EP0694652B1 - Perfectionnements aux dispositifs de transmission d'efforts pour ouvrages de génie civil - Google Patents

Perfectionnements aux dispositifs de transmission d'efforts pour ouvrages de génie civil Download PDF

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Publication number
EP0694652B1
EP0694652B1 EP95401771A EP95401771A EP0694652B1 EP 0694652 B1 EP0694652 B1 EP 0694652B1 EP 95401771 A EP95401771 A EP 95401771A EP 95401771 A EP95401771 A EP 95401771A EP 0694652 B1 EP0694652 B1 EP 0694652B1
Authority
EP
European Patent Office
Prior art keywords
bar
piston
perforated
axially
rigid
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
EP95401771A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0694652A1 (fr
Inventor
Carlos De La Fuente
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.)
Freyssinet International STUP SA
Original Assignee
Freyssinet International STUP SA
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 International STUP SA filed Critical Freyssinet International STUP SA
Publication of EP0694652A1 publication Critical patent/EP0694652A1/fr
Application granted granted Critical
Publication of EP0694652B1 publication Critical patent/EP0694652B1/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
    • 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

  • the present invention relates to devices for transmission of forces for civil engineering works.
  • the bar which is intended to be attached to the first part of the work is generally directly attached to the piston, while the assembly of reception which is intended to be attached to the second part of work is generally constituted by the cylindrical pot in which the piston slides.
  • the object of the present invention is in particular to propose a force transmission device of the kind simple, inexpensive and reliable.
  • a device for effort transmission of the genre in question is essentially characterized in that the receiving assembly has an anchor block which is pierced with a passage center crossed by the bar, this central passage presenting two axial ends in the vicinity of which the central passage forms two divergent frustoconical housings towards the outside of said central passage, a bit frustoconical anchor being disposed in each housing tapered to be able to anchor the bar respectively in two opposite directions, two rigid openwork stops being arranged respectively on either side of the block anchoring, these perforated stops being freely traversed by the bar and joined together so as to form an axially floating equipment, means being provided to ensure normal axial positioning in normal times of this crew relative to the jaws, corresponding to the times at the axial juxtaposition of the openwork stops against the jaws and a freedom of sliding of the bar in these jaws in both directions, said crew being secured with one of the two elements constituted by the pot cylindrical and by the piston and the bar being secured with the other element.
  • the rigid bar can move freely slowly in the receiving assembly, the piston undergoing then corresponding displacements inside of its cylindrical pot without generating significant effort on the openwork stops, due to the slowness of the movement.
  • the axial forces exerted on the bar rigid are taken up by the frustoconical anchoring jaws and the associated restraint system, according to a proven technique, simple, efficient and reliable.
  • the set or sets of cylindrical pots and pistons do not take up significant effort, but serve only to wedge one of the frustoconical anchoring jaws during the application of an abrupt axial force on the rigid bar: these sets of cylindrical pots and pistons can therefore be sized to withstand relatively small efforts compared to the total effort that the force transmission device must resume, so these sets of cylindrical pots and pistons can be relatively simple and inexpensive.
  • the force transmission device aims to connect horizontally between them two parts of a civil engineering structure, such as two successive spans 1, 2 of the bridge deck 3, the force transmission device then being arranged at the joint between the two spans 1, 2, above one of the piers 3a of the bridge.
  • the force transmission device according to the invention can also be placed between one of the spans of the deck of bridge 3 and one of the abutments of this bridge, or between a span 2 of the bridge deck and a pylon when the bridge is of the guyed type.
  • the invention is however not limited to the transmission of forces between successive spans or between bridge spans and abutments, but applies on the contrary generally to the horizontal connections between two parts of a civil engineering structure which are susceptible to undergo relative movements.
  • the force transmission device comprises a rigid rectilinear bar 4 which, in the example in Figure 1, is intended to be fixed to bay 1 of the bridge deck.
  • This bar 4 slides in a rigid receiving assembly 5 which, in the example of the Figure 1, is intended to be fixed to the span 2 of the deck bridge and is partially arranged in a recess 2a of said span 2.
  • Bar 4 can be made of steel, and it may have a circular section having a diameter which can range for example from 30 mm to 150 mm or more, following the efforts it may have to resume.
