FLUID-STRUCTURE INTERACTION IN WATER TANKS: DYNAMIC ASSESSMENT

Abstract

Due to increased population and growth of cities, the number of raised water tanks servicing the demand urban

\swater system is on the rise. As it has been indicated in the Iranian code of practise for Earthquake /2800 due

\sof the necessity of sanitation and hygiene water tanks have been recognised as vital constructions during the unforeseen occurrences such as earthquake. There is a high anticipation not to observe any phase out for their serviceability following the earthquake. Because of the presence of fluid with various behavioural features of structures containing it Because the most part of mass of tanks are positioned in a great distance from their foundation, the behaviour of these sorts of structures in comparing with conventional structures are more sophisticated. In this study, cylindrical concrete water tanks, which feature a central shaft, have been examined with consideration the influence of the structure’s contact with water via accurate execution of boundary constraints on the interface between fluid and structure. Also considering the volume of water in the tank and their response under recorded acceleration of varied earthquakes utilising finite element approach. The findings were then compared with proposed ways by Iranian code /2800, which shows a significant variation between the approaches given.