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首页> 外文期刊>Seismological research letters >A Generic Velocity Profile for Basin Sediments in California Conditioned on VS30
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A Generic Velocity Profile for Basin Sediments in California Conditioned on VS30

机译:加利福尼亚州盆地沉积物的通用速度曲线,VS30

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摘要

The near-surface soil layers of sedimentary basins play a critical role in modifying the amplitude, frequency, and duration of earthquake ground shaking and, thus, are an important factor to consider in ground-motion simulations, the development of site amplification factors, and earthquake hazard evaluations on a regional scale. In this article, we present a sediment velocity model (SVM) that translates V-S30 and a proxy that describes the stiffness of the near-surface sediments into a 1D velocity profile suitable for use in wave-propagation-based ground-motion predictions. We develop the SVM based on the statistics of 914 measured velocity profiles. We conduct a validation study and show that the SVM can satisfactorily predict both 1D shear-wave velocity profiles and linear site amplification factors. Lastly, we propose two correlations that enable the stochastic realization of the SVM profiles.
机译:沉积盆地的近表面土层在改变地震地面摇动的幅度,频率和持续时间内发挥着关键作用,因此是在地面运动模拟中考虑的重要因素,现场扩增因子的发展和 地震危害区域规模评估。 在本文中,我们介绍了一种沉积物速度模型(SVM),其转换V-S30和描述近表面沉积物的刚度,该沉积物进入适合于基于波传播的地面运动预测的1D速度分布。 我们根据914测量速度配置文件的统计来开发SVM。 我们进行验证研究,表明SVM可以令人满意地预测1D剪切波速度谱和线性部位扩增因子。 最后,我们提出了两种相关性,使得SVM轮廓的随机实现能够。

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