An Earthquake Resistant Design for an Overhead Intze Tank

From the analysis of water tank for seismic loading in different mode shapes, it is decided that for the range of mode shapes 2nd to 4th proper damping is necessary or considerable strength must be provided to the reservoir by making the supporting column and foundation very much resilient falling under that frequency range. Thus it has been found that sloshing effect and sloshing frequency is an important parameter in the seismic analysis of water tank. It is very important, in predicting damage of tanks, to evaluate ground motions in the long- period range, including the natural period of liquid sloshing of a large storage tanks and water reservoirs. Free board to be provided within the tank may be based on the maximum height of sloshing wave of water, if enough free board isn’t provided, roof structure ought to be designed to resist the uplift pressure because of sloshing of water tank.