EVALUATING THE PERFORMANCE OF WATER STORING STRUCTURES WHEN SUBJECTED TO SEISMIC LOADING

Abstract

India has a track record of huge earthquake incidences in the regions like Bhuj, Kutch, Delhi, Himalayas and periphery of Nepal etc. Recent earthquakes are evident that structures designed in these seismic prone regions are severely damaged due to the seismic excitation. Therefore structures situated in this particular region have to be given more importance in their design and execution rather than structures located in other regions where earthquake is not frequent. Bhuj earthquake is an ideal example where structures were not able to resist the earthquake; especially the structures are multi-storied buildings, water storing structures, load bearing masonry structures etc. Literature is evident that ample amount of work have been carried out as far as multi-storied buildings are concerned. This particular project deals with water storing structures like overhead tank. To study the Seismic response of overhead R.C water tank subjected to heavy seismic excitation. A water tank is considered in zone V. The volume of overhead water tank is about 10,00,000 liters ≈ 2,64,172 Gallons. To understand the seismic response different F.E.M mathematical models of overhead tanks have been modeled/generated in the software SAP2000 v17. Equivalent static analysis and response spectrum method have been used to predict the seismic response. To study the influence of full tank during seismic loading a detail stress analysis has been performed (Von Mises Stress Criteria).