US20180142489A1 - Aseismic device - Google Patents

Aseismic device Download PDF

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Publication number
US20180142489A1
US20180142489A1 US15/816,656 US201715816656A US2018142489A1 US 20180142489 A1 US20180142489 A1 US 20180142489A1 US 201715816656 A US201715816656 A US 201715816656A US 2018142489 A1 US2018142489 A1 US 2018142489A1
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United States
Prior art keywords
dissipator
flexural
axial
axis
hinge
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Abandoned
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US15/816,656
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English (en)
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Francesca BECCI
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Individual
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Individual
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    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/388—Separate connecting elements
    • E04B1/40—
    • E04B1/985—
    • 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
    • E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/88—Curtain walls
    • E04B2/90—Curtain walls comprising panels directly attached to the structure
    • E04B2/94—Concrete panels

Definitions

  • the present patent application for industrial invention relates to an aseismic device used to connect two structural elements of a building, such as for example a wall or a panel, to a beam.
  • WO2014/166849 discloses an aseismic connection device comprising:
  • Said aseismic connection device has an excellent resistance to the tractive stress produced when the beam and the panel are moved apart. Nevertheless, the aseismic device is not capable of withstanding the compressive stress produced when the beam and the panel are moved closer. Consequently, during the seismic oscillations, hammering from impulsive load is produced between the beam and the panel due to the lack of compressive constraint. Said hammering increases when the spaces that are formed between the panel and the beam increase because of the deformation of the deformable bar.
  • US2013/051903 discloses a device used to connect two structural elements. Such a device comprises:
  • Each coupling is composed of a sleeve and a plate with an overturned “U”-shaped groove.
  • Each coupling is connected to the connector by means of a bolt that is engaged in the sleeve and acts as hinge, so as to let the coupling rotate around an axis orthogonal to the longitudinal axis of the flexural dissipator.
  • the couplings are connected to the sliding element by means of a bar that is engaged in the overturned “U”-shaped grooves of the plates of the couplings and in the “U”-shaped grooves of supports that are joined to the sliding element.
  • a bar acts as hinge so as to let the couplings rotate around an axis parallel to the longitudinal axis of the flexural dissipator.
  • a first drawback consists in the fact that the plates of the couplings and the supports of the sliding element do not surround the bar of the hinge completely. Consequently, in case of vertical sussultatory oscillations combined with horizontal undulatory oscillations produced by an earthquake, the two structural elements can move because the plates of the couplings and the supports of the sliding element do not hold the bar of the hinge. Therefore, such a device is not capable of absorbing seismic sussultatory oscillations.
  • the plates of the couplings and the supports of the sliding element do not act as axial dissipators in case of sussultatory oscillations, acting instead as non-dissipating connectors that are not capable of preventing a hammering effect that is produced during the earthquake.
  • a second drawback is related to the two vertical hinges composed of the two bolts disposed in the two sleeves of the couplings.
  • the plates of the couplings tend to rotate around the axis of the sleeve in a different way; therefore the overturned “U”-shaped grooves of the plates of the couplings are misaligned and the plates of the couplings cannot slide on the bar along a horizontal direction. Consequently, the plates of the couplings tend to get jammed with the bar of the hinge.
  • the purpose of the present invention is to eliminate the drawbacks of the prior art by disclosing an aseismic device used to connect two structural elements, which is reliable and capable of controlling the sliding of a sliding element on a deformable bar.
  • Another purpose of the present invention is to disclose such an aseismic device that is capable of avoiding hammering between the structural elements and dampening the seismic actions also when the sliding element is situated at the ends of the deformable bar.
  • Another purpose of the present invention is to disclose such a connection system that is capable of eliminating or controlling the extra tension caused by the vertical deformations of the device.
  • the aseismic device of the invention comprises:
  • the axial dissipator consists in a “U”-bent plate intended to be deformed with axial stress with tractive and compressive axial stress to compensate for the movements produced by compressive actions, in which the structural elements are moved closer, and the movements produced by tractive actions, in which the structural elements are moved apart.
  • the hinges contribute to control the sliding movement of the sliding element on the flexural dissipator also in case of serious errors in the mounting of the flexural dissipator.
  • the peculiarity of the invention is represented by the fact that the sliding element comprises a sleeve closed as a ring around said flexural dissipator.
  • the sliding element surrounds the flexural dissipator completely. Therefore, in case of sussultatory vertical oscillations, the sleeve of the sliding element retains the flexural dissipator, guaranteeing a stable connection between the structural elements.
