Browsing by Author "Pereira, Diogo Carvalho"
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- Colunas mistas de aço parcialmente revestidas com betão embebidas em paredes em condições de incêndioPublication . Pereira, Diogo Carvalho; Piloto, P.A.G.The fire resistance of partially closed columns (HEB and IPE) depends on the temperature evolution during exposure to fire. This work aims to verify the effect of the fire scenario on the plastic strength to axial compression and on the effective bending stiffness. These two parameters depend on the effect of temperature on the cross section. The new proposed formulas were validated for different cross sections, considering the flange temperature, the web height and residual temperature, the concrete cross section and residual temperature, the reduction of stiffness and the reduced strength of the reinforcement. An advanced calculation method (ANSYS) was used to validate this proposal, based on the analysis of the cross section under the conditions described. The main conclusions will be to make a proposal to amend Annex G of Eurocode 1994-1-2, to review the way in which composite columns embedded in walls are dimensioned.