An Integrated Framework for the Probabilistic Evaluation and Multiscale Mapping of Liquefaction-Induced Settlement Exceedance Rate

In this work, an integrated framework is proposed for the probabilistic evaluation and multiscale mapping of liquefaction-induced settlements exceedance rate considering both the spatial variation of soil parameters and uncertain ground motions. The framework consists of three key components: empirical CPT-based models to evaluate the probability of liquefaction and liquefaction-induced settlement, a probabilistic method to estimate settlement exceedance rate in a given exposure time considering all possible ground motions at all hazard levels through a joint probability distribution of peak horizontal ground surface acceleration and moment magnitude of earthquake, and a multiscale random field model to map settlement exceedance over the study region considering the spatial variations of soil parameters and the influence of surficial geology. The framework is applied to assess liquefaction-induced settlement exceedance rate in an earthquake-prone region, resulting in consistent results with existing analysis and knowledge of the earthquake hazard in the study region.