable such as a stay, provided with guide means comprising an individual guide duct for each frame, this duct flaring towards the current portion of the cable so as to allow a angular deflection of the armature.
  • This anchoring device has the advantage of ensuring a gradual recovery of the bending forces due to the convergence of the reinforcements towards the current part, or certain transverse actions undergone by the stay. But this recovery of effort may prove insufficient in the presence of sudden stress variations suffered in the event of an earthquake.
  • An object of the present invention is to propose an arrangement allowing the structural cables and the structures of which they form part of withstand the heavy demands that occur in the event of an earthquake.
  • the structural cable comprises at least one guide member in close contact around the armature assembly, having an inner surface whose cross section is adapted to the peripheral shape of the parallel beam and whose longitudinal section has a convex curvature which, over the length of the guide member, admits angular deflections of the reinforcements substantially greater than the maximum angle of convergence of the reinforcements between the anchoring device and the current part of the cable.
  • the shape of the guide member allows it to absorb strong angular deflections of the armature assembly, with a controlled radius of curvature to avoid damaging the reinforcements and the anchoring device.
  • This member has a tubular general shape with an inner surface to be applied in close contact around a set of tensile reinforcements, the set of reinforcements converging between an anchoring device and a running part of the cable where the reinforcements are gathered in a parallel beam more compact than at the anchoring device, said inner surface having a cross section adapted to the peripheral shape of said beam and a longitudinal section having a convex curvature which, along the length of the guidance, admits angular deflections of the reinforcements substantially greater than the maximum convergence angle of the reinforcements between the anchoring device and the current portion of the cable.
  • Said inner surface preferably has a hexagonal or circular cross section.
  • a cable-stayed bridge is schematically illustrated by the figure 1 .
  • the deck 1 of the bridge is supported by sheets of guy 2 at one or more pylons 3 erected in the area crossed by the bridge.
  • Each stay 2 follows a determined path between a low anchoring device 4 mounted on the deck 1 and a high anchoring device 5 mounted on the tower 3.
  • the figure 2 shows in more detail the structure of the stay in the area of the deck where the anchoring device 4 is located.
  • the stay 2 comprises a set of traction plates 10 constituted, in the example in question, by metal strands each coated with an individual sheath of plastic material.
  • the strands 10 are gathered in a compact parallel beam.
  • the transverse disposition of the strands 10 in the running part is for example that illustrated by the figure 5 , where the compactness is maximum since the strands, of circular outer shape, are in contact with each other in a hexagonal mesh.
  • a deflector collar 11 disposed remote from the anchor 4 is clamped around the set of strands to make them converge.
  • the anchoring device 4 comprises a metal block 15 shown in cross-section on the figure 3 .
  • the block 15 is traversed by parallel orifices 16, cylindrical towards the current part of the stay and frustoconical towards the opposite direction.
  • Each orifice 16 receives a strand strand and an anchor jaw constituted by several wedges in the form of truncated cone sector.
  • the orifices 16 have a certain spacing between them in order to have room for housing the anchoring jaws and to obtain a sufficiently robust block.
  • the transverse mesh of these orifices is homothetic of that of the strands in the current part of the cable. This is why the strands converge from the anchoring device 4 to the current part.
  • the individual sheath of the strands 10 is interrupted in a chamber 17 at the rear of the anchor block 15.
  • the residual interstices of the block and the chamber 17 are filled with a corrosion protection material such as a fat.
  • a sealing system 18, for example of the stuffing box type as described in the European patent 0 323 285 closes the chamber 17 opposite the block 15 by sealing around the individual sheaths of the strands 10.
  • the anchoring device 4 may also comprise individual guide ducts of the strands, as described in the document WO 00/75453 , flaring towards the running portion of the cable so as to allow angular deflection of the individual strands.
  • the anchoring device 4 bears longitudinally against a tube 20 connected to the structure of the deck 1 or the pylon 3 in order to transmit the tensile force of the stay.
  • the stay shown on the figure 2 is equipped with a vibration damping device 21, which is on the apron side at a distance (a few meters) from the anchoring device 4.
  • This device 21 serves to damp the transverse vibrations of the stay 2 with respect to the tube 20 and to the anchoring device 4, due to the dynamic variations of load related to the traffic on the bridge or the aerodynamic forces.
  • It is for example of the type described in the European patent 0 914 521 , with an annular chamber between the deflector collar 11 and a support tube 22 fixed to the end of the tube 20, this chamber containing a viscous material providing the damping effect.
  • the viscous damping device could be mounted on an arm extending transversely between the stay and the deck 1 (see European patent 0 343 054 ).
  • the stay thus equipped has a certain capacity to admit overall displacements of the strands with respect to the structure.
