Viscoplastic Analysis of a Continuous Cylindrical Opening Surrounded by Volcanic Tuff

摘要

Nuclear blast effect on a deep underground tunnel was studied for quasi-static and quasi-transient loading conditions. A finite element model was developed and used with a two-dimensional constant strain triangle computer code. Viscoplasticity was introduced through the Malvern flow law in conjunction with the Drucker-Prager constitutive equations. The quasi-static results compared favorably with experimental studies. Quasi-transient results can be compared against future experimental work and field tests. (Author)