  • This bar 4 extends along a horizontal axis 4a between a front end 4b threaded and an end rear 4c which is arranged inside the assembly reception 5.
  • the threaded front end 4b of the bar 4 receives a fastening part 4d fixed to a complementary member 1b secured to span 1 of the bridge deck, the fixing between these two parts which may consist in particular in an articulation around an axis 4f perpendicular to bar 4.
  • the reception assembly 5 in which slides the bar 4 has a plate of rigid fixing 6 fixed to span 2 of the bridge deck.
  • span 2 of the bridge deck is hollow, as in the example shown, the fixing of the plate 6 on span 2 can be obtained by means of prestressed 6a, which cross the plate 6 as well as the wall of span 2 of the deck, these prestressing bars 6a receiving at each of their ends nuts 6b which allow the plate 6 to be tightened against the span 2 of the bridge deck.
  • Plate 6 is pierced with a circular central hole threaded into which a first block is screwed anchor 7 rigid externally threaded.
  • the first anchor block 7 is pierced with a passage central crossed by bar 4, this central passage having a cylindrical part 7b towards its end front and a tapered housing 7a towards its end rear, which frustoconical housing diverges towards the rear.
  • a first frustoconical anchoring jaw 9 similar to the jaws usually used for cable anchoring or prestressing bars, this anchoring jaw being constituted of several angularly distributed rigid keys around the bar 4.
  • the frustoconical anchoring jaw 9 makes protruding rearwards out of the housing 7a.
  • This frustoconical jaw 9 is susceptible, in conditions which will be explained below, to anchor the bar 4 to anchor block 7 preventing by wedge effect said bar to move forward.
  • the reception assembly 5 also includes a second anchor block 8 which is attached to the first block 7 and which is fixed to it by screws (not shown).
  • the second anchor block 8 has a central passage arranged in the extension of the central passage of the first block 7, the central passage of the second block 8 having a cylindrical part 8b disposed opposite the part cylindrical 7b of the first anchor block 7, and a housing frustoconical 8a disposed at the front end of the second anchor block 8 and diverging forward.
  • a second identical frustoconical anchoring jaw 10 the first is arranged in the frustoconical housing 8a of the second anchor block and protrudes forward outside the housing 8a, this second frustoconical anchoring jaw being likely to anchor the bar 4 to prevent it to move backwards.
  • Two rigid stop rings 15, 16 are arranged respectively at the rear end of the first anchor block 7 and at the front end of the second block Anchor 8. A certain axial clearance is provided between the anchor blocks and thrust rings.
  • stop rings 15, 16 are crossed freely by bar 4, and they are connected between them by rigid rods 17 parallel to the bar 4 which slide axially in the first and second blocks anchor 7, 8, the rods 17 now a distance constant axial between the two abutment rings 15, 16.
  • the rods 17 are two in number and symmetrically arranged by compared to bar 4.
  • a metal helical spring 11 or similar, which surrounds the bar 4, is further arranged axially between the first and second frustoconical anchoring jaws 9, 10, so as to stress the two jaws respectively anchor, each against one of the stop rings.
  • Each rod 17 is fixed to a piston rod 18 rigid which is parallel to the bar 4 and which extends towards the rear beyond the rear end 4c of said bar 4.
  • each piston rod 18 is integral with a piston 19 which slides in a sealed cylindrical pot 20, separating this cylindrical pot in two separate compartments 20a, 20b by a throttled passage 24 formed between the piston and the side wall of the cylindrical pot.
  • the two compartments 20a, 20b of each pot cylindrical 20 and the throttled passage 24 are filled with a pasty material 23, plastic or oily, the volume of which global is invariable, and which is slowly deformable by to make slow piston movements possible 19 in pot 20, by means of a very small delivery velocity of pasty material through the choked passage 24, the rapid movements of said material in the constriction however, being impossible.
  • each cylindrical pot 20 is constituted by a cylindrical sleeve 26 at both ends of which are screwed two bottoms 27, 28 crossed by the piston rod 18, an annular seal 29 being provided for sealing between each bottom 27, 28 and the piston rod 18.
  • the bottom 27 of the cylindrical pot is screwed or fixed otherwise in a bore of a plate 21 which is fixed, for example by means of a screw 22, at the rear end 4c from bar 4.
  • Two rigid cylindrical tubes 12, 13, made in solid sheet metal, are screwed onto the first anchor block 7 on either side of the fixing plate 6, each of these rigid tubes supporting a guide ring, respectively 14a, 14b, which is crossed by the bar 4 and which guides this bar in axial sliding.
  • the guide rings 14a, 14b are arranged axially on either side of the stop rings 15, 16.
