Published Paper Details:

Earthquakes represent one of the most devastating natural phenomena, capable of causing catastrophic damage to structures and significant loss of life. The design and analysis of multi-storey buildings to withstand seismic forces is therefore a critical aspect of modern structural engineering. ETABS (Extended Three-dimensional Analysis of Building Systems), developed by Computers and Structures, Inc. (CSI), has emerged as the industry-standard software for the seismic analysis and design of building structures worldwide. This article provides a comprehensive overview of seismic analysis methodologies applied to multi-storey buildings using ETABS. It covers the theoretical foundations of earthquake engineering, the various analysis methods available -- static, response spectrum, and time history -- and their practical implementation within the ETABS environment. Key parameters such as base shear, storey drift, storey displacement, and mode shapes are discussed with reference to codal provisions including IS 1893, ASCE 7, and Eurocode 8. Results from a representative case study of a G+10 reinforced concrete building demonstrate the advantages and limitations of each method.