EP0519048A1 - A constraint device for parts of viaducts and the like - Google Patents

A constraint device for parts of viaducts and the like

Info

Publication number
EP0519048A1
EP0519048A1 EP92903409A EP92903409A EP0519048A1 EP 0519048 A1 EP0519048 A1 EP 0519048A1 EP 92903409 A EP92903409 A EP 92903409A EP 92903409 A EP92903409 A EP 92903409A EP 0519048 A1 EP0519048 A1 EP 0519048A1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
constraint device
throttle
compartment
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.)
Withdrawn
Application number
EP92903409A
Other languages
German (de)
English (en)
French (fr)
Inventor
Roberto Marnetto
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.)
SILAR Srl
Original Assignee
SILAR Srl
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 SILAR Srl filed Critical SILAR Srl
Publication of EP0519048A1 publication Critical patent/EP0519048A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • E01D19/06—Arrangement, construction or bridging of expansion joints
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/0235—Anti-seismic devices with hydraulic or pneumatic damping

Definitions

  • This invention relates to a constraint device * according to the preamble of the main Claim.
  • Appropriate devices are in use, e.g. such as a cylinder-piston unit which makes a viscous fluid, oil in general, flow through a conduit provided with a throttle.
  • the cylinder-piston units currently employed for the purpose are symmetrical double-acting, oil-operated cylinders wherein a certain amount of oil is alternately transferred from one working chamber to the other through a throttled line.
  • the underlying problem of this invention is to provide a device as specified above, which has such constructional and operational features as to overcome the above-mentioned drawback.
  • a device 1 according to the invention comprises a cylinder-piston unit 2 having an axis X-X and being filled with a viscous fluid, usually an oil.
  • the cylinder-piston unit 2 includes a cylinder
  • a piston 7 can slide, in sealed relationship by virtue of a seal 6, inside the cylinder 3.
  • the piston 7 has a single piston rod 7a being slidable through the head 4 in sealed relationship by virtue of a seal 8 provided.
  • the piston rod 7a is terminated with a free end 9 which carries a threaded boss 10.
  • a bracket 11 Attached to the threaded boss 10 is a bracket 11 which is associated with a part 12 of a viaduct, e.g. a girder member thereof.
  • the head 5 has a central portion 13 whence a threaded boss 14 extends outwards. Attached to the threaded boss 14 is a bracket 15 associated with another part 16 of the viaduct, such as a girder thereof adjoining the former one.
  • a cylindrical lug 17 projects inwardly which is made rigid therewith, spans cantilever-fashion the full length of the cylinder 3, and has a free end 18.
  • the piston 7 and piston rqd 7a have a cylindrical recess 18 whereby they fit over the lug 17 to slide therealong in sealed relationship by virtue of a seal 20.
  • the lug 17 has a cylindrical recess 21 which is open at the free end 18.
  • a plunger 23 can slide inside the recess 21 in sealed relationship by virtue of a seal 22 provided.
  • the piston 7 defines two oppositely located chambers 24 and 25 with different cross-sectioal areas inside the cylinder 3: a chamber 24 of small cross-section, which locates on the piston rod 7a side, and a large cross-section chamber 25.
  • the difference between the chamber cross-sections is a small one, it being equal to the difference of the piston rod cross-section minus the cross-section of the cylindrical recess 19.
  • a conduit 26 extends through the piston 7 across the seal 6 to put the chambers 24 and 25 in fluid communication with each other.
  • a throttle 27 is arranged on the conduit 26.
  • the plunger 23 defines two oppositely located compartments 28 and 29 within the recesses 19 and 21: a compartment 28 located on the side of the piston rod end 9 and a compartment 29 located on the head 5 side.
  • the compartment 28 is intended to contain a
  • a filler 30 is provided on the end 9 of the piston rod 7a and has a respective closure cap 31.
  • the compartment 29 is in fluid communication with the chamber 25 through a passageway 32 along which a throttle 33 is arranged.
  • compartment 28 and compartment 29 provides in practice a gas accumulator, generally indicated at 34, which is formed in the piston 7 of the cylinder-piston unit 2 and communicates to a chamber 25 of the cylinder-piston unit.
  • the oil is allowed to expand unrestrictedly under heat without this entailing any significant increase in the internal pressure of the cylinder-piston unit.
  • the device of this invention has shown to be unaffected by temperature changes and quite free of unwanted oil leakouts, thereby performing in a fully reliable manner.
  • a further advantage of the device according to the invention is that it can be made uncommonly compact because of the provision therein of a single piston rod.
  • a non-negligible advantage is that it is a strong and rugged construction virtually invulnerable to collision shocks from heavy objects, such as may occur during the works emplacement and running.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Road Paving Structures (AREA)
EP92903409A 1991-01-07 1992-01-03 A constraint device for parts of viaducts and the like Withdrawn EP0519048A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI910013A IT1244516B (it) 1991-01-07 1991-01-07 Dispositivo di vincolo, per parti di viadotti e simili
ITMI91000 1991-01-07

Publications (1)

Publication Number Publication Date
EP0519048A1 true EP0519048A1 (en) 1992-12-23

Family

ID=11358015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92903409A Withdrawn EP0519048A1 (en) 1991-01-07 1992-01-03 A constraint device for parts of viaducts and the like

Country Status (3)

Country Link
EP (1) EP0519048A1 (it)
IT (1) IT1244516B (it)
WO (1) WO1992013158A2 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110387813A (zh) * 2019-07-27 2019-10-29 蓝海绿业生态建设股份有限公司 一种桥梁的伸缩缝结构及其施工方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743383B1 (fr) * 1996-01-09 1999-03-05 Freyssinet Int Stup Dispositif d'amortissement pour des elements d'une structure de genie civil
FR2743384B1 (fr) * 1996-01-09 1999-01-22 Freyssinet Int Stup Dispositif de liaison pour des elements d'une structure de genie civil
GB2318850A (en) * 1996-10-28 1998-05-06 Oleo International Limited Damper

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB493657A (en) * 1937-07-16 1938-10-12 Ribbesford Company Ltd Improvements in resilient struts for use more especially in connection with tanks and the like
FR2544432B1 (fr) * 1982-11-09 1985-11-29 Dragages Travaux Publics Verin parasismique pour structure elastiquement appuyee
US4587773A (en) * 1983-01-13 1986-05-13 Valencia Hector A Seismic protection systems
EP0318817A3 (de) * 1987-11-28 1990-05-30 Hermann Hemscheidt Maschinenfabrik GmbH & Co. Hydro-pneumatischer Stoss- und Schwingungsdämpfer mit Innenrohr

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9213158A2 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110387813A (zh) * 2019-07-27 2019-10-29 蓝海绿业生态建设股份有限公司 一种桥梁的伸缩缝结构及其施工方法
CN110387813B (zh) * 2019-07-27 2021-06-08 蓝海绿业生态建设股份有限公司 一种桥梁的伸缩缝结构及其施工方法

Also Published As

Publication number Publication date
IT1244516B (it) 1994-07-15
WO1992013158A2 (en) 1992-08-06
ITMI910013A1 (it) 1992-07-07
ITMI910013A0 (it) 1991-01-07
WO1992013158A3 (en) 1992-09-17

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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

17P Request for examination filed

Effective date: 19920819

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE

17Q First examination report despatched

Effective date: 19940223

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19940906