Soil-structure interaction of tall buildings with basement in Santiago, Chile
DOI:
https://doi.org/10.4067/S0718-28132019000100066Keywords:
Tall building, Deep basement, Dynamic soilstructure interactionAbstract
There are currently 935 buildings with heights of 200 m or more around the world. The Costanera Center Tower, in Chile, with 300 m of height is an example of this type of construction in South America. Researchers and seismic design codes recognize that dynamic soil-structure interaction (DSSI) have significant effects on the seismic response of tall buildings. Previous studies have shown the need of considering the depth of basement, the retaining wall flexibility, the characteristics of the soil around the building base, the structure’s height, and the characteristics of the input ground motion. This study examines the seismic response of a tall building with deep basement considering soil-structure interaction. The dynamic behaviour of this tall building is evaluated using non-linear finite element analysis. The main results discussed in this paper focus on the lateral seismic pressures on the building’s basement walls, the differences between the free-field and the foundation-level ground motions, and the dynamic structural response in terms of the shear force distribution. These results highlight the importance of considering DSSI effects in the seismic response of tall buildings with Deep basements, and help on improving our understanding of the seismic performance of such buildings.
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