Effects of liquefaction on seismic response of a storage tank on pile foundations
During the 1995 Kobe earthquake widespread liquefaction occured in fill deposits of man-made islands in the port area of Kobe. The liquefaction of thick fill deposits resulted in extensive sand boils, large lateral movement and settlement of the ground. A number of piles has been found damaged or collapsed due to the excessive ground response as above. One important observation from the Kobe earthquake was that fewer signs of liquefaction and lesser ground deformation were found in reclaimed deposits that have been treated by ground improvement measures. In order to investigate the effects of liquefaction and ground improvement on the performance of pile foundations, a detailed study was conducted on a well-documented case history from the Kobe earthquake. This paper highlights the effects of liquefaction and ground improvement by sand compaction piles on the response of an oil-storage tank supported on pile foundations.