Effect of Torsional Ground Motions on Floor Acceleration Response in Flexible SMRF Buildings

ABSTRACT

This study investigates the effect of torsional components of the ground motions (TGM) on the floor acceleration response of flexible special moment-resisting frame (SMRF) buildings. For this purpose, computational models of three SMRF buildings were subjected to far-field ground motions with and without TGMs. Accordingly, the effect of TGM on the floor acceleration of structures with relatively short torsional period of vibration may be significant. Furthermore, TGMs may have adverse impact on rigid nonstructural components as it can be inferred from the amplifications in floor acceleration spectra, regardless of the flexibility of the parent structure.

KEYWORDS:

• Floor acceleration
• acceleration amplification
• nonstructural component
• torsional ground motion
• special moment resisting frame

Acknowledgments

This research did not receive any grant from funding agencies in the public, commercial, or not-for-profit sectors.