Non-linear Dynamics Response of Base Isolated RC Building in High-Seismic Zone of India

Chapter 10

Abstract
Earthquakes pose a significant threat to reinforced concrete (RC)
buildings for G+20 with Terrace Floor, particularly in regions
classified as high seismic zones. Conventional fixed-base structures
directly transmit seismic forces from the ground to the
superstructure, often resulting in severe structural damage. Base
isolation is a modern seismic protection technique that decouples the
building from ground motion and significantly reduces seismic
response. This study investigates the nonlinear dynamic response of
a base isolated reinforced concrete building located in a high seismic
zone of India. A comparative analysis is conducted between a
conventional fixed-base RC building and a base isolated RC building
in G+20 with Terrace Floor . The structural models are developed
using advanced structural analysis software and subjected to
nonlinear time history analysis. Key response parameters such as
base shear, displacement, inter-storey drift, and acceleration are
evaluated. The results demonstrate that base isolation significantly
reduces seismic forces transmitted to the superstructure while
increasing overall flexibility. The study confirms that base isolation
systems are effective in enhancing structural performance and safety
in high seismic zones of India.
Keywords: Nonlinear Dynamic Analysis, Base Isolation System,
Reinforced Concrete Building, Seismic Response, High Seismic Zone,
Time History Analysis, Inter-storey Drift.