Influence of charring on the fire resistance of timber columns
Influence of charring on the fire resistance of timber columns is under consideration in this Graduation thesis. In the second section timber charring and the phenomenon of the pyrolysis of timber is explained. Further, the literature review in the field of empirical and numerical models of timber charring is given. In the third section, the main procedures of the structural fire-buckling design in accordance with EN 1995-1-1:2005 are analysed. In the fourth section, the numerical and empirical models are further explained through numerical examples. The calculations in numerical examples are carried out with a computer program developed in Matlab environment. The empirical models are carried out using program MS Excel. Based on the heat transfer analysis in the numerical model a distribution of char is calculated. The empirical equations for determination of char distribution are given in the second section. The calculated distribution of char is used then to calculate the buckling capacity of timber columns exposed to fire. In the fifth section the selected empirical and numerical models are compared to each other. The conclusions are given in the last section.