| Popis: |
This study proposes a novel strategy for the investigation of displacement amplitude near and along a partially filled trapezoidal alluvial valley subjected to shear horizontal (SH) waves. The proposed hybrid method, combining finite element method with a Lamb series, was applied to study the effects of the irregular alluvial valley geometry, the incident angle of SH waves, a dimensionless frequency, and a filling ratio on displacements. Modified transfinite interpolation was used to obtain the coordinates of nodes and determine the sequence of node numbering in the inner finite region including the irregular alluvial valley. Furthermore, we present a detailed description of the amplification of displacement at the surface of the alluvial valley. According to the numerical results, the filling ratio plays an important role in the value of displacements, and variations in incident angles and dimensionless frequencies dominate the patterns of displacements. The results of numerical simulation are helpful to understand the site effects in irregular alluvial valleys. |
