Parametric Study of Seismic Soil‐Tank Interaction. I: Horizontal Excitation

Abstract

Dynamic soil-tank interaction under horizontal seismic excitations has a profound effect on the amplification of hydrodynamic forces and moments exerted on tank structure. Analytical mechanical models for flexible cylindrical tanks, which also account for the effect of rigid-base rocking motion and lateral translation, are used with a lumped-parameters idealization of foundation soil. A comprehensive parametric analysis is conducted to study the effects and relative importance of a few factors influencing the seismic response of tank-liquid-soil systems. Computer programs are implemented to evaluate the system response to ground earthquake motions. Results are presented in the form of graphs that give engineers a useful tool for understanding the seismic performance of the system and for developing effective design procedures. © ASCE.