Research on ground motion amplification effect of ridge-valley topography considering "focus - medium - site"

ObjectiveThe "focus-medium-site" comprehensive analysis method is a pivotal advancement in the intricate and critical field of seismology, offering a more nuanced approach to understanding and mitigating seismic hazards. Traditional methods of seismic motion analysis have often relied on oversimplifications, ignoring the complex interplay between source characteristics, seismic wave propagation paths, and terrain conditions. This oversimplification can lead to inaccuracies in seismic hazard assessments, particularly in regions with rugged and varied landscapes, where the topographic influence on seismic waves can be substantial.MethodsThe proposed methodology addresses this limitation by meticulously dividing the study of seismic amplification effects into two interconnected models: the "focus-medium" model and the "medium-site" model. This split allows for a detailed and focused examination of different aspects of seismic wave behavior, enhancing accuracy and reliability of seismic hazard assessments. The "source-medium" model employs the finite difference