A Superposition Based Diffraction Technique to Study Site Effects in Earthquake Engineering

IF 1 Q3 GEOCHEMISTRY & GEOPHYSICS
Juan Gómez, J. Jaramillo, Mario Saenz, Juan Vergara
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引用次数: 4

Abstract

A method to study the response of surface topographies submitted to incident waves is presented. The method is based on the superposition of diffracted sources described in Jaramillo et al. (2013). Since the technique proceeds in the frequency domain in terms of the superposition of incident, reflected, and diffracted waves, it has been termed like a superposition based diffraction approach. The final solution resulting from the superposition approach takes the form of a series of infinite terms, where each term corresponds to diffractions of increasing order and of decreasing amplitude generated by the interactions between the geometric singularities of the scatterer. A detailed, step-by-step algorithm to apply the method is presented with regard to the simple problem of scattering by a V-shaped canyon. In order to show the accuracy of the method we compare our time and frequency domain results with those obtained from a direct Green’s function approach. We show that fast solutions with an error of the order of 6.0% are obtained.
基于叠加衍射技术研究地震工程场地效应
提出了一种研究入射波作用下表面形貌响应的方法。该方法基于Jaramillo等人(2013)所描述的衍射光源的叠加。由于该技术是在频率域中进行的,涉及到入射波、反射波和衍射波的叠加,因此它被称为基于叠加的衍射方法。由叠加方法得到的最终解采用一系列无限项的形式,其中每个项对应于由散射体的几何奇点之间的相互作用产生的增加顺序和减少幅度的衍射。针对v形峡谷散射的简单问题,给出了应用该方法的详细的、逐步的算法。为了证明该方法的准确性,我们将我们的时域和频域结果与直接格林函数方法得到的结果进行了比较。我们得到了误差约为6.0%的快速解。
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来源期刊
International Journal of Geophysics
International Journal of Geophysics GEOCHEMISTRY & GEOPHYSICS-
CiteScore
1.50
自引率
0.00%
发文量
12
审稿时长
21 weeks
期刊介绍: International Journal of Geophysics is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of theoretical, observational, applied, and computational geophysics.
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