Date: 4/21/2021
Session Time: 3:45 PM to 4:45 PM Pacific
How Well Can We Assess Site Effects So Far?
In seismic hazard and risk analyses, the effects of near-surface geology on ground shaking need to be quantified as precisely as possible. Ergodic amplification equations in ground motion models (GMM) can only give an average estimate of amplification, and bias is expected in a posterior application at a specific site. Various approaches are currently available to quantify site-specific amplification. If ground-motion records are available at or near a target site, ergodic models can be calibrated to derive site-specific amplification function. Otherwise, ground response analyses (GRA) are carried out to characterize site response. In addition, the horizontal-to-vertical spectral ratio (HVSR) of either earthquake or ambient noise recordings has been proven to be a cost-effective approach in site-effects studies.
In this session, we invite studies dealing with different approaches to quantify site effects. Studies on how to improve our current practice in ground response estimation are particularly welcome, e.g., the search of optimal site characterization proxy (alternative or complementary to the time-averaged 30 m shear-wave velocity and/or the fundamental resonant frequency) to improve ergodic site response models; novel approaches to evaluate the attenuation of wave propagation; ground response analysis and its associated uncertainty; soil nonlinearity, numerical or empirical studies on 2D/3D site effects; and innovative application of the horizontal-to-vertical spectral ratio (HVSR) technique; and integration of site effects into seismic hazard analysis.
Conveners
Chuanbin Zhu, GFZ German Research Centre for Geosciences (chuanbin.zhu@gfz-potsdam.de)
Marco Pilz, GFZ German Research Centre for Geosciences (pilz@gfz-potsdam.de)
Yefei Ren, Institute of Engineering Mechanics, China Earthquake Administration (renyefei@iem.net.cn)
Fumiaki Nagashima, Disaster Prevention Research Institute, Kyoto University (nagashima.fumiaki.6v@kyoto-u.ac.jp)
Poster Presentations
| Participant Role | Details | Action |
|---|---|---|
| Submission | An Open-Source Site Database of Strong-Motion Stations in Japan: K-Net and KiK-Net | View |
| Submission | Seismic Site Response in the Binchuan Basin, Yunnan, China Inferred From Records at a Dense Linear Array | View |
| Submission | Testing Site-Proxy and Non-Linear Amplification Models Using Site-Specific Variability | View |
| Submission | The Applicability of Using HVSR to Evaluate Site-Effects, Verification of Vertical Arrays and Application for Stations in Western China | View |
| Submission | The Soft Soil Effect of Marine Soil on Ground Motion Parameters | View |
| Submission | Site Response Study in the Greater Boston Area With an Investigation of the Magnitude 3.6 Bliss Corner Earthquake of November 2020 | View |
| Submission | Regional Attenuation Estimates for California Using Coda Waves | View |
| Submission | Comparison of Site Amplifications Estimated Using Three Techniques in the Fort Worth Basin, Texas | View |
| Submission | Three-Dimensional S-Wave Velocity Model of the South San Francisco Bay Area Obtained From Microtremor Array Measurements and Horizontal to Vertical Spectral Ratio | View |
| Submission | Seismic and Liquefaction Hazard Maps for Four Western Tennessee Counties | View |
| Submission | An Update to the Global Geospatial Liquefaction Model With Uncertainty Propagation | View |
How Well Can We Assess Site Effects So Far? [Poster]
Description
Type: Poster
Date: 4/21/2021
Time: 3:45 PM to 4:45 PM Pacific