  • the advantages of the aseismic device according to the present invention are evident because it permits to compensate for the movements caused by the compressive and tractive actions suffered by the aseismic device during an earthquake, guaranteeing the sliding movement of the sliding element on the flexural dissipator also in case of serious errors in the mounting of the flexural dissipator.
  • FIG. 1 is a perspective view of the aseismic device according to the invention, applied to two structural elements of a building structure;
  • FIG. 2 is an enlarged view of the aseismic device of FIG. 1 ;
  • FIG. 3 is an exploded view of the aseismic device of FIG. 2 ;
  • FIG. 4 is an exploded view of a flexural dissipator of FIG. 3 ;
  • FIG. 5 is an exploded view of a sliding element of FIG. 3 ;
  • FIG. 6 is an exploded view of an axial dissipator of FIG. 3 ;
  • FIG. 7 is an enlarged view of a connector of FIG. 3 ;
  • FIGS. 8 and 9 are two perspective views showing the aseismic device of the invention from different angles, following to a raising of the beam with respect to the panel caused by the sussultatory action from down upwards;
  • FIGS. 10 and 11 are two perspective views showing the aseismic device of the invention from different angles, following to a lowering of the beam with respect to the panel caused by the sussultatory action from up downwards;
  • FIG. 12 is a perspective view of the aseismic device of the invention, with an error in the mounting of the flexural dissipator;
  • FIGS. 13 and 14 are two top views of the aseismic device of FIG. 12 , with the sliding element disposed in the proximity of the left and of the right end of the flexural dissipator, respectively.
  • the aseismic device of the invention is described, which is generally indicated with reference numeral 1 .
  • FIG. 1 shows a first structural element (T), such as for example a beam, and a second structural element (P), such as for example a panel or a wall of a building.
  • the second structural element (P) is intended to be connected to the first structural element (T) by means of the aseismic device ( 1 ).
  • the terms “transverse” and “longitudinal” refer to the transverse and longitudinal direction of the first structural element (T), respectively.
  • the first structural element (T) When the first structural element (T) is connected to the second structural element (P), an internal surface (P 1 ) of the second structural element is stopped against a longitudinal edge of the first structural element (T).
  • the first structural element (T) has an upper surface (T 1 ) orthogonal to the internal surface (P 1 ) of the second structural element.
  • the aseismic device ( 1 ) comprises:
  • the flexural dissipator ( 2 ) has a longitudinal axis (X).
  • the flexural dissipator ( 2 ) is fixed above the upper surface (T 1 ) of the first structural element (T) so that the longitudinal axis (X) of the flexural dissipator is parallel to the longitudinal axis of the first structural element (T).
  • the axial dissipator ( 8 ) is extended or contracted along a transverse axis (Z) orthogonal to the longitudinal axis (X) of the flexural dissipator. Due to a mounting defect, the transverse axis (Z) can be inclined with respect to the upper surface (T 1 ) of the first structural element by an angle comprised between 1° and 5°.
  • the axial dissipator ( 8 ) comprises a bracket ( 80 ) composed of a “U”-bent plate intended to be deformed with axial stress along the transverse axis (Z), both in traction and in compression, to compensate for a movement produced by compressive actions, in which the structural elements (P, T) are moved closer, and for a movement produced by tractive actions, in which the structural elements (P, T) are moved apart.
  • the axial dissipator ( 8 ) is connected to the sliding element ( 4 ) by means of a first hinge ( 5 ) that permits a rotation around a vertical axis (Y) orthogonal to the longitudinal axis (X) and to the transverse axis (Z).
  • the axial dissipator ( 8 ) is connected to the connector (C) by means of a second hinge ( 9 ) that permits a rotation around an axis (X 1 ) parallel to the longitudinal axis (X).
  • the bracket ( 80 ) of the axial dissipator ( 8 ) comprises a base ( 81 ) and two wings ( 82 ) that extend orthogonally from the base.
  • the base ( 81 ) is faced towards the connector (C) and the wings ( 82 ) are faced towards the flexural dissipator ( 2 ).
  • the two wings ( 82 ) of the bracket ( 80 ) of the axial dissipator are disposed on planes above and below the longitudinal axis (X) of the flexural dissipator ( 2 ).
  • the transverse axis (Z) orthogonally passes by the center of the base ( 81 ) of the flexural dissipator.
  • a nut ( 83 ) is disposed inside the bracket ( 80 ).
  • the nut has a threaded hole ( 86 ).
