敷地의 地質條件과 地震危險度와의 關係

Influence of ground conditions on seismic risk

Seismic risk mapg in Korea are made using Korean historical and modern earthquake data. The risk maps made by several methods are presented in contour line of vibratory ground motion (acceleration, velocity, and displacement). The methods used are Kawasumi (1951), Kanai (1668), and Hsich et al (1975) methods. The maps made by Kawasumi (1951) method represent the acceleration distribution on alluvial ground and those by Kanai (1968) method show the acceleration, velocity, and displacement at bed rocks. The risk analysis by the method of Hsich et al (1975) shows the probability of acceleration at each of soft, medium, and hard grounds in each of tectionic provinces in Korea.