  • the guide ring 14b represents the end front of the receiving assembly 5, and it is made up preferably by a solid plate pierced only with a orifice to receive the bar 4. The ring 14b prevents thus any foreign body penetration in the whole 5, and any interference between the crown stop 16 and an external element.
  • the guide ring 14a for its part, is disposed behind the thrust ring 15, and it is also in the form of a solid plate pierced only with a hole for the passage of the bar 4 and orifices for the passage of the piston rods 18.
  • a rigid protective cover 25 is fixed at the rear end of the tube 12, for example by screwing, this protective cover having a side wall cylindrical full and a bottom also full, so to protect sets of pistons and cylindrical pots 19, 20 and the piston rods 18.
  • the sets of cylindrical pots and pistons 19, 20 can optionally be three or more, and be distributed angularly around the bar 4, the rods 17 and 18 being in same number as the sets of cylindrical pots and pistons.
  • the force transmission device operates as follows.
  • anchor jaws 9 and 10 do not block the bar 4 and it slides slowly in the receiving assembly 5.
  • Bar 4 therefore slides freely throughout reception 5, on a total stroke which can go, depending on the case, for example from 100 to 1000 mm and can be worth about 200 mm in a particular case.
  • the bar 4 is therefore immediately secured to the reception assembly 5, and this very effectively.
  • the axial tensile or compressive force which can be picked up by the transmission device efforts according to the invention can range for example from a few tens to a few hundred tonnes, and can worth around 150 tonnes in a particular case.
  • the force transmission device according to the invention does not necessarily directly link one to the other the two parts of the work considered: it is possible indeed to provide a damper between the force transmission device according to the invention and one or the other of the two parts of the work.
  • the front end of the bar 4 can be fixed to a end of a shock absorber 30, the other end of which is attached to one of the two parts of the work to be joined, by example a bridge la abutment 3, the reception assembly 5 then being fixed to a span 2 of the bridge deck.
  • the damper 30 in question can for example be a corrugated metal piece that absorbs energy by plasticization of the metal in case of relative displacement violent between the two parts of the work, for example during an earthquake.
  • anchor blocks 7, 8 of the example just described could be possibly made in one piece, and that the first block, or possibly both blocks, could be formed in one piece with the plate 6.
  • the first arrangement considerably reduces the overall length of the transmission device effort by placing the cylindrical pots either in the axial extension of the central bar, but around this bar.
  • the pots 20 can then serve themselves rigid spacers connecting the stops together openwork 15, 16 (we speak here rather of "openwork stops” as “thrust crowns” to designate said parts 15 and 16, because they are no longer of revolution here).
  • the guide rings 14a and 14b of the bar 4 are mounted on the anchor block 8 using screws 31 through rigid spacer sleeves 32 which freely pass through the perforated stops 15 and 16.
  • Each member 36 includes a compression spring 36a (for example a stack of Belleville washers) mounted around the outer portion of a screw 36b screwed in block 8 and freely crossing one of the two stops openwork 15, 16, said outer portion being included between said stop and the enlarged head 36c of the screw.
  • a compression spring 36a for example a stack of Belleville washers
  • the springs 36 are calibrated so that the floating crew is normally in a position mean axial for which the different parts 35, 9, 10, 15 and 16 are juxtaposed axially, one against the other, but without there being any wedging between a jaw and the bar, vis-à-vis relatively slow movements of this bar in these bit.
  • the immobilizer relative of the pistons 19 in the pots 20 has the effect of instantly secure the floating crew with said bar and therefore to stress axially one of the two jaws 9 and 10 when sinking into its frustoconical housing, this which ensures an immediate blocking of the bar relative to the block 8 and therefore an immediate joining of the part structure 1 with structure part 33.
  • the above force transmission device described is coupled to a second identical device, and these two devices equip a flat support for civil engineering structure, support comprising two portions superimposed along a horizontal sliding face.
  • these two portions constitute the two parts of work 1 and 2 (or 33) above and the two devices are placed, in parallel one to the other, on each side of the support.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Vibration Dampers (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
EP95401771A 1994-07-29 1995-07-26 Perfectionnements aux dispositifs de transmission d'efforts pour ouvrages de génie civil Expired - Lifetime EP0694652B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9409470A FR2723111B1 (fr) 1994-07-29 1994-07-29 Perfectionnements aux dispositifs de transmission d'efforts pour ouvrages de genie civil
FR9409470 1994-07-29

