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首页> 外文会议>Coupled site and soil-structure interaction effects with application to seismic risk mitigation >HYBRID SIMULATION OF SEISMIC WAVE PROPAGATION IN LATERALLY INHOMOGENEOUS MEDIA
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HYBRID SIMULATION OF SEISMIC WAVE PROPAGATION IN LATERALLY INHOMOGENEOUS MEDIA

机译：横向非均质介质中地震波传播的混合模拟

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摘要

The main aim of this work is to develop, validate and applied in simulation study an efficient hybrid approach to study 2D seismic wave propagation in local multilayered geological region rested on inhomogeneous in depth half-space with a seismic source. Plane strain state is considered. The vertically varying of the soil properties in the half space is modelled by a set of horizontal flat isotropic, elastic and homogeneous layers. The finite local region is with nonparallel layers and with a free surface relief. The hybrid computational tool is based on the analytical wave number integration method (WNIM) and the numerical boundary integral equation method (BIEM). The WNIM is applied considering the bedrock model to compute the input signals for the laterally varying part where the signals are obtained by BIEM at a set of sites. The numerical simulation results reveal that the hybrid method is able to demonstrate the sensitivity of the obtained synthetic signals to the seismic source properties, to the heterogeneous character of the wave path and to the relief peculiarities of the local stratified geological deposit.
机译：这项工作的主要目的是开发，验证并将其应用到模拟研究中，这是一种有效的混合方法，用于研究二维半圆形地震波在局部多层地质区域中的传播，该区域位于具有地震源的不均匀深度半空间中。考虑平面应变状态。半空间中土壤特性的垂直变化是通过一组水平的各向同性，弹性和均质的水平层来模拟的。有限的局部区域具有不平行的层和自由的表面起伏。混合计算工具基于解析波数积分法（WNIM）和数值边界积分方程法（BIEM）。在考虑基岩模型的情况下应用WNIM，以计算横向变化部分的输入信号，其中BIEM在一组位置处获取信号。数值模拟结果表明，该混合方法能够证明所获得的合成信号对地震震源特性，波道的非均质特征以及局部分层地质沉积物的特征的敏感性。

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