A wide number of recent earthquake records has been obtained from sites close to the seismic causative fault. They have high damage potential in near-fault areas due to the proximity of the source and effects of forward directivity. In these type of earthquakes, most of the emanating energy concentrates in a high-velocity pulse. On the other hand, considering their type of use, dynamic analysis of liquid storage tanks are one of the most important subjects in earthquake engineering. In this article the water medium is modeled using smoothed particle hydrodynamics method and tank's structure is modeled by finite element method. Then under a pulse-like earthquake excitation time history analysis has been performed. For verification purposes the modeling accuracy was compared with the available experimental and numerical results. The parameters of sloshing height, acceleration at the top of the tank’s wall, base shear, force per unit width and wall displacement were obtained for evaluating the effect of pulse. The results showed that the time difference between velocity pules with maximum base shear and force per unit width have the same value. While this time difference has a larger value for maximum sloshing height.