Implementation of A Liquefaction Subroutine in ABAQUS Based on The Modified Hardin-drnevich Soil Backbone Curve Model

Zhe Ren; Sainan Zhu; Yanhua Cheng; Mei Yang

doi:10.54691/nqfagb50

Authors

Zhe Ren College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan 063210, China
Sainan Zhu College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan 063210, China
Yanhua Cheng
Mei Yang

DOI:

https://doi.org/10.54691/nqfagb50

Keywords:

Numerical simulation; Byrne incremental model; Modified Hardin-Drnevich; Liquefaction.

Abstract

Liquefaction caused by earthquakes can affect the stability of underground structures. Numerical simulation of liquefaction is therefore necessary. By combining the modified Hardin-Drnevich soil constitutive model with Byrne's modified Martin pore pressure increment model, this paper develops an ABAQUS subroutine incorporating the modified Hardin-Drnevich soil constitutive model and the Byrne pore pressure increment model based on the implicit interface of ABAQUS. Numerical models in ABAQUS and FLAC3D are established respectively based on the undrained dynamic triaxial test results of Nanjing saturated fine sand, and the effective analytical capability of the proposed subroutine is preliminarily verified. Through comparing a total of 6 groups of numerical calculation results under different working conditions, this study verifies the influences of pore pressure growth trend, initial effective pore pressure and dynamic shear ratio on the liquefaction process. It is proved that the calculation results of the proposed subroutine in dynamic triaxial tests are superior to those of FLAC3D. The causes of numerical calculation errors are discussed, and the feasibility of developing the liquefaction numerical simulation subroutine for ABAQUS is verified.

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