Three-dimensional Elastic-plastic Model Research Articles

Incremental Variable Plastic Three-Dimensional Elastic-Plastic Finite Element Analysis in Soft Rock Tunnel Excavation

The plane finite element analysis is mostly adopted in soft rock tunnel excavation instead of three-dimensional nonlinear finite element analysis at present, but almost every underground engineering is a spatial nonlinear problem which, in many cases, cannot be simplified into a plane problem. This paper presents a three-dimensional elastic-plastic finite element analysis of incremental variable plastic in soft rock tunnel excavation, through analyzing the tunnel excavation and support, and combining the incremental variable plastic stiffness method into three-dimensional elastic-plastic model in light of the advantage of increment variable stiffness method and the incremental additional load method. Simulation results show that, the three-dimensional elastic-plastic finite element analysis model presented in this paper changes little final deformation under different load release coefficients, together with small support stress.

1215 粒子法のコンクリート解析への応用(S01-1 メッシュフリー法/粒子法と関連技術(1),S01 FEM/メッシュフリー法/粒子法と関連技術)

1215 粒子法のコンクリート解析への応用(S01-1 メッシュフリー法/粒子法と関連技術(1),S01 FEM/メッシュフリー法/粒子法と関連技術)