Effects of a V-shaped canyon with a circular underground structure on surface ground motions under SH wave propagation
Effects of a V-shaped canyon with a circular underground structure on surface ground motions under SH wave propagation
复制标题
SH波传播下圆形地下结构V形峡谷对地表地震动的影响
DOI：
10.1016/j.soildyn.2019.105830
复制
发表时间：
2019-12-01
影响因子：
4
通讯作者：
Dai, Denghui
中科院分区：
文献类型：
--
作者：
Chen, Xin;Zhang, Ning;Dai, Denghui
The two-dimensional scattering and diffraction of plane SH waves by a symmetrical V-shaped canyon with a circular underground structure in a half-space is studied by using the wavefunction expansion method. The underground structure involved covers three common types: a cavity, a lined tunnel and a geological inclusion. By combining a domain decomposition strategy and the method of images, the wavefields in corresponding subregions are constructed in terms of infinite series of wavefunctions with unknown complex coefficients. The unknown coefficients are obtained by applying the Graf s addition formula and solving a matrix that represents the boundary conditions along subregion interfaces. To show effects of the surficial canyon and underground structure combined irregularity on ground motions, a parametric study is executed in both the frequency and time domain. A zone of ground motion amplification is found at the vicinity of the corner of the canyon with a lined tunnel buried nearby.
