EP0022665B1 - Bridge bearing - Google Patents

Bridge bearing Download PDF

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Publication number
EP0022665B1
EP0022665B1 EP80302352A EP80302352A EP0022665B1 EP 0022665 B1 EP0022665 B1 EP 0022665B1 EP 80302352 A EP80302352 A EP 80302352A EP 80302352 A EP80302352 A EP 80302352A EP 0022665 B1 EP0022665 B1 EP 0022665B1
Authority
EP
European Patent Office
Prior art keywords
rubber
layer
elements
bearing
key
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
Application number
EP80302352A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0022665A1 (en
Inventor
William Ernest Reeve
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.)
Dixon International Ltd
Original Assignee
Dixon International Ltd
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 Dixon International Ltd filed Critical Dixon International Ltd
Priority to AT80302352T priority Critical patent/ATE18079T1/de
Publication of EP0022665A1 publication Critical patent/EP0022665A1/en
Application granted granted Critical
Publication of EP0022665B1 publication Critical patent/EP0022665B1/en
Expired 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
    • E01D19/04—Bearings; Hinges
    • E01D19/041—Elastomeric bearings

Definitions

  • the present invention relates to bridge bearings and more particularly to bridge bearings made of laminated rubber and metal.
  • a bridge bearing is to compensate for relative movement between a bridge beam and a support, such as a pier or abutment, for the bridge beam. This movement may be caused, for example, by expansion and contraction resulting from temperature changes or settlement of the support or by heavy vehicles travelling over the bridge. If means are not provided to compensate for such movement, cracking and ultimate failure of the bridge beam or the support may result.
  • a known bridge bearing comprises an upper element, at least one intermediate element and a lower element, the elements being bonded together (DE-A-2 024386).
  • the upper and lower elements each consist of a metal plate and layer of rubber on one face of the plate.
  • the or each intermediate element consists of a layer of rubber sandwiched between two metal plates.
  • the elements are stacked in alignment with the metal plates in contact one with another and with the adjacent metal plates of contiguous elements mechanically keyed together.
  • the mechanical keying may be provided by keying members constituted by rings and discs which are located in holes in adjacent metal plates and between adjacent layers of rubber. A plurality of the keying members are provided between each two adjacent elements to key those elements together.
  • the uppermost and lowermost metal plates each have to be fixed relative to the beam and the support respectively. This is usually achieved, where the beam and the support are of concrete, by casting bolts or shaped bars into the beam and the support for engagement with the respective metal plates.
  • a bridge bearing comprising a plurality of separable elements each comprising at least one metal plate, at least one of the elements having a layer of rubber disposed between two metal plates, the elements being arranged in a stack, the layer(s) of rubber being capable of absorbing relative horizontal movement about a horizontal axis between the top and bottom of the stack, there being present at least one pair of adjacent metal plates of adjacent elements, characterized in that each metal plate of said at least one pair has adjacent the other metal plate a recess of a shape which is acircular in plan view formed therein, the or each pair of said adjacent metal plates of adjacent elements being restrained from relative rotation about a vertical axis by a key located in the recesses of those plates.
  • the layer(s) of rubber may also serve for absorbing relative horizontal translational movement between the top and bottom of the stack.
  • the or each key must be acircular in plan view and is preferably of like shape in plan view to the recesses in which it is located.
  • the or each recess comprises, in plan view, or least two arms at an angle to each other and the or each key comprises two arms at an angle to each other.
  • each recess is cruciform and the or each key is cruciform in plan view.
  • the lowermost element comprises a layer of rubber on the lower surface of its metal plate.
  • the uppermost element comprises a layer of rubber on the upper surface of the metal plate.
  • each element comprises a layer of rubber on each of the upper and lower surfaces of the metal plate or plates, the layers of rubber being integral with each other at the periphery of the plate or plates to protect the plate or plates against corrosion.
  • the bridge bearing may comprise a first element including a layer of low friction polymeric material (such as polytetrafluoroethylene) and a second element including a smooth metal surface, the layer of low friction polymeric material bearing on the smooth metal surface to allow relative horizontal translational sliding movement between the first and second elements (and thus between the top and bottom of the stack).
