Hybrid Protective System for Seismic-Excited Bridges

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Title:	Hybrid Protective System for Seismic-Excited Bridges
Authors:	Yang, J. N.;Li, Z.;Wu, Jong-cheng;Kawashima, K.;Unjoh, S.
Contributors:	淡江大學土木工程學系
Date:	1994
Issue Date:	2011-10-23 20:36:19 (UTC+8)
Abstract:	Recently, several hybrid protective systems have been explored for applications to seismic-excited bridge structures. In particular, two types of aseismic hybrid protective systems have been shown to be quite effective: (i) rubber bearings and variable dampers (or actuators), and (ii) sliding bearings and actuators. In this paper, control methods are presented for these hybrid protective systems. The control methods are based on the theory of variable structure system (VSS) or sliding mode control (SMC). Emphasis is placed on the static (direct) output feedback controllers using only the information measured from a few sensors without an observer. Simulation results demonstrate that the control methods presented are robust with respect to system parametric uncertainties and the performance is quite remarkable. Sensitivity studies are conducted to evaluate the effectiveness of hybrid protective systems and passive sliding isolators for reducing the response of seismic-excited bridge structures. The advantages of each protective system are demonstrated by simulation results for a wide range of earthquake intensities.
Relation:	Proceedings 3rd U.S.-Japan Workshop on Protective Systems for Bridges,　p.1437-1451
Appears in Collections:	[Graduate Institute & Department of Civil Engineering] Proceeding

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