What question did this study set out to answer?

This study aims to evaluate and compare the seismic performance of RC buildings using different isolation systems.

June 8, 2026Open Access

Comparative Seismic Performance of Rc Buildings With Hdrb, Lrb, and Fixed Base Systems Using Etabs

Key Points

This study aims to evaluate and compare the seismic performance of RC buildings using different isolation systems.
Evaluated a 10-storey RC building with fixed-base, HDRB, and LRB isolation systems using ETABS.
Conducted Response Spectrum and Nonlinear Time History analyses according to IS standards.
Compared seismic metrics such as fundamental time period, base shear, and inter-storey drift.
Base isolation significantly increased the fundamental time period and reduced inter-storey drift.
LRB exhibited better performance with higher energy dissipation compared to HDRB.
Both HDRB and LRB systems improved seismic resilience under Indian conditions.

Abstract

AbstractThis study evaluates the seismic performance of a 10-storey RC building with fixed-base, HDRB, andLRB isolation systems using ETABS, based on IS 1893 (Part 1): 2016 and IS 456: 2000. ResponseSpectrum and Nonlinear Time History analyses showed that base isolation significantly increased thefundamental time period and reduced base shear, inter-storey drift, peak floor acceleration, and roofdisplacement. LRB exhibited slightly better seismic performance due to higher energy dissipation, whileHDRB provided smoother response behaviour. The results confirm that base isolation is an effectivemethod for improving the seismic resilience of RC buildings under Indian conditions.

Comparative Seismic Performance of Rc Buildings With Hdrb, Lrb, and Fixed Base Systems Using Etabs

Key Points

Abstract

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