  • a first element including a layer of low friction polymeric material (such as polytetrafluoroethylene)
  • a second element including a smooth metal surface
  • the first bridge bearing comprises an upper element 1, a plurality of intermediate elements 2, and a lower element 3.
  • the upper element 1 comprises a steel plate 4 having a layer 5 of rubber on its upper surface and a thin layer 6 of rubber on its lower surface.
  • the layers 5 and 6 are integrally formed with a rubber strip portion 7 surrounding the entire periphery of the plate 4.
  • Each of the intermediate elements 2 comprises a thick layer 10 of rubber sandwiched between two steel plates 11 and a thin layer 12 of rubber on the sides of the steel plates remote from the thick layer 10.
  • the layers 10 and 12 are integrally formed with a rubber strip portion 13 surrounding the entire periphery of each of the plates 11.
  • the lower element 3 is substantially identical to the upper element 1 (but in the assembled bearing is inverted relative to the element 1) and comprises a steel plate 20 having a thin layer 21 of rubber on its upper surface and a layer 22 of rubber on its lower surface, the layers 21 and 22 being integrally formed with a rubber strip portion 23 surrounding the entire periphery of the plate 20.
  • the upper element 1 is provided with a keyway 31 formed within the entire thickness of the plate 4 and the rubber layer 6 but not extending into the rubber layer 5.
  • the lower element 3 is provided with a keyway 33 formed within the entire thickness of the plate 20 and the rubber layer 21 but not extending into the rubber layer 22.
  • Each of the intermediate elements 2 is provided with two keyways 32, one keyway being formed in the upper rubber layer 12 and the upper plate 11 and the other being formed in the lower rubber layer 12 and the lower plate 11 and neither keyway extending into the rubber layer 10.
  • Figure 4 is a plan view of either one of the intermediate elements 2.
  • a plan view of the lower element 3, an inverted plan view of the upper element 1 or an inverted plan view of either intermediate element 2 would be identical to Figure 4.
  • each keyway 31, 32 or 33 is, in plan view, cruciform and centrally disposed relative to the element in which it is provided.
  • the bearing further comprises steel keys 40, as shown in Figure 5, which are, in plan view, cruciform in shape and of the same dimensions as the keyways 31, 32 and 33.
  • the thickness of each key 40 is equal to twice the depth of one of the keyways.
  • the elements are stacked one on top of another as shown in Figure 2 with a key 40 being located in the adjacent keyways of each pair of adjacent elements.
  • a first key 40 is located in the keyway 33 of the lower element 3 and the lower keyway 32 of the lower intermediate element 2
  • a second key 40 is located in the upper keyway 32 of the lower intermediate element 2 and the lower keyway 32 of the upper intermediate element 2
  • a third key ' 40 is located in the upper keyway 32 of the. upper intermediate element 2 and the keyway 31 of the upper element 1.
  • the bearing In use of the bearing, the bearing is positioned on a concrete pier or abutment 100 of a bridge and a concrete bridge beam 101 positioned on the bearing.
  • the lower element 3 bears on (and frictionally engages) the pier or abutment and the bridge beam bears on (and frictionally engages) the upper element 1.
  • the bridge beam may tend to undergo horizontal translational movement and/or horizontal rotational movement (i.e. rotational movement about a horizontal axis). Such movement is absorbed by deformation of the rubber layers of the bridge bearing, especially the thick rubber layers 10 of the intermediate elements 2. Sliding movement (whether translational movement or horizontal rotational movement) of the elements 1, 2 and 3 relative to each other is prevented by the keys 40.
  • metal plates 4, 11 and 20 and the keys. 40 are entirely encased in rubber and thus are protected against corrosion.
  • the second bridge bearing comprises an upper element 1, an intermediate element 2 and keys 40, these components being identical to the like numbered components of the first bridge bearing.
  • the second bearing further comprises a slide element 50 and a lower element 60.
  • the slide element 50 comprises a steel block 51 and a stainless steel sheet 52 secured, e.g. by adhesive, to the lower face of the block.
  • a keyway 53 of the same shape and dimensions as the keyways 31 and 32 in the upper and intermediate elements 1 and 2.
  • the lower element 60 comprises a steel plate 61 having a layer or rubber 62 on its lower surface and a ptfe (plytetrafluoroethylene) layer 63 on its upper surface.
