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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Empirical correlations between cumulative absolute velocity and spectral accelerations from NGA ground motion database
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Empirical correlations between cumulative absolute velocity and spectral accelerations from NGA ground motion database

机译：NGA地面运动数据库中累积绝对速度与频谱加速度之间的经验相关性

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摘要

Considering multiple ground motion intensity measures is important in seismic hazard analysis and ground motion selection process. Using the NGA strong motion database and recently developed ground-motion prediction models, empirical correlations are developed between cumulative absolute velocity (CAV) and spectral accelerations (Sa) at periods from 0.01 to 10 s. The CAV-Sa correlations at long periods are significantly influenced by rupture distance due to modification of the frequency content and duration of the acceleration time history through travel path. Similarly, the presence of strong velocity pulses in near-source ground motions also affects the correlations at moderate to long periods. On the other hand, the correlations are not particularly sensitive to the earthquake magnitude, orientation of the ground-motion recordings, selection of ground-motion prediction models and local site conditions. Piecewise linear fitting equations are provided to quantify the correlations for various cases. The application of the CAV-Sa correlations in ground motion selection process is also discussed.
机译：在地震危险性分析和地震动选择过程中，考虑多种地震动强度措施非常重要。使用NGA强运动数据库和最近开发的地震动预测模型，可以在0.01到10 s的时间段内累积绝对速度（CAV）和频谱加速度（Sa）之间建立经验相关性。由于频率含量和通过行进路径的加速时间历程的持续时间的变化，破裂距离显着影响了长时间内的CAV-Sa相关性。同样，近源地震动中强速度脉冲的存在也会影响中长期的相关性。另一方面，相关性对地震震级，地震动记录的方向，地震动预测模型的选择以及当地情况的敏感度不是特别敏感。提供了分段线性拟合方程，以量化各种情况下的相关性。还讨论了CAV-Sa相关性在地面运动选择过程中的应用。

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    《Soil Dynamics and Earthquake Engineering》 |2012年第2012期|p.229-236|共8页
  • 作者

    Gang Wang; Wenqi Du;

  • 作者单位

    Hong Kong University of Science and Technology Department of Civil and Environmental Engineering Clear Water Bay Kowloon Hong Kong SAR China;

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