Employing Internal Flexible Wall as Mass Absorber in Tanks Subjected to HarmonicExcitations

The possibility of employing internal wall as mass absorber in rectangular water storage tanks subjected toharmonic ground motion excitation is investigated in this paper. Internal walls are usually used to lengthenthe water path in the tank that could also be used as mass absorber to control seismic demand on tank'sexterior walls. Derivation of the response of the coupled system including rigid external walls, flexibleinternal wall and fluid field is in frequency domain. The responses of the tank are evaluated subjected toharmonic excitations. By tuning the dynamic behavior of the tank and the sloshing liquid by changing themass and stiffness of internal flexible wall, it is shown that wave elevation and water pressure on externalrigid walls can be significantly reduced