Rahul, N K and Avinash, A R and Kamath, Kiran and Krishnamoorthy, Agrahara (2018) Effect of Soft Storey Level VAariation on Torsional otation of Lead Rubber Base Isolated Structures. International Journal of Civil Engineering and Technology, 9 (3). pp. 807-814. ISSN 0976-6308

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Abstract

The effect of variation of soft storey level in the base isolated structure on torsional rotation has been studied in this paper. For the study, thirty storey unsymmetrical reinforced concrete (RC) structure resting on lead rubber bearing (LRB) has been considered. Structure is subjected to bi-directional seismic excitations. The torsional rotation of base isolated structure is studied for each soft story level variation in the structure and compared with fixed base structure. Results indicates that, LRB base isolated structure reduces torsional rotation as compared to fixed base. It is also found that, effectiveness of LRB for torsional responses reduces when soft story are at higher levels of buildings.

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