  • the lever arm between the exit of the anchoring device 4 and the collar 11 gives a certain transverse travel to the damper 21, which allows angular movements, preferably in connection with the individual guide ducts of the strands present at the exit anchoring. These angular movements have a limited amplitude, typically about 25 milliradians. Larger deflections could damage the strands by imposing too much curvature on the anchor.
  • a guide member 30 is installed between the anchoring device 4 and the collar 11 before setting up the strands 10.
  • This guide member 30 is of generally cylindrical shape. As shown, the Figures 2 and 4 it may consist of a plastic resin body molded around a reinforcing tube of steel 31.
  • the molded plastic material is advantageously a polyurethane resin, which has the advantages of being easily moldable, which allows the member 30 to be accurately shaped, to have excellent mechanical strength properties (hardness, resistance to shear and tensile stresses), and to behave well in aggressive marine environments.
  • the inner surface 32 of the guide member 30 is in close contact around the strands once they are installed.
  • the cross section of this inner surface 32 is adapted to the peripheral shape of the bundle of parallel strands. In the example shown, it is a hexagonal rection which circumscribes the strands assembled in hexagonal mesh.
  • N + 1 that is to say 7, 19, 37, 61, etc.
  • the compact beam has a hexagonal outer profile, corresponding to n full concentric layers around a central strand.
  • the beam is completed by dummy strands 12 at the deflection member 30.
  • These dummy strands 12 may extend to the collar 11 beyond which they are interrupted. They are not anchored in the device 4.
  • there are 61 - 43 18 dummy strands 12, represented in black on the figure 4 .
  • the strands 10 Since the member 30 is located at an intermediate position between the anchor 4 and the collar 11, the strands 10 have at its level a gap corresponding to a fraction of that which they have in the anchor block 15. To position them accurately by ensuring a good support on the guide member 30 and to prevent them from disorganizing in case of sudden bending stresses, inserts are housed inside the member 30 with all of the strands 10, 12. These inserts may consist of individual plastic sleeves 13 into which the part of the strands 10, 12 is threaded. through a member 30. A stop plate 35 is placed on the back of the anchoring device 4 to prevent this device being disturbed by the ends of the sleeves 13 or dummy strands 12.
  • the cross section of the inner surface 32 of the guide member 30 may also be circular.
  • This recovery of large angular deflections is performed with a controlled radius of curvature to avoid excessive stresses bending strands out of the anchor.
  • This radius of curvature R of the longitudinal section of the inner surface 32 of the member 30 is advantageously at least 3 meters in the rear portion of the member where it is in close contact around the set of strands. In an embodiment with strands with a diameter of 15.7 mm, the radius of curvature R in this rear portion will typically be 4 meters.
  • This radius of curvature R can be constant over the length L of the member 30.
  • the guide member 30 To reduce the bulk of the guide member 30, it is possible to forming its inner surface 32 so that the radius of curvature of its longitudinal section decreases going from the rear portion where the member is in close contact around the strands 10 towards the current part of the stay. This is possible without much risk of damage to the strands since the largest angular deflections in the event of an earthquake tend to occur when the axial stress is not very strong on the stay: it can then be assumed that a strand less biased axially follows a curvature a little longer tight.
  • the smallest radius of curvature at the front end of the member 30 is for example of the order of 2.5 meters.
  • the guide member 30 is mounted floating relative to the anchor 4.
  • the member 30 has a transverse movement capacity relative to the tube 20 and the anchoring device 4. This avoids reducing the stroke available for the operation of the damper 21 and thus to degrade its dynamic behavior.
  • This transverse movement capacity of the guide member 30 is limited so as to provide a determined travel of the damper 21.
  • the floating guide member 30 is in principle held longitudinally because it is in close contact around the set of strands. To avoid, however, that it undergoes significant displacements, it can be extended axially by spacers 33, 34, for example of tubular shape, which respectively abut on the damper 21 and the stop plate 35 in case of longitudinal movements .
  • this connection is provided by bolts 40 which axially clamp flanges 38, 39 respectively formed at the ends facing the tube 20 and the support 22.
  • the diameter of these bolts 40 is selected so that they break before that the transverse force reaches 4% of the axial force, which limits the bending moment transferred to the tube 20 and allows operation of the guide member 30 under optimal conditions.
  • a guide member 30 as described above may be placed at a high anchor towards the pylon. It can also be put in place without there is a vibration damping device on the stay.
  • the guide member 30 may belong to the deflection means reinforcements which converge in a compact beam. It can in particular replace the collar 11 shown on the figure 2 if the congestion constraints in the anchoring zone allow it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Resistance Heating (AREA)
  • Ropes Or Cables (AREA)
  • Insulated Conductors (AREA)
  • Electric Cable Installation (AREA)
  • Cable Accessories (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
EP03740531A 2003-03-24 2003-03-24 Cable de structure d'ouvrage d'art Expired - Lifetime EP1606456B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200331787T SI1606456T1 (sl) 2003-03-24 2003-03-24 Strukturni gradbeni kabel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2003/000921 WO2004094730A1 (fr) 2003-03-24 2003-03-24 Cable de structure d'ouvrage d'art

