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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 (12) Metallic Dampers Instructor: Andrei M. Reinhorn P.Eng. D.Sc. Professor of Structural Engineering. - PowerPoint PPT Presentation
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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 VibrationsLecture #5
Devices and Models (12)Metallic Dampers
Instructor:
Andrei M. Reinhorn P.Eng. D.Sc.Professor of Structural Engineering
Metallic Hysteretic Dampers
Models and Implemented Devices
Hysteretic Damping Devices
Flexural Plate Device
Max: stresses at all sections1) Mx = P x2) Wx = (b/L )x t2 /63) fx = 6 P / t2 (b/L)Stress constant at all sections:x
(b/L)x
t
L
P
Stresses in Plate Dampers
ADAS - [Flour-Daniel Ltd]
ADAS Device in Structure
ADAS - [Flour-Daniel Ltd]
Application
Flexural Conical Beam Device
T-ADAS - Metalic Damper
T-ADAS Device
T-ADAS Device
Sivaselvan-Reinhorn ModelMCEER Report #MCEER-99-0018
uKaKaR H 10Spring 1 : Elastic Spring
Ry*
Ry*
aK0
(1-a)K0
R
aK0u
R*
u
Spring 2 : Hysteretic Spring
2*
1*
*
0 sgn1 uRRRKK
n
yH
Model used in IDARC2DVer.5.0
- 1 5 0 . 0
- 1 0 0 . 0
- 5 0 . 0
0 . 0
5 0 . 0
1 0 0 . 0
1 5 0 . 0
- 6 . 0 - 4 . 0 - 2 . 0 0 . 0 2 . 0 4 . 0 6 . 0
- 1 5 0 . 0
- 1 0 0 . 0
- 5 0 . 0
0 . 0
5 0 . 0
1 0 0 . 0
1 5 0 . 0
- 6 . 0 - 4 . 0 - 2 . 0 0 . 0 2 . 0 4 . 0 6 . 0
- 8 0 . 0
- 6 0 . 0
- 4 0 . 0
- 2 0 . 0
0 . 0
2 0 . 0
4 0 . 0
6 0 . 0
8 0 . 0
1 0 0 . 0
1 2 0 . 0
1 4 0 . 0
- 6 . 0 - 4 . 0 - 2 . 0 0 . 0 2 . 0 4 . 0 6 . 0
( a ) L a r g e N ( B i l i n e a r ) ( b ) N = 5 ( c ) A s y m m e t r i c Y i e l d
- 1 5 0 . 0
- 1 0 0 . 0
- 5 0 . 0
0 . 0
5 0 . 0
1 0 0 . 0
1 5 0 . 0
- 6 . 0 - 4 . 0 - 2 . 0 0 . 0 2 . 0 4 . 0 6 . 0
- 1 5 0 . 0
- 1 0 0 . 0
- 5 0 . 0
0 . 0
5 0 . 0
1 0 0 . 0
1 5 0 . 0
- 6 . 0 - 4 . 0 - 2 . 0 0 . 0 2 . 0 4 . 0 6 . 0
- 1 5 0 . 0
- 1 0 0 . 0
- 5 0 . 0
0 . 0
5 0 . 0
1 0 0 . 0
1 5 0 . 0
- 6 . 0 - 4 . 0 - 2 . 0 0 . 0 2 . 0 4 . 0 6 . 0
( d ) = 0 . 1( a ) S t i f f n e s s D e g r a d a t i o n
( = 2 )( b ) S t r e n g t h D e g r a d a t i o n
( = 0 . 5 , = 0 . 3 , u l t = 1 0 )
- 1 5 0 . 0
- 1 0 0 . 0
- 5 0 . 0
0 . 0
5 0 . 0
1 0 0 . 0
1 5 0 . 0
- 6 . 0 - 4 . 0 - 2 . 0 0 . 0 2 . 0 4 . 0 6 . 0
- 2 5 0 . 0
- 2 0 0 . 0
- 1 5 0 . 0
- 1 0 0 . 0
- 5 0 . 0
0 . 0
5 0 . 0
1 0 0 . 0
1 5 0 . 0
2 0 0 . 0
2 5 0 . 0
- 6 . 0 - 4 . 0 - 2 . 0 0 . 0 2 . 0 4 . 0 6 . 0
- 1 5 0 . 0
- 1 0 0 . 0
- 5 0 . 0
0 . 0
5 0 . 0
1 0 0 . 0
1 5 0 . 0
- 6 . 0 - 4 . 0 - 2 . 0 0 . 0 2 . 0 4 . 0 6 . 0
( c ) S l i p( = 0 . 1 , R s = 0 . 2 5 , = 0 . 4 )
( d ) G a p C l o s i n g(
g a p = 2 , N g a p = 1 . 5 , = 0 . 2 5 )( i ) C o m b i n a t i o n o f ( e ) , ( f )
a n d ( g )
Sivaselvan & Reinhorn, 1999
Mathematical Model for Plate Damper
Triangular Plate Metallic Element
Triangular Plate Element
Behavior of Metallic Damper
Modeling Durability of Metallic Dampers
Modelling of Structures with Additional
Hysteretic Dampers
Additional Hysteretic Dampers
Japanese Web Shear Device
Lead Extrusion Device
Lead Extrusion
Lead Joint Damper
Flexural Beam Device
U Strip Device
Yielding Steel Bracing System
Tyler, 1985, New Zealand
Torsional Beam DeviceNew Zealand, Rocking Bridge Peers
Friction (Hysteretic) Dampers
Models and Implemented Devices
Recommended