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Post processing of cone penetration data for assessing seismic ground hazards, with application to the New Madrid Seismic Zone.

机译：圆锥渗透数据的后处理，以评估地震地面危害，并将其应用于新马德里地震带。

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摘要

The seismic cone penetration test (SCPTu) is the most efficient means for geotechnical site characterization and the evaluation of seismic ground hazards. In this thesis, software systems including ShearPro, ClusterPro, and InSituData, are developed to automate post processing of these SCPTu data. ShearPro is developed to automate the post-processing of the shear wave signals. ClusterPro uses the proposed three-dimensional cluster analysis approach for soil stratification. InSituData facilitates the post processing of penetration data for seismic ground hazards analysis. A new three-dimensional soil classification chart is also proposed in this thesis to help discern soil layers that may be subject to seismic ground hazards, such as loose liquefied sands and silty sands.; These methods are then applied to SCPTu data collected at previously-identifed paleoliquefaction sites located in the New Madrid Seismic Zone (NMSZ). For liquefaction evaluation, the cyclic stress ratio (CSR) is computed using site response analysis by DeepSoil and a measured profile of shear waves derived from the 30-m SCPTU soundings and deep suspension loggings in AR and TN. The natural resistance of the soil to liquefaction, termed the cyclic resistance ratios (CRRs), is evaluated based on both deterministic procedures and probabilistic procedures. Based on liquefaction evaluation results at selected paleoliquefaction sites, regional CRR criteria for liquefaction are developed for the NMSZ. As even the latest major earthquakes in NMSZ occurred nearly 200 years ago, aging effects might be an important factor to consider in utilizing the liquefaction criteria to assess the seismic parameters associated with the previous earthquakes. The aging effects in the NMSZ were investigated through large scale blast-induced liquefaction tests conducted in the NMSZ. Then a procedure to estimate seismic parameters associated with previous earthquakes is proposed. It utilizes both the liquefaction criteria based on SCPTu tests and the empirical attenuation relations developed for the corresponding regions. The approach is validated through data evaluation related to the 1989 Loma Prieta earthquakes in California and then applied to previous historic earthquakes in the NMSZ.
机译：地震锥渗透试验（SCPTu）是岩土工程现场表征和评估地震地面危害的最有效方法。在本文中，开发了包括ShearPro，ClusterPro和InSituData在内的软件系统来自动处理这些SCPTu数据。 ShearPro是为自动执行剪切波信号的后处理而开发的。 ClusterPro使用建议的三维聚类分析方法进行土壤分层。 InSituData促进了渗透数据的后处理，以进行地震地面危害分析。本文还提出了一种新的三维土壤分类图，以帮助识别可能受到地震地面危害的土壤层，例如松散的液化砂和粉质砂。然后将这些方法应用于在新马德里地震区（NMSZ）先前确定的古液化站点收集的SCPTu数据。为了进行液化评估，使用DeepSoil的场地响应分析以及从AR和TN的30 m SCPTU测深以及深部悬浮测井得出的剪切波实测轮廓，计算循环应力比（CSR）。基于确定性程序和概率性程序，评估了土壤对液化的自然抵抗力，即循环阻力比（CRR）。根据选定古液化场所的液化评估结果，为NMSZ制定了液化的区域CRR标准。由于甚至NMSZ地区最近的主要地震都发生在近200年前，因此老化效应可能是在利用液化标准评估与先前地震相关的地震参数时要考虑的重要因素。通过在NMSZ中进行的大规模爆炸诱发的液化试验研究了NMSZ中的老化效应。然后提出了一种估计与先前地震有关的地震参数的程序。它利用了基于SCPTu测试的液化标准和针对相应区域开发的经验衰减关系。该方法通过与1989年加利福尼亚州的Loma Prieta地震有关的数据评估得到验证，然后应用于NMSZ以前的历史地震。

著录项

  • 作者

    Liao, Tianfei.;

  • 作者单位

    Georgia Institute of Technology.;

  • 授予单位 Georgia Institute of Technology.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 515 p.
  • 总页数 515
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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