Publications (2)

Publication Number Publication Date
EP1606456A1 EP1606456A1 (fr) 2005-12-21
EP1606456B1 true EP1606456B1 (fr) 2010-02-17

Family

ID=33306136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03740531A Expired - Lifetime EP1606456B1 (fr) 2003-03-24 2003-03-24 Cable de structure d'ouvrage d'art

Country Status (10)

Country Link
US (1) US7124460B2 (es)
EP (1) EP1606456B1 (es)
JP (1) JP4335151B2 (es)
AT (1) ATE458089T1 (es)
AU (1) AU2003304059A1 (es)
DE (1) DE60331372D1 (es)
ES (1) ES2338779T3 (es)
PT (1) PT1606456E (es)
SI (1) SI1606456T1 (es)
WO (1) WO2004094730A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104452588A (zh) * 2014-11-25 2015-03-25 中铁第四勘察设计院集团有限公司 桥梁钢主梁剪压承载式锚拉板结构

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE541967T1 (de) * 2005-03-17 2012-02-15 Dow Global Technologies Llc Aus copolymeren von ethylen/alpha-olefinen hergestellte fasern
FR2897623B1 (fr) * 2006-02-17 2008-04-11 Eiffage Tp Sa Dispositif de protection au feu d'un cable ou analogue d'ouvrage d'art ou de genie civil
US20120260590A1 (en) 2011-04-12 2012-10-18 Lambert Walter L Parallel Wire Cable
US8474219B2 (en) 2011-07-13 2013-07-02 Ultimate Strength Cable, LLC Stay cable for structures
DE102011106431B3 (de) * 2011-07-04 2012-10-25 Dywidag-Systems International Gmbh Anordnung zum Abstützen eines Zugglieds, insbesondere eines Schrägseils, quer zu seiner Längserstreckungsrichtung
WO2013150329A1 (en) * 2012-04-05 2013-10-10 Soletanche Freyssinet Seal for cable anchor device of a cable construction
GB2514621B (en) * 2013-05-31 2020-04-15 Vsl Int Ag Cable anchorage
CN106638307A (zh) * 2015-11-04 2017-05-10 襄阳中铁宏吉工程技术有限公司 一种深埋锚具
CN109958056A (zh) * 2019-04-15 2019-07-02 武汉地震工程研究院有限公司 智能拉索、智能拉索制备方法以及智能拉索安全状态检测方法
KR200494644Y1 (ko) * 2019-11-21 2021-11-22 다올이앤씨 주식회사 강연선 클램핑용 더미 구조체

