Proceedings of the
8th International Symposium on Geotechnical Safety and Risk (ISGSR)
14 – 16 December 2022, Newcastle, Australia
Editors: Jinsong Huang, D.V. Griffiths, Shui-Hua Jiang, Anna Giacomini, Richard Kelly
doi:10.3850/978-981-18-5182-7_14-004-cd
Regional Liquefaction Evaluation Considering the Effect of Effective Friction Angle and Its Spatial Variability
1College of Civil and Transportation Engineering, Hohai University, Nanjing, China.
2College of Civil Engineering, Zhejiang University of Technology, Hangzhou, China.
ABSTRACT
Spatial variability and uncertainty of soil properties affect the engineering properties of ground. In this work, the effects of effective friction angle and its spatial variability on the regional liquefaction potential were investigated through a case study by nonlinear dynamic numerical simulation. The spatial correlated random fields of effective friction angle evaluated from CPTs data were generated by the conditional sequential Gaussian simulation method coupled with Monte Carlo simulations. The 3D finite element models with uniform and spatial correlated effective friction angle were then respectively built using the finite-difference program FLAC3D. The results show that the accumulation of excess pore pressure can be divided into three phases. The spatial variability of effective friction angle has prominent influence on the regional liquefaction potential.The selection of effective friction angle for uniform model should be careful as it has non-monotonic influence on the regional liquefaction potential of the site.
Keywords: Liquefaction, spatial variability, random field model, effective friction angle, FLAC3D
