SEMI-ACTIVE CONTROL OF BUILDING STRUCTURES SUBJECTED TO NEAR-FAULT EARTHQUAKE EXCITATIONS USING VISCOUS DAMPERS

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 whitviscous 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

کلیدواژه ها:

near-fault ، semi-active ، LQR controller