...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Measured vs. predicted site response at the Garner Valley Downhole Array considering shear wave velocity uncertainty from borehole and surface wave methods
【24h】

Measured vs. predicted site response at the Garner Valley Downhole Array considering shear wave velocity uncertainty from borehole and surface wave methods

机译：考虑钻孔和表面波方法的剪切波速度不确定性的Garner Valley井下阵列的实测与预测站点响应

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper compares measured and predicted site response at the Garner Valley Downhole Array (GVDA) using a wide range of shear wave velocity (Vs) profiles developed from both borehole methods and inversion of surface wave data. Only low amplitude ground motions, resulting in approximately linear-viscoelastic site response between the downhole accelerometer and the surface accelerometers, were considered in this study. Thus, uncertainties associated with the small-strain Vs profiles used for site response predictions play a considerable role in attempting to match the recorded site response and its associated variability. Prior to our study, two borehole Vs profiles extending into rock were available for the site. However, their predicted/theoretical transfer functions (TTFs) were quite different and in poor agreement with the measured/empirical transfer functions (ETFs). These differences provided motivation to collect and interpret an extensive set of active-source and passive-wavefield surface wave measurements in an attempt to develop deep Vs profiles for the site that might be used to more accurately model the measured site response and its associated variability. Suites of non-unique Vs profiles developed from inversion of the surface wave data visually exhibited considerable differences, yet their predicted TTFs matched the measured ETFs very well. These results provide further evidence that surface wave dispersion data and horizontal-to-vertical spectral ratio curves represent an experimental “site signature” that can be used as a quantitative means of assessing whether candidate Vs profiles are appropriate for use in site response analyses.
机译：本文使用从钻孔方法和地表波数据反演得到的大范围剪切波速度（Vs）曲线，比较了Garner Valley井下阵列（GVDA）的实测和预测站点响应。在这项研究中，仅考虑了低振幅的地面运动，从而导致井下加速度计和地面加速度计之间的线性粘弹性场响应。因此，与用于站点响应预测的小应变Vs轮廓相关的不确定性在尝试匹配记录的站点响应及其关联的可变性方面起着相当重要的作用。在我们进行研究之前，有两个延伸到岩石中的钻孔Vs剖面可供现场使用。但是，它们的预测/理论传递函数（TTF）完全不同，并且与实测/经验传递函数（ETF）不一致。这些差异为收集和解释广泛的有源源和无源波场表面波测量提供了动力，从而试图为该站点开发深Vs剖面，该剖面可用于更准确地对测得的站点响应及其相关的可变性建模。由表面波数据反演产生的非唯一Vs轮廓套件在视觉上显示出显着差异，但它们的预测TTF非常匹配测得的ETF。这些结果提供了进一步的证据，表明表面波频散数据和水平与垂直光谱之比曲线代表实验“位置特征”，可以用作评估候选Vs轮廓是否适合用于位置响应分析的定量手段。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号