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首页> 外文期刊>Pure and Applied Geophysics >1-D Theoretical Modeling for Site Effect Estimations in Thessaloniki: Comparison with Observations
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1-D Theoretical Modeling for Site Effect Estimations in Thessaloniki: Comparison with Observations

机译：塞萨洛尼基场地效应估算的一维理论模型：与观测值的比较

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摘要

— We apply an algorithm based on the modal summation method to theoretically estimate the site effect at selected locations underlain by different geological formations within the city of Thessaloniki (Greece). Complete strong motion synthetics are constructed for all components of motion at each site, for a maximum frequency of 10 Hz. The anelastic, local 1-D velocity models are based on cross-hole data. Four point sources with different azimuths and distances from the city are used to compute the input signals. The theoretical amplification is estimated through spectral ratios of accelerograms obtained by the local 1-D over those obtained by the regional 1-D velocity model. The results from the numerical modeling are compared with those derived from experimental techniques, such as of Standard Spectral Ratio and Horizontal-to-Vertical Spectral Ratio, which had been applied to acceleration data recorded at the same sites. The comparison demonstrates that the theoretical amplifications based on known and simple subsurface geology can be used as a first-order estimate, while for cases of more complex geometries the use of at least 2-D modeling in site effects estimation is mandatory.
机译：—我们应用基于模态求和方法的算法，从理论上估算塞萨洛尼基（希腊）市内不同地质构造下的选定位置的场地影响。完整的强运动合成器可用于每个位置的所有运动组件，最大频率为10 Hz。非弹性局部一维速度模型基于跨孔数据。使用具有不同方位角和距城市距离的四个点源来计算输入信号。通过局部一维获得的加速度图与区域一维速度模型获得的加速度图的频谱比，可以估算出理论放大率。将数值建模的结果与实验技术得出的结果进行了比较，例如标准光谱比和水平与垂直光谱比，这些技术已应用于在相同位置记录的加速度数据。比较表明，基于已知和简单地下地质的理论放大可以用作一阶估计，而对于更复杂的几何形状，必须在场地效应估计中至少使用二维建模。

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  • 来源
    《Pure and Applied Geophysics》 |2001年第12期|2333-2347|共15页
  • 作者

    P. Triantafyllidis; P. M. Hatzidimitriou; P. Suhadolc;

  • 作者单位

    Aristotle University Geophysical Laboratory P.O. Box 111 GR-54006 Thessaloniki Greece. E-mail: trian@lemnos.geo.auth.gr takis@lemnos.geo.auth.gr;

    Aristotle University Geophysical Laboratory P.O. Box 111 GR-54006 Thessaloniki Greece. E-mail: trian@lemnos.geo.auth.gr takis@lemnos.geo.auth.gr;

    University of Trieste Department of Earth Sciences V. Weiss 1 I-34127 Trieste Italy. E-mail: suhadolc@dst.univ.trieste.it;

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    Key words: Modal summation modeling; spectral ratios; Thessaloniki (Greece).;

    机译：关键词：模态求和建模;光谱比;塞萨洛尼基（希腊）。;

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