212 ketter hall, north campus, buffalo, ny 14260 civil.buffalo
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212 Ketter Hall, North Campus, Buffalo, NY 14260 www.civil.buffalo.edu Fax: 716 645 3733 Tel: 716 645 2114 x 2400 Control of Structural Vibrations Lecture #5 Devices and Models (1) Instructor: Andrei M. Reinhorn P.Eng. D.Sc. Professor of Structural Engineering. - PowerPoint PPT PresentationTRANSCRIPT
212 Ketter Hall, North Campus, Buffalo, NY 14260 www.civil.buffalo.edu
Fax: 716 645 3733 Tel: 716 645 2114 x 2400
Control of Structural VibrationsLecture #5
Devices and Models (1)
Instructor:
Andrei M. Reinhorn P.Eng. D.Sc.Professor of Structural Engineering
Control Devices in Civil Engineering Structures
Classification of PED
Modeling of Experimental Data
Viscous and Viscoelastic Devices -
Behaviour
Viscous:F = C (dx/dt)
Viscous Fluid Dampers
Models and implemented Devices
Viscous Fluid Damper
Viscous Fluid Damper
Viscous Fluid Damper
Fluid Damper - Taylor Devices
Structure with Fluid Dampers
Brace with Fluid Damper
Response of Fluid Damper in Frame
Fluid Dampers Models with Stiffening
Fluid Dampers Models with Stiffening
or
Maxwell Model dependency on
frequency
Model of fluid damper
Other Fluid Dampers Models
Fluid Dampers ModelsSolution of fluid dampers modeled as fractional derivatives is done in the frequency domain since derivatives are product of the function by theargument at the power of order of derivative (approximately)
Makris, 1990
Typical response of fluid damper
Solid Viscoelastic Dampers
Models and Implemented Devices
Viscoelastic Dampers
Viscoelastic Damper - 3M Corp.
Viscoelastic Solid Dampers
Viscoelastic Models
Viscoelastic Models
General Viscoelastic Model
Extended Viscoelastic Model
Viscoelastic Models
Shear Storage Modulus
Shear Loss Modulus
Effectivness vs Temperature
Viscoelastic Dampers
Effectiveness in SystemViscoelastic Dampers
Energy Balance
Energy Balance
Additional Viscoelastic Dampers
Additional Viscoelastic Dampers
Design ChartFor Visco-Elastic Dampers
Viscous Fluid Wall Dampers
Sumitomo Construction Fluid Viscoelastic Wall
Viscous Walls -Sumitomo Industries
Ltd
Independence of Position
Pot Fluid Damper (GERB)
(Huffman,1985)
Fluid Viscoelastic DampersGerb Fluid Damper
Hysteretic Dampers
Models and Implemented Devices