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
  • E04H9/0237—Structural braces with damping devices
• • 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
  • E04H9/024—Structures with steel columns and beams

Definitions

• the invention subject to the application is related to a torsional hysteretic damper that has been designed for braced frames.
• the aim of the torsional hysteretic damper is to reduce displacement and the associated damage on structural elements, by dampening (dissipating) earthquake energy that impacts structures.
• Dampers dampen (dissipate) the kinetic energy that has been loaded on them .
• This force is referred to as the reaction force of the damper.
• Damping in hysteretic dampers is obtained by using a metal that will yield, develop plastic strain and act as a hysteretic energy-dissipating element.
• ADAS added damping and stiffness
• TADAS triangular-plate added damping and stiffness
• E-shaped and C-shaped elements are another type of plate-bending metallic dampers for Chevron-type bracing systems. Round-hole and double X-shaped dampers also belong to this class of dissipating elements. These two dampers also are of plate-bending type.
• Another type of plate-bending based damper is the Steel Slit Damper, fabricated from a standard structural wide-flange section with a number of slits cut from the web.
• Bucking-restraint brace is another type of energy dissipation element used in braced frames. I n a BRB the brace is encased in a mortar-filled steel tube, while being detached from the mortar using some 'un-bonding' agent.
• the overall assembly is an element in which the inner steel core is free to slide and thus free to deform axially independent of the outer section, while in bending their flexural resistance is added, producing a section stiff in flexure and thus strong against buckling.
• torsional hysteretic damper is a mechanical device designed to utilize torsional yielding of cylindrical energy dissipaters (EDs) made of ductile steel to dissipate the imposed energy through seismic movements in a structure.
• EDs cylindrical energy dissipaters
• Torsional hysteretic damper converts the translational motion imposed on it at its two connection points into twisting at the energy dissipaters which are designed to yield in torsion and dissipate energy.
• the invention subject to the application is related to a torsional hysteretic damper that has been designed for braced frames.
• the purpose of the torsional hysteretic damping device is to realize energy dissipation in steel cylindrical energy dissipaters under torsion through converting the translational movement at the mounting points of the device into twisting at the cylindrical energy dissipaters.
• the energy dissipater must not be bent while the translational motion is converted into twisting, so that the cylindrical energy dissipaters yield smoothly .
• Lateral supports are provided to prevent the energy dissipaters from bending . Description of the Drawings
• Figure 1 - I s the conceptual drawing of the placement of torsional hysteretic dampers on building frames.
• Figure 2- I s the perspective view of the torsional hysteretic damper
• Figure 3- I s the side view (y-z plane) of the torsional hysteretic damper
• Figure 4- I s the front view (x-z plane) of the torsional hysteretic damper, namely the S1 -S2 view of Figure 3.
• Figure 5- I s the S2-S2 view of Figure 3 of the torsional hysteretic damper.
• Figure 6- I s the schematic front view of the (a) torsional hysteretic damper in un- displaced condition and the (b) , (c) torsional hysteretic damper in displaced condition.
• Figure 7- I s the energy dissipation unit of the torsional hysteretic damper.
• Figure 8- I s the sliding and rotating mechanism of the slider block around the mounting shaft and inside the rail.
• Figure 9- I s the force-displacement curve of the frictionless torsional hysteretic damper under increasing circular shift.
• the invention subject to the application is related to a hysteretic torsion damper that has been designed for cross frames.
• the torsional hysteretic damper comprises;
• a support plate (3) which protects the energy dissipater against bending and which is welded to the base plate (8) ,
• a torsional restraint plate (4) which restricts the torsional movement at the distal ends of the cylindrical energy dissipaters (1 ) and which is connected to the base plate (8) ,
• connection plate (9) that can shift laterally by means of guide strips (1 1 ) ,
• a torsional restraint plate (4) that is provided with guide strips (1 1 ) screwed to the cover plate (10) from the other side so as to enable the connection plate (9) to move in the horizontal direction and to prevent inclinations of the supports in the plane,