Publications (2)

Publication Number Publication Date
EP0694652A1 EP0694652A1 (fr) 1996-01-31
EP0694652B1 true EP0694652B1 (fr) 1998-09-02

Family

ID=9465919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401771A Expired - Lifetime EP0694652B1 (fr) 1994-07-29 1995-07-26 Perfectionnements aux dispositifs de transmission d'efforts pour ouvrages de génie civil

Country Status (5)

Country Link
EP (1) EP0694652B1 (enrdf_load_stackoverflow)
KR (1) KR100371695B1 (enrdf_load_stackoverflow)
ES (1) ES2121311T3 (enrdf_load_stackoverflow)
FR (1) FR2723111B1 (enrdf_load_stackoverflow)
TW (1) TW289777B (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1031680B1 (fr) * 1999-02-26 2005-08-31 Vinci Construction Grands Projets Dispositif parasismique élastoplastique articulé pour ouvrage de génie civil, et ouvrage d'art tel qu'un pont comportant ledit dispositif
KR100476439B1 (ko) * 2002-03-12 2005-03-16 박대원 건축 구조물용 내진장치
CN102304893B (zh) * 2011-07-01 2013-08-21 株洲时代新材料科技股份有限公司 一种活塞式桥梁缓冲保护方法及装置和制作方法
ITMI20111607A1 (it) * 2011-09-07 2013-03-08 Alga Spa Supporto rigido collassabile per strutture edilizie e simili
CN115613448A (zh) * 2022-10-17 2023-01-17 左权县交通运输局 一种桥梁支座的伸缩式锚固装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544432B1 (fr) * 1982-11-09 1985-11-29 Dragages Travaux Publics Verin parasismique pour structure elastiquement appuyee
FR2549114A1 (fr) * 1983-07-13 1985-01-18 Vibrachoc Sa Dispositif d'absorption d'energie, notamment pour ponts

Also Published As

Publication number Publication date
EP0694652A1 (fr) 1996-01-31
FR2723111B1 (fr) 1996-10-18
ES2121311T3 (es) 1998-11-16
KR100371695B1 (ko) 2003-04-21
FR2723111A1 (fr) 1996-02-02
TW289777B (enrdf_load_stackoverflow) 1996-11-01

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