Abstract
The column at end of the Joetsu Shinkansen railway viaduct ( whose name is The 3rd WANATSU viaduct. rigid frame structure) reached a shear collapse after yielding of main reinforcement in The 2004 Mid Niigata prefecture Earthquake.
The space under the Rigid Frame Structure was used as a snow melting machine room, so that the base concrete which has underground beams and steel tube piles for supporting machine weight existed.
This paper says that the main reason why the column reached a shear collapse was binding the middle point of the colomn with the base concrete and backfilled soil, reporting acutual damaged situation and analyzing the structure by using 2-D FEM method.
And, we report the influence of the base concrete and the backfilled soil to column collapse mode from the result of some parametric studies.
