• Vaishnavi Rakesh Ambatkar

The paper presents a simple computer-based push-over analysis technique for performance-based design of building frameworks subject to earthquake loading. The technique is based on the conventional displacement method of elastic analysis. , the standard elastic and geometric stiffness matrices for frame elements (beams, columns, etc.) are progressively modified to account for nonlinear elastic–plastic behavior under constant gravity loads and incrementally increasing lateral loads . Various approaches in nonlinear static analysis were developed to study the performance of a building. Push over analysis is one of the popular methods to determine the performance level of the building. Based on the results obtained from the pushover analysis whether collapse occurs at member or structure level can be identified. In this analysis both symmetric and asymmetric structures with plan irregularity are compared. Symmetric structures have centre of mass coinciding with the centre of rigidity and the torsion effect in such structures occurs out of accidental eccentricity whereas in asymmetric structures have irregular distribution of mass and stiffness and its centre of mass and centre of rigidity do not coincide and hence causes the torsional effect on the structures which is one of the most important factor influencing the seismic damage of the structure. A simple linear comparison based on eccentricity is also carried out for the structures. Structures with asymmetric distribution of mass and stiffness undergoes torsional motions during earthquake. Equivalent loads and wind loads are considered for the analysis of the structure. The analysis of the structural models is carried out using ETABS 2015 software.

Pushover analysis , stiffness , earthquake , torsion , nonlinear static analysis

"Torsional Effect In The Pushover Based Seismic Analysis of Building", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 7, page no.a439-a442, July-2022, Available :http://www.jetir.org/papers/JETIR2207052.pdf

"Torsional Effect In The Pushover Based Seismic Analysis of Building", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 7, page no. ppa439-a442, July-2022, Available at : http://www.jetir.org/papers/JETIR2207052.pdf