As high rises are built or designed for in areas of high seismic activities, it is critical to
examine their seismic responses using analysis code that reveals a more realistic view of
the behavior of these structures for their performance under strong seismic shaking. To
understand the seismic soil-structure interaction effects, a 33-story building and a 20-story
building were subjected to seismic response analysis using SSI-3D. To reflect the evolution
of SSI effects, analyses were performed for the cases with rigid base, flexible base with …