چكيده لاتين :
In this paper, the semi active control of seismic vibrations of structures equipped with viscous dampers is studied. Due to
sensitivity of viscous dampers to velocity and fast loading in near-fault earthquakes, it is expected that these dampers to
be able to have acceptable operation in near-fault earthquakes. For a numerical example, a nine-story building is chosen.
The building is modeled whit three degrees of freedom at each story level including two lateral and one torsional degree
of freedom, By programming in MATLAB software, the dynamic behavior of the example building equipped whit
viscous dampers to earthquake excitations are studied and the responses of the building including maximum
displacement, acceleration, and shear of stories level have been evaluated. Finally, the results of controlled and
uncontrolled structures are compared. This comparison shows that the use of viscous dampers, make considerable
reduction in seismic response of structures subjected to near-fault earthquakes