  • the nut ( 83 ) is connected to the base ( 81 ) of the axial dissipator ( 8 ) by means of a wing ( 84 ), in such a way that the nut ( 83 ) is disposed with an axis that coincides with the axis (X 1 ) of the second hinge ( 9 ).
  • Holes ( 85 ) with an axis that coincides with the vertical axis (Y) of the first hinge ( 5 ) are obtained in the two wings ( 82 ) of the axial dissipator.
  • the vertical axis (Y) is orthogonal to the longitudinal axis (X) of the flexural dissipator and to the transverse axis (Z).
  • the flexural dissipator ( 2 ) can consist in a metal section, for example a steel section, and can have a shape with “H”-section or a tubular shape with rectangular section, being internally empty.
  • the flexural dissipator ( 2 ) is connected to the first structural element (T) by means of two flanges ( 3 , 3 ′) disposed at the ends of the flexural dissipator ( 2 ).
  • the flanges ( 3 , 3 ′) are connected to the upper surface (T 1 ) of the first structural element in order to raise the flexural dissipator ( 2 ) with respect to the first structural element (T), defining a space (G) between the upper surface (T 1 ) of the first structural element and the flexural dissipator ( 2 ).
  • the longitudinal axis (X) of the flexural dissipator ( 2 ) is parallel to the internal surface (P 1 ) of the second structural element.
  • Each flange ( 3 , 3 ′) has an “L”-shaped transverse section and is provided with a first wing ( 30 ) connected to the first structural element (T) and a second wing ( 31 ) connected to the flexural dissipator ( 2 ).
  • the first wing ( 30 ) of the first flange ( 3 ) has a slot ( 32 ) that extends in parallel direction to the longitudinal axis (X) of the flexural dissipator.
  • the first wing ( 30 ) of the second flange ( 3 ′) has a slot ( 32 ′) that extends along an orthogonal direction to the longitudinal axis (X) of the flexural dissipator.
  • Bolts or inserts ( 33 ) are passed through the slots ( 32 , 32 ′) of each flange and firmly engaged in the first structural element (T).
  • the dissipator ( 2 ) can translate in a parallel orthogonal direction relative to its longitudinal axis (X).
  • the slots ( 32 , 32 ′) of the flanges ( 3 , 3 ′) are orthogonal .
  • the slot ( 32 ) of the first flange ( 3 ) is parallel to the longitudinal axis (X) in order to mount the aseismic device astride two different beams.
  • the slot ( 32 ) must be on a smooth surface in order to avoid the stress produced on the insert ( 32 ) by temperature variations between the beams.
  • the slot ( 32 ′) of the second flange ( 3 ′) is orthogonal to the longitudinal axis (X) in order to minimize any errors made during the mounting process.
  • a small plate ( 34 ) is connected to the bolt ( 33 ) of the second flange.
  • the small plate ( 34 ) is stopped against the first wing ( 30 ) of the second flange, producing friction between the small plate ( 34 ) and the first wing ( 30 ).
  • the small plate ( 34 ) has a grooved or knurled lower surface that is engaged with a grooved or knurled upper surface ( 36 ) of the first wing of the second flange.
  • the grooved surface ( 36 ) of the first wing of the second flange is provided with a plurality of ribs that protrude in upper position from the first wing of the second flange in parallel direction to the longitudinal axis (X) of the flexural dissipator.
  • Such a grooved surface ( 36 ) of the second flange ( 3 ′) is used to retain the aseismic device ( 1 ) firmly in the most correct position.
  • the second wing ( 31 ) of each flange has a circular hole ( 37 ) and a slot ( 38 ) that extends in a direction orthogonal to the longitudinal axis (X) of the flexural dissipator and to the slot ( 32 ′) of the first wing of the second flange.
  • Two attachments ( 20 ) are disposed at the ends of the flexural dissipator ( 2 ).
  • Each attachment ( 20 ) has a first hole ( 21 ) and a second hole ( 21 ′) with axes parallel to the longitudinal axis (X) of the flexural dissipator.
  • a first screw ( 22 ) is inserted in the circular hole ( 37 ) of the second wing of the flange and in the first hole ( 21 ) of the attachment.
  • a second screw ( 22 ) is inserted in the circular hole ( 38 ) of the second wing of the flange and in the first hole ( 21 ) of the attachment.
