WO2005050054A1 - Amortisseur de cables de ponts suspendus - Google Patents

Amortisseur de cables de ponts suspendus Download PDF

Info

Publication number
WO2005050054A1
WO2005050054A1 PCT/CA2004/001942 CA2004001942W WO2005050054A1 WO 2005050054 A1 WO2005050054 A1 WO 2005050054A1 CA 2004001942 W CA2004001942 W CA 2004001942W WO 2005050054 A1 WO2005050054 A1 WO 2005050054A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
stay tube
damping element
damping
viscous
Prior art date
Application number
PCT/CA2004/001942
Other languages
English (en)
Inventor
Trevor C. Haskett
Original Assignee
Motioneering Inc.
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 Motioneering Inc. filed Critical Motioneering Inc.
Publication of WO2005050054A1 publication Critical patent/WO2005050054A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • 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
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/54—Arrangements for attachment

Definitions

  • the present invention relates to long span bridges in general and to cable- stayed bridges in particular.
  • the invention is primarily concerned with damping vibrations in the stay cables themselves.
  • a cable-stayed bridge supports the deck or roadway from a plurality of cables that are connected at one end either to the top of a support tower or along the vertical extent of such a tower. The cables are connected at the other end thereof to the deck or roadway, along the edges, or perhaps along the centerline of the deck.
  • Such bridges require less cable than typical suspension bridges; they can be constructed from identical pre-cast concrete sections; and they take less time to build than suspension bridges. They also have an aesthetic appeal that can influence the awarding of construction contracts.
  • the present invention attempts to overcome the technical limitation of the devices described above.
  • the present invention utilizes a traditional viscous damper, such as a shock absorber (piston and cylinder arrangement).
  • a traditional viscous damper such as a shock absorber (piston and cylinder arrangement).
  • a damper normal to the cable axis to provide the desired damping, but it becomes clear that there is very little space between the outer surface of the cable and the inner surface of a stay tube.
  • the viscous damper is aligned parallel to the cable within the annular region between the cable and stay tube.
  • a toggle-like mechanism, or a series of such mechanisms is utilized to translate the transverse motion of the cable into motion in the direction parallel to the cable longitudinal axis, which is also the axis of the viscous damper.
  • the present invention may be considered as providing an arrangement for damping vibrational forces between a first movable component of a structure having an axis and a second fixed component of the structure spaced from the first component.
  • the invention provides a viscous damping element positioned within the space between the components with the direction of damping action of the element being generally parallel to the axis of the first component.
  • a toggle mechanism is positioned at each end of the element, each toggle mechanism being pivotally connected to both the element and to each of the first and second components, whereby vibrations induced in the first component relative to the second component are transmitted to the viscous damping element by way of the toggle mechanisms such that the viscous damping element will dampen such vibrations.
  • the invention relates to an arrangement for damping transverse vibrations in a cable of a cable-stayed bridge, the cable extending between an associated tower and a deck of the bridge, the cable having a stay tube surrounding the cable at at least one end thereof, defining an annular space between the outer surface of the cable and the inner surface of the stay tube.
  • At least one viscous damping element is positioned within the annular space such that its direction of damping action is generally parallel to the longitudinal axis of the cable.
  • a toggle mechanism is provided at each end of the viscous damping element to connect the element at each such end thereof to the cable and to the stay tube. Transverse vibrations occurring in the cable are transmitted to the viscous damping element by way of the toggle mechanism, causing the viscous damping mechanism to compress or lengthen and to thereby dampen the cable vibrations.
  • Figure 1 illustrates schematically a prior art representation of a cable-stayed bridge.
  • Figure 2 illustrates a cable extending through a stay tube at one end of a cable.
  • Figure 3 illustrates an end view of a cable and stay tube configuration with a damping arrangement according to this invention mounted thereto.
  • Figure 4 illustrates a cross-sectional view of the damping arrangement of this invention on the line A-A of Figure 3.
  • Figure 5 illustrates a cross-sectional view of an alternative damping arrangement for this invention.
  • FIG. 1 illustrates in a schematic sense a cable-stayed bridge 10 of the prior art.
  • the bridge 10 includes a deck or roadway 12 extending from shore to shore across a river R.
  • a pair of towers 14 extend vertically above the deck 12, either in the centre of the deck width or adjacent the edges of the deck.
  • the towers are anchored to the ground and support the full live weight of the bridge and its load.
  • a plurality of cables 16 extend from each tower to be anchored at the deck itself. Different arrangements for the cables, as for example the parallel attachment pattern as shown and a radial attachment pattern (not shown) can be employed.
  • FIG 2 shows a perspective view of a cable 16 at one end thereof wherein it is seen that the cable passes through a so-called "stay tube” 18 which protects the cable adjacent its end anchor points.
  • the stay tubes are fixed to the deck and/or to the tower, such that the cables will move transversely relative thereto at one end of the tube when vibrating under the influence of high winds or other forces.
  • an annular space 20 is created between the outer surface 22 of the cable and the inner surface 24 of the stay tube 18.
  • At least one linear or non-linear acting viscous damping element 26 is positioned within the space 20 with its direction of action being generally parallel to the longitudinal axis 28 of the cable 16.
  • the direction of action is shown by the double headed arrow 30.
  • the viscous damping element can be an "off-the-shelf" product, similar to an automotive shock absorber. Typically it will have a piston and cylinder structure, with a rod 32 connected to a piston within a cylinder 34.
  • the cylinder contains a viscous damping fluid which inhibits the reciprocal movement of the piston and rod structure.
  • the fluid will have limited compressibility and the piston will be provided with aperture means which allows a small volume of fluid to pass therethrough during reciprocal movement of the piston and rod.
  • each toggle mechanism will involve a pair of links 38, 40 with the links 38 pivotally connected to the viscous damping element and to the inner surface 24 of the stay tube 18 and the links 40 pivotally connected to the viscous damping element and to the outer surface 22 of the cable 16.
  • a single damping arrangement in accordance with this invention will operate to reduce or dampen vibrations within the space 20 it is preferred that a minimum of three such arrangements be located within the space 20 as is clearly seen in Figure 3, the arrangements being equiangularly spaced apart by about 120°.
  • FIG. 5 An alternative arrangement for mounting a viscous damping element within the space 20 is shown schematically in Figure 5.
  • the viscous damping element 26 is pivotally connected to a lug 42 mounted to either the inner surface of the stay tube 18 or to the outer surface of the cable 16, as by a link 44.
  • the rod 32 of the element 26 is pivotally connected to another link 46 which is pivotally connected to a second lug 48 mounted to the inner surface of the stay tube.
  • the opposite end of the link 46 is slidably received in a slot 50 of a flange 52 mounted to the cable 16.
  • the operation of this arrangement is similar to the operation of the first embodiment in that transverse vibrations of the cable 16 relative to the stay tube 18 are transmitted to the viscous damping element 26 which in turn will counteract those vibrations.
  • the principles of the present invention although developed for a cable-stayed bridge, are not restricted to such an application.
  • the invention could be applied as a tuned mass damper for a chimney or other similar structure, wherever an annular ring of steel or other material is suspended near the top of the chimney or stack.
  • a plurality of viscous damping arrangements in accordance with the invention could be utilized to reduce or eliminate vibrations created by wind or other forces.
  • the present invention will allow the motions to be transformed into another plane where space is often available for the use of such a viscous damper, including but not restricted to car seats and washing machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

