EP2198099A1 - Sliding pendulum seismic isolator - Google Patents

Sliding pendulum seismic isolator

Info

Publication number
EP2198099A1
EP2198099A1 EP07827678A EP07827678A EP2198099A1 EP 2198099 A1 EP2198099 A1 EP 2198099A1 EP 07827678 A EP07827678 A EP 07827678A EP 07827678 A EP07827678 A EP 07827678A EP 2198099 A1 EP2198099 A1 EP 2198099A1
Authority
EP
European Patent Office
Prior art keywords
sliding
elements
cylindrical
intermediate element
cylindrical concave
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.)
Granted
Application number
EP07827678A
Other languages
German (de)
French (fr)
Other versions
EP2198099B1 (en
Inventor
Agostino Marioni
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.)
ALGA SpA
Original Assignee
ALGA 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 ALGA SpA filed Critical ALGA SpA
Publication of EP2198099A1 publication Critical patent/EP2198099A1/en
Application granted granted Critical
Publication of EP2198099B1 publication Critical patent/EP2198099B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
    • 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

Definitions

  • the present invention relates to a sliding pendulum seismic isolator and particularly to a sliding pendulum seismic isolator of the bi-directional type.
  • the seismic isolation technique using sliding pendulum seismic isolators essentially comprising convex supports coupled with concave cylindrical sliding surfaces.
  • Such isolators are usually arranged between a superstructure such as, for example, a bridge or a building, and its foundations. In case of earthquakes, the isolators allow a movement and/or a rotation of the superstructure relative to the foundations, thus protecting its integrity.
  • the superstructure oscillates increasing and decreasing its potential energy according to the law of motion of a pendulum, whose natural period is defined by the radius of the cylindrical surface.
  • the radius of the cylindrical surfaces is designed in order to optimize the natural period of the pendulum for the reduction of the seismic response of the superstructure.
  • a certain amount of energy is dissipated through the friction between the contact material and the cylindrical surface, thus reducing more the seismic response of the superstructure.
  • seismic isolators comprising different types of isolator, such as, for example, multi-directional isolators and mono- and bi-directional isolators, which define a pattern of constraints between the structure and its foundations such to generate a series of programmed movements and/or rotations during an earthquake.
  • Patent application US 2006/0174555 in the name of Earthquake Protection Systems Inc. discloses a sliding pendulum seismic isolator provided with a lower sliding element and an upper sliding element between which two or three intermediate elements are arranged, provided with spherical surfaces defining a spherical joint.
  • the spherical joint allows the relative rotation and the movement of the lower part with respect to the upper part.
  • the spherical joint also allows to transfer the vertical compression loads and transverse loads occurring during a seismic event from the supported structure to the foundations.
  • the spherical joint of the seismic isolator described in the above-mentioned patent application may be applied to multi-directional supports as well as to mono- and bi-directional supports. Concerning bi-directional supports in particular, the above-mentioned patent application describes a very simple and inexpensive solution, wherein the lower sliding element and the upper one are designed as rails arranged along two directions of movement substantially perpendicular to each other.
  • the bi-directional sliding pendulum seismic isolator includes a rail-shaped lower sliding element and a rail-shaped upper sliding element that are substantially perpendicular to each other and have cylindrical concave surfaces opposite to each other. Between the lower and upper sliding elements a first and a second intermediate element are arranged, which slide along said cylindrical concave surfaces of the sliding elements by means of corresponding cylindrical convex surfaces.
  • the first intermediate element is provided with a cylindrical concave surface opposite to its cylindrical convex sliding surface and having the axis perpendicular to the axis of the cylindrical concave surface of the lower sliding element.
  • the second intermediate element is provided with a concave surface opposite to its cylindrical convex sliding surface and having the axis perpendicular to the axis of the cylindrical concave surface of the upper sliding element.
  • a third intermediate element is arranged, having a lower surface and an upper surface that are both cylindrical convex surfaces and have their axes perpendicular to each other.
  • the three intermediate elements constitute a joint having the shape of a cylindrical double saddle that allows the movement and the relative rotation between the rail-shaped sliding elements.
  • the main advantage of the isolator according to the present invention is that, thanks to the particular cylindrical double-saddle design, it is possible to dimension the joint arranged between the rail-shaped sliding elements in function of the actual load conditions as well as the movements and the rotations foreseen in the two sliding directions, thus avoiding a useless oversizing and above all optimizing the design solutions.
