Fire Safety Science Digital Archive

In analyzing thermal stresses and deformation of a high rise steel structure, exposed to a compartment fire, it is convenient to divide the structure into (a) the local substructure, directly fire exposed, (b) the adjacent substructure, comprising the nearest floors and spans around the fire compartment, and (c) the remaining part of the structure. For substructure ( a ), the deformation behavior is normally elasteplastic, for substructure (b) purely elastic. For the remaining part (c),the fire induced stresses and deformations are generally negligible. This paper presents a method for the calculation of the stress and deformation behavior of a high rise steel structure, exposed to a compartment fire, based on a subdivision of the structure as above. In order to illustrate the structural fire behavior, 48 buildings have been analyzed according to the method presented.