• Rajeshwari M S
• Dr. B S Jayashankar Babu

It is a well known fact that earthquake is a disaster causing event. Recent trend of buildings are slender in nature and hence their behavior under lateral loads are quite random or probabilistic. Hence there is a need to improve lateral stiffness of the structure. With many practical studies, it is evident that use of structural systems improves the stiffness of the building. Considering 20 story building(60m in height), an attempt is made to analyse and stiffen the structure with Rigid Frame system, Core system and Outrigger structural system for different zones at soil type III. Models are analysed using Response Spectrum Method in E-TABS V18.0.0 software package as per IS 1893( Part 1):2016 code provisions. Rigid frame, Core system and Outrigger structural systems at various positions are modeled and analysed and the results of top story displacement, Base shear, and time period are obtained and compared at all the seismic zones to arrive at the structurally efficient lateral load resisting system for the plan considered.

Core system, Outrigger structural system, Response Spectrum Method, Rigid Frame system and Structural systems.

"Seismic analysis of 20 story reinforced concrete structure under core, outrigger system and belt-truss", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 7, page no.371-380, July-2020, Available :http://www.jetir.org/papers/JETIR2007346.pdf

"Seismic analysis of 20 story reinforced concrete structure under core, outrigger system and belt-truss", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 7, page no. pp371-380, July-2020, Available at : http://www.jetir.org/papers/JETIR2007346.pdf