Determination of buckling strength of silos composed of corrugated walls and thin-walled columns using simplified wall segment models

摘要

The paper deals with buckling of metal cylindrical silos composed of corrugated sheets and thin-walled open-sectional columns. A simplified silo wall segment model with a few columns was proposed for calculations of the global buckling strength of silos instead of comprehensive 3D computations of the entire silo structure. Calculations were carried out for three real silos with a different geometry (two slender silos and one intermediate slender silo). Comprehensive linear bifurcation/buckling analyses and geometrically non-linear stability analyses for both imperfect and perfect silos were applied. Silos and silo wall segments were mainly modelled both with an equivalent orthotropic shell for walls and 1D beam elements for thin-walled columns and with shell elements for walls and columns. The silo walls were loaded by tangential wall pressure, horizontal wall pressure and patch load according to Eurocode 1. The simplified silo wall segment models fully proved their efficiency in FE calculations of the buckling strength of silos.