• Lakshmi V
• Shivakumar N V

This article presents an outline of the base isolation techniques with special emphasis for reducing earthquake forces on the structures. The effects of base isolation on structures are briefly discussed. Base isolation is an anti-seismic design strategy that can reduce the effect of earthquake ground motion by isolating the superstructure from the foundation. The important feature of the base isolation technique is that it introduces flexibility to the structure. In this present study, a G+9 storey RC irregular structure is considered and dynamic analysis has been carried out by Time History analysis using ETABS V15.1 software as per IS-1893:2002(Part-I). The lead rubber bearing is used as the seismic isolation device which is provided at the base of the structure and the masonry infills are modelled as compression diagonal struts which are assumed to be pin-jointed at both ends. Equivalent diagonal strut method was considered to design the masonry struts as per IS-1893:2016(Part-I). For the Time History analysis BHUJ earthquake ground motion records was considered. This present study tends to demonstrates how the structure efficiency can be influenced by providing seismic isolation system and how the masonry infills behave as a constituent part of the structural system in seismic events. The performance of building will be evaluated on the basis of seismic parameters like storey displacement, time period, inter-storey drifts and base shear.

"TIME HISTORY ANALYSIS OF IRREGULAR RC BASE ISOLATED STRUCTURE WITH AND WITHOUT MASONRY INFILL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.444-453, June-2019, Available :http://www.jetir.org/papers/JETIR1906354.pdf

"TIME HISTORY ANALYSIS OF IRREGULAR RC BASE ISOLATED STRUCTURE WITH AND WITHOUT MASONRY INFILL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp444-453, June-2019, Available at : http://www.jetir.org/papers/JETIR1906354.pdf