  • Another advantage of the isolator according to the present invention is that the manufacturing of the joint with cylindrical sliding surfaces is remarkably easier and cheaper than the manufacturing of spherical surfaces, thus being able to achieve sliding surfaces of optimum quality in a relatively easy way, both directly working metal surfaces of hard materials such as stainless steel and in the case of coverings with thin plates, which further contributes to the optimization of the isolator costs.
  • figure 1 shows a perspective view of a bi-directional sliding pendulum seismic isolator according to the present invention
  • figure 2 is a sectional view of the isolator of figurel along line II-II
  • - figure 3 is a detail III of figure 2
  • figure 4 is a sectional view of the isolator of figure 1 along line TV-IV
  • figure 5 is a detail V of figure 4
  • figure 6 is a perspective exploded view of the isolator of figure 1.
  • a bi-directional sliding pendulum seismic isolator conventionally includes a rail-shaped lower sliding element 1 and a rail-shaped upper sliding element 2 substantially perpendicular to each other.
  • Lower and upper sliding elements 1, 2 are respectively provided with a cylindrical concave sliding surface Ia facing upward and a cylindrical concave sliding surface 2a facing downward.
  • a first and a second intermediate element 3, 4 are arranged, each having a cylindrical convex sliding surface 3 a, 4a suitable to allow them to slide respectively along cylindrical concave surfaces Ia, 2a of lower and upper sliding elements 1, 2.
  • a third intermediate elements 5 is arranged between the first and second intermediate element 3, 4.
  • the first intermediate element 3 is provided with a cylindrical concave surface 3b opposite to its cylindrical convex sliding surface 3 a and having the axis perpendicular to the axis of the cylindrical concave surface Ia of the lower sliding element 1.
  • the second intermediate element 4 is provided with a cylindrical concave surface 4b opposite to its cylindrical convex sliding surface 4a and having the axis perpendicular to the axis of the cylindrical concave surface 2a of the upper sliding element 2.
  • the third intermediate element 5 has a lower surface 5a and an upper surface 5b that are both cylindrical convex surfaces and have their axes substantially perpendicular to each other.
  • the lower surface 5a and the upper surface 5b of the third intermediate element 5 are in contact with surfaces 3b, 4b of the first and second intermediate element 3, 4, respectively, and allow a relative rotation between the intermediate elements 3, 4.
  • elements 3, 4 and 5 constitute a joint having the shape of a cylindrical double saddle that allows relative rotations and movements of the lower and upper sliding elements 1, 2 in the two sliding directions defined by the isolator.
  • the curvature radiuses of the cylindrical surfaces may be different in the two sliding directions, in order to better fit the actual movements and rotations of the superstructure.
  • coupling means are provided between the lower and upper sliding elements 1, 2 and the intermediate elements 3, 4 and 5 in the transverse direction.
  • Such coupling means are, for example, lateral guides formed on the sliding elements 1, 2 and on the intermediate elements 3, 4, 5 and arranged along the movement direction allowed by the single coupling.
  • the first sliding element 1 is provided with guides Ib, Ic along its sides suitable for retaining the first intermediate element 3 in the transverse direction.
  • the transverse constraint between the upper sliding element 2 and the second intermediate element 4 is made up of a pair of guides 4c, 4d fixed on the second intermediate element 4 itself.
  • the third intermediate element 5 is constrained to the first and second intermediate element 3, 4 by means of guides 3c, 3d and 4e, 4f respectively formed thereon.
  • the sliding surfaces Ia, 3a; 2a, 4a; 3b, 5a; 4b, 5b are covered with plates made of controlled friction materials that are combined between them so as to minimize the wear.
  • Controlled friction materials suitable for the application to isolators are, for instance, stainless steel and polymeric materials chosen among, for example, polyethylene, polyamidic resins and PTFE suitably modified and/or filled.
  • the cylindrical concave surfaces Ia, 2a of the lower and upper sliding elements 1, 2 are covered with mirror polished stainless steel plates S and the cylindrical convex surfaces 3 a, 4a of the first and second intermediate element 3, 4 are covered with plates T made of polyethylene.
  • the third intermediate element 5 is entirely made of stainless steel with the cylindrical convex surfaces 5 a, 5b being mirror polished and slidable on polyethylene plates T that are respectively arranged in suitable seats formed in the cylindrical concave surfaces 3b, 4b of the first and second intermediate element 3, 4.
  • the isolator according to the present invention also preferably comprises a plurality of anchoring elements 6, for example metal plates having a central hole, arranged at the base of the lower and upper sliding elements 1, 2 at their ends.
  • Anchoring elements 6 serve to fix the lower and upper sliding elements 1, 2 to the superstructure and to its foundations by using, for instance, screws 7 engaging the threaded holes of anchor bars 8 buried in concrete.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Insulators (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

