Sensitivity of predicted liquefaction-induced lateral displacements from the 2010 Darfield and 2011 Christchurch earthquakes (2013)

Type of Content
Conference Contributions - OtherPublisher
University of Canterbury. Civil and Natural Resources EngineeringCollections
Abstract
Liquefaction-induced lateral spreading in Christchurch and surrounding suburbs during the recent Canterbury Earthquake Sequence (2010-2011) caused significant damage to structures and lifelines located in close proximity to streams and rivers. Simplified methods used in current engineering practice for predicting lateral ground displacements exhibit a high degree of epistemic uncertainty, but provide ‘order of magnitude’ estimates to appraise the hazard. We wish to compare model predictions to field measurements in order to assess the model’s capabilities and limitations with respect to Christchurch conditions. The analysis presented focuses on the widely-used empirical model of Youd et al. (2002), developed based on multi-linear regression (MLR) of case history data from lateral spreading occurrence in Japan and the US. Two issues arising from the application of this model to Christchurch were considered: • Small data set of Standard Penetration Test (SPT) and soil gradation indices (fines content FC, and mean grain size, D50) required for input. We attempt to use widely available CPT data with site specific correlations to FC and D50. • Uncertainty associated with the model input parameters and their influence on predicted displacements. This has been investigated for a specific location through a sensitivity analysis.
Citation
Robinson, K., Cubrinovski, M., Bradley, B.A. (2013) Sensitivity of predicted liquefaction-induced lateral displacements from the 2010 Darfield and 2011 Christchurch earthquakes. Wellington, New Zealand: New Zealand Society for Earthquake Engineering Annual Conference (NZSEE2013), 26-28 Apr 2013.This citation is automatically generated and may be unreliable. Use as a guide only.
ANZSRC Fields of Research
40 - Engineering::4005 - Civil engineering::400502 - Civil geotechnical engineering04 - Earth Sciences::0403 - Geology::040312 - Structural Geology
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Comparison of Actual and Predicted Measurements of Liquefaction-Induced Lateral Displacements during 2010 Darfield and 2011 Christchurch Earthquakes
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Sensitivity of predicted liquefaction-induced lateral displacements from the 2010 Darfield and 2011 Christchurch earthquakes
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