1. 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

2. Control Devices in Civil Engineering Structures

3. Classification of PED

7. Modeling of Experimental Data

10. Viscous and Viscoelastic Devices - Behaviour Viscous: F = C (dx/dt)

11. Viscous Fluid Dampers  Models and implemented Devices

12. Viscous Fluid Damper

15. Fluid Damper - Taylor Devices

16. Structure with Fluid Dampers

17. Brace with Fluid Damper

19. Response of Fluid Damper in Frame

20. Fluid Dampers Models with Stiffening

21. or

22. Maxwell Model dependency on frequency

23. Model of fluid damper

24. Other Fluid Dampers Models

25. Fluid Dampers Models Solution of fluid dampers modeled as fractional derivatives is done in the frequency domain since derivatives are product of the function by the argument at the power of order of derivative (approximately) Makris, 1990

26. Typical response of fluid damper

28. Solid Viscoelastic Dampers  Models and Implemented Devices

29. Viscoelastic Dampers

30. Viscoelastic Damper - 3M Corp.

31. Viscoelastic Solid Dampers

32. Viscoelastic Models

35. General Viscoelastic Model

36. Extended Viscoelastic Model

37. Viscoelastic Models

38. Shear Storage Modulus

39. Shear Loss Modulus

40. Effectivness vs Temperature Viscoelastic Dampers

41. Effectiveness in System Viscoelastic Dampers

42. Energy Balance

44. Additional Viscoelastic Dampers

46. Design Chart For Visco- Elastic Dampers

47. Viscous Fluid Wall Dampers

48. Sumitomo Construction Fluid Viscoelastic Wall

49. Viscous Walls -Sumitomo Industries Ltd

50. Independence of Position

53. Pot Fluid Damper (GERB) (Huffman,1985)

54. Fluid Viscoelastic Dampers Gerb Fluid Damper

56. Hysteretic Dampers  Models and Implemented Devices