iJournals: International Journal of Software & Hardware Research in Engineering (IJSHRE) ISSN-2347-4890 Volume 9 Issue 8 August 2021 Sourabh Pandey; Sourabh Pandey; Sidharth Pastariya, Volume 9 Issue 8, pp 86-100, August 2021 Seismic Behavior of Symmetrical & Unsymmetrical Structure with Cantilever Section Sourabh Pandey Department of Civil Engineering, Shri aurobindo institute of science & technology, Indore, India, Email id- sp250494@gmail.com Anant Bhardwaj Assistant Professor, Department of Civil Engineering, Shri aurobindo institute of science Indore, India, Email id- anat.bhardwaj@sait.ac.in Sidharth Pastariya HOD, Department of Civil Engineering, Shri aurobindo institute of science Indore, India, Email id- siddharth.pastariya1@sait.ac.in Abstract— This project performance of the torsionally balanced and torsionally unbalanced structure also called as symmetrical and unsymmetrical structure. In this project the effort is made to study the effect of eccentricity between centre of mass (CM) and centre of stiffness (CR) on the performance of the buildings. Two buildings of storey (G+12) are used in this paper, likes Symmetrical with cantilever section and Unsymmetrical with cantilever section. The performance of a multi-storey framed building during study earthquake motions depends on the distribution of mass, stiffness, and strength in both the horizontal and vertical planes of the building. During earthquake there is strong earth shaking, hence earthquake resistant design of structures is required. As now day’s unsymmetrical structures with cantilever sections are used to utilize area and available space in very efficient way. So, it is required to study the seismic behavior of unsymmetrical structures with cantilever section. In such type of structures, the centre of mass of the buildings does not correspond with the centre of resistance. This leads to inordinate edge deformation and shear forces in the unsymmetrical structure compared to symmetrical structure. Hence, by reducing the difference between the centre of mass and centre of stiffness, torsion effects can be minimized. The Dynamic response of the building during the times of seismic irregularities depends on the stiffness characteristics of the building. The objective study is the comparison of sections used in large span unsymmetrical cantilever structures to minimize the effect of torsion. The study is primarily focused on the deflections of cantilevers of large spans under different loading conditions such as dead load, live load and seismic load. The study also focuses on, to identify an appropriate technique suitable for analysis of large span cantilevers with in unsymmetrical structure. Keywords— Cantilevers, seismic, Symmetrical Structure with cantilever section, unsymmetrical Structure with cantilever section, response-spectrum Analysis, ETABS.