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    Probabalistic Prediction of Severity of Liquefaction Surface Manifestation Using Geotechnical and Geospatial Models

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    Date
    2017-08-08
    Author
    Maurer, Brett W.
    van Ballegooy, Sjoerd
    Bradley, Brendon A.
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    Abstract
    The severity of liquefaction manifested at the ground surface is a pragmatic proxy of damage potential for various infrastructure assets, making it particularly useful for hazard mapping ,land-use planning, and preliminary site-assessment. Towards this end, the recent Canterbury, New Zealand, earthquakes, inconjunction with others, have resulted in liquefaction case-history data of unprecedented quantity and quality, presenting a unique opportunity to develop fragility-functions for liquefaction-induced ground failure. Accordingly, this study analyzes nearly 10,000 liquefaction case studies from 23 earthquakes to develop functions that express the probability of exceeding specific severities of liquefaction surface-manifestation as a function of five different liquefaction damage measures (LDMs), of which three are based on geotechnical data and two are based on freely available geospatial data. The proposed functions have the same functional form, such that end-users can easily select the model coefficients for the particular damage state and LDM of their choosing. It should be noted that these functions are not to be used to predict lateral spreading, which requires LDMs other than those assessed herein. Lastly, the proposed functions are preliminary and subject to further development. In this regard, several thrusts of ongoing investigation are mentioned.
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    http://hdl.handle.net/1773/39749
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    • Department of Civil and Environmental Engineering Faculty Papers [10]

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