  • the rubber layer 62 is integrally formed with a thickened edge portion 64 extending around the entire periphery of the metal plate 61 which is encased between the rubber layer 62, the rubber edge portion 64 and the ptfe layer 63.
  • the plate 61 is thus protected from corrosion.
  • the ptfe layer 63 is bonded or screw-fixed to the metal plate 61.
  • the elements are stacked one on top of another as shown in Figure 8 with a single key 40 being located in the adjacent keyways of each pair of adjacent elements. I.e. one key 40 is located in the keyway 53 of the slide element 50 and the lower keyway 32 of the intermediate element 2 and another key 40 is located in the upper keyway 32 of the intermediate element and the keyway 31 of the upper element 1.
  • the lower element 60 bears on (and frictionally engages) a concrete pier or abutment 100 of a bridge and a concrete bridge beam 101 bears on (and frictionally engages) the upper element 1.
  • the bridge beam may tend to undergo horizontal translational movement and/ or horizontal rotational movement and/or vertical rotational movement. Horizontal movement, whether translational or rotational, is absorbed by the element 50 sliding upon the element 60. Vertical rotational movement is absorbed by deformation of the rubber layers of the bridge bearing, especially the thick rubber layer 10 of the intermediate element 2. Sliding movement (whether translational movement or horizontal rotational movement) to the elements 1, 2 and 50 relative to each other is prevented by the keys 40.
  • the intermediate element 2 (and hence one key 40) may be omitted in assembling the bearing.
  • the third bridge bearing comprises upper and lower elements 1 and 3 and the keys 40, these components being identical to the like-numbered components of the first bridge bearing.
  • the third bridge bearing also comprises a slide element 70, a first intermediate element 80 and a second intermediate element 90.
  • the element 70 is identical to the element 50 (described above with reference to the second bridge-bearing) except that the metal block 51 is provided with threaded lateral bores which receive bolts 71 by means of which steel strips 72 are attached to two opposite edges of the block 51.
  • the element 80 comprises a thick layer 81 of rubber sandwiched between an upper steel plate 82 and a lower steel plate 83.
  • a layer 84 of ptfe is provided on the surface of the plate 82 and a thin layer 85 of rubber is provided on the lower surface of the plate 83.
  • the rubber layers 81 and 85 are integrally formed with a strip portion 86 which extends up to the ptfe layer 84. Within the rubber layer 85 and the metal plate 83 is formed a keyway of the same shape and dimensions as the keyways previously described.
  • the element 90 comprises a thick metal plate 91 having keyways 92 formed in its upper and lower faces, the keyways being of the same shape and dimensions as the keyways previously described. Also the plate 91 is provided with threaded lateral bores which receive bolts 93 by means of which steel strips 94 are attached to two opposite edges of the plate 91. A ptfe strip 95 is attached by bonding to each of the steel strips 94.
  • the elements are stacked one on top of another as shown in Figure 10 with a key 40 located in the keyway of the lower element 3 and the lower keyway of the element 90, a key 40 located in the upper keyway of the element 90 and the keyway of the element 80 and a key 40 located in the keyway of the element 70 and the keyway of the element 1.
  • the steel plate 52 rests on the ptfe layer (84) and the strips 72 bear on the ptfe strip 95 attached to the strips 94.
  • the lower element 3 bears on (and frictionally engages) a pier or abutment of a concrete bridge and a concrete bridge beam bears on (and frictionally engages) the upper element 1.
  • the bridge beam may tend to undergo horizontal translational movement in the directions indicated by the arrows A in Figure 11 and such movement is absorbed by sliding movement of the strips 72 along the strips 94.
  • the bridge beam may also tend to undergo vertical rotational movement about an axis normal to the strips 72 and 94. Such movement is absorbed by deformation of the rubber layers especially the thick rubber layer 81.
  • the bridge bearing resists horizontal movement in the directions normal to the arrows A because of the engagement between the strips 72 and the strips 94 and the provision of the keys between the elements 1 and 70 and between the elements 90 and 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sliding-Contact Bearings (AREA)
  • Bridges Or Land Bridges (AREA)
  • Support Of The Bearing (AREA)
EP80302352A 1979-07-17 1980-07-10 Bridge bearing Expired EP0022665B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80302352T ATE18079T1 (de) 1979-07-17 1980-07-10 Brueckenlager.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7924809A GB2054092B (en) 1979-07-17 1979-07-17 Elastomeric stack acting as bridge bearing
GB7924809 1979-07-17

