PARAMETRIC STUDY ON SEISMIC RESPONSE OF ELEVATED WATER TANKS USING ETABS

<p>Elevated water tanks are essential lifeline structures, particularly in urban and seismic-prone<br>regions. Their seismic performance is highly influenced by design parameters such as aspect ratio,<br>water volume, and staging height. This study investigates the effect of these parameters on the seismic<br>behaviour of elevated water tanks using finite element modelling in ETABS software. A total of nine<br>different models were developed by systematically varying the aspect ratio, liquid volume, and staging<br>height. Key seismic responses including base shear, base moment, lateral stiffness, and time period<br>were analysed as per IS 1893-2002 (Part 2 – Draft) and IITK-GSDMA guidelines. The results indicate<br>that increasing aspect ratio and staging height lead to higher seismic forces and lower lateral stiffness,<br>whereas increasing water volume significantly affects base reactions. The study highlights critical<br>design considerations to improve structural resilience and ensure the safety of elevated water tanks in<br>earthquake-prone zones.</p>