Selon l'invention, une amélioration est apportée à l'amortissement des vibrations dans les câbles de ponts suspendus (16), grâce à la présence d'un ou plusieurs éléments d'amortissement visqueux (26) dans l'espace (20) compris entre le câble (16) et un tube de suspension voisin (18). La direction d'action des éléments d'amortissement est généralement parallèle à l'axe longitudinal du câble. Dans un mode de réalisation, un mécanisme de basculement (36) se trouve à chaque extrémité d'un élément d'amortissement visqueux (26) pour relier l'élément à la fois au tube de suspension et au câble. Chaque mécanisme de basculement (36) est connecté de façon à pouvoir pivoter, à l'élément d'amortissement visqueux (26) ainsi qu'au tube de suspension (18) et au câble (16) de sorte que des vibrations transversales subies par le câble, sont transmises via le mécanisme de basculement à l'élément d'amortissement visqueux pour amortir efficacement ces vibrations. Dans un scénario typique, l'élément d'amortissement visqueux (26) est un système piston cylindre avec un liquide contenu dans le cylindre, similaire à un amortisseur automobile.
PCT/CA2004/001942 2003-11-19 2004-11-10 Amortisseur de cables de ponts suspendus WO2005050054A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2450089 2003-11-19
CA 2450089 CA2450089A1 (fr) 2003-11-19 2003-11-19 Amortisseur de cables d'etai

Publications (1)

Publication Number Publication Date
WO2005050054A1 true WO2005050054A1 (fr) 2005-06-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2004/001942 WO2005050054A1 (fr) 2003-11-19 2004-11-10 Amortisseur de cables de ponts suspendus

