Abstract
The S-wave velocity is one of the most important parameters in seismic response analysis of soil layers. However, PS-logging, which measures S-wave velocity in borehole, is not so frequently carried out. Hence the S-wave velocity is often estimated using SPT N-value and other soil parameters. In this paper, the results of comprehensive geological surveys conducted at K-NET sites and Yokohama seismometer network sites are employed to propose reliable estimation models of S-wave velocity. Based on a multiple linear regression analysis, the S-wave velocity is expressed as a function of N-value, soil type, and geologic age. The proposed equations are then compared with existing relationships.
