A consideration on shear wave velocity estimated by n-value

The shear wave velocity is necessary for modeling the ground so as to calculate the amplification characteristics and the deformation of the ground by seismic response analysis. Basically, the PS logging is performed to obtain the shear wave velocity, but it is rare to perform the PS logging unless it is an important building of the design. Therefore, an expression for estimating the shear wave velocity from the N value of the standard penetration test has been proposed. In this report, we verified the relationship between the estimated value by Ohta and Goto or Imai et. al and measured value. Using actual measurement data conducted after 2000, review the correction factor of the estimation formula of the original, we propose equations to estimate the measured value slightly smaller. © 2019 Architectural Institute of Japan. All Rights Reserved.