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212 Ketter Hall, North Campus, Buffalo, NY 14260 civil.buffalo

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 #3 Instructor: Andrei M. Reinhorn P.Eng. D.Sc. Professor of Structural Engineering. Response of Structure with Damping Devices.

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212 Ketter Hall, North Campus, Buffalo, NY 14260 civil.buffalo

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  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 #3 Instructor: Andrei M. Reinhorn P.Eng. D.Sc. Professor of Structural Engineering

  2. Response of Structure with Damping Devices

  3. Fluid Damper

  4. Force Displacement of Structural System

  5. Spectra for Highly Damped Systems • MODIFICATION OF RESPONSE SPECTRA FOR HIGH DAMPING • aMAX = Sa = PSEUDO-ACCELERATION • aMAX = (f1+2f2) Sa ( f1=cos[tan-1(2)] ; f2-=sin[tan-1(2)] )

  6. Spectra for Highly Damped Systems

  7. Spectra for Highly Damped Systems

  8. Spectra for Highly Damped Systems

  9. Structural Influence of Damper

  10. Structural Influence of Damper

  11. Structural Influence of Damper

  12. Structural Influence of Damper

  13. Influence of Construction System

  14. Influence of Construction System

  15. Modification of effective properties

  16. Modification of effective properties

  17. Energy Dissipation Devices

  18. Viscoelastic Dampers

  19. Fluid Damper

  20. Viscous and Viscoelastic Devices - Behaviour

  21. Metalic Damper

  22. Friction Damper

  23. Hysteretic Damping Devices

  24. Additional Viscoelastic Dampers

  25. Additional Viscoelastic Dampers

  26. Additional Friction Dampers

  27. Additional Friction Dampers

  28. Additional Hysteretic Dampers

  29. Additional Hysteretic Dampers

  30. Comparison of Devices

  31. Comparison of Devices

  32. Comparison of Construction Efficency

  33. Example

  34. Example

  35. Equivalent Elastic Damped Systems

  36. Equivalent Elastic Damped Systems

  37. Equivalent Elastic Damped Systems

  38. Equivalent Elastic Damped Systems

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