G.Sudhakar, Saraboju Samathapriya 02 08 Every structure eventually fails during an earthquake because of its weak spots This weakness results from irregular structures which have discontinuities in their mass stiffness and geometry Unusual structures make up a disproportionately huge proportion of urban infrastructure One of the primary causes of building failures during earthquakes is vertical irregularities For instance buildings with flimsy storeys were the most notable buildings to collapse As a result the vertical irregularity significantly affects the structures seismic performance The dynamic behaviour of those building structures differs from a typical building due to heightwise modifications in stiffness and mass STAAD which stands for structural analysis refers to the style of any object that is stable under a specific loading The software called ETABS also known as EXTENDED 3d Model OF BUILDING SYSTEMS was created by Computer Systems or Structures Inc CSI The generalpurpose civil engineering programme SAP2000 is perfect for the design and analysis of any kind of structural system A practical and userfriendly objectbased modelling situation that simplifies and simplifying the engineering process can be used to model analyse design and optimise basic and sophisticated systems ranging from 2 to 3D of simple geometry to complex Finding the best approximation software to generate the results of structural analysis is the aim of this research Copyright (c) Journal of Science Engineering Technology and Management Science. All rights reserved 2026