抄録
By the Niigata Earthquake on June 16, 1964, many reinforced concrete buildings were damaged in and around the city of Niigata, while damage to wooden buildings was not so noticeable.
Among about 1500 reinforced concrete buildings located in Niigata City, approximately 310 suffered damage. Most of these damaged buildings settled or tilted en masse without appreciable damage to the superstructure, and two reinforced concrete buildings overturned completely.
Such peculiar features of damage are attributed to the specific behavior of sandy ground during the earthquake; that is, the sandy ground was liquefied by the earthquake vibration and the complete loss of bearing capacity resulted.
From the view-point of soil mechanics and foundation engineering, the mechanism of liquefaction and the conditions of sandy soil critical to the the occurrence of liquefaction are discussed in this paper.
