Seismic Behaviour of Underground Water Tank Considering Soil- Structure Interaction

Abstract

In order to store and distribute water for various purposes, such as household supply, for industries, for irrigation purposes in agricultural fields, Underground water tanks are used. These tanks maybe empty, partially or completely filled with water surrounded by soil in all directions are most susceptible to seismic forces. Behavior of Underground water tank during ground motion needs to be analysed seriously and carefully to ensure serviceability of this tanks as well as water tightness and cleave prevention during earthquake. The studies found on Underground water tanks subjected to seismic loading considering soil-structure interaction are insufficient. In this study, a linear static analysis of Underground water tank is performed and seismic performance in accordance with IS: 1893 (Part-1):2016 was analysed with and without Soil-Structure Interaction to understand its behavior. For this purpose, Finite element modelling of Underground water tank has been done in SAP-2000 v.14 for the most critical earthquake zone (zone-v) and type-II soil. The results show that the Underground water tank is behaving satisfactory under seismic loading.