HR: 0800h
AN: S51A-0227    [Abstracts]
TI: Development of Vs30 map in Taiwan using multivariate geostatistical method
AU: * Lee, C
EM: ct@ncu.eud.tw
AF: National Central University, No.300, Jhongda Rd., Jhongli City, 32001, Taiwan
AU: Tsai, B
EM: milky@gis.geo.ncu.edu.tw
AB: Average shear-wave velocity of the upper 30 meters soil profile (Vs30) is a key to indicate the site response characteristics and amplification of ground-motion. The purpose of this study was mainly on mapping the distribution of Vs30 in Taiwan with available data and multivariate geostatistical techniques. 320 drill and PS logging data at existing strong-motion stations were used to establish the spatial relationship between shear- wave velocity and SPT-N. And then, this model was used to estimate the shear-wave velocity of each drilling section from GEO2005 drill database of the Central Geological Survey. Finally, a geostatistical method called ˇ§Kriging with varying local meansˇ¨ was applied to generate a Vs30 distribution map of Taiwan. A site classification result of Taiwanˇ¦s strong-motion stations is also updated based on this new Vs30 map.
DE: 7212 Earthquake ground motions and engineering seismology
DE: 7294 Seismic instruments and networks (0935, 3025)
SC: Seismology [S]
MN: 2007 Fall Meeting