Abstract
In visco-elasticity analysis using FEM, approximation with nodal load equivalent to creep strain is often utilized. However, the propriety of the use of the aforementioned seems to be left out of consideration.
In this note, the accuracy of this approximation is examined through simulated tunnel construction by firstly obtaining precise solutions and then by comparing them with those obtained through approximation. The comparison proved that the use of approximation results in, in some case, impractical solutions.
A method for correcting this erroneous process is also proposed, which is confirmed to be effective for improving the level of accuracy of the solutions obtained.
