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
Abstract :
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
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
