Stochastic Seismic Response Sensitivity of Lifeline Systems

by C. H. Loh, Natl Central Univ, Taiwan,
A. H. -S. Ang, Natl Central Univ, Taiwan,



Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract:

The seismic response sensitivity of lifeline systems is examining using a probabilistic analysis based on random vibration theory. This analysis includes: (1) modelling the earthquake ground motion; (2) performing a pipeline response analysis; and (3) sensitivity analysis. In modelling the earthquake ground motion, the effect of local soil amplification, seismic source characteristics and travel path of the seismic waves are included in describing the stochastic ground motion. Spatial variation of seismic waves was also adopted in this model. Lifeline response analysis is performed in the frequency domain. The sensitivity of the root-mean-square response of pipelines as well as the relative ground motion are investigated. The study indicates that the uncertainties of both ground motion and system parameters may cause large variation on the system response which should not be neglected for an accurate reliability analysis of pipeline systems.

Subject Headings: Sensitivity analysis | Ground motion | Stochastic processes | Seismic tests | Dynamic structural analysis | Seismic waves | Seismic effects

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