Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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FORM-based Structural Reliability Analysis of Dynamical Active Control System

동적능동제어시스템의 FORM기반 구조신뢰성해석

  • Ok, Seung-Yong (Department of Civil, Safety and Environmental Engineering, Hankyong National University)
  • 옥승용 (한경대학교 토목안전환경공학과)
  • Received : 2013.01.04
  • Accepted : 2013.02.16
  • Published : 2013.02.28
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Abstract

This study describes structural reliability analysis of actively-controlled structure for which random vibration analysis is incorporated into the first-order reliability method (FORM) framework. The existing approaches perform the reliability analysis based on the RMS response, whereas the proposed study uses the peak response for the reliability analysis. Therefore, the proposed approach provides us a meaningful performance measure of the active control system, i.e., realistic failure probability. In addition, it can deal with the uncertainties in the system parameters as well as the excitations in single-loop reliability analysis, whereas the conventional random vibration analysis requires double-loop reliability analysis; one is for the system parameters and the other is for stochastic excitations. The effectiveness of the proposed approach is demonstrated through a numerical example where the proposed approach shows fast and accurate reliability (or inversely failure probability) assessment results of the dynamical active control system against random seismic excitations in the presence of parametric uncertainties of the dynamical structural system.

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