Non-linear transient analysis of soil domain under variable soil properties with spring-dashpot type local absorbing boundaries

ABSTRACT

This paper presents a parametric study on nonlinear transient analysis of different soil media with unbounded domain by finite element technique. Different types of soil properties have been considered by varying the angle of internal friction of the soil with keeping the cohesion property fixed. In order to obtain the nonlinear transient response soil domain has been modeled considering C2 approximated rounded hyperbolic Mohr-Coulomb yield criteria. Unconditionally stable implicit type integration Newton-Raphson method has been used to obtain the nonlinear transient responses of the soil domain. Spring-dashpot type local absorbing boundary condition has been implemented to model the unbounded semi-infinite soil domain for finite element analysis. The obtained responses from the numerical experiment show that cone type local absorbing boundary condition has profound effect on simulating the nonlinear transient analysis of different soil medium. The responses show that use of spring-dashpot boundary plays an important role in reducing the computational domain size for different soil media. Nonlinear soil behavior is prominent when the angle of internal friction is increased.

KEYWORDS:

• Finite element method
• transient analysis
• rounded hyperbolic Mohr-Coulomb yield criteria
• unbounded domain
• local absorbing boundary
• spring-dashpot boundary

Disclosure statement

No potential conflict of interest was reported by the authors.