기반암 깊이와 토층 평균 전단파속도를 이용한 국내 지반분류 방법 및 지반 증폭계수 개선Development of Site Classification System and Modification of Site Coefficients in Korea Based on Mean Shear Wave Velocity of Soil and Depth to Bedrock

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Site response analyses were performed based on equivalent linear technique using the local geologic and dynamic site characteristics, which include soil profiles, shear wave velocity profiles and depth to bedrock for 125 sites collected in Korean Peninsula. From the results of site response analyses, 2-parameters site classification system based on the combination of mean shear wave velocity of soil and depth to bedrock was newly recommended for regions of shallow bedrock depth in Korea. First, as the borders of bedrock depth (H) for site classification were determined as 10m and 20m, the soil sites were divided into 3 classes as H1, H2 and H3 sites. And then, the 3 site classes were subdivided into 7 classes based on the mean shear wave velocity of soil (Vs,soil). The feasibility of new site classification system was verified and the representative site coefficients (Fa and Fv) and design response spectrum were suggested by analyzing uniform trend and dispersion of site coefficients for each site class. The suggested site coefficients and the regression curves present the nonlinear characteristics of soils according to the change of rock outcrop acceleration with uniform trend effectively. From the comparison between the mean values of response spectrum which was acquired from the site response analysis and the suggested design response spectrum, there was a little difference in some of site classes and it was verified to adjust the integration interval to make it more suitable for the site condition in Korea.
Publisher
대한토목학회
Issue Date
2008-01
Language
Korean
Citation

대한토목학회 논문집C, v.28, no.1C, pp.63 - 74

ISSN
1015-6348
URI
http://hdl.handle.net/10203/90332
Appears in Collection
CE-Journal Papers(저널논문)
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