Evaluation of the Performance of Fluid Dampers in Controlling the Seismic-Induced Response of Structures

Jahromi Shirazi, Mohammad Mahdi | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 39999 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Rahimzadeh Rofooei, Fayaz
  7. Abstract:
  8. Natural disasters, such as earthquakes and hurricanes, can strike without warning, resulting in a range of destruction from structural damage to loss of life. For this reason, research on structural control, which provides a new basis for design of structural systems against winds, earthquakes, waves, and traffic loadings, become of interest in civil engineering. This thesis focuses on using fluid dampers as a passive energy dissipation device. Viscous Fluid Dampers (VFD) are the most commonly used passive energy dissipation devices that are manufactured in various forms. However, the orifice type of Viscous Fluid Damper (VFD) is considered for structural applications. In this thesis, the performance of VFD in reducing the earthquake induced response of structures is investigated using nonlinear VFD. A number of earthquake records and three dimensional structural models with different eccentricity are selected in order to evaluate the performance of VFD. SAP2000 ver. 12 software is selected for modeling and linear or nonlinear static and time history analyses. The results obtained show that the VFDs have an efficient performance in reducing the top displacement, story shear, inter-story drift and story torsion in all cases. Although the amount of reduction was not significant in some cases, but in general the performance of viscous fluid dampers is acceptable and they can effectively protect the buildings against earthquakes.

  9. Keywords:
  10. Passive Control ; Viscous Fluid Damper ; Nonlinear Time History Analysis ; Added Damping ; Three Dimensional Modeling

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