EP0443988B1 - Load dissipating and limiting element - Google Patents

Load dissipating and limiting element Download PDF

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Publication number
EP0443988B1
EP0443988B1 EP91830012A EP91830012A EP0443988B1 EP 0443988 B1 EP0443988 B1 EP 0443988B1 EP 91830012 A EP91830012 A EP 91830012A EP 91830012 A EP91830012 A EP 91830012A EP 0443988 B1 EP0443988 B1 EP 0443988B1
Authority
EP
European Patent Office
Prior art keywords
antiseismic
load dissipating
limiting element
dissipating
load
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
EP91830012A
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German (de)
English (en)
French (fr)
Other versions
EP0443988A1 (en
Inventor
Renzo Medeot
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.)
FIP Industriale SpA
Original Assignee
FIP Industriale SpA
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 FIP Industriale SpA filed Critical FIP Industriale SpA
Priority to AT91830012T priority Critical patent/ATE92571T1/de
Publication of EP0443988A1 publication Critical patent/EP0443988A1/en
Application granted granted Critical
Publication of EP0443988B1 publication Critical patent/EP0443988B1/en
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
    • E01D19/04—Bearings; Hinges

Definitions

  • the present invention relates to a load dissipating and limiting element, which has been specifically designed for antiseismic devices and apparatus for bridges, viaducts, buildings and the like.
  • the pivot pins restrained in the cylindric portion, are deformed so as to be bent according to a given curvature, under the action of seismic forces applied to the ball shaped portion.
  • pivot pins allow only rather limited sliding movement to occur, which drawback can be at least partially removed by using the arrangements shown in figures 3, 4 and 5, by diagrams which are statically and dynamically equivalent.
  • the document IT-A-19538/86 discloses a load dissipating and limiting element for antiseismic devices having the features of the pre-characterizing portion of claim 1.
  • the aim of the present invention is to solve the above mentioned problem by providing a dissipating element which, owing to its specifically designed construction, affords the possibility of overcoming all of the difficulties associated with the mentioned limited sliding movements.
  • resilient restraining means which define a swinging element system, practically operating has a spring for the construction mass which has a proper resonance frequency which can be displaced away from the characteristic frequencies of the seismic events so as to greatly reduce the involved forces.
  • these elastic-plastic performance devices allow the possibility of reducing as well as controlling the maximum inertia forces transmitted by the restrained masses (such as a viaduct mass) to the supporting constructions (for example the pile and shoulder construction), with self-evident advantages in the case of a high intensity seismic event.
  • a main object of the present invention is to provide a load dissipating and liming element which can be directly associated with the supporting structures and which allows to easily make antiseismic devices, differentiated from the supporting structures or apparatus, and adapted to provide an efficient restraining system exclusively on a horizontal plane.
  • Another object of the present invention is to provide such a load dissipating and limiting element which is very simple construction-wise and can be easily made and assembled with a comparatively reduced cost.
  • the load dissipating and limiting element which has been particularly designed for antiseismic devices and apparatus for bridges, viaducts, buildings and the like according to the invention, comprises an elongated body, overally indicated at the reference number 1, which, advantageously, is made of a steel material having a high ultimate elongation characteristic (elongation at rupture).
  • the body 1 is provided with restraining elements which, preferably though not necessarily, comprise cylindric portions 2.
  • each load dissipating and limiting element which will be more simply called “spindle” is provided with a double tapering region 3 converging from the ends toward the central portion thereof.
  • Each spindle will be designed so as to provide the desired displacements and reactions, and its shape is so designed as to use, under plastic deformations, the main portions of the material forming the stem thereof, that is the tapering region thereof, so as to provide the desired ductile performance.
  • spindles are restrained by means of the end restraining elements 2 to the elements or plates 10 of the antiseismic devices or supporting constructions subjected to a relative displacements during the seismic event.
  • One of the two restraining elements can be withdrawn in order to allow the above mentioned relative displacements of the plates, without causing the spindle stem to be elongated.
  • the cross-sectional shape of the stem can be circular, in which case an isotropic performance will be obtained with respect to the displacements and reactions, or any desired shapes (for example an elliptical shape) in which case it will be obtained an anisotropic type of performance, while preserving the important features of a multi-directional characteristic.
  • Figures 9 and 10 show an antiseismic device made by using the above disclosed spindles, and comprising two end plates 10 restraining said spindles.
  • the bottom plate is anchored to the understructure by means of restraining elements 11, whereas the top plate is coupled to the overstructure through a cup element 12 in turn anchored by restraining elements 13.
  • the top and bottom hinges will rotate, by symmetry, for the same amount, under the effect of the displacements of the two end plates; likewise, the load dissipating and limiting element according to the invention provides the same effect since it is adapted to increase the mutual displacements, the length being the same, with respect to the pins and with the same stiffness of the system.
  • the device according to the present invention can be also provided with other means, such as set-breakage small keys, in order to remove from the characteristic curve the resilient portion, as well as with plungers or other hydraulic means for absorbing the slow movement (for example due to thermal effects) without stressing the spindles.
  • other means such as set-breakage small keys, in order to remove from the characteristic curve the resilient portion, as well as with plungers or other hydraulic means for absorbing the slow movement (for example due to thermal effects) without stressing the spindles.
  • the spindle elements according to the present invention can be applied to any supporting apparatus (for example made of neoprene, steel, polytetrafluoroethylene and so on) in a like way to that shown in the above mentioned patent applications IT-A-19538/86 and 19539/86.
  • any supporting apparatus for example made of neoprene, steel, polytetrafluoroethylene and so on

