caa a22 4500 445847107 CHVBK 20180317145402.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10518-010-9235-1 doi (NATIONALLICENCE)springer-10.1007/s10518-010-9235-1 Floor spectra of mixed base isolated structures [Elektronische Daten] [Ioannis Politopoulos, Hoan Pham] This work investigates the efficiency of mixed base isolation, combining passive isolation bearings with semi-active (SAC) devices, to reduce the floor spectral acceleration in the vicinity of the non-isolated modes' frequencies. Both analytical and experimental studies have been carried out. Analytical results of the behaviour of a multiple degree of freedom base isolated structure demonstrate the efficacy of the method. Though the considered controller is based on a reduced order model with only two degrees of freedom (2 DOF) without spillover compensation, the results show that, for the type of structures studied here, spillover effects are not considerable. An experimental study of a 2 DOF model of a base isolated structure equipped with a semi-active magneto-rheological (MR) damper has been carried out. Due to limitations of the experimental set-up, it has not been possible to obtain direct experimental evidence of the efficacy of SAC control to improve floor spectra. Nevertheless, based on the good agreement between analytical and experimental results which validate the considered MR model and control algorithm, numerical analyses of more relevant configurations illustrated the benefit of the utilization of such devices. Springer Science+Business Media B.V., 2010 Base isolation nationallicence Semi-active control nationallicence Floor spectra nationallicence Politopoulos Ioannis Commissariatà l'Energie Atomique, DEN/DANS/DM2S, CEA Saclay, 91191, Gif-sur-Yvette, France aut Pham Hoan Commissariatà l'Energie Atomique, DEN/DANS/DM2S, CEA Saclay, 91191, Gif-sur-Yvette, France aut Bulletin of Earthquake Engineering Springer Netherlands 9/4(2011-08-01), 1115-1135 1570-761X 9:4<1115 2011 9 10518 https://doi.org/10.1007/s10518-010-9235-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10518-010-9235-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Politopoulos Ioannis Commissariatà l'Energie Atomique, DEN/DANS/DM2S, CEA Saclay, 91191, Gif-sur-Yvette, France aut NATIONALLICENCE 700 1- Pham Hoan Commissariatà l'Energie Atomique, DEN/DANS/DM2S, CEA Saclay, 91191, Gif-sur-Yvette, France aut NATIONALLICENCE 773 0- Bulletin of Earthquake Engineering Springer Netherlands 9/4(2011-08-01), 1115-1135 1570-761X 9:4<1115 2011 9 10518 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer