期刊
EARTHQUAKE SPECTRA
卷 37, 期 1_SUPPL, 页码 1231-1282出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/87552930211018723
关键词
Ground motion model; ground motion prediction equation; NGA-East; CENA; stable continental region; earthquake; ground motion; hazard; CEUS; SCR
资金
- Pacific Earthquake Engineering Research Center (PEER), as part of the NGA-East research project
- U.S. Department of Energy (DOE)
- Electric Power Research Institute (EPRI)
- U.S. Geological Survey (USGS)
- U.S. Nuclear Regulatory Commission (NRC)
- NGA-East
This article presents an overview of the NGA-East research project, which aimed to develop a new ground motion characterization model for Central and Eastern North America. The project resulted in a set of 17 ground motion models for different parameters, with adjustments for source depth, hanging-wall effects, and hazard computations in the Gulf Coast Region. Innovative technologies were developed to increase transparency and repeatability in the GMC building process, with a focus on quantifying epistemic uncertainty objectively. The project underwent a comprehensive peer review process before its release.
In this article, we present an overview of the research project NGA-East, Next Generation Attenuation for Central and Eastern North America (CENA), and summarize the key methodology and products. The project was tasked with developing a new ground motion characterization (GMC) model for CENA. The final NGA-East GMC model includes a set of 17 median ground motion models (GMMs) for peak ground acceleration and velocity (PGA, PGV) and response spectral ordinates for periods ranging from 0.01 to 10 s. The NGA-East GMMs are applicable to horizontal components of ground motions on very hard rock, for the moment magnitude range of 4.0-8.2, and distances of up to 1500 km. The aleatory standard deviations of GMMs are also provided for site-specific analysis (single-station standard deviation) and for general probabilistic seismic hazard analyses (PSHA) applications (ergodic standard deviation). In addition, adjustment factors are provided for source depth and hanging-wall effects, as well as for hazard computations at sites in the Gulf Coast Region. During the course of the project, several innovative technologies were developed and implemented to increase the transparency and repeatability of the GMC building process. This involved expanding on a set of candidate median GMMs to define and capture an appropriate range of epistemic uncertainty in ground motions. We also developed a new approach for modeling the aleatory variability that was completely independent of the median GMMs. The development made extensive use of the CENA database but also borrowed data from other parts of the world when relevant and led to an integrated suite of models. Through this repeatable process, epistemic uncertainty could be quantified more objectively than before, relying less on expert opinion. The NGA-East project went through a comprehensive Seismic Senior Hazard Analysis Committee (SSHAC) Level 3 peer review process before its release.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据