Comparing Existing and Novel Methodologies for Estimating Risk of Liquefaction Triggering and Damage
Publication: Lifelines 2022
ABSTRACT
Estimating the probability that liquefaction will occur at a given site is a critical first step in calculating the seismic risk on lifelines and structures, such as lateral spreading and ground settlement. Several methodologies for estimating this probability exist. The majority of these methods are based on estimating the factor of safety against liquefaction throughout the soil profile and condensing that information into an index. The probability of liquefaction-induced damage can then be estimated qualitatively (e.g., “severe” liquefaction damage corresponds an index threshold) or quantitatively through fragility curves developed using databases of liquefaction observations. In this paper, we compare novel and traditional methods. We apply cloud analysis to a soil profile at a hypothetical site in San Fernando. This approach consists of performing multiple nonlinear site response analyses and synthesizing their results. The advantages and disadvantages of each method for the design and analysis of lifeline systems are also discussed.
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Lifelines 2022
Pages: 135 - 143
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Published online: Nov 16, 2022
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