000010635 001__ 10635
000010635 005__ 20141205155747.0
000010635 04107 $$aeng
000010635 046__ $$k2008-10-12
000010635 100__ $$aLee, Tzu-Ying
000010635 24500 $$aExperimental and Analytical Study on a Nonlinear Isolated Bridge under Semiactive Control

000010635 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010635 260__ $$b
000010635 506__ $$arestricted
000010635 520__ $$2eng$$aThe semiactive control system applied to a nonlinear isolated bridge with a magneto-rheological (MR) damper controlled by an improved sliding mode control algorithm is successfully implemented and evaluated through a series of shaking table tests. In the past researches, numerical simulations revealed that structural control systems are effective in mitigating seismic responses for isolated bridges which exhibit nonlinear responses under near-field ground motions. This paper is aimed to show the practical implementation of the semiactive control system to a nonlinear isolated bridge. A two-story shear-type structure model made of steel plates is designed to imitate the nonlinear dynamic behavior of an isolated bridge. In particular, since the column plates are replaceable, next nonlinear test can be continued using the same model by only changing the steel plates. Compared to the control methods based on feedback of displacements and velocities, the used improved sliding mode control based on feedback of velocities and accelerations shows more practical application into real structures, because it is easier to measure acceleration than displacement during earthquakes. Through comparison between analytical and experimental results, the MR damper satisfactorily traces the demanded control force by the control algorithm and the response time histories agreed to each other well. The results verify the feasibility of semiactive control system for a nonlinear structure in practical implementation. Since the results also present that the semiactive control system has outstanding performance, the semiactive control system provides a valuable control method for mitigating seismic responses of nonlinear isolated bridges.

000010635 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010635 653__ $$aIsolated Bridge, Nonlinear Response, Semiactive Control, Sliding Mode Control 

000010635 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010635 720__ $$aLee, Tzu-Ying$$iKawashima, Kazuhiko$$iChen, Po-Chuan
000010635 8560_ $$ffischerc@itam.cas.cz
000010635 8564_ $$s1018114$$uhttps://invenio.itam.cas.cz/record/10635/files/11-0098.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 11-0098.
000010635 962__ $$r9324
000010635 980__ $$aPAPER