✦ LIBER ✦

SEMI-ACTIVE TUNED MASS DAMPERS FOR SEISMIC PROTECTION OF CIVIL STRUCTURES

✍ Scribed by ABÉ, M.

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 446 KB
Volume: 25
Category: Article
ISSN: 0098-8847
DOI: 10.1002/(sici)1096-9845(199607)25:7<743::aid-eqe579>3.0.co;2-s

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✦ Synopsis

A semi-active tuned mass damper (TMD) which is capable of adjusting initial displacement and damping is applied to seismic protection of structures. Control algorithms are derived in closed forms using perturbation analysis on modal properties of the sinigle degree of freedom (SDOF) structure/TMD system. Because perturbation solutions are given in a relatively simple form, the control algorithms are developed in a physically intuitive manner. In the first half of the paper, the control algorithms are introduced using numerical simulations of the impulse response. Then the algorithms are applied to seismic protection of civil structures using the strategy of multiple releasing and capturing of TMDs. The control strategy for seismic control is summarized in a flow chart. Numerical studies with the El Centro earthquake record show that t hLe proposed semi-active method has higher performance than conventional passive TMDs.

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