  • the first screw ( 22 ) can act as pivoting axis and the second screw ( 22 ′) can move in the slot ( 38 ) of the second wing of the flange. Consequently, the flexural dissipator ( 2 ) can rotate around an axis (X 2 ) that passes by the first screw ( 22 ); otherwise said, it can rotate around an axis parallel to the longitudinal axis (X) of the flexural dissipator.
  • the dimensions of the slot ( 38 ) of the second wing control the rotation of the flexural dissipator. Such a measure compensates for the torsional stress suffered by the flexural dissipator ( 2 ) during an earthquake. Because of the provision of two hinges with axis parallel to the longitudinal axis (X) of the flexural dissipator ( 2 ), the first and the second structural element (T, P) can translate vertically in case of sussultatory seismic actions.
  • first screw ( 22 ) and the second screw ( 22 ′) are equally spaced and disposed in opposite position relative to the longitudinal axis (X) of the flexural dissipator.
  • Bushings ( 24 , 24 ′) are mounted on the screws ( 22 , 22 ′) that are partially threaded to prevent the screws ( 22 , 22 ′) from being overtightened and reduce the friction of the screws relative to the flanges ( 3 ).
  • the sliding element ( 4 ) comprises a sleeve ( 40 ) closed as a ring around the flexural dissipator ( 2 ).
  • the sleeve ( 40 ) has a tubular shape with rectangular section.
  • the sliding element ( 4 ) can slide on the flexural dissipator ( 2 ) along the space (G) between the flexural dissipator ( 2 ) and the first structural element (T).
  • the flanges ( 3 ) disposed at the ends of the flexural dissipator ( 2 ) act as travel stops for the sliding element ( 4 ).
  • the sleeve ( 40 ) of the sliding element is disposed between the two wings ( 82 ) of the bracket ( 80 ) of the axial dissipator and surrounds the flexural dissipator ( 2 ) completely. Therefore, in case of vertical sussultatory oscillations combined with horizontal undulatory oscillations, the sleeve ( 4 ) is deformed, but retains the flexural dissipator ( 2 ) without producing clearance, thus preventing a hammering effect between the first structural element (T) and the second structural element (P).
  • the sleeve ( 40 ) is obtained from four plates that are mutually connected: a lower plate ( 41 ), an upper plate ( 42 ), a front plate ( 43 ) and a back plate ( 44 ).
  • Two Teflon inserts ( 40 a , 40 b ) are disposed in the sleeve ( 40 ) and intended to rub against a longitudinal front edge ( 2 a ) and a longitudinal rear edge ( 2 b ) of the flexural dissipator, respectively.
  • the Teflon inserts ( 40 a , 40 b ) act as sliding bearing.
  • the sliding element ( 4 ) can slide freely on the flexural dissipator ( 2 ).
  • the front and the back plates ( 43 , 44 ) have a grooved or knurled internal surface ( 45 ) that is coupled with a grooved or knurled surface ( 48 ) of the Teflon inserts ( 40 a , 40 b ).
  • the grooved surface ( 45 ) of the front plate and of the back plate is provided with a plurality of ribs that protrude from the front plate and from the back plate in parallel direction to the axis (Y).
  • the grooved surfaces ( 45 , 48 ) of the sliding element and of the Teflon inserts are used to prevent the Teflon inserts from sliding relative to the sliding element.
  • the upper plate and the lower plate ( 41 , 42 ) are provided with holes ( 46 ) with axis that coincides with the vertical axis (Y) of the first hinge ( 5 ).
  • the sliding element ( 4 ) is disposed between the wings ( 82 ) of the axial dissipator in such a manner that the holes ( 85 ) of the wings of the axial dissipator are aligned with the holes ( 46 ) of the sliding element.
  • the holes ( 46 ) of the sliding element are threaded holes.
  • Screws ( 50 ) are inserted in the holes ( 85 ) of the wings of the axial dissipator and tightened into the threaded holes ( 46 ) of the sliding element in such a way to form the first hinge ( 5 ) that permits the rotation of the axial dissipator around the vertical axis (Y).
  • the screws ( 50 ) that are tightened in the threaded holes ( 46 ) of the sliding element are partially threaded to prevent overtightening.
  • the connector (C) comprises guide means (M) fixed to the second structural element (P).
  • the second hinge ( 9 ) is connected to the guide means (M) in such a way to permit a translation and centering of the second hinge ( 9 ) along an axis parallel to the vertical axis (Y).
  • the guide means (M) comprise two guides ( 6 ) intended to be fixed to the second structural element (P). Each guide ( 6 ) is provided with anchoring clamps ( 61 ) intended to be anchored to the second structural element (P).