• connection plateconnection plate The purpose of the torsional hysteretic damper (1 ) is to translate the translational movement at the end points of the arms (2) into a twisting at the cylindrical energy dissipaters. ( Figure 1 -6) The energy dissipater must not be bent while the translational motion is converted into twisting , so that the cylindrical energy dissipaters (1 ) yield smoothly over their constant-diameter region . The bending of the energy dissipaters (1 ) are prevented by means of the horizontal support plate (3) .
• Figure 3 shows the side view (y-z plane) of the torsional hysteretic damper.
• the torsional hysteretic damper is constituted from 1 9 parts and these parts have been described in detail above.
• the support plate (3) is welded to the base plate (8) .
• the base plate (8) is connected to the frame beam . Therefore the support plate (3) receives the shear force from the energy dissipater (1 ) and transfers this force to the base plate (8) .
• the shear force that has been transferred is the reaction force of the damper.
• the low friction bearing numbered 1 (1 7) is mounted to the connection points of the energy dissipater (1 ) and the support plate (3) in order for the energy dissipater ( 1 ) to perform a low friction twisting .
• a slider block (6) is attached to the end of the arm (2) by means of the cylindrical mounting shaft (7) .
• the slider block (6) that accom modates the slider pads (1 5) is made of steel and said block is in contact with the rail (5) by means of the low friction slider pads ( 1 5) .
• the rail (5) is formed of two plates. Each plate of the rail (5) is provided with thin stainless steel plates ( 13) coupled to by means of screws. The aim of these plates (13) is to form a sliding interface for low friction.
• the rail (5) is connected to the connection plate (9) . This plate (9) provides connection to the support.
• the connection plate (9) can shift laterally by means of guide strips (1 1 ) . Thereby the bending of the supports is prevented.
• the slider block (6) and rail (5) or the connection plate (9) does not comprise a connection piece between them
• the slider block (6) shown in Figure 6 and Figure 9, forms a roller-hinge type connection between the end points of the arm (2) and the rail (5) when it is brought together with guiding rails (5) .
• the reason for requirement of such a connection is the vertical movement that is formed as a result of the rotation of the arm (2) between the rail (5) and the slider block (6) .
• the guide strips ( 1 1 ) enable the connection plate (9) to move laterally and prevent out-of-plane bending.
• the guide strips ( 1 1 ) are screwed on one side to the torsional restraint plate (4) and on the other side to the cover plate (1 0) .
• Shaped stainless steel steel plates ( 1 2) screwed to the connection plate (9) that is in contact with the guide strips ( 1 1 ) via the low friction slider bands (1 6) have been provided to allow for low-friction sliding , connection plate.
• the torsional restraint plate (4) and the cover plate ( 1 0) that is shown in Figure 2 and Figure 3 are connected to the base plate (8) .
• the torsional restraint plate (4) and the cover plate ( 1 0) receives the forces on the guide strips ( 1 1 ) and transfer these forces to the base plate (8) and then to the beam .
• the horizontal force (x-direction) applied from the arm (2) to the rail (5) and from the rail (5) to the connection plate (9) is called the damping force of the damper and this force is cross transferred by means of the cross connected horizontal plate (1 9) .
• the torsional hysteretic damper may be formed of one or more energy dissipation units.
• a three dimensional view of the energy dissipation unit has been shown in Figure 7.
• Each energy dissipation unit comprises,
• the torsional hysteretic damper has been designed to provide a hysteretic damping force via the rotation and yielding of the cylindrical energy dissipater ( 1 ) due to the differential motion of the mounting points.
• the bending moments are transferred from the from the support to the frame beam .

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Environmental & Geological Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Buildings Adapted To Withstand Abnormal External Influences (AREA)
• Vibration Dampers (AREA)
• Vibration Prevention Devices (AREA)
• Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
• Bridges Or Land Bridges (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (2)

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• 2016
  • 2016-06-08 TR TR2016/07751A patent/TR201607751A2/tr unknown
• 2017
  • 2017-06-07 US US16/307,493 patent/US10563417B2/en active Active
  • 2017-06-07 WO PCT/TR2017/050253 patent/WO2018056933A2/en not_active Ceased
  • 2017-06-07 EP EP17853559.7A patent/EP3445928B1/en active Active
  • 2017-06-07 JP JP2018564191A patent/JP6991487B2/ja active Active

Non-Patent Citations (1)

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