A bi-directional sliding pendulum seismic isolator comprises a rail-shaped lower sliding element (1) and a rail-shaped upper sliding element (2) substantially perpendicular to each other and having opposite cylindrical concave surfaces (Ia, 2a). Between the sliding elements (1, 2) a first and a second intermediate element (3, 4) are arranged, each provided with a cylindrical convex sliding surface (3a, 4a) allowing it to slide along the cylindrical concave surface (Ia, 2a) of the lower and upper sliding elements (1, 2). Each of the first and the second intermediate element (3, 4) is provided with a cylindrical concave surface (3b, 4b) opposite to its sliding surface (3a, 4a), and between them a third intermediate element (5) is arranged, provided with a lower and an upper surface (5a, 5b) that are both cylindrical convex surfaces and have their axes perpendicular to each other. The intermediate elements (3, 4, 5) constitute a joint having the shape of a cylindrical double saddle that allows the movement and the relative rotation between the rail-shaped sliding elements (1, 2) and allows to dimension the joint in function of the actual load conditions and rotations in the two sliding directions of the isolator, thus avoiding a useless oversizing and optimizing the design solutions and the manufacturing costs.

Description

SLIDING PENDULUM SEISMIC ISOLATOR
The present invention relates to a sliding pendulum seismic isolator and particularly to a sliding pendulum seismic isolator of the bi-directional type. There is known the seismic isolation technique using sliding pendulum seismic isolators essentially comprising convex supports coupled with concave cylindrical sliding surfaces. Such isolators are usually arranged between a superstructure such as, for example, a bridge or a building, and its foundations. In case of earthquakes, the isolators allow a movement and/or a rotation of the superstructure relative to the foundations, thus protecting its integrity.
As an effect of the sliding movement of the convex supports on the cylindrical surfaces, the superstructure oscillates increasing and decreasing its potential energy according to the law of motion of a pendulum, whose natural period is defined by the radius of the cylindrical surface. The radius of the cylindrical surfaces is designed in order to optimize the natural period of the pendulum for the reduction of the seismic response of the superstructure. Moreover, a certain amount of energy is dissipated through the friction between the contact material and the cylindrical surface, thus reducing more the seismic response of the superstructure.
In order to isolate a superstructure sets of seismic isolators are generally used, comprising different types of isolator, such as, for example, multi-directional isolators and mono- and bi-directional isolators, which define a pattern of constraints between the structure and its foundations such to generate a series of programmed movements and/or rotations during an earthquake.
Patent application US 2006/0174555 in the name of Earthquake Protection Systems Inc. discloses a sliding pendulum seismic isolator provided with a lower sliding element and an upper sliding element between which two or three intermediate elements are arranged, provided with spherical surfaces defining a spherical joint. During an earthquake, the spherical joint allows the relative rotation and the movement of the lower part with respect to the upper part. The spherical joint also allows to transfer the vertical compression loads and transverse loads occurring during a seismic event from the supported structure to the foundations. The spherical joint of the seismic isolator described in the above-mentioned patent application may be applied to multi-directional supports as well as to mono- and bi-directional supports. Concerning bi-directional supports in particular, the above-mentioned patent application describes a very simple and inexpensive solution, wherein the lower sliding element and the upper one are designed as rails arranged along two directions of movement substantially perpendicular to each other.
A problem of seismic isolators based on spherical joints, and particularly of those of the bi-directional type, is that such spherical joints must necessarily be dimensioned on the basis of the loading conditions of the most stressed direction and therefore they are unnecessarily oversized with respect to the less stressed direction, resulting in a consequent increase in the manufacturing costs.
Moreover, the manufacturing of spherical surfaces is rather complex and expensive both due to the geometry and to the hardness of the materials employed such as, for instance, stainless steel. In case the sliding surfaces of the spherical joints are manufactured by superimposing thin stainless steel plates to a base structure, it is very difficult to obtain spherical caps of good quality.
