Effectiveness of Configuration of Shear Wall on Performance of a Torsionally Irregular Structure During an Earthquake


Authors : Siya Kiran Fol Desai; Dr. Ganesh Hegde

Volume/Issue : Volume 7 - 2022, Issue 8 - August

Google Scholar : https://bit.ly/3IIfn9N

Scribd : https://bit.ly/3TosnI5

DOI : https://doi.org/10.5281/zenodo.7033677

When the mass of on one side of a building is more than the mass on the other side, the heavier side of the building tends to move more as compared to the lighter side under the influence of seismic forces. The horizontal displacement of the floors that occurs in such cases, in addition to rotation is termed as torsion. Excessive torsional behavior severely affects the building during an earthquake. Torsion should be minimized by ensuring symmetry in plan. However, it may not be always possible to have a structure with uniformly distributed mass and uniformly placed lateral load resisting systems. Mostly, structures are designed without considering effects of dynamic forces. But the negligence of dynamic forces sometimes proves to be the cause of disaster, particularly in case of earthquake. In this study, a torsionally irregular structure subjected to the 2001 Bhuj earthquake, is tested with different configurations of shear walls, namely, rectangular, C, T, and I, to derive an arrangement which ensure maximum safety to a torsionally irregular structure during the occurrence of the earthquake. The models are analyzed in ETABS 18 software using the time history data of Bhuj earthquake and are compared based on horizontal displacement, story drift, base shear, eccentricity, and torsional irregularity. It has been concluded that the model with I-shaped shear wall arrangement is the most ideal for the structure.

Keywords : Torsion; Shear Wall; Eccentricity; Time History; Bhuj Earthquake; Irregularity

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