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Seismic performance of structures incorporating magnetorheological dampers with pseudo‐NEGATIVE STIFFNESS
Pseudo‐negative stiffness control is a control scheme that is aimed to track, in a passive energy dissipation fashion, a target spring force with negative stiffness when possible. In this study, it is proved that systems with pseudo‐negative stiffness control have the property of homogeneity even though they are nonlinear systems. The harmonic response analyses reveal that the pseudo‐negative stiffness reduces the resonant frequency of the system. Seismic response spectrum analyses show that both acceleration and displacement can be reduced with the pseudo‐negative stiffness control when the structural period is long and damping level is not high. Pseudo‐negative stiffness control of a five‐story base‐isolated structure incorporating magnetorheological damper is studied through analytical and real‐time hybrid test methods. The results show that displacement and acceleration responses with pseudo‐negative stiffness control are lower than those with passive‐off control and isolator alone, whereas the displacement response with pseudo‐negative stiffness is greater than the passive‐on control. Copyright © 2011 John Wiley & Sons, Ltd.
Seismic performance of structures incorporating magnetorheological dampers with pseudo‐NEGATIVE STIFFNESS
Pseudo‐negative stiffness control is a control scheme that is aimed to track, in a passive energy dissipation fashion, a target spring force with negative stiffness when possible. In this study, it is proved that systems with pseudo‐negative stiffness control have the property of homogeneity even though they are nonlinear systems. The harmonic response analyses reveal that the pseudo‐negative stiffness reduces the resonant frequency of the system. Seismic response spectrum analyses show that both acceleration and displacement can be reduced with the pseudo‐negative stiffness control when the structural period is long and damping level is not high. Pseudo‐negative stiffness control of a five‐story base‐isolated structure incorporating magnetorheological damper is studied through analytical and real‐time hybrid test methods. The results show that displacement and acceleration responses with pseudo‐negative stiffness control are lower than those with passive‐off control and isolator alone, whereas the displacement response with pseudo‐negative stiffness is greater than the passive‐on control. Copyright © 2011 John Wiley & Sons, Ltd.
Seismic performance of structures incorporating magnetorheological dampers with pseudo‐NEGATIVE STIFFNESS
Wu, Bin (Autor:in) / Shi, Pengfei (Autor:in) / Ou, Jinping (Autor:in)
Structural Control and Health Monitoring ; 20 ; 405-421
01.03.2013
17 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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