Dynamic Analysis of RCC Elevated Water Tank Considering Effect of Conventional and Composite Staging

Abstract

The raised water tank is the most significant building for storing huge amounts of water at a certain elevation to distribute the water in the surrounding area for survival purposes and to develop pressure for the distribution system. As elevated tanks are commonly utilized in seismically active areas, their seismic design must be thoroughly examined. The sloshing of the water during an earthquake may be one of the most important aspects for specific proportions of the tank and construction. The fluid-structure interaction complicates the dynamic analysis of a liquid-filled tank. As a result, there is a need to concentrate on the seismic safety of lifeline structures in terms of seismic design systems that are both safe during earthquakes and can sustain higher design forces. In this study, an elevated water tank is analyzed under seismic loading by considering conventional RCC staging and composite staging. The main focus of the study was to reduce the damage to the water tank under dynamic loading and to know the effect of composite member staging on the design performance of the water tank. The results were collected in terms of maximum base shear, overturning moment, displacement of tank etc. After performing the study, it was seen that composite columns in the staging of overhead water tanks improve the performance under seismic loading and help to control the roof displacement of the overhead water tank due to more stiffness provided by composite columns.