It is therefore an object of the present invention to provide a bi-directional sliding pendulum seismic isolator being able to overcome said disadvantages. Said object is achieved with a bi-directional sliding pendulum seismic isolator, whose main features are disclosed in claim 1, while other features are disclosed in the subsequent claims.
The bi-directional sliding pendulum seismic isolator according to the present invention includes a rail-shaped lower sliding element and a rail-shaped upper sliding element that are substantially perpendicular to each other and have cylindrical concave surfaces opposite to each other. Between the lower and upper sliding elements a first and a second intermediate element are arranged, which slide along said cylindrical concave surfaces of the sliding elements by means of corresponding cylindrical convex surfaces.
The first intermediate element is provided with a cylindrical concave surface opposite to its cylindrical convex sliding surface and having the axis perpendicular to the axis of the cylindrical concave surface of the lower sliding element. Similarly, the second intermediate element is provided with a concave surface opposite to its cylindrical convex sliding surface and having the axis perpendicular to the axis of the cylindrical concave surface of the upper sliding element. Between the first and the second intermediate element a third intermediate element is arranged, having a lower surface and an upper surface that are both cylindrical convex surfaces and have their axes perpendicular to each other. The three intermediate elements constitute a joint having the shape of a cylindrical double saddle that allows the movement and the relative rotation between the rail-shaped sliding elements.
The main advantage of the isolator according to the present invention is that, thanks to the particular cylindrical double-saddle design, it is possible to dimension the joint arranged between the rail-shaped sliding elements in function of the actual load conditions as well as the movements and the rotations foreseen in the two sliding directions, thus avoiding a useless oversizing and above all optimizing the design solutions.
Saving material allows to manufacture a cheaper joint with respect to known spherical joints, resulting in a notable reduction of the manufacturing costs of the isolator.
Another advantage of the isolator according to the present invention is that the manufacturing of the joint with cylindrical sliding surfaces is remarkably easier and cheaper than the manufacturing of spherical surfaces, thus being able to achieve sliding surfaces of optimum quality in a relatively easy way, both directly working metal surfaces of hard materials such as stainless steel and in the case of coverings with thin plates, which further contributes to the optimization of the isolator costs.
These and other advantages of the bi-directional sliding pendulum seismic isolator according to the present invention will become clear to those skilled in the art from the following detailed description of an embodiment thereof with reference to the attached drawings, wherein: figure 1 shows a perspective view of a bi-directional sliding pendulum seismic isolator according to the present invention; figure 2 is a sectional view of the isolator of figurel along line II-II; - figure 3 is a detail III of figure 2; figure 4 is a sectional view of the isolator of figure 1 along line TV-IV; figure 5 is a detail V of figure 4; and figure 6 is a perspective exploded view of the isolator of figure 1.
Referring to the above-mentioned figures, there is seen that a bi-directional sliding pendulum seismic isolator according to the present invention conventionally includes a rail-shaped lower sliding element 1 and a rail-shaped upper sliding element 2 substantially perpendicular to each other. Lower and upper sliding elements 1, 2 are respectively provided with a cylindrical concave sliding surface Ia facing upward and a cylindrical concave sliding surface 2a facing downward. Between the lower and upper sliding elements 1, 2 a first and a second intermediate element 3, 4 are arranged, each having a cylindrical convex sliding surface 3 a, 4a suitable to allow them to slide respectively along cylindrical concave surfaces Ia, 2a of lower and upper sliding elements 1, 2. A third intermediate elements 5 is arranged between the first and second intermediate element 3, 4.
