Mathematical modelling of semi-active control with application to building seismic protection
نویسندگان
چکیده
In this paper the semi-active control is achieved by a base isolation system. The magnetorheological dampers (MRD) hysteretic force is described by models based on nonlinear differential equation Bouc-Wen. The Bouc-Wen model is able to capture, in an analytical form, a range of shapes of hysteretic cycles which match the behavior of a wide class of nonlinear systems. In order to reduce the seismic response of protected structure, the ”balance logic” control strategy is proposed. The benefits of using semi-active base isolation systems are illustrated by a comparative numerical analysis of passive and semi-active control strategies, applied to a structure acted on by a synthetic seismic excitation derived from a given design response spectrum. For numerical simulation a Matlab-Simulink computer program was developed. M.S.C. 2010: : 34H05, 49K15, 93C15, 93C80
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