Vulnerability Assessment for Earthquake Liquefaction–Induced Settlements of an Embankment Using Gaussian Processes
Publication: ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering
Volume 4, Issue 2
Abstract
The major cause of earthquake damage to an embankment is the liquefaction of the soil foundation that induces ground-level deformations. The aim of this paper is to assess numerically the effect of the liquefaction-induced settlement of the soil foundation on a levee due to real earthquakes. The seismic vulnerability is evaluated in terms of analytical fragility curves constructed on the basis of nonlinear dynamic finite-element (FE) analysis. However, FE analysis can be expensive because of the very large number of simulations needed for an accurate assessment of the system failure behavior. This problem is addressed by building a Gaussian process (GP) emulator to represent the output of the expensive FE model. A comparison with the FE reference results suggests that the proposed GP model works well and can be successfully used as a predictive tool to compute the induced damage on the levee. Findings also illustrate clearly the importance and the advantages of an adequate definition of the input parameters to build the GP model.
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Acknowledgments
This work, within the SINAPS@ project, benefited from French state funding managed by the National Research Agency under program RNSR Future Investments bearing reference No. ANR-11-RSNR-0022-04. The research reported in this paper has been supported in part by the SEISM Paris Saclay Research Institute. The authors acknowledge accessing strong motion data through the Center for Engineering Strong Motion Data (CESMD), last visited on Aug 2017. The networks or agencies providing the data used in this report are the California Strong Motion Instrumentation Program (CSMIP) and the USGS National Strong Motion Project (NSMP).
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Published In
ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering
Volume 4 • Issue 2 • June 2018
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©2018 American Society of Civil Engineers.
History
Received: May 4, 2017
Accepted: Oct 18, 2017
Published online: Feb 14, 2018
Published in print: Jun 1, 2018
Discussion open until: Jul 14, 2018
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