Induced Stresses Due to Thermal Effects in Composite Steel–Concrete Girders
Tomme: LX (LXIV) Fascicle: 3 | 2014
Pages: 79-88
Abstract text:
The temperature variations of the air in shadow, of the solar radiations and thermal radiations produce variations in the temperature distribution in the individual members of a structure. This paper presents the influence of the difference of temperature between the opposite faces of a steel–concrete composite cross section upon the internal stresses state. In the steel–concrete composite structures, the concrete from the composite structure slab cannot have a free deformation arising from the temperature variation along the height of the cross section because the slab is joined to the metal structure through joining members (connectors). Consequently, as the tendency to shorten or lengthen the concrete slab is prevented, internal stresses are induced to the composite structure, and these stresses overlap those produced by shortening or lengthening in the slab area. The mechanism through which stress develop from temperature variation are exemplified for the case of a simply supported steel–concrete composite girder.
Key Words:
composite girders; thermal effects; state of stresses; working example.
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