Comparison of simplified and advanced design methods for determining mechanical resistance of timber structures exposed to fire

Abstract

ABSTRACTEurocode 5, Part 1–2 for the design of timber structures in fire conditions contains two simplified methods and advanced calculation methods, as well. The first method is the reduced cross-section method, which is the recommended procedure in Eurocode 5, Part 1–2. The second method is the reduced properties method. There are differences in results between these two methods. These methods are designated for evaluation of the mechanical resistance of timber members and there is a calculation of the charring depth by means of these simplified rules. Moreover, there are advanced calculation methods. These advanced methods deal with the determination of the charring depth, the thermal response model and the structural response model. They can be used for members, parts of a structure or entire structures. This paper presents differences between these simplified and advanced methods and the comparison of results.