Radek Štefan

TL;DR: A mathematical model allowing coupled hygro-thermo-mechanical analysis of spalling in concrete walls at high temperatures by means of the moving boundary problem is presented and a simplified mechanical approach to account for effects of thermal stresses and pore pressure build-up is incorporated into the model.

TL;DR: In this paper, the authors investigated the effect of air entrainment on the compressive strength of normal-strength concrete at temperatures ranging from 20°C to 800°C.

TL;DR: A non-linear numerical scheme arising from the implicit time discretization of the Bazant-Thonguthai model for hygro-thermal behavior of concrete at high temperatures reproduces well the rapid increase of pore pressure in wet concrete due to extreme heating.

TL;DR: In this paper, a numerical procedure for investigation of reinforced concrete columns and steel-concrete composite columns at normal and high temperatures is presented, based on sectional analysis and moment-curvature approach.

TL;DR: In this article, the authors investigate and present the thermal behaviour, propensity to spalling, and residual strength of various types of cementitious composites exposed to fire and conclude that concrete containing mineral wool shreds performs very well when subjected to fire.