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Road Paving Structures (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Liquid Crystal Substances (AREA)
  • Materials For Medical Uses (AREA)
  • Springs (AREA)
EP91830012A 1990-02-20 1991-01-18 Load dissipating and limiting element Expired - Lifetime EP0443988B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91830012T ATE92571T1 (de) 1990-02-20 1991-01-18 Lastdissipations- und begrenzungselement.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1941390 1990-02-20
IT19413A IT1239224B (it) 1990-02-20 1990-02-20 Elemento dissipatore e limitatore di carico, particolarmente studiato per dispositivi antisismici ed apparecchi di appoggio antisismici per ponti, viadotti, edifici e simili.

Publications (2)

Publication Number Publication Date
EP0443988A1 EP0443988A1 (en) 1991-08-28
EP0443988B1 true EP0443988B1 (en) 1993-08-04

Family

ID=11157607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91830012A Expired - Lifetime EP0443988B1 (en) 1990-02-20 1991-01-18 Load dissipating and limiting element

Country Status (5)

Country Link
EP (1) EP0443988B1 (it)
AT (1) ATE92571T1 (it)
DE (1) DE69100215T2 (it)
ES (1) ES2044714T3 (it)
IT (1) IT1239224B (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5490356A (en) * 1993-11-24 1996-02-13 Mm Systems Of Arizona Seismic isolation bearing
FR2766853B1 (fr) * 1997-08-04 1999-10-08 Brigitte Baur Dispositif antivibratoire pour batiment
ATE303489T1 (de) 1999-02-26 2005-09-15 Vinci Construction Grands Proj Gelenkige paraseismische elastoplastische vorrichtung für hoch- und tiefbau und brücke mit einer derartigen vorrichtung
IT1399760B1 (it) * 2010-05-03 2013-05-03 Alga Spa Dispositivo antisismico isteretico
CN103498414B (zh) * 2013-10-08 2016-06-01 衡水中铁建工程橡胶有限责任公司 一种金属阻尼减隔震支座
CN103510464B (zh) * 2013-10-28 2015-09-09 中铁第一勘察设计院集团有限公司 同球向双球面减隔震支座
CN104652252A (zh) * 2015-02-12 2015-05-27 中铁二院工程集团有限责任公司 桥梁减震卡榫装置
CN107151976A (zh) * 2017-06-16 2017-09-12 北京交达铁工科技有限公司 分离式榫组件、弹塑性防落梁限位装置及其安装方法
IT202200006830A1 (it) * 2022-04-06 2023-10-06 Fip Mec S R L Appoggio strutturale fisso cedevole

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63219928A (ja) * 1987-03-06 1988-09-13 Kajima Corp 弾塑性ダンパ−

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ178949A (en) * 1975-10-14 1979-04-26 New Zealand Dev Finance Energy absorber for eg bouldings:cyclicylly deformable body in shear
DE3047762A1 (de) * 1980-12-15 1982-07-15 Gerb Gesellschaft für Isolierung mbH & Co KG, 1000 Berlin "schwingungsisolierung zur erdbebensicherung"
US4731966A (en) * 1985-06-19 1988-03-22 Takafumi Fujita Vibration energy absorber device
US4901486A (en) * 1987-03-06 1990-02-20 Kajima Corporation Elasto-plastic damper

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63219928A (ja) * 1987-03-06 1988-09-13 Kajima Corp 弾塑性ダンパ−

Also Published As

Publication number Publication date
IT9019413A0 (it) 1990-02-20
IT1239224B (it) 1993-09-28
EP0443988A1 (en) 1991-08-28
DE69100215D1 (de) 1993-09-09
ES2044714T3 (es) 1994-01-01
DE69100215T2 (de) 1993-11-18
IT9019413A1 (it) 1991-08-21
ATE92571T1 (de) 1993-08-15

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