  • Each guide ( 6 ) comprises two guide tracks ( 60 ) disposed in parallel position in such a way to form a space ( 62 ).
  • the guide ( 6 ) can be a traditional Halfen® guide composed of a “C”-section, which is normally found on the market.
  • Each carriage ( 7 ) is disposed in the space ( 62 ) of each guide, being suitable for sliding vertically in the direction of an axis parallel to the vertical axis (Y).
  • Friction means are provided to block a free sliding movement of the carriages ( 7 ) in the guides ( 6 ).
  • Each carriage ( 7 ) comprises a plate wherein a bolt ( 70 ) is mounted, protruding from the guide.
  • a bushing is mounted on the bolt ( 70 ) to minimize the sliding friction.
  • the second hinge ( 9 ) comprises two flanges ( 90 ) shaped as a plate and disposed in parallel position. Each flange ( 90 ) has a slot ( 91 ) that extends in vertical direction. Two perforated attachments ( 92 ) protrude from each flange ( 9 ), being engaged by the bolts ( 70 ) of the guides ( 6 ), in such a way to connect the flanges ( 90 ) to the guides ( 6 ).
  • the axial dissipator ( 8 ) is disposed between the two flanges ( 90 ) of the second hinge, in such a way that the threaded hole ( 86 ) of the nut of the axial dissipator is in register with the slots ( 91 ) of the two flanges ( 90 ) of the second hinge.
  • Two screws ( 93 ) are inserted in the slots ( 91 ) of the flanges ( 90 ) and tightened inside the nut ( 83 ) of the axial dissipator.
  • the screws ( 93 ) are partially threaded to prevent overtightening.
  • the axial dissipator ( 8 ) can rotate around the axis (X 1 ) of the screws ( 93 ) that coincides with the axis of the second hinge ( 9 ). Moreover, the screws ( 93 ) can translate in the slots ( 91 ) of the two flanges, letting the axial dissipator additionally slide along the vertical axis (Y) in case of overtightening the screws ( 70 ) with the head inserted in the space ( 62 ) of the guides. In any case, the entire second hinge ( 9 ) can translate relative to the guides ( 6 ) along an axis parallel to the vertical axis (Y).
  • the longitudinal axis (X) of the flexural dissipator ( 2 ), the vertical axis (Y) of the first hinge ( 5 ) and the transverse axis (Z) form a Cartesian or non-Cartesian set of three axes because the transverse axis (Z) can be inclined with respect to a horizontal plane composed of the upper surface (T 1 ) of the first structural element due to a mounting defect.
  • the aseismic device ( 1 ) permits a free relative moment of the second structural element (P) with respect to the first structural element (T) only in the direction of the longitudinal axis (X) because the sliding element ( 4 ) can slide freely relative to the flexural dissipator ( 2 ) along the longitudinal axis (X) of the flexural dissipator, permitting oscillatory actions parallel to the longitudinal axis (X).
  • the aseismic device ( 1 ) dampens the oscillatory actions in the direction of the transverse axis (Z), controlling the relative movement of the second structural element (P) with respect to the first structural element (T), in the direction of the transverse axis (Z) because of the provision of the axial dissipator ( 8 ) and of the flexural dissipator ( 2 ).
  • the aseismic device ( 1 ) permits movements along the vertical axis (Y) as a consequence of the sussultatory seismic actions.
  • the aseismic device ( 1 ) does not permit a free relative movement of the second structural element (P) with respect to the first structural element (T), in the direction of the vertical axis (Y) because of the provision of the friction means that block a free sliding movement of the carriages ( 7 ) in the guides ( 6 ), which have the main purpose of centering the device, controlling the mounting errors in vertical direction.
  • the flexural dissipator ( 2 ) joined to the first structural element (T) can slide relative to the sliding element ( 4 ) in the direction of the axis (X), regardless of the second structural element (P), thus preventing any impulsive stress on the second structural element (P) and possible failures.
  • the axial dissipator ( 8 ) and the flexional dissipator ( 2 ) are deformed when the structural elements (P, T) are moved apart, being compressed and shortened when the structural elements (P, T) are moved closer.
  • the axial dissipator ( 8 ) and the flexional dissipator ( 2 ) compensate for the oscillations of the first structural element (T) in the direction of the transverse axis (Z), preventing the first structural element (T) from violently hitting and damaging the second structural element (P).
  • the movement of the first structural element (T) along the transverse axis (Z) is additionally compensated because of the provision of the plate ( 34 ) of the second flange ( 3 ′) that can frictionally slide on the first wing ( 30 ) of the second flange ( 3 ′).
