Study on Elasto-Plastic Stability Bearing Capacities for K6 Single-Layer Reticulated Shells under Fire Conditions

Abstract

The elastic modulus of steel will decrease in case of high temperature which makes the reticulated shells easier to have the global instability phenomenon. In order to obtain the elasto-plastic stability bearing capacities for K6 single-layer reticulated shells [1], nonlinear finite analysis compete process was conducted by ANAYS software under on the two typical cases which include global non-uniform temperature distribution and localized high temperature. Based on the calculation formula for single-layer reticulated shells at ambient temperature, the calculation formula for elasto-plastic stability bearing capacity for K6 single-layer reticulated shells was obtained.

Elasto-Plastic Bearing Capacity of Four Types of Single-Layer Reticulated Shell Structures Under Fire Hazards

“…To be conservative, a factor of 0.9 is further applied to the statistical results to provide a safety margin. The¯nal capacity reduction factor for design is given as follows 17 :…”