Earthquakes and Structures

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Dynamic SSI effects on structural response of a R/C structure under vertical earthquake motion

  • Bas, Selcuk (Department of Civil Engineering, Faculty of Engineering, Architecture and Design, Bartin University)
  • Received : 2021.06.25
  • Accepted : 2021.08.30
  • Published : 2021.10.25
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Abstract

The present study focuses on estimating the effects of dynamic soil-structure-interaction (DSSI) on the earthquake response of a high-rise reinforced concrete (R/C) building with semi-ductile structural system having shear walls and column-beams under the vertical earthquake motion. For this aim, a set of comparative studies between the DSSI model with soft/firm soils and fixed support (FS) model under both only horizontal (H) and horizontal+vertical (H+V) earthquake motion are conducted. The soft (SS) and firm soil (FIS) properties specified with the standard penetration test are adopted for the DSSI model. Finite element model considerations are also detailed for the DSSI and FS models. The linear time-history analysis (LTHA) is performed to practically understand DSSI effects on structural response considering the vertical earthquake motion based the considered global monitoring parameters. The outcomes show that the DSSI model yields to more significant results than the FS model, but the most critical ones are obtained as the base shear force, the overturning moment and the base axial force. The vertical earthquake motion has a noticeable impact on the increase in the base axial force, the overturning moment and the top story vertical displacement. This study underlines that the consideration of the vertical earthquake motion and DSSI is required to make a reliable advanced estimation on structural damages and earthquake performance levels of R/C building structures.

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References

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