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۱INTELLIGENT CONTROL OF SEISMIC VIBRATIONS OF STRUCTURES WITH FRICTION DAMPERS EQUIPPED WITH PIEZOELECTRIC
نویسنده(ها): ،
اطلاعات انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله، سال
تعداد صفحات: ۸
In this paper semi active control of seismic vibrations of structures equipped with smart frictional dampers is studied . In order to control the frictional resistance force at the sliding surface of the dampers the piezoelectric materials are used . the piezoelectric materials provide the adjusting on–surface normal force by actuation<\div>

۲Seismic Vibration Control of Strategic Equipments Using Semi–Active Sliding Isolation Systems
نویسنده(ها): ، ،
اطلاعات انتشار: چهارمین کنفرانس بین المللی مقاوم سازی، سال
تعداد صفحات: ۱۱
Critical and sensitive non–structural components need to be protected against various types of earthquake excitations. For these purposes, using proper control strategies is inevitable for protecting them against the seismic vibrations. This study examines the performance of a semi–active control strategy for the equipments installed on the frictional isolator. In order to control the frictional resistance level at the interface of sliding system, the piezoelectric materials are used. The piezoelectric materials adjust this threshold force by providing varying compression axial forces. The LQR controller is used as the control algorithm. For a numerical simulation, a ten–story building frame with the equipment located at the middle story is considered. The main structure as the primary system is modeled as a shear frame that has one lateral degree of freedom at each story level and the equipment is modeled as the secondary system. Results demonstrate that piezoelectric based smart frictional isolator has significant effects in reducing the seismic responses of the secondary system in comparison with the passive frictional isolator<\div>
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