Role of Multiple Liquid Tuned Mass Dampers in Tall Buildings

Abstract

High raised buildings with plan asymmetry are
highly vulnerable to seismic induced vibrations on account of 1)
large amount of base shear, 2) large lateral displacement and 3)
twist of each story. The asymmetry in the building plan can’t be
compromised due to the architectural requirements and the
buildings utilities. Many techniques are attempted to minimize
the base shear, lateral displacement and the twist using methods
such as base isolation techniques, tuned massed dampers and the
liquid tuned mass dampers. However, though the attempts are
found to be fruitful, they are expensive, un acceptable and
sometimes not feasible.
In this study the liquid tuned mass dampers are found more
suitable and which are modeled making use of the overhead
water tanks in buildings. The effect of Multiple Liquid Tuned
Mass Dampers on the unsymmetrical buildings is to be studied
in the present work. The study is carried-out on L-shape
building, T-shape building and U-shape and rectangular
building of 10, 15 stories height in different seismic zones using
E-Tabs. The structural analysis is to be carried using linear time
history analysis. It was found that with the increase in number
of water head tanks and dampers, the base shear increased, but
displacement decreased.