  • the first structural element (T) suffers oscillations in the direction of the vertical axis (Y) during an earthquake, such a movement is mainly compensated because of the rotation of the flexural dissipator ( 2 ) around the axis (X 2 ) and of the rotation of the axial dissipator ( 8 ) around the axis (X 1 ).
  • the aseismic device ( 1 ) of the invention provides for hinging the flexural dissipator ( 2 ) to the flanges ( 3 , 3 ′) along an axis (X 2 ) parallel to the longitudinal axis (X) of the flexural dissipator.
  • the axial dissipator ( 8 ) is connected to the second hinge ( 9 ) in such a way to rotate around an axis (X 2 ) parallel to the longitudinal axis (X) of the flexural dissipator.
  • FIGS. 8 and 9 show the case in which the second structural element (P) is lowered with respect to the first structural element (T). Consequently, the flexural dissipator ( 2 ) rotates around the axis (X 2 ) of the screws ( 22 ) that are engaged in the flanges ( 3 , 3 ′), and the screws ( 22 ′) are lowered in the slots ( 38 ) of the flanges ( 3 , 3 ′).
  • FIGS. 10 and 11 show the case in which the first structural element (T) is lowered with respect to the second structural element (P). Consequently, the flexural dissipator ( 2 ) rotates around the axis (X 2 ) of the screws ( 22 ) and the screws ( 22 ′) are raised in the slots ( 38 ) of the flanges ( 3 , 3 ′).
  • the flexural dissipator ( 2 ) does not suffer a high torsional stress because of the provision of the second hinge ( 9 ) connected to the axial dissipator that permits a rotation of the axial dissipator relative to the connector (C) around the axis (X 1 ) of the second hinge.
  • FIGS. 12-14 show the case in which the aseismic device ( 1 ) is mounted with a mounting defect, wherein the axis (X) of the flexural dissipator ( 2 ) is not parallel to the internal surface (P 2 ) of the second structural element. Because of such an installation, the first structural element (T) and the second structural element (P) are moved closer and apart during the sliding movement of the sliding element ( 4 ) on the flexural dissipator ( 2 ).
  • the flexural dissipator ( 2 ) and the axial dissipator ( 8 ) are not only used to dampen the actions by which the two structural elements (T, P) are moved closer or apart, but are mainly used to control the forces produced when the sliding movement of the sliding element ( 4 ) is prevented by mounting defects of the flexural dissipator ( 2 ).

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Vibration Prevention Devices (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Dampers (AREA)
  • Load-Bearing And Curtain Walls (AREA)
US15/816,656 2016-11-21 2017-11-17 Aseismic device Abandoned US20180142489A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000117580 2016-11-21
IT102016000117580A IT201600117580A1 (it) 2016-11-21 2016-11-21 Dispositivo antisismico perfezionato.

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Cited By (4)

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CN109057387A (zh) * 2018-07-25 2018-12-21 深圳市君盈建筑科技有限公司 一种混凝土浇筑钢框架
US20190257107A1 (en) * 2016-06-08 2019-08-22 Murat DÍCLELÍ Torsional hysteretic damper
CN114087274A (zh) * 2021-09-21 2022-02-25 中国航空工业集团公司西安飞机设计研究所 一种预制振动可旋转连接结构
US11447970B2 (en) * 2020-08-04 2022-09-20 Simpson Strong-Tie Company Inc. Pinned base connection for a structural member

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JP3284394B2 (ja) * 1996-02-06 2002-05-20 ワイケイケイアーキテクチュラルプロダクツ株式会社 カーテンウオールのファスナー
KR100984339B1 (ko) * 2010-05-04 2010-09-30 나태용 커튼월 고정용 가변형 화스너

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US20190257107A1 (en) * 2016-06-08 2019-08-22 Murat DÍCLELÍ Torsional hysteretic damper
US10563417B2 (en) * 2016-06-08 2020-02-18 Murat DÍCLELÍ Torsional hysteretic damper
CN109057387A (zh) * 2018-07-25 2018-12-21 深圳市君盈建筑科技有限公司 一种混凝土浇筑钢框架
US11447970B2 (en) * 2020-08-04 2022-09-20 Simpson Strong-Tie Company Inc. Pinned base connection for a structural member
CN114087274A (zh) * 2021-09-21 2022-02-25 中国航空工业集团公司西安飞机设计研究所 一种预制振动可旋转连接结构

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