NGA project strong-motion database
NGA project strong-motion database
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DOI：
10.1193/1.2894831
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发表时间：
2008-02-01
影响因子：
5
通讯作者：
Silva, Walter
中科院分区：
文献类型：
--
作者：
Chiou, Brian;Darragh, Robert;Silva, Walter
NGA研究项目的一个关键组成部分是开发一个强震动数据库，其质量和内容都有所提高，可用于地面运动研究和工程实践。NGA数据库的开发是通过PEER中心的生命线计划执行的，来自工程和地震界的几个研究组织和许多个人的贡献。目前，该数据集包括来自173个浅地壳地震的3551个公开可用的多分量记录，震级从4.2到7.9不等。每个加速度时间序列已被校正和过滤，并在多个阻尼水平的伪绝对谱加速度已被计算的加速度时间序列的3个组件中的每一个。根据滤波器类型和滤波器转角频率确定了可用频谱频率的下限。对于NGA模型的开发，两个水平加速度分量进一步旋转，形成水平地面运动的方向无关的措施（GMRotI50）。除地面运动参数外，还编制了一份内容广泛的元数据清单，说明每项记录的记录条件。专家和NGA开发人员对NGA数据进行了系统的检查和审查。
A key component of the NGA research project was the development of a strong-motion database with improved quality and content that could be used for ground-motion research as well as for engineering practice. Development of the NGA database was executed through the Lifelines program of the PEER Center with contributions from several research organizations and many individuals in the engineering and seismological communities. Currently, the data set consists of 3551 publicly available multi-component records from 173 shallow crustal earthquakes, ranging in magnitude from 4.2 to 7.9. Each acceleration time series has been corrected and filtered, and pseudo absolute spectral acceleration at multiple damping levels has been computed for each of the 3 components of the acceleration time series. The lowest limit of usable spectral frequency was determined based on the type of filter and the filter corner frequency. For NGA model development, the two horizontal acceleration components were further rotated to form the orientation-independent measure of horizontal ground motion (GMRotI50). In addition to the ground-motion parameters, a large and comprehensive list of metadata characterizing the recording conditions of each record was also developed. NGA data have been systematically checked and reviewed by experts and NGA developers.