The Structural Engineer > Archive > Volume 69 (1991) > Issues > Issue 15 > Structural Response of RC Elements Under Fire
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Structural Response of RC Elements Under Fire

One of the main problems in assessing the structural response of RC elements during fire is the non-linear temperature profiles through the depth of exposed elements, leading to a non-linear distribution of strains which violates the principle 'plane cross-sections remain plane'. To fulfil the planeity of cross-sections under fire conditions, self-generating self equilibrating stresses are developed, arising from the self-restraint of the cross-sections. As a consequence, and disregarding the side-effects of possible internal microcracking, an 'effective' temperature profile should be determined, resulting in a reduced effective imposed curvature and a reduced axial deformation of the element. T.P. Tassios and M.P. Chronopoulos

Author(s): Tassios, T P;Chronopoulos, M P

Keywords: reinforced concrete;temperature;fire;cracking;variable;analysis;worked examples;design;effects