火灾下K8型单层网壳弹塑性稳定承载力计算

he 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 give an elasto-plastic bearing capacity calculation method under fire conditions for single-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.