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首页> 外文期刊>Bulletin of earthquake engineering >A reliable computerized litho-morphometric model for development of 3D maps of Topographic Aggravation Factor (TAF): the cases of East Mountain (Utah, USA) and Port au Prince (Haiti)
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A reliable computerized litho-morphometric model for development of 3D maps of Topographic Aggravation Factor (TAF): the cases of East Mountain (Utah, USA) and Port au Prince (Haiti)

机译：一种可靠的计算机化的Litho-orphormometric模型，用于发展地形加重因子（TAF）的3D地图：东山（犹他州，美国）和奥伊氏港（海地）

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A reliability analysis was performed of a model capable of computing Topographic Aggravation Factors (TAF) for real topographic features using a digital elevation model. This model is a module in the SiSeRHMap hybrid model that, by a metamodeling process, computes frequency depending maps (multispectral) of acceleration response taking into account the topographic effect. The model is described by a structure comparable to a series-parallel circuit problem that solves for the response of each given x, y, z map point by scaling the 1D seismic response by the TAF in the frequency domain (each a component of the series circuit). The TAF is dependent on two coupled factors (the parallel components): (1) the 3D shape of the surface and (2) the stiffness of an "equivalent uniform relief". Reliability analyses were performed on two different areas each characterized by complex topographic features. The first case modelled the East Mountain area (Utah, USA), where a detailed topographic effects study was conducted. A comparison between the TAFs developed in this study and the estimated Median Reference Method and Standard Spectral Ratio results calculated from the recorded ground motions indicated good agreement between the numerical and experimental results. The second case performed a comparison-parametric analysis of two nearby topographic features located in Port-au-Prince, Haiti. For this case, the complete SiSeRHMap model was applied by utilizing stratigraphic and topographic modules. The results clearly confirm the role of the 3D-topographic surface in the seismic site response and the reliability of SiSeRHMap in predicting it.
机译：使用数字高度模型对能够计算实际地形特征的地形加重因子（TAF）的模型进行可靠性分析。该模型是SiserhMap混合模型中的模块，通过元模型过程，计算频率取决于地形效应的加速度响应的映射（多光谱）。该模型由与串联电路问题相当的结构来描述，该方法通过在频域中的TAF缩放TAF来解决每个给定x，y，z地图点的响应来解决每个给定x，y，z地图点的响应（每个组件的每个组件）电路）。 TAF取决于两个耦合因子（并联组件）：（1）表面的3D形状和（2）“等效均匀释放”的刚度。在两个不同的区域上进行可靠性分析，每个区域都以复杂的地形特征为特征。第一种案例建模了东山区（USA，USA），其中进行了详细的地形效果研究。本研究开发的TAFS与估计的中值参考方法和从记录的地面运动计算的标准光谱比率结果表明了数值和实验结果之间的良好一致性。第二种案例进行了位于海地港口 - 奥尼特港的附近附近地形特征的比较 - 参数分析。对于这种情况，通过利用地层和地形模块来应用完整的Siserhmap模型。结果清楚地证实了3D地形表面在地震现场反应中的作用以及Siserhmap在预测中的可靠性。

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