Seismic Response of RC Elevated Water Tank Considering Site Specific Acceleration Time History

摘要

Elevated liquid storage tanks are extensively used to store water, inflammable liquids and other chemicals. Also, required to remain competent enough during and after earthquake to ensure availability of water supply in earthquake affected regions. A seismic analysis of such tanks must take into account considering the fluid-structure interaction and sub soil condition, which are highly responsible for the amplification of ground motion. In present paper time history analysis of elevated water tank is carried out for more realistic seismic analysis using finite element software SAP 2000 [1]. Site specific soil data has been collected for six different sites of Ahmedabad, metropolitan city of India and using one dimensional site specific ground response analysis software EERA [2] modified time history for acceleration data records of Bhuj earthquake 2001 is developed. Under modified time history analysis responses like base shear, overturning moment, top and sloshing displacement have been compared and contrasted. A study reflects the importance of site specific time history analysis and result shows that the structure responses are exceedingly influenced by water level and different subsoil condition.