Reviewing dynamic analysis of base-isolated cylindrical liquid storage tanks under near-fault earthquakes

Abstract

Base-isolated structures are susceptible to more damage under near-fault earthquakes, due to its long fundamental time period, than under far-fault earthquakes. A brief review of the literature, related to the response of base-isolated structures under near-fault earthquake and representation of near-fault earthquake motion using equivalent pulses, is presented herein. Dynamic analyses are carried out to investigate the response of cylindrical liquid storage tanks under near-fault earthquakes. The studies are carried out for ground supported, anchored without isolation and base-isolated anchored tanks, where the isolator considered is lead-rubber bearing. Two types of configurations of the cylindrical liquid storage tanks, i.e. broad and slender, are considered in the present study. Equivalent pulse type acceleration inputs are used to study their effectiveness to predict the seismic response of base-isolated liquid storage tanks. The response under equivalent pulse type acceleration inputs are compared w...