Investigation on Seismic Performance of Outrigger Structure For High Rise Building

Abstract

As of today's growing population, tall buildings are now being built, with various sorts of high-rise buildings
in terms of lateral resisting systems. Outriggers are one of the most effective lateral load resisting techniques
for increasing the stiffness and seismic capabilities of a building. Shake table tests are effective ways of
determining a building's seismic capacity in seismic engineering. Due to the limited size and capacity of
existing shake tables, scale structural models will be required. However, to know the real effect of a building
and because of the limited capacity of shake table, we can use software to analyze building's seismic
performance. In this paper, an investigation of the seismic performance of past experimental work has been
performed in the software Etab, and to validate the result same method has been applied. A software tool
was used to do modal analysis on the prototype structure, and the experimental data was compared with
the software results to acquire a better understanding of the building's seismic performance. In past
experimental study, free vibration test was carried out to know the time period of the structure. In order to
observe the same result, modal analysis is performed in software to find out modal period and the damping
ratio was calculated manually. After comparing the software result and experimental values of time period
and damping, it was clear that the software application and the experimental findings were in good
concordance.