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In modern era passive control devices are used to improve the seismic response of structures
during large magnitude earthquakes. In this research an analytical study is carried out on commercial
FEM program SAP 2000 by modeling five, seven and nine storey RC frame structures. Response to
four earthquake ground motions on modeled frame structures is studied and is effectively controlled
by varying the characteristic properties of Fluid viscous dampers (FVD). Response in terms of
frequency, displacement, velocity, acceleration, storey drift, base shear and energy dissipation is
studied. Quantitatively in the modeled frames damage in terms of percentage change in global
stiffness and natural frequency is determined. Qualitatively damage in terms of performance levels as
per ATC-40 and FEMA-440 is considered. With an increase in Additional Stiffness Ratio of FVD
corresponding increase in natural frequency and reduction in dynamic response is observed. FVDs
significantly improve structural performance level of frames from Completely Damage to Immediate
Occupancy/Operational Level during large magnitude earthquakes.
Qasim Shaukat Khan, Asad Ullah Qasi, Muhammad Ilyas. (2013) Improved Seismic Response of RC Frame Structures by Using Fluid Viscous Dampers , Pakistan Journal of Engineering and Applied Sciences, Volume 13, Issue 1.
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