ZHANG Yu-jun, LIU Yi-ping. Finite element analyses for influence of embedded depth of an underground
opening on double-nonlinearity of surrounding rockmass[J]. 2003, 24(1).
ZHANG Yu-jun, LIU Yi-ping. Finite element analyses for influence of embedded depth of an underground
opening on double-nonlinearity of surrounding rockmass[J]. 2003, 24(1).DOI:
The finite-element method with small deformation formulation as well as the large deformation formulation
is used to perform elastoplastic analyses of an underground opening with different embedded depths
and investigate the plastic zones
displacement distributions and secondary stress fields in the surrounding rockmass. It can be seen that when the embedded depth is small the computations obtained from small deformation and large deformation methods are quite close to each other
but when the embedded depth is larger
there exists a distinct difference between the results of the two methods because the double-nonlinearity of surrounding rockmass acts obviously at this time
so for the latter case
the right selection is applying the large deformation theory.