scholarly journals Broadband (0–5 Hz) Fully Deterministic 3D Ground‐Motion Simulations of a Magnitude 7.0 Hayward Fault Earthquake: Comparison with Empirical Ground‐Motion Models and 3D Path and Site Effects from Source Normalized Intensities

2019 ◽  
Vol 90 (3) ◽  
pp. 1268-1284 ◽  
Author(s):  
Arthur J. Rodgers ◽  
N. Anders Petersson ◽  
Arben Pitarka ◽  
David B. McCallen ◽  
Bjorn Sjogreen ◽  
...  
Keyword(s):  
Ground Motion ◽  
Site Effects ◽  
Motion Models ◽  
Ground Motion Simulations ◽  
Empirical Ground ◽  
Ground Motion Models

Testing non-linear amplification factors used in ground motion models

2021 ◽  
Author(s):  
Karina Loviknes ◽  
Danijel Schorlemmer ◽  
Fabrice Cotton ◽  
Sreeram Reddy Kotha
Keyword(s):  
Ground Motion ◽  
Site Effects ◽  
Ground Motions ◽  
Site Amplification ◽  
Building Codes ◽  
Linear Amplification ◽  
Motion Models ◽  
Earthquake Predictability ◽  
Non Linear ◽  
Ground Motion Models

<p>Non-linear site effects are mainly expected for strong ground motions and sites with soft soils and more recent ground-motion models (GMM) have started to include such effects. Observations in this range are, however, sparse, and most non-linear site amplification models are therefore partly or fully based on numerical simulations. We develop a framework for testing of non-linear site amplification models using data from the comprehensive Kiban-Kyoshin network in Japan. The test is reproducible, following the vision of the Collaboratory for the Study of Earthquake Predictability (CSEP), and takes advantage of new large datasets to evaluate <span>whether or not</span> non-linear site effects predicted by site-amplification models are supported by empirical data. The site amplification models are tested using residuals between the observations and predictions from a GMM based only on magnitude and distance. When the GMM is derived without any site term, the site-specific variability extracted from the residuals is expected to capture the site response of a site. The non-linear site amplification models are tested against a linear amplification model on individual well-record<span>ing</span> stations. Finally, the result is compared to building codes where non-linearity is included. The test shows that for most of the sites selected as having sufficient records, the non-linear site-amplification models do not score better than the linear amplification model. This suggests that including non-linear site amplification in GMMs and building codes may not yet be justified, at least not in the range of ground motions considered in the test (peak ground acceleration < 0.2 g).</p>

A Bayesian model for truncated regression for the estimation of empirical ground-motion models

2020 ◽  
Vol 18 (14) ◽  
pp. 6149-6179
Author(s):  
Nicolas Martin Kuehn ◽  
Tadahiro Kishida ◽  
Mohammad AlHamaydeh ◽  
Grigorios Lavrentiadis ◽  
Yousef Bozorgnia
Keyword(s):  
Ground Motion ◽  
Bayesian Model ◽  
Truncated Regression ◽  
Motion Models ◽  
Empirical Ground ◽  
Ground Motion Models

Modeling nonlinear site effects in physics-based ground motion simulations of the 2010–2011 Canterbury earthquake sequence

2020 ◽  
Vol 36 (2) ◽  
pp. 856-879 ◽  
Author(s):  
Christopher A de la Torre ◽  
Brendon A Bradley ◽  
Robin L Lee
Keyword(s):  
Wave Propagation ◽  
Ground Motion ◽  
Site Effects ◽  
Ground Motions ◽  
Site Amplification ◽  
Earthquake Sequence ◽  
Response Analysis ◽  
Site Specific ◽  
Ground Motion Simulations ◽  
Empirical Ground

This study examines the performance of nonlinear total stress one-dimensional (1D) wave propagation site response analysis for modeling site effects in physics-based ground motion simulations of the 2010–2011 Canterbury, New Zealand earthquake sequence. This approach explicitly models three-dimensional (3D) ground motion phenomena at the regional scale, and detailed site effects at the local scale. The approach is compared with a more commonly used empirical VS30-based method of computing site amplification for simulated ground motions, as well as prediction via an empirical ground motion model. Site-specific ground response analysis is performed at 20 strong motion stations in Christchurch for 11 earthquakes with 4.7≤ MW≤7.1. When compared with the VS30-based approach, the wave propagation analysis reduces both overall model bias and uncertainty in site-to-site residuals at the fundamental period, and significantly reduces systematic residuals for soft or “atypical” sites that exhibit strong site amplification. The comparable performance in ground motion prediction between the physics-based simulation method and empirical ground motion models suggests the former is a viable approach for generating site-specific ground motions for geotechnical and structural response history analyses.

Effects of different empirical ground motion models on seismic hazard maps for North Iceland

2021 ◽  
pp. 106513
Author(s):  
Milad Kowsari ◽  
Benedikt Halldorsson ◽  
Jónas þ. Snæbjörnsson ◽  
Sigurjón Jónsson
Keyword(s):  
Seismic Hazard ◽  
Ground Motion ◽  
Hazard Maps ◽  
Seismic Hazard Maps ◽  
Motion Models ◽  
Empirical Ground ◽  
Ground Motion Models
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