COMPUTING RESPONSE OF TANKS WITH 2 LIQUIDS

A simplified procedure for computing the dynamic response of flexible tanks containing two liquids under a lateral base motion of arbitrary temporal variation is proposed. It requires the input of ground accele ration in the rigid tank solutions to be replaced by the pseudoacceler ation function corresponding td the fundamental mode of vibration of t he tank-liquid system. The procedure yields results with good accuracy for tanks with height-to-radius ratio ranging from 0.3 to 1.2, a prac tical range of height-to-radius ratio of most tanks. This simple proce dure is an extension of the method used for the evaluation of response quantities for flexible tanks with only one liquid. Response quantiti es that may be computed by the proposed approach include the hydrodyna mic pressure, base shear, base moment, and foundation moment. The effe ct of the soil-Structure interaction on the response quantities can be taken into account. Only the impulsive components of response quantit ies are considered in the proposed approach, since the convective comp onents can be computed by considering both the tank and its supporting medium to be rigid.