Seismic ground motion in micropolar elastic half-space

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• 作者：Maheshreddy Gade ; S.T.G. Raghukanth ; ^{raghukanth@iitm.ac.in" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Strong ground motion ; Micro-rotations ; Reduced micro polar continuum
• 刊名：Applied Mathematical Modelling
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：39
• 期：23-24
• 页码：7244-7265
• 全文大小：2236 K

文摘

In this article, analytic expressions for the frequency wave number spectra are derived for the displacement and rotational components at the ground surface of a micropolar elastic half-space. The ground motion is caused by buried sources described in terms of unit impulsive force and micro-moments. Closed-form analytic expressions for both plane strain and anti-plane strain conditions are established. In the sequel, Green’s functions for reduced micro polar half-space where the couple stresses are zero and the stress tensor is nonsymmetric are also presented. Numerical results are presented for anti-plane strain case. The derived expressions can be used to simulate rotational and displacement components of ground motion during earthquakes.