According to the novel aspect of the present invention, the first intermediate element 3 is provided with a cylindrical concave surface 3b opposite to its cylindrical convex sliding surface 3 a and having the axis perpendicular to the axis of the cylindrical concave surface Ia of the lower sliding element 1. Similarly, the second intermediate element 4 is provided with a cylindrical concave surface 4b opposite to its cylindrical convex sliding surface 4a and having the axis perpendicular to the axis of the cylindrical concave surface 2a of the upper sliding element 2. The third intermediate element 5 has a lower surface 5a and an upper surface 5b that are both cylindrical convex surfaces and have their axes substantially perpendicular to each other.
When the isolator is assembled, the lower surface 5a and the upper surface 5b of the third intermediate element 5 are in contact with surfaces 3b, 4b of the first and second intermediate element 3, 4, respectively, and allow a relative rotation between the intermediate elements 3, 4.
Thus, elements 3, 4 and 5 constitute a joint having the shape of a cylindrical double saddle that allows relative rotations and movements of the lower and upper sliding elements 1, 2 in the two sliding directions defined by the isolator. The curvature radiuses of the cylindrical surfaces may be different in the two sliding directions, in order to better fit the actual movements and rotations of the superstructure. In order to withstand the horizontal loads occurring during a seismic event, coupling means are provided between the lower and upper sliding elements 1, 2 and the intermediate elements 3, 4 and 5 in the transverse direction. Such coupling means are, for example, lateral guides formed on the sliding elements 1, 2 and on the intermediate elements 3, 4, 5 and arranged along the movement direction allowed by the single coupling.
In the illustrated embodiment, the first sliding element 1 is provided with guides Ib, Ic along its sides suitable for retaining the first intermediate element 3 in the transverse direction. On the contrary, the transverse constraint between the upper sliding element 2 and the second intermediate element 4 is made up of a pair of guides 4c, 4d fixed on the second intermediate element 4 itself. Similarly, the third intermediate element 5 is constrained to the first and second intermediate element 3, 4 by means of guides 3c, 3d and 4e, 4f respectively formed thereon.
Preferably, the sliding surfaces Ia, 3a; 2a, 4a; 3b, 5a; 4b, 5b are covered with plates made of controlled friction materials that are combined between them so as to minimize the wear. Alternatively, it is possible to directly manufacture the sliding elements in controlled friction materials. Controlled friction materials suitable for the application to isolators are, for instance, stainless steel and polymeric materials chosen among, for example, polyethylene, polyamidic resins and PTFE suitably modified and/or filled.
Moreover, it is possible to employ controlled friction materials having different friction coefficients in the two sliding directions of the isolator, allowing to optimize the seismic response in the two movement directions, as well as to lubricate the sliding surfaces. In the illustrated embodiment, the cylindrical concave surfaces Ia, 2a of the lower and upper sliding elements 1, 2 are covered with mirror polished stainless steel plates S and the cylindrical convex surfaces 3 a, 4a of the first and second intermediate element 3, 4 are covered with plates T made of polyethylene. On the contrary, the third intermediate element 5 is entirely made of stainless steel with the cylindrical convex surfaces 5 a, 5b being mirror polished and slidable on polyethylene plates T that are respectively arranged in suitable seats formed in the cylindrical concave surfaces 3b, 4b of the first and second intermediate element 3, 4.
The isolator according to the present invention also preferably comprises a plurality of anchoring elements 6, for example metal plates having a central hole, arranged at the base of the lower and upper sliding elements 1, 2 at their ends. Anchoring elements 6 serve to fix the lower and upper sliding elements 1, 2 to the superstructure and to its foundations by using, for instance, screws 7 engaging the threaded holes of anchor bars 8 buried in concrete.
It is clear that the above-described and illustrated embodiment of the isolator according to the invention is only an example susceptible of numerous variations. In particular, it is possible to use other controlled friction materials well known to those skilled in the art for covering the sliding surfaces. Moreover, as far as the sliding surfaces made of metal materials are concerned it is possible to use special materials such as chrome-nickel steel in order to provide high characteristics of hardness and to minimize wear.

