Underground Structures under Fire-From Material Modeling of Concrete Under Combined Thermal and Mechanical Loading to Structural Safety Assessment

摘要

Tunnel cross-sections are analyzed applying different material models (linear-elastic and linearelastic/ideal-plastic) and modes to consider fire loading (equivalent temperature loading and nonlinear temperature distribution). The influence of spalling and the effect of combined thermal and mechanical loading (by consideration of Load Induced Thermal Strains-LITS) on the numerical results is investigated.