SEISMIC DAMAGE ASSESSMENT OF RESIDENTIAL FILL GROUND IN THE EASTERN PART OF KYOTO BASIN
Supervisor: Toshitaka KAMAI, Fawu WANG
Several earthquakes record that the residential fills always suffer severe damages. In order to know the seismic damage mechanism and evaluate the damage extent of residential fill ground, research is carried out on two fill grounds in the eastern part of Kyoto basin. The research works include field survey using surface wave explorations; mechanism analysis by using Fast Lagrangian Analysis of Continua (FLAC) software. Some remarkable conclusions are summarized as follows: In Jyodo-ji area, it is a residential fill on soft alluvium ground. The geological condition is back swamp. The thickness of surface fill soil is about 1~4 meters. The simulations show that the shear strain accumulates in the soft sediments. Sliding arc surface generates in the upper part of the ground. In Kiyomizu-dera area, it is a valley filled ground. The geological condition is hilly platform. The simulations show that fill soil parts have larger shear strain and displacement. With the groundwater level increasing, the acceleration amplification ratio slightly decreases, but the shear strain band and displacement zone become larger.
|Citation: ||Bulletin of IISEE, 44, 55-60.|