Claims

1. A bi-directional sliding pendulum seismic isolator comprising: a rail-shaped lower sliding element (1) and a rail-shaped upper sliding element (2) substantially perpendicular to each other, said lower and upper sliding elements (1, 2) being provided with a cylindrical concave surface (Ia) facing upward and a cylindrical concave surface (2a) facing downward, respectively, a first and a second intermediate element (3, 4) arranged between said lower and upper sliding elements (1, 2) and each provided with a cylindrical convex sliding surface (3 a, 4a) suitable to allow the sliding of the first and second intermediate elements (3, 4) along said cylindrical concave surfaces (Ia, 2a) of the lower and upper sliding elements (1, 2), a third intermediate element (5) arranged between the first and second intermediate elements (3, 4), and coupling means in the transverse direction suitable to withstand the horizontal loads occurring during a seismic event, characterized in that said first intermediate element (3) has a cylindrical concave surface (3b) opposite to its cylindrical convex sliding surface (3 a) and having the axis perpendicular to the axis of the cylindrical concave surface (Ia) of the lower sliding element (1), said second intermediate element (4) has a cylindrical concave surface (4b) opposite to its cylindrical convex sliding surface (4a) and having the axis perpendicular to the axis of the cylindrical concave surface (2a) of the upper sliding element (2), and said third intermediate element (5) has a lower surface (5a) and an upper surface (5b) that are both cylindrical convex surfaces and have their axes substantially perpendicular to each other, said lower and upper cylindrical convex surfaces (5a, 5b) of the third intermediate element (5) being respectively in contact with the cylindrical concave surface (3b) of the first intermediate element (3) and the cylindrical concave surface (4b) of the second intermediate element (4), and being suitable to allow a relative rotation between the intermediate elements (3, 4).
2. An isolator according to the previous claim, characterized in that said coupling means in the transverse direction are lateral guides (Ib, Ic, 4c, 4d, 3c, 3d, 4e, 4f) formed on and/or fixed to the sliding elements (1, 2) and the intermediate elements (3, 4) and arranged along the movement direction allowed by the single coupling.
3. An isolator according to one of the previous claims, characterized in that the sliding surfaces (Ia, 3a; 2a, 4a; 3b, 5a; 4b, 5b) are covered with plates made of controlled friction materials.
4. An isolator according to the previous claim, characterized in that said controlled friction materials are stainless steel and polymeric materials chosen among polyethylene, polyamidic resins and PTFE modified and/or filled.
5. An isolator according to claim 3, characterized in that said controlled friction materials have different friction coefficients in the two sliding directions of the isolator.
6. An isolator according to claim 3, characterized in that the cylindrical concave surfaces (Ia, 2a) of the lower and upper sliding elements (1, 2) are covered with mirror polished stainless steel plates (S) and the cylindrical convex surfaces (3 a, 4a) of the first and second intermediate element (3, 4) are covered with polyethylene plates (T), and in that the third intermediate element (5) is entirely made of stainless steel, its cylindrical convex surfaces (5 a, 5b) being mirror polished and slidable on polyethylene plates (T) arranged in suitable seats formed in the cylindrical concave surfaces (3b, 4b) of the first and the second intermediate element (3, 4), respectively.
7. An isolator according to one of the previous claims, characterized by further comprising a plurality of anchoring elements (6) arranged at the base of the lower and upper sliding elements (1, 2) at their ends, said anchoring elements (6) being suitable to allow the fixing of the lower and upper sliding elements (1, 2) to the superstructure and to its foundations.
8. An isolator according to the previous claim, characterized in that said anchoring elements (6) are metal plates provided with a central hole.
EP07827678A 2007-09-11 2007-09-11 Sliding pendulum seismic isolator Not-in-force EP2198099B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2007/000626 WO2009034585A1 (en) 2007-09-11 2007-09-11 Sliding pendulum seismic isolator

