a recurrent switching technique for energy dissipaters in high damped structural systems

In some new approaches in seismic design of structures large energy dissipaters are needed to reduce lateral deformation of the system. mass isolation is one of these approaches in which damping devices are located in between two parts of a structural system with far apart natural frequencies (yuji et al., 2004). in this approach behavior of the system subjected to lateral excitation is unduly dependent on the characteristics of energy dissipaters. using nonlinearviscous dashpots or active controllable ones are considered typical approaches to improve damping characteristics of such systems (ziyaeifar, 2002; ziyaeifar et al., 2012). in this work, a recurrent switching technique for energy dissipaters in mass isolated systems is proposed that can be used for active and passive devices (viscous or frictional) to improve theireffectiveness in reducing structural responses during lateral excitation.