Hazard analysis of seismic submarine slope instability |
| |
| Authors: | Rafael Rodríguez-Ochoa Farrokh Nadim José M Cepeda Michael A Hicks Zhongqiang Liu |
| |
| Institution: | 1. Department of Geosciences, University of Oslo (UiO), Oslo, Norway;2. Norwegian Geotechnical Institute (NGI), Oslo, Norway;3. Norwegian Geotechnical Institute (NGI), Oslo, Norway;4. Faculty of Civil Engineering and Geosciences, Delft University of Technology (TU Delft), Delft, The Netherlands |
| |
| Abstract: | To assess the risk associated with a submarine landslide, one must estimate the probability of slope failure and its consequences. This paper proposes a procedure to estimate the probability of earthquake-induced submarine slope failure (hazard) based on probabilistic seismic hazard analyses, ground response analyses and advanced laboratory tests. The outcomes from these analyses are treated in a probabilistic framework, with analytical simulations using mathematical techniques such as the first-order reliability method, Monte Carlo simulation and Bayesian updating. Fragility curves of slope failure during the earthquake (co-seismic) and after the earthquake (post-seismic) were developed in this study, and were shown to provide a clear and well-organized procedure to estimate the annual failure probability of a submarine slope under earthquake loading. |
| |
| Keywords: | offshore geohazards submarine slopes earthquakes submarine landslides dynamic analyses advanced laboratory tests |
|
|