Publications (2)

Publication Number Publication Date
EP0022665A1 EP0022665A1 (en) 1981-01-21
EP0022665B1 true EP0022665B1 (en) 1986-02-19

Family

ID=10506541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80302352A Expired EP0022665B1 (en) 1979-07-17 1980-07-10 Bridge bearing

Country Status (7)

Country Link
EP (1) EP0022665B1 (xx)
JP (1) JPS5620207A (xx)
AT (1) ATE18079T1 (xx)
AU (1) AU543027B2 (xx)
DE (1) DE3071429D1 (xx)
GB (1) GB2054092B (xx)
ZA (1) ZA804283B (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107933A1 (en) * 1982-10-01 1984-05-09 Dixon International Limited Structural slide bearings
US6770374B1 (en) 1998-06-05 2004-08-03 Basf Aktiengesellschaft Composite elements containing compact polyisocyanate polyaddition products
US6790537B1 (en) 1999-03-30 2004-09-14 Basf Aktiengesellschaft Composite elements containing polyisocyanate-polyaddition products

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958107U (ja) * 1982-10-12 1984-04-16 オ−ツタイヤ株式会社 免震構造体
JP2580498B2 (ja) * 1994-12-01 1997-02-12 株式会社カイモン 平面的に複合された複数のゴム支承体を有する橋梁弾性支承装置
DE19543519A1 (de) * 1995-11-22 1997-05-28 Ibg Monforts Gmbh & Co Kalottenlager
DE19953240A1 (de) 1999-11-04 2001-05-10 Basf Ag Verbundelemente
CN102094387B (zh) * 2010-12-30 2012-07-25 上海市城市建设设计研究院 一种桥梁支座垫块
CN116986205B (zh) * 2023-08-30 2024-05-28 安徽尚德科技有限公司 一种钢板橡胶支座生产用叠装装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1795263U (de) * 1958-12-02 1959-09-10 Gomma Antivibranti Applic Stuetze aus gummi fuer bruecken.
FR84050E (fr) * 1963-07-23 1964-11-13 Gomma Antivibranti Applic Appui en caoutchouc pour ponts
FR1391620A (fr) * 1964-05-05 1965-03-05 Gomma Antivibranti Applic Dispositif d'appui élastique, plus particulièrement destiné aux constructions en ciment armé précontraint
CH444582A (de) * 1964-05-28 1967-09-30 F I P Forniture Ind Padova Soc Elastisches Auflager für Bauwerkteile
GB1046537A (en) * 1964-06-30 1966-10-26 Andre Rubber Co Improvements in or relating to resilient bearers for structures or machinery
DE2024386A1 (de) * 1970-05-19 1971-12-02 Silent Channel Products Ltd., Huntingdon, Huntingdonshire (Großbritannien) Brückenlager

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107933A1 (en) * 1982-10-01 1984-05-09 Dixon International Limited Structural slide bearings
US6770374B1 (en) 1998-06-05 2004-08-03 Basf Aktiengesellschaft Composite elements containing compact polyisocyanate polyaddition products
US6790537B1 (en) 1999-03-30 2004-09-14 Basf Aktiengesellschaft Composite elements containing polyisocyanate-polyaddition products

Also Published As

Publication number Publication date
ZA804283B (en) 1981-07-29
AU6048180A (en) 1981-01-22
JPS5620207A (en) 1981-02-25
EP0022665A1 (en) 1981-01-21
GB2054092B (en) 1983-04-07
GB2054092A (en) 1981-02-11
ATE18079T1 (de) 1986-03-15
AU543027B2 (en) 1985-03-28
DE3071429D1 (en) 1986-03-27

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