Elasto-plastic stability bearing capacity calculation for K8 single-layer reticulated shells under fire conditions

The elasticity modulus of steel will decrease with the rise of temperature due to fire, and it's much easier to have global buckling phenomenon for reticulated shells. In order to obtain elasto-plastic stability bearing capacity calculation method for signle-layer reticulated shells, FEA principles for calculating single-layer reticulated shells under fire conditions were discussed, and then, large numbers of numerical simulation models were established to give systematic analysis on the two typical cases which include global non-uniform temperature distribution and localized high temperature for K8 type shells. The calculation formula for calculating elasto-plastic bearing capacity for K8 single-layer reticulated shells is obtained.