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CH608059A5 (es) * 1976-02-09 1978-12-15 Bureau Bbr Ltd
JPS59173712U (ja) * 1983-05-09 1984-11-20 株式会社　春本鐵工所 橋梁ケ−ブルのアンカ−ソケツト
DE3437350A1 (de) * 1984-08-30 1986-03-13 Ulrich Dr.Ing. e.h. Dr.Ing. 8000 München Finsterwalder Kabel fuer bauwerke, insbesondere schraegkabelbruecken und verfahren zu dessen herstellung
DE3437107A1 (de) * 1984-10-10 1986-04-10 Dyckerhoff & Widmann AG, 8000 München Zugglied, insbesondere schraegseil fuer eine schraegseilbruecke
FR2592666B1 (fr) 1986-01-07 1988-03-11 Sogelerg Systeme de sustentation par cable souple a encastrement local, notamment pour pont a haubans
US5173982A (en) * 1991-07-25 1992-12-29 Greiner Inc, Southern Corrosion protection system
FR2780127B1 (fr) * 1998-06-19 2000-09-08 Freyssinet Int Stup Procede et dispositif d'accrochage d'un element transmetteur de charge sur un cable, et pont suspendu comportant de tels dispositifs
EP1013830A1 (fr) * 1998-12-24 2000-06-28 Freyssinet International Stup Dispositif et procédé de fixation entre un element de construction et un cable de structure, et pont suspendu comportant de tels dispositifs
FR2794484B1 (fr) 1999-06-03 2001-08-03 Freyssinet Int Stup Dispositif d'ancrage d'un cable de structure
FR2798408B1 (fr) * 1999-09-15 2002-01-18 Freyssinet Int Stup Cable a fils paralleles pour structure d'ouvrage de construction, ancrage d'un tel cable, et procede d'ancrage
FR2798410B1 (fr) * 1999-09-15 2001-11-23 Freyssinet Int Stup Dispositif d'ancrage pour fixer un cable de structure a un element de construction
NO321272B1 (no) * 2000-05-31 2006-04-10 Aker Kvaerner Subsea As Strekklegeme
NO317009B1 (no) * 2000-12-22 2004-07-19 Deep Water Composites As Endeterminering av strekkstag
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JP3875877B2 (ja) * 2001-11-14 2007-01-31 極東鋼弦コンクリート振興株式会社 緊張材の定着具

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104452588A (zh) * 2014-11-25 2015-03-25 中铁第四勘察设计院集团有限公司 桥梁钢主梁剪压承载式锚拉板结构

Also Published As

Publication number Publication date
US7124460B2 (en) 2006-10-24
ATE458089T1 (de) 2010-03-15
EP1606456A1 (fr) 2005-12-21
DE60331372D1 (de) 2010-04-01
US20050252675A1 (en) 2005-11-17
PT1606456E (pt) 2010-03-31
WO2004094730A1 (fr) 2004-11-04
SI1606456T1 (sl) 2010-05-31
ES2338779T3 (es) 2010-05-12
AU2003304059A1 (en) 2004-11-19
JP2006514179A (ja) 2006-04-27
JP4335151B2 (ja) 2009-09-30

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