Country Status (2)

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CA (1) CA2450089A1 (fr)
WO (1) WO2005050054A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102277831A (zh) * 2011-05-13 2011-12-14 大连海事大学 一种斜拉桥梁的斜拉索结构
CN102561184A (zh) * 2011-12-30 2012-07-11 中铁大桥局集团武汉桥梁科学研究院有限公司 一种斜拉索外置式竖向减振装置
CN103590320A (zh) * 2013-11-25 2014-02-19 大连海事大学 一种斜拉桥的斜拉索减振装置
CN105780651A (zh) * 2014-12-26 2016-07-20 上海浦江缆索股份有限公司 抗振拉索
TWI548796B (zh) * 2013-12-30 2016-09-11 Univ Chienkuo Technology Oblique bridge cable vibration dampers
CN110485267A (zh) * 2019-09-03 2019-11-22 哈尔滨工业大学（深圳） 一种基于剪切增稠液的附着式自调谐质量阻尼器及其使用方法
CN114458726A (zh) * 2022-01-20 2022-05-10 山东高速集团有限公司创新研究院 一种桥梁斜拉索的减振装置
CN105780651B (zh) * 2014-12-26 2024-06-04 上海浦江缆索股份有限公司 抗振拉索

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110258317B (zh) * 2019-06-28 2024-05-28 中铁大桥科学研究院有限公司 一种桥梁用的双支撑阻尼器放大装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1151256A (fr) * 1980-01-24 1983-08-02 Slater Steel Industries Limited Amortisseur d'oscillations et vibrations a l'endroit de lignes aeriennes simples ou en faisceau, lesdits phenomenes etant attribuables a la force des vents
CA1301786C (fr) * 1987-04-27 1992-05-26 Shimizu Construction Co., Ltd. Methode permettant de limiter les vibrations dans un plancher et appareil connexe
US5857712A (en) * 1996-08-20 1999-01-12 Sumitomo Rubber Industries, Ltd. Cable damping device
JP2003120752A (ja) * 2001-10-16 2003-04-23 Sumitomo Rubber Ind Ltd 制振装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1151256A (fr) * 1980-01-24 1983-08-02 Slater Steel Industries Limited Amortisseur d'oscillations et vibrations a l'endroit de lignes aeriennes simples ou en faisceau, lesdits phenomenes etant attribuables a la force des vents
CA1301786C (fr) * 1987-04-27 1992-05-26 Shimizu Construction Co., Ltd. Methode permettant de limiter les vibrations dans un plancher et appareil connexe
US5857712A (en) * 1996-08-20 1999-01-12 Sumitomo Rubber Industries, Ltd. Cable damping device
JP2003120752A (ja) * 2001-10-16 2003-04-23 Sumitomo Rubber Ind Ltd 制振装置

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102277831A (zh) * 2011-05-13 2011-12-14 大连海事大学 一种斜拉桥梁的斜拉索结构
CN102277831B (zh) * 2011-05-13 2012-12-26 大连海事大学 一种斜拉桥梁的斜拉索结构
CN102561184A (zh) * 2011-12-30 2012-07-11 中铁大桥局集团武汉桥梁科学研究院有限公司 一种斜拉索外置式竖向减振装置
CN102561184B (zh) * 2011-12-30 2014-10-29 中铁大桥局集团武汉桥梁科学研究院有限公司 一种斜拉索外置式竖向减振装置
CN103590320A (zh) * 2013-11-25 2014-02-19 大连海事大学 一种斜拉桥的斜拉索减振装置
CN103590320B (zh) * 2013-11-25 2016-08-17 大连海事大学 一种斜拉桥的斜拉索减振装置
TWI548796B (zh) * 2013-12-30 2016-09-11 Univ Chienkuo Technology Oblique bridge cable vibration dampers
CN105780651A (zh) * 2014-12-26 2016-07-20 上海浦江缆索股份有限公司 抗振拉索
CN105780651B (zh) * 2014-12-26 2024-06-04 上海浦江缆索股份有限公司 抗振拉索
CN110485267A (zh) * 2019-09-03 2019-11-22 哈尔滨工业大学（深圳） 一种基于剪切增稠液的附着式自调谐质量阻尼器及其使用方法
CN114458726A (zh) * 2022-01-20 2022-05-10 山东高速集团有限公司创新研究院 一种桥梁斜拉索的减振装置
CN114458726B (zh) * 2022-01-20 2023-05-23 山东高速集团有限公司创新研究院 一种桥梁斜拉索的减振装置

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