Publications (2)

Publication Number Publication Date
EP2198099A1 true EP2198099A1 (en) 2010-06-23
EP2198099B1 EP2198099B1 (en) 2011-02-02

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EP07827678A Not-in-force EP2198099B1 (en) 2007-09-11 2007-09-11 Sliding pendulum seismic isolator

Country Status (4)

Country Link
EP (1) EP2198099B1 (en)
AT (1) ATE497565T1 (en)
DE (1) DE602007012373D1 (en)
WO (1) WO2009034585A1 (en)

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ITMI20110257A1 (en) * 2011-02-21 2012-08-22 Milano Politecnico ANTI-SEISMIC SUPPORT.
EP2873883B1 (en) * 2013-11-18 2018-02-21 Cave S.r.l. Sliding bearing for structural engineering
IT201900005478A1 (en) * 2019-04-09 2020-10-09 Univ Pisa DEVICE TO PROTECT ARTIFACTS, IN PARTICULAR WORKS OF ART, FROM SEISMIC ACTIONS AND VIBRATORY PHENOMENA IN GENERAL
IT202000002542A1 (en) * 2020-02-10 2021-08-10 Fip Mec S R L ANTI-SEISMIC INSULATOR OF THE SLIDING PENDULUM TYPE

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WO2008096378A1 (en) * 2007-02-06 2008-08-14 Alga S.P.A. Sliding pendulum seismic isolator
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ITTO20130111A1 (en) 2013-02-11 2014-08-12 B2B Srl ANTI SEISMIC INSULATOR.
DE102013104064A1 (en) * 2013-04-22 2014-10-23 Maurer Söhne Engineering GmbH & Co. KG Structural bearings
WO2017082839A1 (en) 2015-11-13 2017-05-18 Ugur Gunduz Earthquake isolator and production method of such an isolator
KR102661847B1 (en) 2018-09-11 2024-04-30 삼성전자주식회사 Semiconductor device
US11421435B2 (en) * 2018-12-12 2022-08-23 Universidad Catolica De La Santisima Concepcion Kinematic seismic isolation device

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DE102005060375A1 (en) * 2005-12-16 2007-06-21 Steelpat Gmbh & Co. Kg Bearing for protection for structures, formed as sliding pendulum bearing, has slide material which comprises a plastic with elasto-plastic compensating quality, especially plastic with low friction

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20110257A1 (en) * 2011-02-21 2012-08-22 Milano Politecnico ANTI-SEISMIC SUPPORT.
WO2012114246A1 (en) * 2011-02-21 2012-08-30 Politecnico Di Milano Antiseismic support
EP2873883B1 (en) * 2013-11-18 2018-02-21 Cave S.r.l. Sliding bearing for structural engineering
IT201900005478A1 (en) * 2019-04-09 2020-10-09 Univ Pisa DEVICE TO PROTECT ARTIFACTS, IN PARTICULAR WORKS OF ART, FROM SEISMIC ACTIONS AND VIBRATORY PHENOMENA IN GENERAL
IT202000002542A1 (en) * 2020-02-10 2021-08-10 Fip Mec S R L ANTI-SEISMIC INSULATOR OF THE SLIDING PENDULUM TYPE
EP3862593A1 (en) 2020-02-10 2021-08-11 Fip Mec S.R.L. Anti-seismic isolator of the sliding pendulum type

Also Published As

Publication number Publication date
WO2009034585A1 (en) 2009-03-19
ATE497565T1 (en) 2011-02-15
DE602007012373D1 (en) 2011-03-17
EP2198099B1 (en) 2011-02-02

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