International Journal of Advanced Innovative Technology in Engineering (IJAITE)

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Study on Seismic Behaviour of Multistory Building with And Without Soft Story Effect using Masonary Strut

Minal U. Pawar, Prof. M. R. Nikhar, Prof. M. M. Lohe

Abstract :

Construction of multi-story buildings with open first stories is common practice in India. This is an unavoidable feature and is generally adopted for parking or reception lobbies. Multistoried buildings with open ground floors are inherently vulnerable to collapse due to earthquake load. This construction is still widespread in developing nations due to the social and functional need for providing car parking space at ground level or at the intermediate story. The engineering community warned against such buildings from time to time it is also known as a weak story due to less substantial resistance than the above story or below. Along with gravity load structure has to withstand lateral load which can develop high stresses which leads to the destruction of buildings. In this paper, the R.C.C. building is modeled and analyzed in two cases. I) Model with in-filled frame single strut approach from 1st story. II) Model with in-filled frame single strut approach with soft story effect. Response spectrum analysis is used for analyzing building models in ETABS. The performance of the building is evaluated in terms of story drift, story displacement, and time period. It is found that the steel braced system significantly contributes to the structural stiffness and reduces the maximum inter-story drift, lateral displacement of R.C.C building. The results of different systems are discussed and conclusions are made.

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