Discrepancy Metrics and Sensitivity Analysis of Dynamic Soil Response

Zeghal, Mourad; Goswami, N K; Manzari, Majid T.; Kutter, Bruce L.

doi:10.1061/9780784481479.012

Cited by 2 publications

(2 citation statements)

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“…A number of metrics have been used by researchers to assess differences among dynamic time histories (e.g., accelerations), ranging from a simple vector norm to the Sprague and Geers metric (Geers 1984) which identifies magnitude and phase difference components, along with others. A brief overview of these metrics and some of the associated Zeghal et al (2018). This article uses a new approach (Zeghal et al 2018).…”

Section: Difference Metricsmentioning

confidence: 99%

“…A brief overview of these metrics and some of the associated Zeghal et al (2018). This article uses a new approach (Zeghal et al 2018). The difference d ij between two corresponding acceleration time histories a i ¼ a i (t) and a j ¼ a j (t) of two different test replicas i and j is quantified using a normalized mean squared deviation (MSD):…”

Section: Difference Metricsmentioning

confidence: 99%

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Difference and Sensitivity Analyses of the LEAP-2017 Experiments

Goswami

Zeghal

Kutter

et al. 2019

Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading

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The experimental results of LEAP (Liquefaction Experiments and Analysis Projects) centrifuge test replicas of a saturated sloping deposit are used to assess the sensitivity of soil accelerations to variability in input motion and soil deposition. A difference metric is used to quantify the dissimilarities between recorded acceleration time histories. This metric is uniquely decomposed in terms of four difference component measures associated with phase, frequency shift, amplitude at 1 Hz, and amplitude of frequency components higher than 2 Hz (2 + Hz). The sensitivity of the deposit response accelerations to differences in input motion amplitude at 1 Hz and 2 + Hz and cone penetration resistance (used as a measure reflecting soil deposition and initial grain packing condition) was obtained using a Gaussian process-based kriging. These accelerations were found to be more sensitive to variations in cone penetration resistance values than to the amplitude of the input motion 1 Hz and 2 + Hz (frequency) components. The sensitivity functions associated with this resistance parameter were found to be substantially nonlinear. 132 N. Goswami et al.

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Section: Difference Metricsmentioning

confidence: 99%

Section: Difference Metricsmentioning

confidence: 99%