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http://dx.doi.org/10.12989/sss.2013.12.2.157

Seismic response control of buildings with force saturation constraints  

Ubertini, Filippo (Department of Civil and Environmental Engineering, University of Perugia)
Materazzi, A. Luigi (Department of Civil and Environmental Engineering, University of Perugia)
Publication Information
Smart Structures and Systems / v.12, no.2, 2013 , pp. 157-179 More about this Journal
Abstract
We present an approach, based on the state dependent Riccati equation, for designing non-collocated seismic response control strategies for buildings accounting for physical constraints, with particular attention to force saturation. We consider both cases of active control using general actuators and semi-active control using magnetorheological dampers. The formulation includes multi control devices, acceleration feedback and time delay compensation. In the active case, the proposed approach is a generalization of the classic linear quadratic regulator, while, in the semi-active case, it represents a novel generalization of the well-established modified clipped optimal approach. As discussed in the paper, the main advantage of the proposed approach with respect to existing strategies is that it allows to naturally handle a broad class of non-linearities as well as different types of control constraints, not limited to force saturation but also including, for instance, displacement limitations. Numerical results on a typical building benchmark problem demonstrate that these additional features are achieved with essentially the same control effectiveness of existing saturation control strategies.
Keywords
structural control; seismic structural protection; active bracing systems; magnetorheological dampers; state dependent Riccati equation;
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Times Cited By KSCI : 3  (Citation Analysis)
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