Ground Motion Effect of River Valley Sites Based on FLAC3D Numerical Simulation

The study of ground motion effects at river valley sites is an important guide to site selection and seismic design. In this paper, FLAC3D numerical simulation used explore the influencing factors a site. By selecting four with different input spectrum characteristics, intensities, slope angles depth-to-width ratios, orthogonal test forms are designed determine calculation conditions, analysis conducted. obtains ranking for top section slope, bottom locations main factor spectral characteristics motion; also overall amplification effect pattern trapezoidal shows that smallest largest.