Regression models of shear wave velocities in Taipei basin

The fundamental theory of shear wave velocity was studied in this paper to select proper parameters for the regression model. Previous regression equations were examined, and the most rational regression model was pointed out. Regression equations were recommended for the clayey, silty, and sandy soils of the Taipei basin. The research showed (1) that N‐value was not the best parameter if the effects of soil type and geologic effect were considered, (2) that the multiple regression model with parameters of N‐value and depth implied a form of shear wave velocity with specific physical meaning, but these two parameters were not independent of each other, and (3) that the intrinsically linear model with the parameter of depth was acceptable when the local soils were first classified according to soil type and geologic effect – then its R‐square value was comparable to the R‐square value of the multiple regression model.